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  <pre class="prettyprint lang-js"><span id='Ext-grid-RowNumberer'>/**
</span> * This is a utility class that can be passed into a {@link Ext.grid.column.Column} as a column config that provides
 * an automatic row numbering column.
 * 
 * Usage:
 *
 *     columns: [
 *         {xtype: 'rownumberer'},
 *         {text: &quot;Company&quot;, flex: 1, sortable: true, dataIndex: 'company'},
 *         {text: &quot;Price&quot;, width: 120, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
 *         {text: &quot;Change&quot;, width: 120, sortable: true, dataIndex: 'change'},
 *         {text: &quot;% Change&quot;, width: 120, sortable: true, dataIndex: 'pctChange'},
 *         {text: &quot;Last Updated&quot;, width: 120, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
 *     ]
 *
 */
Ext.define('Ext.grid.RowNumberer', {
    extend: 'Ext.grid.column.Column',
    alias: 'widget.rownumberer',

<span id='Ext-grid-RowNumberer-cfg-text'>    /**
</span>     * @cfg {String} text
     * Any valid text or HTML fragment to display in the header cell for the row number column.
     */
    text: &quot;&amp;#160&quot;,

<span id='Ext-grid-RowNumberer-cfg-width'>    /**
</span>     * @cfg {Number} width
     * The default width in pixels of the row number column.
     */
    width: 23,

<span id='Ext-grid-RowNumberer-cfg-sortable'>    /**
</span>     * @cfg {Boolean} sortable
     * @hide
     */
    sortable: false,
    
<span id='Ext-grid-RowNumberer-cfg-draggable'>    /**
</span>     * @cfg {Boolean} [draggable=false]
     * False to disable drag-drop reordering of this column.
     */
    draggable: false,

    align: 'right',

    constructor : function(config){

        // Copy the prototype's default width setting into an instance property to provide
        // a default width which will not be overridden by AbstractContainer.applyDefaults use of Ext.applyIf
        this.width = this.width;

        this.callParent(arguments);
        if (this.rowspan) {
            this.renderer = Ext.Function.bind(this.renderer, this);
        }
    },

    // private
    resizable: false,
    hideable: false,
    menuDisabled: true,
    dataIndex: '',
    cls: Ext.baseCSSPrefix + 'row-numberer',
    rowspan: undefined,

    // private
    renderer: function(value, metaData, record, rowIdx, colIdx, store) {
        if (this.rowspan){
            metaData.cellAttr = 'rowspan=&quot;'+this.rowspan+'&quot;';
        }

        metaData.tdCls = Ext.baseCSSPrefix + 'grid-cell-special';
        return store.indexOfTotal(record) + 1;
    }
});
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