Refactoring in SizeNotifiable.

Class is a template now and accepts a registraton policy.

src/sizenotifiable.cpp

@@ -1,10 +1,40 @@
 #include "sizenotifiable.hpp"
 #include "sizeratio.hpp"
+#include "sdlmain.hpp"
+#include <cassert>
+#include <ciso646>
 
 namespace cloonel {
+	namespace implem {
+	} //namespace implem
+
+	namespace regbehaviuors {
+		///----------------------------------------------------------------------
+		///----------------------------------------------------------------------
+		void AutoRegister::Register (SizeNotifiableBase* parNotifiable) {
+			assert(m_sdlmain);
+#if !defined(NDEBUG)
+			assert(not m_registered);
+			m_registered = true;
+#endif
+			m_id = m_sdlmain->RegisterForResChange(parNotifiable);
+		}
+
+		///----------------------------------------------------------------------
+		///----------------------------------------------------------------------
+		void AutoRegister::Unregister() noexcept {
+#if !defined(NDEBUG)
+			assert(m_registered);
+			m_registered = false;
+#endif
+			assert(m_sdlmain);
+			m_sdlmain->UnregisterForResChange(m_id);
+		}
+	} //namespace regbehaviuors
+
 	///--------------------------------------------------------------------------
 	///--------------------------------------------------------------------------
-	void SizeNotifiable::NotifyResChanged (const SizeRatio& parSize) {
+	void SizeNotifiableBase::NotifyResChanged (const SizeRatio& parSize) {
 		m_scaleRatio = parSize.Ratio();
 	}
 } //namespace cloonel