WindowMenu.java

package org.freehep.application.mdi;

import java.awt.event.ActionEvent;
import java.util.Iterator;
import java.util.List;

import javax.swing.JMenu;
import javax.swing.JMenuItem;

import org.freehep.application.Application;

/**
 * A menu that includes a list of all active windows.
 * @author Tony Johnson
 */
public class WindowMenu extends JMenu
{
   private int nOriginal = -1;
   private PageManager pm;
   
   public void fireMenuSelected()
   {
      if (nOriginal < 0) nOriginal = getMenuComponentCount();

      MDIApplication app = (MDIApplication) Application.getApplication();
      pm = app.getPageManager();
      app.setSelectedPageManager(pm);
      int nn = 0;
      List pages = pm.pages();
      if (!pages.isEmpty()) addSeparator();
      for (Iterator i = pages.iterator(); i.hasNext(); nn++)
      {
         PageContext context = (PageContext) i.next();
         JMenuItem item = new WindowMenuItem(context,nn);
         add(item);
      }
      super.fireMenuSelected();
   }
   protected void fireMenuDeselected()
   {
      super.fireMenuDeselected();
      // Fix for Freehep-552
      int n = getMenuComponentCount();
      for (int i=n; i>nOriginal; )
      {
	 this.remove(--i);
      }      
   }
   private class WindowMenuItem extends JMenuItem
   {
      WindowMenuItem(PageContext context, int i)
      {
         super(i +" "+ context.getTitle());
         this.context = context;
         setMnemonic('0' + (char) (i));
         setIcon(context.getIcon());
      }
      protected void fireActionPerformed(ActionEvent evt)
      {
         pm.show(context);
      }
      private PageContext context;
   }
}