diff --git a/CMakeLists.txt b/CMakeLists.txt index c9118e9..68a526b 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -158,6 +158,7 @@ SET(LIBRARY_HEADERS SDL2pp/Texture.hh SDL2pp/Wav.hh SDL2pp/Window.hh + SDL2pp/Private/EventHandler.hh SDL2pp/Private/EventHandlerFunctor.hh SDL2pp/Private/EventHandlerObject.hh SDL2pp/Private/Utility.hh diff --git a/SDL2pp/Private/EventHandler.hh b/SDL2pp/Private/EventHandler.hh new file mode 100644 index 0000000..e8a825e --- /dev/null +++ b/SDL2pp/Private/EventHandler.hh @@ -0,0 +1,105 @@ +/* + libSDL2pp - C++11 bindings/wrapper for SDL2 + Copyright (C) 2017 Vraiment + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +#ifndef SDL2PP_PRIVATE_EVENTHANDLER_HH +#define SDL2PP_PRIVATE_EVENTHANDLER_HH + +#include +#include +#include + +#include +#include + +#include + +namespace SDL2pp { +/* + * This is code not to be used directly by users of SDL2pp. + */ +namespace Private { + /* + * Tuple containing all the valid events that can be handled. + */ + using ValidEventTypes = std::tuple< + SDL_Event, + SDL_AudioDeviceEvent, + SDL_ControllerAxisEvent, + SDL_ControllerButtonEvent, + SDL_ControllerDeviceEvent, + SDL_DollarGestureEvent, + SDL_DropEvent, + SDL_JoyAxisEvent, + SDL_JoyBallEvent, + SDL_JoyButtonEvent, + SDL_JoyDeviceEvent, + SDL_JoyHatEvent, + SDL_KeyboardEvent, + SDL_MouseButtonEvent, + SDL_MouseMotionEvent, + SDL_MouseWheelEvent, + SDL_MultiGestureEvent, + SDL_QuitEvent, + SDL_SysWMEvent, + SDL_TextEditingEvent, + SDL_TextInputEvent, + SDL_TouchFingerEvent, + SDL_UserEvent, + SDL_WindowEvent + >; + + /* + * Templated class to identify a class that is not an event handler. + */ + template + struct IsEventHandler : std::false_type { }; + + /* + * Templated class to identify a type that is an event handler, the type + * EventHandlerType is considered to be an event handler if is either an + * event handler object or an event handler functor for the given event + * type. Also the event type must be a valid SDL event type. + * + * In other words, any of the following code can be executed: + * { + * EventType event; + * EventHandlerType eventHandler; + * eventHandler(event); + * // or + * eventHandler.HandleEvent(event); + * } + */ + template + struct IsEventHandler< + EventHandlerType, + EventType, + And< + Or< + IsEventHandlerObject, + IsEventHandlerFunctor + >, + TupleHasType + > + > : std::true_type { }; +} +} + +#endif