iconutil.java

修正了jdk1.6中对托盘事件产生异常的bug.

/*
 * 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: IconUtil.java,v 1.5 2005/02/16 11:28:11 jesper Exp $
package net.infonode.gui.icon;

import javax.swing.*;
import java.awt.*;

/**
 * @author $Author: jesper $
 * @version $Revision: 1.5 $
 */
public class IconUtil {
  private IconUtil() {
  }

  public static final Icon SMALL_ICON = new Icon() {
    public int getIconHeight() {
      return 1;
    }

    public int getIconWidth() {
      return 1;
    }

    public void paintIcon(Component c, Graphics g, int x, int y) {
    }
  };

  public static Icon copy(final Icon icon) {
    return new Icon() {
      public void paintIcon(Component c, Graphics g, int x, int y) {
        icon.paintIcon(c, g, x, y);
      }

      public int getIconWidth() {
        return icon.getIconWidth();
      }

      public int getIconHeight() {
        return icon.getIconHeight();
      }
    };
  }

  public static Icon getIcon(Object object) {
    return object == null ? null :
           object instanceof AbstractButton ? (Icon) ((AbstractButton) object).getIcon() :
           object instanceof Action ? (Icon) ((Action) object).getValue(Action.SMALL_ICON) :
           object instanceof IconProvider ? ((IconProvider) object).getIcon() : null;
  }

  public static int getIconWidth(Object object) {
    Icon icon = getIcon(object);
    return icon == null ? 0 : icon.getIconWidth();
  }

  public static int getIconHeight(Object object) {
    Icon icon = getIcon(object);
    return icon == null ? 0 : icon.getIconHeight();
  }

  public static int getMaxIconWidth(Object[] objects) {
    int max = 0;

    for (int i = 0; i < objects.length; i++) {
      int width = getIconWidth(objects[i]);

      if (width > max) {
        max = width;
      }
    }

    return max;
  }

}