docs/source/ext-base-anim.html

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   4   <title>The source code</title>
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   9     <pre class="prettyprint lang-js">/*!
  10  * Ext JS Library 3.3.1
  11  * Copyright(c) 2006-2010 Sencha Inc.
  12  * licensing@sencha.com
  13  * http://www.sencha.com/license
  14  */
  15 (function(){
  16     var EXTLIB = Ext.lib,
  17         noNegatives = /width|height|opacity|padding/i,
  18         offsetAttribute = /^((width|height)|(top|left))$/,
  19         defaultUnit = /width|height|top$|bottom$|left$|right$/i,
  20         offsetUnit =  /\d+(em|%|en|ex|pt|in|cm|mm|pc)$/i,
  21         isset = function(v){
  22             return typeof v !== 'undefined';
  23         },
  24         now = function(){
  25             return new Date();
  26         };
  27
  28     EXTLIB.Anim = {
  29         motion : function(el, args, duration, easing, cb, scope) {
  30             return this.run(el, args, duration, easing, cb, scope, Ext.lib.Motion);
  31         },
  32
  33         run : function(el, args, duration, easing, cb, scope, type) {
  34             type = type || Ext.lib.AnimBase;
  35             if (typeof easing == "string") {
  36                 easing = Ext.lib.Easing[easing];
  37             }
  38             var anim = new type(el, args, duration, easing);
  39             anim.animateX(function() {
  40                 if(Ext.isFunction(cb)){
  41                     cb.call(scope);
  42                 }
  43             });
  44             return anim;
  45         }
  46     };
  47
  48     EXTLIB.AnimBase = function(el, attributes, duration, method) {
  49         if (el) {
  50             this.init(el, attributes, duration, method);
  51         }
  52     };
  53
  54     EXTLIB.AnimBase.prototype = {
  55         doMethod: function(attr, start, end) {
  56             var me = this;
  57             return me.method(me.curFrame, start, end - start, me.totalFrames);
  58         },
  59
  60
  61         setAttr: function(attr, val, unit) {
  62             if (noNegatives.test(attr) && val < 0) {
  63                 val = 0;
  64             }
  65             Ext.fly(this.el, '_anim').setStyle(attr, val + unit);
  66         },
  67
  68
  69         getAttr: function(attr) {
  70             var el = Ext.fly(this.el),
  71                 val = el.getStyle(attr),
  72                 a = offsetAttribute.exec(attr) || [];
  73
  74             if (val !== 'auto' && !offsetUnit.test(val)) {
  75                 return parseFloat(val);
  76             }
  77
  78             return (!!(a[2]) || (el.getStyle('position') == 'absolute' && !!(a[3]))) ? el.dom['offset' + a[0].charAt(0).toUpperCase() + a[0].substr(1)] : 0;
  79         },
  80
  81
  82         getDefaultUnit: function(attr) {
  83             return defaultUnit.test(attr) ? 'px' : '';
  84         },
  85
  86         animateX : function(callback, scope) {
  87             var me = this,
  88                 f = function() {
  89                 me.onComplete.removeListener(f);
  90                 if (Ext.isFunction(callback)) {
  91                     callback.call(scope || me, me);
  92                 }
  93             };
  94             me.onComplete.addListener(f, me);
  95             me.animate();
  96         },
  97
  98
  99         setRunAttr: function(attr) {
 100             var me = this,
 101                 a = this.attributes[attr],
 102                 to = a.to,
 103                 by = a.by,
 104                 from = a.from,
 105                 unit = a.unit,
 106                 ra = (this.runAttrs[attr] = {}),
 107                 end;
 108
 109             if (!isset(to) && !isset(by)){
 110                 return false;
 111             }
 112
 113             var start = isset(from) ? from : me.getAttr(attr);
 114             if (isset(to)) {
 115                 end = to;
 116             }else if(isset(by)) {
 117                 if (Ext.isArray(start)){
 118                     end = [];
 119                     for(var i=0,len=start.length; i<len; i++) {
 120                         end[i] = start[i] + by[i];
 121                     }
 122                 }else{
 123                     end = start + by;
 124                 }
 125             }
 126
 127             Ext.apply(ra, {
 128                 start: start,
 129                 end: end,
 130                 unit: isset(unit) ? unit : me.getDefaultUnit(attr)
 131             });
 132         },
 133
 134
 135         init: function(el, attributes, duration, method) {
 136             var me = this,
 137                 actualFrames = 0,
 138                 mgr = EXTLIB.AnimMgr;
 139
 140             Ext.apply(me, {
 141                 isAnimated: false,
 142                 startTime: null,
 143                 el: Ext.getDom(el),
 144                 attributes: attributes || {},
 145                 duration: duration || 1,
 146                 method: method || EXTLIB.Easing.easeNone,
 147                 useSec: true,
 148                 curFrame: 0,
 149                 totalFrames: mgr.fps,
 150                 runAttrs: {},
 151                 animate: function(){
 152                     var me = this,
 153                         d = me.duration;
 154
 155                     if(me.isAnimated){
 156                         return false;
 157                     }
 158
 159                     me.curFrame = 0;
 160                     me.totalFrames = me.useSec ? Math.ceil(mgr.fps * d) : d;
 161                     mgr.registerElement(me);
 162                 },
 163
 164                 stop: function(finish){
 165                     var me = this;
 166
 167                     if(finish){
 168                         me.curFrame = me.totalFrames;
 169                         me._onTween.fire();
 170                     }
 171                     mgr.stop(me);
 172                 }
 173             });
 174
 175             var onStart = function(){
 176                 var me = this,
 177                     attr;
 178
 179                 me.onStart.fire();
 180                 me.runAttrs = {};
 181                 for(attr in this.attributes){
 182                     this.setRunAttr(attr);
 183                 }
 184
 185                 me.isAnimated = true;
 186                 me.startTime = now();
 187                 actualFrames = 0;
 188             };
 189
 190
 191             var onTween = function(){
 192                 var me = this;
 193
 194                 me.onTween.fire({
 195                     duration: now() - me.startTime,
 196                     curFrame: me.curFrame
 197                 });
 198
 199                 var ra = me.runAttrs;
 200                 for (var attr in ra) {
 201                     this.setAttr(attr, me.doMethod(attr, ra[attr].start, ra[attr].end), ra[attr].unit);
 202                 }
 203
 204                 ++actualFrames;
 205             };
 206
 207             var onComplete = function() {
 208                 var me = this,
 209                     actual = (now() - me.startTime) / 1000,
 210                     data = {
 211                         duration: actual,
 212                         frames: actualFrames,
 213                         fps: actualFrames / actual
 214                     };
 215
 216                 me.isAnimated = false;
 217                 actualFrames = 0;
 218                 me.onComplete.fire(data);
 219             };
 220
 221             me.onStart = new Ext.util.Event(me);
 222             me.onTween = new Ext.util.Event(me);
 223             me.onComplete = new Ext.util.Event(me);
 224             (me._onStart = new Ext.util.Event(me)).addListener(onStart);
 225             (me._onTween = new Ext.util.Event(me)).addListener(onTween);
 226             (me._onComplete = new Ext.util.Event(me)).addListener(onComplete);
 227         }
 228     };
 229
 230
 231     Ext.lib.AnimMgr = new function() {
 232         var me = this,
 233             thread = null,
 234             queue = [],
 235             tweenCount = 0;
 236
 237
 238         Ext.apply(me, {
 239             fps: 1000,
 240             delay: 1,
 241             registerElement: function(tween){
 242                 queue.push(tween);
 243                 ++tweenCount;
 244                 tween._onStart.fire();
 245                 me.start();
 246             },
 247
 248             unRegister: function(tween, index){
 249                 tween._onComplete.fire();
 250                 index = index || getIndex(tween);
 251                 if (index != -1) {
 252                     queue.splice(index, 1);
 253                 }
 254
 255                 if (--tweenCount <= 0) {
 256                     me.stop();
 257                 }
 258             },
 259
 260             start: function(){
 261                 if(thread === null){
 262                     thread = setInterval(me.run, me.delay);
 263                 }
 264             },
 265
 266             stop: function(tween){
 267                 if(!tween){
 268                     clearInterval(thread);
 269                     for(var i = 0, len = queue.length; i < len; ++i){
 270                         if(queue[0].isAnimated){
 271                             me.unRegister(queue[0], 0);
 272                         }
 273                     }
 274
 275                     queue = [];
 276                     thread = null;
 277                     tweenCount = 0;
 278                 }else{
 279                     me.unRegister(tween);
 280                 }
 281             },
 282
 283             run: function(){
 284                 var tf, i, len, tween;
 285                 for(i = 0, len = queue.length; i<len; i++) {
 286                     tween = queue[i];
 287                     if(tween && tween.isAnimated){
 288                         tf = tween.totalFrames;
 289                         if(tween.curFrame < tf || tf === null){
 290                             ++tween.curFrame;
 291                             if(tween.useSec){
 292                                 correctFrame(tween);
 293                             }
 294                             tween._onTween.fire();
 295                         }else{
 296                             me.stop(tween);
 297                         }
 298                     }
 299                 }
 300             }
 301         });
 302
 303         var getIndex = function(anim) {
 304             var i, len;
 305             for(i = 0, len = queue.length; i<len; i++) {
 306                 if(queue[i] === anim) {
 307                     return i;
 308                 }
 309             }
 310             return -1;
 311         };
 312
 313         var correctFrame = function(tween) {
 314             var frames = tween.totalFrames,
 315                 frame = tween.curFrame,
 316                 duration = tween.duration,
 317                 expected = (frame * duration * 1000 / frames),
 318                 elapsed = (now() - tween.startTime),
 319                 tweak = 0;
 320
 321             if(elapsed < duration * 1000){
 322                 tweak = Math.round((elapsed / expected - 1) * frame);
 323             }else{
 324                 tweak = frames - (frame + 1);
 325             }
 326             if(tweak > 0 && isFinite(tweak)){
 327                 if(tween.curFrame + tweak >= frames){
 328                     tweak = frames - (frame + 1);
 329                 }
 330                 tween.curFrame += tweak;
 331             }
 332         };
 333     };
 334
 335     EXTLIB.Bezier = new function() {
 336
 337         this.getPosition = function(points, t) {
 338             var n = points.length,
 339                 tmp = [],
 340                 c = 1 - t,
 341                 i,
 342                 j;
 343
 344             for (i = 0; i < n; ++i) {
 345                 tmp[i] = [points[i][0], points[i][1]];
 346             }
 347
 348             for (j = 1; j < n; ++j) {
 349                 for (i = 0; i < n - j; ++i) {
 350                     tmp[i][0] = c * tmp[i][0] + t * tmp[parseInt(i + 1, 10)][0];
 351                     tmp[i][1] = c * tmp[i][1] + t * tmp[parseInt(i + 1, 10)][1];
 352                 }
 353             }
 354
 355             return [ tmp[0][0], tmp[0][1] ];
 356
 357         };
 358     };
 359
 360
 361     EXTLIB.Easing = {
 362         easeNone: function (t, b, c, d) {
 363             return c * t / d + b;
 364         },
 365
 366
 367         easeIn: function (t, b, c, d) {
 368             return c * (t /= d) * t + b;
 369         },
 370
 371
 372         easeOut: function (t, b, c, d) {
 373             return -c * (t /= d) * (t - 2) + b;
 374         }
 375     };
 376
 377     (function() {
 378         EXTLIB.Motion = function(el, attributes, duration, method) {
 379             if (el) {
 380                 EXTLIB.Motion.superclass.constructor.call(this, el, attributes, duration, method);
 381             }
 382         };
 383
 384         Ext.extend(EXTLIB.Motion, Ext.lib.AnimBase);
 385
 386         var superclass = EXTLIB.Motion.superclass,
 387             pointsRe = /^points$/i;
 388
 389         Ext.apply(EXTLIB.Motion.prototype, {
 390             setAttr: function(attr, val, unit){
 391                 var me = this,
 392                     setAttr = superclass.setAttr;
 393
 394                 if (pointsRe.test(attr)) {
 395                     unit = unit || 'px';
 396                     setAttr.call(me, 'left', val[0], unit);
 397                     setAttr.call(me, 'top', val[1], unit);
 398                 } else {
 399                     setAttr.call(me, attr, val, unit);
 400                 }
 401             },
 402
 403             getAttr: function(attr){
 404                 var me = this,
 405                     getAttr = superclass.getAttr;
 406
 407                 return pointsRe.test(attr) ? [getAttr.call(me, 'left'), getAttr.call(me, 'top')] : getAttr.call(me, attr);
 408             },
 409
 410             doMethod: function(attr, start, end){
 411                 var me = this;
 412
 413                 return pointsRe.test(attr)
 414                         ? EXTLIB.Bezier.getPosition(me.runAttrs[attr], me.method(me.curFrame, 0, 100, me.totalFrames) / 100)
 415                         : superclass.doMethod.call(me, attr, start, end);
 416             },
 417
 418             setRunAttr: function(attr){
 419                 if(pointsRe.test(attr)){
 420
 421                     var me = this,
 422                         el = this.el,
 423                         points = this.attributes.points,
 424                         control = points.control || [],
 425                         from = points.from,
 426                         to = points.to,
 427                         by = points.by,
 428                         DOM = EXTLIB.Dom,
 429                         start,
 430                         i,
 431                         end,
 432                         len,
 433                         ra;
 434
 435
 436                     if(control.length > 0 && !Ext.isArray(control[0])){
 437                         control = [control];
 438                     }else{
 439                         /*
 440                         var tmp = [];
 441                         for (i = 0,len = control.length; i < len; ++i) {
 442                             tmp[i] = control[i];
 443                         }
 444                         control = tmp;
 445                         */
 446                     }
 447
 448                     Ext.fly(el, '_anim').position();
 449                     DOM.setXY(el, isset(from) ? from : DOM.getXY(el));
 450                     start = me.getAttr('points');
 451
 452
 453                     if(isset(to)){
 454                         end = translateValues.call(me, to, start);
 455                         for (i = 0,len = control.length; i < len; ++i) {
 456                             control[i] = translateValues.call(me, control[i], start);
 457                         }
 458                     } else if (isset(by)) {
 459                         end = [start[0] + by[0], start[1] + by[1]];
 460
 461                         for (i = 0,len = control.length; i < len; ++i) {
 462                             control[i] = [ start[0] + control[i][0], start[1] + control[i][1] ];
 463                         }
 464                     }
 465
 466                     ra = this.runAttrs[attr] = [start];
 467                     if (control.length > 0) {
 468                         ra = ra.concat(control);
 469                     }
 470
 471                     ra[ra.length] = end;
 472                 }else{
 473                     superclass.setRunAttr.call(this, attr);
 474                 }
 475             }
 476         });
 477
 478         var translateValues = function(val, start) {
 479             var pageXY = EXTLIB.Dom.getXY(this.el);
 480             return [val[0] - pageXY[0] + start[0], val[1] - pageXY[1] + start[1]];
 481         };
 482     })();
 483 })();</pre>
 484 </body>
 485 </html>