text: /**
   * @class Ext4.ux.grid.filter.StringFilter
   * @extends Ext4.ux.grid.filter.Filter
   * Filter by a configurable Ext4.form.field.Text
   * <p><b><u>Example Usage:</u></b></p>
   * <pre><code>
  var filters = Ext4.create('Ext4.ux.grid.GridFilters', {
      ...
      filters: [{
          // required configs
          type: 'string',
          dataIndex: 'name',
  
          // optional configs
          value: 'foo',
          active: true, // default is false
          iconCls: 'ux-gridfilter-text-icon' // default
          // any Ext4.form.field.Text configs accepted
      }]
  });
   * </code></pre>
   */
  Ext4.define('Ext4.ux.grid.filter.StringFilter', {
      extend: 'Ext4.ux.grid.filter.Filter',
      alias: 'gridfilter.string',
  
      /**
       * @cfg {String} iconCls
       * The iconCls to be applied to the menu item.
       * Defaults to <tt>'ux-gridfilter-text-icon'</tt>.
       */
      iconCls : 'ux-gridfilter-text-icon',
  
      emptyText: 'Enter Filter Text...',
      selectOnFocus: true,
      width: 125,
  
      /**
       * @private
       * Template method that is to initialize the filter and install required menu items.
       */
      init : function (config) {
          Ext4.applyIf(config, {
              enableKeyEvents: true,
              iconCls: this.iconCls,
              hideLabel: true,
              listeners: {
                  scope: this,
                  keyup: this.onInputKeyUp,
                  el: {
                      click: function(e) {
                          e.stopPropagation();
                      }
                  }
              }
          });
  
          this.inputItem = Ext4.create('Ext4.form.field.Text', config);
          this.menu.add(this.inputItem);
          this.updateTask = Ext4.create('Ext4.util.DelayedTask', this.fireUpdate, this);
      },
  
      /**
       * @private
       * Template method that is to get and return the value of the filter.
       * @return {String} The value of this filter
       */
      getValue : function () {
          return this.inputItem.getValue();
      },
  
      /**
       * @private
       * Template method that is to set the value of the filter.
       * @param {Object} value The value to set the filter
       */
      setValue : function (value) {
          this.inputItem.setValue(value);
          this.fireEvent('update', this);
      },
  
      /**
       * @private
       * Template method that is to return <tt>true</tt> if the filter
       * has enough configuration information to be activated.
       * @return {Boolean}
       */
      isActivatable : function () {
          return this.inputItem.getValue().length > 0;
      },
  
      /**
       * @private
       * Template method that is to get and return serialized filter data for
       * transmission to the server.
       * @return {Object/Array} An object or collection of objects containing
       * key value pairs representing the current configuration of the filter.
       */
      getSerialArgs : function () {
          return {type: 'string', value: this.getValue()};
      },
  
      /**
       * Template method that is to validate the provided Ext4.data.Record
       * against the filters configuration.
       * @param {Ext4.data.Record} record The record to validate
       * @return {Boolean} true if the record is valid within the bounds
       * of the filter, false otherwise.
       */
      validateRecord : function (record) {
          var val = record.get(this.dataIndex);
  
          if(typeof val != 'string') {
              return (this.getValue().length === 0);
          }
  
          return val.toLowerCase().indexOf(this.getValue().toLowerCase()) > -1;
      },
  
      /**
       * @private
       * Handler method called when there is a keyup event on this.inputItem
       */
      onInputKeyUp : function (field, e) {
          var k = e.getKey();
          if (k == e.RETURN && field.isValid()) {
              e.stopEvent();
              this.menu.hide();
              return;
          }
          // restart the timer
          this.updateTask.delay(this.updateBuffer);
      }
  });
  