Enable and Disable Drag Operations

          

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal" creationComplete="creationHandler();">
    <mx:Script>
        
            import mx.events.DragEvent;
            import mx.collections.ArrayCollection;

            [Bindable]
            public var isEnabled:Boolean = true;

            private function creationHandler():void {
                list1.dataProvider = new ArrayCollection(['A', 'B', 'C']);
                list2.dataProvider = new ArrayCollection(['D', 'E', 'F']);
            }
            private function dragEnterHandler( evt:DragEvent ):void {
                evt.target.dropEnabled = ( evt.target != evt.dragInitiator );
            }
      
    </mx:Script>
    <mx:VBox width="100%" height="100%">
        <mx:List id="list1" width="200" height="200" dragEnabled="{isEnabled}" dragMoveEnabled="true"
                dragEnter="dragEnterHandler(event);"/>
        <mx:List id="list2" width="200" height="200" dragEnabled="{isEnabled}"
                dragMoveEnabled="true" dragEnter="dragEnterHandler(event);"/>
    </mx:VBox>

</mx:Application>

1.	Setting the dragMoveEnabled property to move instead of copy
2.	Dragging and dropping within a component, to allow ordering
3.	Create DragSource object and add data to it
4.	Performing a two-way drag and drop
5.	Dragging and dropping in the same control
6.	The drag initiators, and drop target
7.	Get Drag source data format
8.	Press control key as drag and drop
9.	Canvas Drag and Drop
10.	Specifying the drag indicator by using the Drag
11.	Specify a Drag Proxy
12.	Drag Drop To Component
13.	Set liveDragging to true to dispatch change event continuously as moving the thumb
14.	Get drag source from DragEvent
15.	Canvas drag enter event
16.	Explpicitly handle the dragOver event

Enable and Disable Drag Operations : Drag Drop « Development « Flex

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