mustella/tests/Managers/DragManager/SWFs/DragManager_Tree_spark.mxml

<?xml version="1.0" encoding="utf-8"?>
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  this work for additional information regarding copyright ownership.
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<s:Application  height="650" width="500" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark" initialize="initApp()">
<s:layout>
    <s:VerticalLayout />
</s:layout>
<fx:Script>
    <![CDATA[

    import mx.events.DragEvent;
    import mx.managers.DragManager;
    import mx.core.DragSource;
    import mx.core.mx_internal;
    import mx.managers.DragManager;
    import mx.collections.*;

    public function initApp():void {
        srcTileList.dataProvider = ["Jane"];
        destTree.dataProvider = treeDP;
    }

    public function doDragOver(event:DragEvent) : void
    {
        event.preventDefault();

        mx.managers.DragManager.showFeedback(event.ctrlKey ? mx.managers.DragManager.COPY : mx.managers.DragManager.MOVE);
        TileList(event.target).showDropFeedback(event);
    }

    public function doDragEnter(event:DragEvent): void
    {
        event.preventDefault();

        mx.managers.DragManager.acceptDragDrop(TileList(event.target));
        mx.managers.DragManager.showFeedback(event.ctrlKey ? mx.managers.DragManager.COPY : mx.managers.DragManager.MOVE);
        TileList(event.target).showDropFeedback(event);
    }

    public function doDragDrop(event:DragEvent): void
    {
        event.preventDefault();
        var myTileList:TileList = TileList(event.target);
        myTileList.hideDropFeedback(event);

        if (event.dragSource.hasFormat("treeItems"))
        {
            if (!myTileList.dataProvider)
               // Create an empty collection to drop items into.
               myTileList.dataProvider = [];

            var items:Array = event.dragSource.dataForFormat("treeItems") as Array;
            for (var i:int = items.length - 1; i >= 0; i--)
            {
               myTileList.dataProvider.addItemAt(String(items[i].@label), TileList(event.target).calculateDropIndex(event));
            }
        }
    }

    public function doDragComplete(event:DragEvent): void
    {
        event.preventDefault();
        if (event.action == mx.managers.DragManager.MOVE && Tree(event.target).dragMoveEnabled)
        {
            var target:Tree = Tree(event.target)
            if (event.relatedObject != this)
            {
                //if we dropped on another component
                //then we need to remove from ourself first
                var items:Array = event.dragSource.dataForFormat("treeItems") as Array;
                var parent:*;
                var index:int;

                //do the remove
                for (var i:int=0; i<items.length; i++)
                {
                    parent = target.getParentItem(items[i]);
                    index = getChildIndexInParent(parent, items[i], target);
                    target.mx_internal::removeChildItem(parent, items[i], index);
                 }
             }
        }
    }

    private function getChildIndexInParent(parent:Object, child:Object, target:Tree):int
    {
        var index:int = 0;
        if (!parent)
        {
            var cursor:IViewCursor = ICollectionView(target.dataProvider).createCursor();
            while (!cursor.afterLast)
            {
                if (child === cursor.current)
                    break;
                index++;
                cursor.moveNext();
            }
        }
        else
        {
            if (parent != null && target.dataDescriptor.isBranch(parent) &&
                target.dataDescriptor.hasChildren(parent))
            {
                var children:ICollectionView = target.dataDescriptor.getChildren(parent);
                if (children.contains(child))
                {
                    for (; index < children.length; index++)
                    {
                       if (child === children[index])
                       break;
                    }
                }
             }
        }
        return index;
    }

]]>
</fx:Script>
<fx:Declarations>
<fx:XML id="treeDP" format="e4x">
   <rootnode>
        <node label="Mail">
            <node label="Inbox"/>
            <node label="Personal Folder">
                <node label="Demo" isBranch="true" />
                <node label="Personal" isBranch="true" />
                <node label="Saved Mail" isBranch="true" />
                <node label="bar" isBranch="true" />
            </node>
            <node label="Sent" isBranch="true" />
            <node label="Trash"/>
        </node>
        <node label="Calendar"/>
   </rootnode>
</fx:XML>
</fx:Declarations>
<mx:HBox>
   <mx:Tree id="firstTree" width="250" dragEnabled="true"
        showRoot="false" dragMoveEnabled="true" dropEnabled="true"  />

<mx:Tree id="secondTree" dataProvider="[]" dropEnabled="true" dragEnabled="true"
        dragMoveEnabled="true"  />
</mx:HBox>

<mx:Label width="100%" text="Drag Tree items to the TileList" />

<mx:TileList id="srcTileList"
    dropEnabled="true"
    dragOver="doDragOver(event)"
    dragEnter="doDragEnter(event)"
    dragDrop="doDragDrop(event)"
    columnWidth="100" />

<mx:Tree id="destTree"
    dragEnabled="true"
    labelField="@label"
    showRoot="false"
    dragComplete="doDragComplete(event)"
    width="250" />
</s:Application>