MadButterfly: nodejs/animate.js comparison

comparison nodejs/animate.js @ 831:904b6928f727

Add animation.alpha

author	wycc
date	Wed, 15 Sep 2010 01:19:20 +0800
parents	586e50f82c1f
children	3c48a77b75d3

comparison

equal deleted inserted replaced

-:2a73ff24c141
+:904b6928f727
 	this._app.refresh();
 }
 };
 exports.holder = holder;
+function alpha_draw() {
+if (this.end == 1) return;
+var percent = (Date.now() - this.starttime)/this.duration;
+if (percent > 1) percent = 1;
+var sx = (this.targetalpha-this.startalpha)*percent+this.startalpha;
+sys.puts("opacity="+sx);
+this.obj.opacity=sx;
+this.app.refresh();
+var self = this;
+if (percent < 1) {
+	this.obj.timer=setTimeout(function() { self.draw();}, 20);
+	return;
+}
+this.app.refresh();
+this.obj.animated_alpha = null;
+}
+function alpha(app,obj,alpha, duration) {
+try {
+if (obj.animated_alpha) {
+	    obj.animated_alpha.end = 1;
+	}
+} catch(e) {
+}
+obj.animated_alpha = this;
+this.app = app;
+this.obj = obj;
+this.end = 0;
+this.starttime = Date.now();
+this.startalpha = obj.opacity;
+this.targetalpha = alpha;
+this.duration = duration*1000;
+}
+alpha.prototype.start = alpha_draw;
+alpha.prototype.draw = alpha_draw;
+exports.alpha = alpha;