Show sampling points in analog traces.

[pulseview.git] / pv / view / analogsignal.cpp

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index 2715a386bdf83a37d64e194063b86b23e8c552d8..3c3e5d0571a36a896c91441fe9ef27321bd83cbe 100644 (file)
--- a/pv/view/analogsignal.cpp
+++ b/pv/view/analogsignal.cpp
@@ -38,6 +38,7 @@
 #include "pv/data/analogsegment.hpp"
 #include "pv/data/signalbase.hpp"
 #include "pv/view/view.hpp"
+#include "pv/globalsettings.hpp"
 
 #include <libsigrokcxx/libsigrokcxx.hpp>
 
@@ -61,6 +62,8 @@ const QColor AnalogSignal::SignalColours[4] = {
 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100);
 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100);
 
+const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
+
 const float AnalogSignal::EnvelopeThreshold = 256.0f;
 
 const int AnalogSignal::MaximumVDivs = 10;
@@ -80,7 +83,7 @@ AnalogSignal::AnalogSignal(
        pos_vdivs_(1),
        neg_vdivs_(1),
        resolution_(0),
-       autoranging_(1)
+       autoranging_(true)
 {
        pv::data::Analog* analog_data =
                dynamic_cast<pv::data::Analog*>(data().get());
@@ -277,24 +280,42 @@ void AnalogSignal::paint_trace(QPainter &p,
 {
        p.setPen(base_->colour());
 
-       QPointF *points = new QPointF[end - start];
+       const int64_t points_count = end - start;
+
+       QPointF *points = new QPointF[points_count];
        QPointF *point = points;
 
+       QRectF *const sampling_points = new QRectF[points_count];
+       QRectF *sampling_point = sampling_points;
+
        pv::data::SegmentAnalogDataIterator* it =
                segment->begin_sample_iteration(start);
 
+       const int w = 2;
        for (int64_t sample = start; sample != end; sample++) {
                const float x = (sample / samples_per_pixel -
                        pixels_offset) + left;
 
                *point++ = QPointF(x, y - *((float*)it->value) * scale_);
+               *sampling_point++ = QRectF(x - (w / 2), y - *((float*)it->value) * scale_ - (w / 2), w, w);
+
                segment->continue_sample_iteration(it, 1);
        }
        segment->end_sample_iteration(it);
 
-       p.drawPolyline(points, point - points);
+       p.drawPolyline(points, points_count);
+
+       // Paint the sampling points if enabled
+       GlobalSettings settings;
+       const bool show_sampling_points =
+               settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
+       if (show_sampling_points) {
+               p.setPen(SamplingPointColour);
+               p.drawRects(sampling_points, points_count);
+       }
 
        delete[] points;
+       delete[] sampling_points;
 }
 
 void AnalogSignal::paint_envelope(QPainter &p,