Get Owning Frame for Component : Frame « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. Frame

/*
 * Copyright (C) 2001-2004 Colin Bell
 * colbell@users.sourceforge.net
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


import java.awt.Component;
import java.awt.Frame;

import javax.swing.SwingUtilities;

/**
 * Common GUI utilities accessed via static methods.
 * 
 * @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
 */
public class GUIUtils {

  /**
   * Return the owning <CODE>Frame</CODE> for the passed component of <CODE>null</CODE>
   * if it doesn't have one.
   * 
   * @throws IllegalArgumentException
   *           If <TT>wind</TT> is <TT>null</TT>.
   */
  public static Frame getOwningFrame(Component comp) {
    if (comp == null) {
      throw new IllegalArgumentException("null Component passed");
    }

    if (comp instanceof Frame) {
      return (Frame) comp;
    }
    return getOwningFrame(SwingUtilities.windowForComponent(comp));
  }
}