SDL: Clean up graphics manager switching slighty.

Sadly this also requires us to extend GraphicsManager for this SDL specific
feature. However, since that's only used in the SDL backend and Tizen it
should be fine for now...

2 files changed, 16 insertions, 6 deletions

diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
index 871c6c49b2..ba8807aaf4 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
@@ -193,10 +193,6 @@ SurfaceSdlGraphicsManager::SurfaceSdlGraphicsManager(SdlEventSource *sdlEventSou
 }
 
 SurfaceSdlGraphicsManager::~SurfaceSdlGraphicsManager() {
-	// Unregister the event observer
-	if (g_system->getEventManager()->getEventDispatcher() != NULL)
-		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
-
 	unloadGFXMode();
 	if (_mouseSurface)
 		SDL_FreeSurface(_mouseSurface);
@@ -211,11 +207,24 @@ SurfaceSdlGraphicsManager::~SurfaceSdlGraphicsManager() {
 	free(_mouseData);
 }
 
-void SurfaceSdlGraphicsManager::initEventObserver() {
+void SurfaceSdlGraphicsManager::activateManager() {
+	GraphicsManager::activateManager();
+	initEventSource();
+
 	// Register the graphics manager as a event observer
 	g_system->getEventManager()->getEventDispatcher()->registerObserver(this, 10, false);
 }
 
+void SurfaceSdlGraphicsManager::deactivateManager() {
+	// Unregister the event observer
+	if (g_system->getEventManager()->getEventDispatcher()) {
+		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
+	}
+
+	deinitEventSource();
+	GraphicsManager::deactivateManager();
+}
+
 bool SurfaceSdlGraphicsManager::hasFeature(OSystem::Feature f) {
 	return
 		(f == OSystem::kFeatureFullscreenMode) ||
diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.h b/backends/graphics/surfacesdl/surfacesdl-graphics.h
index 97de0f9c97..0bee70bf0c 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.h
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.h
@@ -80,7 +80,8 @@ public:
 	SurfaceSdlGraphicsManager(SdlEventSource *sdlEventSource);
 	virtual ~SurfaceSdlGraphicsManager();
 
-	virtual void initEventObserver();
+	virtual void activateManager();
+	virtual void deactivateManager();
 
 	virtual bool hasFeature(OSystem::Feature f);
 	virtual void setFeatureState(OSystem::Feature f, bool enable);