Trace/AnalogSignal: Improve contrast and precision of the trace lines

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

diff --git a/pv/view/trace.cpp b/pv/view/trace.cpp
index 264541cf18c09f4ca9e5e7b9aebe4431209c22e4..fd6107f63acc9e643518226525593b012ac61485 100644 (file)
--- a/pv/view/trace.cpp
+++ b/pv/view/trace.cpp
@@ -38,7 +38,7 @@
 namespace pv {
 namespace view {
 
-const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
+const QPen Trace::AxisPen(QColor(0, 0, 0, 30*256/100));
 const int Trace::LabelHitPadding = 2;
 
 const QColor Trace::DarkBGColour(235, 235, 235);    // Quite light grey
@@ -196,8 +196,12 @@ void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 
 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 {
+       p.setRenderHint(QPainter::Antialiasing, false);
+
        p.setPen(AxisPen);
-       p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
+       p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
+
+       p.setRenderHint(QPainter::Antialiasing, true);
 }
 
 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)