/**
* Removes all top-level sub-menus and reassigns their children to the parent menu.
*
* @param menu The parent menu containing the sub-menus to collapse.
*/
private static void collapseSubMenus(RadialMenu menu) {
final List<RadialMenuItem> menuItems = menu.getItems(false /* includeCorners */);
for (RadialMenuItem item : menuItems) {
if (item.hasSubMenu()) {
final RadialSubMenu subMenu = item.getSubMenu();
final List<RadialMenuItem> subItems = subMenu.getItems(true /* includeCorners */);
menu.removeItem(item.getItemId());
menu.addAll(subItems);
}
}
}