Finds the top level parent JPopupMenu of the given component, it it is contained in the component tree of one. - Java Swing

Java examples for Swing:JMenu

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Description

Finds the top level parent JPopupMenu of the given component, it it is contained in the component tree of one.

Demo Code

/*/* ww  w  .j a  v a  2 s  . c o  m*/
 * UIUtil.java of project jchart2d, utility class for UI / Layout operations. 
 * Copyright (C) 2004 - 2011 Achim Westermann.
 * 
 * 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* If you modify or optimize the code in a useful way please let
 * me know. Achim.Westermann@gmx.de
 */
import java.awt.Component;
import java.awt.Frame;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPopupMenu;

public class Main{
    /**
     * Finds the top level parent <code>JPopupMenu</code> of the given component,
     * it it is contained in the component tree of one.
     * <p>
     * 
     * <code>JPopupMenu</code> trees may contain many sub menu instances.
     * <p>
     * 
     * @param component
     *          a potential sub component of a popup menu.
     * 
     * @return the popup menu of the given component or null.
     */
    public static JPopupMenu findTopLevelPopupMenu(final Component component) {

        JPopupMenu result = null;
        Component comp = component;
        if (component instanceof JPopupMenu) {
            result = ((JPopupMenu) component);
            comp = result.getInvoker();
        } else {
            comp = component.getParent();

        }
        // try to search for a higher popup:
        if (comp != null) {
            JPopupMenu higher = UIUtil.findTopLevelPopupMenu(comp);
            if (higher != null) {
                result = higher;
            }
        }

        return result;
    }
}

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