Added a 'Depth' Axis that knows how to add its strings on screen.

The CartesianAxis used a simple method to put things on screen
which is wrong for almost any case besides the 'current value here'
since we store things in milimeters on the axis, we need to convert those
to meters before showing on the profile.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/profile/divecartesianaxis.cpp

@@ -178,3 +178,8 @@ void DiveCartesianAxis::setColor(const QColor& color)
 	defaultPen.setCosmetic(true);
 	setPen(defaultPen);
 }
+
+QString DepthAxis::textForValue(double value)
+{
+	return get_depth_string(value, false, false);
+}

qt-ui/profile/divecartesianaxis.h

@@ -43,4 +43,9 @@ protected:
 	QColor textColor;
 };
 
+class DepthAxis : public DiveCartesianAxis {
+protected:
+    QString textForValue(double value);
+};
+
 #endif