EventHandler.hpp

/******************************************************************************
 
  nomlib - C++11 cross-platform game engine
 
Copyright (c) 2013, 2014 Jeffrey Carpenter <i8degrees@gmail.com>
All rights reserved.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
 
1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
******************************************************************************/
#ifndef NOMLIB_SYSTEM_EVENT_HANDLER_HPP
#define NOMLIB_SYSTEM_EVENT_HANDLER_HPP
 
#include <deque>
#include <vector>
 
#include "nomlib/config.hpp"
#include "nomlib/system/Event.hpp"
 
// Forward declarations (third-party)
union SDL_Event;
 
namespace nom {
 
// Forward declarations
struct event_watcher;
class JoystickEventHandler;
class GameControllerEventHandler;

class EventHandler
{
  public:
    typedef EventHandler self_type;
 
    enum JoystickHandlerType
    {
      NO_EVENT_HANDLER = 0,
      SDL_JOYSTICK_EVENT_HANDLER,
      GAME_CONTROLLER_EVENT_HANDLER,
    };
 
    EventHandler();
 
    ~EventHandler();

    EventHandler(const EventHandler& rhs) = delete;

    EventHandler& operator =(const EventHandler& rhs) = delete;

    nom::size_type num_events() const;

    nom::size_type num_event_watchers() const;

    JoystickEventHandler* joystick_event_handler() const;

    GameControllerEventHandler* game_controller_event_handler() const;
 
    JoystickHandlerType joystick_event_type() const;

    bool enable_joystick_polling();

    bool enable_game_controller_polling();

    void disable_joystick_polling();

    void disable_game_controller_polling();

    bool poll_event(Event& ev);

    void push_event(const Event& ev);

    void flush_event(Event::EventType type);

    void flush_events(Event::EventType type);

    void flush_events();

    void append_event_watch(const event_filter& filter, void* data);

    void remove_event_watch(const event_filter& filter);

    void remove_event_watchers();
 
  private:
    bool pop_event(Event& ev);

    void process_events();

    void process_event(const SDL_Event* ev);
 
    void process_joystick_event(const SDL_Event* ev);
    void process_game_controller_event(const SDL_Event* ev);

    std::deque<Event> events_;
 
    std::vector<std::unique_ptr<event_watcher>> event_watchers_;

    nom::size_type max_events_count_ = 0;
 
    void* joystick_event_handler_ = nullptr;
    JoystickHandlerType joystick_event_type_ = NO_EVENT_HANDLER;
};
 
Event create_key_press(int32 sym, uint16 mod, uint8 repeat);
Event create_key_release(int32 sym, uint16 mod, uint8 repeat);
Event create_mouse_button_click(uint8 button, uint8 clicks, uint32 window_id);
Event create_mouse_button_release(uint8 button, uint8 clicks, uint32 window_id);
 
Event create_joystick_button_press(JoystickID id, uint8 button);
Event create_joystick_button_release(JoystickID id, uint8 button);
 
Event create_joystick_hat_motion(JoystickID id, uint8 hat, uint8 value);
 
Event create_game_controller_button_press(JoystickID id, uint8 button);
Event create_game_controller_button_release(JoystickID id, uint8 button);
 
Event create_user_event(int32 code, void* data1, void* data2, uint32 window_id);
 
Event create_quit_event(void* data1, void* data2);
 
} // namespace nom
 
#endif // include guard defined