Here you can find the source of addMouseListenerToHierarchy(JComponent c, MouseListener listener)
public static void addMouseListenerToHierarchy(JComponent c, MouseListener listener)
//package com.java2s; /*//from w w w .jav a 2 s .c o m * Copyright (c) 2014 tabletoptool.com team. * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Public License v3.0 * which accompanies this distribution, and is available at * http://www.gnu.org/licenses/gpl.html * * Contributors: * rptools.com team - initial implementation * tabletoptool.com team - further development */ import java.awt.Component; import java.awt.event.MouseListener; import javax.swing.JComponent; public class Main { public static void addMouseListenerToHierarchy(JComponent c, MouseListener listener) { for (Component comp : c.getComponents()) { comp.addMouseListener(listener); if (comp instanceof JComponent) { addMouseListenerToHierarchy((JComponent) comp, listener); } } } }