From: Soeren Apel <redacted>
Date: Thu, 7 Apr 2016 20:03:40 +0000 (+0200)
Subject: AnalogSignal: Implement info text for V/div display
X-Git-Tag: pulseview-0.4.0~314
X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=commitdiff_plain;h=03cc651d78a85308107e0ef3e5e514503d7c723c

AnalogSignal: Implement info text for V/div display
---

diff --git a/pv/view/analogsignal.cpp b/pv/view/analogsignal.cpp
index 6703ce9e..7e5bcd11 100644
--- a/pv/view/analogsignal.cpp
+++ b/pv/view/analogsignal.cpp
@@ -31,6 +31,7 @@
 #include <QGridLayout>
 #include <QLabel>
 #include <QSpinBox>
+#include <QString>
 
 #include "analogsignal.hpp"
 #include "pv/data/analog.hpp"
@@ -66,6 +67,9 @@ const int AnalogSignal::MaximumVDivs = 10;
 const int AnalogSignal::MinScaleIndex = -6;
 const int AnalogSignal::MaxScaleIndex = 7;
 
+const int AnalogSignal::InfoTextMarginRight = 20;
+const int AnalogSignal::InfoTextMarginBottom = 5;
+
 AnalogSignal::AnalogSignal(
 	pv::Session &session,
 	shared_ptr<Channel> channel,
@@ -173,6 +177,27 @@ void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
 			pixels_offset, samples_per_pixel);
 }
 
+void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
+{
+	if (!enabled())
+		return;
+
+	const int y = get_visual_y();
+
+	// Show the info section on the right side of the trace
+	const QString infotext = QString("%1 V/div").arg(resolution_);
+
+	p.setPen(colour_);
+	p.setFont(QApplication::font());
+
+	const QRectF bounding_rect = QRectF(pp.left(),
+			y + v_extents().first,
+			pp.width() - InfoTextMarginRight,
+			v_extents().second - v_extents().first - InfoTextMarginBottom);
+
+	p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
+}
+
 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 {
 	p.setPen(QPen(GridMajorColor, 0.5, Qt::DashLine));
diff --git a/pv/view/analogsignal.hpp b/pv/view/analogsignal.hpp
index 9c9c6db8..47a9980c 100644
--- a/pv/view/analogsignal.hpp
+++ b/pv/view/analogsignal.hpp
@@ -48,6 +48,7 @@ private:
 
 	static const int MaximumVDivs;
 	static const int MaxScaleIndex, MinScaleIndex;
+	static const int InfoTextMarginRight, InfoTextMarginBottom;
 
 public:
 	AnalogSignal(pv::Session &session,
@@ -96,6 +97,13 @@ public:
 	 */
 	void paint_mid(QPainter &p, const ViewItemPaintParams &pp);
 
+	/**
+	 * Paints the foreground layer of the item with a QPainter
+	 * @param p the QPainter to paint into.
+	 * @param pp the painting parameters object to paint with.
+	 */
+	void paint_fore(QPainter &p, const ViewItemPaintParams &pp);
+
 private:
 	void paint_grid(QPainter &p, int y, int left, int right);