+ uint32_t last_segment = session_.get_segment_count() - 1;
+
+ switch (mode) {
+ case Trace::ShowLastSegmentOnly:
+ if (current_segment_ != last_segment)
+ set_current_segment(last_segment);
+ break;
+
+ case Trace::ShowLastCompleteSegmentOnly:
+ // Do nothing if we only have one segment so far
+ if (last_segment > 0) {
+ // If the last segment isn't complete, the previous one must be
+ uint32_t segment_id =
+ (session_.all_segments_complete(last_segment)) ?
+ last_segment : last_segment - 1;
+
+ if (current_segment_ != segment_id)
+ set_current_segment(segment_id);
+ }
+ break;
+
+ case Trace::ShowSingleSegmentOnly:
+ case Trace::ShowAllSegments:
+ case Trace::ShowAccumulatedIntensity:
+ default:
+ // Current segment remains as-is
+ break;
+ }