X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fview%2Fanalogsignal.cpp;h=2597a8f38445959051cadbdeae26ed7eb9f3ef8f;hp=218a959dd422aed5e6560398bb436a85b86317d5;hb=eee89ff865c28854eebdcecbe344f225b9ee366f;hpb=8a2fafcc1401c4021ee700cc932ef34d6c795941

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index 218a959d..2597a8f3 100644
--- a/pv/view/analogsignal.cpp
+++ b/pv/view/analogsignal.cpp
@@ -63,7 +63,7 @@ AnalogSignal::AnalogSignal(
 	scale_index_(0),
 	scale_index_drag_offset_(0)
 {
-	colour_ = SignalColours[channel_->index() % countof(SignalColours)];
+	set_colour(SignalColours[channel_->index() % countof(SignalColours)]);
 }
 
 AnalogSignal::~AnalogSignal()
@@ -105,8 +105,10 @@ void AnalogSignal::scale_handle_drag_release()
 
 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 {
-	if (channel_->enabled())
+	if (channel_->enabled()) {
+		Trace::paint_back(p, pp);
 		paint_axis(p, pp, get_visual_y());
+	}
 }
 
 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
@@ -128,7 +130,7 @@ void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
 		segments.front();
 
 	const double pixels_offset = pp.pixels_offset();
-	const double samplerate = segment->samplerate();
+	const double samplerate = max(1.0, segment->samplerate());
 	const pv::util::Timestamp& start_time = segment->start_time();
 	const int64_t last_sample = segment->get_sample_count() - 1;
 	const double samples_per_pixel = samplerate * pp.scale();