/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

	Copyright (c) John D. Mitchell, 1996 -- All Rights Reserved

PROJECT:	JavaWorld
MODULE:		Tips & Tricks
FILE:		CascadeMenus.java

AUTHOR:		John D. Mitchell, Jul 19, 1996

REVISION HISTORY:
	Name	Date		Description
	----	----		-----------
	JDM	96.07.19   	Initial version.

DESCRIPTION:
	This file defines a Java User Interface which highlights the
	creation of cascading menus.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/


import	java.awt.*;


public class CascadeMenus extends Frame
{
    public static void main (String args[])
    {
	Frame frame = new CascadeMenus ();
	frame.resize (250,250);
	frame.show ();
    }
	

    // Build me!
    public CascadeMenus ()
    {
	MenuBar	menuBar;
	Menu	menu;
	Menu	cascadeMenu1;
	Menu	cascadeMenu2;

	// I am not a "Hello, World" program!
	setTitle ("JavaWorld Cascading Menus Tip");

	// Build toplevel menubar.
	menuBar = new MenuBar();

	// Build toplevel first child.
	menu = new Menu ("File");

	// First child of "File" menu is a pull-right style menu.
	cascadeMenu1 = new Menu ("Open");
	cascadeMenu1.add (new MenuItem ("New"));
	cascadeMenu1.add (new MenuItem ("Template"));
	menu.add (cascadeMenu1);

	// Second child is a doubly-cascaded menu.
	cascadeMenu1 = new Menu ("Nuke");

	cascadeMenu2 = new Menu ("Files");
	cascadeMenu2.add (new MenuItem ("Save"));
	cascadeMenu2.add (new MenuItem ("Save As"));
	cascadeMenu2.add (new MenuItem ("Delete"));
	cascadeMenu1.add (cascadeMenu2);

	cascadeMenu2 = new Menu ("Food");
	cascadeMenu2.add (new MenuItem ("High"));
	cascadeMenu2.add (new MenuItem ("Medium"));
	cascadeMenu2.add (new MenuItem ("Low"));
	cascadeMenu1.add (cascadeMenu2);

	menu.add (cascadeMenu1);

	// Something a bit more normal.
	menu.addSeparator ();
	menu.add (new MenuItem ("Quit"));

	// Add first child to menu bar.
	menuBar.add (menu);


	// Build toplevel second child.
	menu = new Menu ("Options");

	// Nothing much here.
	menu.add (new MenuItem ("RTFM"));
	
	// Add second child to menu bar.
	menuBar.add (menu);

	// Make it actually happen!
	setMenuBar (menuBar);
    }		// End of CascadeMenus constructor.


    // Handle Window events.
    public boolean handleEvent (Event event)
    {
	// We only care about quitting the app.
	if ((Event.WINDOW_DESTROY == event.id) &&
	    (this == event.target))
	    {
	    System.exit (0);
	    }

	// Pass on all other events for normal processing.
	return (super.handleEvent (event));
    }


    // Handle user actions.
    public boolean action (Event event, Object target)
    {
	// We only care about quitting the app.
	// Was the action directed at the "Quit" menu selction?
	if ((event.target instanceof MenuItem) &&
	    (target.equals ("Quit")))
	    {
	    System.exit (0);
	    }

	// Otherwise, propagate the action upwards.
	return (false);
    }
    
}