/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.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.new_plotter.gui;

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

import com.rapidminer.gui.new_plotter.configuration.ValueSource;
import com.rapidminer.gui.new_plotter.data.PlotInstance;
import com.rapidminer.gui.new_plotter.gui.treenodes.ValueSourceTreeNode;

/**
 * @author Nils Woehler
 *
 */
public abstract class AbstractTreeSelectionDependentPanel extends AbstractConfigurationPanel implements TreeSelectionListener {

	private static final long serialVersionUID = 1L;
	
	private ValueSource currentValueSource = null;

	private ValueSourceTreeNode valueSourceNode = null;

	
	public AbstractTreeSelectionDependentPanel(JTree plotConfigurationTree, PlotInstance plotInstance) {
		super(plotInstance);
		plotConfigurationTree.addTreeSelectionListener(this);
	}
	
	/**
	 * @return the currentValueSource
	 */
	public ValueSource getSelectedValueSource() {
		return (ValueSource) currentValueSource;
	}
	
	public ValueSourceTreeNode getSelectedValueSourceTreeNode() {
		return valueSourceNode;
	}

	@Override
	public void valueChanged(TreeSelectionEvent e) {
		TreePath newLeadSelectionPath = e.getNewLeadSelectionPath();
		if(newLeadSelectionPath==null) {
			return;
		}
		Object lastPathComponent = newLeadSelectionPath.getLastPathComponent();
		if(lastPathComponent instanceof ValueSourceTreeNode) {
			
			valueSourceNode  = (ValueSourceTreeNode) lastPathComponent;
			// get the selected PVC
			ValueSource selectedValueSource = (ValueSource) valueSourceNode .getUserObject();

			if(selectedValueSource == currentValueSource) {
				return;
			}

			// change current PlotValueConfig 
			currentValueSource = selectedValueSource;

			adaptGUI();
		} else {
			currentValueSource = null;
			valueSourceNode = null;
		}
		
	}
}