+ int32_t bar_mod = 4;
+
+ if (bars < distance (grid.begin(), grid.end()) - 1) {
+ /* grid contains beats and bars */
+ beats = distance (grid.begin(), grid.end()) - bars;
+ } else {
+ /* grid contains only bars */
+ beats = distance (grid.begin(), grid.end());
+
+ if (i != grid.begin()) {
+ const int32_t last_bar = (*i).bar;
+ i--;
+ bar_mod = (last_bar - (*i).bar) * 4;
+ }
+
+ all_bars = true;
+ }
+
+ double canvas_width_used = 1.0;
+ if (leftmost_frame < grid.front().frame) {
+ const framecnt_t frame_distance = max ((framecnt_t) 1, grid.back().frame - grid.front().frame);
+ canvas_width_used = 1.0 - ((grid.front().frame - leftmost_frame) / (double) (frame_distance + grid.front().frame));
+ }
+
+ beat_density = (beats * 10.0f) / (lines.canvas()->width() * canvas_width_used);