Example usage for org.eclipse.swt.internal.carbon OS noErr

Introduction

In this page you can find the example usage for org.eclipse.swt.internal.carbon OS noErr.

Prototype

int noErr

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Usage

From source file:Snippet178.java

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;
                }/*from  w ww.  j  a  v  a  2s.com*/
            }
            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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