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...

1 files changed, 13 insertions, 4 deletions

diff --git a/backends/graphics/openglsdl/openglsdl-graphics.cpp b/backends/graphics/openglsdl/openglsdl-graphics.cpp
index 925237b75e..088e97b1f7 100644
--- a/backends/graphics/openglsdl/openglsdl-graphics.cpp
+++ b/backends/graphics/openglsdl/openglsdl-graphics.cpp
@@ -82,15 +82,24 @@ OpenGLSdlGraphicsManager::OpenGLSdlGraphicsManager(uint desktopWidth, uint deskt
 }
 
 OpenGLSdlGraphicsManager::~OpenGLSdlGraphicsManager() {
+}
+
+void OpenGLSdlGraphicsManager::activateManager() {
+	OpenGLGraphicsManager::activateManager();
+	initEventSource();
+
+	// Register the graphics manager as a event observer
+	g_system->getEventManager()->getEventDispatcher()->registerObserver(this, 10, false);
+}
+
+void OpenGLSdlGraphicsManager::deactivateManager() {
 	// Unregister the event observer
 	if (g_system->getEventManager()->getEventDispatcher()) {
 		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
 	}
-}
 
-void OpenGLSdlGraphicsManager::initEventObserver() {
-	// Register the graphics manager as a event observer
-	g_system->getEventManager()->getEventDispatcher()->registerObserver(this, 10, false);
+	deinitEventSource();
+	OpenGLGraphicsManager::deactivateManager();
 }
 
 bool OpenGLSdlGraphicsManager::hasFeature(OSystem::Feature f) {