examples/view/chooser.js

   1 /*!
   2  * Ext JS Library 3.2.2
   3  * Copyright(c) 2006-2010 Ext JS, Inc.
   4  * licensing@extjs.com
   5  * http://www.extjs.com/license
   6  */
   7 var ImageChooser = function(config){
   8         this.config = config;
   9 }
  10
  11 ImageChooser.prototype = {
  12     // cache data by image name for easy lookup
  13     lookup : {},
  14
  15         show : function(el, callback){
  16                 if(!this.win){
  17                         this.initTemplates();
  18
  19                         this.store = new Ext.data.JsonStore({
  20                             url: this.config.url,
  21                             root: 'images',
  22                             fields: [
  23                                 'name', 'url',
  24                                 {name:'size', type: 'float'},
  25                                 {name:'lastmod', type:'date', dateFormat:'timestamp'}
  26                             ],
  27                             listeners: {
  28                                 'load': {fn:function(){ this.view.select(0); }, scope:this, single:true}
  29                             }
  30                         });
  31                         this.store.load();
  32
  33                         var formatSize = function(data){
  34                         if(data.size < 1024) {
  35                             return data.size + " bytes";
  36                         } else {
  37                             return (Math.round(((data.size*10) / 1024))/10) + " KB";
  38                         }
  39                     };
  40
  41                         var formatData = function(data){
  42                         data.shortName = data.name.ellipse(15);
  43                         data.sizeString = formatSize(data);
  44                         data.dateString = new Date(data.lastmod).format("m/d/Y g:i a");
  45                         this.lookup[data.name] = data;
  46                         return data;
  47                     };
  48
  49                     this.view = new Ext.DataView({
  50                                 tpl: this.thumbTemplate,
  51                                 singleSelect: true,
  52                                 overClass:'x-view-over',
  53                                 itemSelector: 'div.thumb-wrap',
  54                                 emptyText : '<div style="padding:10px;">No images match the specified filter</div>',
  55                                 store: this.store,
  56                                 listeners: {
  57                                         'selectionchange': {fn:this.showDetails, scope:this, buffer:100},
  58                                         'dblclick'       : {fn:this.doCallback, scope:this},
  59                                         'loadexception'  : {fn:this.onLoadException, scope:this},
  60                                         'beforeselect'   : {fn:function(view){
  61                                         return view.store.getRange().length > 0;
  62                                     }}
  63                                 },
  64                                 prepareData: formatData.createDelegate(this)
  65                         });
  66
  67                         var cfg = {
  68                         title: 'Choose an Image',
  69                         id: 'img-chooser-dlg',
  70                         layout: 'border',
  71                                 minWidth: 500,
  72                                 minHeight: 300,
  73                                 modal: true,
  74                                 closeAction: 'hide',
  75                                 border: false,
  76                                 items:[{
  77                                         id: 'img-chooser-view',
  78                                         region: 'center',
  79                                         autoScroll: true,
  80                                         items: this.view,
  81                     tbar:[{
  82                         text: 'Filter:'
  83                     },{
  84                         xtype: 'textfield',
  85                         id: 'filter',
  86                         selectOnFocus: true,
  87                         width: 100,
  88                         listeners: {
  89                                 'render': {fn:function(){
  90                                                         Ext.getCmp('filter').getEl().on('keyup', function(){
  91                                                                 this.filter();
  92                                                         }, this, {buffer:500});
  93                                 }, scope:this}
  94                         }
  95                     }, ' ', '-', {
  96                         text: 'Sort By:'
  97                     }, {
  98                         id: 'sortSelect',
  99                         xtype: 'combo',
 100                                         typeAhead: true,
 101                                         triggerAction: 'all',
 102                                         width: 100,
 103                                         editable: false,
 104                                         mode: 'local',
 105                                         displayField: 'desc',
 106                                         valueField: 'name',
 107                                         lazyInit: false,
 108                                         value: 'name',
 109                                         store: new Ext.data.ArrayStore({
 110                                                 fields: ['name', 'desc'],
 111                                                 data : [['name', 'Name'],['size', 'File Size'],['lastmod', 'Last Modified']]
 112                                             }),
 113                                             listeners: {
 114                                                         'select': {fn:this.sortImages, scope:this}
 115                                             }
 116                                     }]
 117                                 },{
 118                                         id: 'img-detail-panel',
 119                                         region: 'east',
 120                                         split: true,
 121                                         width: 150,
 122                                         minWidth: 150,
 123                                         maxWidth: 250
 124                                 }],
 125                                 buttons: [{
 126                                         id: 'ok-btn',
 127                                         text: 'OK',
 128                                         handler: this.doCallback,
 129                                         scope: this
 130                                 },{
 131                                         text: 'Cancel',
 132                                         handler: function(){ this.win.hide(); },
 133                                         scope: this
 134                                 }],
 135                                 keys: {
 136                                         key: 27, // Esc key
 137                                         handler: function(){ this.win.hide(); },
 138                                         scope: this
 139                                 }
 140                         };
 141                         Ext.apply(cfg, this.config);
 142                     this.win = new Ext.Window(cfg);
 143                 }
 144
 145                 this.reset();
 146             this.win.show(el);
 147                 this.callback = callback;
 148                 this.animateTarget = el;
 149         },
 150
 151         initTemplates : function(){
 152                 this.thumbTemplate = new Ext.XTemplate(
 153                         '<tpl for=".">',
 154                                 '<div class="thumb-wrap" id="{name}">',
 155                                 '<div class="thumb"><img src="{url}" title="{name}"></div>',
 156                                 '<span>{shortName}</span></div>',
 157                         '</tpl>'
 158                 );
 159                 this.thumbTemplate.compile();
 160
 161                 this.detailsTemplate = new Ext.XTemplate(
 162                         '<div class="details">',
 163                                 '<tpl for=".">',
 164                                         '<img src="{url}"><div class="details-info">',
 165                                         '<b>Image Name:</b>',
 166                                         '<span>{name}</span>',
 167                                         '<b>Size:</b>',
 168                                         '<span>{sizeString}</span>',
 169                                         '<b>Last Modified:</b>',
 170                                         '<span>{dateString}</span></div>',
 171                                 '</tpl>',
 172                         '</div>'
 173                 );
 174                 this.detailsTemplate.compile();
 175         },
 176
 177         showDetails : function(){
 178             var selNode = this.view.getSelectedNodes();
 179             var detailEl = Ext.getCmp('img-detail-panel').body;
 180                 if(selNode && selNode.length > 0){
 181                         selNode = selNode[0];
 182                         Ext.getCmp('ok-btn').enable();
 183                     var data = this.lookup[selNode.id];
 184             detailEl.hide();
 185             this.detailsTemplate.overwrite(detailEl, data);
 186             detailEl.slideIn('l', {stopFx:true,duration:.2});
 187                 }else{
 188                     Ext.getCmp('ok-btn').disable();
 189                     detailEl.update('');
 190                 }
 191         },
 192
 193         filter : function(){
 194                 var filter = Ext.getCmp('filter');
 195                 this.view.store.filter('name', filter.getValue());
 196                 this.view.select(0);
 197         },
 198
 199         sortImages : function(){
 200                 var v = Ext.getCmp('sortSelect').getValue();
 201         this.view.store.sort(v, v == 'name' ? 'asc' : 'desc');
 202         this.view.select(0);
 203     },
 204
 205         reset : function(){
 206                 if(this.win.rendered){
 207                         Ext.getCmp('filter').reset();
 208                         this.view.getEl().dom.scrollTop = 0;
 209                 }
 210             this.view.store.clearFilter();
 211                 this.view.select(0);
 212         },
 213
 214         doCallback : function(){
 215         var selNode = this.view.getSelectedNodes()[0];
 216                 var callback = this.callback;
 217                 var lookup = this.lookup;
 218                 this.win.hide(this.animateTarget, function(){
 219             if(selNode && callback){
 220                                 var data = lookup[selNode.id];
 221                                 callback(data);
 222                         }
 223                 });
 224     },
 225
 226         onLoadException : function(v,o){
 227             this.view.getEl().update('<div style="padding:10px;">Error loading images.</div>');
 228         }
 229 };
 230
 231 String.prototype.ellipse = function(maxLength){
 232     if(this.length > maxLength){
 233         return this.substr(0, maxLength-3) + '...';
 234     }
 235     return this;
 236 };