💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.1 KiB
83 lines
2.1 KiB
/*
|
|
* Copyright (C) 2021 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef ANTKEEPER_EVENT_HANDLER_HPP
|
|
#define ANTKEEPER_EVENT_HANDLER_HPP
|
|
|
|
#include "event.hpp"
|
|
#include <type_traits>
|
|
|
|
class event_dispatcher;
|
|
|
|
/**
|
|
* Abstract base class for event handlers.
|
|
*/
|
|
class event_handler_base
|
|
{
|
|
private:
|
|
friend class event_dispatcher;
|
|
|
|
/**
|
|
* Receives an event, casts it to its derived event type, then handles it.
|
|
*
|
|
* @param event Received event.
|
|
*/
|
|
virtual void route_event(const event_base& event) = 0;
|
|
};
|
|
|
|
/**
|
|
* Templates abstract base class for event handlers.
|
|
*
|
|
* @tparam Event type.
|
|
*/
|
|
template <typename T>
|
|
class event_handler: public event_handler_base
|
|
{
|
|
public:
|
|
static_assert(std::is_base_of<event_base, T>::value, "T must be a descendant of event_base.");
|
|
|
|
/// Returns the unique event type identifier for the event type handled by this event handler.
|
|
const std::size_t get_handled_event_type_id() const;
|
|
|
|
/**
|
|
* Handles an event of type T.
|
|
*
|
|
* @param event Event to handle.
|
|
*/
|
|
virtual void handle_event(const T& event) = 0;
|
|
|
|
private:
|
|
/// @copydoc event_handler_base::route_event()
|
|
virtual void route_event(const event_base& event) final;
|
|
};
|
|
|
|
template <typename T>
|
|
inline const std::size_t event_handler<T>::get_handled_event_type_id() const
|
|
{
|
|
return T::event_type_id;
|
|
}
|
|
|
|
template <typename T>
|
|
void event_handler<T>::route_event(const event_base& event)
|
|
{
|
|
handle_event(static_cast<const T&>(event));
|
|
}
|
|
|
|
#endif // ANTKEEPER_EVENT_HANDLER_HPP
|
|
|