How to access About, Preferences and Quit menus on carbon
/*******************************************************************************
* Copyright (c) 2000, 2005 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;
/*
* How to access About, Preferences and Quit menus on carbon.
* NOTE: This snippet uses internal SWT packages that are
* subject to change without notice.
*
* For a list of all SWT example snippets see
* http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
*/
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.carbon.*;
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
public class Snippet178 {
private static final int kHICommandPreferences = ('p' << 24) + ('r' << 16)
+ ('e' << 8) + 'f';
private static final int kHICommandAbout = ('a' << 24) + ('b' << 16)
+ ('o' << 8) + 'u';
private static final int kHICommandServices = ('s' << 24) + ('e' << 16)
+ ('r' << 8) + 'v';
public static void main(String[] arg) {
Display.setAppName("AppMenu"); // sets name in Dock
Display display = new Display();
hookApplicationMenu(display, "About AppMenu");
Shell shell = new Shell(display);
shell.setText("Main Window");
shell.open();
while (!shell.isDisposed())
if (!display.readAndDispatch())
display.sleep();
display.dispose();
}
static void hookApplicationMenu(Display display, final String aboutName) {
// Callback target
Object target = new Object() {
int commandProc(int nextHandler, int theEvent, int userData) {
if (OS.GetEventKind(theEvent) == OS.kEventProcessCommand) {
HICommand command = new HICommand();
OS.GetEventParameter(theEvent, OS.kEventParamDirectObject,
OS.typeHICommand, null, HICommand.sizeof, null,
command);
switch (command.commandID) {
case kHICommandPreferences:
return handleCommand("Preferences"); //$NON-NLS-1$
case kHICommandAbout:
return handleCommand(aboutName);
default:
break;
}
}
return OS.eventNotHandledErr;
}
int handleCommand(String command) {
Shell shell = new Shell();
MessageBox preferences = new MessageBox(shell, SWT.ICON_WARNING);
preferences.setText(command);
preferences.open();
shell.dispose();
return OS.noErr;
}
};
final Callback commandCallback = new Callback(target, "commandProc", 3); //$NON-NLS-1$
int commandProc = commandCallback.getAddress();
if (commandProc == 0) {
commandCallback.dispose();
return; // give up
}
// Install event handler for commands
int[] mask = new int[] { OS.kEventClassCommand, OS.kEventProcessCommand };
OS.InstallEventHandler(OS.GetApplicationEventTarget(), commandProc,
mask.length / 2, mask, 0, null);
// create About ... menu command
int[] outMenu = new int[1];
short[] outIndex = new short[1];
if (OS.GetIndMenuItemWithCommandID(0, kHICommandPreferences, 1,
outMenu, outIndex) == OS.noErr
&& outMenu[0] != 0) {
int menu = outMenu[0];
int l = aboutName.length();
char buffer[] = new char[l];
aboutName.getChars(0, l, buffer, 0);
int str = OS.CFStringCreateWithCharacters(OS.kCFAllocatorDefault,
buffer, l);
OS.InsertMenuItemTextWithCFString(menu, str, (short) 0, 0,
kHICommandAbout);
OS.CFRelease(str);
// add separator between About & Preferences
OS.InsertMenuItemTextWithCFString(menu, 0, (short) 1,
OS.kMenuItemAttrSeparator, 0);
// enable pref menu
OS.EnableMenuCommand(menu, kHICommandPreferences);
// disable services menu
OS.DisableMenuCommand(menu, kHICommandServices);
}
// schedule disposal of callback object
display.disposeExec(new Runnable() {
public void run() {
commandCallback.dispose();
}
});
}
}
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