samer@0: /*
samer@0:  *	WindowApplet.java	
samer@0:  *
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.applet;
samer@0: 
samer@0: import  java.awt.*;
samer@0: import  java.awt.event.*;
samer@0: import  java.util.Random;
samer@0: import  java.net.*;
samer@0: import  samer.core.*;
samer@0: import  samer.core.util.*;
samer@0: import  samer.core.util.heavy.*;
samer@0: import  samer.tools.*;
samer@0: 
samer@0: //import  samer.core.util.common.Tools;
samer@0: 
samer@0: public class WindowApplet extends JApplet implements Shell.Window, ActionListener
samer@0: {
samer@0: 	private	WindowListener	wl=null;
samer@0: 
samer@0: 	public void init()
samer@0: 	{
samer@0: 		super.init();
samer@0: 
samer@0: 		JAppletShell.registerWindow(this,name);
samer@0: 
samer@0: 		PopupMenu p=new PopupMenu( "Frame");
samer@0: 		p.addActionListener(this);
samer@0: 		p.add("recycle");
samer@0: 		add(p);
samer@0: 		// addContainerListener(this); check for empty? see AppShell
samer@0: 		addMouseListener(new PopupHandler(p,true));
samer@0: 	}
samer@0: 
samer@0: 	public void actionPerformed(ActionEvent e) {
samer@0: 		if (e.getActionCommand().equals("recycle")) {
samer@0: 			// simulate window closing behaviour by
samer@0: 			// calling listeners - this REQUESTS that
samer@0: 			// the window be released gracefully
samer@0: 			if (wl!=null) {
samer@0: 				Shell.trace("firing windowClosing event");
samer@0: 				wl.windowClosing(new WindowEvent(
samer@0: 					JAppletShell.dummyFrame(),
samer@0: 					WindowEvent.WINDOW_CLOSING));
samer@0: 			}
samer@0: 		}
samer@0: 	}
samer@0: 	
samer@0: 	public void start()
samer@0: 	{
samer@0: 		super.start();
samer@0: 
samer@0: 		if (name!=null) {
samer@0: 			if (name.equals("exposed")) JAppletShell.expose();
samer@0: 		}
samer@0: 
samer@0: 		// if we need to have access to private properties:
samer@0: 		// Manager props = new Manager(this);
samer@0: 	}
samer@0: 
samer@0: 	private boolean destroying=false;
samer@0: 
samer@0: 	public void destroy() 
samer@0: 	{ 
samer@0: 		destroying=true;
samer@0: 
samer@0: 		if (wl!=null) {
samer@0: 			Shell.trace("firing windowClosing event");
samer@0: 
samer@0: 			// this may precipitate component removals or a window dispose
samer@0: 			// we should ignore any dispose requests we get - that's
samer@0: 			// why we set destroying=true;
samer@0: 			wl.windowClosing(new WindowEvent(
samer@0: 				JAppletShell.dummyFrame(),
samer@0: 				WindowEvent.WINDOW_CLOSING));
samer@0: 		}
samer@0: 
samer@0: 		wl=null; // forget about window listeners
samer@0: 
samer@0: 		// window is no longer available for use
samer@0: 		JAppletShell.deregisterWindow(this,name);
samer@0: 
samer@0: 		// after this, if components are removed, this may
samer@0: 		// precipitate a call to dispose if any container
samer@0: 		// listeners are registered - we leave destroying=true
samer@0: 		// so that nothing happens.
samer@0: 		super.destroy();
samer@0: 	}
samer@0: 
samer@0: 	public Container container() { return this; }
samer@0: 	public synchronized void addWindowListener(WindowListener l) {
samer@0: 		Shell.trace("adding window listener");
samer@0: 		wl = AWTEventMulticaster.add(wl,l);     
samer@0: 	}
samer@0: 
samer@0: 	public void expose() { validate(); }
samer@0: 	public void dispose() { 
samer@0: 		if (!destroying) {
samer@0: 			removeAll();
samer@0: 			wl=null; // forget about listeners
samer@0: 
samer@0: 			// window is now available for reuse
samer@0: 			JAppletShell.registerWindow(this,name);
samer@0: 		}
samer@0: 	}
samer@0: }