How to make a top bar as 'sticky '.

Hello world.

I want to create a sticky top bar. What I meant with a sticky top bar is the place where there are vertical frames that have fields extend more than the height of the screen, the top does not scroll, it sticks. A good reference of maybe it's like twitter app for blackberry. Twitter app, I guess there are 2 HorizontalFieldManager (at least I thought they are HFM), one is a title bar, and the other is the button bar. The Manager of both stays even if scroll us.

I have a configuration manager custom as a topbarmanager and a Middle Manager, which is an example of VerticalFieldManager, as follows

TopBarManager topMgr = new TopBarManager(logoImg);
add(topMgr);

if (_menuList != null) {
    // if array is empty, just show a message
    if (_menuList.length > 0) {
        VerticalFieldManager middleMgr = new VerticalFieldManager();
        for (int i = 0; i < _menuList.length; i++) {
            MenuSelectableField menu = new MenuSelectableField(menuList[i]);
            // set listener to the menu, (when the menu is clicked).
            menu.setChangeListener(new FieldChangeListener() {
                public void fieldChanged(Field f, int context) {
                    showNext(f);
                }
            });
            middleMgr.add(menu);
            middleMgr.add(new SeparatorField());
        }
        add(middleMgr);
    } else {
        LabelField label = new LabelField(
                "No menu, please check back later");
        add(label);
    }
} else {
    LabelField label = new LabelField(
            "No menu, please check back later");
    add(label);
}
// main screen background
setBackground (BackgroundFactory.createSolidBackground(Color.BLUE));

With the above code, the topMgr scrolls to the top when I scroll the screen. I want to stay.

Someone knows how to do this?

Do not call title together.

1. place the main screen on no vertical scrolling

2. Add a field Manager to display main said (this is your title)

3. the field manager manually to perform page layout however much space you want to take

4. Add another manager who is vertically scrollable under the title manager

5 define managers scrollables measure the total height less the height of manager title

6 benefit.

Tags: BlackBerry Developers

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