exportaction.java

来自「swing编写的库存管理程序。毕业设计类」· Java 代码 · 共 177 行

/**
 * ========================================
 * JFreeReport : a free Java report library
 * ========================================
 *
 * Project Info:  http://www.jfree.org/jfreereport/index.html
 * Project Lead:  Thomas Morgner;
 *
 * (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.
 *
 * -----------------
 * ExportAction.java
 * -----------------
 * (C)opyright 2003, by Thomas Morgner and Contributors.
 *
 * Original Author:  Thomas Morgner;
 * Contributor(s):   David Gilbert (for Simba Management Limited);
 *
 * $Id: ExportAction.java,v 1.3 2003/11/15 18:22:28 taqua Exp $
 *
 * Changes
 * --------
 * 25-Feb-2003 : Added standard header and Javadocs (DG);
 *
 */
package org.jfree.report.modules.gui.base;

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

import org.jfree.report.JFreeReport;
import org.jfree.report.modules.gui.base.components.ActionDowngrade;
import org.jfree.report.util.Log;

/**
 * An export action that works with any class that implements
 * the {@link org.jfree.report.modules.gui.base.ExportPlugin} interface.
 *
 * @author Thomas Morgner.
 */
public class ExportAction extends AbstractAction implements ActionDowngrade, Runnable
{
  private class ExportPluginListener implements PropertyChangeListener
  {
    /**
     * 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 void propertyChange(PropertyChangeEvent evt)
    {
      if ("enabled".equals(evt.getPropertyName()))
      {
        setEnabled(plugin.isEnabled());
      }
    }
  }

  /** The export plug-in. */
  private ExportPlugin plugin;

  /** The report. */
  private JFreeReport report;

  /**
   * Defines an <code>Action</code> object with a default description string and default icon.
   *
   * @param plugin  the export plug-in.
   */
  public ExportAction(final ExportPlugin plugin)
  {
    if (plugin == null)
    {
      throw new NullPointerException();
    }

    this.plugin = plugin;
    plugin.addPropertyChangeListener(new ExportPluginListener());
    if (plugin.getAcceleratorKey() != null)
    {
      putValue(ActionDowngrade.ACCELERATOR_KEY, plugin.getAcceleratorKey());
    }
    if (plugin.getDisplayName() != null)
    {
      putValue(ExportAction.NAME, plugin.getDisplayName());
    }
    if (plugin.getSmallIcon() != null)
    {
      putValue(ExportAction.SMALL_ICON, plugin.getSmallIcon());
    }
    if (plugin.getLargeIcon() != null)
    {
      putValue("ICON24", plugin.getLargeIcon());
    }
    if (plugin.getMnemonicKey() != null)
    {
      putValue(ActionDowngrade.MNEMONIC_KEY, plugin.getMnemonicKey());
    }
    if (plugin.getShortDescription() != null)
    {
      putValue(ExportAction.SHORT_DESCRIPTION, plugin.getShortDescription());
    }
  }

  /**
   * Returns the report.
   *
   * @return The report.
   */
  public JFreeReport getReport()
  {
    return report;
  }

  /**
   * Sets the report.
   *
   * @param report  the report.
   */
  public void setReport(final JFreeReport report)
  {
    this.report = report;
  }

  /**
   * Exports the current report using the installed export plug-in.
   *
   * @param e  the event.
   */
  public void actionPerformed(final ActionEvent e)
  {
    if (plugin.isControlPlugin() == false)
    {
      SwingUtilities.invokeLater(this);
    }
    else
    {
      run();
    }
  }

  /**
   * When an object implementing interface <code>Runnable</code> is used
   * to create a thread, starting the thread causes the object's
   * <code>run</code> method to be called in that separately executing
   * thread.
   * <p>
   * The general contract of the method <code>run</code> is that it may
   * take any action whatsoever.
   *
   * @see     java.lang.Thread#run()
   */
  public void run()
  {
    final boolean retval = plugin.performExport(report);
    if (plugin.isControlPlugin() == false && retval == false)
    {
      Log.info("Export failed: " + plugin.getFailureDescription());
    }
  }
}