Fix a crash on changing dives when the ruler is used.

The ruler is a weird beast - it has two child objects that access the
parent to call another function, that call the child functions.

When I updated the plot_info I didn't take that into consideration, what
happened is that when I set the parent's plot_info, the children's
plot_info are still invalid, but the update method is called anyhow.

This patch updates all plot_info's before calling anything else.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/qt-ui/profile/ruleritem.h b/qt-ui/profile/ruleritem.h
index f2ff61c09..61eda1ed3 100644
--- a/qt-ui/profile/ruleritem.h
+++ b/qt-ui/profile/ruleritem.h
@@ -15,15 +15,16 @@ class RulerNodeItem2 : public QObject, public QGraphicsEllipseItem {
 	friend class RulerItem2;
 
 public:
-	explicit RulerNodeItem2(struct plot_info &info);
+	explicit RulerNodeItem2();
 	void setRuler(RulerItem2 *r);
+	void setPlotInfo(struct plot_info& info);
 	void recalculate();
 
 protected:
 	QVariant itemChange(GraphicsItemChange change, const QVariant &value);
 
 private:
-	struct plot_info &pInfo;
+	struct plot_info pInfo;
 	struct plot_data *entry;
 	RulerItem2 *ruler;
 	DiveCartesianAxis *timeAxis;