enableforwardpanel.java

报表设计软件,很好的

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Simba Management Limited and Contributors.
 *
 * 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.
 *
 * ------------------------------
 * EnableForwardPanel.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: EnableForwardPanel.java,v 1.2 2004/04/20 18:54:42 taqua Exp $
 *
 * Changes
 * -------------------------
 * 25.10.2003 : Initial version
 *
 */

package org.jfree.designer.propertyeditors;

import java.awt.Component;
import java.awt.LayoutManager;
import javax.swing.JPanel;

public final class EnableForwardPanel
        extends JPanel
{
  /**
   * Creates a new <code>JPanel</code> with a double buffer and a flow layout.
   */
  public EnableForwardPanel ()
  {
  }

  /**
   * Creates a new <code>JPanel</code> with <code>FlowLayout</code> and the specified
   * buffering strategy. If <code>isDoubleBuffered</code> is true, the <code>JPanel</code>
   * will use a double buffer.
   *
   * @param isDoubleBuffered a boolean, true for double-buffering, which uses additional
   *                         memory space to achieve fast, flicker-free updates
   */
  public EnableForwardPanel (final boolean isDoubleBuffered)
  {
    super(isDoubleBuffered);
  }

  /**
   * Create a new buffered JPanel with the specified layout manager
   *
   * @param layout the LayoutManager to use
   */
  public EnableForwardPanel (final LayoutManager layout)
  {
    super(layout);
  }

  /**
   * Creates a new JPanel with the specified layout manager and buffering strategy.
   *
   * @param layout           the LayoutManager to use
   * @param isDoubleBuffered a boolean, true for double-buffering, which uses additional
   *                         memory space to achieve fast, flicker-free updates
   */
  public EnableForwardPanel (final LayoutManager layout, final boolean isDoubleBuffered)
  {
    super(layout, isDoubleBuffered);
  }

  /**
   * Sets whether or not this component is enabled. A component that is enabled may
   * respond to user input, while a component that is not enabled cannot respond to user
   * input.  Some components may alter their visual representation when they are disabled
   * in order to provide feedback to the user that they cannot take input. <p>Note:
   * Disabling a component does not disable it's children.
   * <p/>
   * <p>Note: Disabling a lightweight component does not prevent it from receiving
   * MouseEvents.
   *
   * @param enabled true if this component should be enabled, false otherwise
   * @see Component#isEnabled
   * @see Component#isLightweight
   */
  public final void setEnabled (final boolean enabled)
  {
    super.setEnabled(enabled);
    synchronized (getTreeLock())
    {
      final Component[] components = getComponents();
      for (int i = 0; i < components.length; i++)
      {
        components[i].setEnabled(enabled);
      }
    }
  }
}