void on_always_zoom_to_fit_changed(bool state);
void on_new_segment(int new_segment_id);
void on_segment_changed(int segment_id);
void on_segment_selected(int ui_segment_id);
void on_always_zoom_to_fit_changed(bool state);
void on_new_segment(int new_segment_id);
void on_segment_changed(int segment_id);
void on_segment_selected(int ui_segment_id);