source/src/input/mapper.hpp

/*
 * 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_INPUT_MAPPER_HPP
#define ANTKEEPER_INPUT_MAPPER_HPP

#include "input/mapping.hpp"
#include "event/input-events.hpp"
#include "event/event-handler.hpp"
#include "event/event-dispatcher.hpp"
#include <functional>

namespace input {

/**
 * An input mapper takes a control and listens to input events then generates corresponding input mappings which can be added to an input router.
 */
class mapper:
	public event_handler<key_pressed_event>,
	public event_handler<mouse_moved_event>,
	public event_handler<mouse_wheel_scrolled_event>,
	public event_handler<mouse_button_pressed_event>,
	public event_handler<game_controller_axis_moved_event>,
	public event_handler<game_controller_button_pressed_event>
{
public:
	/**
	 * Creates an input mapper.
	 */
	mapper();

	/**
	 * Destroys an input mapper.
	 */
	virtual ~mapper();

	/**
	 * Sets the event dispatcher to which this input event router will subscribe itself.
	 */
	void set_event_dispatcher(event_dispatcher* event_dispatcher);

	/**
	 * Sets the control for which input mappings will be generated.
	 *
	 * @param control ::control for which input mappings will be generated.
	 */
	void set_control(input::control* control);

	/**
	 * Sets the callback function to the input mappings generated by this input mapper.
	 *
	 * @param callback Callback function operates on an input mapping.
	 */
	void set_callback(std::function<void(const mapping&)> callback);

	/**
	 * Enables or disables the input mapping generation.
	 *
	 * @param enabled Whether to enable input mapping generation or not.
	 */
	void set_enabled(bool enabled);

	/**
	 * Returns true if input mapping generation is enabled.
	 */
	bool is_enabled() const;
	
private:
	void handle_event(const key_pressed_event& event);
	void handle_event(const mouse_moved_event& event);
	void handle_event(const mouse_wheel_scrolled_event& event);
	void handle_event(const mouse_button_pressed_event& event);
	void handle_event(const game_controller_axis_moved_event& event);
	void handle_event(const game_controller_button_pressed_event& event);

	event_dispatcher* event_dispatcher;
	control* control;
	std::function<void(const mapping&)> callback;
	bool enabled;
};

inline bool mapper::is_enabled() const
{
	return enabled;
}

} // namespace input

#endif // ANTKEEPER_INPUT_MAPPER_HPP