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#pragma once
namespace nCine
{
class AppConfiguration;
class Viewport;
/** @brief Interface for handling nCine application events */
class IAppEventHandler
{
public:
virtual ~IAppEventHandler() = 0;
/** @brief Called once before initialization to setup the application */
virtual void OnPreInitialize(AppConfiguration& config) {}
/** @brief Called once on application initialization */
virtual void OnInitialize() {}
/** @brief Called at the start of each frame */
virtual void OnBeginFrame() {}
/** @brief Called every time the scenegraph has been traversed and all nodes have been transformed */
virtual void OnPostUpdate() {}
/** @brief Called every time a viewport is going to be drawn */
virtual void OnDrawViewport(Viewport& viewport) {}
/** @brief Called at the end of each frame, just before swapping buffers */
virtual void OnEndFrame() {}
/** @brief Called every time the window is resized (by the system or the user) */
virtual void OnResizeWindow(std::int32_t width, std::int32_t height) {}
/** @brief Called once on application shutdown */
virtual void OnShutdown() {}
/** @brief Called every time the application needs to be suspended */
virtual void OnSuspend() {}
/** @brief Called every time the application resumes from suspension */
virtual void OnResume() {}
/** @brief Called when the `Back` gesture is invoked */
virtual void OnBackInvoked() {}
};
inline IAppEventHandler::~IAppEventHandler() {}
}
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