+ _scale = scale;
+}
+
+void AnalogSignal::paint_back(QPainter &p, int left, int right)
+{
+ if (_probe->enabled)
+ paint_axis(p, get_y(), left, right);
+}
+
+void AnalogSignal::paint_mid(QPainter &p, int left, int right)
+{
+ assert(_data);
+ assert(right >= left);
+
+ assert(_view);
+ const int y = _v_offset - _view->v_offset();
+
+ const double scale = _view->scale();
+ assert(scale > 0);
+
+ const double offset = _view->offset();
+
+ if (!_probe->enabled)
+ return;
+
+ const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots =
+ _data->get_snapshots();
+ if (snapshots.empty())
+ return;
+
+ const shared_ptr<pv::data::AnalogSnapshot> &snapshot =
+ snapshots.front();
+
+ const double pixels_offset = offset / scale;
+ const double samplerate = _data->get_samplerate();
+ const double start_time = _data->get_start_time();
+ const int64_t last_sample = snapshot->get_sample_count() - 1;
+ const double samples_per_pixel = samplerate * scale;
+ const double start = samplerate * (offset - start_time);
+ const double end = start + samples_per_pixel * (right - left);
+
+ const int64_t start_sample = min(max((int64_t)floor(start),
+ (int64_t)0), last_sample);
+ const int64_t end_sample = min(max((int64_t)ceil(end) + 1,
+ (int64_t)0), last_sample);
+
+ if (samples_per_pixel < EnvelopeThreshold)
+ paint_trace(p, snapshot, y, left,
+ start_sample, end_sample,
+ pixels_offset, samples_per_pixel);
+ else
+ paint_envelope(p, snapshot, y, left,
+ start_sample, end_sample,
+ pixels_offset, samples_per_pixel);