onTapDown method
Implementation
@override
void onTapDown(TapDownEvent event) {
for (final field in _registeredFields) {
final rect = field.toAbsoluteRect();
final tapPos = event.canvasPosition.toOffset();
// Notify the field if the tap was outside its bounds.
if (!rect.contains(tapPos)) {
field.onTapDownOutside(event);
}
}
event.continuePropagation = true;
}