Posted on: July 12, 2010 at 12:00 AM
Drag and Drop in Flex4:
Drag and Drop is the operation in which you can drag and
drop an item or component in to another component. The drag and drop operation
in-build in certain controls such as List, Tree and DataGrid. There are three
stages of drag and drop operation which are following:
1. Initiation
2. Dragging
3. Dropping
You will use three property for performing drag and drop operation:
1. dragEnabled
2. dropEnabled
3. dragMoveEnabled
In this example you can see how we can use the drag and drop operation with item
of component.
Example:
|
<?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"xmlns:s=" library://ns.adobe.com/flex/spark"xmlns:mx=" library://ns.adobe.com/flex/mx"minWidth=" 955" minHeight="600"creationComplete="gridinitialize()" &> <fx:Script><![CDATA[ import mx.collections.ArrayCollection; private function gridinitialize():void {studentData.dataProvider = new ArrayCollection([{aName: 'Bikrant', DOB:'01/01/1986',City: 'Delhi', State:'NewDelhi'},{aName: 'Brijesh', DOB:'15/07/1984',City: 'Noida', State:'Uttar Pradesh'},{aName: 'Gaurav', DOB:'27/06/1989',City: 'Mumbai', State:'Maharashtra'}]); data.dataProvider= new ArrayCollection([]);} ]]> </fx:Script> <s:Panel title="Drag and Drop Example/font>&"chromeColor=" #555555/font>"color=" #CCCCCC" width="425" height="508"&> <mx:ApplicationControlBar width="423"horizontalAlign=" center"> <s:Label text="Student Information"color=" #000000"fontFamily=" Verdana"/> </mx:ApplicationControlBar> <mx:DataGrid id="studentData"allowMultipleSelection=" true"dragEnabled=" true"dropEnabled=" true/font>&"dragMoveEnabled=" true/font>"color=" #000000"x=" 10" y="38"&> <mx:columns> <mx:DataGridColumn dataField="aName"/> <mx:DataGridColumn dataField="DOB"/> <mx:DataGridColumn dataField="City"/> <mx:DataGridColumn dataField="State"/> </mx:columns> </mx:DataGrid> <mx:ApplicationControlBar width="423/font>"x=" 0" y="228&"horizontalAlign=" center/font>"&> <s:Label text="Selected Student Information"color=" #000000"fontFamily=" Verdana"/> </mx:ApplicationControlBar> <mx:DataGrid id="data"allowMultipleSelection=" true/font>"dropEnabled=" true"color=" #000000"x=" 11" y="265"> <mx:columns> <mx:DataGridColumn dataField="aName"/> <mx:DataGridColumn dataField="DOB"/> <mx:DataGridColumn dataField="City"/> <mx:DataGridColumn dataField="State"/> </mx:columns> </mx:DataGrid> <s:Button id="reset"label=" Reset"x=" 177" y="446"click="gridinitialize();" /> </s:Panel>&</s:Application> |
Output:
Running Application:
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