/*
morphic.js
a lively Web-GUI
inspired by Squeak
written by Jens Mönig
jens@moenig.org
Copyright (C) 2016 by Jens Mönig
This file is part of Snap!.
Snap! is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
documentation contents
----------------------
I. inheritance hierarchy
II. object definition toc
III. yet to implement
IV. open issues
V. browser compatibility
VI. the big picture
VII. programming guide
(1) setting up a web page
(a) single world
(b) multiple worlds
(c) an application
(2) manipulating morphs
(3) events
(a) mouse events
(b) context menu
(c) dragging
(d) dropping
(e) keyboard events
(f) resize event
(g) combined mouse-keyboard events
(h) text editing events
(4) stepping
(5) creating new kinds of morphs
(6) development and user modes
(7) turtle graphics
(8) damage list housekeeping
(9) supporting high-resolution "retina" screens
(10) minifying morphic.js
VIII. acknowledgements
IX. contributors
I. hierarchy
-------------
the following tree lists all constructors hierarchically,
indentation indicating inheritance. Refer to this list to get a
contextual overview:
Color
Node
Morph
BlinkerMorph
CursorMorph
BouncerMorph*
BoxMorph
InspectorMorph
MenuMorph
MouseSensorMorph*
SpeechBubbleMorph
CircleBoxMorph
SliderButtonMorph
SliderMorph
ColorPaletteMorph
GrayPaletteMorph
ColorPickerMorph
FrameMorph
ScrollFrameMorph
ListMorph
StringFieldMorph
WorldMorph
HandleMorph
HandMorph
PenMorph
ShadowMorph
StringMorph
TextMorph
TriggerMorph
MenuItemMorph
Point
Rectangle
II. toc
-------
the following list shows the order in which all constructors are
defined. Use this list to locate code in this document:
Global settings
Global functions
Color
Point
Rectangle
Node
Morph
ShadowMorph
HandleMorph
PenMorph
ColorPaletteMorph
GrayPaletteMorph
ColorPickerMorph
BlinkerMorph
CursorMorph
BoxMorph
SpeechBubbleMorph
CircleBoxMorph
SliderButtonMorph
SliderMorph
MouseSensorMorph*
InspectorMorph
MenuMorph
StringMorph
TextMorph
TriggerMorph
MenuItemMorph
FrameMorph
ScrollFrameMorph
ListMorph
StringFieldMorph
BouncerMorph*
HandMorph
WorldMorph
* included only for demo purposes
III. yet to implement
---------------------
- keyboard support for scroll frames and lists
- full keyboard support for menus (partial support exists)
- virtual keyboard support for Android and IE
IV. open issues
----------------
- clipboard support (copy & paste) for non-textual data
V. browser compatibility
------------------------
I have taken great care and considerable effort to make morphic.js
runnable and appearing exactly the same on all current browsers
available to me:
- Firefox for Windows
- Firefox for Mac
- Firefox for Android
- Chrome for Windows
- Chrome for Mac
- Chrome for Android
- Safari for Windows (deprecated)
- safari for Mac
- Safari for iOS (mobile)
- IE for Windows
- Edge for Windows
- Opera for Windows
- Opera for Mac
VI. the big picture
-------------------
Morphic.js is completely based on Canvas and JavaScript, it is just
Morphic, nothing else. Morphic.js is very basic and covers only the
bare essentials:
* a stepping mechanism (a time-sharing multiplexer for lively
user interaction ontop of a single OS/browser thread)
* progressive display updates (only dirty rectangles are
redrawn in each display cycle)
* a tree structure
* a single World per Canvas element (although you can have
multiple worlds in multiple Canvas elements on the same web
page)
* a single Hand per World (but you can support multi-touch
events)
* a single text entry focus per World
In its current state morphic.js doesn't support Transforms (you
cannot rotate Morphs), but with PenMorph there already is a simple
LOGO-like turtle that you can use to draw onto any Morph it is
attached to. I'm planning to add special Morphs that support these
operations later on, but not for every Morph in the system.
Therefore these additions ("sprites" etc.) are likely to be part of
other libraries ("microworld.js") in separate files.
the purpose of morphic.js is to provide a malleable framework that
will let me experiment with lively GUIs for my hobby horse, which
is drag-and-drop, blocks based programming languages. Those things
(BYOB4 - http://byob.berkeley.edu) will be written using morphic.js
as a library.
VII. programming guide
----------------------
Morphic.js provides a library for lively GUIs inside single HTML
Canvas elements. Each such canvas element functions as a "world" in
which other visible shapes ("morphs") can be positioned and
manipulated, often directly and interactively by the user. Morphs
are tree nodes and may contain any number of submorphs ("children").
All things visible in a morphic World are morphs themselves, i.e.
all text rendering, blinking cursors, entry fields, menus, buttons,
sliders, windows and dialog boxes etc. are created with morphic.js
rather than using HTML DOM elements, and as a consequence can be
changed and adjusted by the programmer regardless of proprietary
browser behavior.
Each World has an - invisible - "Hand" resembling the mouse cursor
(or the user's finger on touch screens) which handles mouse events,
and may also have a keyboardReceiver to handle key events.
The basic idea of Morphic is to continuously run display cycles and
to incrementally update the screen by only redrawing those World
regions which have been "dirtied" since the last redraw. Before
each shape is processed for redisplay it gets the chance to perform
a "step" procedure, thus allowing for an illusion of concurrency.
(1) setting up a web page
-------------------------
Setting up a web page for Morphic always involves three steps:
adding one or more Canvas elements, defining one or more worlds,
initializing and starting the main loop.
(a) single world
-----------------
Most commonly you will want your World to fill the browsers's whole
client area. This default situation is easiest and most straight
forward.
example html file:
Morphic!
if you use ScrollFrames or otherwise plan to support mouse wheel
scrolling events, you might also add the following inline-CSS
attribute to the Canvas element:
style="position: absolute;"
which will prevent the World to be scrolled around instead of the
elements inside of it in some browsers.
(b) multiple worlds
-------------------
If you wish to create a web page with more than one world, make
sure to prevent each world from auto-filling the whole page and
include it in the main loop. It's also a good idea to give each
world its own tabindex:
example html file:
Morphic!
first world:
second world:
(c) an application
-------------------
Of course, most of the time you don't want to just plain use the
standard Morphic World "as is" out of the box, but write your own
application (something like Scratch!) in it. For such an
application you'll create your own morph prototypes, perhaps
assemble your own "window frame" and bring it all to life in a
customized World state. the following example creates a simple
snake-like mouse drawing game.
example html file:
touch me!
To get an idea how you can craft your own custom morph prototypes
I've included two examples which should give you an idea how to add
properties, override inherited methods and use the stepping
mechanism for "livelyness":
BouncerMorph
MouseSensorMorph
For the sake of sharing a single file I've included those examples
in morphic.js itself. Usually you'll define your additions in a
separate file and keep morphic.js untouched.
(2) manipulating morphs
-----------------------
There are many methods to programmatically manipulate morphs. Among
the most important and common ones among all morphs are the
following nine:
* hide()
* show()
* setPosition(aPoint)
* setExtent(aPoint)
* setColor(aColor)
* add(submorph) - attaches submorph ontop
* addBack(submorph) - attaches submorph underneath
* fullCopy() - duplication
* destroy() - deletion
(3) events
----------
All user (and system) interaction is triggered by events, which are
passed on from the root element - the World - to its submorphs. The
World contains a list of system (browser) events it reacts to in its
initEventListeners()
method. Currently there are
- mouse
- drop
- keyboard
- (window) resize
events.
These system events are dispatched within the morphic World by the
World's Hand and its keyboardReceiver (usually the active text
cursor).
(a) mouse events:
-----------------
The Hand dispatches the following mouse events to relevant morphs:
mouseDownLeft
mouseDownRight
mouseClickLeft
mouseClickRight
mouseDoubleClick
mouseEnter
mouseLeave
mouseEnterDragging
mouseLeaveDragging
mouseMove
mouseScroll
If you wish your morph to react to any such event, simply add a
method of the same name as the event, e.g:
MyMorph.prototype.mouseMove = function(pos) {};
All of these methods have as optional parameter a Point object
indicating the current position of the Hand inside the World's
coordinate system. The
mouseMove(pos, button)
event method has an additional optional parameter indicating the
currently pressed mouse button, which is either 'left' or 'right'.
You can use this to let users interact with 3D environments.
Events may be "bubbled" up a morph's owner chain by calling
this.escalateEvent(functionName, arg)
in the event handler method's code.
Likewise, removing the event handler method will render your morph
passive to the event in question.
(b) context menu:
-----------------
By default right-clicking (or single-finger tap-and-hold) on a morph
also invokes its context menu (in addition to firing the
mouseClickRight event). A morph's context menu can be customized by
assigning a Menu instance to its
customContextMenu
property, or altogether suppressed by overriding its inherited
contextMenu()
method.
(c) dragging:
-------------
Dragging a morph is initiated when the left mouse button is pressed,
held and the mouse is moved.
You can control whether a morph is draggable by setting its
isDraggable
property either to false or true. If a morph isn't draggable itself
it will pass the pick-up request up its owner chain. This lets you
create draggable composite morphs like Windows, DialogBoxes,
Sliders etc.
Sometimes it is desireable to make "template" shapes which cannot be
moved themselves, but from which instead duplicates can be peeled
off. This is especially useful for building blocks in construction
kits, e.g. the MIT-Scratch palette. Morphic.js lets you control this
functionality by setting the
isTemplate
property flag to true for any morph whose "isDraggable" property is
turned off. When dragging such a Morph the hand will instead grab
a duplicate of the template whose "isDraggable" flag is true and
whose "isTemplate" flag is false, in other words: a non-template.
When creating a copy from a template, the copy's
reactToTemplateCopy
is invoked, if it is present.
Dragging is indicated by adding a drop shadow to the morph in hand.
If a morph follows the hand without displaying a drop shadow it is
merely being moved about without changing its parent (owner morph),
e.g. when "dragging" a morph handle to resize its owner, or when
"dragging" a slider button.
Right before a morph is picked up its
prepareToBeGrabbed(handMorph)
method is invoked, if it is present. Immediately after the pick-up
the former parent's
reactToGrabOf(grabbedMorph)
method is called, again only if it exists.
Similar to events, these methods are optional and don't exist by
default. For a simple example of how they can be used to adjust
scroll bars in a scroll frame please have a look at their
implementation in FrameMorph.
(d) dropping:
-------------
Dropping is triggered when the left mouse button is either pressed
or released while the Hand is dragging a morph.
Dropping a morph causes it to become embedded in a new owner morph.
You can control this embedding behavior by setting the prospective
drop target's
acceptsDrops
property to either true or false, or by overriding its inherited
wantsDropOf(aMorph)
method.
Right after a morph has been dropped its
justDropped(handMorph)
method is called, and its new parent's
reactToDropOf(droppedMorph, handMorph)
method is invoked, again only if each method exists.
Similar to events, these methods are optional and by default are
not present in morphs by default (watch out for inheritance,
though!). For a simple example of how they can be used to adjust
scroll bars in a scroll frame please have a look at their
implementation in FrameMorph.
Drops of image elements from outside the world canvas are dispatched as
droppedImage(aCanvas, name)
droppedSVG(anImage, name)
events to interested Morphs at the mouse pointer. If you want you Morph
to e.g. import outside images you can add the droppedImage() and / or the
droppedSVG() methods to it. The parameter passed to the event handles is
a new offscreen canvas element representing a copy of the original image
element which can be directly used, e.g. by assigning it to another
Morph's image property. In the case of a dropped SVG it is an image
element (not a canvas), which has to be rasterized onto a canvas before
it can be used. The benefit of handling SVGs as image elements is that
rasterization can be deferred until the destination scale is known, taking
advantage of SVG's ability for smooth scaling. If instead SVGs are to be
rasterized right away, you can set the
MorphicPreferences.rasterizeSVGs
preference to . In this case dropped SVGs also trigger the
droppedImage() event with a canvas containing a rasterized version of the
SVG.
The same applies to drops of audio or text files from outside the world
canvas.
Those are dispatched as
droppedAudio(anAudio, name)
droppedText(aString, name)
events to interested Morphs at the mouse pointer.
if none of the above content types can be determined, the file contents
is dispatched as an ArrayBuffer to interested Morphs:
droppedBinary(anArrayBuffer, name)
(e) keyboard events
-------------------
The World dispatches the following key events to its active
keyboardReceiver:
keypress
keydown
keyup
Currently the only morph which acts as keyboard receiver is
CursorMorph, the basic text editing widget. If you wish to add
keyboard support to your morph you need to add event handling
methods for
processKeyPress(event)
processKeyDown(event)
processKeyUp(event)
and activate them by assigning your morph to the World's
keyboardReceiver
property.
Note that processKeyUp() is optional and doesn't have to be present
if your morph doesn't require it.
(f) resize event
----------------
The Window resize event is handled by the World and allows the
World's extent to be adjusted so that it always completely fills
the browser's visible page. You can turn off this default behavior
by setting the World's
useFillPage
property to false.
Alternatively you can also initialize the World with the
useFillPage switch turned off from the beginning by passing the
false value as second parameter to the World's constructor:
world = new World(aCanvas, false);
Use this when creating a web page with multiple Worlds.
if "useFillPage" is turned on the World dispatches an
reactToWorldResize(newBounds)
events to all of its children (toplevel only), allowing each to
adjust to the new World bounds by implementing a corresponding
method, the passed argument being the World's new dimensions after
completing the resize. By default, the "reactToWorldResize" Method
does not exist.
Example:
Add the following method to your Morph to let it automatically
fill the whole World, but leave a 10 pixel border uncovered:
MyMorph.prototype.reactToWorldResize = function (rect) {
this.changed();
this.bounds = rect.insetBy(10);
this.drawNew();
this.changed();
};
(g) combined mouse-keyboard events
----------------------------------
Occasionally you'll want an object to react differently to a mouse
click or to some other mouse event while the user holds down a key
on the keyboard. Such "shift-click", "ctl-click", or "alt-click"
events can be implemented by querying the World's
currentKey
property inside the function that reacts to the mouse event. This
property stores the keyCode of the key that's currently pressed.
Once the key is released by the user it reverts to null.
(h) text editing events
-----------------------
Much of Morphic's "liveliness" comes out of allowing text elements
(instances of either single-lined StringMorph or multi-lined TextMorph)
to be directly manipulated and edited by users. This requires other
objects which may have an interest in the text element's state to react
appropriately. Therefore text elements and their manipulators emit
a stream of events, mostly by "bubbling" them up the text element's
owner chain. Text elements' parents are notified about the following
events:
Whenever the user presses a key on the keyboard while a text element
is being edited, a
reactToKeystroke(event)
is escalated up its parent chain, the "event" parameter being the
original one received by the World.
Once the user has completed the edit, the following events are
dispatched:
accept() - was pressed on a single line of text
cancel() - was pressed on any text element
Note that "accept" only gets triggered by single-line texte elements,
as the key is used to insert line breaks in multi-line
elements. Therefore, whenever a text edit is terminated by the user
(accepted, cancelled or otherwise),
reactToEdit(StringOrTextMorph)
is triggered.
If the MorphicPreference's
useSliderForInput
setting is turned on, a slider is popped up underneath the currently
edited text element letting the user insert numbers out of the given
slider range. Whenever this happens, i.e. whenever the slider is moved
or while the slider button is pressed, a stream of
reactToSliderEdit(StringOrTextMorph)
events is dispatched, allowing for "Bret-Victor" style "live coding"
applications.
In addition to user-initiated events text elements also emit
change notifications to their direct parents whenever their drawNew()
method is invoked. That way complex Morphs containing text elements
get a chance to react if something about the embedded text has been
modified programmatically. These events are:
layoutChanged() - sent from instances of TextMorph
fixLayout() - sent from instances of StringMorph
they are different so that Morphs which contain both multi-line and
single-line text elements can hold them apart.
(4) stepping
------------
Stepping is what makes Morphic "magical". Two properties control
a morph's stepping behavior: the fps attribute and the step()
method.
By default the
step()
method does nothing. As you can see in the examples of BouncerMorph
and MouseSensorMorph you can easily override this inherited method
to suit your needs.
By default the step() method is called once per display cycle.
Depending on the number of actively stepping morphs and the
complexity of your step() methods this can cause quite a strain on
your CPU, and also result in your application behaving differently
on slower computers than on fast ones.
setting
myMorph.fps
to a number lower than the interval for the main loop lets you free
system resources (albeit at the cost of a less responsive or slower
behavior for this particular morph).
(5) creating new kinds of morphs
--------------------------------
The real fun begins when you start to create new kinds of morphs
with customized shapes. Imagine, e.g. jigsaw puzzle pieces or
musical notes. For this you have to override the default
drawNew()
method.
This method creates a new offscreen Canvas and stores it in
the morph's
image
property.
Use the following template for a start:
MyMorph.prototype.drawNew = function() {
var context;
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
// use context to paint stuff here
};
If your new morph stores or references to other morphs outside of
the submorph tree in other properties, be sure to also override the
default
updateReferences()
method if you want it to support duplication.
(6) development and user modes
------------------------------
When working with Squeak on Scratch or BYOB among the features I
like the best and use the most is inspecting what's going on in
the World while it is up and running. That's what development mode
is for (you could also call it debug mode). In essence development
mode controls which context menu shows up. In user mode right
clicking (or double finger tapping) a morph invokes its
customContextMenu
property, whereas in development mode only the general
developersMenu()
method is called and the resulting menu invoked. The developers'
menu features Gui-Builder-wise functionality to directly inspect,
take apart, reassamble and otherwise manipulate morphs and their
contents.
Instead of using the "customContextMenu" property you can also
assign a more dynamic contextMenu by overriding the general
userMenu()
method with a customized menu constructor. The difference between
the customContextMenu property and the userMenu() method is that
the former is also present in development mode and overrides the
developersMenu() result. For an example of how to use the
customContextMenu property have a look at TextMorph's evaluation
menu, which is used for the Inspector's evaluation pane.
When in development mode you can inspect every Morph's properties
with the inspector, including all of its methods. The inspector
also lets you add, remove and rename properties, and even edit
their values at runtime. Like in a Smalltalk environment the inspect
features an evaluation pane into which you can type in arbitrary
JavaScript code and evaluate it in the context of the inspectee.
Use switching between user and development modes while you are
developing an application and disable switching to development once
you're done and deploying, because generally you don't want to
confuse end-users with inspectors and meta-level stuff.
(7) turtle graphics
-------------------
The basic Morphic kernel features a simple LOGO turtle constructor
called
PenMorph
which you can use to draw onto its parent Morph. By default every
Morph in the system (including the World) is able to act as turtle
canvas and can display pen trails. Pen trails will be lost whenever
the trails morph (the pen's parent) performs a "drawNew()"
operation. If you want to create your own pen trails canvas, you
may wish to modify its
penTrails()
property, so that it keeps a separate offscreen canvas for pen
trails (and doesn't loose these on redraw).
the following properties of PenMorph are relevant for turtle
graphics:
color - a Color
size - line width of pen trails
heading - degrees
isDown - drawing state
the following commands can be used to actually draw something:
up() - lift the pen up, further movements leave no trails
down() - set down, further movements leave trails
clear() - remove all trails from the current parent
forward(n) - move n steps in the current direction (heading)
turn(n) - turn right n degrees
Turtle graphics can best be explored interactively by creating a
new PenMorph object and by manipulating it with the inspector
widget.
NOTE: PenMorph has a special optimization for recursive operations
called
warp(function)
You can significantly speed up recursive ops and increase the depth
of recursion that's displayable by wrapping WARP around your
recursive function call:
example:
myPen.warp(function () {
myPen.tree(12, 120, 20);
})
will be much faster than just invoking the tree function, because it
prevents the parent's parent from keeping track of every single line
segment and instead redraws the outcome in a single pass.
(8) damage list housekeeping
----------------------------
Morphic's progressive display update comes at the cost of having to
cycle through a list of "broken rectangles" every display cycle. If
this list gets very long working this damage list can lead to a
seemingly dramatic slow-down of the Morphic system. Typically this
occurs when updating the layout of complex Morphs with very many
submorphs, e.g. when resizing an inspector window.
An effective strategy to cope with this is to use the inherited
trackChanges
property of the Morph prototype for damage list housekeeping.
The trackChanges property of the Morph prototype is a Boolean switch
that determines whether the World's damage list ('broken' rectangles)
tracks changes. By default the switch is always on. If set to false
changes are not stored. This can be very useful for housekeeping of
the damage list in situations where a large number of (sub-) morphs
are changed more or less at once. Instead of keeping track of every
single submorph's changes tremendous performance improvements can be
achieved by setting the trackChanges flag to false before propagating
the layout changes, setting it to true again and then storing the full
bounds of the surrounding morph. As an example refer to the
moveBy()
method of HandMorph, and to the
fixLayout()
method of InspectorMorph, or the
startLayout()
endLayout()
methods of SyntaxElementMorph in the Snap application.
(9) supporting high-resolution "retina" screens
-----------------------------------------------
By default retina support gets installed when Morphic.js loads. There
are two global functions that let you test for retina availability:
isRetinaSupported() - Bool, answers if retina support is available
isRetinaEnabled() - Bool, answers if currently in retina mode
and two more functions that let you control retina support if it is
available:
enableRetinaSupport()
disableRetinaSupport()
Both of these internally test whether retina is available, so they are
safe to call directly. For an example how to make retina support
user-specifiable refer to
Snap! >> guis.js >> toggleRetina()
Even when in retina mode it often makes sense to use normal-resolution
canvasses for simple shapes in order to save system resources and
optimize performance. Examples are costumes and backgrounds in Snap.
In Morphic you can create new canvas elements using
newCanvas(extentPoint [, nonRetinaFlag])
If retina support is enabled such new canvasses will automatically be
high-resolution canvasses, unless the newCanvas() function is given an
otherwise optional second Boolean argument that explicitly makes
it a non-retina canvas.
Not the whole canvas API is supported by Morphic's retina utilities.
Especially if your code uses putImageData() you will want to "downgrade"
a target high-resolution canvas to a normal-resolution ("non-retina")
one before using
normalizeCanvas(aCanvas [, copyFlag])
This will change the target canvas' resolution in place (!). If you
pass in the optional second Boolean flag the function returns
a non-retina copy and leaves the target canvas unchanged. An example
of this normalize mechanism is converting the penTrails layer of Snap's
stage (high-resolution) into a sprite-costume (normal resolution).
(10) minifying morphic.js
-------------------------
Coming from Smalltalk and being a Squeaker at heart I am a huge fan
of browsing the code itself to make sense of it. Therefore I have
included this documentation and (too little) inline comments so all
you need to get going is this very file.
Nowadays with live streaming HD video even on mobile phones 250 KB
shouldn't be a big strain on bandwith, still minifying and even
compressing morphic.js down do about 100 KB may sometimes improve
performance in production use.
Being an attorney-at-law myself you programmer folk keep harassing
me with rabulistic nitpickings about free software licenses. I'm
releasing morphic.js under an AGPL license. Therefore please make
sure to adhere to that license in any minified or compressed version.
VIII. acknowledgements
----------------------
The original Morphic was designed and written by Randy Smith and
John Maloney for the SELF programming language, and later ported to
Squeak (Smalltalk) by John Maloney and Dan Ingalls, who has also
ported it to JavaScript (the Lively Kernel), once again setting
a "Gold Standard" for self sustaining systems which morphic.js
cannot and does not aspire to meet.
This Morphic implementation for JavaScript is not a direct port of
Squeak's Morphic, but still many individual functions have been
ported almost literally from Squeak, sometimes even including their
comments, e.g. the morph duplication mechanism fullCopy(). Squeak
has been a treasure trove, and if morphic.js looks, feels and
smells a lot like Squeak, I'll take it as a compliment.
Evelyn Eastmond has inspired and encouraged me with her wonderful
implementation of DesignBlocksJS. Thanks for sharing code, ideas
and enthusiasm for programming.
John Maloney has been my mentor and my source of inspiration for
these Morphic experiments. Thanks for the critique, the suggestions
and explanations for all things Morphic and for being my all time
programming hero.
I have originally written morphic.js in Florian Balmer's Notepad2
editor for Windows, later switched to Apple's Dashcode and later
still to Apple's Xcode. I've also come to depend on both Douglas
Crockford's JSLint and later the JSHint project, as well as on
Mozilla's Firebug and Google's Chrome to get
it right.
IX. contributors
----------------------
Joe Otto found and fixed many early bugs and taught me some tricks.
Nathan Dinsmore contributed mouse wheel scrolling, cached
background texture handling, countless bug fixes and optimizations.
Ian Reynolds contributed backspace key handling for Chrome.
Davide Della Casa contributed performance optimizations for Firefox.
Jason N (@cyderize) contributed native copy & paste for text editing.
Bartosz Leper contributed retina display support.
- Jens Mönig
*/
// Global settings /////////////////////////////////////////////////////
/*global window, HTMLCanvasElement, FileReader, Audio, FileList*/
var morphicVersion = '2016-October-27';
var modules = {}; // keep track of additional loaded modules
var useBlurredShadows = getBlurredShadowSupport(); // check for Chrome-bug
var standardSettings = {
minimumFontHeight: getMinimumFontHeight(), // browser settings
globalFontFamily: '',
menuFontName: 'sans-serif',
menuFontSize: 12,
bubbleHelpFontSize: 10,
prompterFontName: 'sans-serif',
prompterFontSize: 12,
prompterSliderSize: 10,
handleSize: 15,
scrollBarSize: 12,
mouseScrollAmount: 40,
useSliderForInput: false,
useVirtualKeyboard: true,
isTouchDevice: false, // turned on by touch events, don't set
rasterizeSVGs: false,
isFlat: false,
grabThreshold: 5
};
var touchScreenSettings = {
minimumFontHeight: standardSettings.minimumFontHeight,
globalFontFamily: '',
menuFontName: 'sans-serif',
menuFontSize: 24,
bubbleHelpFontSize: 18,
prompterFontName: 'sans-serif',
prompterFontSize: 24,
prompterSliderSize: 20,
handleSize: 26,
scrollBarSize: 24,
mouseScrollAmount: 40,
useSliderForInput: true,
useVirtualKeyboard: true,
isTouchDevice: false,
rasterizeSVGs: false,
isFlat: false,
grabThreshold: 5
};
var MorphicPreferences = standardSettings;
// first, try enabling support for retina displays - can be turned off later
/*
Support for retina displays has been pioneered and contributed by
Bartosz Leper.
NOTE: this will make changes to the HTMLCanvasElement that - mostly -
make Morphic usable on retina displays in very high resolution mode
with crisp fonts and clear fine lines without you (the programmer)
needing to know any specifics, provided both the display and the browser
support these (Safari currently doesn't), otherwise these utilities will
not be installed.
If you don't want your Morphic application to support retina resolutions
you don't have to edit this morphic.js file to comment out the next line
of code, instead you can simply call
disableRetinaSupport();
before you create your World(s) in the html page. Disabling retina
support also will simply do nothing if retina support is not possible
or already disabled, so it's equally safe to call.
For an example how to make retina support user-specifiable refer to
Snap! >> guis.js >> toggleRetina()
*/
enableRetinaSupport();
// Global Functions ////////////////////////////////////////////////////
function nop() {
// do explicitly nothing
return null;
}
function localize(string) {
// override this function with custom localizations
return string;
}
function isNil(thing) {
return thing === undefined || thing === null;
}
function contains(list, element) {
// answer true if element is a member of list
return list.some(function (any) {
return any === element;
});
}
function detect(list, predicate) {
// answer the first element of list for which predicate evaluates
// true, otherwise answer null
var i, size = list.length;
for (i = 0; i < size; i += 1) {
if (predicate.call(null, list[i])) {
return list[i];
}
}
return null;
}
function sizeOf(object) {
// answer the number of own properties
var size = 0, key;
for (key in object) {
if (Object.prototype.hasOwnProperty.call(object, key)) {
size += 1;
}
}
return size;
}
function isString(target) {
return typeof target === 'string' || target instanceof String;
}
function isObject(target) {
return target !== null &&
(typeof target === 'object' || target instanceof Object);
}
function radians(degrees) {
return degrees * Math.PI / 180;
}
function degrees(radians) {
return radians * 180 / Math.PI;
}
function fontHeight(height) {
var minHeight = Math.max(height, MorphicPreferences.minimumFontHeight);
return minHeight * 1.2; // assuming 1/5 font size for ascenders
}
function isWordChar(aCharacter) {
// can't use \b or \w because they ignore diacritics
return aCharacter.match(/[A-zÀ-ÿ0-9]/);
}
function newCanvas(extentPoint, nonRetina) {
// answer a new empty instance of Canvas, don't display anywhere
// nonRetina - optional Boolean "false"
// by default retina support is automatic
var canvas, ext;
ext = extentPoint || {x: 0, y: 0};
canvas = document.createElement('canvas');
canvas.width = ext.x;
canvas.height = ext.y;
if (nonRetina && canvas.isRetinaEnabled) {
canvas.isRetinaEnabled = false;
}
return canvas;
}
function getMinimumFontHeight() {
// answer the height of the smallest font renderable in pixels
var str = 'I',
size = 50,
canvas = document.createElement('canvas'),
ctx,
maxX,
data,
x,
y;
canvas.width = size;
canvas.height = size;
ctx = canvas.getContext('2d');
ctx.font = '1px serif';
maxX = ctx.measureText(str).width;
ctx.fillStyle = 'black';
ctx.textBaseline = 'bottom';
ctx.fillText(str, 0, size);
for (y = 0; y < size; y += 1) {
for (x = 0; x < maxX; x += 1) {
data = ctx.getImageData(x, y, 1, 1);
if (data.data[3] !== 0) {
return size - y + 1;
}
}
}
return 0;
}
function getBlurredShadowSupport() {
// check for Chrome issue 90001
// http://code.google.com/p/chromium/issues/detail?id=90001
var source, target, ctx;
source = document.createElement('canvas');
source.width = 10;
source.height = 10;
ctx = source.getContext('2d');
ctx.fillStyle = 'rgb(255, 0, 0)';
ctx.beginPath();
ctx.arc(5, 5, 5, 0, Math.PI * 2, true);
ctx.closePath();
ctx.fill();
target = document.createElement('canvas');
target.width = 10;
target.height = 10;
ctx = target.getContext('2d');
ctx.shadowBlur = 10;
ctx.shadowColor = 'rgba(0, 0, 255, 1)';
ctx.drawImage(source, 0, 0);
return ctx.getImageData(0, 0, 1, 1).data[3] ? true : false;
}
function getDocumentPositionOf(aDOMelement) {
// answer the absolute coordinates of a DOM element in the document
var pos, offsetParent;
if (aDOMelement === null) {
return {x: 0, y: 0};
}
pos = {x: aDOMelement.offsetLeft, y: aDOMelement.offsetTop};
offsetParent = aDOMelement.offsetParent;
while (offsetParent !== null) {
pos.x += offsetParent.offsetLeft;
pos.y += offsetParent.offsetTop;
if (offsetParent !== document.body &&
offsetParent !== document.documentElement) {
pos.x -= offsetParent.scrollLeft;
pos.y -= offsetParent.scrollTop;
}
offsetParent = offsetParent.offsetParent;
}
return pos;
}
function copy(target) {
// answer a shallow copy of target
var value, c, property, keys, l, i;
if (typeof target !== 'object') {
return target;
}
value = target.valueOf();
if (target !== value) {
return new target.constructor(value);
}
if (target instanceof target.constructor &&
target.constructor !== Object) {
c = Object.create(target.constructor.prototype);
keys = Object.keys(target);
for (l = keys.length, i = 0; i < l; i += 1) {
property = keys[i];
c[property] = target[property];
}
} else {
c = {};
for (property in target) {
c[property] = target[property];
}
}
return c;
}
// Retina Display Support //////////////////////////////////////////////
/*
By default retina support gets installed when Morphic.js loads. There
are two global functions that let you test for retina availability:
isRetinaSupported() - Boolean, whether retina support is available
isRetinaEnabled() - Boolean, whether currently in retina mode
and two more functions that let you control retina support if it is
available:
enableRetinaSupport()
disableRetinaSupport()
Both of these internally test whether retina is available, so they are
safe to call directly.
Even when in retina mode it often makes sense to use non-high-resolution
canvasses for simple shapes in order to save system resources and
optimize performance. Examples are costumes and backgrounds in Snap.
In Morphic you can create new canvas elements using
newCanvas(extentPoint [, nonRetinaFlag])
If retina support is enabled such new canvasses will automatically be
high-resolution canvasses, unless the newCanvas() function is given an
otherwise optional second Boolean argument that explicitly makes
it a non-retina canvas.
Not the whole canvas API is supported by Morphic's retina utilities.
Especially if your code uses putImageData() you will want to "downgrade"
a target high-resolution canvas to a normal-resolution ("non-retina")
one before using
normalizeCanvas(aCanvas [, copyFlag])
This will change the target canvas' resolution in place (!). If you
pass in the optional second Boolean flag the function returns
a non-retina copy and leaves the target canvas unchanged. An example
of this normalize mechanism is converting the penTrails layer of Snap's
stage (high-resolution) into a sprite-costume (normal resolution).
*/
function enableRetinaSupport() {
/*
=== contributed by Bartosz Leper ===
This installs a series of utilities that allow using Canvas the same way
on retina and non-retina displays. If the display is a retina one, the
underlying dimensions of the Canvas elements are doubled, but this will
be transparent to the code that uses Canvas. All dimensions read or
written to the Canvas element will be scaled appropriately.
NOTE: This implementation is not exhaustive; it only implements what is
needed by the Snap! UI.
[Jens]: like all other retina screen support implementations I've seen
Bartosz's patch also does not address putImageData() compatibility when
mixing retina-enabled and non-retina canvasses. If you need to manipulate
pixels in such mixed canvasses, make sure to "downgrade" them all using
normalizeCanvas() below.
*/
// Get the window's pixel ratio for canvas elements.
// See: http://www.html5rocks.com/en/tutorials/canvas/hidpi/
var ctx = document.createElement("canvas").getContext("2d"),
backingStorePixelRatio = ctx.webkitBackingStorePixelRatio ||
ctx.mozBackingStorePixelRatio ||
ctx.msBackingStorePixelRatio ||
ctx.oBackingStorePixelRatio ||
ctx.backingStorePixelRatio || 1,
// Unfortunately, it's really hard to make this work well when changing
// zoom level, so let's leave it like this right now, and stick to
// whatever the ratio was in the beginning.
// originalDevicePixelRatio = window.devicePixelRatio,
// [Jens]: As of summer 2016 non-integer devicePixelRatios lead to
// artifacts when blitting images onto canvas elements in all browsers
// except Chrome, especially Firefox, Edge, IE (Safari doesn't even
// support retina mode as implemented here).
// therefore - to ensure crisp fonts - use the ceiling of whatever
// the devicePixelRatio is. This needs more memory, but looks nicer.
originalDevicePixelRatio = Math.ceil(window.devicePixelRatio),
canvasProto = HTMLCanvasElement.prototype,
contextProto = CanvasRenderingContext2D.prototype,
// [Jens]: keep track of original properties in a dictionary
// so they can be iterated over and restored
uber = {
drawImage: contextProto.drawImage,
getImageData: contextProto.getImageData,
width: Object.getOwnPropertyDescriptor(
canvasProto,
'width'
),
height: Object.getOwnPropertyDescriptor(
canvasProto,
'height'
),
shadowOffsetX: Object.getOwnPropertyDescriptor(
contextProto,
'shadowOffsetX'
),
shadowOffsetY: Object.getOwnPropertyDescriptor(
contextProto,
'shadowOffsetY'
),
shadowBlur: Object.getOwnPropertyDescriptor(
contextProto,
'shadowBlur'
)
};
// [Jens]: only install retina utilities if the display supports them
if (backingStorePixelRatio === originalDevicePixelRatio) {return; }
// [Jens]: check whether properties can be overridden, needed for Safari
if (Object.keys(uber).some(function (any) {
var prop = uber[any];
return prop.hasOwnProperty('configurable') && (!prop.configurable);
})) {return; }
function getPixelRatio(imageSource) {
return imageSource.isRetinaEnabled ?
(originalDevicePixelRatio || 1) / backingStorePixelRatio : 1;
}
canvasProto._isRetinaEnabled = true;
// [Jens]: remember the original non-retina properties,
// so they can be restored again
canvasProto._bak = uber;
Object.defineProperty(canvasProto, 'isRetinaEnabled', {
get: function() {
return this._isRetinaEnabled;
},
set: function(enabled) {
var prevPixelRatio = getPixelRatio(this);
var prevWidth = this.width;
var prevHeight = this.height;
this._isRetinaEnabled = enabled;
if (getPixelRatio(this) != prevPixelRatio) {
this.width = prevWidth;
this.height = prevHeight;
}
},
configurable: true // [Jens]: allow to be deleted an reconfigured
});
Object.defineProperty(canvasProto, 'width', {
get: function() {
return uber.width.get.call(this) / getPixelRatio(this);
},
set: function(width) {
var pixelRatio = getPixelRatio(this);
uber.width.set.call(this, width * pixelRatio);
var context = this.getContext('2d');
context.restore();
context.save();
context.scale(pixelRatio, pixelRatio);
}
});
Object.defineProperty(canvasProto, 'height', {
get: function() {
return uber.height.get.call(this) / getPixelRatio(this);
},
set: function(height) {
var pixelRatio = getPixelRatio(this);
uber.height.set.call(this, height * pixelRatio);
var context = this.getContext('2d');
context.restore();
context.save();
context.scale(pixelRatio, pixelRatio);
}
});
contextProto.drawImage = function(image) {
var pixelRatio = getPixelRatio(image),
sx, sy, sWidth, sHeight, dx, dy, dWidth, dHeight;
// Different signatures of drawImage() method have different
// parameter assignments.
switch (arguments.length) {
case 9:
sx = arguments[1];
sy = arguments[2];
sWidth = arguments[3];
sHeight = arguments[4];
dx = arguments[5];
dy = arguments[6];
dWidth = arguments[7];
dHeight = arguments[8];
break;
case 5:
sx = 0;
sy = 0;
sWidth = image.width;
sHeight = image.height;
dx = arguments[1];
dy = arguments[2];
dWidth = arguments[3];
dHeight = arguments[4];
break;
case 3:
sx = 0;
sy = 0;
sWidth = image.width;
sHeight = image.height;
dx = arguments[1];
dy = arguments[2];
dWidth = image.width;
dHeight = image.height;
break;
default:
throw Error('Called drawImage() with ' + arguments.length +
' arguments');
}
uber.drawImage.call(
this, image,
sx * pixelRatio, sy * pixelRatio,
sWidth * pixelRatio, sHeight * pixelRatio,
dx, dy,
dWidth, dHeight);
};
contextProto.getImageData = function(sx, sy, sw, sh) {
var pixelRatio = getPixelRatio(this.canvas);
return uber.getImageData.call(
this,
sx * pixelRatio, sy * pixelRatio,
sw * pixelRatio, sh * pixelRatio);
};
Object.defineProperty(contextProto, 'shadowOffsetX', {
get: function() {
return uber.shadowOffsetX.get.call(this) /
getPixelRatio(this.canvas);
},
set: function(offset) {
var pixelRatio = getPixelRatio(this.canvas);
uber.shadowOffsetX.set.call(this, offset * pixelRatio);
}
});
Object.defineProperty(contextProto, 'shadowOffsetY', {
get: function() {
return uber.shadowOffsetY.get.call(this) /
getPixelRatio(this.canvas);
},
set: function(offset) {
var pixelRatio = getPixelRatio(this.canvas);
uber.shadowOffsetY.set.call(this, offset * pixelRatio);
}
});
Object.defineProperty(contextProto, 'shadowBlur', {
get: function() {
return uber.shadowBlur.get.call(this) /
getPixelRatio(this.canvas);
},
set: function(blur) {
var pixelRatio = getPixelRatio(this.canvas);
uber.shadowBlur.set.call(this, blur * pixelRatio);
}
});
}
function isRetinaSupported () {
var ctx = document.createElement("canvas").getContext("2d"),
backingStorePixelRatio = ctx.webkitBackingStorePixelRatio ||
ctx.mozBackingStorePixelRatio ||
ctx.msBackingStorePixelRatio ||
ctx.oBackingStorePixelRatio ||
ctx.backingStorePixelRatio || 1,
canvasProto = HTMLCanvasElement.prototype,
contextProto = CanvasRenderingContext2D.prototype,
uber = {
drawImage: contextProto.drawImage,
getImageData: contextProto.getImageData,
width: Object.getOwnPropertyDescriptor(
canvasProto,
'width'
),
height: Object.getOwnPropertyDescriptor(
canvasProto,
'height'
),
shadowOffsetX: Object.getOwnPropertyDescriptor(
contextProto,
'shadowOffsetX'
),
shadowOffsetY: Object.getOwnPropertyDescriptor(
contextProto,
'shadowOffsetY'
),
shadowBlur: Object.getOwnPropertyDescriptor(
contextProto,
'shadowBlur'
)
};
return backingStorePixelRatio !== window.devicePixelRatio &&
!(Object.keys(uber).some(function (any) {
var prop = uber[any];
return prop.hasOwnProperty('configurable') && (!prop.configurable);
})
);
}
function isRetinaEnabled () {
return HTMLCanvasElement.prototype.hasOwnProperty('_isRetinaEnabled');
}
function disableRetinaSupport() {
// uninstalls Retina utilities. Make sure to re-create every Canvas
// element afterwards
var canvasProto, contextProto, uber;
if (!isRetinaEnabled()) {return; }
canvasProto = HTMLCanvasElement.prototype;
contextProto = CanvasRenderingContext2D.prototype;
uber = canvasProto._bak;
Object.defineProperty(canvasProto, 'width', uber.width);
Object.defineProperty(canvasProto, 'height', uber.height);
contextProto.drawImage = uber.drawImage;
contextProto.getImageData = uber.getImageData;
Object.defineProperty(contextProto, 'shadowOffsetX', uber.shadowOffsetX);
Object.defineProperty(contextProto, 'shadowOffsetY', uber.shadowOffsetY);
Object.defineProperty(contextProto, 'shadowBlur', uber.shadowBlur);
delete canvasProto._isRetinaEnabled;
delete canvasProto.isRetinaEnabled;
delete canvasProto._bak;
}
function normalizeCanvas(aCanvas, getCopy) {
// make sure aCanvas is non-retina, otherwise convert it in place (!)
// or answer a normalized copy if the "getCopy" flag is
var cpy;
if (!aCanvas.isRetinaEnabled) {return aCanvas; }
cpy = newCanvas(new Point(aCanvas.width, aCanvas.height), true);
cpy.getContext('2d').drawImage(aCanvas, 0, 0);
if (getCopy) {return cpy; }
aCanvas.isRetinaEnabled = false;
aCanvas.width = cpy.width;
aCanvas.height = cpy.height;
aCanvas.getContext('2d').drawImage(cpy, 0, 0);
return aCanvas;
}
// Colors //////////////////////////////////////////////////////////////
// Color instance creation:
function Color(r, g, b, a) {
// all values are optional, just (r, g, b) is fine
this.r = r || 0;
this.g = g || 0;
this.b = b || 0;
this.a = a || ((a === 0) ? 0 : 1);
}
// Color string representation: e.g. 'rgba(255,165,0,1)'
Color.prototype.toString = function () {
return 'rgba(' +
Math.round(this.r) + ',' +
Math.round(this.g) + ',' +
Math.round(this.b) + ',' +
this.a + ')';
};
// Color copying:
Color.prototype.copy = function () {
return new Color(
this.r,
this.g,
this.b,
this.a
);
};
// Color comparison:
Color.prototype.eq = function (aColor) {
// ==
return aColor &&
this.r === aColor.r &&
this.g === aColor.g &&
this.b === aColor.b;
};
// Color conversion (hsv):
Color.prototype.hsv = function () {
// ignore alpha
var max, min, h, s, v, d,
rr = this.r / 255,
gg = this.g / 255,
bb = this.b / 255;
max = Math.max(rr, gg, bb);
min = Math.min(rr, gg, bb);
h = max;
s = max;
v = max;
d = max - min;
s = max === 0 ? 0 : d / max;
if (max === min) {
h = 0;
} else {
switch (max) {
case rr:
h = (gg - bb) / d + (gg < bb ? 6 : 0);
break;
case gg:
h = (bb - rr) / d + 2;
break;
case bb:
h = (rr - gg) / d + 4;
break;
}
h /= 6;
}
return [h, s, v];
};
Color.prototype.set_hsv = function (h, s, v) {
// ignore alpha, h, s and v are to be within [0, 1]
var i, f, p, q, t;
i = Math.floor(h * 6);
f = h * 6 - i;
p = v * (1 - s);
q = v * (1 - f * s);
t = v * (1 - (1 - f) * s);
switch (i % 6) {
case 0:
this.r = v;
this.g = t;
this.b = p;
break;
case 1:
this.r = q;
this.g = v;
this.b = p;
break;
case 2:
this.r = p;
this.g = v;
this.b = t;
break;
case 3:
this.r = p;
this.g = q;
this.b = v;
break;
case 4:
this.r = t;
this.g = p;
this.b = v;
break;
case 5:
this.r = v;
this.g = p;
this.b = q;
break;
}
this.r *= 255;
this.g *= 255;
this.b *= 255;
};
// Color mixing:
Color.prototype.mixed = function (proportion, otherColor) {
// answer a copy of this color mixed with another color, ignore alpha
var frac1 = Math.min(Math.max(proportion, 0), 1),
frac2 = 1 - frac1;
return new Color(
this.r * frac1 + otherColor.r * frac2,
this.g * frac1 + otherColor.g * frac2,
this.b * frac1 + otherColor.b * frac2
);
};
Color.prototype.darker = function (percent) {
// return an rgb-interpolated darker copy of me, ignore alpha
var fract = 0.8333;
if (percent) {
fract = (100 - percent) / 100;
}
return this.mixed(fract, new Color(0, 0, 0));
};
Color.prototype.lighter = function (percent) {
// return an rgb-interpolated lighter copy of me, ignore alpha
var fract = 0.8333;
if (percent) {
fract = (100 - percent) / 100;
}
return this.mixed(fract, new Color(255, 255, 255));
};
Color.prototype.dansDarker = function () {
// return an hsv-interpolated darker copy of me, ignore alpha
var hsv = this.hsv(),
result = new Color(),
vv = Math.max(hsv[2] - 0.16, 0);
result.set_hsv(hsv[0], hsv[1], vv);
return result;
};
// Points //////////////////////////////////////////////////////////////
// Point instance creation:
function Point(x, y) {
this.x = x || 0;
this.y = y || 0;
}
// Point string representation: e.g. '12@68'
Point.prototype.toString = function () {
return Math.round(this.x.toString()) +
'@' + Math.round(this.y.toString());
};
// Point copying:
Point.prototype.copy = function () {
return new Point(this.x, this.y);
};
// Point comparison:
Point.prototype.eq = function (aPoint) {
// ==
return this.x === aPoint.x && this.y === aPoint.y;
};
Point.prototype.lt = function (aPoint) {
// <
return this.x < aPoint.x && this.y < aPoint.y;
};
Point.prototype.gt = function (aPoint) {
// >
return this.x > aPoint.x && this.y > aPoint.y;
};
Point.prototype.ge = function (aPoint) {
// >=
return this.x >= aPoint.x && this.y >= aPoint.y;
};
Point.prototype.le = function (aPoint) {
// <=
return this.x <= aPoint.x && this.y <= aPoint.y;
};
Point.prototype.max = function (aPoint) {
return new Point(Math.max(this.x, aPoint.x),
Math.max(this.y, aPoint.y));
};
Point.prototype.min = function (aPoint) {
return new Point(Math.min(this.x, aPoint.x),
Math.min(this.y, aPoint.y));
};
// Point conversion:
Point.prototype.round = function () {
return new Point(Math.round(this.x), Math.round(this.y));
};
Point.prototype.abs = function () {
return new Point(Math.abs(this.x), Math.abs(this.y));
};
Point.prototype.neg = function () {
return new Point(-this.x, -this.y);
};
Point.prototype.mirror = function () {
return new Point(this.y, this.x);
};
Point.prototype.floor = function () {
return new Point(
Math.max(Math.floor(this.x), 0),
Math.max(Math.floor(this.y), 0)
);
};
Point.prototype.ceil = function () {
return new Point(Math.ceil(this.x), Math.ceil(this.y));
};
// Point arithmetic:
Point.prototype.add = function (other) {
if (other instanceof Point) {
return new Point(this.x + other.x, this.y + other.y);
}
return new Point(this.x + other, this.y + other);
};
Point.prototype.subtract = function (other) {
if (other instanceof Point) {
return new Point(this.x - other.x, this.y - other.y);
}
return new Point(this.x - other, this.y - other);
};
Point.prototype.multiplyBy = function (other) {
if (other instanceof Point) {
return new Point(this.x * other.x, this.y * other.y);
}
return new Point(this.x * other, this.y * other);
};
Point.prototype.divideBy = function (other) {
if (other instanceof Point) {
return new Point(this.x / other.x, this.y / other.y);
}
return new Point(this.x / other, this.y / other);
};
Point.prototype.floorDivideBy = function (other) {
if (other instanceof Point) {
return new Point(Math.floor(this.x / other.x),
Math.floor(this.y / other.y));
}
return new Point(Math.floor(this.x / other),
Math.floor(this.y / other));
};
// Point polar coordinates:
Point.prototype.r = function () {
var t = (this.multiplyBy(this));
return Math.sqrt(t.x + t.y);
};
Point.prototype.degrees = function () {
/*
answer the angle I make with origin in degrees.
Right is 0, down is 90
*/
var tan, theta;
if (this.x === 0) {
if (this.y >= 0) {
return 90;
}
return 270;
}
tan = this.y / this.x;
theta = Math.atan(tan);
if (this.x >= 0) {
if (this.y >= 0) {
return degrees(theta);
}
return 360 + (degrees(theta));
}
return 180 + degrees(theta);
};
Point.prototype.theta = function () {
/*
answer the angle I make with origin in radians.
Right is 0, down is 90
*/
var tan, theta;
if (this.x === 0) {
if (this.y >= 0) {
return radians(90);
}
return radians(270);
}
tan = this.y / this.x;
theta = Math.atan(tan);
if (this.x >= 0) {
if (this.y >= 0) {
return theta;
}
return radians(360) + theta;
}
return radians(180) + theta;
};
// Point functions:
Point.prototype.crossProduct = function (aPoint) {
return this.multiplyBy(aPoint.mirror());
};
Point.prototype.distanceTo = function (aPoint) {
return (aPoint.subtract(this)).r();
};
Point.prototype.rotate = function (direction, center) {
// direction must be 'right', 'left' or 'pi'
var offset = this.subtract(center);
if (direction === 'right') {
return new Point(-offset.y, offset.y).add(center);
}
if (direction === 'left') {
return new Point(offset.y, -offset.y).add(center);
}
// direction === 'pi'
return center.subtract(offset);
};
Point.prototype.flip = function (direction, center) {
// direction must be 'vertical' or 'horizontal'
if (direction === 'vertical') {
return new Point(this.x, center.y * 2 - this.y);
}
// direction === 'horizontal'
return new Point(center.x * 2 - this.x, this.y);
};
Point.prototype.distanceAngle = function (dist, angle) {
var deg = angle, x, y;
if (deg > 270) {
deg = deg - 360;
} else if (deg < -270) {
deg = deg + 360;
}
if (-90 <= deg && deg <= 90) {
x = Math.sin(radians(deg)) * dist;
y = Math.sqrt((dist * dist) - (x * x));
return new Point(x + this.x, this.y - y);
}
x = Math.sin(radians(180 - deg)) * dist;
y = Math.sqrt((dist * dist) - (x * x));
return new Point(x + this.x, this.y + y);
};
// Point transforming:
Point.prototype.scaleBy = function (scalePoint) {
return this.multiplyBy(scalePoint);
};
Point.prototype.translateBy = function (deltaPoint) {
return this.add(deltaPoint);
};
Point.prototype.rotateBy = function (angle, centerPoint) {
var center = centerPoint || new Point(0, 0),
p = this.subtract(center),
r = p.r(),
theta = angle - p.theta();
return new Point(
center.x + (r * Math.cos(theta)),
center.y - (r * Math.sin(theta))
);
};
// Point conversion:
Point.prototype.asArray = function () {
return [this.x, this.y];
};
// Rectangles //////////////////////////////////////////////////////////
// Rectangle instance creation:
function Rectangle(left, top, right, bottom) {
this.init(new Point((left || 0), (top || 0)),
new Point((right || 0), (bottom || 0)));
}
Rectangle.prototype.init = function (originPoint, cornerPoint) {
this.origin = originPoint;
this.corner = cornerPoint;
};
// Rectangle string representation: e.g. '[0@0 | 160@80]'
Rectangle.prototype.toString = function () {
return '[' + this.origin.toString() + ' | ' +
this.extent().toString() + ']';
};
// Rectangle copying:
Rectangle.prototype.copy = function () {
return new Rectangle(
this.left(),
this.top(),
this.right(),
this.bottom()
);
};
// creating Rectangle instances from Points:
Point.prototype.corner = function (cornerPoint) {
// answer a new Rectangle
return new Rectangle(
this.x,
this.y,
cornerPoint.x,
cornerPoint.y
);
};
Point.prototype.rectangle = function (aPoint) {
// answer a new Rectangle
var org, crn;
org = this.min(aPoint);
crn = this.max(aPoint);
return new Rectangle(org.x, org.y, crn.x, crn.y);
};
Point.prototype.extent = function (aPoint) {
//answer a new Rectangle
var crn = this.add(aPoint);
return new Rectangle(this.x, this.y, crn.x, crn.y);
};
// Rectangle accessing - setting:
Rectangle.prototype.setTo = function (left, top, right, bottom) {
// note: all inputs are optional and can be omitted
this.origin = new Point(
left || ((left === 0) ? 0 : this.left()),
top || ((top === 0) ? 0 : this.top())
);
this.corner = new Point(
right || ((right === 0) ? 0 : this.right()),
bottom || ((bottom === 0) ? 0 : this.bottom())
);
};
// Rectangle accessing - getting:
Rectangle.prototype.area = function () {
//requires width() and height() to be defined
var w = this.width();
if (w < 0) {
return 0;
}
return Math.max(w * this.height(), 0);
};
Rectangle.prototype.bottom = function () {
return this.corner.y;
};
Rectangle.prototype.bottomCenter = function () {
return new Point(this.center().x, this.bottom());
};
Rectangle.prototype.bottomLeft = function () {
return new Point(this.origin.x, this.corner.y);
};
Rectangle.prototype.bottomRight = function () {
return this.corner.copy();
};
Rectangle.prototype.boundingBox = function () {
return this;
};
Rectangle.prototype.center = function () {
return this.origin.add(
this.corner.subtract(this.origin).floorDivideBy(2)
);
};
Rectangle.prototype.corners = function () {
return [this.origin,
this.bottomLeft(),
this.corner,
this.topRight()];
};
Rectangle.prototype.extent = function () {
return this.corner.subtract(this.origin);
};
Rectangle.prototype.height = function () {
return this.corner.y - this.origin.y;
};
Rectangle.prototype.left = function () {
return this.origin.x;
};
Rectangle.prototype.leftCenter = function () {
return new Point(this.left(), this.center().y);
};
Rectangle.prototype.right = function () {
return this.corner.x;
};
Rectangle.prototype.rightCenter = function () {
return new Point(this.right(), this.center().y);
};
Rectangle.prototype.top = function () {
return this.origin.y;
};
Rectangle.prototype.topCenter = function () {
return new Point(this.center().x, this.top());
};
Rectangle.prototype.topLeft = function () {
return this.origin;
};
Rectangle.prototype.topRight = function () {
return new Point(this.corner.x, this.origin.y);
};
Rectangle.prototype.width = function () {
return this.corner.x - this.origin.x;
};
Rectangle.prototype.position = function () {
return this.origin;
};
// Rectangle comparison:
Rectangle.prototype.eq = function (aRect) {
return this.origin.eq(aRect.origin) &&
this.corner.eq(aRect.corner);
};
Rectangle.prototype.abs = function () {
var newOrigin, newCorner;
newOrigin = this.origin.abs();
newCorner = this.corner.max(newOrigin);
return newOrigin.corner(newCorner);
};
// Rectangle functions:
Rectangle.prototype.insetBy = function (delta) {
// delta can be either a Point or a Number
var result = new Rectangle();
result.origin = this.origin.add(delta);
result.corner = this.corner.subtract(delta);
return result;
};
Rectangle.prototype.expandBy = function (delta) {
// delta can be either a Point or a Number
var result = new Rectangle();
result.origin = this.origin.subtract(delta);
result.corner = this.corner.add(delta);
return result;
};
Rectangle.prototype.growBy = function (delta) {
// delta can be either a Point or a Number
var result = new Rectangle();
result.origin = this.origin.copy();
result.corner = this.corner.add(delta);
return result;
};
Rectangle.prototype.intersect = function (aRect) {
var result = new Rectangle();
result.origin = this.origin.max(aRect.origin);
result.corner = this.corner.min(aRect.corner);
return result;
};
Rectangle.prototype.merge = function (aRect) {
var result = new Rectangle();
result.origin = this.origin.min(aRect.origin);
result.corner = this.corner.max(aRect.corner);
return result;
};
Rectangle.prototype.mergeWith = function (aRect) {
// mutates myself
this.origin = this.origin.min(aRect.origin);
this.corner = this.corner.max(aRect.corner);
};
Rectangle.prototype.round = function () {
return this.origin.round().corner(this.corner.round());
};
Rectangle.prototype.spread = function () {
// round me by applying floor() to my origin and ceil() to my corner
// expand by 1 to be on the safe side, this eliminates rounding
// artifacts caused by Safari's auto-scaling on retina displays
return this.origin.floor().corner(this.corner.ceil()).expandBy(1);
};
Rectangle.prototype.amountToTranslateWithin = function (aRect) {
/*
Answer a Point, delta, such that self + delta is forced within
aRectangle. when all of me cannot be made to fit, prefer to keep
my topLeft inside. Taken from Squeak.
*/
var dx = 0, dy = 0;
if (this.right() > aRect.right()) {
dx = aRect.right() - this.right();
}
if (this.bottom() > aRect.bottom()) {
dy = aRect.bottom() - this.bottom();
}
if ((this.left() + dx) < aRect.left()) {
dx = aRect.left() - this.left();
}
if ((this.top() + dy) < aRect.top()) {
dy = aRect.top() - this.top();
}
return new Point(dx, dy);
};
// Rectangle testing:
Rectangle.prototype.containsPoint = function (aPoint) {
return this.origin.le(aPoint) && aPoint.lt(this.corner);
};
Rectangle.prototype.containsRectangle = function (aRect) {
return aRect.origin.gt(this.origin) &&
aRect.corner.lt(this.corner);
};
Rectangle.prototype.intersects = function (aRect) {
var ro = aRect.origin, rc = aRect.corner;
return (rc.x >= this.origin.x) &&
(rc.y >= this.origin.y) &&
(ro.x <= this.corner.x) &&
(ro.y <= this.corner.y);
};
Rectangle.prototype.isNearTo = function (aRect, threshold) {
var ro = aRect.origin, rc = aRect.corner, border = threshold || 0;
return (rc.x + border >= this.origin.x) &&
(rc.y + border >= this.origin.y) &&
(ro.x - border <= this.corner.x) &&
(ro.y - border <= this.corner.y);
};
// Rectangle transforming:
Rectangle.prototype.scaleBy = function (scale) {
// scale can be either a Point or a scalar
var o = this.origin.multiplyBy(scale),
c = this.corner.multiplyBy(scale);
return new Rectangle(o.x, o.y, c.x, c.y);
};
Rectangle.prototype.translateBy = function (factor) {
// factor can be either a Point or a scalar
var o = this.origin.add(factor),
c = this.corner.add(factor);
return new Rectangle(o.x, o.y, c.x, c.y);
};
// Rectangle converting:
Rectangle.prototype.asArray = function () {
return [this.left(), this.top(), this.right(), this.bottom()];
};
Rectangle.prototype.asArray_xywh = function () {
return [this.left(), this.top(), this.width(), this.height()];
};
// Nodes ///////////////////////////////////////////////////////////////
// Node instance creation:
function Node(parent, childrenArray) {
this.init(parent || null, childrenArray || []);
}
Node.prototype.init = function (parent, childrenArray) {
this.parent = parent || null;
this.children = childrenArray || [];
};
// Node string representation: e.g. 'a Node[3]'
Node.prototype.toString = function () {
return 'a Node' + '[' + this.children.length.toString() + ']';
};
// Node accessing:
Node.prototype.addChild = function (aNode) {
this.children.push(aNode);
aNode.parent = this;
};
Node.prototype.addChildFirst = function (aNode) {
this.children.splice(0, null, aNode);
aNode.parent = this;
};
Node.prototype.removeChild = function (aNode) {
var idx = this.children.indexOf(aNode);
if (idx !== -1) {
this.children.splice(idx, 1);
}
};
// Node functions:
Node.prototype.root = function () {
if (this.parent === null) {
return this;
}
return this.parent.root();
};
Node.prototype.depth = function () {
if (this.parent === null) {
return 0;
}
return this.parent.depth() + 1;
};
Node.prototype.allChildren = function () {
// includes myself
var result = [this];
this.children.forEach(function (child) {
result = result.concat(child.allChildren());
});
return result;
};
Node.prototype.forAllChildren = function (aFunction) {
if (this.children.length > 0) {
this.children.forEach(function (child) {
child.forAllChildren(aFunction);
});
}
aFunction.call(null, this);
};
Node.prototype.anyChild = function (aPredicate) {
// includes myself
var i;
if (aPredicate.call(null, this)) {
return true;
}
for (i = 0; i < this.children.length; i += 1) {
if (this.children[i].anyChild(aPredicate)) {
return true;
}
}
return false;
};
Node.prototype.allLeafs = function () {
var result = [];
this.allChildren().forEach(function (element) {
if (element.children.length === 0) {
result.push(element);
}
});
return result;
};
Node.prototype.allParents = function () {
// includes myself
var result = [this];
if (this.parent !== null) {
result = result.concat(this.parent.allParents());
}
return result;
};
Node.prototype.siblings = function () {
var myself = this;
if (this.parent === null) {
return [];
}
return this.parent.children.filter(function (child) {
return child !== myself;
});
};
Node.prototype.parentThatIsA = function (constructor) {
// including myself
if (this instanceof constructor) {
return this;
}
if (!this.parent) {
return null;
}
return this.parent.parentThatIsA(constructor);
};
Node.prototype.parentThatIsAnyOf = function (constructors) {
// including myself
var yup = false,
myself = this;
constructors.forEach(function (each) {
if (myself.constructor === each) {
yup = true;
return;
}
});
if (yup) {
return this;
}
if (!this.parent) {
return null;
}
return this.parent.parentThatIsAnyOf(constructors);
};
// Morphs //////////////////////////////////////////////////////////////
// Morph: referenced constructors
var Morph;
var WorldMorph;
var HandMorph;
var ShadowMorph;
var FrameMorph;
var MenuMorph;
var HandleMorph;
var StringFieldMorph;
var ColorPickerMorph;
var SliderMorph;
var ScrollFrameMorph;
var InspectorMorph;
var StringMorph;
var TextMorph;
// Morph inherits from Node:
Morph.prototype = new Node();
Morph.prototype.constructor = Morph;
Morph.uber = Node.prototype;
// Morph settings:
/*
damage list housekeeping
the trackChanges property of the Morph prototype is a Boolean switch
that determines whether the World's damage list ('broken' rectangles)
tracks changes. By default the switch is always on. If set to false
changes are not stored. This can be very useful for housekeeping of
the damage list in situations where a large number of (sub-) morphs
are changed more or less at once. Instead of keeping track of every
single submorph's changes tremendous performance improvements can be
achieved by setting the trackChanges flag to false before propagating
the layout changes, setting it to true again and then storing the full
bounds of the surrounding morph. As an example refer to the
fixLayout()
method of InspectorMorph, or the
startLayout()
endLayout()
methods of SyntaxElementMorph in the Snap application.
*/
Morph.prototype.trackChanges = true;
Morph.prototype.shadowBlur = 4;
// Morph instance creation:
function Morph() {
this.init();
}
// Morph initialization:
Morph.prototype.init = function (noDraw) {
Morph.uber.init.call(this);
this.isMorph = true;
this.image = null;
this.bounds = new Rectangle(0, 0, 50, 40);
this.cachedFullImage = null;
this.cachedFullBounds = null;
this.color = new Color(80, 80, 80);
this.texture = null; // optional url of a fill-image
this.cachedTexture = null; // internal cache of actual bg image
this.alpha = 1;
this.isVisible = true;
this.isDraggable = false;
this.isTemplate = false;
this.acceptsDrops = false;
this.noticesTransparentClick = false;
if (!noDraw) {this.drawNew(); }
this.fps = 0;
this.customContextMenu = null;
this.lastTime = Date.now();
this.onNextStep = null; // optional function to be run once
};
// Morph string representation: e.g. 'a Morph 2 [20@45 | 130@250]'
Morph.prototype.toString = function () {
return 'a ' +
(this.constructor.name ||
this.constructor.toString().split(' ')[1].split('(')[0]) +
' ' +
this.children.length.toString() + ' ' +
this.bounds;
};
// Morph deleting:
Morph.prototype.destroy = function () {
if (this.parent !== null) {
this.fullChanged();
this.parent.removeChild(this);
}
};
// Morph stepping:
Morph.prototype.stepFrame = function () {
if (!this.step) {
return null;
}
var current, elapsed, leftover, nxt;
current = Date.now();
elapsed = current - this.lastTime;
if (this.fps > 0) {
leftover = (1000 / this.fps) - elapsed;
} else {
leftover = 0;
}
if (leftover < 1) {
this.lastTime = current;
if (this.onNextStep) {
nxt = this.onNextStep;
this.onNextStep = null;
nxt.call(this);
}
this.step();
this.children.forEach(function (child) {
child.stepFrame();
});
}
};
Morph.prototype.nextSteps = function (arrayOfFunctions) {
var lst = arrayOfFunctions || [],
nxt = lst.shift(),
myself = this;
if (nxt) {
this.onNextStep = function () {
nxt.call(myself);
myself.nextSteps(lst);
};
}
};
Morph.prototype.step = nop;
// Morph accessing - geometry getting:
Morph.prototype.left = function () {
return this.bounds.left();
};
Morph.prototype.right = function () {
return this.bounds.right();
};
Morph.prototype.top = function () {
return this.bounds.top();
};
Morph.prototype.bottom = function () {
return this.bounds.bottom();
};
Morph.prototype.center = function () {
return this.bounds.center();
};
Morph.prototype.bottomCenter = function () {
return this.bounds.bottomCenter();
};
Morph.prototype.bottomLeft = function () {
return this.bounds.bottomLeft();
};
Morph.prototype.bottomRight = function () {
return this.bounds.bottomRight();
};
Morph.prototype.boundingBox = function () {
return this.bounds;
};
Morph.prototype.corners = function () {
return this.bounds.corners();
};
Morph.prototype.leftCenter = function () {
return this.bounds.leftCenter();
};
Morph.prototype.rightCenter = function () {
return this.bounds.rightCenter();
};
Morph.prototype.topCenter = function () {
return this.bounds.topCenter();
};
Morph.prototype.topLeft = function () {
return this.bounds.topLeft();
};
Morph.prototype.topRight = function () {
return this.bounds.topRight();
};
Morph.prototype.position = function () {
return this.bounds.origin;
};
Morph.prototype.extent = function () {
return this.bounds.extent();
};
Morph.prototype.width = function () {
return this.bounds.width();
};
Morph.prototype.height = function () {
return this.bounds.height();
};
Morph.prototype.fullBounds = function () {
var result;
result = this.bounds;
this.children.forEach(function (child) {
if (child.isVisible) {
result = result.merge(child.fullBounds());
}
});
return result;
};
Morph.prototype.fullBoundsNoShadow = function () {
// answer my full bounds but ignore any shadow
var result;
result = this.bounds;
this.children.forEach(function (child) {
if (!(child instanceof ShadowMorph) && (child.isVisible)) {
result = result.merge(child.fullBounds());
}
});
return result;
};
Morph.prototype.visibleBounds = function () {
// answer which part of me is not clipped by a Frame
var visible = this.bounds,
frames = this.allParents().filter(function (p) {
return p instanceof FrameMorph;
});
frames.forEach(function (f) {
visible = visible.intersect(f.bounds);
});
return visible;
};
// Morph accessing - simple changes:
Morph.prototype.moveBy = function (delta) {
this.fullChanged();
this.silentMoveBy(delta);
this.fullChanged();
};
Morph.prototype.silentMoveBy = function (delta) {
var children = this.children,
i = children.length;
this.bounds = this.bounds.translateBy(delta);
if (this.cachedFullBounds) {
this.cachedFullBounds = this.cachedFullBounds.translateBy(delta);
}
// ugly optimization avoiding forEach()
for (i; i > 0; i -= 1) {
children[i - 1].silentMoveBy(delta);
}
};
Morph.prototype.setPosition = function (aPoint) {
var delta = aPoint.subtract(this.topLeft());
if ((delta.x !== 0) || (delta.y !== 0)) {
this.moveBy(delta);
}
};
Morph.prototype.silentSetPosition = function (aPoint) {
var delta = aPoint.subtract(this.topLeft());
if ((delta.x !== 0) || (delta.y !== 0)) {
this.silentMoveBy(delta);
}
};
Morph.prototype.setLeft = function (x) {
this.setPosition(
new Point(
x,
this.top()
)
);
};
Morph.prototype.setRight = function (x) {
this.setPosition(
new Point(
x - this.width(),
this.top()
)
);
};
Morph.prototype.setTop = function (y) {
this.setPosition(
new Point(
this.left(),
y
)
);
};
Morph.prototype.setBottom = function (y) {
this.setPosition(
new Point(
this.left(),
y - this.height()
)
);
};
Morph.prototype.setCenter = function (aPoint) {
this.setPosition(
aPoint.subtract(
this.extent().floorDivideBy(2)
)
);
};
Morph.prototype.setFullCenter = function (aPoint) {
this.setPosition(
aPoint.subtract(
this.fullBounds().extent().floorDivideBy(2)
)
);
};
Morph.prototype.keepWithin = function (aMorph) {
// make sure I am completely within another Morph's bounds
var leftOff, rightOff, topOff, bottomOff;
leftOff = this.fullBounds().left() - aMorph.left();
if (leftOff < 0) {
this.moveBy(new Point(-leftOff, 0));
}
rightOff = this.fullBounds().right() - aMorph.right();
if (rightOff > 0) {
this.moveBy(new Point(-rightOff, 0));
}
topOff = this.fullBounds().top() - aMorph.top();
if (topOff < 0) {
this.moveBy(new Point(0, -topOff));
}
bottomOff = this.fullBounds().bottom() - aMorph.bottom();
if (bottomOff > 0) {
this.moveBy(new Point(0, -bottomOff));
}
};
Morph.prototype.scrollIntoView = function () {
var leftOff, rightOff, topOff, bottomOff,
sf = this.parentThatIsA(ScrollFrameMorph);
if (!sf) {return; }
rightOff = Math.min(
this.fullBounds().right() - sf.right(),
sf.contents.right() - sf.right()
);
if (rightOff > 0) {
sf.contents.moveBy(new Point(-rightOff, 0));
}
leftOff = this.fullBounds().left() - sf.left();
if (leftOff < 0) {
sf.contents.moveBy(new Point(-leftOff, 0));
}
topOff = this.fullBounds().top() - sf.top();
if (topOff < 0) {
sf.contents.moveBy(new Point(0, -topOff));
}
bottomOff = this.fullBounds().bottom() - sf.bottom();
if (bottomOff > 0) {
sf.contents.moveBy(new Point(0, -bottomOff));
}
sf.adjustScrollBars();
};
// Morph accessing - dimensional changes requiring a complete redraw
Morph.prototype.setExtent = function (aPoint, silently) {
// silently avoids redrawing the receiver
if (silently) {
this.silentSetExtent(aPoint);
return;
}
if (!aPoint.eq(this.extent())) {
this.changed();
this.silentSetExtent(aPoint);
this.changed();
this.drawNew();
}
};
Morph.prototype.silentSetExtent = function (aPoint) {
var ext, newWidth, newHeight;
ext = aPoint.round();
newWidth = Math.max(ext.x, 0);
newHeight = Math.max(ext.y, 0);
this.bounds.corner = new Point(
this.bounds.origin.x + newWidth,
this.bounds.origin.y + newHeight
);
};
Morph.prototype.setWidth = function (width) {
this.setExtent(new Point(width || 0, this.height()));
};
Morph.prototype.silentSetWidth = function (width) {
// do not drawNew() just yet
var w = Math.max(Math.round(width || 0), 0);
this.bounds.corner = new Point(
this.bounds.origin.x + w,
this.bounds.corner.y
);
};
Morph.prototype.setHeight = function (height) {
this.setExtent(new Point(this.width(), height || 0));
};
Morph.prototype.silentSetHeight = function (height) {
// do not drawNew() just yet
var h = Math.max(Math.round(height || 0), 0);
this.bounds.corner = new Point(
this.bounds.corner.x,
this.bounds.origin.y + h
);
};
Morph.prototype.setColor = function (aColor) {
if (aColor) {
if (!this.color.eq(aColor)) {
this.color = aColor;
this.changed();
this.drawNew();
}
}
};
// Morph displaying:
Morph.prototype.drawNew = function () {
// initialize my surface property
this.image = newCanvas(this.extent());
var context = this.image.getContext('2d');
context.fillStyle = this.color.toString();
context.fillRect(0, 0, this.width(), this.height());
if (this.cachedTexture) {
this.drawCachedTexture();
} else if (this.texture) {
this.drawTexture(this.texture);
}
};
Morph.prototype.drawTexture = function (url) {
var myself = this;
this.cachedTexture = new Image();
this.cachedTexture.onload = function () {
myself.drawCachedTexture();
};
this.cachedTexture.src = this.texture = url; // make absolute
};
Morph.prototype.drawCachedTexture = function () {
var bg = this.cachedTexture,
cols = Math.floor(this.image.width / bg.width),
lines = Math.floor(this.image.height / bg.height),
x,
y,
context = this.image.getContext('2d');
for (y = 0; y <= lines; y += 1) {
for (x = 0; x <= cols; x += 1) {
context.drawImage(bg, x * bg.width, y * bg.height);
}
}
this.changed();
};
/*
Morph.prototype.drawCachedTexture = function () {
var context = this.image.getContext('2d'),
pattern = context.createPattern(this.cachedTexture, 'repeat');
context.fillStyle = pattern;
context.fillRect(0, 0, this.image.width, this.image.height);
this.changed();
};
*/
Morph.prototype.drawOn = function (aCanvas, aRect) {
var rectangle, area, delta, src, context, w, h, sl, st,
pic = this.cachedFullImage || this.image,
bounds = this.cachedFullBounds || this.bounds;
if (!this.isVisible) {
return null;
}
rectangle = aRect || bounds;
area = rectangle.intersect(bounds);
if (area.extent().gt(new Point(0, 0))) {
delta = bounds.position().neg();
src = area.copy().translateBy(delta);
context = aCanvas.getContext('2d');
context.globalAlpha = this.alpha;
sl = src.left();
st = src.top();
w = Math.min(src.width(), pic.width - sl);
h = Math.min(src.height(), pic.height - st);
if (w < 1 || h < 1) {
return null;
}
context.drawImage(
pic,
sl,
st,
w,
h,
area.left(),
area.top(),
w,
h
);
}
};
Morph.prototype.fullDrawOn = function (aCanvas, aRect) {
var rectangle;
if (!this.isVisible) {
return null;
}
rectangle = aRect || this.cachedFullBounds || this.fullBounds();
this.drawOn(aCanvas, rectangle);
if (this.cachedFullImage) {return; }
this.children.forEach(function (child) {
child.fullDrawOn(aCanvas, rectangle);
});
};
Morph.prototype.hide = function () {
this.isVisible = false;
this.changed();
this.children.forEach(function (child) {
child.hide();
});
};
Morph.prototype.show = function () {
this.isVisible = true;
this.changed();
this.children.forEach(function (child) {
child.show();
});
};
Morph.prototype.toggleVisibility = function () {
this.isVisible = (!this.isVisible);
this.changed();
this.children.forEach(function (child) {
child.toggleVisibility();
});
};
// Morph full image:
Morph.prototype.fullImageClassic = function () {
var fb = this.cachedFullBounds || this.fullBounds(), // use the cache since fullDrawOn() will
img = newCanvas(fb.extent()),
ctx = img.getContext('2d');
ctx.translate(-fb.origin.x, -fb.origin.y);
this.fullDrawOn(img, fb);
img.globalAlpha = this.alpha;
return img;
};
Morph.prototype.fullImage = function () {
var img, ctx, fb;
img = newCanvas(this.fullBounds().extent());
ctx = img.getContext('2d');
fb = this.fullBounds();
this.allChildren().forEach(function (morph) {
if (morph.isVisible) {
ctx.globalAlpha = morph.alpha;
if (morph.image.width && morph.image.height) {
ctx.drawImage(
morph.image,
morph.bounds.origin.x - fb.origin.x,
morph.bounds.origin.y - fb.origin.y
);
}
}
});
return img;
};
// Morph shadow:
Morph.prototype.shadowImage = function (off, color) {
// fallback for Windows Chrome-Shadow bug
var fb, img, outline, sha, ctx,
offset = off || new Point(7, 7),
clr = color || new Color(0, 0, 0);
fb = this.fullBounds().extent();
img = this.fullImage();
outline = newCanvas(fb);
ctx = outline.getContext('2d');
ctx.drawImage(img, 0, 0);
ctx.globalCompositeOperation = 'destination-out';
ctx.drawImage(
img,
-offset.x,
-offset.y
);
sha = newCanvas(fb);
ctx = sha.getContext('2d');
ctx.drawImage(outline, 0, 0);
ctx.globalCompositeOperation = 'source-atop';
ctx.fillStyle = clr.toString();
ctx.fillRect(0, 0, fb.x, fb.y);
return sha;
};
Morph.prototype.shadowImageBlurred = function (off, color) {
var fb, img, sha, ctx,
offset = off || new Point(7, 7),
blur = this.shadowBlur,
clr = color || new Color(0, 0, 0);
fb = this.fullBounds().extent().add(blur * 2);
img = this.fullImage();
sha = newCanvas(fb);
ctx = sha.getContext('2d');
ctx.shadowOffsetX = offset.x;
ctx.shadowOffsetY = offset.y;
ctx.shadowBlur = blur;
ctx.shadowColor = clr.toString();
ctx.drawImage(
img,
blur - offset.x,
blur - offset.y
);
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
ctx.shadowBlur = 0;
ctx.globalCompositeOperation = 'destination-out';
ctx.drawImage(
img,
blur - offset.x,
blur - offset.y
);
return sha;
};
Morph.prototype.shadow = function (off, a, color) {
var shadow = new ShadowMorph(),
offset = off || new Point(7, 7),
alpha = a || ((a === 0) ? 0 : 0.2),
fb = this.fullBounds();
shadow.setExtent(fb.extent().add(this.shadowBlur * 2));
if (useBlurredShadows && !MorphicPreferences.isFlat) {
shadow.image = this.shadowImageBlurred(offset, color);
shadow.alpha = alpha;
shadow.setPosition(fb.origin.add(offset).subtract(this.shadowBlur));
} else {
shadow.image = this.shadowImage(offset, color);
shadow.alpha = alpha;
shadow.setPosition(fb.origin.add(offset));
}
return shadow;
};
Morph.prototype.addShadow = function (off, a, color) {
var shadow,
offset = off || new Point(7, 7),
alpha = a || ((a === 0) ? 0 : 0.2);
shadow = this.shadow(offset, alpha, color);
this.addBack(shadow);
this.fullChanged();
return shadow;
};
Morph.prototype.getShadow = function () {
var shadows;
shadows = this.children.slice(0).reverse().filter(
function (child) {
return child instanceof ShadowMorph;
}
);
if (shadows.length !== 0) {
return shadows[0];
}
return null;
};
Morph.prototype.removeShadow = function () {
var shadow = this.getShadow();
if (shadow !== null) {
this.fullChanged();
this.removeChild(shadow);
}
};
// Morph pen trails:
Morph.prototype.penTrails = function () {
// answer my pen trails canvas. default is to answer my image
return this.image;
};
// Morph updating:
Morph.prototype.changed = function () {
if (this.trackChanges) {
var w = this.root();
if (w instanceof WorldMorph) {
w.broken.push(this.visibleBounds().spread());
}
}
if (this.parent) {
this.parent.childChanged(this);
}
};
Morph.prototype.fullChanged = function () {
if (this.trackChanges) {
var w = this.root();
if (w instanceof WorldMorph) {
w.broken.push(
(this.cachedFullBounds || this.fullBounds()).spread()
);
}
}
};
Morph.prototype.childChanged = function () {
// react to a change in one of my children,
// default is to just pass this message on upwards
// override this method for Morphs that need to adjust accordingly
if (this.parent) {
this.parent.childChanged(this);
}
};
// Morph accessing - structure:
Morph.prototype.world = function () {
var root = this.root();
if (root instanceof WorldMorph) {
return root;
}
if (root instanceof HandMorph) {
return root.world;
}
return null;
};
Morph.prototype.add = function (aMorph) {
var owner = aMorph.parent;
if (owner !== null) {
owner.removeChild(aMorph);
}
this.addChild(aMorph);
};
Morph.prototype.addBack = function (aMorph) {
var owner = aMorph.parent;
if (owner !== null) {
owner.removeChild(aMorph);
}
this.addChildFirst(aMorph);
};
Morph.prototype.topMorphAt = function (point) {
var i, result;
if (!this.isVisible) {return null; }
for (i = this.children.length - 1; i >= 0; i -= 1) {
result = this.children[i].topMorphAt(point);
if (result) {return result; }
}
return this.bounds.containsPoint(point) &&
(this.noticesTransparentClick || !this.isTransparentAt(point)) ? this
: null;
};
Morph.prototype.topMorphSuchThat = function (predicate) {
var next;
if (predicate.call(null, this)) {
next = detect(
this.children.slice(0).reverse(),
predicate
);
if (next) {
return next.topMorphSuchThat(predicate);
}
return this;
}
return null;
};
Morph.prototype.overlappedMorphs = function () {
//exclude the World
var world = this.world(),
fb = this.fullBounds(),
myself = this,
allParents = this.allParents(),
allChildren = this.allChildren(),
morphs;
morphs = world.allChildren();
return morphs.filter(function (m) {
return m.isVisible &&
m !== myself &&
m !== world &&
!contains(allParents, m) &&
!contains(allChildren, m) &&
m.fullBounds().intersects(fb);
});
};
// Morph pixel access:
Morph.prototype.getPixelColor = function (aPoint) {
var point, context, data;
point = aPoint.subtract(this.bounds.origin);
context = this.image.getContext('2d');
data = context.getImageData(point.x, point.y, 1, 1);
return new Color(
data.data[0],
data.data[1],
data.data[2],
data.data[3]
);
};
Morph.prototype.isTransparentAt = function (aPoint) {
var point, context, data;
if (this.bounds.containsPoint(aPoint)) {
if (this.texture) {
return false;
}
point = aPoint.subtract(this.bounds.origin);
context = this.image.getContext('2d');
data = context.getImageData(
Math.floor(point.x),
Math.floor(point.y),
1,
1
);
return data.data[3] === 0;
}
return false;
};
// Morph duplicating:
Morph.prototype.copy = function () {
var c = copy(this);
c.parent = null;
c.children = [];
c.bounds = this.bounds.copy();
return c;
};
Morph.prototype.fullCopy = function () {
/*
Produce a copy of me with my entire tree of submorphs. Morphs
mentioned more than once are all directed to a single new copy.
Other properties are also *shallow* copied, so you must override
to deep copy Arrays and (complex) Objects
*/
var map = new Map(), c;
c = this.copyRecordingReferences(map);
c.forAllChildren(function (m) {
m.updateReferences(map);
});
return c;
};
Morph.prototype.copyRecordingReferences = function (map) {
/*
Recursively copy this entire composite morph, recording the
correspondence between old and new morphs in the given dictionary.
This dictionary will be used to update intra-composite references
in the copy. See updateReferences().
Note: This default implementation copies ONLY morphs. If a morph
stores morphs in other properties that it wants to copy, then it
should override this method to do so. The same goes for morphs that
contain other complex data that should be copied when the morph is
duplicated.
*/
var c = this.copy();
map.set(this, c);
this.children.forEach(function (m) {
c.add(m.copyRecordingReferences(map));
});
return c;
};
Morph.prototype.updateReferences = function (map) {
/*
Update intra-morph references within a composite morph that has
been copied. For example, if a button refers to morph X in the
orginal composite then the copy of that button in the new composite
should refer to the copy of X in new composite, not the original X.
*/
var properties = Object.keys(this),
l = properties.length,
property,
value,
reference,
i;
for (i = 0; i < l; i += 1) {
property = properties[i];
value = this[property];
if (value && value.isMorph) {
reference = map.get(value);
if (reference) { this[property] = reference; }
}
}
};
// Morph dragging and dropping:
Morph.prototype.rootForGrab = function () {
if (this instanceof ShadowMorph) {
return this.parent.rootForGrab();
}
if (this.parent instanceof ScrollFrameMorph) {
return this.parent;
}
if (this.parent === null ||
this.parent instanceof WorldMorph ||
this.parent instanceof FrameMorph ||
this.isDraggable === true) {
return this;
}
return this.parent.rootForGrab();
};
Morph.prototype.isCorrectingOutsideDrag = function () {
// make sure I don't "trail behind" the hand when dragged
// override for morphs that you want to be dragged outside
// their full bounds
return true;
};
Morph.prototype.wantsDropOf = function (aMorph) {
// default is to answer the general flag - change for my heirs
if ((aMorph instanceof HandleMorph) ||
(aMorph instanceof MenuMorph) ||
(aMorph instanceof InspectorMorph)) {
return false;
}
return this.acceptsDrops;
};
Morph.prototype.pickUp = function (wrrld) {
var world = wrrld || this.world();
this.setPosition(
world.hand.position().subtract(
this.extent().floorDivideBy(2)
)
);
world.hand.grab(this);
};
Morph.prototype.isPickedUp = function () {
return this.parentThatIsA(HandMorph) !== null;
};
Morph.prototype.situation = function () {
// answer a dictionary specifying where I am right now, so
// I can slide back to it if I'm dropped somewhere else
if (this.parent) {
return {
origin: this.parent,
position: this.position().subtract(this.parent.position())
};
}
return null;
};
Morph.prototype.slideBackTo = function (situation, inSteps) {
var steps = inSteps || 5,
pos = situation.origin.position().add(situation.position),
xStep = -(this.left() - pos.x) / steps,
yStep = -(this.top() - pos.y) / steps,
stepCount = 0,
oldStep = this.step,
oldFps = this.fps,
myself = this;
this.fps = 0;
this.step = function () {
myself.moveBy(new Point(xStep, yStep));
stepCount += 1;
if (stepCount === steps) {
situation.origin.add(myself);
if (situation.origin.reactToDropOf) {
situation.origin.reactToDropOf(myself);
}
myself.step = oldStep;
myself.fps = oldFps;
}
};
};
// Morph utilities:
Morph.prototype.nop = function () {
nop();
};
Morph.prototype.resize = function () {
this.world().activeHandle = new HandleMorph(this);
};
Morph.prototype.move = function () {
this.world().activeHandle = new HandleMorph(
this,
null,
null,
null,
null,
'move'
);
};
Morph.prototype.moveCenter = function () {
this.world().activeHandle = new HandleMorph(
this,
null,
null,
null,
null,
'moveCenter'
);
};
Morph.prototype.hint = function (msg) {
var m, text;
text = msg;
if (msg) {
if (msg.toString) {
text = msg.toString();
}
} else {
text = 'NULL';
}
m = new MenuMorph(this, text);
m.isDraggable = true;
m.popUpCenteredAtHand(this.world());
};
Morph.prototype.inform = function (msg) {
var m, text;
text = msg;
if (msg) {
if (msg.toString) {
text = msg.toString();
}
} else {
text = 'NULL';
}
m = new MenuMorph(this, text);
m.addItem("Ok");
m.isDraggable = true;
m.popUpCenteredAtHand(this.world());
};
Morph.prototype.prompt = function (
msg,
callback,
environment,
defaultContents,
width,
floorNum,
ceilingNum,
isRounded
) {
var menu, entryField, slider, isNumeric;
if (ceilingNum) {
isNumeric = true;
}
menu = new MenuMorph(
callback || null,
msg || '',
environment || null
);
entryField = new StringFieldMorph(
defaultContents || '',
width || 100,
MorphicPreferences.prompterFontSize,
MorphicPreferences.prompterFontName,
false,
false,
isNumeric
);
menu.items.push(entryField);
if (ceilingNum || MorphicPreferences.useSliderForInput) {
slider = new SliderMorph(
floorNum || 0,
ceilingNum,
parseFloat(defaultContents),
Math.floor((ceilingNum - floorNum) / 4),
'horizontal'
);
slider.alpha = 1;
slider.color = new Color(225, 225, 225);
slider.button.color = menu.borderColor;
slider.button.highlightColor = slider.button.color.copy();
slider.button.highlightColor.b += 100;
slider.button.pressColor = slider.button.color.copy();
slider.button.pressColor.b += 150;
slider.setHeight(MorphicPreferences.prompterSliderSize);
if (isRounded) {
slider.action = function (num) {
entryField.changed();
entryField.text.text = Math.round(num).toString();
entryField.text.drawNew();
entryField.text.changed();
entryField.text.edit();
};
} else {
slider.action = function (num) {
entryField.changed();
entryField.text.text = num.toString();
entryField.text.drawNew();
entryField.text.changed();
};
}
menu.items.push(slider);
}
menu.addLine(2);
menu.addItem('Ok', function () {
return entryField.string();
});
menu.addItem('Cancel', function () {
return null;
});
menu.isDraggable = true;
menu.popUpAtHand(this.world());
entryField.text.edit();
};
Morph.prototype.pickColor = function (
msg,
callback,
environment,
defaultContents
) {
var menu, colorPicker;
menu = new MenuMorph(
callback || null,
msg || '',
environment || null
);
colorPicker = new ColorPickerMorph(defaultContents);
menu.items.push(colorPicker);
menu.addLine(2);
menu.addItem('Ok', function () {
return colorPicker.getChoice();
});
menu.addItem('Cancel', function () {
return null;
});
menu.isDraggable = true;
menu.popUpAtHand(this.world());
};
Morph.prototype.inspect = function (anotherObject) {
var world = this.world instanceof Function ?
this.world() : this.root() || this.world,
inspector,
inspectee = this;
if (anotherObject) {
inspectee = anotherObject;
}
inspector = new InspectorMorph(inspectee);
inspector.setPosition(world.hand.position());
inspector.keepWithin(world);
world.add(inspector);
inspector.changed();
};
// Morph menus:
Morph.prototype.contextMenu = function () {
var world;
if (this.customContextMenu) {
return this.customContextMenu;
}
world = this.world instanceof Function ? this.world() : this.world;
if (world && world.isDevMode) {
if (this.parent === world) {
return this.developersMenu();
}
return this.hierarchyMenu();
}
return this.userMenu() ||
(this.parent && this.parent.userMenu());
};
Morph.prototype.hierarchyMenu = function () {
var parents = this.allParents(),
world = this.world instanceof Function ? this.world() : this.world,
menu = new MenuMorph(this, null);
parents.forEach(function (each) {
if (each.developersMenu && (each !== world)) {
menu.addItem(each.toString().slice(0, 50), function () {
each.developersMenu().popUpAtHand(world);
});
}
});
return menu;
};
Morph.prototype.developersMenu = function () {
// 'name' is not an official property of a function, hence:
var world = this.world instanceof Function ? this.world() : this.world,
userMenu = this.userMenu() ||
(this.parent && this.parent.userMenu()),
menu = new MenuMorph(this, this.constructor.name ||
this.constructor.toString().split(' ')[1].split('(')[0]);
if (userMenu) {
menu.addItem(
'user features...',
function () {
userMenu.popUpAtHand(world);
}
);
menu.addLine();
}
menu.addItem(
"color...",
function () {
this.pickColor(
menu.title + '\ncolor:',
this.setColor,
this,
this.color
);
},
'choose another color \nfor this morph'
);
menu.addItem(
"transparency...",
function () {
this.prompt(
menu.title + '\nalpha\nvalue:',
this.setAlphaScaled,
this,
(this.alpha * 100).toString(),
null,
1,
100,
true
);
},
'set this morph\'s\nalpha value'
);
menu.addItem(
"resize...",
'resize',
'show a handle\nwhich can be dragged\nto change this morph\'s' +
' extent'
);
menu.addLine();
menu.addItem(
"duplicate",
function () {
this.fullCopy().pickUp(this.world());
},
'make a copy\nand pick it up'
);
menu.addItem(
"pick up",
'pickUp',
'disattach and put \ninto the hand'
);
menu.addItem(
"attach...",
'attach',
'stick this morph\nto another one'
);
menu.addItem(
"move...",
'move',
'show a handle\nwhich can be dragged\nto move this morph'
);
menu.addItem(
"inspect...",
'inspect',
'open a window\non all properties'
);
menu.addItem(
"pic...",
function () {
window.open(this.fullImageClassic().toDataURL());
},
'open a new window\nwith a picture of this morph'
);
menu.addLine();
if (this.isDraggable) {
menu.addItem(
"lock",
'toggleIsDraggable',
'make this morph\nunmovable'
);
} else {
menu.addItem(
"unlock",
'toggleIsDraggable',
'make this morph\nmovable'
);
}
menu.addItem("hide", 'hide');
menu.addItem("delete", 'destroy');
if (!(this instanceof WorldMorph)) {
menu.addLine();
menu.addItem(
"World...",
function () {
world.contextMenu().popUpAtHand(world);
},
'show the\nWorld\'s menu'
);
}
return menu;
};
Morph.prototype.userMenu = function () {
return null;
};
// Morph menu actions
Morph.prototype.setAlphaScaled = function (alpha) {
// for context menu demo purposes
var newAlpha, unscaled;
if (typeof alpha === 'number') {
unscaled = alpha / 100;
this.alpha = Math.min(Math.max(unscaled, 0.1), 1);
} else {
newAlpha = parseFloat(alpha);
if (!isNaN(newAlpha)) {
unscaled = newAlpha / 100;
this.alpha = Math.min(Math.max(unscaled, 0.1), 1);
}
}
this.changed();
};
Morph.prototype.attach = function () {
var choices = this.overlappedMorphs(),
menu = new MenuMorph(this, 'choose new parent:'),
myself = this;
choices.forEach(function (each) {
menu.addItem(each.toString().slice(0, 50), function () {
each.add(myself);
myself.isDraggable = false;
});
});
if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
Morph.prototype.toggleIsDraggable = function () {
// for context menu demo purposes
this.isDraggable = !this.isDraggable;
};
Morph.prototype.colorSetters = function () {
// for context menu demo purposes
return ['color'];
};
Morph.prototype.numericalSetters = function () {
// for context menu demo purposes
return [
'setLeft',
'setTop',
'setWidth',
'setHeight',
'setAlphaScaled'
];
};
// Morph entry field tabbing:
Morph.prototype.allEntryFields = function () {
return this.allChildren().filter(function (each) {
return each.isEditable &&
(each instanceof StringMorph ||
each instanceof TextMorph);
});
};
Morph.prototype.nextEntryField = function (current) {
var fields = this.allEntryFields(),
idx = fields.indexOf(current);
if (idx !== -1) {
if (fields.length > idx + 1) {
return fields[idx + 1];
}
}
return fields[0];
};
Morph.prototype.previousEntryField = function (current) {
var fields = this.allEntryFields(),
idx = fields.indexOf(current);
if (idx !== -1) {
if (idx > 0) {
return fields[idx - 1];
}
return fields[fields.length - 1];
}
return fields[0];
};
Morph.prototype.tab = function (editField) {
/*
the key was pressed in one of my edit fields.
invoke my "nextTab()" function if it exists, else
propagate it up my owner chain.
*/
if (this.nextTab) {
this.nextTab(editField);
} else if (this.parent) {
this.parent.tab(editField);
}
};
Morph.prototype.backTab = function (editField) {
/*
the key was pressed in one of my edit fields.
invoke my "previousTab()" function if it exists, else
propagate it up my owner chain.
*/
if (this.previousTab) {
this.previousTab(editField);
} else if (this.parent) {
this.parent.backTab(editField);
}
};
/*
the following are examples of what the navigation methods should
look like. Insert these at the World level for fallback, and at lower
levels in the Morphic tree (e.g. dialog boxes) for a more fine-grained
control over the tabbing cycle.
Morph.prototype.nextTab = function (editField) {
var next = this.nextEntryField(editField);
editField.clearSelection();
next.selectAll();
next.edit();
};
Morph.prototype.previousTab = function (editField) {
var prev = this.previousEntryField(editField);
editField.clearSelection();
prev.selectAll();
prev.edit();
};
*/
// Morph events:
Morph.prototype.escalateEvent = function (functionName, arg) {
var handler = this.parent;
while (!handler[functionName] && handler.parent !== null) {
handler = handler.parent;
}
if (handler[functionName]) {
handler[functionName](arg);
}
};
// Morph eval:
Morph.prototype.evaluateString = function (code) {
var result;
try {
result = eval(code);
this.drawNew();
this.changed();
} catch (err) {
this.inform(err);
}
return result;
};
// Morph collision detection:
Morph.prototype.isTouching = function (otherMorph) {
var oImg = this.overlappingImage(otherMorph),
data;
if (!oImg.width || !oImg.height) {
return false;
}
data = oImg.getContext('2d')
.getImageData(1, 1, oImg.width, oImg.height)
.data;
return detect(
data,
function (each) {
return each !== 0;
}
) !== null;
};
Morph.prototype.overlappingImage = function (otherMorph) {
var fb = this.fullBounds(),
otherFb = otherMorph.fullBounds(),
oRect = fb.intersect(otherFb),
oImg = newCanvas(oRect.extent()),
ctx = oImg.getContext('2d');
if (oRect.width() < 1 || oRect.height() < 1) {
return newCanvas(new Point(1, 1));
}
ctx.drawImage(
this.fullImage(),
oRect.origin.x - fb.origin.x,
oRect.origin.y - fb.origin.y
);
ctx.globalCompositeOperation = 'source-in';
ctx.drawImage(
otherMorph.fullImage(),
otherFb.origin.x - oRect.origin.x,
otherFb.origin.y - oRect.origin.y
);
return oImg;
};
// ShadowMorph /////////////////////////////////////////////////////////
// ShadowMorph inherits from Morph:
ShadowMorph.prototype = new Morph();
ShadowMorph.prototype.constructor = ShadowMorph;
ShadowMorph.uber = Morph.prototype;
// ShadowMorph instance creation:
function ShadowMorph() {
this.init();
}
ShadowMorph.prototype.topMorphAt = function () {
return null;
};
// HandleMorph ////////////////////////////////////////////////////////
// I am a resize / move handle that can be attached to any Morph
// HandleMorph inherits from Morph:
HandleMorph.prototype = new Morph();
HandleMorph.prototype.constructor = HandleMorph;
HandleMorph.uber = Morph.prototype;
// HandleMorph instance creation:
function HandleMorph(target, minX, minY, insetX, insetY, type) {
// if insetY is missing, it will be the same as insetX
this.init(target, minX, minY, insetX, insetY, type);
}
HandleMorph.prototype.init = function (
target,
minX,
minY,
insetX,
insetY,
type
) {
var size = MorphicPreferences.handleSize;
this.target = target || null;
this.minExtent = new Point(minX || 0, minY || 0);
this.inset = new Point(insetX || 0, insetY || insetX || 0);
this.type = type || 'resize'; // can also be 'move', 'moveCenter'
HandleMorph.uber.init.call(this);
this.color = new Color(255, 255, 255);
this.isDraggable = false;
this.noticesTransparentClick = true;
this.setExtent(new Point(size, size));
};
// HandleMorph drawing:
HandleMorph.prototype.drawNew = function () {
this.normalImage = newCanvas(this.extent());
this.highlightImage = newCanvas(this.extent());
this.drawOnCanvas(
this.normalImage,
this.color,
new Color(100, 100, 100)
);
this.drawOnCanvas(
this.highlightImage,
new Color(100, 100, 255),
new Color(255, 255, 255)
);
this.image = this.normalImage;
if (this.target) {
if (this.type === 'moveCenter') {
this.setCenter(this.target.center());
} else { // 'resize', 'move'
this.setPosition(
this.target.bottomRight().subtract(
this.extent().add(this.inset)
)
);
}
this.target.add(this);
this.target.changed();
}
};
HandleMorph.prototype.drawOnCanvas = function (
aCanvas,
color,
shadowColor
) {
var context = aCanvas.getContext('2d'),
isSquare = (this.type.indexOf('move') === 0),
p1,
p11,
p2,
p22,
i;
context.lineWidth = 1;
context.lineCap = 'round';
context.strokeStyle = color.toString();
if (isSquare) {
p1 = this.bottomLeft().subtract(this.position());
p11 = p1.copy();
p2 = this.topRight().subtract(this.position());
p22 = p2.copy();
for (i = 0; i <= this.height(); i = i + 6) {
p11.y = p1.y - i;
p22.y = p2.y - i;
context.beginPath();
context.moveTo(p11.x, p11.y);
context.lineTo(p22.x, p22.y);
context.closePath();
context.stroke();
}
}
p1 = this.bottomLeft().subtract(this.position());
p11 = p1.copy();
p2 = this.topRight().subtract(this.position());
p22 = p2.copy();
for (i = 0; i <= this.width(); i = i + 6) {
p11.x = p1.x + i;
p22.x = p2.x + i;
context.beginPath();
context.moveTo(p11.x, p11.y);
context.lineTo(p22.x, p22.y);
context.closePath();
context.stroke();
}
context.strokeStyle = shadowColor.toString();
if (isSquare) {
p1 = this.bottomLeft().subtract(this.position());
p11 = p1.copy();
p2 = this.topRight().subtract(this.position());
p22 = p2.copy();
for (i = -2; i <= this.height(); i = i + 6) {
p11.y = p1.y - i;
p22.y = p2.y - i;
context.beginPath();
context.moveTo(p11.x, p11.y);
context.lineTo(p22.x, p22.y);
context.closePath();
context.stroke();
}
}
p1 = this.bottomLeft().subtract(this.position());
p11 = p1.copy();
p2 = this.topRight().subtract(this.position());
p22 = p2.copy();
for (i = 2; i <= this.width(); i = i + 6) {
p11.x = p1.x + i;
p22.x = p2.x + i;
context.beginPath();
context.moveTo(p11.x, p11.y);
context.lineTo(p22.x, p22.y);
context.closePath();
context.stroke();
}
};
// HandleMorph stepping:
HandleMorph.prototype.step = null;
HandleMorph.prototype.mouseDownLeft = function (pos) {
var world = this.root(),
offset,
myself = this;
if (!this.target) {
return null;
}
if (this.type === 'moveCenter') {
offset = pos.subtract(this.center());
} else {
offset = pos.subtract(this.bounds.origin);
}
this.step = function () {
var newPos, newExt;
if (world.hand.mouseButton) {
newPos = world.hand.bounds.origin.copy().subtract(offset);
if (this.type === 'resize') {
newExt = newPos.add(
myself.extent().add(myself.inset)
).subtract(myself.target.bounds.origin);
newExt = newExt.max(myself.minExtent);
myself.target.setExtent(newExt);
myself.setPosition(
myself.target.bottomRight().subtract(
myself.extent().add(myself.inset)
)
);
} else if (this.type === 'moveCenter') {
myself.target.setCenter(newPos);
} else { // type === 'move'
myself.target.setPosition(
newPos.subtract(this.target.extent())
.add(this.extent())
);
}
} else {
this.step = null;
}
};
if (!this.target.step) {
this.target.step = function () {
nop();
};
}
};
// HandleMorph dragging and dropping:
HandleMorph.prototype.rootForGrab = function () {
return this;
};
// HandleMorph events:
HandleMorph.prototype.mouseEnter = function () {
this.image = this.highlightImage;
this.changed();
};
HandleMorph.prototype.mouseLeave = function () {
this.image = this.normalImage;
this.changed();
};
// HandleMorph menu:
HandleMorph.prototype.attach = function () {
var choices = this.overlappedMorphs(),
menu = new MenuMorph(this, 'choose target:'),
myself = this;
choices.forEach(function (each) {
menu.addItem(each.toString().slice(0, 50), function () {
myself.isDraggable = false;
myself.target = each;
myself.drawNew();
myself.noticesTransparentClick = true;
});
});
if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
// PenMorph ////////////////////////////////////////////////////////////
// I am a simple LOGO-wise turtle.
// PenMorph: referenced constructors
var PenMorph;
// PenMorph inherits from Morph:
PenMorph.prototype = new Morph();
PenMorph.prototype.constructor = PenMorph;
PenMorph.uber = Morph.prototype;
// PenMorph instance creation:
function PenMorph() {
this.init();
}
PenMorph.prototype.init = function () {
var size = MorphicPreferences.handleSize * 4;
// additional properties:
this.isWarped = false; // internal optimization
this.heading = 0;
this.isDown = true;
this.size = 1;
this.wantsRedraw = false;
this.penPoint = 'tip'; // or 'center"
this.penBounds = null; // rect around the visible arrow shape
HandleMorph.uber.init.call(this);
this.setExtent(new Point(size, size));
};
// PenMorph updating - optimized for warping, i.e atomic recursion
PenMorph.prototype.changed = function () {
if (this.isWarped === false) {
var w = this.root();
if (w instanceof WorldMorph) {
w.broken.push(this.visibleBounds().spread());
}
if (this.parent) {
this.parent.childChanged(this);
}
}
};
// PenMorph display:
PenMorph.prototype.drawNew = function (facing) {
// my orientation can be overridden with the "facing" parameter to
// implement Scratch-style rotation styles
var context, start, dest, left, right, len,
direction = facing || this.heading;
if (this.isWarped) {
this.wantsRedraw = true;
return;
}
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
len = this.width() / 2;
start = this.center().subtract(this.bounds.origin);
if (this.penPoint === 'tip') {
dest = start.distanceAngle(len * 0.75, direction - 180);
left = start.distanceAngle(len, direction + 195);
right = start.distanceAngle(len, direction - 195);
} else { // 'middle'
dest = start.distanceAngle(len * 0.75, direction);
left = start.distanceAngle(len * 0.33, direction + 230);
right = start.distanceAngle(len * 0.33, direction - 230);
}
// cache penBounds
this.penBounds = new Rectangle(
Math.min(start.x, dest.x, left.x, right.x),
Math.min(start.y, dest.y, left.y, right.y),
Math.max(start.x, dest.x, left.x, right.x),
Math.max(start.y, dest.y, left.y, right.y)
);
// draw arrow shape
context.fillStyle = this.color.toString();
context.beginPath();
context.moveTo(start.x, start.y);
context.lineTo(left.x, left.y);
context.lineTo(dest.x, dest.y);
context.lineTo(right.x, right.y);
context.closePath();
context.strokeStyle = 'white';
context.lineWidth = 3;
context.stroke();
context.strokeStyle = 'black';
context.lineWidth = 1;
context.stroke();
context.fill();
};
// PenMorph access:
PenMorph.prototype.setHeading = function (degrees) {
this.heading = parseFloat(degrees) % 360;
this.drawNew();
this.changed();
};
// PenMorph drawing:
PenMorph.prototype.drawLine = function (start, dest) {
var context = this.parent.penTrails().getContext('2d'),
from = start.subtract(this.parent.bounds.origin),
to = dest.subtract(this.parent.bounds.origin);
if (this.isDown) {
context.lineWidth = this.size;
context.strokeStyle = this.color.toString();
context.lineCap = 'round';
context.lineJoin = 'round';
context.beginPath();
context.moveTo(from.x, from.y);
context.lineTo(to.x, to.y);
context.stroke();
if (this.isWarped === false) {
this.world().broken.push(
start.rectangle(dest).expandBy(
Math.max(this.size / 2, 1)
).intersect(this.parent.visibleBounds()).spread()
);
}
}
};
// PenMorph turtle ops:
PenMorph.prototype.turn = function (degrees) {
this.setHeading(this.heading + parseFloat(degrees));
};
PenMorph.prototype.forward = function (steps) {
var start = this.center(),
dest,
dist = parseFloat(steps);
if (dist >= 0) {
dest = this.position().distanceAngle(dist, this.heading);
} else {
dest = this.position().distanceAngle(
Math.abs(dist),
(this.heading - 180)
);
}
this.setPosition(dest);
this.drawLine(start, this.center());
};
PenMorph.prototype.down = function () {
this.isDown = true;
};
PenMorph.prototype.up = function () {
this.isDown = false;
};
PenMorph.prototype.clear = function () {
this.parent.drawNew();
this.parent.changed();
};
// PenMorph optimization for atomic recursion:
PenMorph.prototype.startWarp = function () {
this.wantsRedraw = false;
this.isWarped = true;
};
PenMorph.prototype.endWarp = function () {
this.isWarped = false;
if (this.wantsRedraw) {
this.drawNew();
this.wantsRedraw = false;
}
this.parent.changed();
};
PenMorph.prototype.warp = function (fun) {
this.startWarp();
fun.call(this);
this.endWarp();
};
PenMorph.prototype.warpOp = function (selector, argsArray) {
this.startWarp();
this[selector].apply(this, argsArray);
this.endWarp();
};
// PenMorph demo ops:
// try these with WARP eg.: this.warp(function () {tree(12, 120, 20)})
PenMorph.prototype.warpSierpinski = function (length, min) {
this.warpOp('sierpinski', [length, min]);
};
PenMorph.prototype.sierpinski = function (length, min) {
var i;
if (length > min) {
for (i = 0; i < 3; i += 1) {
this.sierpinski(length * 0.5, min);
this.turn(120);
this.forward(length);
}
}
};
PenMorph.prototype.warpTree = function (level, length, angle) {
this.warpOp('tree', [level, length, angle]);
};
PenMorph.prototype.tree = function (level, length, angle) {
if (level > 0) {
this.size = level;
this.forward(length);
this.turn(angle);
this.tree(level - 1, length * 0.75, angle);
this.turn(angle * -2);
this.tree(level - 1, length * 0.75, angle);
this.turn(angle);
this.forward(-length);
}
};
// ColorPaletteMorph ///////////////////////////////////////////////////
var ColorPaletteMorph;
// ColorPaletteMorph inherits from Morph:
ColorPaletteMorph.prototype = new Morph();
ColorPaletteMorph.prototype.constructor = ColorPaletteMorph;
ColorPaletteMorph.uber = Morph.prototype;
// ColorPaletteMorph instance creation:
function ColorPaletteMorph(target, sizePoint) {
this.init(
target || null,
sizePoint || new Point(80, 50)
);
}
ColorPaletteMorph.prototype.init = function (target, size) {
ColorPaletteMorph.uber.init.call(this);
this.target = target;
this.targetSetter = 'color';
this.silentSetExtent(size);
this.choice = null;
this.drawNew();
};
ColorPaletteMorph.prototype.drawNew = function () {
var context, ext, x, y, h, l;
ext = this.extent();
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
this.choice = new Color();
for (x = 0; x <= ext.x; x += 1) {
h = 360 * x / ext.x;
for (y = 0; y <= ext.y; y += 1) {
l = 100 - (y / ext.y * 100);
context.fillStyle = 'hsl(' + h + ',100%,' + l + '%)';
context.fillRect(x, y, 1, 1);
}
}
};
ColorPaletteMorph.prototype.mouseMove = function (pos) {
this.choice = this.getPixelColor(pos);
this.updateTarget();
};
ColorPaletteMorph.prototype.mouseDownLeft = function (pos) {
this.choice = this.getPixelColor(pos);
this.updateTarget();
};
ColorPaletteMorph.prototype.updateTarget = function () {
if (this.target instanceof Morph && this.choice !== null) {
if (this.target[this.targetSetter] instanceof Function) {
this.target[this.targetSetter](this.choice);
} else {
this.target[this.targetSetter] = this.choice;
this.target.drawNew();
this.target.changed();
}
}
};
// ColorPaletteMorph menu:
ColorPaletteMorph.prototype.developersMenu = function () {
var menu = ColorPaletteMorph.uber.developersMenu.call(this);
menu.addLine();
menu.addItem(
'set target',
"setTarget",
'choose another morph\nwhose color property\n will be' +
' controlled by this one'
);
return menu;
};
ColorPaletteMorph.prototype.setTarget = function () {
var choices = this.overlappedMorphs(),
menu = new MenuMorph(this, 'choose target:'),
myself = this;
choices.push(this.world());
choices.forEach(function (each) {
menu.addItem(each.toString().slice(0, 50), function () {
myself.target = each;
myself.setTargetSetter();
});
});
if (choices.length === 1) {
this.target = choices[0];
this.setTargetSetter();
} else if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
ColorPaletteMorph.prototype.setTargetSetter = function () {
var choices = this.target.colorSetters(),
menu = new MenuMorph(this, 'choose target property:'),
myself = this;
choices.forEach(function (each) {
menu.addItem(each, function () {
myself.targetSetter = each;
});
});
if (choices.length === 1) {
this.targetSetter = choices[0];
} else if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
// GrayPaletteMorph ///////////////////////////////////////////////////
var GrayPaletteMorph;
// GrayPaletteMorph inherits from ColorPaletteMorph:
GrayPaletteMorph.prototype = new ColorPaletteMorph();
GrayPaletteMorph.prototype.constructor = GrayPaletteMorph;
GrayPaletteMorph.uber = ColorPaletteMorph.prototype;
// GrayPaletteMorph instance creation:
function GrayPaletteMorph(target, sizePoint) {
this.init(
target || null,
sizePoint || new Point(80, 10)
);
}
GrayPaletteMorph.prototype.drawNew = function () {
var context, ext, gradient;
ext = this.extent();
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
this.choice = new Color();
gradient = context.createLinearGradient(0, 0, ext.x, ext.y);
gradient.addColorStop(0, 'black');
gradient.addColorStop(1, 'white');
context.fillStyle = gradient;
context.fillRect(0, 0, ext.x, ext.y);
};
// ColorPickerMorph ///////////////////////////////////////////////////
// ColorPickerMorph inherits from Morph:
ColorPickerMorph.prototype = new Morph();
ColorPickerMorph.prototype.constructor = ColorPickerMorph;
ColorPickerMorph.uber = Morph.prototype;
// ColorPickerMorph instance creation:
function ColorPickerMorph(defaultColor) {
this.init(defaultColor || new Color(255, 255, 255));
}
ColorPickerMorph.prototype.init = function (defaultColor) {
this.choice = defaultColor;
ColorPickerMorph.uber.init.call(this);
this.color = new Color(255, 255, 255);
this.silentSetExtent(new Point(80, 80));
this.drawNew();
};
ColorPickerMorph.prototype.drawNew = function () {
ColorPickerMorph.uber.drawNew.call(this);
this.buildSubmorphs();
};
ColorPickerMorph.prototype.buildSubmorphs = function () {
var cpal, gpal, x, y;
this.children.forEach(function (child) {
child.destroy();
});
this.children = [];
this.feedback = new Morph();
this.feedback.color = this.choice;
this.feedback.setExtent(new Point(20, 20));
cpal = new ColorPaletteMorph(
this.feedback,
new Point(this.width(), 50)
);
gpal = new GrayPaletteMorph(
this.feedback,
new Point(this.width(), 5)
);
cpal.setPosition(this.bounds.origin);
this.add(cpal);
gpal.setPosition(cpal.bottomLeft());
this.add(gpal);
x = (gpal.left() +
Math.floor((gpal.width() - this.feedback.width()) / 2));
y = gpal.bottom() + Math.floor((this.bottom() -
gpal.bottom() - this.feedback.height()) / 2);
this.feedback.setPosition(new Point(x, y));
this.add(this.feedback);
};
ColorPickerMorph.prototype.getChoice = function () {
return this.feedback.color;
};
ColorPickerMorph.prototype.rootForGrab = function () {
return this;
};
// BlinkerMorph ////////////////////////////////////////////////////////
// can be used for text cursors
var BlinkerMorph;
// BlinkerMorph inherits from Morph:
BlinkerMorph.prototype = new Morph();
BlinkerMorph.prototype.constructor = BlinkerMorph;
BlinkerMorph.uber = Morph.prototype;
// BlinkerMorph instance creation:
function BlinkerMorph(rate) {
this.init(rate);
}
BlinkerMorph.prototype.init = function (rate) {
BlinkerMorph.uber.init.call(this);
this.color = new Color(0, 0, 0);
this.fps = rate || 2;
this.drawNew();
};
// BlinkerMorph stepping:
BlinkerMorph.prototype.step = function () {
this.toggleVisibility();
};
// CursorMorph /////////////////////////////////////////////////////////
// I am a String/Text editing widget
// CursorMorph: referenced constructors
var CursorMorph;
// CursorMorph inherits from BlinkerMorph:
CursorMorph.prototype = new BlinkerMorph();
CursorMorph.prototype.constructor = CursorMorph;
CursorMorph.uber = BlinkerMorph.prototype;
// CursorMorph preferences settings:
CursorMorph.prototype.viewPadding = 1;
// CursorMorph instance creation:
function CursorMorph(aStringOrTextMorph) {
this.init(aStringOrTextMorph);
}
CursorMorph.prototype.init = function (aStringOrTextMorph) {
var ls;
// additional properties:
this.keyDownEventUsed = false;
this.target = aStringOrTextMorph;
this.originalContents = this.target.text;
this.originalAlignment = this.target.alignment;
this.slot = this.target.text.length;
CursorMorph.uber.init.call(this);
ls = fontHeight(this.target.fontSize);
this.setExtent(new Point(Math.max(Math.floor(ls / 20), 1), ls));
this.drawNew();
this.image.getContext('2d').font = this.target.font();
if (this.target instanceof TextMorph &&
(this.target.alignment !== 'left')) {
this.target.setAlignmentToLeft();
}
this.gotoSlot(this.slot);
this.initializeClipboardHandler();
};
CursorMorph.prototype.initializeClipboardHandler = function () {
// Add hidden text box for copying and pasting
var myself = this,
wrrld = this.target.world();
this.clipboardHandler = document.createElement('textarea');
this.clipboardHandler.style.position = 'absolute';
this.clipboardHandler.style.right = '101%'; // placed just out of view
document.body.appendChild(this.clipboardHandler);
this.clipboardHandler.value = this.target.selection();
this.clipboardHandler.focus();
this.clipboardHandler.select();
this.clipboardHandler.addEventListener(
'keypress',
function (event) {
myself.processKeyPress(event);
this.value = myself.target.selection();
this.select();
},
false
);
this.clipboardHandler.addEventListener(
'keydown',
function (event) {
myself.processKeyDown(event);
if (event.shiftKey) {
wrrld.currentKey = 16;
}
this.value = myself.target.selection();
this.select();
// Make sure tab prevents default
if (event.key === 'U+0009' ||
event.key === 'Tab') {
myself.processKeyPress(event);
event.preventDefault();
}
},
false
);
this.clipboardHandler.addEventListener(
'keyup',
function (event) {
wrrld.currentKey = null;
},
false
);
this.clipboardHandler.addEventListener(
'input',
function (event) {
if (this.value === '') {
myself.gotoSlot(myself.target.selectionStartSlot());
myself.target.deleteSelection();
}
},
false
);
};
// CursorMorph event processing:
CursorMorph.prototype.processKeyPress = function (event) {
// this.inspectKeyEvent(event);
if (this.keyDownEventUsed) {
this.keyDownEventUsed = false;
return null;
}
if ((event.keyCode === 40) || event.charCode === 40) {
this.insert('(');
return null;
}
if ((event.keyCode === 37) || event.charCode === 37) {
this.insert('%');
return null;
}
if (event.keyCode) { // Opera doesn't support charCode
if (event.ctrlKey && (!event.altKey)) {
this.ctrl(event.keyCode, event.shiftKey);
} else if (event.metaKey) {
this.cmd(event.keyCode, event.shiftKey);
} else {
this.insert(
String.fromCharCode(event.keyCode),
event.shiftKey
);
}
} else if (event.charCode) { // all other browsers
if (event.ctrlKey && (!event.altKey)) {
this.ctrl(event.charCode, event.shiftKey);
} else if (event.metaKey) {
this.cmd(event.charCode, event.shiftKey);
} else {
this.insert(
String.fromCharCode(event.charCode),
event.shiftKey
);
}
}
// notify target's parent of key event
this.target.escalateEvent('reactToKeystroke', event);
};
CursorMorph.prototype.processKeyDown = function (event) {
// this.inspectKeyEvent(event);
var shift = event.shiftKey,
wordNavigation = event.ctrlKey || event.altKey,
selecting = this.target.selection().length > 0;
this.keyDownEventUsed = false;
if (event.ctrlKey && (!event.altKey)) {
this.ctrl(event.keyCode, event.shiftKey);
// notify target's parent of key event
this.target.escalateEvent('reactToKeystroke', event);
}
if (event.metaKey) {
this.cmd(event.keyCode, event.shiftKey);
// notify target's parent of key event
this.target.escalateEvent('reactToKeystroke', event);
}
switch (event.keyCode) {
case 37:
if (selecting && !shift && !wordNavigation) {
this.gotoSlot(Math.min(this.target.startMark, this.target.endMark));
this.target.clearSelection();
} else {
this.goLeft(
shift,
wordNavigation ?
this.slot - this.target.previousWordFrom(this.slot)
: 1);
}
this.keyDownEventUsed = true;
break;
case 39:
if (selecting && !shift && !wordNavigation) {
this.gotoSlot(Math.max(this.target.startMark, this.target.endMark));
this.target.clearSelection();
} else {
this.goRight(
shift,
wordNavigation ?
this.target.nextWordFrom(this.slot) - this.slot
: 1);
}
this.keyDownEventUsed = true;
break;
case 38:
this.goUp(shift);
this.keyDownEventUsed = true;
break;
case 40:
this.goDown(shift);
this.keyDownEventUsed = true;
break;
case 36:
this.goHome(shift);
this.keyDownEventUsed = true;
break;
case 35:
this.goEnd(shift);
this.keyDownEventUsed = true;
break;
case 46:
this.deleteRight();
this.keyDownEventUsed = true;
break;
case 8:
this.deleteLeft();
this.keyDownEventUsed = true;
break;
case 13:
if ((this.target instanceof StringMorph) || shift) {
this.accept();
} else {
this.insert('\n');
}
this.keyDownEventUsed = true;
break;
case 27:
this.cancel();
this.keyDownEventUsed = true;
break;
default:
nop();
// this.inspectKeyEvent(event);
}
// notify target's parent of key event
this.target.escalateEvent('reactToKeystroke', event);
};
// CursorMorph navigation:
/*
// original non-scrolling code, commented out in case we need to fall back:
CursorMorph.prototype.gotoSlot = function (newSlot) {
this.setPosition(this.target.slotPosition(newSlot));
this.slot = Math.max(newSlot, 0);
};
*/
CursorMorph.prototype.gotoSlot = function (slot) {
var length = this.target.text.length,
pos = this.target.slotPosition(slot),
right,
left;
this.slot = slot < 0 ? 0 : slot > length ? length : slot;
if (this.parent && this.target.isScrollable) {
right = this.parent.right() - this.viewPadding;
left = this.parent.left() + this.viewPadding;
if (pos.x > right) {
this.target.setLeft(this.target.left() + right - pos.x);
pos.x = right;
}
if (pos.x < left) {
left = Math.min(this.parent.left(), left);
this.target.setLeft(this.target.left() + left - pos.x);
pos.x = left;
}
if (this.target.right() < right &&
right - this.target.width() < left) {
pos.x += right - this.target.right();
this.target.setRight(right);
}
}
this.show();
this.setPosition(pos);
if (this.parent
&& this.parent.parent instanceof ScrollFrameMorph
&& this.target.isScrollable) {
this.parent.parent.scrollCursorIntoView(this);
}
};
CursorMorph.prototype.goLeft = function (shift, howMany) {
this.updateSelection(shift);
this.gotoSlot(this.slot - (howMany || 1));
this.updateSelection(shift);
};
CursorMorph.prototype.goRight = function (shift, howMany) {
this.updateSelection(shift);
this.gotoSlot(this.slot + (howMany || 1));
this.updateSelection(shift);
};
CursorMorph.prototype.goUp = function (shift) {
this.updateSelection(shift);
this.gotoSlot(this.target.upFrom(this.slot));
this.updateSelection(shift);
};
CursorMorph.prototype.goDown = function (shift) {
this.updateSelection(shift);
this.gotoSlot(this.target.downFrom(this.slot));
this.updateSelection(shift);
};
CursorMorph.prototype.goHome = function (shift) {
this.updateSelection(shift);
this.gotoSlot(this.target.startOfLine(this.slot));
this.updateSelection(shift);
};
CursorMorph.prototype.goEnd = function (shift) {
this.updateSelection(shift);
this.gotoSlot(this.target.endOfLine(this.slot));
this.updateSelection(shift);
};
CursorMorph.prototype.gotoPos = function (aPoint) {
this.gotoSlot(this.target.slotAt(aPoint));
this.show();
};
// CursorMorph selecting:
CursorMorph.prototype.updateSelection = function (shift) {
if (shift) {
if (isNil(this.target.endMark) && isNil(this.target.startMark)) {
this.target.startMark = this.slot;
this.target.endMark = this.slot;
} else if (this.target.endMark !== this.slot) {
this.target.endMark = this.slot;
this.target.drawNew();
this.target.changed();
}
} else {
this.target.clearSelection();
}
};
// CursorMorph editing:
CursorMorph.prototype.accept = function () {
var world = this.root();
if (world) {
world.stopEditing();
}
this.escalateEvent('accept', this);
};
CursorMorph.prototype.cancel = function () {
var world = this.root();
this.undo();
if (world) {
world.stopEditing();
}
this.escalateEvent('cancel', this);
};
CursorMorph.prototype.undo = function () {
this.target.text = this.originalContents;
this.target.changed();
this.target.drawNew();
this.target.changed();
this.gotoSlot(0);
};
CursorMorph.prototype.insert = function (aChar, shiftKey) {
var text;
if (aChar === '\u0009') {
this.target.escalateEvent('reactToEdit', this.target);
if (shiftKey) {
return this.target.backTab(this.target);
}
return this.target.tab(this.target);
}
if (!this.target.isNumeric ||
!isNaN(parseFloat(aChar)) ||
contains(['-', '.'], aChar)) {
if (this.target.selection() !== '') {
this.gotoSlot(this.target.selectionStartSlot());
this.target.deleteSelection();
}
text = this.target.text;
text = text.slice(0, this.slot) +
aChar +
text.slice(this.slot);
this.target.text = text;
this.target.drawNew();
this.target.changed();
this.goRight(false, aChar.length);
}
};
CursorMorph.prototype.ctrl = function (aChar, shiftKey) {
if (aChar === 64 || (aChar === 65 && shiftKey)) {
this.insert('@');
} else if (aChar === 65) {
this.target.selectAll();
} else if (aChar === 90) {
this.undo();
} else if (aChar === 123) {
this.insert('{');
} else if (aChar === 125) {
this.insert('}');
} else if (aChar === 91) {
this.insert('[');
} else if (aChar === 93) {
this.insert(']');
} else if (!isNil(this.target.receiver)) {
if (aChar === 68) {
this.target.doIt();
} else if (aChar === 73) {
this.target.inspectIt();
} else if (aChar === 80) {
this.target.showIt();
}
}
};
CursorMorph.prototype.cmd = function (aChar, shiftKey) {
if (aChar === 64 || (aChar === 65 && shiftKey)) {
this.insert('@');
} else if (aChar === 65) {
this.target.selectAll();
} else if (aChar === 90) {
this.undo();
} else if (!isNil(this.target.receiver)) {
if (aChar === 68) {
this.target.doIt();
} else if (aChar === 73) {
this.target.inspectIt();
} else if (aChar === 80) {
this.target.showIt();
}
}
};
CursorMorph.prototype.deleteRight = function () {
var text;
if (this.target.selection() !== '') {
this.gotoSlot(this.target.selectionStartSlot());
this.target.deleteSelection();
} else {
text = this.target.text;
this.target.changed();
text = text.slice(0, this.slot) + text.slice(this.slot + 1);
this.target.text = text;
this.target.drawNew();
}
};
CursorMorph.prototype.deleteLeft = function () {
var text;
if (this.target.selection()) {
this.gotoSlot(this.target.selectionStartSlot());
return this.target.deleteSelection();
}
text = this.target.text;
this.target.changed();
this.target.text = text.substring(0, this.slot - 1) +
text.substr(this.slot);
this.target.drawNew();
this.goLeft();
};
// CursorMorph destroying:
CursorMorph.prototype.destroy = function () {
if (this.target.alignment !== this.originalAlignment) {
this.target.alignment = this.originalAlignment;
this.target.drawNew();
this.target.changed();
}
this.destroyClipboardHandler();
CursorMorph.uber.destroy.call(this);
};
CursorMorph.prototype.destroyClipboardHandler = function () {
var nodes = document.body.children,
each,
i;
if (this.clipboardHandler) {
for (i = 0; i < nodes.length; i += 1) {
each = nodes[i];
if (each === this.clipboardHandler) {
document.body.removeChild(this.clipboardHandler);
this.clipboardHandler = null;
}
}
}
};
// CursorMorph utilities:
CursorMorph.prototype.inspectKeyEvent = function (event) {
// private
this.inform(
'Key pressed: ' +
String.fromCharCode(event.charCode) +
'\n------------------------' +
'\ncharCode: ' +
event.charCode.toString() +
'\nkeyCode: ' +
event.keyCode.toString() +
'\nshiftKey: ' +
event.shiftKey.toString() +
'\naltKey: ' +
event.altKey.toString() +
'\nctrlKey: ' +
event.ctrlKey.toString() +
'\ncmdKey: ' +
event.metaKey.toString()
);
};
// BoxMorph ////////////////////////////////////////////////////////////
// I can have an optionally rounded border
var BoxMorph;
// BoxMorph inherits from Morph:
BoxMorph.prototype = new Morph();
BoxMorph.prototype.constructor = BoxMorph;
BoxMorph.uber = Morph.prototype;
// BoxMorph instance creation:
function BoxMorph(edge, border, borderColor) {
this.init(edge, border, borderColor);
}
BoxMorph.prototype.init = function (edge, border, borderColor) {
this.edge = edge || 4;
this.border = border || ((border === 0) ? 0 : 2);
this.borderColor = borderColor || new Color();
BoxMorph.uber.init.call(this);
};
// BoxMorph drawing:
BoxMorph.prototype.drawNew = function () {
var context;
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
if ((this.edge === 0) && (this.border === 0)) {
BoxMorph.uber.drawNew.call(this);
return null;
}
context.fillStyle = this.color.toString();
context.beginPath();
this.outlinePath(
context,
Math.max(this.edge - this.border, 0),
this.border
);
context.closePath();
context.fill();
if (this.border > 0) {
context.lineWidth = this.border;
context.strokeStyle = this.borderColor.toString();
context.beginPath();
this.outlinePath(context, this.edge, this.border / 2);
context.closePath();
context.stroke();
}
};
BoxMorph.prototype.outlinePath = function (context, radius, inset) {
var offset = radius + inset,
w = this.width(),
h = this.height();
// top left:
context.arc(
offset,
offset,
radius,
radians(-180),
radians(-90),
false
);
// top right:
context.arc(
w - offset,
offset,
radius,
radians(-90),
radians(-0),
false
);
// bottom right:
context.arc(
w - offset,
h - offset,
radius,
radians(0),
radians(90),
false
);
// bottom left:
context.arc(
offset,
h - offset,
radius,
radians(90),
radians(180),
false
);
};
// BoxMorph menus:
BoxMorph.prototype.developersMenu = function () {
var menu = BoxMorph.uber.developersMenu.call(this);
menu.addLine();
menu.addItem(
"border width...",
function () {
this.prompt(
menu.title + '\nborder\nwidth:',
this.setBorderWidth,
this,
this.border.toString(),
null,
0,
100,
true
);
},
'set the border\'s\nline size'
);
menu.addItem(
"border color...",
function () {
this.pickColor(
menu.title + '\nborder color:',
this.setBorderColor,
this,
this.borderColor
);
},
'set the border\'s\nline color'
);
menu.addItem(
"corner size...",
function () {
this.prompt(
menu.title + '\ncorner\nsize:',
this.setCornerSize,
this,
this.edge.toString(),
null,
0,
100,
true
);
},
'set the corner\'s\nradius'
);
return menu;
};
BoxMorph.prototype.setBorderWidth = function (size) {
// for context menu demo purposes
var newSize;
if (typeof size === 'number') {
this.border = Math.max(size, 0);
} else {
newSize = parseFloat(size);
if (!isNaN(newSize)) {
this.border = Math.max(newSize, 0);
}
}
this.drawNew();
this.changed();
};
BoxMorph.prototype.setBorderColor = function (color) {
// for context menu demo purposes
if (color) {
this.borderColor = color;
this.drawNew();
this.changed();
}
};
BoxMorph.prototype.setCornerSize = function (size) {
// for context menu demo purposes
var newSize;
if (typeof size === 'number') {
this.edge = Math.max(size, 0);
} else {
newSize = parseFloat(size);
if (!isNaN(newSize)) {
this.edge = Math.max(newSize, 0);
}
}
this.drawNew();
this.changed();
};
BoxMorph.prototype.colorSetters = function () {
// for context menu demo purposes
return ['color', 'borderColor'];
};
BoxMorph.prototype.numericalSetters = function () {
// for context menu demo purposes
var list = BoxMorph.uber.numericalSetters.call(this);
list.push('setBorderWidth', 'setCornerSize');
return list;
};
// SpeechBubbleMorph ///////////////////////////////////////////////////
/*
I am a comic-style speech bubble that can display either a string,
a Morph, a Canvas or a toString() representation of anything else.
If I am invoked using popUp() I behave like a tool tip.
*/
// SpeechBubbleMorph: referenced constructors
var SpeechBubbleMorph;
// SpeechBubbleMorph inherits from BoxMorph:
SpeechBubbleMorph.prototype = new BoxMorph();
SpeechBubbleMorph.prototype.constructor = SpeechBubbleMorph;
SpeechBubbleMorph.uber = BoxMorph.prototype;
// SpeechBubbleMorph instance creation:
function SpeechBubbleMorph(
contents,
color,
edge,
border,
borderColor,
padding,
isThought
) {
this.init(contents, color, edge, border, borderColor, padding, isThought);
}
SpeechBubbleMorph.prototype.init = function (
contents,
color,
edge,
border,
borderColor,
padding,
isThought
) {
this.isPointingRight = true; // orientation of text
this.contents = contents || '';
this.padding = padding || 0; // additional vertical pixels
this.isThought = isThought || false; // draw "think" bubble
this.isClickable = false;
SpeechBubbleMorph.uber.init.call(
this,
edge || 6,
border || ((border === 0) ? 0 : 1),
borderColor || new Color(140, 140, 140)
);
this.color = color || new Color(230, 230, 230);
this.drawNew();
};
// SpeechBubbleMorph invoking:
SpeechBubbleMorph.prototype.popUp = function (world, pos, isClickable) {
this.drawNew();
this.setPosition(pos.subtract(new Point(0, this.height())));
this.addShadow(new Point(2, 2), 80);
this.keepWithin(world);
world.add(this);
this.fullChanged();
world.hand.destroyTemporaries();
world.hand.temporaries.push(this);
if (!isClickable) {
this.mouseEnter = function () {
this.destroy();
};
} else {
this.isClickable = true;
}
};
// SpeechBubbleMorph drawing:
SpeechBubbleMorph.prototype.drawNew = function () {
// re-build my contents
if (this.contentsMorph) {
this.contentsMorph.destroy();
}
if (this.contents instanceof Morph) {
this.contentsMorph = this.contents;
} else if (isString(this.contents)) {
this.contentsMorph = new TextMorph(
this.contents,
MorphicPreferences.bubbleHelpFontSize,
null,
false,
true,
'center'
);
} else if (this.contents instanceof HTMLCanvasElement) {
this.contentsMorph = new Morph();
this.contentsMorph.silentSetWidth(this.contents.width);
this.contentsMorph.silentSetHeight(this.contents.height);
this.contentsMorph.image = this.contents;
} else {
this.contentsMorph = new TextMorph(
this.contents.toString(),
MorphicPreferences.bubbleHelpFontSize,
null,
false,
true,
'center'
);
}
this.add(this.contentsMorph);
// adjust my layout
this.silentSetWidth(this.contentsMorph.width() +
(this.padding ? this.padding * 2 : this.edge * 2));
this.silentSetHeight(this.contentsMorph.height() +
this.edge +
this.border * 2 +
this.padding * 2 +
2);
// draw my outline
SpeechBubbleMorph.uber.drawNew.call(this);
// position my contents
this.contentsMorph.setPosition(this.position().add(
new Point(
this.padding || this.edge,
this.border + this.padding + 1
)
));
};
SpeechBubbleMorph.prototype.outlinePath = function (
context,
radius,
inset
) {
var offset = radius + inset,
w = this.width(),
h = this.height(),
rad;
function circle(x, y, r) {
context.moveTo(x + r, y);
context.arc(x, y, r, radians(0), radians(360));
}
// top left:
context.arc(
offset,
offset,
radius,
radians(-180),
radians(-90),
false
);
// top right:
context.arc(
w - offset,
offset,
radius,
radians(-90),
radians(-0),
false
);
// bottom right:
context.arc(
w - offset,
h - offset - radius,
radius,
radians(0),
radians(90),
false
);
if (!this.isThought) { // draw speech bubble hook
if (this.isPointingRight) {
context.lineTo(
offset + radius,
h - offset
);
context.lineTo(
radius / 2 + inset,
h - inset
);
} else { // pointing left
context.lineTo(
w - (radius / 2 + inset),
h - inset
);
context.lineTo(
w - (offset + radius),
h - offset
);
}
}
// bottom left:
context.arc(
offset,
h - offset - radius,
radius,
radians(90),
radians(180),
false
);
if (this.isThought) {
// close large bubble:
context.lineTo(
inset,
offset
);
// draw thought bubbles:
if (this.isPointingRight) {
// tip bubble:
rad = radius / 4;
circle(rad + inset, h - rad - inset, rad);
// middle bubble:
rad = radius / 3.2;
circle(rad * 2 + inset, h - rad - inset * 2, rad);
// top bubble:
rad = radius / 2.8;
circle(rad * 3 + inset * 2, h - rad - inset * 4, rad);
} else { // pointing left
// tip bubble:
rad = radius / 4;
circle(w - (rad + inset), h - rad - inset, rad);
// middle bubble:
rad = radius / 3.2;
circle(w - (rad * 2 + inset), h - rad - inset * 2, rad);
// top bubble:
rad = radius / 2.8;
circle(w - (rad * 3 + inset * 2), h - rad - inset * 4, rad);
}
}
};
// SpeechBubbleMorph shadow
/*
only take the 'plain' image, so the box rounding and the
shadow doesn't become conflicted by embedded scrolling panes
*/
SpeechBubbleMorph.prototype.shadowImage = function (off, color) {
// fallback for Windows Chrome-Shadow bug
var fb, img, outline, sha, ctx,
offset = off || new Point(7, 7),
clr = color || new Color(0, 0, 0);
fb = this.extent();
img = this.image;
outline = newCanvas(fb);
ctx = outline.getContext('2d');
ctx.drawImage(img, 0, 0);
ctx.globalCompositeOperation = 'destination-out';
ctx.drawImage(
img,
-offset.x,
-offset.y
);
sha = newCanvas(fb);
ctx = sha.getContext('2d');
ctx.drawImage(outline, 0, 0);
ctx.globalCompositeOperation = 'source-atop';
ctx.fillStyle = clr.toString();
ctx.fillRect(0, 0, fb.x, fb.y);
return sha;
};
SpeechBubbleMorph.prototype.shadowImageBlurred = function (off, color) {
var fb, img, sha, ctx,
offset = off || new Point(7, 7),
blur = this.shadowBlur,
clr = color || new Color(0, 0, 0);
fb = this.extent().add(blur * 2);
img = this.image;
sha = newCanvas(fb);
ctx = sha.getContext('2d');
ctx.shadowOffsetX = offset.x;
ctx.shadowOffsetY = offset.y;
ctx.shadowBlur = blur;
ctx.shadowColor = clr.toString();
ctx.drawImage(
img,
blur - offset.x,
blur - offset.y
);
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
ctx.shadowBlur = 0;
ctx.globalCompositeOperation = 'destination-out';
ctx.drawImage(
img,
blur - offset.x,
blur - offset.y
);
return sha;
};
// SpeechBubbleMorph resizing
SpeechBubbleMorph.prototype.fixLayout = function () {
this.removeShadow();
this.drawNew();
this.addShadow(new Point(2, 2), 80);
};
// CircleBoxMorph //////////////////////////////////////////////////////
// I can be used for sliders
var CircleBoxMorph;
// CircleBoxMorph inherits from Morph:
CircleBoxMorph.prototype = new Morph();
CircleBoxMorph.prototype.constructor = CircleBoxMorph;
CircleBoxMorph.uber = Morph.prototype;
function CircleBoxMorph(orientation) {
this.init(orientation || 'vertical');
}
CircleBoxMorph.prototype.init = function (orientation) {
CircleBoxMorph.uber.init.call(this);
this.orientation = orientation;
this.autoOrient = true;
this.setExtent(new Point(20, 100));
};
CircleBoxMorph.prototype.autoOrientation = function () {
if (this.height() > this.width()) {
this.orientation = 'vertical';
} else {
this.orientation = 'horizontal';
}
};
CircleBoxMorph.prototype.drawNew = function () {
var radius, center1, center2, rect, points, x, y,
context, ext,
myself = this;
if (this.autoOrient) {
this.autoOrientation();
}
this.image = newCanvas(this.extent());
context = this.image.getContext('2d');
if (this.orientation === 'vertical') {
radius = this.width() / 2;
x = this.center().x;
center1 = new Point(x, this.top() + radius);
center2 = new Point(x, this.bottom() - radius);
rect = this.bounds.origin.add(new Point(0, radius)).corner(
this.bounds.corner.subtract(new Point(0, radius))
);
} else {
radius = this.height() / 2;
y = this.center().y;
center1 = new Point(this.left() + radius, y);
center2 = new Point(this.right() - radius, y);
rect = this.bounds.origin.add(new Point(radius, 0)).corner(
this.bounds.corner.subtract(new Point(radius, 0))
);
}
points = [ center1.subtract(this.bounds.origin),
center2.subtract(this.bounds.origin)];
points.forEach(function (center) {
context.fillStyle = myself.color.toString();
context.beginPath();
context.arc(
center.x,
center.y,
radius,
0,
2 * Math.PI,
false
);
context.closePath();
context.fill();
});
rect = rect.translateBy(this.bounds.origin.neg());
ext = rect.extent();
if (ext.x > 0 && ext.y > 0) {
context.fillRect(
rect.origin.x,
rect.origin.y,
rect.width(),
rect.height()
);
}
};
// CircleBoxMorph menu:
CircleBoxMorph.prototype.developersMenu = function () {
var menu = CircleBoxMorph.uber.developersMenu.call(this);
menu.addLine();
if (this.orientation === 'vertical') {
menu.addItem(
"horizontal...",
'toggleOrientation',
'toggle the\norientation'
);
} else {
menu.addItem(
"vertical...",
'toggleOrientation',
'toggle the\norientation'
);
}
return menu;
};
CircleBoxMorph.prototype.toggleOrientation = function () {
var center = this.center();
this.changed();
if (this.orientation === 'vertical') {
this.orientation = 'horizontal';
} else {
this.orientation = 'vertical';
}
this.silentSetExtent(new Point(this.height(), this.width()));
this.setCenter(center);
this.drawNew();
this.changed();
};
// SliderButtonMorph ///////////////////////////////////////////////////
var SliderButtonMorph;
// SliderButtonMorph inherits from CircleBoxMorph:
SliderButtonMorph.prototype = new CircleBoxMorph();
SliderButtonMorph.prototype.constructor = SliderButtonMorph;
SliderButtonMorph.uber = CircleBoxMorph.prototype;
function SliderButtonMorph(orientation) {
this.init(orientation);
}
SliderButtonMorph.prototype.init = function (orientation) {
this.color = new Color(80, 80, 80);
this.highlightColor = new Color(90, 90, 140);
this.pressColor = new Color(80, 80, 160);
this.is3D = false;
this.hasMiddleDip = true;
SliderButtonMorph.uber.init.call(this, orientation);
};
SliderButtonMorph.prototype.autoOrientation = function () {
nop();
};
SliderButtonMorph.prototype.drawNew = function () {
var colorBak = this.color.copy();
SliderButtonMorph.uber.drawNew.call(this);
if (this.is3D || !MorphicPreferences.isFlat) {
this.drawEdges();
}
this.normalImage = this.image;
this.color = this.highlightColor.copy();
SliderButtonMorph.uber.drawNew.call(this);
if (this.is3D || !MorphicPreferences.isFlat) {
this.drawEdges();
}
this.highlightImage = this.image;
this.color = this.pressColor.copy();
SliderButtonMorph.uber.drawNew.call(this);
if (this.is3D || !MorphicPreferences.isFlat) {
this.drawEdges();
}
this.pressImage = this.image;
this.color = colorBak;
this.image = this.normalImage;
};
SliderButtonMorph.prototype.drawEdges = function () {
var context = this.image.getContext('2d'),
gradient,
radius,
w = this.width(),
h = this.height();
context.lineJoin = 'round';
context.lineCap = 'round';
if (this.orientation === 'vertical') {
context.lineWidth = w / 3;
gradient = context.createLinearGradient(
0,
0,
context.lineWidth,
0
);
gradient.addColorStop(0, 'white');
gradient.addColorStop(1, this.color.toString());
context.strokeStyle = gradient;
context.beginPath();
context.moveTo(context.lineWidth * 0.5, w / 2);
context.lineTo(context.lineWidth * 0.5, h - w / 2);
context.stroke();
gradient = context.createLinearGradient(
w - context.lineWidth,
0,
w,
0
);
gradient.addColorStop(0, this.color.toString());
gradient.addColorStop(1, 'black');
context.strokeStyle = gradient;
context.beginPath();
context.moveTo(w - context.lineWidth * 0.5, w / 2);
context.lineTo(w - context.lineWidth * 0.5, h - w / 2);
context.stroke();
if (this.hasMiddleDip) {
gradient = context.createLinearGradient(
context.lineWidth,
0,
w - context.lineWidth,
0
);
radius = w / 4;
gradient.addColorStop(0, 'black');
gradient.addColorStop(0.35, this.color.toString());
gradient.addColorStop(0.65, this.color.toString());
gradient.addColorStop(1, 'white');
context.fillStyle = gradient;
context.beginPath();
context.arc(
w / 2,
h / 2,
radius,
radians(0),
radians(360),
false
);
context.closePath();
context.fill();
}
} else if (this.orientation === 'horizontal') {
context.lineWidth = h / 3;
gradient = context.createLinearGradient(
0,
0,
0,
context.lineWidth
);
gradient.addColorStop(0, 'white');
gradient.addColorStop(1, this.color.toString());
context.strokeStyle = gradient;
context.beginPath();
context.moveTo(h / 2, context.lineWidth * 0.5);
context.lineTo(w - h / 2, context.lineWidth * 0.5);
context.stroke();
gradient = context.createLinearGradient(
0,
h - context.lineWidth,
0,
h
);
gradient.addColorStop(0, this.color.toString());
gradient.addColorStop(1, 'black');
context.strokeStyle = gradient;
context.beginPath();
context.moveTo(h / 2, h - context.lineWidth * 0.5);
context.lineTo(w - h / 2, h - context.lineWidth * 0.5);
context.stroke();
if (this.hasMiddleDip) {
gradient = context.createLinearGradient(
0,
context.lineWidth,
0,
h - context.lineWidth
);
radius = h / 4;
gradient.addColorStop(0, 'black');
gradient.addColorStop(0.35, this.color.toString());
gradient.addColorStop(0.65, this.color.toString());
gradient.addColorStop(1, 'white');
context.fillStyle = gradient;
context.beginPath();
context.arc(
this.width() / 2,
this.height() / 2,
radius,
radians(0),
radians(360),
false
);
context.closePath();
context.fill();
}
}
};
//SliderButtonMorph events:
SliderButtonMorph.prototype.mouseEnter = function () {
this.image = this.highlightImage;
this.changed();
};
SliderButtonMorph.prototype.mouseLeave = function () {
this.image = this.normalImage;
this.changed();
};
SliderButtonMorph.prototype.mouseDownLeft = function (pos) {
this.image = this.pressImage;
this.changed();
this.escalateEvent('mouseDownLeft', pos);
};
SliderButtonMorph.prototype.mouseClickLeft = function () {
this.image = this.highlightImage;
this.changed();
};
SliderButtonMorph.prototype.mouseMove = function () {
// prevent my parent from getting picked up
nop();
};
// SliderMorph ///////////////////////////////////////////////////
// SliderMorph inherits from CircleBoxMorph:
SliderMorph.prototype = new CircleBoxMorph();
SliderMorph.prototype.constructor = SliderMorph;
SliderMorph.uber = CircleBoxMorph.prototype;
function SliderMorph(start, stop, value, size, orientation, color) {
this.init(
start || 1,
stop || 100,
value || 50,
size || 10,
orientation || 'vertical',
color
);
}
SliderMorph.prototype.init = function (
start,
stop,
value,
size,
orientation,
color
) {
this.target = null;
this.action = null;
this.start = start;
this.stop = stop;
this.value = value;
this.size = size;
this.offset = null;
this.button = new SliderButtonMorph();
this.button.isDraggable = false;
this.button.color = new Color(200, 200, 200);
this.button.highlightColor = new Color(210, 210, 255);
this.button.pressColor = new Color(180, 180, 255);
SliderMorph.uber.init.call(this, orientation);
this.add(this.button);
this.alpha = 0.3;
this.color = color || new Color(0, 0, 0);
this.setExtent(new Point(20, 100));
// this.drawNew();
};
SliderMorph.prototype.autoOrientation = function () {
nop();
};
SliderMorph.prototype.rangeSize = function () {
return this.stop - this.start;
};
SliderMorph.prototype.ratio = function () {
return this.size / (this.rangeSize() + 1);
};
SliderMorph.prototype.unitSize = function () {
if (this.orientation === 'vertical') {
return (this.height() - this.button.height()) /
this.rangeSize();
}
return (this.width() - this.button.width()) /
this.rangeSize();
};
SliderMorph.prototype.drawNew = function () {
var bw, bh, posX, posY;
SliderMorph.uber.drawNew.call(this);
this.button.orientation = this.orientation;
if (this.orientation === 'vertical') {
bw = this.width() - 2;
bh = Math.max(bw, Math.round(this.height() * this.ratio()));
this.button.silentSetExtent(new Point(bw, bh));
posX = 1;
posY = Math.min(
Math.round((this.value - this.start) * this.unitSize()),
this.height() - this.button.height()
);
} else {
bh = this.height() - 2;
bw = Math.max(bh, Math.round(this.width() * this.ratio()));
this.button.silentSetExtent(new Point(bw, bh));
posY = 1;
posX = Math.min(
Math.round((this.value - this.start) * this.unitSize()),
this.width() - this.button.width()
);
}
this.button.setPosition(
new Point(posX, posY).add(this.bounds.origin)
);
this.button.drawNew();
this.button.changed();
};
SliderMorph.prototype.updateValue = function () {
var relPos;
if (this.orientation === 'vertical') {
relPos = this.button.top() - this.top();
} else {
relPos = this.button.left() - this.left();
}
this.value = Math.round(relPos / this.unitSize() + this.start);
this.updateTarget();
};
SliderMorph.prototype.updateTarget = function () {
if (this.action) {
if (typeof this.action === 'function') {
this.action.call(this.target, this.value);
} else { // assume it's a String
this.target[this.action](this.value);
}
}
};
// SliderMorph menu:
SliderMorph.prototype.developersMenu = function () {
var menu = SliderMorph.uber.developersMenu.call(this);
menu.addItem(
"show value...",
'showValue',
'display a dialog box\nshowing the selected number'
);
menu.addItem(
"floor...",
function () {
this.prompt(
menu.title + '\nfloor:',
this.setStart,
this,
this.start.toString(),
null,
0,
this.stop - this.size,
true
);
},
'set the minimum value\nwhich can be selected'
);
menu.addItem(
"ceiling...",
function () {
this.prompt(
menu.title + '\nceiling:',
this.setStop,
this,
this.stop.toString(),
null,
this.start + this.size,
this.size * 100,
true
);
},
'set the maximum value\nwhich can be selected'
);
menu.addItem(
"button size...",
function () {
this.prompt(
menu.title + '\nbutton size:',
this.setSize,
this,
this.size.toString(),
null,
1,
this.stop - this.start,
true
);
},
'set the range\ncovered by\nthe slider button'
);
menu.addLine();
menu.addItem(
'set target',
"setTarget",
'select another morph\nwhose numerical property\nwill be ' +
'controlled by this one'
);
return menu;
};
SliderMorph.prototype.showValue = function () {
this.inform(this.value);
};
SliderMorph.prototype.userSetStart = function (num) {
// for context menu demo purposes
this.start = Math.max(num, this.stop);
};
SliderMorph.prototype.setStart = function (num, noUpdate) {
// for context menu demo purposes
var newStart;
if (typeof num === 'number') {
this.start = Math.min(
num,
this.stop - this.size
);
} else {
newStart = parseFloat(num);
if (!isNaN(newStart)) {
this.start = Math.min(
newStart,
this.stop - this.size
);
}
}
this.value = Math.max(this.value, this.start);
if (!noUpdate) {this.updateTarget(); }
this.drawNew();
this.changed();
};
SliderMorph.prototype.setStop = function (num, noUpdate) {
// for context menu demo purposes
var newStop;
if (typeof num === 'number') {
this.stop = Math.max(num, this.start + this.size);
} else {
newStop = parseFloat(num);
if (!isNaN(newStop)) {
this.stop = Math.max(newStop, this.start + this.size);
}
}
this.value = Math.min(this.value, this.stop);
if (!noUpdate) {this.updateTarget(); }
this.drawNew();
this.changed();
};
SliderMorph.prototype.setSize = function (num, noUpdate) {
// for context menu demo purposes
var newSize;
if (typeof num === 'number') {
this.size = Math.min(
Math.max(num, 1),
this.stop - this.start
);
} else {
newSize = parseFloat(num);
if (!isNaN(newSize)) {
this.size = Math.min(
Math.max(newSize, 1),
this.stop - this.start
);
}
}
this.value = Math.min(this.value, this.stop - this.size);
if (!noUpdate) {this.updateTarget(); }
this.drawNew();
this.changed();
};
SliderMorph.prototype.setTarget = function () {
var choices = this.overlappedMorphs(),
menu = new MenuMorph(this, 'choose target:'),
myself = this;
choices.push(this.world());
choices.forEach(function (each) {
menu.addItem(each.toString().slice(0, 50), function () {
myself.target = each;
myself.setTargetSetter();
});
});
if (choices.length === 1) {
this.target = choices[0];
this.setTargetSetter();
} else if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
SliderMorph.prototype.setTargetSetter = function () {
var choices = this.target.numericalSetters(),
menu = new MenuMorph(this, 'choose target property:'),
myself = this;
choices.forEach(function (each) {
menu.addItem(each, function () {
myself.action = each;
});
});
if (choices.length === 1) {
this.action = choices[0];
} else if (choices.length > 0) {
menu.popUpAtHand(this.world());
}
};
SliderMorph.prototype.numericalSetters = function () {
// for context menu demo purposes
var list = SliderMorph.uber.numericalSetters.call(this);
list.push('setStart', 'setStop', 'setSize');
return list;
};
// SliderMorph stepping:
SliderMorph.prototype.step = null;
SliderMorph.prototype.mouseDownLeft = function (pos) {
var world, myself = this;
if (!this.button.bounds.containsPoint(pos)) {
this.offset = new Point(); // return null;
} else {
this.offset = pos.subtract(this.button.bounds.origin);
}
world = this.root();
this.step = function () {
var mousePos, newX, newY;
if (world.hand.mouseButton) {
mousePos = world.hand.bounds.origin;
if (myself.orientation === 'vertical') {
newX = myself.button.bounds.origin.x;
newY = Math.max(
Math.min(
mousePos.y - myself.offset.y,
myself.bottom() - myself.button.height()
),
myself.top()
);
} else {
newY = myself.button.bounds.origin.y;
newX = Math.max(
Math.min(
mousePos.x - myself.offset.x,
myself.right() - myself.button.width()
),
myself.left()
);
}
myself.button.setPosition(new Point(newX, newY));
myself.updateValue();
} else {
this.step = null;
}
};
};
// MouseSensorMorph ////////////////////////////////////////////////////
// for demo and debuggin purposes only, to be removed later
var MouseSensorMorph;
// MouseSensorMorph inherits from BoxMorph:
MouseSensorMorph.prototype = new BoxMorph();
MouseSensorMorph.prototype.constructor = MouseSensorMorph;
MouseSensorMorph.uber = BoxMorph.prototype;
// MouseSensorMorph instance creation:
function MouseSensorMorph(edge, border, borderColor) {
this.init(edge, border, borderColor);
}
MouseSensorMorph.prototype.init = function (edge, border, borderColor) {
MouseSensorMorph.uber.init.call(this);
this.edge = edge || 4;
this.border = border || 2;
this.color = new Color(255, 255, 255);
this.borderColor = borderColor || new Color();
this.isTouched = false;
this.upStep = 0.05;
this.downStep = 0.02;
this.noticesTransparentClick = false;
this.drawNew();
};
MouseSensorMorph.prototype.touch = function () {
var myself = this;
if (!this.isTouched) {
this.isTouched = true;
this.alpha = 0.6;
this.step = function () {
if (myself.isTouched) {
if (myself.alpha < 1) {
myself.alpha = myself.alpha + myself.upStep;
}
} else if (myself.alpha > (myself.downStep)) {
myself.alpha = myself.alpha - myself.downStep;
} else {
myself.alpha = 0;
myself.step = null;
}
myself.changed();
};
}
};
MouseSensorMorph.prototype.unTouch = function () {
this.isTouched = false;
};
MouseSensorMorph.prototype.mouseEnter = function () {
this.touch();
};
MouseSensorMorph.prototype.mouseLeave = function () {
this.unTouch();
};
MouseSensorMorph.prototype.mouseDownLeft = function () {
this.touch();
};
MouseSensorMorph.prototype.mouseClickLeft = function () {
this.unTouch();
};
// InspectorMorph //////////////////////////////////////////////////////
// InspectorMorph: referenced constructors
var ListMorph;
var TriggerMorph;
// InspectorMorph inherits from BoxMorph:
InspectorMorph.prototype = new BoxMorph();
InspectorMorph.prototype.constructor = InspectorMorph;
InspectorMorph.uber = BoxMorph.prototype;
// InspectorMorph instance creation:
function InspectorMorph(target) {
this.init(target);
}
InspectorMorph.prototype.init = function (target) {
// additional properties:
this.target = target;
this.currentProperty = null;
this.showing = 'attributes';
this.markOwnProperties = false;
this.hasUserEditedDetails = false;
// initialize inherited properties:
InspectorMorph.uber.init.call(this);
// override inherited properties:
this.silentSetExtent(
new Point(
MorphicPreferences.handleSize * 20,
MorphicPreferences.handleSize * 20 * 2 / 3
)
);
this.isDraggable = true;
this.border = 1;
this.edge = MorphicPreferences.isFlat ? 1 : 5;
this.color = new Color(60, 60, 60);
this.borderColor = new Color(95, 95, 95);
this.fps = 25;
this.drawNew();
// panes:
this.label = null;
this.list = null;
this.detail = null;
this.work = null;
this.buttonInspect = null;
this.buttonClose = null;
this.buttonSubset = null;
this.buttonEdit = null;
this.resizer = null;
if (this.target) {
this.buildPanes();
}
};
InspectorMorph.prototype.setTarget = function (target) {
this.target = target;
this.currentProperty = null;
this.buildPanes();
};
InspectorMorph.prototype.updateCurrentSelection = function () {
var val, txt, cnts,
sel = this.list.selected,
currentTxt = this.detail.contents.children[0],
root = this.root();
if (root &&
(root.keyboardReceiver instanceof CursorMorph) &&
(root.keyboardReceiver.target === currentTxt)) {
this.hasUserEditedDetails = true;
return;
}
if (isNil(sel) || this.hasUserEditedDetails) {return; }
val = this.target[sel];
this.currentProperty = val;
if (isNil(val)) {
txt = 'NULL';
} else if (isString(val)) {
txt = val;
} else {
txt = val.toString();
}
if (currentTxt.text === txt) {return; }
cnts = new TextMorph(txt);
cnts.isEditable = true;
cnts.enableSelecting();
cnts.setReceiver(this.target);
this.detail.setContents(cnts);
};
InspectorMorph.prototype.buildPanes = function () {
var attribs = [], property, myself = this, ctrl, ev, doubleClickAction;
// remove existing panes
this.children.forEach(function (m) {
if (m !== this.work) { // keep work pane around
m.destroy();
}
});
this.children = [];
// label
this.label = new TextMorph(this.target.toString());
this.label.fontSize = MorphicPreferences.menuFontSize;
this.label.isBold = true;
this.label.color = new Color(255, 255, 255);
this.label.drawNew();
this.add(this.label);
// properties list
for (property in this.target) {
if (property) { // dummy condition, to be refined
attribs.push(property);
}
}
if (this.showing === 'attributes') {
attribs = attribs.filter(function (prop) {
return typeof myself.target[prop] !== 'function';
});
} else if (this.showing === 'methods') {
attribs = attribs.filter(function (prop) {
return typeof myself.target[prop] === 'function';
});
} // otherwise show all properties
doubleClickAction = function () {
var world, inspector;
if (!isObject(myself.currentProperty)) {return; }
world = myself.world();
inspector = new InspectorMorph(
myself.currentProperty
);
inspector.setPosition(world.hand.position());
inspector.keepWithin(world);
world.add(inspector);
inspector.changed();
};
this.list = new ListMorph(
this.target instanceof Array ? attribs : attribs.sort(),
null, // label getter
this.markOwnProperties ?
[ // format list
[ // format element: [color, predicate(element]
new Color(0, 0, 180),
function (element) {
return Object.prototype.hasOwnProperty.call(
myself.target,
element
);
}
]
]
: null,
doubleClickAction
);
this.list.action = function () {
myself.hasUserEditedDetails = false;
myself.updateCurrentSelection();
};
this.list.hBar.alpha = 0.6;
this.list.vBar.alpha = 0.6;
this.list.contents.step = null;
this.add(this.list);
// details pane
this.detail = new ScrollFrameMorph();
this.detail.acceptsDrops = false;
this.detail.contents.acceptsDrops = false;
this.detail.isTextLineWrapping = true;
this.detail.color = new Color(255, 255, 255);
this.detail.hBar.alpha = 0.6;
this.detail.vBar.alpha = 0.6;
ctrl = new TextMorph('');
ctrl.isEditable = true;
ctrl.enableSelecting();
ctrl.setReceiver(this.target);
this.detail.setContents(ctrl);
this.add(this.detail);
// work ('evaluation') pane
// don't refresh the work pane if it already exists
if (this.work === null) {
this.work = new ScrollFrameMorph();
this.work.acceptsDrops = false;
this.work.contents.acceptsDrops = false;
this.work.isTextLineWrapping = true;
this.work.color = new Color(255, 255, 255);
this.work.hBar.alpha = 0.6;
this.work.vBar.alpha = 0.6;
ev = new TextMorph('');
ev.isEditable = true;
ev.enableSelecting();
ev.setReceiver(this.target);
this.work.setContents(ev);
}
this.add(this.work);
// properties button
this.buttonSubset = new TriggerMorph();
this.buttonSubset.labelString = 'show...';
this.buttonSubset.action = function () {
var menu;
menu = new MenuMorph();
menu.addItem(
'attributes',
function () {
myself.showing = 'attributes';
myself.buildPanes();
}
);
menu.addItem(
'methods',
function () {
myself.showing = 'methods';
myself.buildPanes();
}
);
menu.addItem(
'all',
function () {
myself.showing = 'all';
myself.buildPanes();
}
);
menu.addLine();
menu.addItem(
(myself.markOwnProperties ?
'un-mark own' : 'mark own'),
function () {
myself.markOwnProperties = !myself.markOwnProperties;
myself.buildPanes();
},
'highlight\n\'own\' properties'
);
menu.popUpAtHand(myself.world());
};
this.add(this.buttonSubset);
// inspect button
this.buttonInspect = new TriggerMorph();
this.buttonInspect.labelString = 'inspect...';
this.buttonInspect.action = function () {
var menu, world, inspector;
if (isObject(myself.currentProperty)) {
menu = new MenuMorph();
menu.addItem(
'in new inspector...',
function () {
world = myself.world();
inspector = new InspectorMorph(
myself.currentProperty
);
inspector.setPosition(world.hand.position());
inspector.keepWithin(world);
world.add(inspector);
inspector.changed();
}
);
menu.addItem(
'here...',
function () {
myself.setTarget(myself.currentProperty);
}
);
menu.popUpAtHand(myself.world());
} else {
myself.inform(
(myself.currentProperty === null ?
'null' : typeof myself.currentProperty) +
'\nis not inspectable'
);
}
};
this.add(this.buttonInspect);
// edit button
this.buttonEdit = new TriggerMorph();
this.buttonEdit.labelString = 'edit...';
this.buttonEdit.action = function () {
var menu;
menu = new MenuMorph(myself);
menu.addItem("save", 'save', 'accept changes');
menu.addLine();
menu.addItem("add property...", 'addProperty');
menu.addItem("rename...", 'renameProperty');
menu.addItem("remove...", 'removeProperty');
menu.popUpAtHand(myself.world());
};
this.add(this.buttonEdit);
// close button
this.buttonClose = new TriggerMorph();
this.buttonClose.labelString = 'close';
this.buttonClose.action = function () {
myself.destroy();
};
this.add(this.buttonClose);
// resizer
this.resizer = new HandleMorph(
this,
150,
100,
this.edge,
this.edge
);
// update layout
this.fixLayout();
};
InspectorMorph.prototype.fixLayout = function () {
var x, y, r, b, w, h;
Morph.prototype.trackChanges = false;
// label
x = this.left() + this.edge;
y = this.top() + this.edge;
r = this.right() - this.edge;
w = r - x;
this.label.setPosition(new Point(x, y));
this.label.setWidth(w);
if (this.label.height() > (this.height() - 50)) {
this.silentSetHeight(this.label.height() + 50);
this.drawNew();
this.changed();
this.resizer.drawNew();
}
// list
y = this.label.bottom() + 2;
w = Math.min(
Math.floor(this.width() / 3),
this.list.listContents.width()
);
w -= this.edge;
b = this.bottom() - (2 * this.edge) -
MorphicPreferences.handleSize;
h = b - y;
this.list.setPosition(new Point(x, y));
this.list.setExtent(new Point(w, h));
// detail
x = this.list.right() + this.edge;
r = this.right() - this.edge;
w = r - x;
this.detail.setPosition(new Point(x, y));
this.detail.setExtent(new Point(w, (h * 2 / 3) - this.edge));
// work
y = this.detail.bottom() + this.edge;
this.work.setPosition(new Point(x, y));
this.work.setExtent(new Point(w, h / 3));
// properties button
x = this.list.left();
y = this.list.bottom() + this.edge;
w = this.list.width();
h = MorphicPreferences.handleSize;
this.buttonSubset.setPosition(new Point(x, y));
this.buttonSubset.setExtent(new Point(w, h));
// inspect button
x = this.detail.left();
w = this.detail.width() - this.edge -
MorphicPreferences.handleSize;
w = w / 3 - this.edge / 3;
this.buttonInspect.setPosition(new Point(x, y));
this.buttonInspect.setExtent(new Point(w, h));
// edit button
x = this.buttonInspect.right() + this.edge;
this.buttonEdit.setPosition(new Point(x, y));
this.buttonEdit.setExtent(new Point(w, h));
// close button
x = this.buttonEdit.right() + this.edge;
r = this.detail.right() - this.edge -
MorphicPreferences.handleSize;
w = r - x;
this.buttonClose.setPosition(new Point(x, y));
this.buttonClose.setExtent(new Point(w, h));
Morph.prototype.trackChanges = true;
this.changed();
};
InspectorMorph.prototype.setExtent = function (aPoint) {
InspectorMorph.uber.setExtent.call(this, aPoint);
this.fixLayout();
};
// InspectorMorph editing ops:
InspectorMorph.prototype.save = function () {
var txt = this.detail.contents.children[0].text.toString(),
prop = this.list.selected;
try {
// this.target[prop] = evaluate(txt);
this.target.evaluateString('this.' + prop + ' = ' + txt);
this.hasUserEditedDetails = false;
if (this.target.drawNew) {
this.target.changed();
this.target.drawNew();
this.target.changed();
}
} catch (err) {
this.inform(err);
}
};
InspectorMorph.prototype.addProperty = function () {
var myself = this;
this.prompt(
'new property name:',
function (prop) {
if (prop) {
myself.target[prop] = null;
myself.buildPanes();
if (myself.target.drawNew) {
myself.target.changed();
myself.target.drawNew();
myself.target.changed();
}
}
},
this,
'property' // Chrome cannot handle empty strings (others do)
);
};
InspectorMorph.prototype.renameProperty = function () {
var myself = this,
propertyName = this.list.selected;
this.prompt(
'property name:',
function (prop) {
try {
delete (myself.target[propertyName]);
myself.target[prop] = myself.currentProperty;
} catch (err) {
myself.inform(err);
}
myself.buildPanes();
if (myself.target.drawNew) {
myself.target.changed();
myself.target.drawNew();
myself.target.changed();
}
},
this,
propertyName
);
};
InspectorMorph.prototype.removeProperty = function () {
var prop = this.list.selected;
try {
delete (this.target[prop]);
this.currentProperty = null;
this.buildPanes();
if (this.target.drawNew) {
this.target.changed();
this.target.drawNew();
this.target.changed();
}
} catch (err) {
this.inform(err);
}
};
// InspectorMorph stepping
InspectorMorph.prototype.step = function () {
this.updateCurrentSelection();
var lbl = this.target.toString();
if (this.label.text === lbl) {return; }
this.label.text = lbl;
this.label.drawNew();
this.fixLayout();
};
// InspectorMorph duplicating:
InspectorMorph.prototype.updateReferences = function (map) {
var active = this.list.activeIndex();
InspectorMorph.uber.updateReferences.call(this, map);
this.buildPanes();
this.list.activateIndex(active);
};
// MenuMorph ///////////////////////////////////////////////////////////
// MenuMorph: referenced constructors
var MenuItemMorph;
// MenuMorph inherits from BoxMorph:
MenuMorph.prototype = new BoxMorph();
MenuMorph.prototype.constructor = MenuMorph;
MenuMorph.uber = BoxMorph.prototype;
// MenuMorph instance creation:
function MenuMorph(target, title, environment, fontSize) {
this.init(target, title, environment, fontSize);
/*
if target is a function, use it as callback:
execute target as callback function with the action property
of the triggered MenuItem as argument.
Use the environment, if it is specified.
Note: if action is also a function, instead of becoming
the argument itself it will be called to answer the argument.
For selections, Yes/No Choices etc.
else (if target is not a function):
if action is a function:
execute the action with target as environment (can be null)
for lambdafied (inline) actions
else if action is a String:
treat it as function property of target and execute it
for selector-like actions
*/
}
MenuMorph.prototype.init = function (target, title, environment, fontSize) {
// additional properties:
this.target = target;
this.title = title || null;
this.environment = environment || null;
this.fontSize = fontSize || null;
this.items = [];
this.label = null;
this.world = null;
this.isListContents = false;
this.hasFocus = false;
this.selection = null;
// initialize inherited properties:
MenuMorph.uber.init.call(this);
// override inherited properties:
this.isDraggable = false;
// immutable properties:
this.border = null;
this.edge = null;
};
MenuMorph.prototype.addItem = function (
labelString,
action,
hint,
color,
bold, // bool
italic, // bool
doubleClickAction // optional, when used as list contents
) {
/*
labelString is normally a single-line string. But it can also be one
of the following:
* a multi-line string (containing line breaks)
* an icon (either a Morph or a Canvas)
* a tuple of format: [icon, string]
*/
this.items.push([
localize(labelString || 'close'),
action || nop,
hint,
color,
bold || false,
italic || false,
doubleClickAction]);
};
MenuMorph.prototype.addLine = function (width) {
this.items.push([0, width || 1]);
};
MenuMorph.prototype.createLabel = function () {
var text;
if (this.label !== null) {
this.label.destroy();
}
text = new TextMorph(
localize(this.title),
this.fontSize || MorphicPreferences.menuFontSize,
MorphicPreferences.menuFontName,
true,
false,
'center'
);
text.alignment = 'center';
text.color = new Color(255, 255, 255);
text.backgroundColor = this.borderColor;
text.drawNew();
this.label = new BoxMorph(3, 0);
if (MorphicPreferences.isFlat) {
this.label.edge = 0;
}
this.label.color = this.borderColor;
this.label.borderColor = this.borderColor;
this.label.setExtent(text.extent().add(4));
this.label.drawNew();
this.label.add(text);
this.label.text = text;
};
MenuMorph.prototype.drawNew = function () {
var myself = this,
item,
fb,
x,
y,
isLine = false;
this.children.forEach(function (m) {
m.destroy();
});
this.children = [];
if (!this.isListContents) {
this.edge = MorphicPreferences.isFlat ? 0 : 5;
this.border = MorphicPreferences.isFlat ? 1 : 2;
}
this.color = new Color(255, 255, 255);
this.borderColor = new Color(60, 60, 60);
this.silentSetExtent(new Point(0, 0));
y = 2;
x = this.left() + 4;
if (!this.isListContents) {
if (this.title) {
this.createLabel();
this.label.setPosition(this.bounds.origin.add(4));
this.add(this.label);
y = this.label.bottom();
} else {
y = this.top() + 4;
}
}
y += 1;
this.items.forEach(function (tuple) {
isLine = false;
if (tuple instanceof StringFieldMorph ||
tuple instanceof ColorPickerMorph ||
tuple instanceof SliderMorph) {
item = tuple;
} else if (tuple[0] === 0) {
isLine = true;
item = new Morph();
item.color = myself.borderColor;
item.setHeight(tuple[1]);
} else {
item = new MenuItemMorph(
myself.target,
tuple[1],
tuple[0],
myself.fontSize || MorphicPreferences.menuFontSize,
MorphicPreferences.menuFontName,
myself.environment,
tuple[2], // bubble help hint
tuple[3], // color
tuple[4], // bold
tuple[5], // italic
tuple[6] // doubleclick action
);
}
if (isLine) {
y += 1;
}
item.setPosition(new Point(x, y));
myself.add(item);
y = y + item.height();
if (isLine) {
y += 1;
}
});
fb = this.fullBounds();
this.silentSetExtent(fb.extent().add(4));
this.adjustWidths();
MenuMorph.uber.drawNew.call(this);
};
MenuMorph.prototype.maxWidth = function () {
var w = 0;
if (this.parent instanceof FrameMorph) {
if (this.parent.scrollFrame instanceof ScrollFrameMorph) {
w = this.parent.scrollFrame.width();
}
}
this.children.forEach(function (item) {
if (item instanceof MenuItemMorph) {
w = Math.max(w, item.children[0].width() + 8);
} else if ((item instanceof StringFieldMorph) ||
(item instanceof ColorPickerMorph) ||
(item instanceof SliderMorph)) {
w = Math.max(w, item.width());
}
});
if (this.label) {
w = Math.max(w, this.label.width());
}
return w;
};
MenuMorph.prototype.adjustWidths = function () {
var w = this.maxWidth(),
isSelected,
myself = this;
this.children.forEach(function (item) {
item.silentSetWidth(w);
if (item instanceof MenuItemMorph) {
isSelected = (item.image === item.pressImage);
item.createBackgrounds();
if (isSelected) {
item.image = item.pressImage;
}
} else {
item.drawNew();
if (item === myself.label) {
item.text.setPosition(
item.center().subtract(
item.text.extent().floorDivideBy(2)
)
);
}
}
});
};
MenuMorph.prototype.unselectAllItems = function () {
this.children.forEach(function (item) {
if (item instanceof MenuItemMorph) {
item.image = item.normalImage;
}
});
this.changed();
};
MenuMorph.prototype.popup = function (world, pos) {
this.drawNew();
this.setPosition(pos);
this.addShadow(new Point(2, 2), 80);
this.keepWithin(world);
if (world.activeMenu) {
world.activeMenu.destroy();
}
if (this.items.length < 1 && !this.title) { // don't show empty menus
return;
}
world.add(this);
world.activeMenu = this;
this.world = world; // optionally enable keyboard support
this.fullChanged();
};
MenuMorph.prototype.popUpAtHand = function (world) {
var wrrld = world || this.world;
this.popup(wrrld, wrrld.hand.position());
};
MenuMorph.prototype.popUpCenteredAtHand = function (world) {
var wrrld = world || this.world;
this.drawNew();
this.popup(
wrrld,
wrrld.hand.position().subtract(
this.extent().floorDivideBy(2)
)
);
};
MenuMorph.prototype.popUpCenteredInWorld = function (world) {
var wrrld = world || this.world;
this.drawNew();
this.popup(
wrrld,
wrrld.center().subtract(
this.extent().floorDivideBy(2)
)
);
};
// MenuMorph keyboard accessibility
MenuMorph.prototype.getFocus = function () {
this.world.keyboardReceiver = this;
this.selection = null;
this.selectFirst();
this.hasFocus = true;
};
MenuMorph.prototype.processKeyDown = function (event) {
//console.log(event.keyCode);
switch (event.keyCode) {
case 13: // 'enter'
case 32: // 'space'
if (this.selection) {
this.selection.mouseClickLeft();
}
return;
case 27: // 'esc'
return this.destroy();
case 38: // 'up arrow'
return this.selectUp();
case 40: // 'down arrow'
return this.selectDown();
default:
nop();
}
};
MenuMorph.prototype.processKeyUp = function (event) {
nop(event);
};
MenuMorph.prototype.processKeyPress = function (event) {
nop(event);
};
MenuMorph.prototype.selectFirst = function () {
var i;
for (i = 0; i < this.children.length; i += 1) {
if (this.children[i] instanceof MenuItemMorph) {
this.select(this.children[i]);
return;
}
}
};
MenuMorph.prototype.selectUp = function () {
var triggers, idx;
triggers = this.children.filter(function (each) {
return each instanceof MenuItemMorph;
});
if (!this.selection) {
if (triggers.length) {
this.select(triggers[0]);
}
return;
}
idx = triggers.indexOf(this.selection) - 1;
if (idx < 0) {
idx = triggers.length - 1;
}
this.select(triggers[idx]);
};
MenuMorph.prototype.selectDown = function () {
var triggers, idx;
triggers = this.children.filter(function (each) {
return each instanceof MenuItemMorph;
});
if (!this.selection) {
if (triggers.length) {
this.select(triggers[0]);
}
return;
}
idx = triggers.indexOf(this.selection) + 1;
if (idx >= triggers.length) {
idx = 0;
}
this.select(triggers[idx]);
};
MenuMorph.prototype.select = function (aMenuItem) {
this.unselectAllItems();
aMenuItem.image = aMenuItem.highlightImage;
aMenuItem.changed();
this.selection = aMenuItem;
};
MenuMorph.prototype.destroy = function () {
if (this.hasFocus) {
this.world.keyboardReceiver = null;
}
MenuMorph.uber.destroy.call(this);
};
// StringMorph /////////////////////////////////////////////////////////
// I am a single line of text
// StringMorph inherits from Morph:
StringMorph.prototype = new Morph();
StringMorph.prototype.constructor = StringMorph;
StringMorph.uber = Morph.prototype;
// StringMorph instance creation:
function StringMorph(
text,
fontSize,
fontStyle,
bold,
italic,
isNumeric,
shadowOffset,
shadowColor,
color,
fontName
) {
this.init(
text,
fontSize,
fontStyle,
bold,
italic,
isNumeric,
shadowOffset,
shadowColor,
color,
fontName
);
}
StringMorph.prototype.init = function (
text,
fontSize,
fontStyle,
bold,
italic,
isNumeric,
shadowOffset,
shadowColor,
color,
fontName
) {
// additional properties:
this.text = text || ((text === '') ? '' : 'StringMorph');
this.fontSize = fontSize || 12;
this.fontName = fontName || MorphicPreferences.globalFontFamily;
this.fontStyle = fontStyle || 'sans-serif';
this.isBold = bold || false;
this.isItalic = italic || false;
this.isEditable = false;
this.isNumeric = isNumeric || false;
this.isPassword = false;
this.shadowOffset = shadowOffset || new Point(0, 0);
this.shadowColor = shadowColor || null;
this.isShowingBlanks = false;
this.blanksColor = new Color(180, 140, 140);
// additional properties for text-editing:
this.isScrollable = true; // scrolls into view when edited
this.currentlySelecting = false;
this.startMark = 0;
this.endMark = 0;
this.markedTextColor = new Color(255, 255, 255);
this.markedBackgoundColor = new Color(60, 60, 120);
// initialize inherited properties:
StringMorph.uber.init.call(this, true);
// override inherited properites:
this.color = color || new Color(0, 0, 0);
this.noticesTransparentClick = true;
this.drawNew();
};
StringMorph.prototype.toString = function () {
// e.g. 'a StringMorph("Hello World")'
return 'a ' +
(this.constructor.name ||
this.constructor.toString().split(' ')[1].split('(')[0]) +
'("' + this.text.slice(0, 30) + '...")';
};
StringMorph.prototype.password = function (letter, length) {
var ans = '',
i;
for (i = 0; i < length; i += 1) {
ans += letter;
}
return ans;
};
StringMorph.prototype.font = function () {
// answer a font string, e.g. 'bold italic 12px sans-serif'
var font = '';
if (this.isBold) {
font = font + 'bold ';
}
if (this.isItalic) {
font = font + 'italic ';
}
return font +
this.fontSize + 'px ' +
(this.fontName ? this.fontName + ', ' : '') +
this.fontStyle;
};
StringMorph.prototype.drawNew = function () {
var context, width, start, stop, i, p, c, x, y,
shadowOffset = this.shadowOffset || new Point(),
txt = this.isPassword ?
this.password('*', this.text.length) : this.text;
// initialize my surface property
this.image = newCanvas();
context = this.image.getContext('2d');
context.font = this.font();
// set my extent
width = Math.max(
context.measureText(txt).width + Math.abs(shadowOffset.x),
1
);
this.bounds.corner = this.bounds.origin.add(
new Point(
width,
fontHeight(this.fontSize) + Math.abs(shadowOffset.y)
)
);
this.image.width = width;
this.image.height = this.height();
// prepare context for drawing text
context.font = this.font();
context.textAlign = 'left';
context.textBaseline = 'bottom';
// first draw the shadow, if any
if (this.shadowColor) {
x = Math.max(shadowOffset.x, 0);
y = Math.max(shadowOffset.y, 0);
context.fillStyle = this.shadowColor.toString();
context.fillText(txt, x, fontHeight(this.fontSize) + y);
}
// now draw the actual text
x = Math.abs(Math.min(shadowOffset.x, 0));
y = Math.abs(Math.min(shadowOffset.y, 0));
context.fillStyle = this.color.toString();
if (this.isShowingBlanks) {
this.renderWithBlanks(context, x, fontHeight(this.fontSize) + y);
} else {
context.fillText(txt, x, fontHeight(this.fontSize) + y);
}
// draw the selection
start = Math.min(this.startMark, this.endMark);
stop = Math.max(this.startMark, this.endMark);
for (i = start; i < stop; i += 1) {
p = this.slotPosition(i).subtract(this.position());
c = txt.charAt(i);
context.fillStyle = this.markedBackgoundColor.toString();
context.fillRect(p.x, p.y, context.measureText(c).width + 1 + x,
fontHeight(this.fontSize) + y);
context.fillStyle = this.markedTextColor.toString();
context.fillText(c, p.x + x, fontHeight(this.fontSize) + y);
}
// notify my parent of layout change
if (this.parent) {
if (this.parent.fixLayout) {
this.parent.fixLayout();
}
}
};
StringMorph.prototype.renderWithBlanks = function (context, startX, y) {
var space = context.measureText(' ').width,
blank = newCanvas(new Point(space, this.height())),
ctx = blank.getContext('2d'),
words = this.text.split(' '),
x = startX || 0,
isFirst = true;
// create the blank form
ctx.fillStyle = this.blanksColor.toString();
ctx.arc(
space / 2,
blank.height / 2,
space / 2,
radians(0),
radians(360)
);
ctx.fill();
function drawBlank() {
context.drawImage(blank, x, 0);
x += space;
}
// render my text inserting blanks
words.forEach(function (word) {
if (!isFirst) {
drawBlank();
}
isFirst = false;
if (word !== '') {
context.fillText(word, x, y);
x += context.measureText(word).width;
}
});
};
// StringMorph measuring:
StringMorph.prototype.slotPosition = function (slot) {
// answer the position point of the given index ("slot")
// where the cursor should be placed
var txt = this.isPassword ?
this.password('*', this.text.length) : this.text,
dest = Math.min(Math.max(slot, 0), txt.length),
context = this.image.getContext('2d'),
xOffset,
x,
y,
idx;
xOffset = 0;
for (idx = 0; idx < dest; idx += 1) {
xOffset += context.measureText(txt[idx]).width;
}
this.pos = dest;
x = this.left() + xOffset;
y = this.top();
return new Point(x, y);
};
StringMorph.prototype.slotAt = function (aPoint) {
// answer the slot (index) closest to the given point taking
// in account how far from the middle of the character it is,
// so the cursor can be moved accordingly
var txt = this.isPassword ?
this.password('*', this.text.length) : this.text,
idx = 0,
charX = 0,
context = this.image.getContext('2d');
while (aPoint.x - this.left() > charX) {
charX += context.measureText(txt[idx]).width;
idx += 1;
if (idx === txt.length) {
if ((context.measureText(txt).width -
(context.measureText(txt[idx - 1]).width / 2)) <
(aPoint.x - this.left())) {
return idx;
}
}
}
// see where our click fell with respect to the middle of the char
if (aPoint.x - this.left() >
charX - context.measureText(txt[idx - 1]).width / 2) {
return idx;
} else {
return idx - 1;
}
};
StringMorph.prototype.upFrom = function (slot) {
// answer the slot above the given one
return slot;
};
StringMorph.prototype.downFrom = function (slot) {
// answer the slot below the given one
return slot;
};
StringMorph.prototype.startOfLine = function () {
// answer the first slot (index) of the line for the given slot
return 0;
};
StringMorph.prototype.endOfLine = function () {
// answer the slot (index) indicating the EOL for the given slot
return this.text.length;
};
StringMorph.prototype.previousWordFrom = function (aSlot) {
// answer the slot (index) slots indicating the position of the
// previous word to the left of aSlot
var index = aSlot - 1;
// while the current character is non-word one, we skip it, so that
// if we are in the middle of a non-alphanumeric sequence, we'll get
// right to the beginning of the previous word
while (index > 0 && !isWordChar(this.text[index])) {
index -= 1;
}
// while the current character is a word one, we skip it until we
// find the beginning of the current word
while (index > 0 && isWordChar(this.text[index - 1])) {
index -= 1;
}
return index;
};
StringMorph.prototype.nextWordFrom = function (aSlot) {
var index = aSlot;
while (index < this.endOfLine() && !isWordChar(this.text[index])) {
index += 1;
}
while (index < this.endOfLine() && isWordChar(this.text[index])) {
index += 1;
}
return index;
};
StringMorph.prototype.rawHeight = function () {
// answer my corrected fontSize
return this.height() / 1.2;
};
// StringMorph menus:
StringMorph.prototype.developersMenu = function () {
var menu = StringMorph.uber.developersMenu.call(this);
menu.addLine();
menu.addItem("edit", 'edit');
menu.addItem(
"font size...",
function () {
this.prompt(
menu.title + '\nfont\nsize:',
this.setFontSize,
this,
this.fontSize.toString(),
null,
6,
500,
true
);
},
'set this String\'s\nfont point size'
);
if (this.fontStyle !== 'serif') {
menu.addItem("serif", 'setSerif');
}
if (this.fontStyle !== 'sans-serif') {
menu.addItem("sans-serif", 'setSansSerif');
}
if (this.isBold) {
menu.addItem("normal weight", 'toggleWeight');
} else {
menu.addItem("bold", 'toggleWeight');
}
if (this.isItalic) {
menu.addItem("normal style", 'toggleItalic');
} else {
menu.addItem("italic", 'toggleItalic');
}
if (this.isShowingBlanks) {
menu.addItem("hide blanks", 'toggleShowBlanks');
} else {
menu.addItem("show blanks", 'toggleShowBlanks');
}
if (this.isPassword) {
menu.addItem("show characters", 'toggleIsPassword');
} else {
menu.addItem("hide characters", 'toggleIsPassword');
}
return menu;
};
StringMorph.prototype.toggleIsDraggable = function () {
// for context menu demo purposes
this.isDraggable = !this.isDraggable;
if (this.isDraggable) {
this.disableSelecting();
} else {
this.enableSelecting();
}
};
StringMorph.prototype.toggleShowBlanks = function () {
this.isShowingBlanks = !this.isShowingBlanks;
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.toggleWeight = function () {
this.isBold = !this.isBold;
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.toggleItalic = function () {
this.isItalic = !this.isItalic;
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.toggleIsPassword = function () {
this.isPassword = !this.isPassword;
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.setSerif = function () {
this.fontStyle = 'serif';
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.setSansSerif = function () {
this.fontStyle = 'sans-serif';
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.setFontSize = function (size) {
// for context menu demo purposes
var newSize;
if (typeof size === 'number') {
this.fontSize = Math.round(Math.min(Math.max(size, 4), 500));
} else {
newSize = parseFloat(size);
if (!isNaN(newSize)) {
this.fontSize = Math.round(
Math.min(Math.max(newSize, 4), 500)
);
}
}
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.setText = function (size) {
// for context menu demo purposes
this.text = Math.round(size).toString();
this.changed();
this.drawNew();
this.changed();
};
StringMorph.prototype.numericalSetters = function () {
// for context menu demo purposes
return [
'setLeft',
'setTop',
'setAlphaScaled',
'setFontSize',
'setText'
];
};
// StringMorph editing:
StringMorph.prototype.edit = function () {
this.root().edit(this);
};
StringMorph.prototype.selection = function () {
var start, stop;
start = Math.min(this.startMark, this.endMark);
stop = Math.max(this.startMark, this.endMark);
return this.text.slice(start, stop);
};
StringMorph.prototype.selectionStartSlot = function () {
return Math.min(this.startMark, this.endMark);
};
StringMorph.prototype.clearSelection = function () {
if (!this.currentlySelecting &&
isNil(this.startMark) &&
isNil(this.endMark)) {
return;
}
this.currentlySelecting = false;
this.startMark = null;
this.endMark = null;
this.drawNew();
this.changed();
};
StringMorph.prototype.deleteSelection = function () {
var start, stop, text;
text = this.text;
start = Math.min(this.startMark, this.endMark);
stop = Math.max(this.startMark, this.endMark);
this.text = text.slice(0, start) + text.slice(stop);
this.changed();
this.clearSelection();
};
StringMorph.prototype.selectAll = function () {
var cursor;
if (this.isEditable) {
this.startMark = 0;
cursor = this.root().cursor;
if (cursor) {
cursor.gotoSlot(this.text.length);
}
this.endMark = this.text.length;
this.drawNew();
this.changed();
}
};
StringMorph.prototype.mouseDownLeft = function (pos) {
if (this.world().currentKey === 16) {
this.shiftClick(pos);
} else if (this.isEditable) {
this.clearSelection();
} else {
this.escalateEvent('mouseDownLeft', pos);
}
};
StringMorph.prototype.shiftClick = function (pos) {
var cursor = this.root().cursor;
if (cursor) {
if (!this.startMark) {
this.startMark = cursor.slot;
}
cursor.gotoPos(pos);
this.endMark = cursor.slot;
this.drawNew();
this.changed();
}
this.currentlySelecting = false;
this.escalateEvent('mouseDownLeft', pos);
};
StringMorph.prototype.mouseClickLeft = function (pos) {
var cursor;
if (this.isEditable) {
if (!this.currentlySelecting) {
this.edit(); // creates a new cursor
}
cursor = this.root().cursor;
if (cursor) {
cursor.gotoPos(pos);
}
this.currentlySelecting = true;
} else {
this.escalateEvent('mouseClickLeft', pos);
}
};
StringMorph.prototype.mouseDoubleClick = function (pos) {
// selects the word at pos
// if there is no word, we select whatever is between
// the previous and next words
var slot = this.slotAt(pos);
if (this.isEditable) {
this.edit();
if (slot === this.text.length) {
slot -= 1;
}
if (isWordChar(this.text[slot])) {
this.selectWordAt(slot);
} else {
this.selectBetweenWordsAt(slot);
}
} else {
this.escalateEvent('mouseDoubleClick', pos);
}
};
StringMorph.prototype.selectWordAt = function (slot) {
var cursor = this.root().cursor;
if (slot === 0 || isWordChar(this.text[slot - 1])) {
cursor.gotoSlot(this.previousWordFrom(slot));
this.startMark = cursor.slot;
this.endMark = this.nextWordFrom(cursor.slot);
} else {
cursor.gotoSlot(slot);
this.startMark = slot;
this.endMark = this.nextWordFrom(slot);
}
this.drawNew();
this.changed();
};
StringMorph.prototype.selectBetweenWordsAt = function (slot) {
var cursor = this.root().cursor;
cursor.gotoSlot(this.nextWordFrom(this.previousWordFrom(slot)));
this.startMark = cursor.slot;
this.endMark = cursor.slot;
while (this.endMark < this.text.length
&& !isWordChar(this.text[this.endMark])) {
this.endMark += 1;
}
this.drawNew();
this.changed();
};
StringMorph.prototype.enableSelecting = function () {
this.mouseDownLeft = function (pos) {
var crs = this.root().cursor,
already = crs ? crs.target === this : false;
if (this.world().currentKey === 16) {
this.shiftClick(pos);
} else {
this.clearSelection();
if (this.isEditable && (!this.isDraggable)) {
this.edit();
this.root().cursor.gotoPos(pos);
this.startMark = this.slotAt(pos);
this.endMark = this.startMark;
this.currentlySelecting = true;
if (!already) {this.escalateEvent('mouseDownLeft', pos); }
}
}
};
this.mouseMove = function (pos) {
if (this.isEditable &&
this.currentlySelecting &&
(!this.isDraggable)) {
var newMark = this.slotAt(pos);
if (newMark !== this.endMark) {
this.endMark = newMark;
this.drawNew();
this.changed();
}
}
};
};
StringMorph.prototype.disableSelecting = function () {
this.mouseDownLeft = StringMorph.prototype.mouseDownLeft;
delete this.mouseMove;
};
// TextMorph ////////////////////////////////////////////////////////////////
// I am a multi-line, word-wrapping String, quasi-inheriting from StringMorph
// TextMorph inherits from Morph:
TextMorph.prototype = new Morph();
TextMorph.prototype.constructor = TextMorph;
TextMorph.uber = Morph.prototype;
// TextMorph instance creation:
function TextMorph(
text,
fontSize,
fontStyle,
bold,
italic,
alignment,
width,
fontName,
shadowOffset,
shadowColor
) {
this.init(text,
fontSize,
fontStyle,
bold,
italic,
alignment,
width,
fontName,
shadowOffset,
shadowColor);
}
TextMorph.prototype.init = function (
text,
fontSize,
fontStyle,
bold,
italic,
alignment,
width,
fontName,
shadowOffset,
shadowColor
) {
// additional properties:
this.text = text || (text === '' ? text : 'TextMorph');
this.words = [];
this.lines = [];
this.lineSlots = [];
this.fontSize = fontSize || 12;
this.fontName = fontName || MorphicPreferences.globalFontFamily;
this.fontStyle = fontStyle || 'sans-serif';
this.isBold = bold || false;
this.isItalic = italic || false;
this.alignment = alignment || 'left';
this.shadowOffset = shadowOffset || new Point(0, 0);
this.shadowColor = shadowColor || null;
this.maxWidth = width || 0;
this.maxLineWidth = 0;
this.backgroundColor = null;
this.isEditable = false;
//additional properties for ad-hoc evaluation:
this.receiver = null;
// additional properties for text-editing:
this.isScrollable = true; // scrolls into view when edited
this.currentlySelecting = false;
this.startMark = 0;
this.endMark = 0;
this.markedTextColor = new Color(255, 255, 255);
this.markedBackgoundColor = new Color(60, 60, 120);
// initialize inherited properties:
TextMorph.uber.init.call(this);
// override inherited properites:
this.color = new Color(0, 0, 0);
this.noticesTransparentClick = true;
this.drawNew();
};
TextMorph.prototype.toString = function () {
// e.g. 'a TextMorph("Hello World")'
return 'a TextMorph' + '("' + this.text.slice(0, 30) + '...")';
};
TextMorph.prototype.font = StringMorph.prototype.font;
TextMorph.prototype.parse = function () {
var myself = this,
paragraphs = this.text.split('\n'),
canvas = newCanvas(),
context = canvas.getContext('2d'),
oldline = '',
newline,
w,
slot = 0;
context.font = this.font();
this.maxLineWidth = 0;
this.lines = [];
this.lineSlots = [0];
this.words = [];
paragraphs.forEach(function (p) {
myself.words = myself.words.concat(p.split(' '));
myself.words.push('\n');
});
this.words.forEach(function (word) {
if (word === '\n') {
myself.lines.push(oldline);
myself.lineSlots.push(slot);
myself.maxLineWidth = Math.max(
myself.maxLineWidth,
context.measureText(oldline).width
);
oldline = '';
} else {
if (myself.maxWidth > 0) {
newline = oldline + word + ' ';
w = context.measureText(newline).width;
if (w > myself.maxWidth) {
myself.lines.push(oldline);
myself.lineSlots.push(slot);
myself.maxLineWidth = Math.max(
myself.maxLineWidth,
context.measureText(oldline).width
);
oldline = word + ' ';
} else {
oldline = newline;
}
} else {
oldline = oldline + word + ' ';
}
slot += word.length + 1;
}
});
};
TextMorph.prototype.drawNew = function () {
var context, height, i, line, width, shadowHeight, shadowWidth,
offx, offy, x, y, start, stop, p, c;
this.image = newCanvas();
context = this.image.getContext('2d');
context.font = this.font();
this.parse();
// set my extent
shadowWidth = Math.abs(this.shadowOffset.x);
shadowHeight = Math.abs(this.shadowOffset.y);
height = this.lines.length * (fontHeight(this.fontSize) + shadowHeight);
if (this.maxWidth === 0) {
this.bounds = this.bounds.origin.extent(
new Point(this.maxLineWidth + shadowWidth, height)
);
} else {
this.bounds = this.bounds.origin.extent(
new Point(this.maxWidth + shadowWidth, height)
);
}
this.image.width = this.width();
this.image.height = this.height();
// prepare context for drawing text
context = this.image.getContext('2d');
context.font = this.font();
context.textAlign = 'left';
context.textBaseline = 'bottom';
// fill the background, if desired
if (this.backgroundColor) {
context.fillStyle = this.backgroundColor.toString();
context.fillRect(0, 0, this.width(), this.height());
}
// draw the shadow, if any
if (this.shadowColor) {
offx = Math.max(this.shadowOffset.x, 0);
offy = Math.max(this.shadowOffset.y, 0);
context.fillStyle = this.shadowColor.toString();
for (i = 0; i < this.lines.length; i = i + 1) {
line = this.lines[i];
width = context.measureText(line).width + shadowWidth;
if (this.alignment === 'right') {
x = this.width() - width;
} else if (this.alignment === 'center') {
x = (this.width() - width) / 2;
} else { // 'left'
x = 0;
}
y = (i + 1) * (fontHeight(this.fontSize) + shadowHeight)
- shadowHeight;
context.fillText(line, x + offx, y + offy);
}
}
// now draw the actual text
offx = Math.abs(Math.min(this.shadowOffset.x, 0));
offy = Math.abs(Math.min(this.shadowOffset.y, 0));
context.fillStyle = this.color.toString();
for (i = 0; i < this.lines.length; i = i + 1) {
line = this.lines[i];
width = context.measureText(line).width + shadowWidth;
if (this.alignment === 'right') {
x = this.width() - width;
} else if (this.alignment === 'center') {
x = (this.width() - width) / 2;
} else { // 'left'
x = 0;
}
y = (i + 1) * (fontHeight(this.fontSize) + shadowHeight)
- shadowHeight;
context.fillText(line, x + offx, y + offy);
}
// draw the selection
start = Math.min(this.startMark, this.endMark);
stop = Math.max(this.startMark, this.endMark);
for (i = start; i < stop; i += 1) {
p = this.slotPosition(i).subtract(this.position());
c = this.text.charAt(i);
context.fillStyle = this.markedBackgoundColor.toString();
context.fillRect(p.x, p.y, context.measureText(c).width + 1,
fontHeight(this.fontSize));
context.fillStyle = this.markedTextColor.toString();
context.fillText(c, p.x, p.y + fontHeight(this.fontSize));
}
// notify my parent of layout change
if (this.parent) {
if (this.parent.layoutChanged) {
this.parent.layoutChanged();
}
}
};
TextMorph.prototype.setExtent = function (aPoint) {
this.maxWidth = Math.max(aPoint.x, 0);
this.changed();
this.drawNew();
};
// TextMorph mesuring:
TextMorph.prototype.columnRow = function (slot) {
// answer the logical position point of the given index ("slot")
var row,
col,
idx = 0;
for (row = 0; row < this.lines.length; row += 1) {
idx = this.lineSlots[row];
for (col = 0; col < this.lines[row].length; col += 1) {
if (idx === slot) {
return new Point(col, row);
}
idx += 1;
}
}
// return new Point(0, 0);
return new Point(
this.lines[this.lines.length - 1].length - 1,
this.lines.length - 1
);
};
TextMorph.prototype.slotPosition = function (slot) {
// answer the physical position point of the given index ("slot")
// where the cursor should be placed
var colRow = this.columnRow(slot),
context = this.image.getContext('2d'),
shadowHeight = Math.abs(this.shadowOffset.y),
xOffset = 0,
yOffset,
x,
y,
idx;
yOffset = colRow.y * (fontHeight(this.fontSize) + shadowHeight);
for (idx = 0; idx < colRow.x; idx += 1) {
xOffset += context.measureText(this.lines[colRow.y][idx]).width;
}
x = this.left() + xOffset;
y = this.top() + yOffset;
return new Point(x, y);
};
TextMorph.prototype.slotAt = function (aPoint) {
// answer the slot (index) closest to the given point taking
// in account how far from the middle of the character it is,
// so the cursor can be moved accordingly
var charX = 0,
row = 0,
col = 0,
shadowHeight = Math.abs(this.shadowOffset.y),
context = this.image.getContext('2d');
while (aPoint.y - this.top() >
((fontHeight(this.fontSize) + shadowHeight) * row)) {
row += 1;
}
row = Math.max(row, 1);
while (aPoint.x - this.left() > charX) {
charX += context.measureText(this.lines[row - 1][col]).width;
col += 1;
}
// see where our click fell with respect to the middle of the char
if (aPoint.x - this.left() >
charX - context.measureText(this.lines[row - 1][col]).width / 2) {
return this.lineSlots[Math.max(row - 1, 0)] + col;
} else {
return this.lineSlots[Math.max(row - 1, 0)] + col - 1;
}
};
TextMorph.prototype.upFrom = function (slot) {
// answer the slot above the given one
var above,
colRow = this.columnRow(slot);
if (colRow.y < 1) {
return slot;
}
above = this.lines[colRow.y - 1];
if (above.length < colRow.x - 1) {
return this.lineSlots[colRow.y - 1] + above.length;
}
return this.lineSlots[colRow.y - 1] + colRow.x;
};
TextMorph.prototype.downFrom = function (slot) {
// answer the slot below the given one
var below,
colRow = this.columnRow(slot);
if (colRow.y > this.lines.length - 2) {
return slot;
}
below = this.lines[colRow.y + 1];
if (below.length < colRow.x - 1) {
return this.lineSlots[colRow.y + 1] + below.length;
}
return this.lineSlots[colRow.y + 1] + colRow.x;
};
TextMorph.prototype.startOfLine = function (slot) {
// answer the first slot (index) of the line for the given slot
return this.lineSlots[this.columnRow(slot).y];
};
TextMorph.prototype.endOfLine = function (slot) {
// answer the slot (index) indicating the EOL for the given slot
return this.startOfLine(slot) +
this.lines[this.columnRow(slot).y].length - 1;
};
TextMorph.prototype.previousWordFrom = StringMorph.prototype.previousWordFrom;
TextMorph.prototype.nextWordFrom = StringMorph.prototype.nextWordFrom;
// TextMorph editing:
TextMorph.prototype.edit = StringMorph.prototype.edit;
TextMorph.prototype.selection = StringMorph.prototype.selection;
TextMorph.prototype.selectionStartSlot
= StringMorph.prototype.selectionStartSlot;
TextMorph.prototype.clearSelection = StringMorph.prototype.clearSelection;
TextMorph.prototype.deleteSelection = StringMorph.prototype.deleteSelection;
TextMorph.prototype.selectAll = StringMorph.prototype.selectAll;
TextMorph.prototype.mouseDownLeft = StringMorph.prototype.mouseDownLeft;
TextMorph.prototype.shiftClick = StringMorph.prototype.shiftClick;
TextMorph.prototype.mouseClickLeft = StringMorph.prototype.mouseClickLeft;
TextMorph.prototype.mouseDoubleClick = StringMorph.prototype.mouseDoubleClick;
TextMorph.prototype.selectWordAt = StringMorph.prototype.selectWordAt;
TextMorph.prototype.selectBetweenWordsAt
= StringMorph.prototype.selectBetweenWordsAt;
TextMorph.prototype.enableSelecting = StringMorph.prototype.enableSelecting;
TextMorph.prototype.disableSelecting = StringMorph.prototype.disableSelecting;
TextMorph.prototype.selectAllAndEdit = function () {
this.edit();
this.selectAll();
};
// TextMorph menus:
TextMorph.prototype.developersMenu = function () {
var menu = TextMorph.uber.developersMenu.call(this);
menu.addLine();
menu.addItem("edit", 'edit');
menu.addItem(
"font size...",
function () {
this.prompt(
menu.title + '\nfont\nsize:',
this.setFontSize,
this,
this.fontSize.toString(),
null,
6,
100,
true
);
},
'set this Text\'s\nfont point size'
);
if (this.alignment !== 'left') {
menu.addItem("align left", 'setAlignmentToLeft');
}
if (this.alignment !== 'right') {
menu.addItem("align right", 'setAlignmentToRight');
}
if (this.alignment !== 'center') {
menu.addItem("align center", 'setAlignmentToCenter');
}
menu.addLine();
if (this.fontStyle !== 'serif') {
menu.addItem("serif", 'setSerif');
}
if (this.fontStyle !== 'sans-serif') {
menu.addItem("sans-serif", 'setSansSerif');
}
if (this.isBold) {
menu.addItem("normal weight", 'toggleWeight');
} else {
menu.addItem("bold", 'toggleWeight');
}
if (this.isItalic) {
menu.addItem("normal style", 'toggleItalic');
} else {
menu.addItem("italic", 'toggleItalic');
}
return menu;
};
TextMorph.prototype.setAlignmentToLeft = function () {
this.alignment = 'left';
this.drawNew();
this.changed();
};
TextMorph.prototype.setAlignmentToRight = function () {
this.alignment = 'right';
this.drawNew();
this.changed();
};
TextMorph.prototype.setAlignmentToCenter = function () {
this.alignment = 'center';
this.drawNew();
this.changed();
};
TextMorph.prototype.toggleIsDraggable
= StringMorph.prototype.toggleIsDraggable;
TextMorph.prototype.toggleWeight = StringMorph.prototype.toggleWeight;
TextMorph.prototype.toggleItalic = StringMorph.prototype.toggleItalic;
TextMorph.prototype.setSerif = StringMorph.prototype.setSerif;
TextMorph.prototype.setSansSerif = StringMorph.prototype.setSansSerif;
TextMorph.prototype.setText = StringMorph.prototype.setText;
TextMorph.prototype.setFontSize = StringMorph.prototype.setFontSize;
TextMorph.prototype.numericalSetters = StringMorph.prototype.numericalSetters;
// TextMorph evaluation:
TextMorph.prototype.evaluationMenu = function () {
var menu = new MenuMorph(this, null);
menu.addItem(
"do it",
'doIt',
'evaluate the\nselected expression'
);
menu.addItem(
"show it",
'showIt',
'evaluate the\nselected expression\nand show the result'
);
menu.addItem(
"inspect it",
'inspectIt',
'evaluate the\nselected expression\nand inspect the result'
);
menu.addLine();
menu.addItem("select all", 'selectAllAndEdit');
return menu;
};
TextMorph.prototype.setReceiver = function (obj) {
this.receiver = obj;
this.customContextMenu = this.evaluationMenu();
};
TextMorph.prototype.doIt = function () {
this.receiver.evaluateString(this.selection());
this.edit();
};
TextMorph.prototype.showIt = function () {
var result = this.receiver.evaluateString(this.selection());
if (result !== null) {
this.inform(result);
}
};
TextMorph.prototype.inspectIt = function () {
var result = this.receiver.evaluateString(this.selection()),
world = this.world(),
inspector;
if (isObject(result)) {
inspector = new InspectorMorph(result);
inspector.setPosition(world.hand.position());
inspector.keepWithin(world);
world.add(inspector);
inspector.changed();
}
};
// TriggerMorph ////////////////////////////////////////////////////////
// I provide basic button functionality
// TriggerMorph inherits from Morph:
TriggerMorph.prototype = new Morph();
TriggerMorph.prototype.constructor = TriggerMorph;
TriggerMorph.uber = Morph.prototype;
// TriggerMorph instance creation:
function TriggerMorph(
target,
action,
labelString,
fontSize,
fontStyle,
environment,
hint,
labelColor,
labelBold,
labelItalic,
doubleClickAction
) {
this.init(
target,
action,
labelString,
fontSize,
fontStyle,
environment,
hint,
labelColor,
labelBold,
labelItalic,
doubleClickAction
);
}
TriggerMorph.prototype.init = function (
target,
action,
labelString,
fontSize,
fontStyle,
environment,
hint,
labelColor,
labelBold,
labelItalic,
doubleClickAction
) {
// additional properties:
this.target = target || null;
this.action = action || null;
this.doubleClickAction = doubleClickAction || null;
this.environment = environment || null;
this.labelString = labelString || null;
this.label = null;
this.hint = hint || null; // null, String, or Function
this.fontSize = fontSize || MorphicPreferences.menuFontSize;
this.fontStyle = fontStyle || 'sans-serif';
this.highlightColor = new Color(192, 192, 192);
this.pressColor = new Color(128, 128, 128);
this.labelColor = labelColor || new Color(0, 0, 0);
this.labelBold = labelBold || false;
this.labelItalic = labelItalic || false;
// initialize inherited properties:
TriggerMorph.uber.init.call(this);
// override inherited properites:
this.color = new Color(255, 255, 255);
this.drawNew();
};
// TriggerMorph drawing:
TriggerMorph.prototype.drawNew = function () {
this.createBackgrounds();
if (this.labelString !== null) {
this.createLabel();
}
};
TriggerMorph.prototype.createBackgrounds = function () {
var context,
ext = this.extent();
this.normalImage = newCanvas(ext);
context = this.normalImage.getContext('2d');
context.fillStyle = this.color.toString();
context.fillRect(0, 0, ext.x, ext.y);
this.highlightImage = newCanvas(ext);
context = this.highlightImage.getContext('2d');
context.fillStyle = this.highlightColor.toString();
context.fillRect(0, 0, ext.x, ext.y);
this.pressImage = newCanvas(ext);
context = this.pressImage.getContext('2d');
context.fillStyle = this.pressColor.toString();
context.fillRect(0, 0, ext.x, ext.y);
this.image = this.normalImage;
};
TriggerMorph.prototype.createLabel = function () {
if (this.label !== null) {
this.label.destroy();
}
this.label = new StringMorph(
this.labelString,
this.fontSize,
this.fontStyle,
this.labelBold,
this.labelItalic,
false, // numeric
null, // shadow offset
null, // shadow color
this.labelColor
);
this.label.setPosition(
this.center().subtract(
this.label.extent().floorDivideBy(2)
)
);
this.add(this.label);
};
// TriggerMorph action:
TriggerMorph.prototype.trigger = function () {
/*
if target is a function, use it as callback:
execute target as callback function with action as argument
in the environment as optionally specified.
Note: if action is also a function, instead of becoming
the argument itself it will be called to answer the argument.
for selections, Yes/No Choices etc. As second argument pass
myself, so I can be modified to reflect status changes, e.g.
inside a list box:
else (if target is not a function):
if action is a function:
execute the action with target as environment (can be null)
for lambdafied (inline) actions
else if action is a String:
treat it as function property of target and execute it
for selector-like actions
*/
if (typeof this.target === 'function') {
if (typeof this.action === 'function') {
this.target.call(this.environment, this.action.call(), this);
} else {
this.target.call(this.environment, this.action, this);
}
} else {
if (typeof this.action === 'function') {
this.action.call(this.target);
} else { // assume it's a String
this.target[this.action]();
}
}
};
TriggerMorph.prototype.triggerDoubleClick = function () {
// same as trigger() but use doubleClickAction instead of action property
// note that specifying a doubleClickAction is optional
if (!this.doubleClickAction) {return; }
if (typeof this.target === 'function') {
if (typeof this.doubleClickAction === 'function') {
this.target.call(
this.environment,
this.doubleClickAction.call(),
this
);
} else {
this.target.call(this.environment, this.doubleClickAction, this);
}
} else {
if (typeof this.doubleClickAction === 'function') {
this.doubleClickAction.call(this.target);
} else { // assume it's a String
this.target[this.doubleClickAction]();
}
}
};
// TriggerMorph events:
TriggerMorph.prototype.mouseEnter = function () {
var contents = this.hint instanceof Function ? this.hint() : this.hint;
this.image = this.highlightImage;
this.changed();
if (contents) {
this.bubbleHelp(contents);
}
};
TriggerMorph.prototype.mouseLeave = function () {
this.image = this.normalImage;
this.changed();
if (this.hint) {
this.world().hand.destroyTemporaries();
}
};
TriggerMorph.prototype.mouseDownLeft = function () {
this.image = this.pressImage;
this.changed();
};
TriggerMorph.prototype.mouseClickLeft = function () {
this.image = this.highlightImage;
this.changed();
this.trigger();
};
TriggerMorph.prototype.mouseDoubleClick = function () {
this.triggerDoubleClick();
};
TriggerMorph.prototype.rootForGrab = function () {
return this.isDraggable ? TriggerMorph.uber.rootForGrab.call(this) : null;
};
// TriggerMorph bubble help:
TriggerMorph.prototype.bubbleHelp = function (contents) {
var myself = this;
this.fps = 2;
this.step = function () {
if (this.bounds.containsPoint(this.world().hand.position())) {
myself.popUpbubbleHelp(contents);
}
myself.fps = 0;
delete myself.step;
};
};
TriggerMorph.prototype.popUpbubbleHelp = function (contents) {
new SpeechBubbleMorph(
localize(contents),
null,
null,
1
).popUp(this.world(), this.rightCenter().add(new Point(-8, 0)));
};
// MenuItemMorph ///////////////////////////////////////////////////////
// I automatically determine my bounds
var MenuItemMorph;
// MenuItemMorph inherits from TriggerMorph:
MenuItemMorph.prototype = new TriggerMorph();
MenuItemMorph.prototype.constructor = MenuItemMorph;
MenuItemMorph.uber = TriggerMorph.prototype;
// MenuItemMorph instance creation:
function MenuItemMorph(
target,
action,
labelString, // can also be a Morph or a Canvas or a tuple: [icon, string]
fontSize,
fontStyle,
environment,
hint,
color,
bold,
italic,
doubleClickAction // optional when used as list morph item
) {
this.init(
target,
action,
labelString,
fontSize,
fontStyle,
environment,
hint,
color,
bold,
italic,
doubleClickAction
);
}
MenuItemMorph.prototype.createLabel = function () {
var icon, lbl, np;
if (this.label !== null) {
this.label.destroy();
}
if (isString(this.labelString)) {
this.label = this.createLabelString(this.labelString);
} else if (this.labelString instanceof Array) {
// assume its pattern is: [icon, string]
this.label = new Morph();
this.label.alpha = 0; // transparent
icon = this.createIcon(this.labelString[0]);
this.label.add(icon);
lbl = this.createLabelString(this.labelString[1]);
this.label.add(lbl);
lbl.setCenter(icon.center());
lbl.setLeft(icon.right() + 4);
this.label.bounds = (icon.bounds.merge(lbl.bounds));
this.label.drawNew();
} else { // assume it's either a Morph or a Canvas
this.label = this.createIcon(this.labelString);
}
this.silentSetExtent(this.label.extent().add(new Point(8, 0)));
np = this.position().add(new Point(4, 0));
this.label.bounds = np.extent(this.label.extent());
this.add(this.label);
};
MenuItemMorph.prototype.createIcon = function (source) {
// source can be either a Morph or an HTMLCanvasElement
var icon = new Morph(),
src;
icon.image = source instanceof Morph ? source.fullImage() : source;
// adjust shadow dimensions
if (source instanceof Morph && source.getShadow()) {
src = icon.image;
icon.image = newCanvas(
source.fullBounds().extent().subtract(
this.shadowBlur * (useBlurredShadows ? 1 : 2)
)
);
icon.image.getContext('2d').drawImage(src, 0, 0);
}
icon.silentSetWidth(icon.image.width);
icon.silentSetHeight(icon.image.height);
return icon;
};
MenuItemMorph.prototype.createLabelString = function (string) {
var lbl = new TextMorph(
string,
this.fontSize,
this.fontStyle,
this.labelBold,
this.labelItalic
);
lbl.setColor(this.labelColor);
return lbl;
};
// MenuItemMorph events:
MenuItemMorph.prototype.mouseEnter = function () {
if (!this.isListItem()) {
this.image = this.highlightImage;
this.changed();
}
if (this.hint) {
this.bubbleHelp(this.hint);
}
};
MenuItemMorph.prototype.mouseLeave = function () {
if (!this.isListItem()) {
this.image = this.normalImage;
this.changed();
}
if (this.hint) {
this.world().hand.destroyTemporaries();
}
};
MenuItemMorph.prototype.mouseDownLeft = function (pos) {
if (this.isListItem()) {
this.parent.unselectAllItems();
this.escalateEvent('mouseDownLeft', pos);
}
this.image = this.pressImage;
this.changed();
};
MenuItemMorph.prototype.mouseMove = function () {
if (this.isListItem()) {
this.escalateEvent('mouseMove');
}
};
MenuItemMorph.prototype.mouseClickLeft = function () {
if (!this.isListItem()) {
this.parent.destroy();
this.root().activeMenu = null;
}
this.trigger();
};
MenuItemMorph.prototype.isListItem = function () {
if (this.parent) {
return this.parent.isListContents;
}
return false;
};
MenuItemMorph.prototype.isSelectedListItem = function () {
if (this.isListItem()) {
return this.image === this.pressImage;
}
return false;
};
// FrameMorph //////////////////////////////////////////////////////////
// I clip my submorphs at my bounds
// Frames inherit from Morph:
FrameMorph.prototype = new Morph();
FrameMorph.prototype.constructor = FrameMorph;
FrameMorph.uber = Morph.prototype;
function FrameMorph(aScrollFrame) {
this.init(aScrollFrame);
}
FrameMorph.prototype.init = function (aScrollFrame) {
this.scrollFrame = aScrollFrame || null;
FrameMorph.uber.init.call(this);
this.color = new Color(255, 250, 245);
this.drawNew();
this.acceptsDrops = true;
if (this.scrollFrame) {
this.isDraggable = false;
this.noticesTransparentClick = false;
this.alpha = 0;
}
};
FrameMorph.prototype.fullBounds = function () {
var shadow = this.getShadow();
if (shadow !== null) {
return this.bounds.merge(shadow.bounds);
}
return this.bounds;
};
FrameMorph.prototype.fullImage = function () {
// use only for shadows
return this.image;
};
FrameMorph.prototype.fullDrawOn = function (aCanvas, aRect) {
var rectangle, dirty;
if (!this.isVisible) {
return null;
}
rectangle = aRect || this.fullBounds();
dirty = this.bounds.intersect(rectangle);
if (!dirty.extent().gt(new Point(0, 0))) {
return null;
}
this.drawOn(aCanvas, dirty);
this.children.forEach(function (child) {
if (child instanceof ShadowMorph) {
child.fullDrawOn(aCanvas, rectangle);
} else {
child.fullDrawOn(aCanvas, dirty);
}
});
};
// FrameMorph navigation:
FrameMorph.prototype.topMorphAt = function (point) {
var i, result;
if (!(this.isVisible && this.bounds.containsPoint(point))) {
return null;
}
for (i = this.children.length - 1; i >= 0; i -= 1) {
result = this.children[i].topMorphAt(point);
if (result) {return result; }
}
return this.noticesTransparentClick ||
!this.isTransparentAt(point) ? this : null;
};
// FrameMorph scrolling support:
FrameMorph.prototype.submorphBounds = function () {
var result = null;
if (this.children.length > 0) {
result = this.children[0].bounds;
this.children.forEach(function (child) {
result = result.merge(child.fullBounds());
});
}
return result;
};
FrameMorph.prototype.keepInScrollFrame = function () {
if (this.scrollFrame === null) {
return null;
}
if (this.left() > this.scrollFrame.left()) {
this.moveBy(
new Point(this.scrollFrame.left() - this.left(), 0)
);
}
if (this.right() < this.scrollFrame.right()) {
this.moveBy(
new Point(this.scrollFrame.right() - this.right(), 0)
);
}
if (this.top() > this.scrollFrame.top()) {
this.moveBy(
new Point(0, this.scrollFrame.top() - this.top())
);
}
if (this.bottom() < this.scrollFrame.bottom()) {
this.moveBy(
0,
new Point(this.scrollFrame.bottom() - this.bottom(), 0)
);
}
};
FrameMorph.prototype.adjustBounds = function () {
var subBounds,
newBounds,
myself = this;
if (this.scrollFrame === null) {
return null;
}
subBounds = this.submorphBounds();
if (subBounds && (!this.scrollFrame.isTextLineWrapping)) {
newBounds = subBounds
.expandBy(this.scrollFrame.padding)
.growBy(this.scrollFrame.growth)
.merge(this.scrollFrame.bounds);
} else {
newBounds = this.scrollFrame.bounds.copy();
}
if (!this.bounds.eq(newBounds)) {
this.bounds = newBounds;
this.drawNew();
this.keepInScrollFrame();
}
if (this.scrollFrame.isTextLineWrapping) {
this.children.forEach(function (morph) {
if (morph instanceof TextMorph) {
morph.setWidth(myself.width());
myself.setHeight(
Math.max(morph.height(), myself.scrollFrame.height())
);
}
});
}
this.scrollFrame.adjustScrollBars();
};
// FrameMorph dragging & dropping of contents:
FrameMorph.prototype.reactToDropOf = function () {
this.adjustBounds();
};
FrameMorph.prototype.reactToGrabOf = function () {
this.adjustBounds();
};
// FrameMorph menus:
FrameMorph.prototype.developersMenu = function () {
var menu = FrameMorph.uber.developersMenu.call(this);
if (this.children.length > 0) {
menu.addLine();
menu.addItem(
"move all inside...",
'keepAllSubmorphsWithin',
'keep all submorphs\nwithin and visible'
);
}
return menu;
};
FrameMorph.prototype.keepAllSubmorphsWithin = function () {
var myself = this;
this.children.forEach(function (m) {
m.keepWithin(myself);
});
};
// ScrollFrameMorph ////////////////////////////////////////////////////
ScrollFrameMorph.prototype = new FrameMorph();
ScrollFrameMorph.prototype.constructor = ScrollFrameMorph;
ScrollFrameMorph.uber = FrameMorph.prototype;
function ScrollFrameMorph(scroller, size, sliderColor) {
this.init(scroller, size, sliderColor);
}
ScrollFrameMorph.prototype.init = function (scroller, size, sliderColor) {
var myself = this;
ScrollFrameMorph.uber.init.call(this);
this.scrollBarSize = size || MorphicPreferences.scrollBarSize;
this.autoScrollTrigger = null;
this.enableAutoScrolling = true; // change to suppress
this.isScrollingByDragging = true; // change to suppress
this.hasVelocity = true; // dto.
this.padding = 0; // around the scrollable area
this.growth = 0; // pixels or Point to grow right/left when near edge
this.isTextLineWrapping = false;
this.contents = scroller || new FrameMorph(this);
this.add(this.contents);
this.hBar = new SliderMorph(
null, // start
null, // stop
null, // value
null, // size
'horizontal',
sliderColor
);
this.hBar.setHeight(this.scrollBarSize);
this.hBar.action = function (num) {
myself.contents.setPosition(
new Point(
myself.left() - num,
myself.contents.position().y
)
);
};
this.hBar.isDraggable = false;
this.add(this.hBar);
this.vBar = new SliderMorph(
null, // start
null, // stop
null, // value
null, // size
'vertical',
sliderColor
);
this.vBar.setWidth(this.scrollBarSize);
this.vBar.action = function (num) {
myself.contents.setPosition(
new Point(
myself.contents.position().x,
myself.top() - num
)
);
};
this.vBar.isDraggable = false;
this.add(this.vBar);
};
ScrollFrameMorph.prototype.adjustScrollBars = function () {
var hWidth = this.width() - this.scrollBarSize,
vHeight = this.height() - this.scrollBarSize;
this.changed();
if (this.contents.width() > this.width() +
MorphicPreferences.scrollBarSize) {
this.hBar.show();
if (this.hBar.width() !== hWidth) {
this.hBar.setWidth(hWidth);
}
this.hBar.setPosition(
new Point(
this.left(),
this.bottom() - this.hBar.height()
)
);
this.hBar.start = 0;
this.hBar.stop = this.contents.width() - this.width();
this.hBar.size =
this.width() / this.contents.width() * this.hBar.stop;
this.hBar.value = this.left() - this.contents.left();
this.hBar.drawNew();
} else {
this.hBar.hide();
}
if (this.contents.height() > this.height() +
this.scrollBarSize) {
this.vBar.show();
if (this.vBar.height() !== vHeight) {
this.vBar.setHeight(vHeight);
}
this.vBar.setPosition(
new Point(
this.right() - this.vBar.width(),
this.top()
)
);
this.vBar.start = 0;
this.vBar.stop = this.contents.height() - this.height();
this.vBar.size =
this.height() / this.contents.height() * this.vBar.stop;
this.vBar.value = this.top() - this.contents.top();
this.vBar.drawNew();
} else {
this.vBar.hide();
}
};
ScrollFrameMorph.prototype.addContents = function (aMorph) {
this.contents.add(aMorph);
this.contents.adjustBounds();
};
ScrollFrameMorph.prototype.setContents = function (aMorph) {
this.contents.children.forEach(function (m) {
m.destroy();
});
this.contents.children = [];
aMorph.setPosition(this.position().add(this.padding + 2));
this.addContents(aMorph);
};
ScrollFrameMorph.prototype.setExtent = function (aPoint) {
if (this.isTextLineWrapping) {
this.contents.setPosition(this.position().copy());
}
ScrollFrameMorph.uber.setExtent.call(this, aPoint);
this.contents.adjustBounds();
};
// ScrollFrameMorph scrolling by dragging:
ScrollFrameMorph.prototype.scrollX = function (steps) {
var cl = this.contents.left(),
l = this.left(),
cw = this.contents.width(),
r = this.right(),
newX;
newX = cl + steps;
if (newX + cw < r) {
newX = r - cw;
}
if (newX > l) {
newX = l;
}
if (newX !== cl) {
this.contents.setLeft(newX);
}
};
ScrollFrameMorph.prototype.scrollY = function (steps) {
var ct = this.contents.top(),
t = this.top(),
ch = this.contents.height(),
b = this.bottom(),
newY;
newY = ct + steps;
if (newY + ch < b) {
newY = b - ch;
}
if (newY > t) {
newY = t;
}
if (newY !== ct) {
this.contents.setTop(newY);
}
};
ScrollFrameMorph.prototype.step = function () {
nop();
};
ScrollFrameMorph.prototype.mouseDownLeft = function (pos) {
if (!this.isScrollingByDragging) {
return null;
}
var world = this.root(),
hand = world.hand,
oldPos = pos,
myself = this,
deltaX = 0,
deltaY = 0,
friction = 0.8;
this.step = function () {
var newPos;
if (hand.mouseButton &&
(hand.children.length === 0) &&
(myself.bounds.containsPoint(hand.bounds.origin))) {
if (hand.grabPosition &&
(hand.grabPosition.distanceTo(hand.position()) <=
MorphicPreferences.grabThreshold)) {
// still within the grab threshold
return null;
}
newPos = hand.bounds.origin;
deltaX = newPos.x - oldPos.x;
if (deltaX !== 0) {
myself.scrollX(deltaX);
}
deltaY = newPos.y - oldPos.y;
if (deltaY !== 0) {
myself.scrollY(deltaY);
}
oldPos = newPos;
} else {
if (!myself.hasVelocity) {
myself.step = function () {
nop();
};
} else {
if ((Math.abs(deltaX) < 0.5) &&
(Math.abs(deltaY) < 0.5)) {
myself.step = function () {
nop();
};
} else {
deltaX = deltaX * friction;
myself.scrollX(Math.round(deltaX));
deltaY = deltaY * friction;
myself.scrollY(Math.round(deltaY));
}
}
}
this.adjustScrollBars();
};
};
ScrollFrameMorph.prototype.startAutoScrolling = function () {
var myself = this,
inset = MorphicPreferences.scrollBarSize * 3,
world = this.world(),
hand,
inner,
pos;
if (!world) {
return null;
}
hand = world.hand;
if (!this.autoScrollTrigger) {
this.autoScrollTrigger = Date.now();
}
this.step = function () {
pos = hand.bounds.origin;
inner = myself.bounds.insetBy(inset);
if ((myself.bounds.containsPoint(pos)) &&
(!(inner.containsPoint(pos))) &&
(hand.children.length > 0)) {
myself.autoScroll(pos);
} else {
myself.step = function () {
nop();
};
myself.autoScrollTrigger = null;
}
};
};
ScrollFrameMorph.prototype.autoScroll = function (pos) {
var inset, area;
if (Date.now() - this.autoScrollTrigger < 500) {
return null;
}
inset = MorphicPreferences.scrollBarSize * 3;
area = this.topLeft().extent(new Point(this.width(), inset));
if (area.containsPoint(pos)) {
this.scrollY(inset - (pos.y - this.top()));
}
area = this.topLeft().extent(new Point(inset, this.height()));
if (area.containsPoint(pos)) {
this.scrollX(inset - (pos.x - this.left()));
}
area = (new Point(this.right() - inset, this.top()))
.extent(new Point(inset, this.height()));
if (area.containsPoint(pos)) {
this.scrollX(-(inset - (this.right() - pos.x)));
}
area = (new Point(this.left(), this.bottom() - inset))
.extent(new Point(this.width(), inset));
if (area.containsPoint(pos)) {
this.scrollY(-(inset - (this.bottom() - pos.y)));
}
this.adjustScrollBars();
};
// ScrollFrameMorph scrolling by editing text:
ScrollFrameMorph.prototype.scrollCursorIntoView = function (morph) {
var txt = morph.target,
offset = txt.position().subtract(this.contents.position()),
ft = this.top() + this.padding,
fb = this.bottom() - this.padding;
this.contents.setExtent(txt.extent().add(offset).add(this.padding));
if (morph.top() < ft) {
this.contents.setTop(this.contents.top() + ft - morph.top());
morph.setTop(ft);
} else if (morph.bottom() > fb) {
this.contents.setBottom(this.contents.bottom() + fb - morph.bottom());
morph.setBottom(fb);
}
this.adjustScrollBars();
};
// ScrollFrameMorph events:
ScrollFrameMorph.prototype.mouseScroll = function (y, x) {
if (y) {
this.scrollY(y * MorphicPreferences.mouseScrollAmount);
}
if (x) {
this.scrollX(x * MorphicPreferences.mouseScrollAmount);
}
this.adjustScrollBars();
};
// ScrollFrameMorph duplicating:
ScrollFrameMorph.prototype.updateReferences = function (map) {
var myself = this;
ScrollFrameMorph.uber.updateReferences.call(this, map);
if (this.hBar) {
this.hBar.action = function (num) {
myself.contents.setPosition(
new Point(myself.left() - num, myself.contents.position().y)
);
};
}
if (this.vBar) {
this.vBar.action = function (num) {
myself.contents.setPosition(
new Point(myself.contents.position().x, myself.top() - num)
);
};
}
};
// ScrollFrameMorph menu:
ScrollFrameMorph.prototype.developersMenu = function () {
var menu = ScrollFrameMorph.uber.developersMenu.call(this);
if (this.isTextLineWrapping) {
menu.addItem(
"auto line wrap off...",
'toggleTextLineWrapping',
'turn automatic\nline wrapping\noff'
);
} else {
menu.addItem(
"auto line wrap on...",
'toggleTextLineWrapping',
'enable automatic\nline wrapping'
);
}
return menu;
};
ScrollFrameMorph.prototype.toggleTextLineWrapping = function () {
this.isTextLineWrapping = !this.isTextLineWrapping;
};
// ListMorph ///////////////////////////////////////////////////////////
ListMorph.prototype = new ScrollFrameMorph();
ListMorph.prototype.constructor = ListMorph;
ListMorph.uber = ScrollFrameMorph.prototype;
function ListMorph(elements, labelGetter, format, doubleClickAction) {
/*
passing a format is optional. If the format parameter is specified
it has to be of the following pattern:
[
[, ],
['bold', ],
['italic', ],
...
]
multiple conditions can be passed in such a format list, the
last predicate to evaluate true when given the list element sets
the given format category (color, bold, italic).
If no condition is met, the default format (color black, non-bold,
non-italic) will be assigned.
An example of how to use fomats can be found in the InspectorMorph's
"markOwnProperties" mechanism.
*/
this.init(
elements || [],
labelGetter || function (element) {
if (isString(element)) {
return element;
}
if (element.toSource) {
return element.toSource();
}
return element.toString();
},
format || [],
doubleClickAction // optional callback
);
}
ListMorph.prototype.init = function (
elements,
labelGetter,
format,
doubleClickAction
) {
ListMorph.uber.init.call(this);
this.contents.acceptsDrops = false;
this.color = new Color(255, 255, 255);
this.hBar.alpha = 0.6;
this.vBar.alpha = 0.6;
this.elements = elements || [];
this.labelGetter = labelGetter;
this.format = format;
this.listContents = null;
this.selected = null; // actual element currently selected
this.active = null; // menu item representing the selected element
this.action = null;
this.doubleClickAction = doubleClickAction || null;
this.acceptsDrops = false;
this.buildListContents();
};
ListMorph.prototype.buildListContents = function () {
var myself = this;
if (this.listContents) {
this.listContents.destroy();
}
this.listContents = new MenuMorph(
this.select,
null,
this
);
if (this.elements.length === 0) {
this.elements = ['(empty)'];
}
this.elements.forEach(function (element) {
var color = null,
bold = false,
italic = false;
myself.format.forEach(function (pair) {
if (pair[1].call(null, element)) {
if (pair[0] === 'bold') {
bold = true;
} else if (pair[0] === 'italic') {
italic = true;
} else { // assume it's a color
color = pair[0];
}
}
});
myself.listContents.addItem(
myself.labelGetter(element), // label string
element, // action
null, // hint
color,
bold,
italic,
myself.doubleClickAction
);
});
this.listContents.setPosition(this.contents.position());
this.listContents.isListContents = true;
this.listContents.drawNew();
this.addContents(this.listContents);
};
ListMorph.prototype.select = function (item, trigger) {
if (isNil(item)) {return; }
this.selected = item;
this.active = trigger;
if (this.action) {
this.action.call(null, item);
}
};
ListMorph.prototype.setExtent = function (aPoint) {
var lb = this.listContents.bounds,
nb = this.bounds.origin.copy().corner(
this.bounds.origin.add(aPoint)
);
if (nb.right() > lb.right() && nb.width() <= lb.width()) {
this.listContents.setRight(nb.right());
}
if (nb.bottom() > lb.bottom() && nb.height() <= lb.height()) {
this.listContents.setBottom(nb.bottom());
}
ListMorph.uber.setExtent.call(this, aPoint);
};
ListMorph.prototype.activeIndex = function () {
return this.listContents.children.indexOf(this.active);
};
ListMorph.prototype.activateIndex = function (idx) {
var item = this.listContents.children[idx];
if (!item) {return; }
item.image = item.pressImage;
item.changed();
item.trigger();
};
// StringFieldMorph ////////////////////////////////////////////////////
// StringFieldMorph inherit from FrameMorph:
StringFieldMorph.prototype = new FrameMorph();
StringFieldMorph.prototype.constructor = StringFieldMorph;
StringFieldMorph.uber = FrameMorph.prototype;
function StringFieldMorph(
defaultContents,
minWidth,
fontSize,
fontStyle,
bold,
italic,
isNumeric
) {
this.init(
defaultContents || '',
minWidth || 100,
fontSize || 12,
fontStyle || 'sans-serif',
bold || false,
italic || false,
isNumeric
);
}
StringFieldMorph.prototype.init = function (
defaultContents,
minWidth,
fontSize,
fontStyle,
bold,
italic,
isNumeric
) {
this.defaultContents = defaultContents;
this.minWidth = minWidth;
this.fontSize = fontSize;
this.fontStyle = fontStyle;
this.isBold = bold;
this.isItalic = italic;
this.isNumeric = isNumeric || false;
this.text = null;
StringFieldMorph.uber.init.call(this);
this.color = new Color(255, 255, 255);
this.isEditable = true;
this.acceptsDrops = false;
this.drawNew();
};
StringFieldMorph.prototype.drawNew = function () {
var txt;
txt = this.text ? this.string() : this.defaultContents;
this.text = null;
this.children.forEach(function (child) {
child.destroy();
});
this.children = [];
this.text = new StringMorph(
txt,
this.fontSize,
this.fontStyle,
this.isBold,
this.isItalic,
this.isNumeric
);
this.text.isNumeric = this.isNumeric; // for whichever reason...
this.text.setPosition(this.bounds.origin.copy());
this.text.isEditable = this.isEditable;
this.text.isDraggable = false;
this.text.enableSelecting();
this.silentSetExtent(
new Point(
Math.max(this.width(), this.minWidth),
this.text.height()
)
);
StringFieldMorph.uber.drawNew.call(this);
this.add(this.text);
};
StringFieldMorph.prototype.string = function () {
return this.text.text;
};
StringFieldMorph.prototype.mouseClickLeft = function (pos) {
if (this.isEditable) {
this.text.edit();
} else {
this.escalateEvent('mouseClickLeft', pos);
}
};
// BouncerMorph ////////////////////////////////////////////////////////
// I am a Demo of a stepping custom Morph
var BouncerMorph;
// Bouncers inherit from Morph:
BouncerMorph.prototype = new Morph();
BouncerMorph.prototype.constructor = BouncerMorph;
BouncerMorph.uber = Morph.prototype;
// BouncerMorph instance creation:
function BouncerMorph() {
this.init();
}
// BouncerMorph initialization:
BouncerMorph.prototype.init = function (type, speed) {
BouncerMorph.uber.init.call(this);
this.fps = 50;
// additional properties:
this.isStopped = false;
this.type = type || 'vertical';
if (this.type === 'vertical') {
this.direction = 'down';
} else {
this.direction = 'right';
}
this.speed = speed || 1;
};
// BouncerMorph moving:
BouncerMorph.prototype.moveUp = function () {
this.moveBy(new Point(0, -this.speed));
};
BouncerMorph.prototype.moveDown = function () {
this.moveBy(new Point(0, this.speed));
};
BouncerMorph.prototype.moveRight = function () {
this.moveBy(new Point(this.speed, 0));
};
BouncerMorph.prototype.moveLeft = function () {
this.moveBy(new Point(-this.speed, 0));
};
// BouncerMorph stepping:
BouncerMorph.prototype.step = function () {
if (!this.isStopped) {
if (this.type === 'vertical') {
if (this.direction === 'down') {
this.moveDown();
} else {
this.moveUp();
}
if (this.fullBounds().top() < this.parent.top() &&
this.direction === 'up') {
this.direction = 'down';
}
if (this.fullBounds().bottom() > this.parent.bottom() &&
this.direction === 'down') {
this.direction = 'up';
}
} else if (this.type === 'horizontal') {
if (this.direction === 'right') {
this.moveRight();
} else {
this.moveLeft();
}
if (this.fullBounds().left() < this.parent.left() &&
this.direction === 'left') {
this.direction = 'right';
}
if (this.fullBounds().right() > this.parent.right() &&
this.direction === 'right') {
this.direction = 'left';
}
}
}
};
// HandMorph ///////////////////////////////////////////////////////////
// I represent the Mouse cursor
// HandMorph inherits from Morph:
HandMorph.prototype = new Morph();
HandMorph.prototype.constructor = HandMorph;
HandMorph.uber = Morph.prototype;
// HandMorph instance creation:
function HandMorph(aWorld) {
this.init(aWorld);
}
// HandMorph initialization:
HandMorph.prototype.init = function (aWorld) {
HandMorph.uber.init.call(this, true);
this.bounds = new Rectangle();
// additional properties:
this.world = aWorld;
this.mouseButton = null;
this.mouseOverList = [];
this.morphToGrab = null;
this.grabPosition = null;
this.grabOrigin = null;
this.temporaries = [];
this.touchHoldTimeout = null;
this.contextMenuEnabled = false;
};
HandMorph.prototype.changed = function () {
var b;
if (this.world !== null) {
b = this.fullBounds();
if (!b.extent().eq(new Point())) {
this.world.broken.push(b.spread());
}
}
};
HandMorph.prototype.fullChanged = HandMorph.prototype.changed;
// HandMorph navigation:
HandMorph.prototype.morphAtPointer = function () {
return this.world.topMorphAt(this.bounds.origin) || this.world;
};
HandMorph.prototype.allMorphsAtPointer = function () {
var morphs = this.world.allChildren(),
myself = this;
return morphs.filter(function (m) {
return m.isVisible &&
m.visibleBounds().containsPoint(myself.bounds.origin);
});
};
// HandMorph dragging and dropping:
/*
drag 'n' drop events, method(arg) -> receiver:
prepareToBeGrabbed(handMorph) -> grabTarget
reactToGrabOf(grabbedMorph) -> oldParent
wantsDropOf(morphToDrop) -> newParent
justDropped(handMorph) -> droppedMorph
reactToDropOf(droppedMorph, handMorph) -> newParent
*/
HandMorph.prototype.dropTargetFor = function (aMorph) {
var target = this.morphAtPointer();
while (!target.wantsDropOf(aMorph)) {
target = target.parent;
}
return target;
};
HandMorph.prototype.grab = function (aMorph) {
var oldParent = aMorph.parent;
if (aMorph instanceof WorldMorph) {
return null;
}
if (this.children.length === 0) {
this.world.stopEditing();
this.grabOrigin = aMorph.situation();
aMorph.addShadow();
if (aMorph.prepareToBeGrabbed) {
aMorph.prepareToBeGrabbed(this);
}
aMorph.cachedFullImage = aMorph.fullImageClassic();
aMorph.cachedFullBounds = aMorph.fullBounds();
this.add(aMorph);
this.changed();
if (oldParent && oldParent.reactToGrabOf) {
oldParent.reactToGrabOf(aMorph);
}
}
};
HandMorph.prototype.drop = function () {
var target, morphToDrop;
if (this.children.length !== 0) {
morphToDrop = this.children[0];
target = this.dropTargetFor(morphToDrop);
this.changed();
target.add(morphToDrop);
morphToDrop.cachedFullImage = null;
morphToDrop.cachedFullBounds = null;
morphToDrop.changed();
morphToDrop.removeShadow();
this.children = [];
this.setExtent(new Point());
if (morphToDrop.justDropped) {
morphToDrop.justDropped(this);
}
if (target.reactToDropOf) {
target.reactToDropOf(morphToDrop, this);
}
}
};
// HandMorph event dispatching:
/*
mouse events:
mouseDownLeft
mouseDownRight
mouseClickLeft
mouseClickRight
mouseDoubleClick
mouseEnter
mouseLeave
mouseEnterDragging
mouseLeaveDragging
mouseMove
mouseScroll
*/
HandMorph.prototype.processMouseDown = function (event) {
var morph, actualClick;
this.destroyTemporaries();
this.contextMenuEnabled = true;
this.morphToGrab = null;
this.grabPosition = null;
if (this.children.length !== 0) {
this.drop();
this.mouseButton = null;
} else {
morph = this.morphAtPointer();
if (this.world.activeMenu) {
if (!contains(
morph.allParents(),
this.world.activeMenu
)) {
this.world.activeMenu.destroy();
} else {
clearInterval(this.touchHoldTimeout);
}
}
if (this.world.activeHandle) {
if (morph !== this.world.activeHandle) {
this.world.activeHandle.destroy();
}
}
if (this.world.cursor) {
if (morph !== this.world.cursor.target) {
this.world.stopEditing();
}
}
if (!morph.mouseMove) {
this.morphToGrab = morph.rootForGrab();
this.grabPosition = this.bounds.origin.copy();
}
if (event.button === 2 || event.ctrlKey) {
this.mouseButton = 'right';
actualClick = 'mouseDownRight';
} else {
this.mouseButton = 'left';
actualClick = 'mouseDownLeft';
}
while (!morph[actualClick]) {
morph = morph.parent;
}
morph[actualClick](this.bounds.origin);
}
};
HandMorph.prototype.processTouchStart = function (event) {
var myself = this;
MorphicPreferences.isTouchDevice = true;
clearInterval(this.touchHoldTimeout);
if (event.touches.length === 1) {
this.touchHoldTimeout = setInterval( // simulate mouseRightClick
function () {
myself.processMouseDown({button: 2});
myself.processMouseUp({button: 2});
event.preventDefault();
clearInterval(myself.touchHoldTimeout);
},
400
);
this.processMouseMove(event.touches[0]); // update my position
this.processMouseDown({button: 0});
event.preventDefault();
}
};
HandMorph.prototype.processTouchMove = function (event) {
MorphicPreferences.isTouchDevice = true;
if (event.touches.length === 1) {
var touch = event.touches[0];
this.processMouseMove(touch);
clearInterval(this.touchHoldTimeout);
}
};
HandMorph.prototype.processTouchEnd = function (event) {
MorphicPreferences.isTouchDevice = true;
clearInterval(this.touchHoldTimeout);
nop(event);
this.processMouseUp({button: 0});
};
HandMorph.prototype.processMouseUp = function () {
var morph = this.morphAtPointer(),
context,
contextMenu,
expectedClick;
this.destroyTemporaries();
if (this.children.length !== 0) {
this.drop();
} else {
if (this.mouseButton === 'left') {
expectedClick = 'mouseClickLeft';
} else {
expectedClick = 'mouseClickRight';
if (this.mouseButton && this.contextMenuEnabled) {
context = morph;
contextMenu = context.contextMenu();
while ((!contextMenu) &&
context.parent) {
context = context.parent;
contextMenu = context.contextMenu();
}
if (contextMenu) {
contextMenu.popUpAtHand(this.world);
}
}
}
while (!morph[expectedClick]) {
morph = morph.parent;
}
morph[expectedClick](this.bounds.origin);
}
this.mouseButton = null;
};
HandMorph.prototype.processDoubleClick = function () {
var morph = this.morphAtPointer();
this.destroyTemporaries();
if (this.children.length !== 0) {
this.drop();
} else {
while (morph && !morph.mouseDoubleClick) {
morph = morph.parent;
}
if (morph) {
morph.mouseDoubleClick(this.bounds.origin);
}
}
this.mouseButton = null;
};
HandMorph.prototype.processMouseMove = function (event) {
var pos,
posInDocument = getDocumentPositionOf(this.world.worldCanvas),
mouseOverNew,
myself = this,
morph,
topMorph;
pos = new Point(
event.pageX - posInDocument.x,
event.pageY - posInDocument.y
);
this.setPosition(pos);
// determine the new mouse-over-list:
// mouseOverNew = this.allMorphsAtPointer();
mouseOverNew = this.morphAtPointer().allParents();
if (!this.children.length && this.mouseButton) {
topMorph = this.morphAtPointer();
morph = topMorph.rootForGrab();
if (topMorph.mouseMove) {
topMorph.mouseMove(pos, this.mouseButton);
if (this.mouseButton === 'right') {
this.contextMenuEnabled = false;
}
}
// if a morph is marked for grabbing, just grab it
if (this.mouseButton === 'left' &&
this.morphToGrab &&
(this.grabPosition.distanceTo(this.bounds.origin) >
MorphicPreferences.grabThreshold)) {
this.setPosition(this.grabPosition);
if (this.morphToGrab.isDraggable) {
morph = this.morphToGrab;
this.grab(morph);
} else if (this.morphToGrab.isTemplate) {
morph = this.morphToGrab.fullCopy();
morph.isTemplate = false;
morph.isDraggable = true;
if (morph.reactToTemplateCopy) {
morph.reactToTemplateCopy();
}
this.grab(morph);
this.grabOrigin = this.morphToGrab.situation();
}
this.setPosition(pos);
}
}
this.mouseOverList.forEach(function (old) {
if (!contains(mouseOverNew, old)) {
if (old.mouseLeave) {
old.mouseLeave();
}
if (old.mouseLeaveDragging && myself.mouseButton) {
old.mouseLeaveDragging();
}
}
});
mouseOverNew.forEach(function (newMorph) {
if (!contains(myself.mouseOverList, newMorph)) {
if (newMorph.mouseEnter) {
newMorph.mouseEnter();
}
if (newMorph.mouseEnterDragging && myself.mouseButton) {
newMorph.mouseEnterDragging();
}
}
// autoScrolling support:
if (myself.children.length > 0) {
if (newMorph instanceof ScrollFrameMorph &&
newMorph.enableAutoScrolling &&
newMorph.contents.allChildren().some(function (any) {
return any.wantsDropOf(myself.children[0]);
})
) {
if (!newMorph.bounds.insetBy(
MorphicPreferences.scrollBarSize * 3
).containsPoint(myself.bounds.origin)) {
newMorph.startAutoScrolling();
}
}
}
});
this.mouseOverList = mouseOverNew;
};
HandMorph.prototype.processMouseScroll = function (event) {
var morph = this.morphAtPointer();
while (morph && !morph.mouseScroll) {
morph = morph.parent;
}
if (morph) {
morph.mouseScroll(
(event.detail / -3) || (
Object.prototype.hasOwnProperty.call(
event,
'wheelDeltaY'
) ?
event.wheelDeltaY / 120 :
event.wheelDelta / 120
),
event.wheelDeltaX / 120 || 0
);
}
};
/*
drop event:
droppedImage
droppedSVG
droppedAudio
droppedText
*/
HandMorph.prototype.processDrop = function (event) {
/*
find out whether an external image or audio file was dropped
onto the world canvas, turn it into an offscreen canvas or audio
element and dispatch the
droppedImage(canvas, name)
droppedSVG(image, name)
droppedAudio(audio, name)
events to interested Morphs at the mouse pointer
*/
var files = event instanceof FileList ? event
: event.target.files || event.dataTransfer.files,
file,
url = event.dataTransfer ?
event.dataTransfer.getData('URL') : null,
txt = event.dataTransfer ?
event.dataTransfer.getData('Text/HTML') : null,
src,
target = this.morphAtPointer(),
img = new Image(),
canvas,
i;
function readSVG(aFile) {
var pic = new Image(),
frd = new FileReader();
while (!target.droppedSVG) {
target = target.parent;
}
pic.onload = function () {
target.droppedSVG(pic, aFile.name);
};
frd = new FileReader();
frd.onloadend = function (e) {
pic.src = e.target.result;
};
frd.readAsDataURL(aFile);
}
function readImage(aFile) {
var pic = new Image(),
frd = new FileReader();
while (!target.droppedImage) {
target = target.parent;
}
pic.onload = function () {
canvas = newCanvas(new Point(pic.width, pic.height), true);
canvas.getContext('2d').drawImage(pic, 0, 0);
target.droppedImage(canvas, aFile.name);
};
frd = new FileReader();
frd.onloadend = function (e) {
pic.src = e.target.result;
};
frd.readAsDataURL(aFile);
}
function readAudio(aFile) {
var snd = new Audio(),
frd = new FileReader();
while (!target.droppedAudio) {
target = target.parent;
}
frd.onloadend = function (e) {
snd.src = e.target.result;
target.droppedAudio(snd, aFile.name);
};
frd.readAsDataURL(aFile);
}
function readText(aFile) {
var frd = new FileReader();
while (!target.droppedText) {
target = target.parent;
}
frd.onloadend = function (e) {
target.droppedText(e.target.result, aFile.name);
};
frd.readAsText(aFile);
}
function readBinary(aFile) {
var frd = new FileReader();
while (!target.droppedBinary) {
target = target.parent;
}
frd.onloadend = function (e) {
target.droppedBinary(e.target.result, aFile.name);
};
frd.readAsArrayBuffer(aFile);
}
function parseImgURL(html) {
var iurl = '',
idx,
c,
start = html.indexOf(';
if (start === -1) {return null; }
start += 10;
for (idx = start; idx < html.length; idx += 1) {
c = html[idx];
if (c === ')
0) {
for (i = 0; i < files.length; i += 1) {
file = files[i];
if (file.type.indexOf("svg") !== -1
&& !MorphicPreferences.rasterizeSVGs) {
readSVG(file);
} else if (file.type.indexOf("image") === 0) {
readImage(file);
} else if (file.type.indexOf("audio") === 0) {
readAudio(file);
} else if (file.type.indexOf("text") === 0) {
readText(file);
} else { // assume it's meant to be binary
readBinary(file);
}
}
} else if (url) {
if (
contains(
['gif', 'png', 'jpg', 'jpeg', 'bmp'],
url.slice(url.lastIndexOf('.') + 1).toLowerCase()
)
) {
while (!target.droppedImage) {
target = target.parent;
}
img = new Image();
img.onload = function () {
canvas = newCanvas(new Point(img.width, img.height), true);
canvas.getContext('2d').drawImage(img, 0, 0);
target.droppedImage(canvas);
};
img.src = url;
}
} else if (txt) {
while (!target.droppedImage) {
target = target.parent;
}
img = new Image();
img.onload = function () {
canvas = newCanvas(new Point(img.width, img.height), true);
canvas.getContext('2d').drawImage(img, 0, 0);
target.droppedImage(canvas);
};
src = parseImgURL(txt);
if (src) {img.src = src; }
}
};
// HandMorph tools
HandMorph.prototype.destroyTemporaries = function () {
/*
temporaries are just an array of morphs which will be deleted upon
the next mouse click, or whenever another temporary Morph decides
that it needs to remove them. The primary purpose of temporaries is
to display tools tips of speech bubble help.
*/
var myself = this;
this.temporaries.forEach(function (morph) {
if (!(morph.isClickable
&& morph.bounds.containsPoint(myself.position()))) {
morph.destroy();
myself.temporaries.splice(myself.temporaries.indexOf(morph), 1);
}
});
};
// WorldMorph //////////////////////////////////////////////////////////
// I represent the