paint_grid(p, y, pp.left(), pp.right());
shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
- if (!segment || (segment->get_sample_count() == 0))
- return;
-
- const double pixels_offset = pp.pixels_offset();
- const double samplerate = max(1.0, segment->samplerate());
- const pv::util::Timestamp& start_time = segment->start_time();
- const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
- const double samples_per_pixel = samplerate * pp.scale();
- const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
- const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
-
- const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
- (int64_t)0), last_sample);
- const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
- (int64_t)0), last_sample);
-
- if (samples_per_pixel < EnvelopeThreshold)
- paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
- pixels_offset, samples_per_pixel);
- else
- paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
- pixels_offset, samples_per_pixel);
+
+ if (segment && (segment->get_sample_count() > 0)) {
+ const double pixels_offset = pp.pixels_offset();
+ const double samplerate = max(1.0, segment->samplerate());
+ const pv::util::Timestamp& start_time = segment->start_time();
+ const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
+ const double samples_per_pixel = samplerate * pp.scale();
+ const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
+ const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
+
+ const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
+ (int64_t)0), last_sample);
+ const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
+ (int64_t)0), last_sample);
+
+ if (samples_per_pixel < EnvelopeThreshold)
+ paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
+ pixels_offset, samples_per_pixel);
+ else
+ paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
+ pixels_offset, samples_per_pixel);
+ }
}
if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
paint_logic_mid(p, pp);
+
+ const QString err = base_->get_error_message();
+ if (!err.isEmpty())
+ paint_error(p, pp);
}
void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)