1 /*global View render_template panels */
2 var ImageGalleryView = View.extend({
3 _className: 'ImageGalleryView',
8 template: 'image-gallery-view-template',
10 init: function(element, model, parent, template)
12 console.log("init for gallery");
13 this._super(element, model, template);
17 .addObserver(this, 'data', this.modelDataChanged.bind(this))
18 .addObserver(this, 'state', this.modelStateChanged.bind(this));
20 //$('.image-gallery-view', this.element).html(this.model.get('data'));
21 this.modelStateChanged('state', this.model.get('state'));
25 modelDataChanged: function(property, value)
27 if( property == 'data')
30 this.gotoPage(this.currentPage);
34 gotoPage: function(index)
39 var n = this.$pages.length;
40 if (index >= n) index = n-1;
42 if( (this.currentPage == index) )
45 var cpage = this.$currentPage();
48 var offset = this.pageViewOffset(cpage);
49 this.cleanPage(cpage);
52 this.currentPage = index;
54 cpage = this.$currentPage()
55 this.renderImage(cpage);
58 cpage.css({top: offset.y, left: offset.x});
62 $('img', cpage).bind('load', function() {
64 self.setPageViewOffset(cpage, offset);
69 if(this.currentPage == n-1)
70 this.$nextButton.attr('disabled', 'disabled');
72 this.$nextButton.removeAttr('disabled');
74 if(this.currentPage == 0)
75 this.$prevButton.attr('disabled', 'disabled');
77 this.$prevButton.removeAttr('disabled');
79 this.$pageInput.val( (this.currentPage+1) );
82 reload: function() {},
84 modelStateChanged: function(property, value) {
85 if (value == 'loading') {
86 this.parent.freeze('Ładowanie...');
88 this.parent.unfreeze();
92 $currentPage: function() {
93 if(this.currentPage >= 0 && this.currentPage < this.$pages.length)
94 return $(this.$pages[this.currentPage]);
99 cleanPage: function($page) {
101 $('img', $page).unbind();
105 this.setPageViewOffset($page, {x:0, y:0});
108 pageDragStart: function(event)
110 this.dragStart = {x: event.clientX, y: event.clientY};
111 $(window).bind('mousemove.imagedrag', this.pageDrag.bind(this));
112 $(window).bind('mouseup.imagedrag', this.pageDragStop.bind(this));
114 this.$currentPage().css('cursor', 'move');
119 pageDrag: function(event)
121 if(!this.dragStart) return;
124 x: this.dragStart.x - event.clientX,
125 y: this.dragStart.y - event.clientY };
127 var offset = this.pageViewOffset( $(this.$pages[this.currentPage]) );
130 this.setPageViewOffset( $(this.$pages[this.currentPage]), offset);
132 this.dragStart = {x: event.clientX, y: event.clientY };
136 pageDragStop: function(event) {
137 this.$currentPage().css('cursor', 'auto');
139 this.dragStart = undefined;
140 $(window).unbind('mousemove.imagedrag');
141 $(window).unbind('mouseup.imagedrag');
146 pageViewOffset: function($page) {
147 var left = parseInt($page.css('left'));
148 var top = parseInt($page.css('top'));
150 return {x: left, y: top};
153 setPageViewOffset: function($page, offset) {
154 // check if the image will be actually visible
159 var vp_width = this.$pageListRoot.width();
160 var vp_height = this.$pageListRoot.height();
162 var width = $page.outerWidth();
163 var height = $page.outerHeight();
165 // console.log(offset, vp_width, vp_height, width, height);
166 if( offset.x+width-MARGIN < 0 ) {
167 // console.log('too much on the left', offset.x, -width)
168 offset.x = -width+MARGIN;
171 // too much on the right
172 if( offset.x > vp_width-MARGIN) {
173 offset.x = vp_width-MARGIN;
174 // console.log('too much on the right', offset.x, vp_width, width)
177 if( offset.y+height-MARGIN < 0)
178 offset.y = -height+MARGIN;
180 if( offset.y > vp_height-MARGIN)
181 offset.y = vp_height-MARGIN;
183 $page.css({left: offset.x, top: offset.y});
186 renderImage: function(target)
188 var source = target.attr('ui:model');
189 var orig_width = parseInt(target.attr('ui:width'));
190 var orig_height = parseInt(target.attr('ui:height'));
192 target.html('<img src="' + source
193 + '" width="' + Math.floor(orig_width * this.pageZoom)
194 + '" height="' + Math.floor(orig_height * this.pageZoom)
199 'user-select': 'none',
200 '-webkit-user-select': 'none',
201 '-khtml-user-select': 'none',
202 '-moz-user-select': 'none'
204 attr('unselectable', 'on').
205 mousedown(this.pageDragStart.bind(this));
210 console.log('rendering:', this._className);
212 /* first unbind all */
213 if(this.$nextButton) this.$nextButton.unbind();
214 if(this.$prevButton) this.$prevButton.unbind();
215 if(this.$jumpButton) this.$jumpButton.unbind();
216 if(this.$pageInput) this.$pageInput.unbind();
218 if(this.$zoomInButton) this.$zoomInButton.unbind();
219 if(this.$zoomOutButton) this.$zoomOutButton.unbind();
220 if(this.$zoomResetButton) this.$zoomResetButton.unbind();
223 this.element.html(render_template(this.template, this));
225 /* fetch important parts */
226 this.$pageListRoot = $('.image-gallery-page-list', this.element);
227 this.$pages = $('.image-gallery-page-container', this.$pageListRoot);
229 this.$nextButton = $('.image-gallery-next-button', this.element);
230 this.$prevButton = $('.image-gallery-prev-button', this.element);
231 this.$pageInput = $('.image-gallery-current-page', this.element);
233 // this.$zoomSelect = $('.image-gallery-current-zoom', this.element);
234 this.$zoomInButton = $('.image-gallery-zoom-in', this.element);
235 this.$zoomOutButton = $('.image-gallery-zoom-out', this.element);
236 this.$zoomResetButton = $('.image-gallery-zoom-reset', this.element);
239 this.$nextButton.click( this.nextPage.bind(this) );
240 this.$prevButton.click( this.prevPage.bind(this) );
241 this.$pageInput.change( this.jumpToPage.bind(this) );
243 // this.$zoomSelect.change( this.zoomChanged.bind(this) );
244 this.$zoomInButton.click( this.zoomInOneStep.bind(this) );
245 this.$zoomOutButton.click( this.zoomOutOneStep.bind(this) );
246 this.$zoomResetButton.click( this.zoomReset.bind(this) );
248 this.gotoPage(this.currentPage);
249 this.changePageZoom(this.pageZoom);
252 jumpToPage: function() {
253 this.gotoPage(parseInt(this.$pageInput.val())-1);
256 nextPage: function() {
257 this.gotoPage(this.currentPage + 1);
260 prevPage: function() {
261 this.gotoPage(this.currentPage - 1);
264 zoomReset: function() {
265 this.changePageZoom(1.0);
268 zoomInOneStep: function() {
269 var zoom = this.pageZoom + 0.1;
270 if(zoom > 3.0) zoom = 3.0;
271 this.changePageZoom(zoom);
274 zoomOutOneStep: function() {
275 var zoom = this.pageZoom - 0.1;
276 if(zoom < 0.3) zoom = 0.3;
277 this.changePageZoom(zoom);
280 changePageZoom: function(value) {
281 var current = this.$currentPage();
285 var alpha = value/this.pageZoom;
286 this.pageZoom = value;
288 var nwidth = current.attr('ui:width') * this.pageZoom;
289 var nheight = current.attr('ui:height') * this.pageZoom;
290 var off_top = parseInt(current.css('top'));
291 var off_left = parseInt(current.css('left'));
293 var vpx = this.$pageListRoot.width() * 0.5;
294 var vpy = this.$pageListRoot.height() * 0.5;
296 var new_off_left = vpx - alpha*(vpx-off_left);
297 var new_off_top = vpy - alpha*(vpy-off_top);
299 $('img', current).attr('width', nwidth);
300 $('img', current).attr('height', nheight);
302 this.setPageViewOffset(current, {
303 y: new_off_top, x: new_off_left
306 // this.$zoomSelect.val(this.pageZoom);
307 // console.log('Zoom is now', this.pageZoom);
312 console.log("Disposing gallery.");
313 this.model.removeObserver(this);
319 panels['gallery'] = ImageGalleryView;