package org.minetti.astrodevice.client.gui.menu;
   
   import java.util.ArrayList;
   import java.util.List;
   import org.eclipse.swt.SWT;
   import org.eclipse.swt.widgets.Event;
   import org.eclipse.swt.widgets.Listener;
   import org.eclipse.swt.widgets.Menu;
   import org.eclipse.swt.widgets.MenuItem;
  import org.eclipse.swt.widgets.Shell;
  import org.minetti.astrodevice.client.business.process.TelescopeProcess;
  import org.minetti.astrodevice.client.i18n.I18n;
  import org.minetti.astrodevice.common.object.Entity;
  
  /**
   * Menu of <b>telescope</b>.
   * @author Jean-Philippe MINETTI
   */
  public final class SwtTelescopeMenu
  {
  
     /**
      * Listener for each sub-menu showing.
      */
     protected final class ShowListener
              implements Listener
     {
  
        /**
         * <code>MenuItem</code> list of telescope selections.
         */
        private final List<MenuItem> menuItemList = new ArrayList<MenuItem> ();
  
        /**
         * {@inheritDoc}
         * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
         */
        public void handleEvent (final Event event)
        {
  
           // Removing
           for (final MenuItem menuItem : this.menuItemList) {
              menuItem.dispose ();
           }
           this.menuItemList.clear ();
  
           // Separator
           this.menuItemList.add (new MenuItem (SwtTelescopeMenu.this.telescopeMenu, SWT.SEPARATOR));
  
           // Telescope selections
           final Entity selectedTelescope = SwtTelescopeMenu.this.telescopeProcess.getSelectedTelescope ();
           final List<Entity> entityList = SwtTelescopeMenu.this.telescopeProcess.getTelescopeList ();
           for (final Entity entity : entityList) {
              final MenuItem menuItem = new MenuItem (SwtTelescopeMenu.this.telescopeMenu, SWT.RADIO);
              menuItem.setText (entity.getName ());
              menuItem.addListener (SWT.Selection, new TelescopeSelectionListener (entity));
              menuItem.setSelection ((selectedTelescope != null) && (selectedTelescope.getId () == entity.getId ()));
              this.menuItemList.add (menuItem);
           }
  
        }
  
     }
  
     /**
      * Listener for each telescope item selection.
      */
     protected final class TelescopeSelectionListener
              implements Listener
     {
  
        /**
         * Telescope (as entity).
         */
        private final Entity entity;
  
        /**
         * Constructor.
         * @param entity Telescope (as entity).
         */
        protected TelescopeSelectionListener (final Entity entity)
        {
           super ();
           this.entity = entity;
        }
  
        /**
         * {@inheritDoc}
         * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
         */
        public void handleEvent (final Event event)
        {
           final MenuItem menuItem = (MenuItem) event.widget;
           if (menuItem.getSelection ()) {
              SwtTelescopeMenu.this.telescopeProcess.setSelectedTelescope (this.entity);
  
              // TODO changement de télescope
  
           }
       }
 
    }
 
    /**
     * Process on telescopes.
     */
    protected final TelescopeProcess telescopeProcess = new TelescopeProcess ();
 
    /**
     * Menu of telescope.
     */
    protected Menu telescopeMenu;
 
    /**
     * Builds the menu of telescope.
     * @param shell SWT shell.
     * @param contextMenu Context menu.
     */
    public void build (final Shell shell, final Menu contextMenu)
    {
 
       // Sub-menu
       MenuItem menuItem = new MenuItem (contextMenu, SWT.CASCADE);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.text"));
       this.telescopeMenu = new Menu (shell, SWT.DROP_DOWN);
       this.telescopeMenu.addListener (SWT.Show, new ShowListener ());
       menuItem.setMenu (this.telescopeMenu);
 
       // Tour
       buildTour (shell);
 
       // Tracking
       buildTracking (shell);
 
       // Separator
       menuItem = new MenuItem (this.telescopeMenu, SWT.SEPARATOR);
 
       // Scope parked
       menuItem = new MenuItem (this.telescopeMenu, SWT.CHECK);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.parked.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // Installation wizard
       menuItem = new MenuItem (this.telescopeMenu, SWT.PUSH);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.installation.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // Alignment/Sync
       buildAlignment (shell);
 
       // Separator
       menuItem = new MenuItem (this.telescopeMenu, SWT.SEPARATOR);
 
       // Limits enabled
       menuItem = new MenuItem (this.telescopeMenu, SWT.CHECK);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.limits.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // Pulse guide settings
       menuItem = new MenuItem (this.telescopeMenu, SWT.PUSH);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.pulseguide.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // ST4 port guide settings
       menuItem = new MenuItem (this.telescopeMenu, SWT.PUSH);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.st4guide.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // PEC settings
       menuItem = new MenuItem (this.telescopeMenu, SWT.PUSH);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.pec.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
       // Drift compensation settings
       menuItem = new MenuItem (this.telescopeMenu, SWT.PUSH);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.driftcompensation.text"));
       // menuItem.addListener (SWT.Selection, new ObservingSiteSelectionListener (entity));
 
    }
 
    /**
     * Builds the menu of telescope/tour.
     * @param shell SWT shell.
     */
    private void buildTour (final Shell shell)
    {
 
       // Sub-menu
       MenuItem menuItem = new MenuItem (this.telescopeMenu, SWT.CASCADE);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.tour.text"));
       final Menu subMenu = new Menu (shell, SWT.DROP_DOWN);
       menuItem.setMenu (subMenu);
 
       // TODO
 
    }
 
    /**
     * Builds the menu of telescope/tracking.
     * @param shell SWT shell.
     */
    private void buildTracking (final Shell shell)
    {
 
       // Sub-menu
       MenuItem menuItem = new MenuItem (this.telescopeMenu, SWT.CASCADE);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.tracking.text"));
       final Menu subMenu = new Menu (shell, SWT.DROP_DOWN);
       menuItem.setMenu (subMenu);
 
       // TODO
 
    }
 
    /**
     * Builds the menu of telescope/alignment.
     * @param shell SWT shell.
     */
    private void buildAlignment (final Shell shell)
    {
 
       // Sub-menu
       MenuItem menuItem = new MenuItem (this.telescopeMenu, SWT.CASCADE);
       menuItem.setText (I18n.getGui ().getString ("menu.telescope.alignment.text"));
       final Menu subMenu = new Menu (shell, SWT.DROP_DOWN);
       menuItem.setMenu (subMenu);
 
       // TODO
 
    }
 
 
 }