title: how to use header renderer in AdvandedDataGrids in flex?
body: <p>I'm trying to filter my columns using Advanced Datagrids. It works weel for all the columns except for columns with header renderers. Any clue?</p>
  
  <pre><code>&lt;mx:AdvancedDataGridColumn
     &lt;mx:AdvancedDataGridColumn  headerText=" " editable="false" width="20" 
                                      sortable="false" textAlign="center" dataField="selected" 
                                      editorDataField="selected" id="selectednamesData" &gt;
                      &lt;mx:itemRenderer&gt;
                          &lt;mx:Component&gt;
                              &lt;mx:CheckBox selected="{data.selected}" 
                                           click="applyfilters(event);"&gt;   
                                  &lt;mx:Script&gt;
                                      &lt;![CDATA[
                                          import mx.controls.ComboBox;
                                          import mx.collections.ArrayCollection;
  
  
                                          public function applyfilters(event:Event):void {
                                        //getting required data
  
                                          }
                                      ]]&gt;
                                  &lt;/mx:Script&gt;                
                              &lt;/mx:CheckBox&gt;
                          &lt;/mx:Component&gt;
                      &lt;/mx:itemRenderer&gt; 
     &lt;/mx:AdvancedDataGridColumn&gt;       
     &lt;mx:AdvancedDataGridColumn headerText="Name" dataField="Name_code" width="50"/&gt;
     &lt;mx:AdvancedDataGridColumn headerText="FirstName" dataField="FirstName_code" width="50"/&gt;
     &lt;mx:AdvancedDataGridColumn headerText="LastName" dataField="lastName_code" width="50"/&gt;
     &lt;mx:AdvancedDataGridColumn headerText="PhNum" dataField="Pnum_code" width="50"/&gt;
     &lt;mx:AdvancedDataGridColumn headerText="Salary" dataField="salary_price"  width="75"
                      labelFunction="salaryPrice"  
                       headerRenderer="com.abc.myHeaderRenderer1"/&gt;
     &lt;mx:AdvancedDataGridColumn headerText="OriginCountry" dataField="Origin_Country"  width="75"                                                                                     
                          labelFunction="originFn"          
                        headerRenderer="com.dpp.myHeaderRenderer2"/&gt;/&gt;
  </code></pre>
  
  <p></p>
  
  <p>I've defined my custom headerRenderers which were extended by label and text respectively.
  I can compile my code without errors but Filters are not getting applied to the columns where i have headerRenderers. however filters are applied to remaining columns  Am i missing any anything??</p>