Function OnPaint

Applications/GUITest/main.cpp:15–17

std::vector<Lemon::GUI::ContextMenuEntry> cxt;

void OnPaint(surface_t* surface){
    Lemon::Graphics::DrawRect(0, 0, 640, 480, 255, 0, 0, surface);
}

int main(){
    Lemon::GUI::Window* win = new Lemon::GUI::Window("Test Window", {640, 480}, WINDOW_FLAGS_RESIZABLE, Lemon::GUI::WindowType::GUI);