Mega Code Archive
JFrame that closes when someone presses the ESC key
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/*
* jMemorize - Learning made easy (and fun) - A Leitner flashcards tool
* Copyright(C) 2004-2008 Riad Djemili and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import javax.swing.AbstractAction;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import javax.swing.WindowConstants;
/**
* A advanced JFrame that closes when someone presses the ESC key.
*
* @author djemili
*/
public abstract class EscapableFrame extends JFrame
{
public EscapableFrame()
{
// on ESC key close frame
getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), "Cancel"); //$NON-NLS-1$
getRootPane().getActionMap().put("Cancel", new AbstractAction(){ //$NON-NLS-1$
public void actionPerformed(ActionEvent e)
{
close();
}
});
// on close window the close method is called
setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
addWindowListener(new WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt)
{
close();
}
});
}
/**
* Is called when the frame is closed by pressing ESC or closing it by
* clicking on the close icon.
*
* @return True if the frame got closed; false otherwise.
*/
abstract public boolean close();
}
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