/*
 *  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;

import java.util.List;

import com.rapidminer.Process;
import com.rapidminer.ProcessListener;
import com.rapidminer.gui.processeditor.ProcessEditor;
import com.rapidminer.operator.Operator;


/** This listener must be created after the GUI is set up. It will then
 *  register automatically with every newly created or opened process.
 * 
 * @author Simon Fischer
 *
 */
public abstract class GeneralProcessListener implements ProcessListener {

	private Process process;
	
	public GeneralProcessListener() {
		register();
	}

	private void register() {
		RapidMinerGUI.getMainFrame().addProcessEditor(new ProcessEditor() {
			@Override
			public void processChanged(Process process) {
				if (GeneralProcessListener.this.process != null) {
					GeneralProcessListener.this.process.getRootOperator().removeProcessListener(GeneralProcessListener.this);
				}
				GeneralProcessListener.this.process = process;
				if (GeneralProcessListener.this.process != null) {
					GeneralProcessListener.this.process.getRootOperator().addProcessListener(GeneralProcessListener.this);
				}				
			}

			@Override
			public void processUpdated(Process process) { }

			@Override
			public void setSelection(List<Operator> selection) { }
			
		});
	}
	
}