From: Uwe Hermann <redacted>
Date: Fri, 17 Mar 2017 22:05:23 +0000 (+0100)
Subject: Show sampling points in analog traces.
X-Git-Tag: pulseview-0.4.0~145
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=8de1e1b2fb1bcaaa21f08b7bba412b0839d6c4d2;p=pulseview.git

Show sampling points in analog traces.

This fixes (parts of) bug #485.
---

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index c393bc7c..3c3e5d05 100644
--- 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;
@@ -282,21 +285,37 @@ void AnalogSignal::paint_trace(QPainter &p,
 	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, 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,
diff --git a/pv/view/analogsignal.hpp b/pv/view/analogsignal.hpp
index 542edda9..fa105831 100644
--- a/pv/view/analogsignal.hpp
+++ b/pv/view/analogsignal.hpp
@@ -44,6 +44,7 @@ class AnalogSignal : public Signal
 private:
 	static const QColor SignalColours[4];
 	static const QColor GridMajorColor, GridMinorColor;
+	static const QColor SamplingPointColour;
 
 	static const float EnvelopeThreshold;