template<class S> class signal;
/** A signal/slot mechanism
- *
- * S is expected to be the function signature of the signal.
- * I'm not sure we need a return value (it is currently ignored).
- * If we don't we might use `signal<P1, P2, ...>` instead.
- */
+ *
+ * The template parameter is the function signature of the signal.
+ * The return value currently ignored.
+ */
template<class R, class... P>
class signal<R(P...)> {
using callback_type = std::function<R(P...)>;
unsigned int callback_sequence_id = 0;
public:
+ /** Add a new callback to this signal */
template <class U> unsigned int connect(U slot)
{
handlers_.insert({callback_sequence_id, std::move(slot)});
return callback_sequence_id++;
}
+ /** Fire that signal, invoking all callbacks */
R operator()(P... args) const
{
for (auto const& handler : handlers_)
handler.second(args...);
}
+ /** Remove a callback */
void disconnect(unsigned int id) { handlers_.erase(id); }
+ /** Remove all callbacks */
void disconnect_slots() { handlers_.clear(); }
+ /** Get the amount of callbacks */
int get_slot_count() { return handlers_.size(); }
};
