/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.tools;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JCheckBox;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreePath;

/**
 * This is a mouse listener for check trees in order to update the selection events.
 * 
 * @author Santhosh Kumar, Ingo Mierswa
 */
public class ExtendedCheckTreeMouseSelectionManager extends MouseAdapter implements TreeSelectionListener {

	private ExtendedCheckTreeSelectionModel selectionModel;
	
	private JTree tree = new JTree();
	
	int hotspot = new JCheckBox().getPreferredSize().width;

	public ExtendedCheckTreeMouseSelectionManager(JTree tree, boolean selectAll) {
		this.tree = tree;
		selectionModel = new ExtendedCheckTreeSelectionModel(tree.getModel());
		
		if (selectAll) {
			selectionModel.addSelectionPath(tree.getPathForRow(0));
		}
		
		tree.setCellRenderer(new ExtendedCheckTreeCellRenderer(new DefaultTreeCellRenderer(), selectionModel));
		tree.addMouseListener(this);
		selectionModel.addTreeSelectionListener(this);
	}

	@Override
	public void mouseClicked(MouseEvent me) {
		TreePath path = tree.getPathForLocation(me.getX(), me.getY());
		if (path == null)
			return;
		if (me.getX() > tree.getPathBounds(path).x + hotspot)
			return;

		boolean selected = selectionModel.isPathSelected(path, true);
		selectionModel.removeTreeSelectionListener(this);

		try {
			if (selected)
				selectionModel.removeSelectionPath(path);
			else
				selectionModel.addSelectionPath(path);
		} finally {
			selectionModel.addTreeSelectionListener(this);
			tree.treeDidChange();
		}
	}

	public ExtendedCheckTreeSelectionModel getSelectionModel() {
		return selectionModel;
	}

	public void valueChanged(TreeSelectionEvent e) {
		tree.treeDidChange();
	}
}