/*
 *  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;

import java.util.List;

import com.rapidminer.Process;
import com.rapidminer.ProcessListener;
import com.rapidminer.RapidMiner;
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() {
		if (!RapidMiner.getExecutionMode().isHeadless()) {
			final ProcessEditor processEditor = 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) { }

			};
			RapidMinerGUI.getMainFrame().addProcessEditor(processEditor);
		}
	}

}