+ draw_measures (grid);
+ update_tempo_based_rulers (grid);
+}
+
+struct CurveComparator {
+ bool operator() (TempoCurve const * a, TempoCurve const * b) {
+ return a->position() < b->position();
+ }
+};
+
+void
+Editor::marker_position_changed ()
+{
+ if (!_session) {
+ return;
+ }
+
+ ENSURE_GUI_THREAD (*this, &Editor::tempo_map_changed);
+
+ if (tempo_lines) {
+ tempo_lines->tempo_map_changed();
+ }
+
+ double max_tempo = 0.0;
+ double min_tempo = DBL_MAX;
+
+ for (Marks::iterator x = metric_marks.begin(); x != metric_marks.end(); ++x) {
+ TempoMarker* tempo_marker;
+ MeterMarker* meter_marker;
+ const TempoSection *ts;
+ const MeterSection *ms;
+
+ if ((tempo_marker = dynamic_cast<TempoMarker*> (*x)) != 0) {
+ if ((ts = &tempo_marker->tempo()) != 0) {
+ tempo_marker->set_position (ts->frame ());
+ char buf[64];
+ snprintf (buf, sizeof (buf), "%.3f", ts->beats_per_minute());
+ tempo_marker->set_name (buf);
+
+ max_tempo = max (max_tempo, ts->beats_per_minute());
+ min_tempo = min (min_tempo, ts->beats_per_minute());
+ }
+ }
+ if ((meter_marker = dynamic_cast<MeterMarker*> (*x)) != 0) {
+ if ((ms = &meter_marker->meter()) != 0) {
+ meter_marker->set_position (ms->frame ());
+ }
+ }
+ }
+
+ tempo_curves.sort (CurveComparator());
+
+ const double min_tempo_range = 5.0;
+ const double tempo_delta = fabs (max_tempo - min_tempo);
+
+ if (tempo_delta < min_tempo_range) {
+ max_tempo += min_tempo_range - tempo_delta;
+ min_tempo += tempo_delta - min_tempo_range;
+ }
+
+ for (Curves::iterator x = tempo_curves.begin(); x != tempo_curves.end(); ) {
+ Curves::iterator tmp = x;
+ (*x)->set_max_tempo (max_tempo);
+ (*x)->set_min_tempo (min_tempo);
+ ++tmp;
+ if (tmp != tempo_curves.end()) {
+ (*x)->set_position ((*x)->tempo().frame(), (*tmp)->tempo().frame());
+ } else {
+ (*x)->set_position ((*x)->tempo().frame(), UINT32_MAX);
+ }
+ ++x;
+ }
+
+ for (Marks::iterator x = metric_marks.begin(); x != metric_marks.end(); ++x) {
+ TempoMarker* tempo_marker;
+ if ((tempo_marker = dynamic_cast<TempoMarker*> (*x)) != 0) {
+ tempo_marker->update_height_mark ((tempo_marker->tempo().beats_per_minute() - min_tempo) / max (max_tempo - min_tempo, 10.0));
+ }
+ }
+
+ std::vector<TempoMap::BBTPoint> grid;
+ compute_current_bbt_points (grid, leftmost_frame, leftmost_frame + current_page_samples());
+ draw_measures (grid);
+ update_tempo_based_rulers (grid);