Cause sub-menu to display

Hi,

We currently have a radial menu with 1st level menu items. Some of the 1st level items have sub menu items. The normal drill-down menu appears, and when tapped, the menu navigates to show those sub-items (in this case colour picker options), however the tap area to drilldown can sometimes be too small.

I was looking at adding to the 1st level item's tapped event to force it to drill down when the item is tapped (in addition to when the drill-down tab is clicked).

How can I do this?

Thanks,

Kurt