Flex 3: HBox children Scrolling with buttons

Question

I have an HBox with width=500.
I actually want to add two arrows buttons that will scroll the contents of the HBox. But when I turn HBox's scroll policy to off, I can't scroll it programmatically using horizontalScrollPosition.

What should i do now? Thanks

Answer 1

Scroll bars will not be displayed when scrollPolicy is turned off.

Answer 2

I think for what you want, you want to subclass ScrollBar make it look and feel the way you would like, then set it on your Container.horizontalScrollBar

Answer 3

I've hacked together this custom HBox that you could use. Simply set horizontalScrollPolicy to either "on" or "auto". I really haven't tested it all that much, works for a simple test I did...

public class CustomHBox extends HBox
{
    override public function validateDisplayList():void
    {
        super.validateDisplayList();

        if (horizontalScrollBar)
            horizontalScrollBar.visible = false;
    }
}