zoomselecthandler.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.
 *
 * ------------------------------
 * ZoomSelectAction.java
 * ------------------------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ZoomSelectHandler.java,v 1.2 2004/04/20 18:54:55 taqua Exp $
 *
 * Changes
 * -------------------------
 * 25.10.2003 : Initial version
 *
 */

package org.jfree.designer.visualeditor.actions;

import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.AbstractAction;
import javax.swing.JComboBox;

import org.jfree.designer.visualeditor.VisualEditPanel;

public final class ZoomSelectHandler
        extends AbstractAction
        implements PropertyChangeListener
{
  private final VisualEditPanel visualEditPanel;
  private final JComboBox zoomSelector;

  /**
   * Defines an Action object with a default description string and default icon.
   */
  public ZoomSelectHandler (final VisualEditPanel visualEditPanel,
                            final JComboBox zoomSelector)
  {
    this.zoomSelector = zoomSelector;
    this.visualEditPanel = visualEditPanel;
    this.visualEditPanel.addPropertyChangeListener("zoomLevel", this);
  }

  /**
   * Invoked when an action occurs.
   */
  public final void actionPerformed (final ActionEvent e)
  {
    final int index = zoomSelector.getSelectedIndex();
    if (index != -1)
    {
      visualEditPanel.setZoomLevel(index);
    }
  }

  /**
   * This method gets called when a bound property is changed.
   *
   * @param evt A PropertyChangeEvent object describing the event source and the property
   *            that has changed.
   */
  public final void propertyChange (final PropertyChangeEvent evt)
  {
    zoomSelector.setSelectedIndex(visualEditPanel.getZoomLevel());
  }
}