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Added event dispatching

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Vraiment 2017-08-05 13:57:30 -07:00
parent 0b636118b9
commit e5d873a7ed
3 changed files with 74 additions and 2 deletions
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1
CMakeLists.txt
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@ -159,6 +159,7 @@ SET(LIBRARY_HEADERS
SDL2pp/Texture.hh
SDL2pp/Wav.hh
SDL2pp/Window.hh
SDL2pp/Private/EventDispatching.hh
SDL2pp/Private/EventHandler.hh
SDL2pp/Private/EventHandlerFunctor.hh
SDL2pp/Private/EventHandlerObject.hh

5
SDL2pp/EventPolling.hh
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@ -22,18 +22,19 @@
#ifndef SDL2PP_EVENTPOLLING_HH
#define SDL2PP_EVENTPOLLING_HH
#include <SDL2pp/Private/EventHandler.hh>
#include <SDL2pp/Private/EventDispatching.hh>
namespace SDL2pp {
namespace Event {
template <typename... EventHandlers>
bool PollEvent(EventHandlers&&...) {
bool PollEvent(EventHandlers&&... eventHandlers) {
SDL_Event event;
if (!SDL_PollEvent(&event)) {
return false;
}
// TODO: Private::DispatchEvent(event, eventHandlers...);
Private::DispatchEvent(event, eventHandlers...);
return true;
}

70
SDL2pp/Private/EventDispatching.hh Normal file
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@ -0,0 +1,70 @@
/*
libSDL2pp - C++11 bindings/wrapper for SDL2
Copyright (C) 2017 Vraiment <jemc44@gmail.com>
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_EVENTDISPATCHING_HH
#define SDL2PP_PRIVATE_EVENTDISPATCHING_HH
#include <SDL2pp/Private/EventHandler.hh>
#include <type_traits>
#include <SDL_events.h>
namespace SDL2pp {
namespace Private
{
template <typename EventHandler>
auto DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler) -> std::enable_if<IsEventHandlerFunctor<EventHandler, SDL_Event>::value>
{
eventHandler(event);
}
template <typename EventHandler>
auto DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler) -> std::enable_if<IsEventHandlerObject<EventHandler, SDL_Event>::value>
{
eventHandler.HandleEvent(event);
}
template <typename EventHandler>
auto DispatchEvent(const SDL_Event&, EventHandler&&) -> std::enable_if<!IsEventHandler<EventHandler, SDL_Event>::value>
{
static_assert(!IsEventHandler<EventHandler, SDL_Event>::value, "One of the given values is not a valid event handler");
}
template <typename... EventHandlers>
void DispatchEvent(const SDL_Event & event, EventHandlers&&... eventHandlers) {
DispatchEvent(event, eventHandlers...);
}
template <typename EventHandler, typename... EventHandlers>
void DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler, EventHandlers&&... eventHandlers) {
DispatchEvent(event, eventHandler);
DispatchEvent(event, eventHandlers...);
}
template <>
void DispatchEvent(const SDL_Event &) {
// no-op
}
}
}
#endif