Don't generate SDL events on Atlas shutdown

WX may still generate mouse events after calling CVideoMode::Shutdown(),
so don't create SDL events triggering assertions.

Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>

source/ps/VideoMode.cpp

@@ -963,6 +963,11 @@ SDL_Window* CVideoMode::GetWindow()
 	return m_Window;
 }
 
+bool CVideoMode::IsInitialized() const
+{
+	return m_IsInitialised;
+}
+
 void CVideoMode::SetWindowIcon()
 {
 	// The window icon should be kept outside of art/textures/, or else it will be converted

source/ps/VideoMode.h

@@ -95,6 +95,7 @@ public:
 	int GetBPP() const;
 
 	bool IsVSyncEnabled() const;
+	bool IsInitialized() const;
 
 	int GetDesktopXRes() const;
 	int GetDesktopYRes() const;

source/tools/atlas/GameInterface/Handlers/MiscHandlers.cpp

@@ -118,6 +118,9 @@ MESSAGEHANDLER(GuiSwitchPage)
 
 MESSAGEHANDLER(GuiMouseButtonEvent)
 {
+	if (!g_VideoMode.IsInitialized())
+		return;
+
 	SDL_Event ev{};
 	ev.type = msg->pressed ? SDL_MOUSEBUTTONDOWN : SDL_MOUSEBUTTONUP;
 	ev.button.button = msg->button;
@@ -132,6 +135,9 @@ MESSAGEHANDLER(GuiMouseButtonEvent)
 
 MESSAGEHANDLER(GuiMouseMotionEvent)
 {
+	if (!g_VideoMode.IsInitialized())
+		return;
+
 	SDL_Event ev{};
 	ev.type = SDL_MOUSEMOTION;
 	float x, y;
@@ -143,6 +149,9 @@ MESSAGEHANDLER(GuiMouseMotionEvent)
 
 MESSAGEHANDLER(GuiKeyEvent)
 {
+	if (!g_VideoMode.IsInitialized())
+		return;
+
 	SDL_Event ev{};
 	ev.type = msg->pressed ? SDL_KEYDOWN : SDL_KEYUP;
 	ev.key.keysym.sym = static_cast<SDL_Keycode>(static_cast<int>(msg->sdlkey));
@@ -152,6 +161,9 @@ MESSAGEHANDLER(GuiKeyEvent)
 
 MESSAGEHANDLER(GuiCharEvent)
 {
+	if (!g_VideoMode.IsInitialized())
+		return;
+
 	// Simulate special 'text input' events in the SDL
 	// This isn't quite compatible with WXWidget's handling,
 	// so to avoid trouble we only send 'letter-like' ASCII input.