statistics: convert HistogramMarkers to QSGNodes

This is in analogy to the quartile markers.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 29 insertions, 0 deletions

diff --git a/stats/histogrammarker.cpp b/stats/histogrammarker.cpp
new file mode 100644
index 000000000..e7b2512e3
--- /dev/null
+++ b/stats/histogrammarker.cpp
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "histogrammarker.h"
+#include "statsaxis.h"
+#include "zvalues.h"
+
+static const double histogramMarkerWidth = 2.0;
+
+HistogramMarker::HistogramMarker(StatsView &view, double val, bool horizontal,
+				 QColor color, StatsAxis *xAxis, StatsAxis *yAxis) :
+	ChartLineItem(view, ChartZValue::ChartFeatures, color, histogramMarkerWidth),
+	xAxis(xAxis), yAxis(yAxis),
+	val(val), horizontal(horizontal)
+{
+}
+
+void HistogramMarker::updatePosition()
+{
+	if (!xAxis || !yAxis)
+		return;
+	if (horizontal) {
+		double y = yAxis->toScreen(val);
+		auto [x1, x2] = xAxis->minMaxScreen();
+		setLine(QPointF(x1, y), QPointF(x2, y));
+	} else {
+		double x = xAxis->toScreen(val);
+		auto [y1, y2] = yAxis->minMaxScreen();
+		setLine(QPointF(x, y1), QPointF(x, y2));
+	}
+}