Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * $Id: SwingXUtilities.java,v 1.11 2009/04/02 20:35:54 kschaefe Exp $
 *
 * Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

import java.awt.Component;

import javax.swing.JPopupMenu;

public class Main {
    /**
     * An improved version of
     * {@link SwingUtilities#getAncestorOfClass(Class, Component)}. This method
     * traverses {@code JPopupMenu} invoker and uses generics to return an
     * appropriately typed object.
     * 
     * @param <T>
     *            the type of ancestor to find
     * @param clazz
     *            the class instance of the ancestor to find
     * @param c
     *            the component to start the search from
     * @return an ancestor of the correct type or {@code null} if no such
     *         ancestor exists. This method also returns {@code null} if any
     *         parameter is {@code null}.
     */
    @SuppressWarnings("unchecked")
    public static <T> T getAncestor(Class<T> clazz, Component c) {
        if (clazz == null || c == null) {
            return null;
        }

        Component parent = c.getParent();

        while (parent != null && !(clazz.isInstance(parent))) {
            parent = c instanceof JPopupMenu ? ((JPopupMenu) c).getInvoker() : c.getParent();
        }

        return (T) parent;
    }
}