# Atlas updates: better unit ownership control; fixed bottom-bar display; fixed iterator problem in undo; renamed 'd' to 'msg' for consistency

This was SVN commit r3836.

source/tools/atlas/AtlasUI/General/Observable.h

@@ -0,0 +1,28 @@
+#ifndef OBSERVABLE_H__
+#define OBSERVABLE_H__
+
+#include <boost/signals.hpp>
+#include <boost/bind.hpp>
+
+typedef boost::signals::connection ObservableConnection;
+
+template <typename T> class Observable : public T
+{
+public:
+	template<typename C> ObservableConnection RegisterObserver(int order, void (C::*callback) (const T&), C* obj)
+	{
+		return m_Signal.connect(order, boost::bind(std::mem_fun(callback), obj, _1));
+	}
+	void RemoveObserver(ObservableConnection handle)
+	{
+		handle.disconnect();
+	}
+	void NotifyObservers()
+	{
+ 		m_Signal(*this);
+	}
+private:
+ 	boost::signal<void (const T&)> m_Signal;
+};
+
+#endif // OBSERVABLE_H__