+++ /dev/null
-#ifndef OBSERVABLE_H
-#define OBSERVABLE_H
-
-
-#include "collectdisplay.h"
-
-
-/***********************************************************************/
-
-class Observable {
-
-public:
- virtual void registerDisplay(Display*) = 0;
- virtual void removeDisplay(Display*) = 0;
- virtual void notifyDisplays() = 0;
- virtual ~Observable() {}
-};
-
-/***********************************************************************/
-
-#endif