Re: Proper way to handle window closing and program shutdown



On Tue, 17 Jun 2008 13:42:04 +0200, Hendrik Maryns
<gtw37bn02@xxxxxxxxxxxxxx> wrote, quoted or indirectly quoted someone
who said :

I have an applications which lets users edit some stuff in a main field.
~ If the user closes it down without saving, I want to ask him. For this
I created a save Action and a quit Action which calls the save action if
necessary.

Here are my two typical shutdowns one for AWT and one for SWING that
let me run an Applet as an application.


/*
Converts a Applet into an Application.

copyright (c) 2006-2008 Roedy Green, Canadian Mind Products
may be copied and used freely for any purpose but military.
Roedy Green
Canadian Mind Products
#101 - 2536 Wark Street
Victoria, BC Canada
V8T 4G8
tel: (250) 361-9093
roedy g at mindprod dotcom
http://mindprod.com

Version History
1.0 2006-03-07 initial version.
*/
package com.mindprod.common11;

import java.applet.Applet;
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
* Converts a Applet into an Application.
*
* @author Roedy Green, Canadian Mind Products
* @version 1.0, 2006-03-07 Created with IntelliJ IDEA.
*/
public final class Hybrid
{
// -------------------------- PUBLIC STATIC METHODS
--------------------------

/**
* Fire up the Applet as an application
*
* @param title title for frame usually TITLE_STRING+
" " + VERSION_STRING
* @param applicationWidth width of frame, usually APPLET_WIDTH
* @param applicationHeight height of frame body, usually
APPLET_HEIGHT
*/
public static void fireup( final Applet applet,
final String title,
final int applicationWidth,
final int applicationHeight )
{
final Frame frame = new Frame( title );
// allow some extra room for the frame title bar.
frame.setSize( applicationWidth + 16, applicationHeight + 36
);
frame.addWindowListener( new WindowAdapter()
{
/**
* Handle request to shutdown.
*
* @param e event giving details of closing.
*/
public void windowClosing( WindowEvent e )
{
applet.stop();
applet.destroy();
System.exit( 0 );
}// end WindowClosing
}// end anonymous class
);// end addWindowListener line

frame.add( applet );
applet.init();
frame.validate();
frame.setVisible( true );
applet.start();
}
}
----------------------------------------------------------------------------------------------------

/*
Converts a JApplet into an Application.

copyright (c) 2005-2008 Roedy Green, Canadian Mind Products
may be copied and used freely for any purpose but military.
Roedy Green
Canadian Mind Products
#101 - 2536 Wark Street
Victoria, BC Canada
V8T 4G8
tel: (250) 361-9093
roedy g at mindprod dotcom
http://mindprod.com

Version History
1.0 2006-03-07 initial version.
*/
package com.mindprod.common13;

import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
* Converts a JApplet into an Application.
* <p/>
* Created with IntelliJ IDEA.
*
* @author Roedy Green, Canadian Mind Products
* @version 1.0, 2006-03-07
*/
public final class HybridJ
{
// -------------------------- PUBLIC STATIC METHODS
--------------------------

/**
* Fire up the JApplet as an application
*
* @param title title for frame usually TITLE_STRING+
" " + VERSION_STRING
* @param applicationWidth width of frame, usually APPLET_WIDTH
* @param applicationHeight height of frame body, usually
APPLET_HEIGHT
*/
public static void fireup( final JApplet applet,
final String title,
final int applicationWidth,
final int applicationHeight )
{
// fire up JApplet on the Swing Thread
SwingUtilities.invokeLater( new Runnable()
{
/**
* do all swing work on the swing thread.
*/
public void run()
{
JFrame.setDefaultLookAndFeelDecorated( true );

final JFrame frame = new JFrame( title );
frame.setDefaultCloseOperation( JFrame.DO_NOTHING_ON_CLOSE
);
// allow some extra room for the frame title bar.
frame.setSize( applicationWidth + 22, applicationHeight +
32 );
frame.addWindowListener( new WindowAdapter()
{
/**
* Handle request to shutdown.
*
* @param e event giving details of closing.
*/
public void windowClosing( WindowEvent e )
{
applet.stop();
applet.destroy();
System.exit( 0 );
}// end WindowClosing
}// end anonymous class
);// end addWindowListener line

frame.getContentPane().add( applet );
applet.init();
// yes frame, not contentpane.
frame.validate();
frame.setVisible( true );
applet.start();
}// end run
}// end runnable
);
}
}
--

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com
.



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