-typedef struct _GtkWidget GtkWidget;
-typedef struct _GtkButton GtkButton;
namespace callbacks {
-void OnDestroy(GtkWidget*, gpointer);
-void OnExportClicked(GtkButton*, gpointer);
-void OnAddMaterial(GtkButton*, gpointer);
-void OnRemoveMaterial(GtkButton*, gpointer);
-void OnExportMatClicked(GtkButton* button, gpointer);
+void OnDestroy( GtkWidget *, gpointer );
+void OnExportClicked( GtkButton *, gpointer );
+void OnAddMaterial( GtkButton *, gpointer );
+void OnRemoveMaterial( GtkButton *, gpointer );
+void OnExportMatClicked( GtkButton * button, gpointer );
-}// callbacks
+} // callbacks