comparison 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);
+	}
+}
+
+
+