video/user_guide/nav/moo.fx.js

   1 /*
   2 moo.fx, simple effects library built with prototype.js (http://prototype.conio.net).
   3 by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE.
   4 for more info (http://moofx.mad4milk.net).
   5 10/24/2005
   6 v(1.0.2)
   7 */
   8
   9 //base
  10 var fx = new Object();
  11 fx.Base = function(){};
  12 fx.Base.prototype = {
  13         setOptions: function(options) {
  14         this.options = {
  15                 duration: 500,
  16                 onComplete: ''
  17         }
  18         Object.extend(this.options, options || {});
  19         },
  20
  21         go: function() {
  22                 this.duration = this.options.duration;
  23                 this.startTime = (new Date).getTime();
  24                 this.timer = setInterval (this.step.bind(this), 13);
  25         },
  26
  27         step: function() {
  28                 var time  = (new Date).getTime();
  29                 var Tpos   = (time - this.startTime) / (this.duration);
  30                 if (time >= this.duration+this.startTime) {
  31                         this.now = this.to;
  32                         clearInterval (this.timer);
  33                         this.timer = null;
  34                         if (this.options.onComplete) setTimeout(this.options.onComplete.bind(this), 10);
  35                 }
  36                 else {
  37                         this.now = ((-Math.cos(Tpos*Math.PI)/2) + 0.5) * (this.to-this.from) + this.from;
  38                         //this time-position, sinoidal transition thing is from script.aculo.us
  39                 }
  40                 this.increase();
  41         },
  42
  43         custom: function(from, to) {
  44                 if (this.timer != null) return;
  45                 this.from = from;
  46                 this.to = to;
  47                 this.go();
  48         },
  49
  50         hide: function() {
  51                 this.now = 0;
  52                 this.increase();
  53         },
  54
  55         clearTimer: function() {
  56                 clearInterval(this.timer);
  57                 this.timer = null;
  58         }
  59 }
  60
  61 //stretchers
  62 fx.Layout = Class.create();
  63 fx.Layout.prototype = Object.extend(new fx.Base(), {
  64         initialize: function(el, options) {
  65                 this.el = $(el);
  66                 this.el.style.overflow = "hidden";
  67                 this.el.iniWidth = this.el.offsetWidth;
  68                 this.el.iniHeight = this.el.offsetHeight;
  69                 this.setOptions(options);
  70         }
  71 });
  72
  73 fx.Height = Class.create();
  74 Object.extend(Object.extend(fx.Height.prototype, fx.Layout.prototype), {
  75         increase: function() {
  76                 this.el.style.height = this.now + "px";
  77         },
  78
  79         toggle: function() {
  80                 if (this.el.offsetHeight > 0) this.custom(this.el.offsetHeight, 0);
  81                 else this.custom(0, this.el.scrollHeight);
  82         }
  83 });