commonsrc.ingenias.editor.widget.DnDJTree Maven / Gradle / Ivy

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The INGENIAS Meta-Editor core. It is a set of facilities to generate an editor from a detailed xml description
There is a newer version: 1.0.9
/*
    This code has been extracted and modified from an original
    work from Rob Kenworthy and an example from Sheetal Gupta
    (http://java.sun.com/docs/books/tutorial/dnd/sheetal.html)

 */

package ingenias.editor.widget;

import javax.swing.JTree;
import java.awt.dnd.*;
import java.awt.Point;
import java.awt.datatransfer.*;
import java.awt.Cursor;
import java.io.*;

import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.*;

import java.awt.Component;
import org.jgraph.JGraph;
import javax.swing.JViewport;
import java.awt.*;

import java.awt.*;
import java.awt.dnd.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import javax.swing.*;
import java.util.*;


public class DnDJTree extends JTree implements java.io.Serializable,
DropTargetListener,DragSourceListener,DragGestureListener{

	public JScrollPane getContainer() {
		return container;
	}
	

	public void setContainer(JScrollPane container) {
		this.container = container;
	}

	DropTarget dropTarget=null;
	DragSource dragSource=null;
	JScrollPane container=null;
	Vector expansionPaths=new Vector();

	boolean dragOn=false;

	DefaultMutableTreeNode nodeInTransfer=null;
	TreeNode root=null;

	public DnDJTree(JScrollPane jsp,TreeNode tn) {
		super(tn);
		this.setAutoscrolls(true);
		this.container=jsp;
		final JTree jt=this;
		this.root=tn;
		dropTarget=new DropTarget(this,this);
		dragSource=new DragSource();
		dragSource.createDefaultDragGestureRecognizer(this,
				DnDConstants.ACTION_MOVE,this);
		this.setEditable(true); 


		this.addKeyListener(new KeyListener(){

			public void keyPressed(KeyEvent e) {
				// TODO Auto-generated method stub

			}

			public void keyReleased(KeyEvent e) {

			}

			// Code added to make nodes go up and down among siblings
			public void keyTyped(final KeyEvent e) {
				if (e.getKeyChar()=='q' && jt.getSelectionPath()!=null){
					DefaultMutableTreeNode node =
						(DefaultMutableTreeNode)jt.getSelectionPath().getLastPathComponent();
					if (node.getParent()!=null){
						int index=node.getParent().getIndex(node);
						if (index>0){
							DefaultMutableTreeNode parent=(DefaultMutableTreeNode)node.getParent();
							node.removeFromParent();
							parent.insert(node, index-1);
							node.setParent(parent);
							storeTreeExpansionPaths();
							((DefaultTreeModel)getModel()).reload();
							validate();
							restoreTreeExpansionPath();
							jt.addSelectionPath(new TreePath(node.getPath()));
						}
					}
				}
				if (e.getKeyChar()=='z' && jt.getSelectionPath()!=null){
					DefaultMutableTreeNode node =
						(DefaultMutableTreeNode)jt.getSelectionPath().getLastPathComponent();
					if (node.getParent()!=null){
						int index=node.getParent().getIndex(node);
						if (index10)){
			container.validate();

			container.getVerticalScrollBar().setValue(container.getVerticalScrollBar().getValue()-10);
		}




		// this.getLocation()

		if (dmtn!=null){


			this.setSelectionPath(new TreePath(dmtn.getPath()));

		} else {
		}
	}

	public void dragOver (DropTargetDragEvent event) {
		this.moveMouseWithDrag(event.getLocation());


	}

	/**
	 * is invoked when the user changes the dropAction
	 *
	 */

	public void dropActionChanged ( DragSourceDragEvent event) {

	}


}