annotate src/samer/core_/util/MouseRetarget.java @ 0:bf79fb79ee13

Initial Mercurial check in.

/*
 *	MouseRetarget.java	
 *
 *	Copyright (c) 2000, Samer Abdallah, King's College London.
 *	All rights reserved.
 *
 *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
 *	without even the implied warranty of MERCHANTABILITY or 
 *	FITNESS FOR A PARTICULAR PURPOSE.
 */

package samer.core.util;
import  java.awt.*;
import  java.awt.event.*;


/**
		This is a mouse event handler that makes
		a component effectively invisible to
		mouse clicks by routing a events through
		to the parent container. 
 */
		
public class MouseRetarget extends MouseAdapter
{
	private void retarget(MouseEvent e)
	{
		if (!e.isConsumed()) { // no point otherwise
			Component c=e.getComponent();
			Component parent=c.getParent();

			if (parent!=null) {
				Point origin=c.getLocation();
		
				// Must make new event look as if it
				// was generated by parent

				MouseEvent ee = new MouseEvent(
					parent,
					e.getID(),	
					e.getWhen(), 
					e.getModifiers(),
					e.getX() + origin.x,
					e.getY() + origin.y,
					e.getClickCount(),                  
					e.isPopupTrigger());

				parent.dispatchEvent(ee);
			}
		}
	}

	public void mouseClicked(MouseEvent e) { retarget(e); }
	public void mousePressed(MouseEvent e) { retarget(e); }
	public void mouseReleased(MouseEvent e) { retarget(e); }

	// This one static object can handle all the mouse
	// event redirection for everyone

	public static final MouseListener listener=new MouseRetarget();
	public static void mouseInvisibilityFor(Component c) {
		c.addMouseListener(listener);
	}
}