git.roojs.org Git - roojs1/blob - ux/Slideshow.js

   1 //<script type="text/javascript">
   2 /**
   3  * Slideshow  - based on a prototype one..
   4  *
   5  *
   6  * usage:
   7  *
   8 Roo.onReady( function()
   9 {
  10    // use a dom selector to define slides..
  11     var slides = Roo.DomQuery.select('.category-slide');
  12
  13     oMySlides = new Roo.ux.Slideshow({
  14         slides          : slides,
  15     });
  16
  17 });
  18  *
  19  *
  20  * @class Roo.ux.Slideshow
  21  */
  22
  23 Roo.ux.Slideshow = function(cfg )
  24 {
  25     Roo.apply(this, cfg);
  26     if ( this.slides ) {
  27         this.numOfImages        = this.slides.length;
  28         if ( !this.numOfImages ) {
  29             alert('No slides?');
  30         }
  31     }
  32     this.playButton = Roo.get(this.playButton);
  33     this.pauseButton = Roo.get(this.pauseButton);
  34     this.counter = Roo.get(this.counter);
  35     if ( this.autostart ) {
  36         this.startSlideShow();
  37     }
  38 }
  39
  40 Roo.apply(Roo.ux.Slideshow.prototype, {
  41
  42     wait                        : 4000
  43         start                   : 0
  44         duration                : 0.5,
  45         autostart               : true ,
  46         slides              : false,
  47     /**
  48      * @config id/dom element counter to show the
  49      */
  50         counter             : false,
  51         caption             : '',
  52      /**
  53      * @config id/dom element for play button
  54      */
  55         playButton              : false,
  56     /**
  57      * @config id/dom element of the pause button
  58      */
  59         pauseButton         : false,
  60         iImageId                : 0,
  61
  62
  63         // The Fade Function
  64         swapImage: function (x,y) {
  65                 $(this.slides[x]) && $(this.slides[x]).appear({ duration: this.duration });
  66                 $(this.slides[y]) && $(this.slides[y]).fade({duration: this.duration });
  67         },
  68
  69         // the onload event handler that starts the fading.
  70         startSlideShow: function () {
  71         var _t  = this;
  72                 window.setInterval(function () {
  73             _t.play() },this.wait);
  74                 this.playButton && this.playButton.hide();
  75                 this.pauseButton && this.pauseButton.appear({ duration: 0});
  76
  77                 this.updatecounter();
  78
  79         },
  80
  81         play: function () {
  82
  83                 var imageShow, imageHide;
  84
  85                 imageShow = this.iImageId+1;
  86                 imageHide = this.iImageId;
  87
  88                 if (imageShow == this.numOfImages) {
  89                         this.swapImage(0,imageHide);
  90                         this.iImageId = 0;
  91                 } else {
  92                         this.swapImage(imageShow,imageHide);
  93                         this.iImageId++;
  94                 }
  95
  96                 this.textIn = this.iImageId+1 + ' of ' + this.numOfImages;
  97                 this.updatecounter();
  98         },
  99
 100         stop: function  () {
 101                 clearInterval(this.play);
 102                 this.playButton && this.playButton.appear({ duration: 0});
 103                 this.pauseButton && this.pauseButton.hide();
 104         },
 105
 106         goNext: function () {
 107                 clearInterval(this.play);
 108                 $(this.playButton).appear({ duration: 0});
 109                 $(this.pauseButton).hide();
 110
 111                 var imageShow, imageHide;
 112
 113                 imageShow = this.iImageId+1;
 114                 imageHide = this.iImageId;
 115
 116                 if (imageShow == this.numOfImages) {
 117                         this.swapImage(0,imageHide);
 118                         this.iImageId = 0;
 119                 } else {
 120                         this.swapImage(imageShow,imageHide);
 121                         this.iImageId++;
 122                 }
 123
 124                 this.updatecounter();
 125         },
 126
 127         goPrevious: function () {
 128                 clearInterval(this.play);
 129                 $(this.playButton).appear({ duration: 0});
 130                 $(this.pauseButton).hide();
 131
 132                 var imageShow, imageHide;
 133
 134                 imageShow = this.iImageId-1;
 135                 imageHide = this.iImageId;
 136
 137                 if (this.iImageId == 0) {
 138                         this.swapImage(this.numOfImages-1,imageHide);
 139                         this.iImageId = this.numOfImages-1;
 140
 141                         //alert(NumOfImages-1 + ' and ' + imageHide + ' i=' + i)
 142
 143                 } else {
 144                         this.swapImage(imageShow,imageHide);
 145                         this.iImageId--;
 146
 147                         //alert(imageShow + ' and ' + imageHide)
 148                 }
 149
 150                 this.updatecounter();
 151         },
 152
 153         updatecounter: function () {
 154
 155                 var textIn = this.iImageId+1 + ' of ' + this.numOfImages;
 156                 $(this.counter) && ( $(this.counter).innerHTML = textIn );
 157                 if ( $(this.caption) && ( oNewCaption = $(this.slides[this.iImageId]).down('.image-caption') ) ) {
 158                         $(this.caption).innerHTML = oNewCaption.innerHTML;
 159                 }
 160         }
 161 }
 162
 163