Mega Code Archive
Specifying the drag indicator by using the Drag
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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- dragdrop\DandDImageProxy.mxml -->
<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">
<fx:Script>
//Import classes so you don't have to use full names.
import mx.managers.DragManager;
import mx.core.DragSource;
import mx.events.DragEvent;
import flash.events.MouseEvent;
// Embed icon image.
[Embed(source='a.jpg')]
public var globeImage:Class;
// The mouseMove event handler for the Image control
// initiates the drag-and-drop operation.
private function mouseOverHandler(event:MouseEvent):void
{
var dragInitiator:Image=Image(event.currentTarget);
var ds:DragSource = new DragSource();
ds.addData(dragInitiator, "img");
// The drag manager uses the Image control
// as the drag indicator and sets the alpha to 1.0 (opaque),
// so it appears to be dragged across the Canvas.
var imageProxy:Image = new Image();
imageProxy.source = globeImage;
imageProxy.height=15;
imageProxy.width=15;
DragManager.doDrag(dragInitiator, ds, event,
imageProxy, -15, -15, 1.00);
}
// The dragEnter event handler for the Canvas container
// enables dropping.
private function dragEnterHandler(event:DragEvent):void {
if (event.dragSource.hasFormat("img"))
{
DragManager.acceptDragDrop(Canvas(event.currentTarget));
}
}
// The dragDrop event handler for the Canvas container
// sets the Image control's position by
// "dropping" it in its new location.
private function dragDropHandler(event:DragEvent):void {
Image(event.dragInitiator).x = Canvas(event.currentTarget).mouseX;
Image(event.dragInitiator).y = Canvas(event.currentTarget).mouseY;
}
</fx:Script>
<!-- The Canvas is the drag target -->
<mx:Canvas id="v1" width="500" height="500" borderStyle="solid"
backgroundColor="#DDDDDD" dragEnter="dragEnterHandler(event);"
dragDrop="dragDropHandler(event);">
<!-- The image is the drag initiator. -->
<mx:Image id="myimg" source="@Embed(source='a.jpg')"
mouseMove="mouseOverHandler(event);" />
</mx:Canvas>
</s:Application>
]]>