Improved Atlas class

It now handles layer resize failure and will notify listeners of a
pointer change


Former-commit-id: df5e2a129897128a4e41e0b3205f6a1dbeb2069c

src/Nazara/Utility/AbstractAtlas.cpp

@@ -45,6 +45,23 @@ void NzAbstractAtlas::NotifyCleared()
 	m_listenersLocked = false;
 }
 
+void NzAbstractAtlas::NotifyLayerChange(NzAbstractImage* oldLayer, NzAbstractImage* newLayer)
+{
+	m_listenersLocked = true;
+
+	auto it = m_listeners.begin();
+	while (it != m_listeners.end())
+	{
+		if (!it->first->OnAtlasLayerChange(this, oldLayer, newLayer, it->second))
+			m_listeners.erase(it++);
+		else
+			++it;
+	}
+
+	m_listenersLocked = false;
+}
+
+
 NzAbstractAtlas::Listener::~Listener() = default;
 
 bool NzAbstractAtlas::Listener::OnAtlasCleared(const NzAbstractAtlas* atlas, void* userdata)
@@ -55,6 +72,16 @@ bool NzAbstractAtlas::Listener::OnAtlasCleared(const NzAbstractAtlas* atlas, voi
 	return true;
 }
 
+bool NzAbstractAtlas::Listener::OnAtlasLayerChange(const NzAbstractAtlas* atlas, NzAbstractImage* oldLayer, NzAbstractImage* newLayer, void* userdata)
+{
+	NazaraUnused(atlas);
+	NazaraUnused(oldLayer);
+	NazaraUnused(newLayer);
+	NazaraUnused(userdata);
+
+	return true;
+}
+
 void NzAbstractAtlas::Listener::OnAtlasReleased(const NzAbstractAtlas* atlas, void* userdata)
 {
 	NazaraUnused(atlas);