/*
 * @(#)MotifMenuUI.java	1.27 00/02/02
 *
 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */
package com.sun.java.swing.plaf.motif;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.border.*;
import javax.swing.plaf.basic.*;


import javax.swing.plaf.basic.BasicMenuUI;
import javax.swing.plaf.basic.BasicGraphicsUtils;

/**
 * A Motif L&F implementation of MenuUI.  
 * <p>
 *
 * @version 1.27 02/02/00
 * @author Georges Saab
 * @author Rich Schiavi
 */
public class MotifMenuUI extends BasicMenuUI
{

    public static ComponentUI createUI( JComponent x ) {
	return new MotifMenuUI();
    }
 
// These should not be necessary because BasicMenuUI does this,
// and this class overrides createChangeListener.
//    protected void installListeners() {
//	super.installListeners();
//        changeListener = createChangeListener(menuItem);
//        menuItem.addChangeListener(changeListener);	
//    }
//    
//    protected void uninstallListeners() {
//	super.uninstallListeners();
//	menuItem.removeChangeListener(changeListener);
//    }

    protected ChangeListener createChangeListener(JComponent c) {
        return new MotifChangeHandler((JMenu)c, this);
    }

    public void paint(Graphics g, JComponent c){
	MotifGraphicsUtils.paintMenuItem(g,c,checkIcon,arrowIcon,
					 selectionBackground, selectionForeground,
					 defaultTextIconGap);
    }

    private boolean popupIsOpen(JMenu m,MenuElement me[]) {
        int i;
        JPopupMenu pm = m.getPopupMenu();

        for(i=me.length-1;i>=0;i--) {
            if(me[i].getComponent() == pm)
                return true;
        }
        return false;
    }

    protected MouseInputListener createMouseInputListener(JComponent c) {
	return new MouseInputHandler();
    }

    public class MotifChangeHandler extends ChangeHandler {
	public MotifChangeHandler(JMenu m, MotifMenuUI ui) {
	    super(m, ui);
	}
	

	public void stateChanged(ChangeEvent e) {
	    JMenuItem c = (JMenuItem)e.getSource();
	    if (c.isArmed() || c.isSelected()) {
		c.setBorderPainted(true);
		// c.repaint();
	    } else {
		c.setBorderPainted(false);
	    }

	    super.stateChanged(e);
	}
    }

    protected class MouseInputHandler implements MouseInputListener {
	public void mouseClicked(MouseEvent e) {}
	public void mousePressed(MouseEvent e) {
	    MenuSelectionManager manager = MenuSelectionManager.defaultManager();
	    JMenu menu = (JMenu)e.getComponent();
            if(menu.isEnabled()) {
		if(menu.isTopLevelMenu()) {
		    if(menu.isSelected()) {
			manager.clearSelectedPath();
		    } else {
			Container cnt = menu.getParent();
			if(cnt != null && cnt instanceof JMenuBar) {
			    MenuElement me[] = new MenuElement[2];
			    me[0]=(MenuElement)cnt;
			    me[1]=menu;
			    manager.setSelectedPath(me);
			}
		    }
		}
		
		MenuElement path[] = getPath();
		MenuElement newPath[] = new MenuElement[path.length+1];
		System.arraycopy(path,0,newPath,0,path.length);
		newPath[path.length] = menu.getPopupMenu();
		manager.setSelectedPath(newPath);
		
	    }
	}

	public void mouseReleased(MouseEvent e) {
	    MenuSelectionManager manager = 
		MenuSelectionManager.defaultManager();
	    JMenuItem menuItem = (JMenuItem)e.getComponent();
	    Point p = e.getPoint();
	    if(!(p.x >= 0 && p.x < menuItem.getWidth() &&
		 p.y >= 0 && p.y < menuItem.getHeight())) {
		manager.processMouseEvent(e);
	    }
	}
	public void mouseEntered(MouseEvent e) {}
	public void mouseExited(MouseEvent e) {}
	public void mouseDragged(MouseEvent e) {
	    MenuSelectionManager.defaultManager().processMouseEvent(e);
	}
	public void mouseMoved(MouseEvent e) { }
    }

}