org.eclipse.swt.events.MenuAdapter#org.eclipse.swt.events.MenuEvent源码实例Demo

private void refactorMenuShown(IMenuManager refactorSubmenu) {
	// we know that we have an MenuManager since we created it in
	// addRefactorSubmenu.
	Menu menu = ((MenuManager) refactorSubmenu).getMenu();
	menu.addMenuListener(new MenuAdapter() {
		@Override
		public void menuHidden(MenuEvent e) {
			refactorMenuHidden();
		}
	});
	ITextSelection textSelection = (ITextSelection) fEditor.getSelectionProvider().getSelection();
	// JavaTextSelection javaSelection= new
	// JavaTextSelection(getEditorInput(), getDocument(),
	// textSelection.getOffset(), textSelection.getLength());

	for (Iterator<SelectionDispatchAction> iter = fActions.iterator(); iter.hasNext();) {
		SelectionDispatchAction action = iter.next();
		action.update(textSelection);
	}
	refactorSubmenu.removeAll();
	if (fillRefactorMenu(refactorSubmenu) == 0)
		refactorSubmenu.add(fNoActionAvailable);
}
 

private void refactorMenuShown(IMenuManager refactorSubmenu) {
	// we know that we have an MenuManager since we created it in
	// addRefactorSubmenu.
	Menu menu= ((MenuManager)refactorSubmenu).getMenu();
	menu.addMenuListener(new MenuAdapter() {
		@Override
		public void menuHidden(MenuEvent e) {
			refactorMenuHidden();
		}
	});
	ITextSelection textSelection= (ITextSelection)fEditor.getSelectionProvider().getSelection();
	JavaTextSelection javaSelection= new JavaTextSelection(getEditorInput(), getDocument(), textSelection.getOffset(), textSelection.getLength());

	for (Iterator<SelectionDispatchAction> iter= fActions.iterator(); iter.hasNext(); ) {
		SelectionDispatchAction action= iter.next();
		action.update(javaSelection);
	}
	refactorSubmenu.removeAll();
	if (fillRefactorMenu(refactorSubmenu) == 0)
		refactorSubmenu.add(fNoActionAvailable);
}
 

protected void initMenu(Menu menu) {
	menu.addMenuListener(new MenuAdapter() {
		@Override
		public void menuShown(MenuEvent e) {
			Menu m= (Menu) e.widget;
			MenuItem[] items= m.getItems();
			for (int i= 0; i < items.length; i++) {
				items[i].dispose();
			}
			fillMenu(m);
		}
	});
}
 

protected void initMenu() {
	fMenu.addMenuListener(new MenuAdapter() {
		@Override
		public void menuShown(MenuEvent e) {
			Menu m = (Menu)e.widget;
			MenuItem[] items = m.getItems();
			for (int i=0; i < items.length; i++) {
				items[i].dispose();
			}
			fillMenu(m);
		}
	});
}
 

private void initMenu(Menu fMenu) {     
    fMenu.addMenuListener(new MenuAdapter() {
        public void menuShown(MenuEvent e) {                
            Menu m = (Menu) e.widget;
            MenuItem[] items = m.getItems();
            for (int i = 0; i < items.length; i++) {
                items[i].dispose();
            }
            fillMenu(m);                
        }
    });
}
 

public static void linkCommand(Do command, AcceleratedMenuItem menuItem) {
	menuDoMapping.put(command, menuItem);
	menuItem.getParent().addMenuListener(new MenuAdapter() {
		@Override
		public void menuShown(MenuEvent arg0) {
			CommandActivator activator = getCommandActivator(command);
			if (activator != null && activator.isFullyEnabled()) {
				menuItem.setEnabled(true);
				// remove old listeners
				Listener[] oldListeners = menuItem.getListeners(SWT.Selection);
				for (Listener oldListener: oldListeners)
					menuItem.removeListener(SWT.Selection, oldListener);
				// handle CHECK and RADIO menu items
				if ((menuItem.getStyle() & (SWT.CHECK | SWT.RADIO)) != 0) {
					menuItem.setSelection(activator.getSelection());
					menuItem.addListener(SWT.Selection, e -> activator.setSelection(!activator.getSelection()));
				}
				// add new listener
				menuItem.addListener(SWT.Selection, e -> activator.click());
				// acquire the CommandActivator's tooltip
				menuItem.setToolTipText(activator.getToolTipText());
			} else
				menuItem.setEnabled(false);
		}
	});
	menuItem.setEnabled(false);
}
 

private static void createFileMenu(Menu bar) {	
	MenuItem fileItem = new MenuItem(bar, SWT.CASCADE);			
	fileItem.setText("File");
	
	Menu menu = new Menu(fileItem);
	fileItem.setMenu(menu);
	
	if (hasLocalRel()) {
		new AcceleratedMenuItem(menu, "New database\tCtrl-n", SWT.MOD1 | 'n', "NewDBIcon", e -> Core.newDatabase());
		new AcceleratedMenuItem(menu, "New database from a backup", 0, "database_restore", e -> Core.restoreDatabase());
		new AcceleratedMenuItem(menu, "Open local database\tCtrl-l", SWT.MOD1 | 'l', "OpenDBLocalIcon", e -> Core.openLocalDatabase());
	}
	new AcceleratedMenuItem(menu, "Open remote database\tCtrl-r", SWT.MOD1 | 'r', "OpenDBRemoteIcon", e-> Core.openRemoteDatabase());
	
	MenuItem recentItem = new MenuItem(menu, SWT.CASCADE);
	recentItem.setText("Recently-opened databases");
	
	menu.addMenuListener(new MenuAdapter() {
		@Override
		public void menuShown(MenuEvent arg0) {
			Menu recentDatabases = new Menu(menu);
			recentItem.setMenu(recentDatabases);				
			String[] dbURLs = Core.getRecentlyUsedDatabaseList();
			if (dbURLs.length > 0) {
				int recentlyUsedCount = 0;
				for (String dbURL: dbURLs) {
					if (dbURL.startsWith("db:") && !hasLocalRel())
						continue;
					(new AcceleratedMenuItem(recentDatabases, "Open " + dbURL, 0, "OpenDBLocalIcon", e -> Core.openDatabase(dbURL))).setEnabled(Core.databaseMayExist(dbURL));
					if (++recentlyUsedCount >= 20)	// arbitrarily decide 20 is enough
						break;
				}
				new MenuItem(recentDatabases, SWT.SEPARATOR);
				new AcceleratedMenuItem(recentDatabases, "Clear this list...", 0, null, e -> Core.clearRecentlyUsedDatabaseList());
			}
		}
	});
	
	OSSpecific.addFileMenuItems(menu);
}
 

public void menuShown(MenuEvent e) {
	if(!this.control.isIgnoreEvents()) {
		this.menuShowListener.onMenuShow(new UIMenuEvent(this.control));
	}
}
 

public void menuHidden(MenuEvent e) {
	if(!this.control.isIgnoreEvents()) {
		this.menuHideListener.onMenuHide(new UIMenuEvent(this.control));
	}
}
 

public void buildMenu(Menu root_menu, MenuEvent menuEvent);