🚀 go-pugleaf

Hi,

You could try looking into using the TreeModel. It has a method
removeNodeFromParent(Node child).

So
TreeModel treeModel = jTree.getModel();

treeModel.removeNodeFromParent(node)

Hope this works,

Mark.

In article <37565680.14EBD220@nupis.de>,
  Michael =?iso-8859-1?Q?H=E4rtig?= <haertig@nupis.de> wrote:
> Hi all,
>
> I try to make a tree. The nodes should drag and drop in the same tree.
I
> created a Transferable that contains a Node as userObject. The tree is
> DragSource and DropTarget. If the drop event occurs I get the
> Transferable and the included node. I try to add the node to the
target
> node -> it works. I try to remove the node from the old position ->
> nothing. If I make a System.out.println with the dragged node and the
> dropped node I get different outputs. This is the output from the
> userObject in the node (I think). I get "FMObject@26dbec" and
> "FMObject@52fc36". But the methods (MyObject.getValue()) get the same
> values.
>
> Does anybody have done this before? Any code example?
>
> Some of my code:
>
> public class NupNode extends DefaultMutableTreeNode{
>
>   private FMObjekt fmObjekt = new FMObjekt();	//Only a sublass from
> Object
>
>   public NupNode(){
>     super();
>     this.fmObjekt = new FMObjekt();
>   }
>
>   public NupNode(FMObjekt fmObjekt){
>     super(fmObjekt);
>     this.fmObjekt = fmObjekt;
>   }
>
>   public FMObjekt getFMObjekt(){
>     return fmObjekt;
>   }
> }
>
> public class NupTree extends JTree implements DragGestureListener,
> DropTargetListener {
>
>   DragSource dragSource = DragSource.getDefaultDragSource();
>   DropTarget dropTarget;
>   final static DragSourceListener dragSourceListener = new
> MyDragSourceListener();
>
>   static class MyDragSourceListener  implements DragSourceListener {
>     public void dragDropEnd(DragSourceDropEvent DragSourceDropEvent)
{}
>     public void dragEnter(DragSourceDragEvent DragSourceDragEvent) {}
>     public void dragExit(DragSourceEvent DragSourceEvent) {}
>     public void dragOver(DragSourceDragEvent DragSourceDragEvent) {}
>     public void dropActionChanged(DragSourceDragEvent
> DragSourceDragEvent) {}
>   }
>
>   public NupTree () {
>     dragSource.createDefaultDragGestureRecognizer(this,
> DnDConstants.ACTION_COPY_OR_MOVE, this);
>     dropTarget = new DropTarget (this, this);
>   }
>
>   // DragGestureListener
>   public void dragGestureRecognized(DragGestureEvent dragGestureEvent)
{
>     TreePath path = getSelectionPath();
>     if (path == null) {
>       System.out.println ("Nothing!");
>     }
>     else {
>       NupNode node = (NupNode)path.getLastPathComponent();
>       if (node.isLeaf()){
>         TransferableElement tr = new TransferableElement(node);
>         System.out.println("send "+node);
	//out: "FMObject@26dbec"
>         System.out.println("send "+node.getFMObjekt().getFmNummer());
> //out: "1"
>
>
dragSource.startDrag(dragGestureEvent,DragSource.DefaultCopyDrop,tr,drag
SourceListener);
>       }
>     }
>   }
>   //DropTargetListener
>   public void dragEnter (DropTargetDragEvent dropTargetDragEvent) {
>     dropTargetDragEvent.acceptDrag (DnDConstants.ACTION_COPY_OR_MOVE);
>   }
>   public void dragExit (DropTargetEvent dropTargetEvent) {}
>   public void dragOver (DropTargetDragEvent dropTargetDragEvent) {}
>   public void dropActionChanged (DropTargetDragEvent
> dropTargetDragEvent) {}
>   public synchronized void drop (DropTargetDropEvent
> dropTargetDropEvent) {
>     try {
>       Transferable tr = dropTargetDropEvent.getTransferable();
>       if (tr.isDataFlavorSupported(TransferableElement.NODE_FLAVOR)) {
>         dropTargetDropEvent.acceptDrop
> (DnDConstants.ACTION_COPY_OR_MOVE);
>         NupNode node =
> (NupNode)tr.getTransferData(TransferableElement.NODE_FLAVOR);
>         System.out.println("get "+node);
//out: "FMObject@52fc36"
>         System.out.println("get "+node.getFMObjekt().getFmNummer());
> //out: "1"
>         NupNode parentNode =
>
(NupNode)((this.getPathForLocation(dropTargetDropEvent.getLocation().x,d
ropTargetDropEvent.getLocation().y)).getLastPathComponent());
>         parentNode.add(node);	//this works
> 	node.removeFromParent();//does
nothing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>         dropTargetDropEvent.getDropTargetContext().dropComplete(true);
>       }
>     }
>     catch (Exception e) {
>       e.printStackTrace();
>       dropTargetDropEvent.rejectDrop();
>     }
>   }
> }
>
> public class TransferableElement implements Transferable{
>
>   private NupNode node;
>
>   final public static DataFlavor NODE_FLAVOR =  new
> DataFlavor(NupNode.class,"Nup Node");
>   static DataFlavor flavors[] = {NODE_FLAVOR};
>
>   public TransferableElement(NupNode nupNode){
>     this.node = nupNode;
>   }
>
>   public boolean isDataFlavorSupported(DataFlavor flavor) {
>     boolean returnValue = false;
>     for (int i=0 ; i<flavors.length; i++) {
>       if (flavor.equals(flavors[i])) {
>         returnValue = true;
>         break;
>       }
>     }
>     return returnValue;
>   }
>
>   public DataFlavor[] getTransferDataFlavors() {
>     return flavors;
>   }
>
>   public Object getTransferData(DataFlavor flavor) throws
> UnsupportedFlavorException {
>     return node;
>   }
> }
>
> Bye Michael
> --
>            ////
>           (o o)
> +-----ooO--(_)--Ooo---------------------------------------+
> |                                                         |
> | Michael H�rtig                 Neumann & Partner        |
> |                                Informationssysteme GmbH |
> | Softwareentwicklung            An der Hohen Stra�e 1    |
> |                                08393 Meerane            |
> |                                                         |
> +------------Oooo-----------------------------------------+
>         oooO (  )
>         (  )  (_)
>          (_)
>



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