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https://github.com/libSDL2pp/libSDL2pp.git
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72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
/*
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libSDL2pp - C++11 bindings/wrapper for SDL2
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Copyright (C) 2017 Vraiment <jemc44@gmail.com>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef SDL2PP_PRIVATE_EVENTDISPATCHING_HH
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#define SDL2PP_PRIVATE_EVENTDISPATCHING_HH
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#include <SDL2pp/Private/EventHandler.hh>
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#include <type_traits>
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#include <SDL_events.h>
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#include <iostream>
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using namespace std;
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namespace SDL2pp {
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namespace Private
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{
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template <typename EventHandler>
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auto DispatchSpecificEvent(const SDL_Event &event, EventHandler&& eventHandler) -> typename std::enable_if<IsEventHandlerObject<EventHandler, SDL_Event>::value>::type
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{
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eventHandler.HandleEvent(event);
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}
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template <typename EventHandler>
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auto DispatchSpecificEvent(const SDL_Event &event, EventHandler&& eventHandler) -> typename std::enable_if<IsEventHandlerFunctor<EventHandler, SDL_Event>::value>::type
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{
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eventHandler(event);
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}
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template <typename EventHandler>
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auto DispatchSpecificEvent(const SDL_Event &, EventHandler&&) -> typename std::enable_if<!IsEventHandler<EventHandler, SDL_Event>::value>::type
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{
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static_assert(IsEventHandler<EventHandler, SDL_Event>::value, "Event handler is not a valid functor or object");
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}
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template <typename... EventHandlers>
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void DispatchEvent(const SDL_Event &, EventHandlers&&...);
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template <typename EventHandler, typename... EventHandlers>
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void DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler, EventHandlers&&... eventHandlers) {
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DispatchSpecificEvent(event, eventHandler);
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DispatchEvent(event, eventHandlers...);
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}
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template <>
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void DispatchEvent(const SDL_Event &) {
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// no-op
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}
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}
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}
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#endif
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