Source Code : Requests focus unless the component already has focus

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Requests focus unless the component already has focus

   
import java.awt.Component;
import java.awt.KeyboardFocusManager;
/**
 * Copyright (C) 2004 NNL Technology AB
 * Visit www.infonode.net for information about InfoNode(R) 
 * products and how to contact NNL Technology AB.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */


// $Id: ComponentUtil.java,v 1.25 2005/12/04 13:46:04 jesper Exp $


public class Util {

  /**
   * Requests focus unless the component already has focus. For some weird
   * reason calling {@link Component#requestFocusInWindow()}when the
   * component is focus owner changes focus owner to another component!
   *
   * @param component the component to request focus for
   * @return true if the component has focus or probably will get focus,
   *         otherwise false
   */
  public static boolean requestFocus(Component component) {
    /*
     * System.out.println("Owner: " +
     * System.identityHashCode(KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner()) + ", " +
     * System.identityHashCode(component) + ", " +
     * (KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner() ==
     * component));
     */
    return KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner() == component ||
           component.requestFocusInWindow();
  }
}

   
    
    
  

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