More complex example using getAppMenuBar.

1 files changed, 115 insertions, 0 deletions

diff --git a/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet348.java b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet348.java
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+++ b/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet348.java
@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * Copyright (c) 2010 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 getAppMenuBar() (compared to Snippet347)
+ * Shows how to write a more cross-platform multi-window application using getAppMenuBar().
+ *
+ * For a list of all SWT example snippets see
+ * http://www.eclipse.org/swt/snippets/
+ */
+
+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().getAppMenuBar();
+		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() {
+
+				public void menuHidden(MenuEvent e) {
+					System.out.println("Menu closed: " + e);
+				}
+
+				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, new Listener() {
+				public void handleEvent(Event event) {
+					Shell s = createShell();
+					s.open();
+				}
+			});
+			if (!SWT.getPlatform().equals("cocoa")) {
+				MenuItem exit = new MenuItem(menu, SWT.PUSH);
+				exit.setText("Exit");
+				exit.addListener(SWT.Selection, new Listener() {
+					public void handleEvent(Event 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(new DisposeListener() {
+			public void widgetDisposed(DisposeEvent e) {
+				Display d = Display.getCurrent();
+				Menu bar = d.getAppMenuBar();
+				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();
+		}
+	}
+}
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