removeobservers.java

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/**
 *   Copyright 2004 Carlos Silva A.
 * 
 *   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 jgantt.view.dialogs;

import java.awt.Window;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import jgantt.model.ProjectListener;
import jgantt.view.adapters.ProjectViewModel;
import jgantt.view.adapters.ProjectViewModelListener;

/**
 * RemoveObservers quita los observadores cuando una ventana se cierra
 * 
 * <p>$Date: 2004/04/24 06:44:25 $</p> 
 * @version $Revision: 1.4 $
 * @author Carlos Silva
 */
public class RemoveObservers implements WindowListener {
	ProjectListener prjObs;
	ProjectViewModelListener pvmObs;
	ProjectViewModel pvModel;
	public RemoveObservers(Window w,	
		ProjectViewModel pvModel,		
		ProjectViewModelListener pvmObs,
		ProjectListener prjObs) {
		this.pvmObs = pvmObs;
		this.prjObs = prjObs;
		this.pvModel = pvModel;
		w.addWindowListener(this);
	}

	public void windowActivated(WindowEvent arg0) {
	}
	public void windowClosed(WindowEvent arg0) {
	}

	public void windowClosing(WindowEvent arg0) {
		if (pvmObs != null)
			pvModel.removeListener(pvmObs);
		if (prjObs != null)
			pvModel.getProject().removeListener(prjObs);
	}
	public void windowDeactivated(WindowEvent arg0) {
	}

	public void windowDeiconified(WindowEvent arg0) {
	}

	public void windowIconified(WindowEvent arg0) {
	}

	public void windowOpened(WindowEvent arg0) {
	}

}