+ nearest_edges = signal->get_nearest_level_changes(sample_num);
+
+ if (nearest_edges.size() != 2)
+ return -1;
+
+ // We received absolute sample numbers, make them relative
+ const int64_t left_sample_delta = sample_num - nearest_edges.front().first;
+ const int64_t right_sample_delta = nearest_edges.back().first - sample_num - 1;
+
+ const int64_t left_delta = left_sample_delta / samples_per_pixel;
+ const int64_t right_delta = right_sample_delta / samples_per_pixel;
+
+ // Only use closest left or right edge if they're close to the cursor
+ if ((left_delta < right_delta) && (left_delta < snap_distance_))
+ nearest_sample = nearest_edges.front().first;
+ if ((left_delta >= right_delta) && (right_delta < snap_distance_))
+ nearest_sample = nearest_edges.back().first;
+ } else {
+ // Determine nearest edge from all signals
+
+ int64_t nearest_left_delta = numeric_limits<int64_t>::max();
+ int64_t nearest_right_delta = numeric_limits<int64_t>::max();
+ bool edges_found = false;
+
+ for (shared_ptr<Signal> s : signals_) {
+ if (!s->enabled())
+ continue;