- all_bbt_points = session->tempo_map().get_points (leftmost_frame, leftmost_frame + current_page_frames());
-
- cnt = 0;
- last_xpos = 0;
-
- /* get the first bar spacing */
-
- gdouble last_beat = DBL_MAX;
- gdouble beat_spacing = 0;
-
- for (i = all_bbt_points->begin(); i != all_bbt_points->end() && beat_spacing == 0; ++i) {
- TempoMap::BBTPoint& p = (*i);
-
- switch (p.type) {
- case TempoMap::Bar:
- break;
-
- case TempoMap::Beat:
- xpos = p.frame / (gdouble) frames_per_unit;
- if (last_beat < xpos) {
- beat_spacing = xpos - last_beat;
- }
- last_beat = xpos;
- }
- }
-
- for (i = all_bbt_points->begin(); i != all_bbt_points->end(); ++i) {
-
- TempoMap::BBTPoint& p = (*i);
-
- switch (p.type) {
- case TempoMap::Bar:
- break;
-
- case TempoMap::Beat:
- xpos = p.frame / (gdouble) frames_per_unit;
-
- if (p.beat == 1) {
- color = color_map[cMeasureLineBeat];
- } else {
- color = color_map[cMeasureLineBar];
-
- /* only draw beat lines if the gaps between beats
- are large.
- */
-
- if (beat_spacing < 25.0) {
- break;
- }
- }
-
- if (cnt == 0 || xpos - last_xpos > 4.0) {
- line = get_time_line ();
- gtk_object_set (GTK_OBJECT(line),
- "x1", xpos,
- "x2", xpos,
- "y2", (gdouble) canvas_height,
- "color_rgba", color,
- NULL);
- gnome_canvas_item_raise_to_top (line);
- gnome_canvas_item_show (line);
- last_xpos = xpos;
- ++cnt;
- }
- break;
- }