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sane-project-frontends/libgtk/gtk3ruler.c

1501 wiersze
44 KiB
C
Czysty Bezpośredni odnośnik Wina Historia

// SPDX-License-Identifier: GPL-3.0-or-later
/*
* Customized ruler class for inkscape. Note that this is a fork of
* the GimpRuler widget from GIMP: libgimpwidgets/gimpruler.c.
* The GIMP code was released under the LGPL3+ (which is GPL3 plus extra permissions that may be ignored).
* The GIMP code itself is a fork of the now-obsolete GtkRuler widget from GTK+ 2.
*
* Major differences between implementations in Inkscape and GIMP are
* as follows:
* - We use a 1,2,4,8... scale for inches and 1,2,5,10... for everything
* else. GIMP uses 1,2,5,10... for everything.
*
* - We use a default font size of PANGO_SCALE_X_SMALL for labels,
* GIMP uses PANGO_SCALE_SMALL (i.e., a bit larger than ours).
*
* - We abbreviate large numbers in tick-labels (e.g., 10000 -> 10k)
*
* - GtkStateFlags are read from GtkStyleContext objects where appropriate
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Frank Felfe <innerspace@iname.com>
* bulia byak <buliabyak@users.sf.net>
* Diederik van Lierop <mail@diedenrezi.nl>
* Jon A. Cruz <jon@joncruz.org>
* Alex Valavanis <valavanisalex@gmail.com>
*
* Copyright (C) 1999-2011 authors
*
* Released under GNU GPL v3+. Read the file 'COPYING' for more information.
*/
#include <string.h>
#include <math.h>
#include <stdio.h>
#include "gtk3ruler.h"
#define ROUND(x) ((int) round(x))
#define GTK_PARAM_READWRITE G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
#define DEFAULT_RULER_FONT_SCALE PANGO_SCALE_X_SMALL
#define MINIMUM_INCR 5
#define IMMEDIATE_REDRAW_THRESHOLD 20
enum {
PROP_0,
PROP_ORIENTATION,
PROP_UNIT,
PROP_LOWER,
PROP_UPPER,
PROP_POSITION,
PROP_MAX_SIZE
};
typedef struct _Gtk3RulerMetric Gtk3RulerMetric;
/* All distances below are in 1/72nd's of an inch. (According to
* Adobe, that's a point, but points are really 1/72.27 in.)
*/
struct _Gtk3RulerPrivate
{
GtkOrientation orientation;
Gtk3RulerMetricUnit unit;
gdouble lower;
gdouble upper;
gdouble position;
gdouble max_size;
GdkWindow *input_window;
cairo_surface_t *backing_store;
gboolean backing_store_valid;
GdkRectangle last_pos_rect;
guint pos_redraw_idle_id;
PangoLayout *layout;
gdouble font_scale;
GList *track_widgets;
};
#define GTK3_RULER_GET_PRIVATE(ruler) \
GTK3_RULER (ruler)->priv
struct _Gtk3RulerMetric
{
gdouble ruler_scale[16];
gint subdivide[5];
};
Gtk3RulerMetric ruler_metric;
// Ruler metric for general use.
static const Gtk3RulerMetric ruler_metric_general = {
{ 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
{ 1, 5, 10, 50, 100 }
};
// Ruler metric for inch scales.
static const Gtk3RulerMetric ruler_metric_inches = {
{ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 },
{ 1, 2, 4, 8, 16 }
};
#if 0
static const Gtk3RulerMetric ruler_metric_feet =
{
/* 3 feet = 1 yard; 6 feet = 1 fathom */
{ 1, 3, 6, 12, 36, 72, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
/* 1 foot = 12 inches, so let's divide up to 12, */
{ 1, 3, 6, 12,
/* then divide the inch by 2. */
24 }
};
static const Gtk3RulerMetric ruler_metric_yards =
{
/* 1 fathom = 2 yards. Should we go back to base-10 digits? */
{ 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
/* 1 yard = 3 feet = 36 inches. */
{ 1, 3, 6, 12, 36 }
};
#endif
static void gtk3_ruler_dispose (GObject *object);
static void gtk3_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk3_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk3_ruler_realize (GtkWidget *widget);
static void gtk3_ruler_unrealize (GtkWidget *widget);
static void gtk3_ruler_map (GtkWidget *widget);
static void gtk3_ruler_unmap (GtkWidget *widget);
static void gtk3_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk3_ruler_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
static void gtk3_ruler_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
static void gtk3_ruler_style_updated (GtkWidget *widget);
static gboolean gtk3_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk3_ruler_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk3_ruler_draw_ticks (Gtk3Ruler *ruler);
static GdkRectangle gtk3_ruler_get_pos_rect (Gtk3Ruler *ruler,
gdouble position);
static gboolean gtk3_ruler_idle_queue_pos_redraw(gpointer data);
static void gtk3_ruler_queue_pos_redraw (Gtk3Ruler *ruler);
static void gtk3_ruler_draw_pos (Gtk3Ruler *ruler,
cairo_t *cr);
static void gtk3_ruler_make_pixmap (Gtk3Ruler *ruler);
static PangoLayout * gtk3_ruler_get_layout (GtkWidget *widget,
const gchar *text);
G_DEFINE_TYPE_WITH_PRIVATE (Gtk3Ruler, gtk3_ruler, GTK_TYPE_WIDGET)
#define parent_class gtk3_ruler_parent_class
static void
gtk3_ruler_class_init (Gtk3RulerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
gtk_widget_class_set_css_name (widget_class, "ruler-widget");
object_class->dispose = gtk3_ruler_dispose;
object_class->set_property = gtk3_ruler_set_property;
object_class->get_property = gtk3_ruler_get_property;
widget_class->realize = gtk3_ruler_realize;
widget_class->unrealize = gtk3_ruler_unrealize;
widget_class->map = gtk3_ruler_map;
widget_class->unmap = gtk3_ruler_unmap;
widget_class->size_allocate = gtk3_ruler_size_allocate;
widget_class->get_preferred_width = gtk3_ruler_get_preferred_width;
widget_class->get_preferred_height = gtk3_ruler_get_preferred_height;
widget_class->style_updated = gtk3_ruler_style_updated;
widget_class->draw = gtk3_ruler_draw;
widget_class->motion_notify_event = gtk3_ruler_motion_notify;
g_object_class_install_property (object_class,
PROP_ORIENTATION,
g_param_spec_enum ("orientation",
("Orientation"),
("The orientation of the ruler"),
GTK_TYPE_ORIENTATION,
GTK_ORIENTATION_HORIZONTAL,
GTK_PARAM_READWRITE));
/* FIXME: Should probably use g_param_spec_enum */
g_object_class_install_property (object_class,
PROP_UNIT,
g_param_spec_string ("unit",
("Unit"),
("Unit of the ruler"),
"px",
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_LOWER,
g_param_spec_double ("lower",
("Lower"),
("Lower limit of ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_UPPER,
g_param_spec_double ("upper",
("Upper"),
("Upper limit of ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_POSITION,
g_param_spec_double ("position",
("Position"),
("Position of mark on the ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_MAX_SIZE,
g_param_spec_double ("max-size",
("Max Size"),
("Maximum size of the ruler"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0.0,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_double ("font-scale",
NULL, NULL,
0.0,
G_MAXDOUBLE,
DEFAULT_RULER_FONT_SCALE,
G_PARAM_READABLE));
}
static void
gtk3_ruler_init (Gtk3Ruler *ruler)
{
Gtk3RulerPrivate *priv = gtk3_ruler_get_instance_private (ruler);
ruler->priv = priv;
gtk_widget_set_has_window (GTK_WIDGET (ruler), FALSE);
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->unit = GTK3_RULER_METRIC_INCHES;
priv->lower = 0;
priv->upper = 0;
priv->position = 0;
priv->max_size = 0;
priv->backing_store = NULL;
priv->backing_store_valid = FALSE;
priv->last_pos_rect.x = 0;
priv->last_pos_rect.y = 0;
priv->last_pos_rect.width = 0;
priv->last_pos_rect.height = 0;
priv->pos_redraw_idle_id = 0;
priv->font_scale = DEFAULT_RULER_FONT_SCALE;
priv->track_widgets = NULL;
}
static void
gtk3_ruler_dispose (GObject *object)
{
Gtk3Ruler *ruler = GTK3_RULER(object);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE(ruler);
if (ruler == NULL || priv == NULL || priv->track_widgets == NULL || g_list_length (priv->track_widgets) == 0) { return; }
while (priv->track_widgets != NULL) {
GtkWidget *widget = priv->track_widgets->data;
if (!GTK_IS_WIDGET (widget))break;
priv->track_widgets = g_list_remove (priv->track_widgets, widget);
gtk3_ruler_remove_track_widget(ruler, widget);
}
if (priv->pos_redraw_idle_id) {
g_source_remove(priv->pos_redraw_idle_id);
priv->pos_redraw_idle_id = 0;
}
priv->track_widgets = NULL;
G_OBJECT_CLASS (parent_class)->dispose(object);
}
/**
* gtk3_ruler_set_range:
* @ruler: the Gtk3Ruler
* @lower: the lower limit of the ruler
* @upper: the upper limit of the ruler
* @max_size: the maximum size of the ruler used when calculating the space to
* leave for the text
*
* This sets the range of the ruler.
*/
void
gtk3_ruler_set_range (Gtk3Ruler *ruler,
gdouble lower,
gdouble upper,
gdouble max_size)
{
Gtk3RulerPrivate *priv;
g_return_if_fail (GTK3_IS_RULER (ruler));
priv = GTK3_RULER_GET_PRIVATE (ruler);
g_object_freeze_notify (G_OBJECT (ruler));
if (priv->lower != lower)
{
priv->lower = lower;
g_object_notify (G_OBJECT (ruler), "lower");
}
if (priv->upper != upper)
{
priv->upper = upper;
g_object_notify (G_OBJECT (ruler), "upper");
}
if (priv->max_size != max_size)
{
priv->max_size = max_size;
g_object_notify (G_OBJECT (ruler), "max-size");
}
g_object_thaw_notify (G_OBJECT (ruler));
priv->backing_store_valid = FALSE;
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
/**
* gtk3_ruler_get_range:
* @ruler: a #Gtk3Ruler
* @lower: (allow-none): location to store lower limit of the ruler, or %NULL
* @upper: (allow-none): location to store upper limit of the ruler, or %NULL
* @max_size: location to store the maximum size of the ruler used when calculating
* the space to leave for the text, or %NULL.
*
* Retrieves values indicating the range and current position of a #Gtk3Ruler.
* See gtk3_ruler_set_range().
**/
void
gtk3_ruler_get_range (Gtk3Ruler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *max_size)
{
Gtk3RulerPrivate *priv;
g_return_if_fail (GTK3_IS_RULER (ruler));
priv = GTK3_RULER_GET_PRIVATE (ruler);
if (lower)
*lower = priv->lower;
if (upper)
*upper = priv->upper;
if (max_size)
*max_size = priv->max_size;
}
static void
gtk3_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
Gtk3Ruler *ruler = GTK3_RULER (object);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
priv->orientation = (GtkOrientation)g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (ruler));
break;
case PROP_UNIT:
gtk3_ruler_set_unit (ruler, (Gtk3RulerMetricUnit)g_value_get_int (value));
break;
case PROP_LOWER:
gtk3_ruler_set_range (ruler,
g_value_get_double (value),
priv->upper,
priv->max_size);
break;
case PROP_UPPER:
gtk3_ruler_set_range (ruler,
priv->lower,
g_value_get_int (value),
priv->max_size);
break;
case PROP_POSITION:
gtk3_ruler_set_position (ruler, g_value_get_double (value));
break;
case PROP_MAX_SIZE:
gtk3_ruler_set_range (ruler,
priv->lower,
priv->upper,
g_value_get_double (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk3_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
Gtk3Ruler *ruler = GTK3_RULER (object);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_UNIT:
g_value_set_int (value, priv->unit);
break;
case PROP_LOWER:
g_value_set_double (value, priv->lower);
break;
case PROP_UPPER:
g_value_set_double (value, priv->upper);
break;
case PROP_POSITION:
g_value_set_double (value, priv->position);
break;
case PROP_MAX_SIZE:
g_value_set_double (value, priv->max_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk3_ruler_realize (GtkWidget *widget)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
GdkWindowAttr attributes;
gint attributes_mask;
GTK_WIDGET_CLASS (gtk3_ruler_parent_class)->realize (widget);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_ONLY;
attributes.event_mask = (gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y;
priv->input_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (priv->input_window, ruler);
gtk3_ruler_make_pixmap (ruler);
}
static void
gtk3_ruler_unrealize(GtkWidget *widget)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->backing_store)
{
cairo_surface_destroy (priv->backing_store);
priv->backing_store = NULL;
}
priv->backing_store_valid = FALSE;
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
if (priv->input_window)
{
gdk_window_destroy (priv->input_window);
priv->input_window = NULL;
}
GTK_WIDGET_CLASS (gtk3_ruler_parent_class)->unrealize (widget);
}
static void
gtk3_ruler_map (GtkWidget *widget)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GTK_WIDGET_CLASS (gtk3_ruler_parent_class)->map (widget);
if (priv->input_window)
gdk_window_show (priv->input_window);
}
static void
gtk3_ruler_unmap (GtkWidget *widget)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->input_window)
gdk_window_hide (priv->input_window);
GTK_WIDGET_CLASS (gtk3_ruler_parent_class)->unmap (widget);
}
static void
gtk3_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
Gtk3Ruler *ruler = GTK3_RULER(widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation widget_allocation;
gboolean resized;
gtk_widget_get_allocation (widget, &widget_allocation);
resized = (widget_allocation.width != allocation->width ||
widget_allocation.height != allocation->height);
GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
if (gtk_widget_get_realized (widget))
{
gdk_window_move_resize (priv->input_window,
allocation->x, allocation->y,
allocation->width, allocation->height);
if (resized)
gtk3_ruler_make_pixmap (ruler);
}
}
static void
gtk3_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
PangoLayout *layout;
PangoRectangle ink_rect;
gint size;
layout = gtk3_ruler_get_layout (widget, "0123456789");
pango_layout_get_pixel_extents (layout, &ink_rect, NULL);
size = 2 + ink_rect.height * 1.7;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
GtkStateFlags state_flags = gtk_style_context_get_state (context);
gtk_style_context_get_border (context, state_flags, &border);
requisition->width = border.left + border.right;
requisition->height = border.top + border.bottom;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
requisition->width += 1;
requisition->height += size;
}
else
{
requisition->width += size;
requisition->height += 1;
}
}
static void
gtk3_ruler_style_updated (GtkWidget *widget)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GTK_WIDGET_CLASS (gtk3_ruler_parent_class)->style_updated (widget);
gtk_widget_style_get (widget,
"font-scale", &priv->font_scale,
NULL);
if (priv->layout)
{
g_object_unref (priv->layout);
priv->layout = NULL;
}
}
static void
gtk3_ruler_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
GtkRequisition requisition;
gtk3_ruler_size_request (widget, &requisition);
*minimum_width = *natural_width = requisition.width;
}
static void
gtk3_ruler_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
GtkRequisition requisition;
gtk3_ruler_size_request(widget, &requisition);
*minimum_height = *natural_height = requisition.height;
}
static gboolean
gtk3_ruler_draw (GtkWidget *widget,
cairo_t *cr)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
gtk_render_background (context, cr, 0, 0, allocation.width, allocation.height);
gtk_render_frame (context, cr, 0, 0, allocation.width, allocation.height);
gtk3_ruler_draw_ticks (ruler);
cairo_set_source_surface(cr, priv->backing_store, 0, 0);
cairo_paint(cr);
gtk3_ruler_draw_pos (ruler, cr);
return FALSE;
}
static void
gtk3_ruler_make_pixmap (Gtk3Ruler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
if (priv->backing_store)
cairo_surface_destroy (priv->backing_store);
priv->backing_store =
gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR_ALPHA,
allocation.width,
allocation.height);
priv->backing_store_valid = FALSE;
}
static void
gtk3_ruler_draw_pos (Gtk3Ruler *ruler,
cairo_t *cr)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GdkRGBA color;
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GdkRectangle pos_rect;
if (! gtk_widget_is_drawable (widget))
return;
pos_rect = gtk3_ruler_get_pos_rect (ruler, gtk3_ruler_get_position (ruler));
if ((pos_rect.width > 0) && (pos_rect.height > 0))
{
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_move_to (cr, pos_rect.x, pos_rect.y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_line_to (cr, pos_rect.x + pos_rect.width / 2.0,
pos_rect.y + pos_rect.height);
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y);
}
else
{
cairo_line_to (cr, pos_rect.x + pos_rect.width,
pos_rect.y + pos_rect.height / 2.0);
cairo_line_to (cr, pos_rect.x,
pos_rect.y + pos_rect.height);
}
cairo_fill (cr);
}
if (priv->last_pos_rect.width != 0 &&
priv->last_pos_rect.height != 0)
{
gdk_rectangle_union (&priv->last_pos_rect,
&pos_rect,
&priv->last_pos_rect);
}
else
{
priv->last_pos_rect = pos_rect;
}
}
/**
* gtk3_ruler_new:
* @orientation: the ruler's orientation
*
* Creates a new ruler.
*
* Return value: a new #Gtk3Ruler widget.
*/
GtkWidget *
gtk3_ruler_new (GtkOrientation orientation)
{
return GTK_WIDGET (g_object_new (GTK3_TYPE_RULER,
"orientation", orientation,
NULL));
}
static void
gtk3_ruler_update_position (Gtk3Ruler *ruler,
gdouble x,
gdouble y)
{
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gdouble lower;
gdouble upper;
gtk_widget_get_allocation (GTK_WIDGET (ruler), &allocation);
gtk3_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk3_ruler_set_position (ruler,
lower +
(upper - lower) * x / allocation.width);
}
else
{
gtk3_ruler_set_position (ruler,
lower +
(upper - lower) * y / allocation.height);
}
}
/* Returns TRUE if a translation should be done */
static gboolean
gtk_widget_get_translation_to_window (GtkWidget *widget,
GdkWindow *window,
int *x,
int *y)
{
GdkWindow *w, *widget_window;
if (! gtk_widget_get_has_window (widget))
{
GtkAllocation allocation;
gtk_widget_get_allocation (widget, &allocation);
*x = -allocation.x;
*y = -allocation.y;
}
else
{
*x = 0;
*y = 0;
}
widget_window = gtk_widget_get_window (widget);
for (w = window;
w && w != widget_window;
w = gdk_window_get_effective_parent (w))
{
gdouble px, py;
gdk_window_coords_to_parent (w, *x, *y, &px, &py);
*x += px;
*y += px;
}
if (w == NULL)
{
*x = 0;
*y = 0;
return FALSE;
}
return TRUE;
}
static void
gtk3_ruler_event_to_widget_coords (GtkWidget *widget,
GdkWindow *window,
gdouble event_x,
gdouble event_y,
gint *widget_x,
gint *widget_y)
{
gint tx, ty;
if (gtk_widget_get_translation_to_window (widget, window, &tx, &ty))
{
event_x += tx;
event_y += ty;
}
*widget_x = event_x;
*widget_y = event_y;
}
static gboolean
gtk3_ruler_track_widget_motion_notify (GtkWidget *widget,
GdkEventMotion *mevent,
Gtk3Ruler *ruler)
{
gint widget_x;
gint widget_y;
gint ruler_x;
gint ruler_y;
widget = gtk_get_event_widget ((GdkEvent *)mevent);
gtk3_ruler_event_to_widget_coords (widget, mevent->window,
mevent->x, mevent->y,
&widget_x, &widget_y);
if (gtk_widget_translate_coordinates (widget, GTK_WIDGET (ruler),
widget_x, widget_y,
&ruler_x, &ruler_y))
{
gtk3_ruler_update_position (ruler, ruler_x, ruler_y);
}
return FALSE;
}
void
gtk3_ruler_add_track_widget (Gtk3Ruler *ruler,
GtkWidget *widget)
{
Gtk3RulerPrivate *priv;
g_return_if_fail (GTK3_IS_RULER (ruler));
g_return_if_fail (GTK_IS_WIDGET (ruler));
priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->track_widgets != NULL)
{
GList *lf = g_list_find (priv->track_widgets, widget);
GList *fl = g_list_last (priv->track_widgets);
if (lf != NULL)
{
GtkWidget *wlf = lf->data;
GtkWidget *wfl = fl->data;
g_return_if_fail (wfl == wlf);
}
}
// priv->track_widgets->insert(widget);
priv->track_widgets = g_list_append(priv->track_widgets, widget);
g_signal_connect (widget, "motion-notify-event",
G_CALLBACK (gtk3_ruler_track_widget_motion_notify),
ruler);
g_signal_connect (widget, "destroy",
G_CALLBACK (gtk3_ruler_remove_track_widget),
ruler);
}
/**
* gtk3_ruler_remove_track_widget:
* @ruler: an #Gtk3Ruler
* @widget: the track widget to remove
*
* Removes a previously added track widget from the ruler. See
* gtk3_ruler_add_track_widget().
*/
void
gtk3_ruler_remove_track_widget (Gtk3Ruler *ruler,
GtkWidget *widget)
{
if (!GTK3_IS_RULER (ruler)) return;
g_return_if_fail (GTK_IS_WIDGET (ruler));
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->track_widgets == NULL) return;
GList *lf = g_list_find (priv->track_widgets, widget);
GList *fl = g_list_last (priv->track_widgets);
if (lf != NULL)
{
GtkWidget *wlf = lf->data;
GtkWidget *wfl = fl->data;
g_return_if_fail (wfl == wlf);
}
g_signal_handlers_disconnect_by_func (widget,
(gpointer) G_CALLBACK (gtk3_ruler_track_widget_motion_notify),
ruler);
g_signal_handlers_disconnect_by_func (widget,
(gpointer) G_CALLBACK (gtk3_ruler_remove_track_widget),
ruler);
// priv->track_widgets->erase(widget);
// gtk_widget_destroy (widget);
}
/**
* gtk3_ruler_set_unit:
* @ruler: a #Gtk3Ruler
* @unit: the #SPMetric to set the ruler to
*
* This sets the unit of the ruler.
*/
void
gtk3_ruler_set_unit (Gtk3Ruler *ruler,
Gtk3RulerMetricUnit unit)
{
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
g_return_if_fail (GTK3_IS_RULER (ruler));
if (priv->unit != unit)
{
priv->unit = unit;
switch (unit)
{
case GTK3_RULER_METRIC_INCHES:
ruler_metric = ruler_metric_inches;
break;
#if 0
case GTK3_RULER_METRIC_FEET:
ruler_metric = ruler_metric_feet;
break;
case GTK3_RULER_METRIC_YARDS:
ruler_metric = ruler_metric_yards;
break;
#endif
default :
ruler_metric = ruler_metric_general;
break;
}
g_object_notify(G_OBJECT(ruler), "unit");
priv->backing_store_valid = FALSE;
gtk_widget_queue_draw (GTK_WIDGET (ruler));
}
}
/**
* gtk3_ruler_get_unit:
* @ruler: a #Gtk3Ruler
*
* Return value: the unit currently used in the @ruler widget.
**/
Gtk3RulerMetricUnit
gtk3_ruler_get_unit (Gtk3Ruler *ruler)
{
return GTK3_RULER_GET_PRIVATE (ruler)->unit;
}
/**
* gtk3_ruler_set_position:
* @ruler: a #Gtk3Ruler
* @position: the position to set the ruler to
*
* This sets the position of the ruler.
*/
void
gtk3_ruler_set_position (Gtk3Ruler *ruler,
gdouble position)
{
Gtk3RulerPrivate *priv;
g_return_if_fail (GTK3_IS_RULER (ruler));
priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->position != position)
{
GdkRectangle rect;
gint xdiff, ydiff;
priv->position = position;
g_object_notify (G_OBJECT (ruler), "position");
rect = gtk3_ruler_get_pos_rect (ruler, priv->position);
xdiff = rect.x - priv->last_pos_rect.x;
ydiff = rect.y - priv->last_pos_rect.y;
/*
* If the position has changed far enough, queue a redraw immediately.
* Otherwise, we only queue a redraw in a low priority idle handler, to
* allow for other things (like updating the canvas) to run.
*
* TODO: This might not be necessary any more in GTK3 with the frame
* clock. Investigate this more after the port to GTK3.
*/
if (priv->last_pos_rect.width != 0 &&
priv->last_pos_rect.height != 0 &&
(ABS (xdiff) > IMMEDIATE_REDRAW_THRESHOLD ||
ABS (ydiff) > IMMEDIATE_REDRAW_THRESHOLD))
{
if (priv->pos_redraw_idle_id)
{
g_source_remove (priv->pos_redraw_idle_id);
priv->pos_redraw_idle_id = 0;
}
gtk3_ruler_queue_pos_redraw (ruler);
}
else if (! priv->pos_redraw_idle_id)
{
priv->pos_redraw_idle_id =
g_idle_add_full (G_PRIORITY_LOW,
gtk3_ruler_idle_queue_pos_redraw,
ruler, NULL);
}
}
}
/**
* gtk3_ruler_get_position:
* @ruler: a #Gtk3Ruler
*
* Return value: the current position of the @ruler widget.
*/
gdouble
gtk3_ruler_get_position (Gtk3Ruler *ruler)
{
g_return_val_if_fail (GTK3_IS_RULER (ruler), 0.0);
return GTK3_RULER_GET_PRIVATE (ruler)->position;
}
static gboolean
gtk3_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
Gtk3Ruler *ruler = GTK3_RULER(widget);
gtk3_ruler_update_position (ruler, event->x, event->y);
return FALSE;
}
static void
gtk3_ruler_draw_ticks (Gtk3Ruler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder border;
GdkRGBA color;
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
cairo_t *cr;
gint i;
gint width, height;
gint length, ideal_length;
gdouble lower, upper; /* Upper and lower limits, in ruler units */
gdouble increment; /* Number of pixels per unit */
guint scale; /* Number of units per major unit */
gdouble start, end, cur;
gchar unit_str[32];
gint digit_height;
gint digit_offset;
gchar digit_str[2] = { '\0', '\0' };
gint text_size;
gdouble pos;
gdouble max_size;
Gtk3RulerMetricUnit unit;
Gtk3RulerMetric ruler_metric = ruler_metric_general; /* The metric to use for this unit system */
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
GtkStateFlags state_flags = gtk_style_context_get_state (context);
gtk_style_context_get_border (context, state_flags, &border);
layout = gtk3_ruler_get_layout (widget, "0123456789");
pango_layout_get_extents (layout, &ink_rect, &logical_rect);
digit_height = PANGO_PIXELS (ink_rect.height) + 2;
digit_offset = ink_rect.y;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - (border.top + border.bottom);
}
else
{
width = allocation.height;
height = allocation.width - (border.top + border.bottom);
}
cr = cairo_create (priv->backing_store);
cairo_set_line_width(cr, 1.0);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
border.left,
height + border.top,
allocation.width - (border.left + border.right),
1);
}
else
{
cairo_rectangle (cr,
height + border.left,
border.top,
1,
allocation.height - (border.top + border.bottom));
}
gtk3_ruler_get_range (ruler, &lower, &upper, &max_size);
if ((upper - lower) == 0)
goto out;
increment = (gdouble) width / (upper - lower);
/* determine the scale
* Use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*
* We calculate the text size as for the vruler instead of
* actually measuring the text width, so that the result for the
* scale looks consistent with an accompanying vruler
*/
scale = ceil (priv->max_size);
sprintf (unit_str, "%d", scale);
text_size = strlen (unit_str) * digit_height + 1;
/* Inkscape change to ruler: Use a 1,2,4,8... scale for inches
* or a 1,2,5,10... scale for everything else */
if (gtk3_ruler_get_unit (ruler) == GTK3_RULER_METRIC_INCHES)
ruler_metric = ruler_metric_inches;
for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_size)
break;
if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;
unit = gtk3_ruler_get_unit (ruler);
/* drawing starts here */
length = 0;
for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
{
gdouble subd_incr;
/* hack to get proper subdivisions at full pixels */
if (unit == GTK3_RULER_METRIC_INCHES && scale == 1 && i == 1)
subd_incr = 1.0;
else
subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
(gdouble) ruler_metric.subdivide[i]);
if (subd_incr * fabs (increment) <= MINIMUM_INCR)
continue;
/* Calculate the length of the tickmarks. Make sure that
* this length increases for each set of ticks
*/
ideal_length = height / (i + 1) - 1;
if (ideal_length > ++length)
length = ideal_length;
if (lower < upper)
{
start = floor (lower / subd_incr) * subd_incr;
end = ceil (upper / subd_incr) * subd_incr;
}
else
{
start = floor (upper / subd_incr) * subd_incr;
end = ceil (lower / subd_incr) * subd_incr;
}
gint tick_index = 0;
for (cur = start; cur <= end; cur += subd_incr)
{
pos = floor((cur - lower) * increment) + 0.5;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_move_to(cr, pos, height + border.top - length);
cairo_line_to(cr, pos, height + border.top);
}
else
{
cairo_move_to(cr, height + border.left - length, pos);
cairo_line_to(cr, height + border.left , pos);
}
cairo_stroke(cr);
/* draw label */
double label_spacing_px = fabs(increment*(double)ruler_metric.ruler_scale[scale]/ruler_metric.subdivide[i]);
if (i == 0 &&
(label_spacing_px > 6*digit_height || tick_index%2 == 0 || cur == 0) &&
(label_spacing_px > 3*digit_height || tick_index%4 == 0 || cur == 0))
{
if (abs((int)cur) >= 2000 && (((int) cur)/1000)*1000 == ((int) cur))
sprintf (unit_str, "%dk", ((int) cur)/1000);
else
sprintf (unit_str, "%d", (int) cur);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
pango_layout_set_text (layout, unit_str, -1);
pango_layout_get_extents (layout, &logical_rect, NULL);
cairo_move_to (cr,
pos + 2,
border.top + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout(cr, layout);
}
else
{
gint j;
for (j = 0; j < (int) strlen (unit_str); j++)
{
digit_str[0] = unit_str[j];
pango_layout_set_text (layout, digit_str, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
cairo_move_to (cr,
border.left + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
}
}
}
++tick_index;
}
}
cairo_fill (cr);
priv->backing_store_valid = TRUE;
out:
cairo_destroy (cr);
}
static GdkRectangle
gtk3_ruler_get_pos_rect (Gtk3Ruler *ruler,
gdouble position)
{
GtkWidget *widget = GTK_WIDGET (ruler);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gint width, height;
gint xthickness;
gint ythickness;
gdouble upper, lower;
gdouble increment;
GdkRectangle rect = { 0, 0, 0, 0 };
if (! gtk_widget_is_drawable (widget))
return rect;
gtk_widget_get_allocation (widget, &allocation);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkBorder padding;
GtkStateFlags state_flags = gtk_style_context_get_state (context);
gtk_style_context_get_border(context, state_flags, &padding);
xthickness = padding.left + padding.right;
ythickness = padding.top + padding.bottom;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
rect.width = height / 2 + 2;
rect.width |= 1; /* make sure it's odd */
rect.height = rect.width / 2 + 1;
}
else
{
width = allocation.width - xthickness * 2;
height = allocation.height;
rect.height = width / 2 + 2;
rect.height |= 1; /* make sure it's odd */
rect.width = rect.height / 2 + 1;
}
gtk3_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
increment = (gdouble) width / (upper - lower);
rect.x = ROUND ((position - lower) * increment) + (xthickness - rect.width) / 2 - 1;
rect.y = (height + rect.height) / 2 + ythickness;
}
else
{
increment = (gdouble) height / (upper - lower);
rect.x = (width + rect.width) / 2 + xthickness;
rect.y = ROUND ((position - lower) * increment) + (ythickness - rect.height) / 2 - 1;
}
return rect;
}
static gboolean
gtk3_ruler_idle_queue_pos_redraw (gpointer data)
{
Gtk3Ruler *ruler = (Gtk3Ruler *)data;
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
gtk3_ruler_queue_pos_redraw (ruler);
gboolean ret = g_source_remove(priv->pos_redraw_idle_id);
priv->pos_redraw_idle_id = 0;
return ret;
}
static void
gtk3_ruler_queue_pos_redraw (Gtk3Ruler *ruler)
{
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
const GdkRectangle rect = gtk3_ruler_get_pos_rect (ruler, priv->position);
GtkAllocation allocation;
gtk_widget_get_allocation (GTK_WIDGET(ruler), &allocation);
gtk_widget_queue_draw_area (GTK_WIDGET (ruler),
rect.x + allocation.x,
rect.y + allocation.y,
rect.width,
rect.height);
if (priv->last_pos_rect.width != 0 &&
priv->last_pos_rect.height != 0)
{
gtk_widget_queue_draw_area (GTK_WIDGET (ruler),
priv->last_pos_rect.x + allocation.x,
priv->last_pos_rect.y + allocation.y,
priv->last_pos_rect.width,
priv->last_pos_rect.height);
priv->last_pos_rect.x = 0;
priv->last_pos_rect.y = 0;
priv->last_pos_rect.width = 0;
priv->last_pos_rect.height = 0;
}
}
static PangoLayout*
gtk3_ruler_create_layout (GtkWidget *widget,
const gchar *text)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
PangoLayout *layout;
PangoAttrList *attrs;
PangoAttribute *attr;
layout = gtk_widget_create_pango_layout (widget, text);
attrs = pango_attr_list_new ();
attr = pango_attr_scale_new (priv->font_scale);
attr->start_index = 0;
attr->end_index = -1;
pango_attr_list_insert (attrs, attr);
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
return layout;
}
static PangoLayout *
gtk3_ruler_get_layout (GtkWidget *widget,
const gchar *text)
{
Gtk3Ruler *ruler = GTK3_RULER (widget);
Gtk3RulerPrivate *priv = GTK3_RULER_GET_PRIVATE (ruler);
if (priv->layout)
{
pango_layout_set_text (priv->layout, text, -1);
return priv->layout;
}
priv->layout = gtk3_ruler_create_layout (widget, text);
return priv->layout;
}
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