爲itemRollOver使用自定義工具提示

Question

我有這樣的自定義工具提示：

<?xml version="1.0" encoding="utf-8"?> 
<mx:VBox xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx" 
     implements="mx.core.IToolTip" 
     creationPolicy="all" 
     cornerRadius="4" borderStyle="solid" backgroundColor="#FFFFFF" 
     creationComplete="init()" width="100" height="100"> 
    <fx:Script> 
    <![CDATA[ 
     import mx.core.IToolTip; 

    public var arrItemsKits:Array=[]; 
    public var _text:String; 

    public function get text():String { 
    return _text; 
    } 
    public function set text(value:String):void { 
    } 

    protected function init():void 
    { 
    grid.dataProvider=arrItemsKits; 
    } 

]]> 
    </fx:Script> 



    <mx:DataGrid id="grid" width="100%" height="100%"> 
    <mx:columns> 
     <mx:DataGridColumn headerText="Code" dataField="itemPartNumber"/> 
     <mx:DataGridColumn headerText="Description" dataField="kitItemsNotes"/> 
    </mx:columns> 
    </mx:DataGrid> 


</mx:VBox> 

，我想它開火，當我在從DataGrid一排滾動鼠標，所以我需要添加一個事件偵聽器（toolTipCreate ）到該網格的行。

任何想法如何解決這個問題？

感謝

Answer 1

我想通了：在爲itemRollOver處理程序添加event.itemRenderer.addEventListener(ToolTipEvent.TOOL_TIP_CREATE, createTT);

Answer 2

看看這個

<!-- myDataGridTest.mxml --> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"> 

    <mx:Script> 
     <![CDATA[ 
      import mx.events.ListEvent; 
      import mx.core.IToolTip; 
      import mx.events.ToolTipEvent; 

      // holds the currently highlighted item 
      private var highlightedItem:Object; 

      // event listener to get our hands on the currently highlighted item. 
      private function getHighlightedItem(e:ListEvent):void { 
       highlightedItem = e.itemRenderer.data; 
       // Quick n dirty way to force the ToolTipManager to refresh our tooltip. 
       // We need to dispatch this by hand because the pointer never leaves myDataGrid 
       // between successive highlights. 
       myDataGrid.dispatchEvent(new MouseEvent(MouseEvent.MOUSE_OUT)); 
      } 

      private function createTooltip(e:ToolTipEvent):void { 
       var tt:MyCustomTooltip = new MyCustomTooltip(); 
       tt.firstName = highlightedItem.name; 
       tt.lastName = highlightedItem.surname; 
       // Contract with the tooltip manager: if it finds an IToolTip instance attached to 
       // the event, it uses that instance instead of creating the standard one. 
       e.toolTip = tt; 
      } 
     ]]> 
    </mx:Script> 

    <mx:DataGrid id="myDataGrid" toolTip=" " toolTipCreate="createTooltip(event)" itemRollOver="getHighlightedItem(event)"> 
     <mx:dataProvider> 
      <mx:Object name="john" surname="doe"/> 
      <mx:Object name="mike" surname="smith"/> 
     </mx:dataProvider> 
    </mx:DataGrid> 

</mx:Application> 

<!-- MyCustomTooltip.mxml --> 
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" implements="mx.core.IToolTip" 
    backgroundColor="yellow" backgroundAlpha="0.6"> 

    <mx:Script> 
     <![CDATA[ 
      private var _firstName:String; 
      private var _lastName:String; 

      // Dummy implementations to comply with mx.core.IToolTip 
      public function get text():String {return null;} 
      public function set text(value:String):void {} 

      // properties and functions 

      public function set firstName(value:String):void { 
       _firstName = value; 
       invalidateProperties(); 
      } 

      public function set lastName(value:String):void { 
       _lastName = value; 
       invalidateProperties(); 
      } 

      override protected function commitProperties():void { 
       fName.text = _firstName; 
       lName.text = _lastName; 
      } 
     ]]> 
    </mx:Script> 

    <mx:Label x="0" y="0" id="fName"/> 
    <mx:Label x="0" y="20" id="lName"/> 

</mx:Canvas> 

。 。 或嘗試類似這樣的 。 。

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="doInit();"> 
<mx:Script> 
<!![CDATA[import mx.collections.ArrayCollection; // this holds the grid data 
[Bindable] 
private var myData:ArrayCollection = new ArrayCollection();private function doInit():void{ 
myData.addItem({fname:"Joe",lname:"Bloggs"}); 
myData.addItem({fname:"Joe1",lname:"Bloggs"}); 
} 

private function buildToolTip(item:Object):String{ 
var myString:String = ""; 
if(item != null) 
{ 
myString = myString + "Firstname : " + item.fname + "\n"; 
myString = myString + "Lastname : " + item.lname + "\n" 
} 
return myString; 
} 
]]> 
</mx:Script> 
<mx:DataGrid id="dGrid" dataProvider="{myData}" visible="true" dataTipFunction="buildToolTip"> 
<mx:columns> 
<mx:DataGridColumn dataField="fname" headerText="FirstName" showDataTips="true" /> 
<mx:DataGridColumn dataField="lname" headerText="LastName" showDataTips="true" /> 
</mx:columns> 
</mx:DataGrid> 
</mx:Application>