removed "When switched to this scene hat block"

HISTORY.md

@@ -11,7 +11,7 @@
     * user defined custom block palettes
     * PWA, thanks, Joan and John, for pioneering this at Robolot and in Mircoblocks!
     * new "blocksZoom=n" url parameter, thanks, Bernat!
-    * message, key and scene hat blocks can be expanded to show an optional upvar referencing their event data
+    * message and key hat blocks can be expanded to show an optional upvar referencing their event data
     * added "enter" key to key-pressed dropdown
     * added "green flag" symbol to message drop-down
 * **Notable Changes:**
@@ -43,6 +43,7 @@
 
 ### 2021-10-20
 * blocks: enable sending green-flag events when switching scenes
+* blocks, objects, gui, threads: removed "When switched to this scene hat block"
 
 ### 2021-10-19
 * threads: enable sending green-flag events to specific sprites

snap.html

@@ -17,10 +17,10 @@
         <script src="src/symbols.js?version=2021-03-03"></script>
         <script src="src/widgets.js?version=2021-07-21"></script>
         <script src="src/blocks.js?version=2021-10-20"></script>
-        <script src="src/threads.js?version=2021-10-19"></script>
+        <script src="src/threads.js?version=2021-10-20"></script>
-        <script src="src/objects.js?version=2021-10-14"></script>
+        <script src="src/objects.js?version=2021-10-20"></script>
         <script src="src/scenes.js?version=2021-10-12"></script>
-        <script src="src/gui.js?version=2021-10-14"></script>
+        <script src="src/gui.js?version=2021-10-20"></script>
         <script src="src/paint.js?version=2021-07-05"></script>
         <script src="src/lists.js?version=2021-07-19"></script>
         <script src="src/byob.js?version=2021-10-14"></script>

src/blocks.js

@@ -3177,8 +3177,6 @@ BlockMorph.prototype.showMessageUsers = function () {
         message = '__shout__go__';
     } else if (this.selector === 'receiveOnClone') {
         message = '__clone__init__';
-    } else if (this.selector === 'receiveOnScene') {
-        message = '__scene__init__';
     } else if (inputs[0] instanceof InputSlotMorph) {
         message = inputs[0].evaluate();
     }

src/gui.js

@@ -85,7 +85,7 @@ Animation, BoxMorph, BlockDialogMorph, RingMorph, Project, ZERO, BLACK*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2021-October-14';
+modules.gui = '2021-October-20';
 
 // Declarations
 
@@ -5830,7 +5830,9 @@ IDE_Morph.prototype.switchToScene = function (scene, refreshAlbum, msg) {
     }
     this.toggleAppMode(appMode);
     this.world().keyboardFocus = this.stage;
-    this.stage.fireChangeOfSceneEvent(msg);
+    if (msg) {
+        this.stage.fireChangeOfSceneEvent(msg);
+    }
 };
 
 IDE_Morph.prototype.setURL = function (str) {

src/objects.js

@@ -87,7 +87,7 @@ BlockVisibilityDialogMorph*/
 
 /*jshint esversion: 6*/
 
-modules.objects = '2021-October-14';
+modules.objects = '2021-October-20';
 
 var SpriteMorph;
 var StageMorph;
@@ -907,11 +907,6 @@ SpriteMorph.prototype.initBlocks = function () {
         },
 
         // Scenes
-        receiveOnScene: {
-            type: 'hat',
-            category: 'control',
-            spec: 'when switched to this scene %message'
-        },
         doSwitchToScene: {
             type: 'command',
             category: 'control',
@@ -2557,7 +2552,6 @@ SpriteMorph.prototype.blockTemplates = function (
         blocks.push(block('newClone'));
         blocks.push(block('removeClone'));
         blocks.push('-');
-        blocks.push(block('receiveOnScene'));
         blocks.push(block('doSwitchToScene'));
         blocks.push('-');
         blocks.push(block('doPauseAll'));
@@ -6095,8 +6089,7 @@ SpriteMorph.prototype.allHatBlocksFor = function (message) {
                 return event === message
                     || (event instanceof Array
                         && message !== '__shout__go__'
-                        && message !== '__clone__init__'
+                        && message !== '__clone__init__');
-                        && message !== '__scene__init__');
             }
             if (sel === 'receiveGo') {
                 return message === '__shout__go__';
@@ -6104,9 +6097,6 @@ SpriteMorph.prototype.allHatBlocksFor = function (message) {
             if (sel === 'receiveOnClone') {
                 return message === '__clone__init__';
             }
-            if (sel === 'receiveOnScene') {
-                return message === '__scene__init__';
-            }
         }
         return false;
     });
@@ -8472,24 +8462,32 @@ StageMorph.prototype.fireChangeOfSceneEvent = function (message) {
 
     this.children.concat(this).forEach(morph => {
         if (isSnapObject(morph)) {
-            morph.allHatBlocksFor('__scene__init__').forEach(block => {
+            morph.allHatBlocksFor(message).forEach(block => {
-                var varName =  block.inputs()[0].evaluate()[0],
+                var varName, varFrame;
-                    varFrame;
+                if (block.selector === 'receiveMessage') {
-                if (varName) {
+                    varName = block.inputs()[1].evaluate()[0];
-                    varFrame = new VariableFrame();
+                    if (varName) {
-                    varFrame.addVar(varName, isNil(message) ? '' : message);
+                        varFrame = new VariableFrame();
+                        varFrame.addVar(varName, message);
+                    }
+                    procs.push(this.threads.startProcess(
+                        block,
+                        morph,
+                        this.isThreadSafe,
+                        null, // exportResult (bool)
+                        null, // callback
+                        null, // isClicked
+                        null, // rightAway
+                        null, // atomic
+                        varFrame
+                    ));
+                } else {
+                    procs.push(this.threads.startProcess(
+                        block,
+                        morph,
+                        this.isThreadSafe
+                    ));
                 }
-                procs.push(this.threads.startProcess(
-                    block,
-                    morph,
-                    this.isThreadSafe,
-                    null, // exportResult (bool)
-                    null, // callback
-                    null, // isClicked
-                    null, // rightAway
-                    null, // atomic
-                    varFrame
-                ));
             });
         }
     });
@@ -8799,7 +8797,6 @@ StageMorph.prototype.blockTemplates = function (
         blocks.push(block('createClone'));
         blocks.push(block('newClone'));
         blocks.push('-');
-        blocks.push(block('receiveOnScene'));
         blocks.push(block('doSwitchToScene'));
         blocks.push('-');
         blocks.push(block('doPauseAll'));

src/threads.js

@@ -64,7 +64,7 @@ SnapExtensions, AlignmentMorph, TextMorph, Cloud*/
 
 /*jshint esversion: 6*/
 
-modules.threads = '2021-October-19';
+modules.threads = '2021-October-20';
 
 var ThreadManager;
 var Process;
@@ -4700,11 +4700,11 @@ Process.prototype.goToLayer = function (name) {
 Process.prototype.doSwitchToScene = function (id, transmission) {
     var rcvr = this.blockReceiver(),
         idx = 0,
-        message = transmission.at(1),
+        message = this.inputOption(transmission.at(1)),
         ide, scenes, num, scene;
     this.assertAlive(rcvr);
     this.assertType(message, ['text', 'number']);
-    if (this.readyToTerminate || this.topBlock.selector === 'receiveOnScene') {
+    if (this.readyToTerminate) {
         // let the user press "stop" or "esc",
         // prevent "when this scene starts" hat blocks from directly
         // switching to another