pub type MapPinTapCallbackType = extern "C" fn(RefAny, CallbackInfo, MapLatLon) -> Update;Expand description
User hook fired when the user taps the map (a press + release at ~the same point, no pan/pinch).
Receives the tapped MapLatLon (projected via
MapWidget::latlon_at_px) so apps can drop a pin without wiring their own
tap handling + projection. The backreference DI pattern (architecture.md).