docs/source/carousel.html

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   9     <pre class="prettyprint lang-js">/*!
  10  * Ext JS Library 3.2.1
  11  * Copyright(c) 2006-2010 Ext JS, Inc.
  12  * licensing@extjs.com
  13  * http://www.extjs.com/license
  14  */
  15 Ext.ns('Ext.ux');
  16
  17 Ext.ux.Carousel = Ext.extend(Ext.util.Observable, {
  18     interval: 3,
  19     transitionDuration: 1,
  20     transitionType: 'carousel',
  21     transitionEasing: 'easeOut',
  22     itemSelector: 'img',
  23     activeSlide: 0,
  24     autoPlay: false,
  25     showPlayButton: false,
  26     pauseOnNavigate: false,
  27     wrap: false,
  28     freezeOnHover: false,
  29     navigationOnHover: false,
  30     hideNavigation: false,
  31     width: null,
  32     height: null,
  33
  34     constructor: function(elId, config) {
  35         config = config || {};
  36         Ext.apply(this, config);
  37
  38         Ext.ux.Carousel.superclass.constructor.call(this, config);
  39
  40         this.addEvents(
  41             'beforeprev',
  42             'prev',
  43             'beforenext',
  44             'next',
  45             'change',
  46             'play',
  47             'pause',
  48             'freeze',
  49             'unfreeze'
  50         );
  51
  52         this.el = Ext.get(elId);
  53         this.slides = this.els = [];
  54
  55         if(this.autoPlay || this.showPlayButton) {
  56             this.wrap = true;
  57         };
  58
  59         if(this.autoPlay && typeof config.showPlayButton === 'undefined') {
  60             this.showPlayButton = true;
  61         }
  62
  63         this.initMarkup();
  64         this.initEvents();
  65
  66         if(this.carouselSize > 0) {
  67             this.refresh();
  68         }
  69     },
  70
  71     initMarkup: function() {
  72         var dh = Ext.DomHelper;
  73
  74         this.carouselSize = 0;
  75         var items = this.el.select(this.itemSelector);
  76         this.els.container = dh.append(this.el, {cls: 'ux-carousel-container'}, true);
  77         this.els.slidesWrap = dh.append(this.els.container, {cls: 'ux-carousel-slides-wrap'}, true);
  78
  79         this.els.navigation = dh.append(this.els.container, {cls: 'ux-carousel-nav'}, true).hide();
  80         this.els.caption = dh.append(this.els.navigation, {tag: 'h2', cls: 'ux-carousel-caption'}, true);
  81         this.els.navNext = dh.append(this.els.navigation, {tag: 'a', href: '#', cls: 'ux-carousel-nav-next'}, true);
  82         if(this.showPlayButton) {
  83             this.els.navPlay = dh.append(this.els.navigation, {tag: 'a', href: '#', cls: 'ux-carousel-nav-play'}, true)
  84         }
  85         this.els.navPrev = dh.append(this.els.navigation, {tag: 'a', href: '#', cls: 'ux-carousel-nav-prev'}, true);
  86
  87         // set the dimensions of the container
  88         this.slideWidth = this.width || this.el.getWidth(true);
  89         this.slideHeight = this.height || this.el.getHeight(true);
  90         this.els.container.setStyle({
  91             width: this.slideWidth + 'px',
  92             height: this.slideHeight + 'px'
  93         });
  94
  95         this.els.caption.setWidth((this.slideWidth - (this.els.navNext.getWidth()*2) - (this.showPlayButton ? this.els.navPlay.getWidth() : 0) - 20) + 'px')
  96
  97         items.appendTo(this.els.slidesWrap).each(function(item) {
  98             item = item.wrap({cls: 'ux-carousel-slide'});
  99             this.slides.push(item);
 100             item.setWidth(this.slideWidth + 'px').setHeight(this.slideHeight + 'px');
 101         }, this);
 102         this.carouselSize = this.slides.length;
 103         if(this.navigationOnHover) {
 104             this.els.navigation.setStyle('top', (-1*this.els.navigation.getHeight()) + 'px');
 105         }
 106         this.el.clip();
 107     },
 108
 109     initEvents: function() {
 110         this.els.navPrev.on('click', function(ev) {
 111             ev.preventDefault();
 112             var target = ev.getTarget();
 113             target.blur();
 114             if(Ext.fly(target).hasClass('ux-carousel-nav-disabled')) return;
 115             this.prev();
 116         }, this);
 117
 118         this.els.navNext.on('click', function(ev) {
 119             ev.preventDefault();
 120             var target = ev.getTarget();
 121             target.blur();
 122             if(Ext.fly(target).hasClass('ux-carousel-nav-disabled')) return;
 123             this.next();
 124         }, this);
 125
 126         if(this.showPlayButton) {
 127             this.els.navPlay.on('click', function(ev){
 128                 ev.preventDefault();
 129                 ev.getTarget().blur();
 130                 if(this.playing) {
 131                     this.pause();
 132                 }
 133                 else {
 134                     this.play();
 135                 }
 136             }, this);
 137         };
 138
 139         if(this.freezeOnHover) {
 140             this.els.container.on('mouseenter', function(){
 141                 if(this.playing) {
 142                     this.fireEvent('freeze', this.slides[this.activeSlide]);
 143                     Ext.TaskMgr.stop(this.playTask);
 144                 }
 145             }, this);
 146             this.els.container.on('mouseleave', function(){
 147                 if(this.playing) {
 148                     this.fireEvent('unfreeze', this.slides[this.activeSlide]);
 149                     Ext.TaskMgr.start(this.playTask);
 150                 }
 151             }, this, {buffer: (this.interval/2)*1000});
 152         };
 153
 154         if(this.navigationOnHover) {
 155             this.els.container.on('mouseenter', function(){
 156                 if(!this.navigationShown) {
 157                     this.navigationShown = true;
 158                     this.els.navigation.stopFx(false).shift({
 159                         y: this.els.container.getY(),
 160                         duration: this.transitionDuration
 161                     })
 162                 }
 163             }, this);
 164
 165             this.els.container.on('mouseleave', function(){
 166                 if(this.navigationShown) {
 167                     this.navigationShown = false;
 168                     this.els.navigation.stopFx(false).shift({
 169                         y: this.els.navigation.getHeight() - this.els.container.getY(),
 170                         duration: this.transitionDuration
 171                     })
 172                 }
 173             }, this);
 174         }
 175
 176         if(this.interval && this.autoPlay) {
 177             this.play();
 178         };
 179     },
 180
 181     prev: function() {
 182         if (this.fireEvent('beforeprev') === false) {
 183             return;
 184         }
 185         if(this.pauseOnNavigate) {
 186             this.pause();
 187         }
 188         this.setSlide(this.activeSlide - 1);
 189
 190         this.fireEvent('prev', this.activeSlide);
 191         return this;
 192     },
 193
 194     next: function() {
 195         if(this.fireEvent('beforenext') === false) {
 196             return;
 197         }
 198         if(this.pauseOnNavigate) {
 199             this.pause();
 200         }
 201         this.setSlide(this.activeSlide + 1);
 202
 203         this.fireEvent('next', this.activeSlide);
 204         return this;
 205     },
 206
 207     play: function() {
 208         if(!this.playing) {
 209             this.playTask = this.playTask || {
 210                 run: function() {
 211                     this.playing = true;
 212                     this.setSlide(this.activeSlide+1);
 213                 },
 214                 interval: this.interval*1000,
 215                 scope: this
 216             };
 217
 218             this.playTaskBuffer = this.playTaskBuffer || new Ext.util.DelayedTask(function() {
 219                 Ext.TaskMgr.start(this.playTask);
 220             }, this);
 221
 222             this.playTaskBuffer.delay(this.interval*1000);
 223             this.playing = true;
 224             if(this.showPlayButton) {
 225                 this.els.navPlay.addClass('ux-carousel-playing');
 226             }
 227             this.fireEvent('play');
 228         }
 229         return this;
 230     },
 231
 232     pause: function() {
 233         if(this.playing) {
 234             Ext.TaskMgr.stop(this.playTask);
 235             this.playTaskBuffer.cancel();
 236             this.playing = false;
 237             if(this.showPlayButton) {
 238                 this.els.navPlay.removeClass('ux-carousel-playing');
 239             }
 240             this.fireEvent('pause');
 241         }
 242         return this;
 243     },
 244
 245     clear: function() {
 246         this.els.slidesWrap.update('');
 247         this.slides = [];
 248         this.carouselSize = 0;
 249         this.pause();
 250         return this;
 251     },
 252
 253     add: function(el, refresh) {
 254         var item = Ext.fly(el).appendTo(this.els.slidesWrap).wrap({cls: 'ux-carousel-slide'});
 255         item.setWidth(this.slideWidth + 'px').setHeight(this.slideHeight + 'px');
 256         this.slides.push(item);
 257         if(refresh) {
 258             this.refresh();
 259         }
 260         return this;
 261     },
 262
 263     refresh: function() {
 264         this.carouselSize = this.slides.length;
 265         this.els.slidesWrap.setWidth((this.slideWidth * this.carouselSize) + 'px');
 266         if(this.carouselSize > 0) {
 267             if(!this.hideNavigation) this.els.navigation.show();
 268             this.activeSlide = 0;
 269             this.setSlide(0, true);
 270         }
 271         return this;
 272     },
 273
 274     setSlide: function(index, initial) {
 275         if(!this.wrap && !this.slides[index]) {
 276             return;
 277         }
 278         else if(this.wrap) {
 279             if(index < 0) {
 280                 index = this.carouselSize-1;
 281             }
 282             else if(index > this.carouselSize-1) {
 283                 index = 0;
 284             }
 285         }
 286         if(!this.slides[index]) {
 287             return;
 288         }
 289
 290         this.els.caption.update(this.slides[index].child(':first-child', true).title || '');
 291         var offset = index * this.slideWidth;
 292         if (!initial) {
 293             switch (this.transitionType) {
 294                 case 'fade':
 295                     this.slides[index].setOpacity(0);
 296                     this.slides[this.activeSlide].stopFx(false).fadeOut({
 297                         duration: this.transitionDuration / 2,
 298                         callback: function(){
 299                             this.els.slidesWrap.setStyle('left', (-1 * offset) + 'px');
 300                             this.slides[this.activeSlide].setOpacity(1);
 301                             this.slides[index].fadeIn({
 302                                 duration: this.transitionDuration / 2
 303                             });
 304                         },
 305                         scope: this
 306                     })
 307                     break;
 308
 309                 default:
 310                     var xNew = (-1 * offset) + this.els.container.getX();
 311                     this.els.slidesWrap.stopFx(false);
 312                     this.els.slidesWrap.shift({
 313                         duration: this.transitionDuration,
 314                         x: xNew,
 315                         easing: this.transitionEasing
 316                     });
 317                     break;
 318             }
 319         }
 320         else {
 321             this.els.slidesWrap.setStyle('left', '0');
 322         }
 323
 324         this.activeSlide = index;
 325         this.updateNav();
 326         this.fireEvent('change', this.slides[index], index);
 327     },
 328
 329     updateNav: function() {
 330         this.els.navPrev.removeClass('ux-carousel-nav-disabled');
 331         this.els.navNext.removeClass('ux-carousel-nav-disabled');
 332         if(!this.wrap) {
 333             if(this.activeSlide === 0) {
 334                 this.els.navPrev.addClass('ux-carousel-nav-disabled');
 335             }
 336             if(this.activeSlide === this.carouselSize-1) {
 337                 this.els.navNext.addClass('ux-carousel-nav-disabled');
 338             }
 339         }
 340     }
 341 });</pre>
 342 </body>
 343 </html>