groupingview.js

一个struts和extjs得源码

/*
 * Ext JS Library 2.2.1
 * Copyright(c) 2006-2009, Ext JS, LLC.
 * [e-mail]
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.grid.GroupingView
 * @extends Ext.grid.GridView
 * Adds the ability for single level grouping to the grid.
 *<pre><code>var grid = new Ext.grid.GridPanel({
    // A groupingStore is required for a GroupingView
    store: new Ext.data.GroupingStore({
        reader: reader,
        data: xg.dummyData,
        sortInfo:{field: 'company', direction: "ASC"},
        groupField:'industry'
    }),

    columns: [
        {id:'company',header: "Company", width: 60, sortable: true, dataIndex: 'company'},
        {header: "Price", width: 20, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
        {header: "Change", width: 20, sortable: true, dataIndex: 'change', renderer: Ext.util.Format.usMoney},
        {header: "Industry", width: 20, sortable: true, dataIndex: 'industry'},
        {header: "Last Updated", width: 20, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
    ],

    view: new Ext.grid.GroupingView({
        forceFit:true,
        // custom grouping text template to display the number of items per group
        groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Items" : "Item"]})'
    }),

    frame:true,
    width: 700,
    height: 450,
    collapsible: true,
    animCollapse: false,
    title: 'Grouping Example',
    iconCls: 'icon-grid',
    renderTo: document.body
});</code></pre>
 * @constructor
 * @param {Object} config
 */
Ext.grid.GroupingView = Ext.extend(Ext.grid.GridView, {
    /**
     * @cfg {Boolean} hideGroupedColumn True to hide the column that is currently grouped
     */
    hideGroupedColumn:false,
    /**
     * @cfg {Boolean} showGroupName True to display the name for each set of grouped rows (defaults to true)
     */
    showGroupName:true,
    /**
     * @cfg {Boolean} startCollapsed True to start all groups collapsed
     */
    startCollapsed:false,
    /**
     * @cfg {Boolean} enableGrouping False to disable grouping functionality (defaults to true)
     */
    enableGrouping:true,
    /**
     * @cfg {Boolean} enableGroupingMenu True to enable the grouping control in the column menu
     */
    enableGroupingMenu:true,
    /**
     * @cfg {Boolean} enableNoGroups True to allow the user to turn off grouping
     */
    enableNoGroups:true,
    /**
     * @cfg {String} emptyGroupText The text to display when there is an empty group value
     */
    emptyGroupText : '(None)',
    /**
     * @cfg {Boolean} ignoreAdd True to skip refreshing the view when new rows are added (defaults to false)
     */
    ignoreAdd: false,
    /**
     * @cfg {String} groupTextTpl The template used to render the group header. This is used to
     * format an object which contains the following properties:
     * <div class="mdetail-params"><ul>
     * <li><b>group</b> : String<p class="sub-desc">The <i>rendered</i> value of the group field.
     * By default this is the unchanged value of the group field. If a {@link #groupRenderer}
     * is specified, it is the result of a call to that.</p></li>
     * <li><b>gvalue</b> : Object<p class="sub-desc">The <i>raw</i> value of the group field.</p></li>
     * <li><b>text</b> : String<p class="sub-desc">The configured {@link #header} (If
     * {@link #showGroupName} is true) plus the <i>rendered</i>group field value.</p></li>
     * <li><b>groupId</b> : String<p class="sub-desc">A unique, generated ID which is applied to the
     * View Element which contains the group.</p></li>
     * <li><b>startRow</b> : Number<p class="sub-desc">The row index of the Record which caused group change.</p></li>
     * <li><b>rs</b> : Array<p class="sub-desc">.Contains a single element: The Record providing the data
     * for the row which caused group change.</p></li>
     * <li><b>cls</b> : String<p class="sub-desc">The generated class name string to apply to the group header Element.</p></li>
     * <li><b>style</b> : String<p class="sub-desc">The inline style rules to apply to the group header Element.</p></li>
     * </ul></div></p>
     * See {@link Ext.XTemplate} for information on how to format data using a template.
     */
    groupTextTpl : '{text}',
    /**
     * @cfg {Function} groupRenderer The function used to format the grouping field value for
     * display in the group header. Should return a string value. This takes the following parameters:
     * <div class="mdetail-params"><ul>
     * <li><b>v</b> : Object<p class="sub-desc">The new value of the group field.</p></li>
     * <li><b>unused</b> : undefined<p class="sub-desc">Unused parameter.</p></li>
     * <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data
     * for the row which caused group change.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">The row index of the Record which caused group change.</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">The column index of the group field.</p></li>
     * <li><b>ds</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></p>
     */
    /**
     * @cfg {String} header The text with which to prefix the group field value in the group header line.
     */

    // private
    gidSeed : 1000,

    // private
    initTemplates : function(){
        Ext.grid.GroupingView.superclass.initTemplates.call(this);
        this.state = {};

        var sm = this.grid.getSelectionModel();
        sm.on(sm.selectRow ? 'beforerowselect' : 'beforecellselect',
                this.onBeforeRowSelect, this);

        if(!this.startGroup){
            this.startGroup = new Ext.XTemplate(
                '<div id="{groupId}" class="x-grid-group {cls}">',
                    '<div id="{groupId}-hd" class="x-grid-group-hd" style="{style}"><div>', this.groupTextTpl ,'</div></div>',
                    '<div id="{groupId}-bd" class="x-grid-group-body">'
            );
        }
        this.startGroup.compile();
        this.endGroup = '</div></div>';
    },

    // private
    findGroup : function(el){
        return Ext.fly(el).up('.x-grid-group', this.mainBody.dom);
    },

    // private
    getGroups : function(){
        return this.hasRows() ? this.mainBody.dom.childNodes : [];
    },

    // private
    onAdd : function(){
        if(this.enableGrouping && !this.ignoreAdd){
            var ss = this.getScrollState();
            this.refresh();
            this.restoreScroll(ss);
        }else if(!this.enableGrouping){
            Ext.grid.GroupingView.superclass.onAdd.apply(this, arguments);
        }
    },

    // private
    onRemove : function(ds, record, index, isUpdate){
        Ext.grid.GroupingView.superclass.onRemove.apply(this, arguments);
        var g = document.getElementById(record._groupId);
        if(g && g.childNodes[1].childNodes.length < 1){
            Ext.removeNode(g);
        }
        this.applyEmptyText();
    },

    // private
    refreshRow : function(record){
        if(this.ds.getCount()==1){
            this.refresh();
        }else{
            this.isUpdating = true;
            Ext.grid.GroupingView.superclass.refreshRow.apply(this, arguments);
            this.isUpdating = false;
        }
    },

    // private
    beforeMenuShow : function(){
        var field = this.getGroupField();
        var g = this.hmenu.items.get('groupBy');
        if(g){
            g.setDisabled(this.cm.config[this.hdCtxIndex].groupable === false);
        }
        var s = this.hmenu.items.get('showGroups');
        if(s){
           s.setDisabled(!field && this.cm.config[this.hdCtxIndex].groupable === false);
			s.setChecked(!!field, true);
        }
    },

    // private
    renderUI : function(){
        Ext.grid.GroupingView.superclass.renderUI.call(this);
        this.mainBody.on('mousedown', this.interceptMouse, this);

        if(this.enableGroupingMenu && this.hmenu){
            this.hmenu.add('-',{
                id:'groupBy',
                text: this.groupByText,
                handler: this.onGroupByClick,
                scope: this,
                iconCls:'x-group-by-icon'
            });
            if(this.enableNoGroups){
                this.hmenu.add({
                    id:'showGroups',
                    text: this.showGroupsText,
                    checked: true,
                    checkHandler: this.onShowGroupsClick,
                    scope: this
                });
            }
            this.hmenu.on('beforeshow', this.beforeMenuShow, this);
        }
    },

    // private
    onGroupByClick : function(){
        this.grid.store.groupBy(this.cm.getDataIndex(this.hdCtxIndex));
        this.beforeMenuShow(); // Make sure the checkboxes get properly set when changing groups
    },

    // private
    onShowGroupsClick : function(mi, checked){
        if(checked){
            this.onGroupByClick();
        }else{
            this.grid.store.clearGrouping();
        }
    },

    /**
     * Toggles the specified group if no value is passed, otherwise sets the expanded state of the group to the value passed.
     * @param {String} groupId The groupId assigned to the group (see getGroupId)
     * @param {Boolean} expanded (optional)
     */
    toggleGroup : function(group, expanded){
        this.grid.stopEditing(true);
        group = Ext.getDom(group);