如何聆听由Flex中的渲染器调度的自定义事件？

Question

我遇到以下问题：我为我的DataGridColumn实现了一个自定义headRenderer。这个想法是当点击列标题时有一个下拉菜单。问题是我不知道如何添加一个监听器或将一个变量传递给渲染器，因为渲染器类由ClassFactory实例化。

渲染器类：

<?xml version="1.0"?> 
<!-- itemRenderers\dataGrid\myComponents\RendererDGHeader.mxml --> 
<mx:HBox xmlns:mx="library://ns.adobe.com/flex/mx" 
xmlns:fx="http://ns.adobe.com/mxml/2009" 
width = "100%" 
> 
<fx:Script> 


// ... 

// Event handler for the Menu control's change event. 
     private function menuHandler(evt:MenuEvent):void { 
      //Alert.show("Label: " + evt.item.@label, "Clicked menu item"); 

      if (evt.item.@eventName == "typeLat"){ 
      typeIcon.load("assets/type_location.jpg"); 
      evt.item.toggled=true; 
      //variable.setColumnType(myLabel.text, "type"); // how can I pass "variable" to this renderer?     
      } else if (evt.item.@eventName == "typeLng"){ 
      typeIcon.load("assets/type_location.jpg"); 
      evt.item.toggled=true; 
      } else if (evt.item.@eventName == "typeTime"){ 
      typeIcon.load("assets/type_time.png"); 
       evt.item.toggled=true; 
      } 

      else if (evt.item.@eventName == "similarity"){ 
       dispatchEvent(new SimilarityEvent("selectSimilarity", null, null)); // how to listen to this event? 
      } 
     } 



</fx:Script> 

<fx:Declarations> 
    <fx:XML id="myMenuData"> 
     <root> 
      <menuitem label="Select type..." eventName="copy"> 
       <menuitem label="Other..." eventName="typeOther"/> 
       <menuitem type="separator"/> 
       <menuitem label="Order" type="check" eventName="typeOther"/> 
       <menuitem label="Range" type="check" eventName="typeOther"/> 
       <menuitem label="Date/Time" type="check" eventName="typeTime"/> 
       <menuitem label="Latitude" type="check" eventName="typeLat"/> 
       <menuitem label="Longitude" type="check" eventName="typeLng"/> 
      </menuitem> 
      <menuitem label="Define similarity..." eventName="similarity"/> 
      <menuitem type="separator"/> 
      <menuitem label="Filter objects..." eventName="similarity"/> 
      <menuitem label="Order" eventName="similarity"> 
       <menuitem label="Ascending" eventName="typeOther"/> 
       <menuitem label="Descending" eventName="typeOther"/> 
      </menuitem> 
      <menuitem type="separator"/> 
      <menuitem label="Remove" eventName="paste"/> 
     </root> 
    </fx:XML> 
</fx:Declarations> 



<mx:Label id="myLabel" click="showMenu();"/> 
<mx:Image height="20" id = "typeIcon"/> 

</mx:HBox> 

这里是我实例演示器：

  var newColumn:DataGridColumn = new DataGridColumn(); 
      newColumn.dataField = attr; 
      newColumn.headerText = attr; 
      newColumn.sortable = false; 
      newColumn.editable = false; 
      newColumn.draggable = false; 
      newColumn.headerRenderer = new ClassFactory(newviews.RendererDataHeader); 
      cols.push(newColumn); 

任何帮助，将不胜感激

Answer 1

添加事件监听器来控制（数据网格），并事件泡沫，它将被捕获。