001/*
002 * Copyright 2010-2015 Institut Pasteur.
003 * 
004 * This file is part of Icy.
005 * 
006 * Icy is free software: you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation, either version 3 of the License, or
009 * (at your option) any later version.
010 * 
011 * Icy is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
014 * GNU General Public License for more details.
015 * 
016 * You should have received a copy of the GNU General Public License
017 * along with Icy. If not, see <http://www.gnu.org/licenses/>.
018 */
019package icy.common.listener.weak;
020
021import java.awt.Window;
022import java.awt.event.WindowEvent;
023import java.awt.event.WindowFocusListener;
024
025/**
026 * @author Thomas
027 */
028public class WeakWindowFocusListener extends WeakListener<WindowFocusListener> implements WindowFocusListener
029{
030    public WeakWindowFocusListener(WindowFocusListener listener)
031    {
032        super(listener);
033    }
034
035    @Override
036    public void removeListener(Object source)
037    {
038        if (source != null)
039            ((Window) source).removeWindowFocusListener(this);
040    }
041
042    @Override
043    public void windowGainedFocus(WindowEvent windowevent)
044    {
045        final WindowFocusListener listener = getListener(windowevent.getWindow());
046
047        if (listener != null)
048            listener.windowGainedFocus(windowevent);
049    }
050
051    @Override
052    public void windowLostFocus(WindowEvent windowevent)
053    {
054        final WindowFocusListener listener = getListener(windowevent.getWindow());
055
056        if (listener != null)
057            listener.windowLostFocus(windowevent);
058    }
059
060}