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Flex component move using drag and drop in Flex4
Posted on: July 12, 2010 at 12:00 AM
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In this example you can see how we can drag and drop the component from one place to another.

Flex component move using drag and drop in Flex4:

In this example you can see how we can drag and drop the component from one place to another. There are the three classes of drag and drop operation:

1. DragManager: It manages the drag and drop operation using doDrag() method.
2. DragSource: It contains the data which is dragged.
3. DragEvent: It represent the drag and drop events.

In this example we will drag and drop a Button control in a Panel from one place to another.

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">

<fx:Script>

<![CDATA[

import mx.managers.DragManager;

import mx.core.DragSource;

import mx.events.DragEvent;

import flash.events.MouseEvent;

// initialize the drag and drop operation

private function mouseMoveHandler(event:MouseEvent):void

{

var dragInitiator:Button=Button(event.currentTarget);

var dragSource:DragSource = new DragSource();

dragSource.addData(dragInitiator, "button");

DragManager.doDrag(dragInitiator, dragSource, event);

}

private function dragEnterHandler(event:DragEvent):void {

if (event.dragSource.hasFormat("button"))

{

DragManager.acceptDragDrop(Panel(event.currentTarget));

}

}

private function dragDropHandler(event:DragEvent):void {

Button(event.dragInitiator).x =

Panel(event.currentTarget).mouseX;

Button(event.dragInitiator).y =

Panel(event.currentTarget).mouseY;

}

]]>

</fx:Script>

<s:Panel title="Flex component move using drag and drop"

width="386" height="282"

chromeColor="#555555"

color="#CCCCCC"

dragEnter="dragEnterHandler(event);"

dragDrop="dragDropHandler(event);">

<s:Button id="btn" label="Drag Button"

mouseMove="mouseMoveHandler(event)"/>

</s:Panel>

</s:Application>

Output:

Running Application:

To view this page ensure that Adobe Flash Player version 10.0.0 or greater is installed.

Download this code

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Posted on: July 12, 2010

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