morphic tweaks

snap.html

@@ -4,13 +4,13 @@
         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
         <title>Snap! Build Your Own Blocks 6.0.1 - dev -</title>
         <link rel="shortcut icon" href="src/favicon.ico">
-        <script src="src/morphic.js?version=2020-07-15"></script>
+        <script src="src/morphic.js?version=2020-07-16"></script>
         <script src="src/symbols.js?version=2020-07-01"></script>
         <script src="src/widgets.js?version=2020-07-13"></script>
         <script src="src/blocks.js?version=2020-07-15"></script>
         <script src="src/threads.js?version=2020-07-09"></script>
         <script src="src/objects.js?version=2020-07-13"></script>
-        <script src="src/gui.js?version=2020-07-15"></script>
+        <script src="src/gui.js?version=2020-07-16"></script>
         <script src="src/paint.js?version=2020-05-17"></script>
         <script src="src/lists.js?version=2020-07-01"></script>
         <script src="src/byob.js?version=2020-07-01"></script>

src/gui.js

@@ -78,7 +78,7 @@ Animation, BoxMorph, BlockEditorMorph, BlockDialogMorph, Note, ZERO, BLACK*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2020-July-15';
+modules.gui = '2020-July-16';
 
 // Declarations
 
@@ -1629,7 +1629,7 @@ IDE_Morph.prototype.createSpriteEditor = function () {
             if (morph instanceof BlockMorph) {
                 this.spriteBar.tabBar.tabTo('scripts');
             }
-        }
+        };
     } else if (this.currentTab === 'sounds') {
         this.spriteEditor = new JukeboxMorph(
             this.currentSprite,
@@ -1645,7 +1645,7 @@ IDE_Morph.prototype.createSpriteEditor = function () {
             if (morph instanceof BlockMorph) {
                 this.spriteBar.tabBar.tabTo('scripts');
             }
-        }
+        };
     } else {
         this.spriteEditor = new Morph();
         this.spriteEditor.color = this.groupColor;
@@ -3124,6 +3124,32 @@ IDE_Morph.prototype.settingsMenu = function () {
                 'before it picks up an object',
             new Color(100, 0, 0)
         );
+        /*
+        menu.addItem(
+            "Block alpha...",
+            () => {
+                world.prompt(
+                    'Block alpha',
+                    alpha => {
+                        SyntaxElementMorph.prototype.setAlphaScaled(alpha);
+                        this.rerender();
+                    },
+                    this,
+                    (SyntaxElementMorph.prototype.alpha * 100).toString(),
+                    null,
+                    0,
+                    100,
+                    true,
+                    alpha => {
+                        SyntaxElementMorph.prototype.setAlphaScaled(alpha);
+                        this.rerender();
+                    },
+                );
+            },
+            'set the blocks\'\nalpha value',
+            new Color(100, 0, 0)
+        );
+        */
     }
     menu.addItem(
         'Microphone resolution...',

src/morphic.js

@@ -1276,7 +1276,7 @@
 
 /*global window, HTMLCanvasElement, FileReader, Audio, FileList, Map*/
 
-var morphicVersion = '2020-July-15';
+var morphicVersion = '2020-July-16';
 var modules = {}; // keep track of additional loaded modules
 var useBlurredShadows = true;
 
@@ -4166,7 +4166,8 @@ Morph.prototype.prompt = function (
     width,
     floorNum,
     ceilingNum,
-    isRounded
+    isRounded,
+    action = nop
 ) {
     var menu, entryField, slider, isNumeric;
     if (ceilingNum) {
@@ -4210,6 +4211,7 @@ Morph.prototype.prompt = function (
                 entryField.text.fixLayout();
                 entryField.text.changed();
                 entryField.text.edit();
+                action(Math.round(num));
             };
         } else {
             slider.action = (num) => {
@@ -4217,6 +4219,7 @@ Morph.prototype.prompt = function (
                 entryField.text.text = num.toString();
                 entryField.text.fixLayout();
                 entryField.text.changed();
+                action(num);
             };
         }
         menu.items.push(slider);
@@ -4224,7 +4227,13 @@ Morph.prototype.prompt = function (
 
     menu.addLine(2);
     menu.addItem('Ok', () => entryField.string());
-    menu.addItem('Cancel', () => null);
+    menu.addItem(
+        'Cancel',
+        () => {
+            action(defaultContents);
+            return null;
+        }
+    );
     menu.isDraggable = true;
     menu.popUpAtHand(this.world());
     entryField.text.edit();
@@ -4444,12 +4453,12 @@ Morph.prototype.setAlphaScaled = function (alpha) {
     var newAlpha, unscaled;
     if (typeof alpha === 'number') {
         unscaled = alpha / 100;
-        this.alpha = Math.min(Math.max(unscaled, 0.1), 1);
+        this.alpha = Math.min(Math.max(unscaled, 0), 1);
     } else {
         newAlpha = parseFloat(alpha);
         if (!isNaN(newAlpha)) {
             unscaled = newAlpha / 100;
-            this.alpha = Math.min(Math.max(unscaled, 0.1), 1);
+            this.alpha = Math.min(Math.max(unscaled, 0), 1);
         }
     }
     this.changed();
@@ -6971,9 +6980,9 @@ SliderMorph.uber = CircleBoxMorph.prototype;
 
 function SliderMorph(start, stop, value, size, orientation, color) {
     this.init(
-        start || 1,
+        start || 0,
         stop || 100,
-        value || 50,
+        value || 0,
         size || 10,
         orientation || 'vertical',
         color