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     this.caption = Roo.get(this.caption);
  36     if ( this.autostart ) {
  37         this.startSlideShow();
  38     }
  39 }
  40
  41 Roo.apply(Roo.ux.Slideshow.prototype, {
  42
  43     wait                        : 4000
  44         start                   : 0
  45         duration                : 0.5,
  46         autostart               : true ,
  47         slides              : false,
  48     /**
  49      * @config id/dom element counter to show the
  50      */
  51         counter             : false,
  52      /**
  53      * @config id/dom element of the caption.
  54      */
  55         caption             : false,
  56      /**
  57      * @config id/dom element for play button
  58      */
  59         playButton              : false,
  60     /**
  61      * @config id/dom element of the pause button
  62      */
  63         pauseButton         : false,
  64         iImageId                : 0,
  65
  66
  67         // The Fade Function
  68         swapImage: function (x,y) {
  69         if (this.slides[x] ) {
  70             this.slides[x].animate(
  71                 { opacity : { from : 0.0, to : 1.0 }},
  72                 this.duration
  73             );
  74             this.slides[x].show();
  75         }
  76         if (this.slides[y] ) {
  77             this.slides[y].animate(
  78                 { opacity : { from : 1.0, to : 0.0 }},
  79                 this.duration
  80             );
  81             this.slides[y].show();
  82         }
  83
  84         },
  85
  86         // the onload event handler that starts the fading.
  87         startSlideShow: function () {
  88         var _t  = this;
  89         this.running = true;
  90                 this.playButton && this.playButton.hide();
  91                 this.pauseButton && this.pauseButton.show();
  92
  93                 this.updatecounter();
  94                 this.play();
  95         },
  96
  97         play: function () {
  98
  99                 var imageShow, imageHide;
 100
 101                 imageShow = this.iImageId+1;
 102                 imageHide = this.iImageId;
 103
 104                 if (imageShow == this.numOfImages) {
 105                         this.swapImage(0,imageHide);
 106
 107                         this.iImageId = 0;
 108                 } else {
 109                         this.swapImage(imageShow,imageHide);
 110                         this.iImageId++;
 111                 }
 112
 113                 this.textIn = this.iImageId+1 + ' of ' + this.numOfImages;
 114                 this.updatecounter();
 115         if (this.running) {
 116             this.play.defer(this.wait, this);
 117         }
 118
 119         },
 120
 121         stop: function  () {
 122                 this.running = false;
 123                 this.playButton && this.playButton.appear({ duration: 0});
 124                 this.pauseButton && this.pauseButton.hide();
 125         },
 126
 127         goNext: 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 (imageShow == this.numOfImages) {
 138                         this.swapImage(0,imageHide);
 139                         this.iImageId = 0;
 140                 } else {
 141                         this.swapImage(imageShow,imageHide);
 142                         this.iImageId++;
 143                 }
 144
 145                 this.updatecounter();
 146         },
 147
 148         goPrevious: function () {
 149                 clearInterval(this.play);
 150                 $(this.playButton).appear({ duration: 0});
 151                 $(this.pauseButton).hide();
 152
 153                 var imageShow, imageHide;
 154
 155                 imageShow = this.iImageId-1;
 156                 imageHide = this.iImageId;
 157
 158                 if (this.iImageId == 0) {
 159                         this.swapImage(this.numOfImages-1,imageHide);
 160                         this.iImageId = this.numOfImages-1;
 161
 162                         //alert(NumOfImages-1 + ' and ' + imageHide + ' i=' + i)
 163
 164                 } else {
 165                         this.swapImage(imageShow,imageHide);
 166                         this.iImageId--;
 167
 168                         //alert(imageShow + ' and ' + imageHide)
 169                 }
 170
 171                 this.updatecounter();
 172         },
 173
 174         updatecounter: function () {
 175         if (!this.counter) {
 176             return;
 177         }
 178                 var textIn = this.iImageId+1 + ' of ' + this.numOfImages;
 179                 this.counter.update( textIn );
 180         var oNewCaption = this.slides[this.iImageId]).select('.image-caption', true)
 181                 if ( this.caption &&  oNewCaption.length ) {
 182                         this.caption.update( oNewCaption[0].innerHTML;
 183                 }
 184         }
 185 }
 186
 187