Hi all

i am new to blackberry application development here is my question i am using two verticalfieldmanager "layout" and "manager" in my application. layout has three custom button field and layout is inside manager.

i am not able to implement touch event , here is my code:

public class MenuScreen extends MainScreen {
    public MenuScreen() {
        super(Screen.DEFAULT_CLOSE);
        Bitmap menuBackgroundImage = Bitmap
                .getBitmapResource("com/greetings/Images/MenuBackground.jpg");
        final VerticalFieldManager layout = new VerticalFieldManager() {
            public boolean touchEvent(TouchEvent message) {
                int x = message.getGlobalX(1);
                int y = message.getGlobalY(1);
                if (getExtent().contains(x, y)) {
                    int fieldI = getFieldAtLocation(x, y);
                    Field field = getField(fieldI);
                    field.setFocus();
                    return super.touchEvent(message);
                }
                return false;
            }
        };
        ButtonField categories = new ButtonField("Categories") {
            public void run() {
                Dialog.alert("one");
            }
            public boolean touchEvent(TouchEvent message) {
                int x = message.getX(1);
                int y = message.getY(1);
                int w = getWidth();
                int h = getHeight();
                if (x >= 0 && x <= w && y >= 0 && y <= h) {
                    switch (message.getEvent()) {
                    case TouchEvent.DOWN:
                        setFocus();
                        return true;
                    case TouchEvent.UNCLICK:
                        run();
                        return true;
                    }
                }
                return false;
            }
        };
        ButtonField help = new ButtonField("Help") {
            public void run() {
                Dialog.alert("help");
            }
            public boolean touchEvent(TouchEvent message) {
                int x = message.getX(1);
                int y = message.getY(1);
                int w = getWidth();
                int h = getHeight();
                if (x >= 0 && x <= w && y >= 0 && y <= h) {
                    switch (message.getEvent()) {
                    case TouchEvent.DOWN:
                        setFocus();
                        return true;
                    case TouchEvent.UNCLICK:
                        run();
                        return true;
                    }
                }
                return false;
            }
        };
        ButtonField developer = new ButtonField("Developer") {
            public void run() {
                Dialog.alert("Developer");
            }
            public boolean touchEvent(TouchEvent message) {
                int x = message.getX(1);
                int y = message.getY(1);
                int w = getWidth();
                int h = getHeight();
                if (x >= 0 && x <= w && y >= 0 && y <= h) {
                    switch (message.getEvent()) {
                    case TouchEvent.DOWN:
                        setFocus();
                        return true;
                    case TouchEvent.UNCLICK:
                        run();
                        return true;
                    }
                }
                return false;
            }
        };
        layout.add(categories);
        layout.add(help);
        layout.add(developer);
        VerticalFieldManager manager = new VerticalFieldManager() {
            protected void sublayout(int width, int height) {
                width = Display.getWidth();
                height = Display.getHeight();
                super.sublayout(width, height);
                setPositionChild(layout, width - 245, height - 350);
                setExtent(width, height);
            }
        };
        manager.setBackground(BackgroundFactory
                .createBitmapBackground(menuBackgroundImage));
        manager.add(layout);
        add(manager);
    }
}