| /******************************************************************************* |
| * Copyright (c) 2010, 2016 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * Display snippet: slightly more complex example for Display.getMenuBar() (compared to Snippet347) |
| * Shows how to write a more cross-platform multi-window application using Display.getMenuBar(). |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.7 |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet348 { |
| |
| static boolean createdScreenBar = false; |
| |
| static void createMenuBar(Shell s) { |
| Menu bar = Display.getCurrent().getMenuBar(); |
| boolean hasAppMenuBar = (bar != null); |
| if (bar == null) { |
| bar = new Menu(s, SWT.BAR); |
| } |
| |
| // Populate the menu bar once if this is a screen menu bar. |
| // Otherwise, we need to make a new menu bar for each shell. |
| if (!createdScreenBar || !hasAppMenuBar) { |
| MenuItem item = new MenuItem(bar, SWT.CASCADE); |
| item.setText("File"); |
| Menu menu = new Menu(item); |
| item.setMenu(menu); |
| menu.addMenuListener(new MenuListener() { |
| |
| @Override |
| public void menuHidden(MenuEvent e) { |
| System.out.println("Menu closed: " + e); |
| } |
| |
| @Override |
| public void menuShown(MenuEvent e) { |
| System.out.println("Menu open: " + e); |
| } |
| |
| }); |
| MenuItem newWindow = new MenuItem(menu, SWT.PUSH); |
| newWindow.setText("New Window"); |
| newWindow.setAccelerator(SWT.MOD1 | 'N'); |
| newWindow.addListener(SWT.Selection, event -> { |
| Shell s1 = createShell(); |
| s1.open(); |
| }); |
| if (!SWT.getPlatform().equals("cocoa")) { |
| MenuItem exit = new MenuItem(menu, SWT.PUSH); |
| exit.setText("Exit"); |
| exit.addListener(SWT.Selection, event -> { |
| Display d = Display.getCurrent(); |
| Shell[] shells = d.getShells(); |
| for (Shell shell : shells) { |
| shell.close(); |
| } |
| }); |
| } |
| if (!hasAppMenuBar) s.setMenuBar(bar); |
| createdScreenBar = true; |
| } |
| } |
| |
| static Shell createShell() { |
| final Shell shell = new Shell(SWT.SHELL_TRIM); |
| createMenuBar(shell); |
| |
| shell.addDisposeListener(e -> { |
| Display d = Display.getCurrent(); |
| Menu bar = d.getMenuBar(); |
| boolean hasAppMenuBar = (bar != null); |
| if (!hasAppMenuBar) { |
| shell.getMenuBar().dispose(); |
| Shell[] shells = d.getShells(); |
| if ((shells.length == 1) && (shells[0] == shell)) { |
| if (!d.isDisposed()) d.dispose(); |
| } |
| } |
| }); |
| |
| return shell; |
| } |
| |
| public static void main(String[] args) { |
| final Display display = new Display(); |
| |
| Shell shell = createShell(); |
| shell.open(); |
| |
| while (!display.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| } |
| } |