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DraggableTree.java

package edu.ksu.cis.bandera.pdgslicer.dependency;

import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.plaf.TreeUI;
import java.awt.*;
import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.io.IOException;
public abstract class DraggableTree extends JTree implements DragGestureListener {
    static Transferable currentDraggingTreeNode;
    static boolean draggingTreeNode;
    DragSource dragSource = DragSource.getDefaultDragSource();
    DragSourceListener dragSourceListener = new MyDragSourceListener();
    class MyDragSourceListener implements DragSourceListener {
        public void dragDropEnd(DragSourceDropEvent DragSourceDropEvent) {
            //System.out.println("Drag Drop End");
            //currentDraggingTreeNode = null;
            draggingTreeNode = false;
        }
        public void dragEnter(DragSourceDragEvent DragSourceDragEvent) {
            //      System.out.println ("Drag Enter");
        }
        public void dragExit(DragSourceEvent DragSourceEvent) {
            //System.out.println("Drag Exit");
            //currentDraggingTreeNode = null;
            draggingTreeNode=false;
        }
        public void dragOver(DragSourceDragEvent DragSourceDragEvent) {
            //      System.out.println ("Drag Over");
        }
        public void dropActionChanged(DragSourceDragEvent DragSourceDragEvent) {
            //      System.out.println ("Drag Action Changed");
        }
    }
/*
TreePath path = getSelectionPath();
if (path == null) {
// Nothing selected, nothing to drag
System.out.println("Nothing selected - beep");
getToolkit().beep();
} else {
DefaultMutableTreeNode selection = (DefaultMutableTreeNode) path.getLastPathComponent();
synchronized (this) {
currentDraggingTreeNode = new TransferableTreeNode(selection);
System.out.println("currentDraggingTreeNode: " + currentDraggingTreeNode);
}
dragSource.startDrag(dragGestureEvent, DragSource.DefaultCopyDrop, currentDraggingTreeNode, dragSourceListener);
}
}
*/
  public DraggableTree () {
    dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
  }  
  public DraggableTree (TreeModel model) {
    super (model);
    dragSource.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY_OR_MOVE, this);
  }  
// DragGestureListener

public abstract void dragGestureRecognized(DragGestureEvent dragGestureEvent) 
;
}

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