From 561ba3ae052a93fe150a2161fcdc361144e68e4f Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Tue, 1 Aug 2017 00:09:06 +0200
Subject: [PATCH] Trace view: Make the zero line for analog traces thicker

This is to make it stand out more and make it easily
distinguishable.
---
 pv/views/trace/analogsignal.cpp | 3 +++
 pv/views/trace/analogsignal.hpp | 1 +
 pv/views/trace/trace.cpp        | 3 ++-
 pv/views/trace/trace.hpp        | 1 +
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp
index c40c93b0..323a2434 100644
--- a/pv/views/trace/analogsignal.cpp
+++ b/pv/views/trace/analogsignal.cpp
@@ -70,6 +70,7 @@ const QColor AnalogSignal::SignalColours[4] = {
 	QColor(0x4E, 0x9A, 0x06)	// Green
 };
 
+const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
 
@@ -99,6 +100,8 @@ AnalogSignal::AnalogSignal(
 	display_type_(DisplayBoth),
 	autoranging_(true)
 {
+	axis_pen_ = AxisPen;
+
 	pv::data::Analog* analog_data =
 		dynamic_cast<pv::data::Analog*>(data().get());
 
diff --git a/pv/views/trace/analogsignal.hpp b/pv/views/trace/analogsignal.hpp
index 37b0c1a3..3b352f93 100644
--- a/pv/views/trace/analogsignal.hpp
+++ b/pv/views/trace/analogsignal.hpp
@@ -47,6 +47,7 @@ class AnalogSignal : public Signal
 	Q_OBJECT
 
 private:
+	static const QPen AxisPen;
 	static const QColor SignalColours[4];
 	static const QColor GridMajorColor, GridMinorColor;
 	static const QColor SamplingPointColour;
diff --git a/pv/views/trace/trace.cpp b/pv/views/trace/trace.cpp
index 774351c6..f9bd87e1 100644
--- a/pv/views/trace/trace.cpp
+++ b/pv/views/trace/trace.cpp
@@ -50,6 +50,7 @@ const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15 * 255 / 100);
 
 Trace::Trace(shared_ptr<data::SignalBase> channel) :
 	base_(channel),
+	axis_pen_(AxisPen),
 	popup_(nullptr),
 	popup_form_(nullptr)
 {
@@ -180,7 +181,7 @@ void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 {
 	p.setRenderHint(QPainter::Antialiasing, false);
 
-	p.setPen(AxisPen);
+	p.setPen(axis_pen_);
 	p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 
 	p.setRenderHint(QPainter::Antialiasing, true);
diff --git a/pv/views/trace/trace.hpp b/pv/views/trace/trace.hpp
index 66a98055..407592de 100644
--- a/pv/views/trace/trace.hpp
+++ b/pv/views/trace/trace.hpp
@@ -144,6 +144,7 @@ private Q_SLOTS:
 
 protected:
 	shared_ptr<data::SignalBase> base_;
+	QPen axis_pen_;
 
 private:
 	pv::widgets::Popup *popup_;
-- 
2.30.2