redakcja/static/js/wiki/view_gallery.js

   1 (function($){
   2
   3     function normalizeNumber(pageNumber, pageCount){
   4         // Page number should be >= 1, <= pageCount; 0 if pageCount = 0
   5         var pageNumber = parseInt(pageNumber, 10);
   6
   7         if (!pageCount)
   8             return 0;
   9
  10         if (!pageNumber ||
  11                 isNaN(pageNumber) ||
  12                 pageNumber == Infinity ||
  13                 pageNumber == -Infinity ||
  14                 pageNumber < 1)
  15             return 1;
  16
  17         if (pageNumber > pageCount)
  18             return pageCount;
  19
  20         return pageNumber;
  21     }
  22
  23     function bounds(galleryWidth, galleryHeight, imageWidth, imageHeight){
  24         return {
  25             maxX: 0,
  26             maxY: 0,
  27             minX: galleryWidth - imageWidth,
  28             minY: galleryHeight - imageHeight
  29         }
  30     };
  31
  32     function normalizePosition(x, y, galleryWidth, galleryHeight, imageWidth, imageHeight){
  33         var b = bounds(galleryWidth, galleryHeight, imageWidth, imageHeight);
  34         return {
  35             x: Math.min(b.maxX, Math.max(b.minX, x)),
  36             y: Math.min(b.maxY, Math.max(b.minY, y))
  37         }
  38     };
  39
  40     function fixImageSize(){
  41
  42     }
  43
  44     /*
  45      * Perspective
  46      */
  47     function ScanGalleryPerspective(options){
  48         var old_callback = options.callback || function() { };
  49
  50                 this.noupdate_hash_onenter = true;
  51         this.vsplitbar = 'GALERIA';
  52
  53         options.callback = function(){
  54             var self = this;
  55
  56             this.dimensions = {};
  57             this.zoomFactor = 1;
  58             if (this.config().page == undefined)
  59                 this.config().page = CurrentDocument.galleryStart;
  60             this.$element = $("#side-gallery");
  61             this.$numberInput = $('.page-number', this.$element);
  62
  63             // ...
  64             var origin = {};
  65             var imageOrigin = {};
  66
  67             this.$image = $('.gallery-image img', this.$element).attr('unselectable', 'on');
  68
  69             // button handlers
  70             this.$numberInput.change(function(event){
  71                 event.preventDefault();
  72                 self.setPage($(this).val());
  73             });
  74
  75             $('.previous-page', this.$element).click(function(){
  76                 self.setPage(parseInt(self.$numberInput.val(),10) - 1);
  77             });
  78
  79             $('.next-page', this.$element).click(function(){
  80                 self.setPage(parseInt(self.$numberInput.val(),10) + 1);
  81             });
  82
  83             $('.zoom-in', this.$element).click(function(){
  84                 self.alterZoom(0.2);
  85             });
  86
  87             $('.zoom-out', this.$element).click(function(){
  88                 self.alterZoom((-0.2));
  89             });
  90
  91             $(window).resize(function(){
  92                 self.dimensions.galleryWidth = self.$image.parent().width();
  93                 self.dimensions.galleryHeight = self.$image.parent().height();
  94             });
  95
  96             this.$image.load(function(){
  97                 console.log("Image loaded.")
  98                 self._resizeImage();
  99             }).bind('mousedown', function() {
 100                                 self.imageMoveStart.apply(self, arguments);
 101                         });
 102
 103
 104
 105                         old_callback.call(this);
 106         };
 107
 108         $.wiki.Perspective.call(this, options);
 109     };
 110
 111     ScanGalleryPerspective.prototype = new $.wiki.Perspective();
 112
 113     ScanGalleryPerspective.prototype._resizeImage = function(){
 114         var $img = this.$image;
 115
 116         $img.css({
 117             width: '',
 118             height: ''
 119         });
 120
 121         this.dimensions = {
 122             width: $img.width() * this.zoomFactor,
 123             height: $img.height() * this.zoomFactor,
 124             originWidth: $img.width(),
 125             originHeight: $img.height(),
 126                     galleryWidth: $img.parent().width(),
 127             galleryHeight: $img.parent().height()
 128         };
 129
 130         if (!(this.dimensions.width && this.dimensions.height)) {
 131             setTimeout(function(){
 132                 $img.load();
 133             }, 100);
 134         }
 135
 136         var position = normalizePosition($img.position().left, $img.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 137
 138         $img.css({
 139             left: position.x,
 140             top: position.y,
 141             width: $img.width() * this.zoomFactor,
 142             height: $img.height() * this.zoomFactor
 143         });
 144     };
 145
 146     ScanGalleryPerspective.prototype.setPage = function(newPage){
 147         newPage = normalizeNumber(newPage, this.doc.galleryImages.length);
 148         this.$numberInput.val(newPage);
 149                 this.config().page = newPage;
 150         $('.gallery-image img', this.$element).attr('src', this.doc.galleryImages[newPage - 1]);
 151     };
 152
 153     ScanGalleryPerspective.prototype.alterZoom = function(delta){
 154         var zoomFactor = this.zoomFactor + delta;
 155         if (zoomFactor < 0.2)
 156             zoomFactor = 0.2;
 157         if (zoomFactor > 2)
 158             zoomFactor = 2;
 159         this.setZoom(zoomFactor);
 160     };
 161
 162     ScanGalleryPerspective.prototype.setZoom = function(factor){
 163         this.zoomFactor = factor;
 164
 165         this.dimensions.width = this.dimensions.originWidth * this.zoomFactor;
 166         this.dimensions.height = this.dimensions.originHeight * this.zoomFactor;
 167
 168         // var position = normalizePosition(this.$image.position().left, this.$image.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 169
 170                 this._resizeImage();
 171     };
 172
 173         /*
 174          * Movement
 175          */
 176         ScanGalleryPerspective.prototype.imageMoved = function(event){
 177                 event.preventDefault();
 178
 179                 // origin is where the drag started
 180                 // imageOrigin is where the drag started on the image
 181
 182                 var newX = event.clientX - this.origin.x + this.imageOrigin.left;
 183                 var newY = event.clientY - this.origin.y + this.imageOrigin.top;
 184
 185                 var position = normalizePosition(newX, newY, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 186
 187                 this.$image.css({
 188                         left: position.x,
 189                         top: position.y,
 190                 });
 191
 192                 return false;
 193         };
 194
 195         ScanGalleryPerspective.prototype.imageMoveStart = function(event){
 196                 event.preventDefault();
 197
 198                 var self = this;
 199
 200                 this.origin = {
 201                         x: event.clientX,
 202                         y: event.clientY
 203                 };
 204
 205                 this.imageOrigin = self.$image.position();
 206                 $(document).bind('mousemove.gallery', function(){
 207                         self.imageMoved.apply(self, arguments);
 208                 }).bind('mouseup.gallery', function() {
 209                         self.imageMoveStop.apply(self, arguments);
 210                 });
 211
 212                 return false;
 213         };
 214
 215         ScanGalleryPerspective.prototype.imageMoveStop = function(event){
 216                 $(document).unbind('mousemove.gallery').unbind('mouseup.gallery');
 217         };
 218
 219     /*
 220      * Loading gallery
 221      */
 222     ScanGalleryPerspective.prototype.onEnter = function(success, failure){
 223         var self = this;
 224
 225         $.wiki.Perspective.prototype.onEnter.call(this);
 226
 227         $('.vsplitbar').not('.active').trigger('click');
 228         $(".vsplitbar-title").html("&darr;&nbsp;GALERIA&nbsp;&darr;");
 229
 230         this.doc.refreshGallery({
 231             success: function(doc, data){
 232                 self.$image.show();
 233                                 console.log("gconfig:", self.config().page );
 234                                 self.setPage( self.config().page );
 235                 $('#imagesCount').html("/" + doc.galleryImages.length);
 236
 237                 $('.error_message', self.$element).hide();
 238                 if(success) success();
 239             },
 240             failure: function(doc, message){
 241                 self.$image.hide();
 242                 $('.error_message', self.$element).show().html(message);
 243                 if(failure) failure();
 244             }
 245         });
 246
 247     };
 248
 249         ScanGalleryPerspective.prototype.onExit = function(success, failure) {
 250
 251         };
 252
 253     $.wiki.ScanGalleryPerspective = ScanGalleryPerspective;
 254
 255 })(jQuery);