nCine::IAppEventHandler class

#include <nCine/IAppEventHandler.h>

Interface for handling nCine application lifecycle and frame events.

User code derives from this interface and overrides the callbacks of interest. The instance is created by the CreateAppEventHandlerDelegate passed to MainApplication::Run().

Constructors, destructors, conversion operators

~IAppEventHandler() pure virtual

Public functions

void OnPreInitialize(AppConfiguration& config) virtual

Called once before initialization to setup the application.

void OnInitialize() virtual

Called once on application initialization.

void OnBeginFrame() virtual

Called at the start of each frame.

void OnPostUpdate() virtual

Called every time the scenegraph has been traversed and all nodes have been transformed.

void OnDrawViewport(Viewport& viewport) virtual

Called every time a viewport is going to be drawn.

void OnEndFrame() virtual

Called at the end of each frame, just before swapping buffers.

void OnResizeWindow(std::int32_t width, std::int32_t height) virtual

Called every time the window is resized (by the system or the user).

void OnShutdown() virtual

Called once on application shutdown.

void OnSuspend() virtual

Called every time the application needs to be suspended.

void OnResume() virtual

Called every time the application resumes from suspension.

void OnBackInvoked() virtual

Called when the Back gesture is invoked.