IM2LEARNMenu

The IM2LEARNMenu class is an interface that needs to be implemented if the class is to be appended to either the ncsa.Im2Learn.main menu or the panel. It returns a list of menu entries that will be added to the ncsa.Im2Learn.main menu bar. If the menuitem is a menu it will be only added to the menu if it does not already exist. If it exists the menu entries are appended to then end of the existing menu.

// ------------------------------------------------------------
// IM2LEARNMenu implementation
// ------------------------------------------------------------
/**
 * Store the reference to the imagepanel for later use.
 * The imagepanel passed in as argument is the
 * imagepanel to which this tools is associated.
 */
public void setImagePanel(ImagePanel imagepanel) {
  this.imagepanel = imagepanel;
}

/**
 * For this tool there is no operation that works on the
 * imagepanel directly and thus we return null
 * indicating that no menu entries need to be created on
 * the panel.
 */
public JMenuItem[] getPanelMenuItems() {
  return null;
}

/**
 * Create a menu entry called Tools, and attach a
 * submenu entry to this for this class, called swap. If
 * the user selects this class
 */
public JMenuItem[] getMainMenuItems() {
  JMenu menu = new JMenu("Tools");
  JMenuItem item = new JMenuItem(new AbstractAction("Swap") {
    public void actionPerformed(ActionEvent e) {
      if (!isVisible()) {
        Window win = SwingUtilities.getWindowAncestor(imagepanel);
        setLocationRelativeTo(win);
        setVisible(true);
      }
      toFront();
    }
  });
  menu.add(item);

  return new JMenuItem[] { menu };
}

/**
 * When a new image is loaded make sure that the current
 * swapped image is removed, i.e. perform a reset. Only
 * need to reset the image if this frame is visible.
 */
public void imageUpdated(ImageUpdateEvent event) {
  if (!isVisible()) {
    return;
  }

  if (event.getId() == ImageUpdateEvent.NEW_IMAGE) {
    reset();
  }
}