package awtExtExamples ;
/*
 *
 * Copyright (c) 1995 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */

import java.awt.BorderLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.Event;
import java.awt.Font;


import sysExt.* ;
import awtExt.*;

/**
 * A test of menus invoking user defined methods. Also demonstrates
 * how to control event propagation so that an event could be handled
 * anywhere in the container hierarchy. All menuItems 'consume' the
 * ACTION_EVENT, with the exception of the 'vier' menu item, which
 * allows the ACTION_EVENT to propagate upward. User defined methods
 * are registered with MenuItems, Menus, and the MenuBar. In the java
 * console you will see that all menu selections, with the exception 
 * of 'vier',  fire only one user registered method. The 'vier'
 * selection, fires registered methods on the MenuItem, Menu and the 
 * MenuBar level.
 */
public class MenuTest extends Frame {
    Label lbl;
    public MenuTest() {
     super("MenuTest");
     methodRef CheckboxMenuItemCallback = null,
		   MenuItemCallback = null,
		   MenuCallback = null;
     try {

	/*
	** Create callbacks for menu items and menu.
	** Shows how menus can be handled at different levels
	** of containment
	*/
	CheckboxMenuItemCallback = Callback.newRef( this, "CheckboxMenuItemMethod" ) ;
	MenuItemCallback = Callback.newRef( this, "menuItemMethod" ) ;
	MenuCallback = Callback.newRef( this, "menuMethod" ) ;

	/*
	** Create menu bar and attach callback method 'menuBarMethod'.
	** This callback will be invoked ONLY if the event was NOT
	** consumed by a lower level menu component...
	*/
	MenuBar mb = new MenuBar( this, "menuBarMethod" );


	/*
	** Create a menu with a callback method. This method
	** will NOT be called back since the event is consumed
	** by the menu's MenuItems callbacks
	*/
	Menu m = new Menu("English", MenuCallback );
	m.add(new MenuItem("one", MenuItemCallback));
	m.add(new MenuItem("two", MenuItemCallback));
	m.add(new MenuItem("three",MenuItemCallback));
	m.add(new MenuItem("four", MenuItemCallback));

	Menu submenu = new Menu("more", MenuCallback );
	submenu.add(new MenuItem("five", MenuItemCallback));
	submenu.add(new MenuItem("six", MenuItemCallback));
	m.add(submenu);

	Menu submenu2 = new Menu("more", MenuCallback );
	submenu2.add(new MenuItem("seven", MenuItemCallback));
	submenu2.add(new MenuItem("eight", MenuItemCallback));
	submenu.add(submenu2);
	mb.add(m);

	/*
	** Create a menu with a callback method. This method
	** will be called back only when "vier" is pressed.
	** All other choices are consumed by the individual MenuItem's
	** callbacks.
	*/
	m = new Menu("Nederlands", MenuCallback );
	m.add(new MenuItem("een", MenuItemCallback));
	m.add(new MenuItem("twee" , MenuItemCallback));
	m.add(new MenuItem("drie", MenuItemCallback));
	m.add(new MenuItem("vier", MenuItemCallback));
	mb.add(m);

	/*
	** Create another  menu with a callback method. This method
	** will be called back only when "vier" is pressed.
	** All other choices are consumed by the individual MenuItem's
	** callbacks.
	*/
	m = new Menu("Deutsch", MenuCallback );
	m.add(new CheckboxMenuItem("eins", CheckboxMenuItemCallback));
	m.add(new CheckboxMenuItem("twei", CheckboxMenuItemCallback));
	m.add(new CheckboxMenuItem("drie", CheckboxMenuItemCallback));
	m.add(new CheckboxMenuItem("vier", CheckboxMenuItemCallback));
	mb.add(m);

	setMenuBar(mb);

	setLayout(new BorderLayout());
	add( "Center", lbl = new Label("                 The last menu selection will be displayed here.                 ", Label.CENTER)) ;
	setFont(new Font("Helvetica", Font.BOLD, 18));
	move(300, 200);
	resize( 640, 200 );
	show();
 	} catch( Exception e ) { 
		System.out.println( "OOPS!! EXCEPTION!!!" ) ;
		e.printStackTrace() ;
	} ;

   }




   /*
   ** This method is invoked from a MenuItem. If the item is 'vier'
   ** It allows the action event to propagate up the containment
   ** hierarchy.
   */
    public void menuItemMethod( CallbackInfo cb) {
	Event evt = cb.evt ;	
	System.out.println("> In menuItemCallback..." + evt.target.toString()); ;
	lbl.setText(evt.target.toString());
	if( ((MenuItem)(evt.target)).getLabel().equals( "vier" ) )
		cb.processed = false ;
	else  cb.processed = true ;

	}

   /*
   ** This method is invoked from a Menu
   */

    public void menuMethod( CallbackInfo cb ) {
	Event evt = cb.evt ;	
	System.out.println(">> In menuCallback..." + evt.target.toString()); ;
	lbl.setText(evt.target.toString());

	} 



   /*
   ** This method is invoked from the MenuBar
   */
    public void menuBarMethod( CallbackInfo cb ) {
	Event evt = cb.evt ;	
	System.out.println(">>> In menubar callback..." + evt.target.toString()); ;
	lbl.setText(evt.target.toString());

	}





   /*
   ** This method is invoked from a MenuItem. If the item is 'vier'
   ** It allows the action event to propagate up the containment
   ** hierarchy.
   */
    public void CheckboxMenuItemMethod( CallbackInfo cb) {
	Event evt = cb.evt ;	
	System.out.println("> In CheckboxMenuItemCallback..." + evt.target.toString()); ;
	if( ((CheckboxMenuItem)(evt.target)).getLabel().equals( "vier" ) )
		cb.processed = false ;
	else  cb.processed = true ;
	lbl.setText(evt.target.toString());
	
	}

      public static void main(String args[]) {
	new MenuTest();
    }
}