中间件编程

开发平台：
JavaScript

ImageDv.js：源码内容
							/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
Imgorg.ImageDv = Ext.extend(Ext.DataView,{
    tpl: new Ext.XTemplate(
        '<tpl for=".">',
        '<div class="thumb-wrap" id="{id}">',
        '<div class="thumb"><img src="images/thumbs/{filename}" class="thumb-img"></div>',
        '<span class="x-editable">{filename:ellipsis(15)}</span></div>',
        '</tpl>'
    ),
    
    initComponent: function() {
        Ext.apply(this, {
            itemSelector: 'div.thumb-wrap',
            style: 'overflow:auto',
            multiSelect: true,
            overClass: 'x-view-over',
            emptyText: 'No images to display',
            plugins: [new Ext.DataView.DragSelector({
                dragSafe: true
            }), new Ext.DataView.LabelEditor({
                allowBlank: false,
                alignment: 'c-c',
                dataIndex: 'filename'
            })],
            store: new Ext.data.DirectStore({
                directFn: Imgorg.ss.Images.load,
                root: '',
                fields: ['filename', 'url', 'id', 'size']
            })
        });
        
        this.addEvents('viewitem');
        Imgorg.ImageDv.superclass.initComponent.call(this);
        this.on({// hacks to force the labeleditor to stop editing when we get a click elsewhere
            click: function() {
                this.plugins[1].completeEdit();
            },
            containerclick: function(dv, e) {
                this.plugins[1].completeEdit();
            },
            contextmenu: this.onContextMenu,
            containercontextmenu: this.onContextMenu,
            scope: this
        });
        this.store.on('update', this.syncRename, this);
    },
    
    afterRender: function() {
        Imgorg.ImageDv.superclass.afterRender.call(this);
        this.el.unselectable(); // messy if they can select the text of the file names
    },
    
    onContextMenu: function(e, node) {
        e.stopEvent();
        if(!this.contMenu) {
            this.contMenu = new Ext.menu.Menu({
                items: [{
                    text: 'View in Tab(s)',
                    handler: function() {
                        this.fireEvent('viewitem', this, node);
                    },
                    scope: this
                },{
                    text: 'Add to Album',
                    handler: this.selectAlbum,
                    scope: this
                },{
                    text: 'Tag',
                    handler: this.tag,
                    scope: this
                },{
                    text: 'Remove',
                    handler: this.removeImages,
                    scope: this
                }]
            });
        }
        this.currentNode = node;
        this.contMenu.showAt(e.getXY());
    },
    
    selectAlbum: function() {
        if (!this.albumWin) {
            this.albumWin = new Imgorg.AlbumWin();
        }
        this.albumWin.selectedRecords = this.getSelectedRecords();
        this.albumWin.show(this.currentNode);
    },
    
    tag: function() {
        Imgorg.TagWin.selectedRecords = this.getSelectedRecords();
        Imgorg.TagWin.show(this.currentNode);
    },
    
    syncRename: function(store, rec, op) {
        if (op == 'edit') {
            Imgorg.ss.Images.rename({image: rec.data.id, name: rec.data.filename, url: rec.data.url});
        }
    },
    
    removeImages: function() {
        var recs = this.getSelectedRecords();
        var imageIds = [];
        for (var i = 0;i < recs.length;i++) {
            imageIds.push(recs[i].data.id);
            this.store.remove(recs[i]);
        }
        Imgorg.ss.Images.remove({images: imageIds});
    }
});
Ext.reg('img-dv', Imgorg.ImageDv);

						