groupingview.js

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/*
 * Ext JS Library 3.0 Pre-alpha
 * Copyright(c) 2006-2008, 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. A {@link Ext.data.GroupingStore GroupingStore}
 * must be used to enable grouping.  Some grouping characteristics may also be configured at the
 * {@link Ext.grid.Column Column level} (<code>{@link Ext.grid.Column#groupable groupable}</code>,
 * <code>{@link Ext.grid.Column#groupName groupName}</code>, and
 * <code>{@link Ext.grid.Column#groupRender groupRender}</code>).  
 * <pre><code>
var grid = new Ext.grid.GridPanel({
    // A groupingStore is required for a GroupingView
    store: new {@link Ext.data.GroupingStore}({
        autoDestroy: true,
        reader: reader,
        data: xg.dummyData,
        sortInfo: {field: 'company', direction: "ASC"},
        {@link Ext.data.GroupingStore#groupOnSort groupOnSort}: true,
        {@link Ext.data.GroupingStore#remoteGroup remoteGroup}: true,
        {@link Ext.data.GroupingStore#groupField groupField}: 'industry'
    }),
    colModel: new {@link Ext.grid.ColumnModel}({
        columns:[
            {id:'company',header: "Company", width: 60, dataIndex: 'company'},
            // {@link Ext.grid.Column#groupable groupable}, {@link Ext.grid.Column#groupName groupName}, {@link Ext.grid.Column#groupRender groupRender} are also configurable at column level
            {header: "Price", renderer: Ext.util.Format.usMoney, dataIndex: 'price', {@link Ext.grid.Column#groupable groupable}: false},
            {header: "Change", dataIndex: 'change', renderer: Ext.util.Format.usMoney},
            {header: "Industry", dataIndex: 'industry'},
            {header: "Last Updated", renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
        ],
        defaults: {
            sortable: true,
            menuDisabled: false,
            width: 20
        }
    }),

    view: new Ext.grid.GroupingView({
        {@link Ext.grid.GridView#forceFit forceFit}: true,
        // custom grouping text template to display the number of items per group
        {@link #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 <tt>true</tt> to hide the column that is currently grouped (defaults to <tt>false</tt>)
     */
    hideGroupedColumn:false,
    /**
     * @cfg {Boolean} showGroupName If <tt>true</tt> will display a prefix plus a ': ' before the group field value
     * in the group header line.  The prefix will consist of the <tt><b>{@link Ext.grid.Column#groupName groupName}</b></tt>
     * (or the configured <tt><b>{@link Ext.grid.Column#header header}</b></tt> if not provided) configured in the
     * {@link Ext.grid.Column} for each set of grouped rows (defaults to <tt>true</tt>).
     */
    showGroupName:true,
    /**
     * @cfg {Boolean} startCollapsed <tt>true</tt> to start all groups collapsed (defaults to <tt>false</tt>)
     */
    startCollapsed:false,
    /**
     * @cfg {Boolean} enableGrouping <tt>false</tt> to disable grouping functionality (defaults to <tt>true</tt>)
     */
    enableGrouping:true,
    /**
     * @cfg {Boolean} enableGroupingMenu <tt>true</tt> to enable the grouping control in the column menu (defaults to <tt>true</tt>)
     */
    enableGroupingMenu:true,
    /**
     * @cfg {Boolean} enableNoGroups <tt>true</tt> to allow the user to turn off grouping (defaults to <tt>true</tt>)
     */
    enableNoGroups:true,
    /**
     * @cfg {String} emptyGroupText The text to display when there is an empty group value (defaults to <tt>'(None)'</tt>)
     */
    emptyGroupText : '(None)',
    /**
     * @cfg {Boolean} ignoreAdd <tt>true</tt> to skip refreshing the view when new rows are added (defaults to <tt>false</tt>)
     */
    ignoreAdd: false,
    /**
     * @cfg {String} groupTextTpl The template used to render the group header (defaults to <tt>'{text}'</tt>).
     * 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 <tt><b>{@link Ext.grid.Column#groupRenderer groupRenderer}</b></tt>
     * is specified, it is the result of a call to that function.</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 header (as described in <tt>{@link #showGroupName})</tt>
     * if <tt>{@link #showGroupName}</tt> is <tt>true</tt>) 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. Possible usage:<pre><code>
var grid = new Ext.grid.GridPanel({
    ...
    view: new Ext.grid.GroupingView({
        groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Items" : "Item"]})'
    }),
});
     * </code></pre>
     */
    groupTextTpl : '{text}',
    /**
     * @cfg {Function} groupRenderer This property must be configured in the {@link Ext.grid.Column} for
     * each column.
     */

    // 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('-',{
                itemId:'groupBy',
                text: this.groupByText,
                handler: this.onGroupByClick,
                scope: this,
                iconCls:'x-group-by-icon'
            });
            if(this.enableNoGroups){
                this.hmenu.add({
                    itemId:'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)
     */