MDITest.java

package org.freehep.util.commanddispatcher.test;

import java.awt.Dimension;
import java.beans.PropertyVetoException;

import javax.swing.JComponent;
import javax.swing.JDesktopPane;
import javax.swing.JInternalFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

import org.freehep.swing.test.TestFrame;
import org.freehep.util.commanddispatcher.CommandProcessor;
import org.freehep.util.commanddispatcher.CommandSourceAdapter;
import org.freehep.util.commanddispatcher.CommandTargetManager;


/**
 * This class illustrates the use of CommandProcessors in a simple
 * MDI application. There are three classes of command processors
 * in this sample application.
 * <ol>
 * <li>The MDICommandProcessor in the main class, which is always
 * active and deals with creating new windows, and exiting the application.
 * <li>The PageCommandProcessor in each page, which is active only
 * when its page is the selected page.
 * <li>The PrintingPageCommandProcessor, which extends PageCommandProcessor
 * and provides support for the print command in PrintablePages.
 * </ol>
 */
public class MDITest extends TestFrame
{
   private CommandTargetManager manager;
   private JDesktopPane desktop;

   public void addToMenuBar(JMenuBar bar)
   {
      manager = new CommandTargetManager();
      manager.add(new MDICommandProcessor());
      bar.add(new FileMenu());
      manager.start();
   }

   public JComponent createComponent()
   {
      desktop = new JDesktopPane();
      desktop.setPreferredSize(new Dimension(600, 400));
      return desktop;
   }

   public static void main(String[] argv)
   {
      new MDITest();
   }

   public class MDICommandProcessor extends CommandProcessor
   {
      public void onExit()
      {
         quit();
      }

      public void onNewNonPrintablePage()
      {
         JInternalFrame f = new NonPrintablePage(manager);
         desktop.add(f);
         f.setVisible(true);
      }

      public void onNewPrintablePage()
      {
         JInternalFrame f = new PrintablePage(manager);
         desktop.add(f);
         f.setVisible(true);
      }
      public void onDump()
      {
         manager.dump(System.out);
      }
   }

   class FileMenu extends JMenu
   {
      FileMenu()
      {
         super("File");

         add("New Printable Page");
         add("New Non Printable Page");
         add("Close");
         addSeparator();
         add("Print");
         addSeparator();
         add("Dump");
         addSeparator();
         add("Exit");
      }

      public JMenuItem add(String name)
      {
         JMenuItem item = new JMenuItem(name);
         manager.add(new CommandSourceAdapter(item));
         super.add(item);
         return item;
      }
   }
}


class PrintablePage extends NonPrintablePage
{
   PrintablePage(CommandTargetManager manager)
   {
      super("Printable", manager);
   }

   protected CommandProcessor createCommandProcessor()
   {
      return new PrintingPageCommandProcessor();
   }

   public class PrintingPageCommandProcessor extends PageCommandProcessor
   {
      public void onPrint()
      {
         System.out.println("Print!");
      }
   }
}


class NonPrintablePage extends JInternalFrame
{
   private CommandProcessor pageCommandProcessor = createCommandProcessor();
   private CommandTargetManager manager;

   NonPrintablePage(CommandTargetManager manager)
   {
      this("Non-printable", manager);
   }

   NonPrintablePage(String title, CommandTargetManager manager)
   {
      super(title);
      this.manager = manager;
      setSize(300, 300);
   }

   public void setSelected(boolean isSelected) throws PropertyVetoException
   {
      super.setSelected(isSelected);
      if (isSelected)
         manager.add(pageCommandProcessor);
      else
         manager.remove(pageCommandProcessor);
   }

   protected CommandProcessor createCommandProcessor()
   {
      return new PageCommandProcessor();
   }

   public class PageCommandProcessor extends CommandProcessor
   {
      public void onClose()
      {
         dispose();
      }
   }
}