This PR adds a new ProcessingModule for lazy people like me: The CallbackModule. It allows you to easily add callbacks arbitrary event types that are handled in sempr.
Please refrain from using it too excessively, it is meant for small, application specific triggers. In my case, I used it to collect information about changed SpatialObjects to update a visualization later on.
You can use it e.g. with lambdas, like this, but other function- and member-function-pointers should work, too:
auto myCallbackModule = sempr::processing::CreateCallbackModule(
[](sempr::core::EntityEvent<sempr::entity::SpatialObject>::Ptr event)
{
std::cout << "myCallbackModule reacting to a SpatialObject-Event!" << std::endl;
}
);
sempr::core::Core core;
core.addModule(myCallbackModule);
The sempr::core::CreateCallbackModule(Func f) is a helper function that infers the needed template arguments for you, so you don't have to write:
sempr::processing::CallbackModule<sempr::core::EntityEvent<sempr::entity::SpatialObject>>::Ptr
myCallbackModule(
new sempr::processing::CallbackModule<sempr::core::EntityEvent<sempr::entity::SpatialObject>>(
[](sempr::core::EntityEvent<sempr::entity::SpatialObject>::Ptr event)
{
std::cout << "myCallbackModule reacting to SpatialObjectEvent!" << std::endl;
}
)
);
I also extended Utility.hpp provide the template magic needed for this simplification:
function_traits extract return type and argument types
extract_type extracts types from the template args of a type,
e.g. extract_type<std::Tuple<int, float, double>, 1>::type
is float.
This PR adds a new ProcessingModule for lazy people like me: The
CallbackModule. It allows you to easily add callbacks arbitrary event types that are handled in sempr. Please refrain from using it too excessively, it is meant for small, application specific triggers. In my case, I used it to collect information about changed SpatialObjects to update a visualization later on.You can use it e.g. with lambdas, like this, but other function- and member-function-pointers should work, too:
The
sempr::core::CreateCallbackModule(Func f)is a helper function that infers the needed template arguments for you, so you don't have to write:I also extended Utility.hpp provide the template magic needed for this simplification:
function_traitsextract return type and argument typesextract_typeextracts types from the template args of a type, e.g.extract_type<std::Tuple<int, float, double>, 1>::typeisfloat.