#ifndef TWEAKABLES_H
#define TWEAKABLES_H


class Observable;
class ObservableData;


class Observer
{
public:
	virtual void notify(const Observable& a_subject, const char* a_message) = 0;
};


class Observable
{
public:
	Observable();
	~Observable();
	void registerObserver(Observer& a_observer);
	void unregisterObserver(Observer& a_observer);
	void notifyObservers(const char* a_message) const;
private:
	ObservableData* m_data;
};


#endif // TWEAKABLES_H