statistics: improve placement of info-box

The info box was placed either above or below the mouse-pointer.
If the pointer is at the center and the infobox higher than
half the chart, it would cross the border. Detect this case
and place the info box at the center.

Same logic for right/left, though that should typically not
happen.

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

1 files changed, 12 insertions, 4 deletions

diff --git a/stats/informationbox.cpp b/stats/informationbox.cpp
index 706035f93..727b6fe83 100644
--- a/stats/informationbox.cpp
+++ b/stats/informationbox.cpp
@@ -40,11 +40,19 @@ void InformationBox::setPos(QPointF pos)
 	QRectF plotArea = chart->plotArea();
 
 	double x = pos.x() + distanceFromPointer;
-	if (x + width >= plotArea.right() && pos.x() - width >= plotArea.x())
-		x = pos.x() - width;
+	if (x + width >= plotArea.right()) {
+		if (pos.x() - width >= plotArea.x())
+			x = pos.x() - width;
+		else
+			x = pos.x() - width / 2.0;
+	}
 	double y = pos.y() + distanceFromPointer;
-	if (y + height >= plotArea.bottom() && pos.y() - height >= plotArea.y())
-		y = pos.y() - height;
+	if (y + height >= plotArea.bottom()) {
+		if (pos.y() - height >= plotArea.y())
+			y = pos.y() - height;
+		else
+			y = pos.y() - height / 2.0;
+	}
 
 	setRect(x, y, width, height);
 	double actY = y + 2.0 * informationBorder;