/* ======================================================================
   Parts Copyright 2006 University of Leeds, Oxford University, University of the Highlands and Islands.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

====================================================================== */

package org.bodington.applet.components;

import org.bodington.applet.data.*;
import org.bodington.server.resources.*;

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

import java.awt.dnd.*;
import java.awt.datatransfer.*;
import java.beans.*;
import java.io.*;
import java.awt.*;
import java.util.*;


public class MenuTree extends javax.swing.JTree 
	implements java.awt.dnd.DragGestureListener, 
               java.awt.dnd.DragSourceListener,
	           java.awt.dnd.DropTargetListener

	{
	private boolean ok;
	private String message;

	DragSource dragSource = null;
	
	org.bodington.server.resources.Menu menu;
	
	public MenuTree()
		{
   		super((TreeModel)null);			// Create the JTree itself
   		getSelectionModel().setSelectionMode( TreeSelectionModel.SINGLE_TREE_SELECTION );
   		
		setRootVisible( true );
		putClientProperty("JTree.lineStyle", "Angled");

		setMessage( "No files to show" );
		
		//dragSource = new DragSource();
		//dragSource.createDefaultDragGestureRecognizer( this, DnDConstants.ACTION_COPY_OR_MOVE, this);
		}

	public MenuTree( org.bodington.server.resources.Menu menu )
		{
		this();
		setMenu( menu );
		}


    public void drop( DropTargetDropEvent event )
        {
	    System.out.println( "Drop requested" );
	    event.rejectDrop();
        }

    public void dragDropEnd(DragSourceDropEvent dsde)
    	{
        // This method is derived from interface java.awt.dnd.DragSourceListener
        // to do: code goes here
    	}

    public void dragEnter(DragSourceDragEvent dsde)
        {
        // This method is derived from interface java.awt.dnd.DragSourceListener
        // to do: code goes here
        }

    public void dragExit(DragSourceEvent dse)
        {
        // This method is derived from interface java.awt.dnd.DragSourceListener
        // to do: code goes here
        }

    public void dragGestureRecognized(DragGestureEvent dge)
        {
        // This method is derived from interface java.awt.dnd.DragGestureListener
        // to do: code goes here
        }

    public void dragOver(DragSourceDragEvent dsde)
        {
        // This method is derived from interface java.awt.dnd.DragSourceListener
        // to do: code goes here
        }

    public void dropActionChanged(DragSourceDragEvent dsde)
        {
        // This method is derived from interface java.awt.dnd.DragSourceListener
        // to do: code goes here
        }

    public void dragEnter(DropTargetDragEvent dtde)
        {
        System.out.println( "public void dragEnter(DropTargetDragEvent dtde)" );
        dtde.acceptDrag( DnDConstants.ACTION_COPY );
        }

    public void dragExit(DropTargetEvent dte)
        {
        // This method is derived from interface java.awt.dnd.DropTargetListener
        // to do: code goes here
        }

    public void dragOver(DropTargetDragEvent dtde)
        {
        dtde.acceptDrag(DnDConstants.ACTION_COPY);
        }

    public void dropActionChanged(DropTargetDragEvent dtde)
        {
        // This method is derived from interface java.awt.dnd.DropTargetListener
        // to do: code goes here
        }

	public void setMessage( String message )
		{
		ok=false;
		this.message=message;
		this.setModel( new DefaultTreeModel( new DefaultMutableTreeNode( message ) ) );
		}

	public void setMenu( org.bodington.server.resources.Menu menu )
		{
		this.menu = menu;
		setModel( menu );
		
		ok=true;
		}

	public org.bodington.server.resources.MenuItem getSelectedMenuItem()
		{
		TreePath tpath = getSelectionPath();
		if ( tpath == null ) return null;
		org.bodington.server.resources.MenuItem selection = 
		    (org.bodington.server.resources.MenuItem)tpath.getLastPathComponent();

        System.out.println( "getSelectedMenuItem" );
        System.out.println( "selection href = " + selection.getHRef() );
        
        return selection;
		}


	}