statistics: fix chart features: regression line and median/mean

The coordinates of these were calculated when creating the feature.
This is wrong, because the min/max values of the axes can change
on resize to get "nice" number. Therefore, recalculate after resizing.
This means that the general "LineMarker" class has to be split into
two classes, one for regression lines and one for median/mean
markers.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/stats/statsaxis.cpp b/stats/statsaxis.cpp
index 3bdb8e427..ebd41fb94 100644
--- a/stats/statsaxis.cpp
+++ b/stats/statsaxis.cpp
@@ -52,6 +52,12 @@ std::pair<double, double> StatsAxis::minMax() const
 	return { min, max };
 }
 
+std::pair<double, double> StatsAxis::minMaxScreen() const
+{
+	return horizontal ? std::make_pair(zeroOnScreen, zeroOnScreen + size)
+			  : std::make_pair(zeroOnScreen, zeroOnScreen - size);
+}
+
 void StatsAxis::setRange(double minIn, double maxIn)
 {
 	min = minIn;