Function PopupMenu.submenuPopupDelay
Sets the delay time in seconds for the submenu item to popup on mouse hovering. If the popup menu is added as a child of another (acting as a submenu), it will inherit the delay time of the parent menu item.
double submenuPopupDelay() nothrow @property @nogc;
void submenuPopupDelay
(
double v
) nothrow @property @nogc;