Tween & Timeline now extend EventDispatcher. Tween waits to add itself as a listener on Ticker until the first tween starts.

Signed-off-by: Grant Skinner <info@gskinner.com>

Author: gskinner

VERSIONS.txt

@@ -21,6 +21,7 @@ CRITICAL (may break existing content):
 - fixed an issue with EventDispatcher when adding the same listener to an event twice
 - fixed hasActiveTweens to return a Boolean consistently
 - added Timeline.getLabels() & getCurrentLabel()
+- Tween waits to add itself as a listener on Ticker until the first tween is started
 
 
 Version 0.4.1 [May 10, 2013]

docs/TweenJS_docs-NEXT.zip

@@ -52,7 +52,6 @@ this.createjs = this.createjs||{};
  * @param {String} type The event type.
  * @param {Boolean} bubbles Indicates whether the event will bubble through the display list.
  * @param {Boolean} cancelable Indicates whether the default behaviour of this event can be cancelled.
- * @uses EventDispatcher
  * @constructor
  **/
 var Event = function(type, bubbles, cancelable) {

examples/assets/easeljs-NEXT.min.js

@@ -53,13 +53,13 @@ this.createjs = this.createjs||{};
  *    <LI> position: indicates the initial position for this timeline.</LI>
  *    <LI> onChange: specifies a listener to add for the {{#crossLink "Timeline/change:event"}}{{/crossLink}} event.</LI>
  * </UL>
- * @uses EventDispatcher
+ * @extends EventDispatcher
  * @constructor
  **/
 var Timeline = function(tweens, labels, props) {
   this.initialize(tweens, labels, props);
 };
-var p = Timeline.prototype;
+var p = Timeline.prototype = new createjs.EventDispatcher();
 
 // public properties:
 
@@ -109,17 +109,6 @@ var p = Timeline.prototype;
 	 * @since 0.5.0
 	 **/
 
-// mix-ins:
-	// EventDispatcher methods:
-	p.addEventListener = null;
-	p.removeEventListener = null;
-	p.removeAllEventListeners = null;
-	p.dispatchEvent = null;
-	p.hasEventListener = null;
-	p._listeners = null;
-
-	createjs.EventDispatcher.initialize(p); // inject EventDispatcher methods.
-
 // private properties:
 
 	/**

lib/tweenjs-NEXT.min.js

@@ -120,13 +120,13 @@ this.createjs = this.createjs||{};
  * </UL>
  * @param {Object} [pluginData] An object containing data for use by installed plugins. See individual
  * plugins' documentation for details.
- * @uses EventDispatcher
+ * @extends EventDispatcher
  * @constructor
  */
 var Tween = function(target, props, pluginData) {
   this.initialize(target, props, pluginData);
 };
-var p = Tween.prototype;
+var p = Tween.prototype = new createjs.EventDispatcher();
 
 // static interface:
 	/**
@@ -231,9 +231,6 @@ var p = Tween.prototype;
 		}
 	};
 
-	// Static initialization of Ticker.
-	if (createjs.Ticker) { createjs.Ticker.addEventListener("tick", Tween); }
-
 	/**
 	 * Handle events that result from Tween being used as an event handler. This is included to allow Tween to handle
 	 * tick events from <code>createjs.Ticker</code>. No other events are handled in Tween.
@@ -324,6 +321,8 @@ var p = Tween.prototype;
 	/**
 	 * Registers or unregisters a tween with the ticking system.
 	 * @method _register
+	 * @param {Tween} tween The tween instance to register or unregister.
+	 * @param {Boolean} value If true, the tween is registered. If false the tween is unregistered. 
 	 * @static
 	 * @protected
 	 */
@@ -334,6 +333,7 @@ var p = Tween.prototype;
 			// TODO: this approach might fail if a dev is using sealed objects in ES5
 			if (target) { target.tweenjs_count = target.tweenjs_count ? target.tweenjs_count+1 : 1; }
 			tweens.push(tween);
+			if (!Tween._inited && createjs.Ticker) { createjs.Ticker.addEventListener("tick", Tween); Tween._inited = true; }
 		} else {
 			if (target) { target.tweenjs_count--; }
 			var i = tweens.length;
@@ -346,17 +346,6 @@ var p = Tween.prototype;
 		}
 	};
 
-// mix-ins:
-	// EventDispatcher methods:
-	p.addEventListener = null;
-	p.removeEventListener = null;
-	p.removeAllEventListeners = null;
-	p.dispatchEvent = null;
-	p.hasEventListener = null;
-	p._listeners = null;
-
-	createjs.EventDispatcher.initialize(p); // inject EventDispatcher methods.
-
 // public properties:
 	/**
 	 * Causes this tween to continue playing when a global pause is active. For example, if TweenJS is using Ticker,
@@ -522,6 +511,14 @@ var p = Tween.prototype;
 	 */
 	p._useTicks = false;
 
+	/**
+	 * @property _inited
+	 * @type {boolean}
+	 * @default false
+	 * @protected
+	 */
+	p._inited = false;
+
 // constructor:
 	/**
 	 * @method initialize

src/createjs/events/Event.js

@@ -27,6 +27,6 @@ this.createjs = this.createjs || {};
 	 * @type String
 	 * @static
 	 **/
-	s.buildDate = /*date*/"Mon, 12 Aug 2013 16:06:01 GMT"; // injected by build process
+	s.buildDate = /*date*/"Tue, 27 Aug 2013 17:44:21 GMT"; // injected by build process
 
 })();