git.roojs.org Git - roojs1/blob - Roo/lib/AnimMgr.js

   1
   2 /*
   3  * Portions of this file are based on pieces of Yahoo User Interface Library
   4  * Copyright (c) 2007, Yahoo! Inc. All rights reserved.
   5  * YUI licensed under the BSD License:
   6  * http://developer.yahoo.net/yui/license.txt
   7  * <script type="text/javascript">
   8  *
   9  */
  10
  11 Roo.lib.AnimMgr = new function() {
  12
  13         var thread = null;
  14
  15
  16         var queue = [];
  17
  18
  19         var tweenCount = 0;
  20
  21
  22         this.fps = 1000;
  23
  24
  25         this.delay = 1;
  26
  27
  28         this.registerElement = function(tween) {
  29             queue[queue.length] = tween;
  30             tweenCount += 1;
  31             tween._onStart.fire();
  32             this.start();
  33         };
  34
  35
  36         this.unRegister = function(tween, index) {
  37             tween._onComplete.fire();
  38             index = index || getIndex(tween);
  39             if (index != -1) {
  40                 queue.splice(index, 1);
  41             }
  42
  43             tweenCount -= 1;
  44             if (tweenCount <= 0) {
  45                 this.stop();
  46             }
  47         };
  48
  49
  50         this.start = function() {
  51             if (thread === null) {
  52                 thread = setInterval(this.run, this.delay);
  53             }
  54         };
  55
  56
  57         this.stop = function(tween) {
  58             if (!tween) {
  59                 clearInterval(thread);
  60
  61                 for (var i = 0, len = queue.length; i < len; ++i) {
  62                     if (queue[0].isAnimated()) {
  63                         this.unRegister(queue[0], 0);
  64                     }
  65                 }
  66
  67                 queue = [];
  68                 thread = null;
  69                 tweenCount = 0;
  70             }
  71             else {
  72                 this.unRegister(tween);
  73             }
  74         };
  75
  76
  77         this.run = function() {
  78             for (var i = 0, len = queue.length; i < len; ++i) {
  79                 var tween = queue[i];
  80                 if (!tween || !tween.isAnimated()) {
  81                     continue;
  82                 }
  83
  84                 if (tween.currentFrame < tween.totalFrames || tween.totalFrames === null)
  85                 {
  86                     tween.currentFrame += 1;
  87
  88                     if (tween.useSeconds) {
  89                         correctFrame(tween);
  90                     }
  91                     tween._onTween.fire();
  92                 }
  93                 else {
  94                     Roo.lib.AnimMgr.stop(tween, i);
  95                 }
  96             }
  97         };
  98
  99         var getIndex = function(anim) {
 100             for (var i = 0, len = queue.length; i < len; ++i) {
 101                 if (queue[i] == anim) {
 102                     return i;
 103                 }
 104             }
 105             return -1;
 106         };
 107
 108
 109         var correctFrame = function(tween) {
 110             var frames = tween.totalFrames;
 111             var frame = tween.currentFrame;
 112             var expected = (tween.currentFrame * tween.duration * 1000 / tween.totalFrames);
 113             var elapsed = (new Date() - tween.getStartTime());
 114             var tweak = 0;
 115
 116             if (elapsed < tween.duration * 1000) {
 117                 tweak = Math.round((elapsed / expected - 1) * tween.currentFrame);
 118             } else {
 119                 tweak = frames - (frame + 1);
 120             }
 121             if (tweak > 0 && isFinite(tweak)) {
 122                 if (tween.currentFrame + tweak >= frames) {
 123                     tweak = frames - (frame + 1);
 124                 }
 125
 126                 tween.currentFrame += tweak;
 127             }
 128         };
 129     };