profile: set axis in constructor of TankItem

There is no point in a separate set-axis function if we never
change the axis anyway. Make the axis a const-reference to
show that it can never be changed.

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

1 files changed, 2 insertions, 3 deletions

diff --git a/profile-widget/tankitem.h b/profile-widget/tankitem.h
index f3e0c0238..fb94dc481 100644
--- a/profile-widget/tankitem.h
+++ b/profile-widget/tankitem.h
@@ -11,14 +11,13 @@
 class TankItem : public QGraphicsRectItem
 {
 public:
-	explicit TankItem();
-	void setHorizontalAxis(DiveCartesianAxis *horizontal);
+	explicit TankItem(const DiveCartesianAxis &axis);
 	void setData(struct plot_info *plotInfo, struct dive *d);
 
 private:
 	void createBar(int startTime, int stopTime, struct gasmix gas);
 	void replot();
-	DiveCartesianAxis *hAxis;
+	const DiveCartesianAxis &hAxis;
 	int plotEndTime;
 	QBrush air, nitrox, oxygen, trimix;
 	QList<QGraphicsRectItem *> rects;