void clear_selection ();
void recreate_views ();
void setup_scrollbars ();
void scrolled (wxScrollWinEvent& ev);
void set_pixels_per_second (double pps);
void set_pixels_per_track (int h);
void clear_selection ();
void recreate_views ();
void setup_scrollbars ();
void scrolled (wxScrollWinEvent& ev);
void set_pixels_per_second (double pps);
void set_pixels_per_track (int h);