#if !defined(INCLUDED_GRID_H)
#define INCLUDED_GRID_H
+#include "signal/signalfwd.h"
+
float GetGridSize();
int Grid_getPower();
-class Callback;
-void AddGridChangeCallback(const Callback& callback);
+void AddGridChangeCallback(const SignalHandler& handler);
void Grid_registerCommands();
typedef struct _GtkMenu GtkMenu;