platforma/static/js/wiki/view_gallery.js

   1 (function($){
   2
   3     function normalizeNumber(pageNumber, pageCount){
   4         // Numer strony musi być pomiędzy 1 a najwyższym numerem
   5         var pageNumber = parseInt(pageNumber, 10);
   6
   7         if (!pageNumber ||
   8         pageNumber == NaN ||
   9         pageNumber == Infinity ||
  10         pageNumber == -Infinity ||
  11         pageNumber < 1)
  12             return 1;
  13
  14         if (pageNumber > pageCount)
  15             return pageCount;
  16
  17         return pageNumber;
  18     }
  19
  20     function bounds(galleryWidth, galleryHeight, imageWidth, imageHeight){
  21         return {
  22             maxX: 0,
  23             maxY: 0,
  24             minX: galleryWidth - imageWidth,
  25             minY: galleryHeight - imageHeight
  26         }
  27     };
  28
  29     function normalizePosition(x, y, galleryWidth, galleryHeight, imageWidth, imageHeight){
  30         var b = bounds(galleryWidth, galleryHeight, imageWidth, imageHeight);
  31         return {
  32             x: Math.min(b.maxX, Math.max(b.minX, x)),
  33             y: Math.min(b.maxY, Math.max(b.minY, y))
  34         }
  35     };
  36
  37     function fixImageSize(){
  38
  39     }
  40
  41     /*
  42      * Perspective
  43      */
  44     function ScanGalleryPerspective(options){
  45         var old_callback = options.callback || function() { };
  46
  47                 this.noupdate_hash_onenter = true;
  48
  49         options.callback = function(){
  50             var self = this;
  51
  52             this.dimensions = {};
  53             this.zoomFactor = 1;
  54             this.$element = $("#side-gallery");
  55             this.$numberInput = $('.page-number', this.$element);
  56
  57             // ...
  58             var origin = {};
  59             var imageOrigin = {};
  60
  61             this.$image = $('.gallery-image img', this.$element).attr('unselectable', 'on');
  62
  63             // button handlers
  64             this.$numberInput.change(function(event){
  65                 event.preventDefault();
  66                 self.setPage($(this).val());
  67             });
  68
  69             $('.previous-page', this.$element).click(function(){
  70                 self.setPage(parseInt(self.$numberInput.val(),10) - 1);
  71             });
  72
  73             $('.next-page', this.$element).click(function(){
  74                 self.setPage(parseInt(self.$numberInput.val(),10) + 1);
  75             });
  76
  77             $('.zoom-in', this.$element).click(function(){
  78                 self.alterZoom(0.2);
  79             });
  80
  81             $('.zoom-out', this.$element).click(function(){
  82                 self.alterZoom((-0.2));
  83             });
  84
  85             $(window).resize(function(){
  86                 self.dimensions.galleryWidth = self.$image.parent().width();
  87                 self.dimensions.galleryHeight = self.$image.parent().height();
  88             });
  89
  90             $('.gallery-image img', this.$element).load(function(){
  91                 console.log("Image loaded.")
  92                 self._resizeImage();
  93             }).bind('mousedown', function() {
  94                                 self.imageMoveStart.apply(self, arguments);
  95                         });
  96
  97
  98
  99                         old_callback.call(this);
 100         };
 101
 102         $.wiki.Perspective.call(this, options);
 103     };
 104
 105     ScanGalleryPerspective.prototype = new $.wiki.Perspective();
 106
 107     ScanGalleryPerspective.prototype._resizeImage = function(){
 108         var $img = this.$image;
 109
 110         $img.css({
 111             width: null,
 112             height: null
 113         });
 114
 115         this.dimensions = {
 116             width: $img.width() * this.zoomFactor,
 117             height: $img.height() * this.zoomFactor,
 118             originWidth: $img.width(),
 119             originHeight: $img.height(),
 120                     galleryWidth: $img.parent().width(),
 121             galleryHeight: $img.parent().height()
 122         };
 123
 124         if (!(this.dimensions.width && this.dimensions.height)) {
 125             setTimeout(function(){
 126                 $img.load();
 127             }, 100);
 128         }
 129
 130         var position = normalizePosition($img.position().left, $img.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 131
 132         $img.css({
 133             left: position.x,
 134             top: position.y,
 135             width: $img.width() * this.zoomFactor,
 136             height: $img.height() * this.zoomFactor
 137         });
 138     };
 139
 140     ScanGalleryPerspective.prototype.setPage = function(newPage){
 141         newPage = normalizeNumber(newPage, this.doc.galleryImages.length);
 142         this.$numberInput.val(newPage);
 143                 this.config().page = newPage;
 144         $('.gallery-image img', this.$element).attr('src', this.doc.galleryImages[newPage - 1]);
 145     };
 146
 147     ScanGalleryPerspective.prototype.alterZoom = function(delta){
 148         var zoomFactor = this.zoomFactor + delta;
 149         if (zoomFactor < 0.2)
 150             zoomFactor = 0.2;
 151         if (zoomFactor > 2)
 152             zoomFactor = 2;
 153         this.setZoom(zoomFactor);
 154     };
 155
 156     ScanGalleryPerspective.prototype.setZoom = function(factor){
 157         this.zoomFactor = factor;
 158
 159         this.dimensions.width = this.dimensions.originWidth * this.zoomFactor;
 160         this.dimensions.height = this.dimensions.originHeight * this.zoomFactor;
 161
 162         // var position = normalizePosition(this.$image.position().left, this.$image.position().top, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 163
 164                 this._resizeImage();
 165         /* this.$image.css({
 166             width: this.dimensions.width,
 167             height: this.dimensions.height,
 168             left: position.x,
 169             top: position.y
 170         });*/
 171     };
 172
 173         /*
 174          * Movement
 175          */
 176         ScanGalleryPerspective.prototype.imageMoved = function(event){
 177                 event.preventDefault();
 178
 179                 // origin is where the drag started
 180                 // imageOrigin is where the drag started on the image
 181
 182                 var newX = event.clientX - this.origin.x + this.imageOrigin.left;
 183                 var newY = event.clientY - this.origin.y + this.imageOrigin.top;
 184
 185                 var position = normalizePosition(newX, newY, this.dimensions.galleryWidth, this.dimensions.galleryHeight, this.dimensions.width, this.dimensions.height);
 186
 187                 this.$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         $.wiki.Perspective.prototype.onEnter.call(this);
 226
 227         this.doc.refreshGallery({
 228             success: function(doc, data){
 229                 self.$image.show();
 230                                 console.log("gconfig:", self.config().page );
 231                                 self.setPage( self.config().page );
 232
 233                 $('.error_message', self.$element).hide();
 234                 if(success) success();
 235             },
 236             failure: function(doc, message){
 237                 self.$image.hide();
 238                 $('.error_message', self.$element).show().html(message);
 239                 if(failure) failure();
 240             }
 241         });
 242
 243     };
 244
 245         ScanGalleryPerspective.prototype.onExit = function(success, failure) {
 246
 247         };
 248
 249     $.wiki.ScanGalleryPerspective = ScanGalleryPerspective;
 250
 251 })(jQuery);