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Add support for when backdrop switches to block #57

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Merged
merged 2 commits into from
Jul 24, 2022
Merged

Add support for when backdrop switches to block #57

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13ae01a
Add support for when backdrop changed block
apple502j Mar 17, 2020
0f9bdfe
Return started threads from fireBackdropChanged
adroitwhiz Jul 19, 2022
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11 changes: 10 additions & 1 deletion example-project/Giga/Giga.js
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,12 @@ export default class Giga extends Sprite {

this.triggers = [
new Trigger(Trigger.CLICKED, this.whenthisspriteclicked),
new Trigger(Trigger.GREEN_FLAG, this.whenGreenFlagClicked)
new Trigger(Trigger.GREEN_FLAG, this.whenGreenFlagClicked),
new Trigger(
Trigger.BACKDROP_CHANGED,
{ backdrop: "giga" },
this.whenBackdropChanged
)
];

this.visible = false;
Expand All @@ -24,4 +29,8 @@ export default class Giga extends Sprite {
*whenGreenFlagClicked() {
this.costume = "giga-a";
}

*whenBackdropChanged() {
yield* this.sayAndWait("It's me!", 2);
}
}
11 changes: 10 additions & 1 deletion example-project/Gobo/Gobo.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,12 @@ export default class Gobo extends Sprite {

this.triggers = [
new Trigger(Trigger.CLICKED, this.whenthisspriteclicked),
new Trigger(Trigger.GREEN_FLAG, this.whenGreenFlagClicked)
new Trigger(Trigger.GREEN_FLAG, this.whenGreenFlagClicked),
new Trigger(
Trigger.BACKDROP_CHANGED,
{ backdrop: "gobo" },
this.whenBackdropChanged
)
];

this.visible = false;
Expand All @@ -25,4 +30,8 @@ export default class Gobo extends Sprite {
*whenGreenFlagClicked() {
this.costume = "goboA";
}

*whenBackdropChanged() {
yield* this.sayAndWait("It's me!", 2);
}
}
7 changes: 7 additions & 0 deletions src/Sprite.js
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,7 @@ class SpriteBase {

set costumeNumber(number) {
this._costumeNumber = ((number - 1) % this.costumes.length) + 1;
if (this.fireBackdropChanged) this.fireBackdropChanged();
}

set costume(costume) {
Expand Down Expand Up @@ -646,4 +647,10 @@ export class Stage extends SpriteBase {
// For obsolete counter blocks.
this.__counter = 0;
}

fireBackdropChanged() {
return this._project.fireTrigger(Trigger.BACKDROP_CHANGED, {
backdrop: this.costume.name
});
}
}
4 changes: 4 additions & 0 deletions src/Trigger.js
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Expand Up @@ -4,6 +4,7 @@ const BROADCAST = Symbol("BROADCAST");
const CLICKED = Symbol("CLICKED");
const CLONE_START = Symbol("CLONE_START");
const TIMER_GREATER_THAN = Symbol("TIMER_GREATER_THAN");
const BACKDROP_CHANGED = Symbol("BACKDROP_CHANGED");

export default class Trigger {
constructor(trigger, options, script) {
Expand Down Expand Up @@ -85,4 +86,7 @@ export default class Trigger {
static get TIMER_GREATER_THAN() {
return TIMER_GREATER_THAN;
}
static get BACKDROP_CHANGED() {
return BACKDROP_CHANGED;
}
}