Position the X and Y labels of the Rulers

Position the X and Y labels of the rulers, this way
it's a bit more clear the deepness and the length
of the trip. It's still not the best approach, but
I'm getting close.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

qt-ui/diveplanner.cpp

@@ -673,21 +673,38 @@ void DiveHandler::mousePressEvent(QGraphicsSceneMouseEvent* event)
 
 void Ruler::setMaximum(double maximum)
 {
+	maxText->setText(QString::number(maximum));
+	if(orientation == Qt::Horizontal)
+		maxText->setPos( line().x2(), line().y2() -5 );
+	else
+		maxText->setPos( line().x1() - 50, line().y2());
 	max = maximum;
 }
 
 void Ruler::setMinimum(double minimum)
 {
+	minText->setText(QString::number(minimum));
+	if(orientation == Qt::Horizontal)
+		minText->setPos( line().x1(), line().y2() -5 );
+	else
+		minText->setPos( line().x1() - 50, line().y1());
 	min = minimum;
 }
 
-Ruler::Ruler() : orientation(Qt::Horizontal)
+Ruler::Ruler() : orientation(Qt::Horizontal),
+minText(new QGraphicsSimpleTextItem(this)),
+maxText(new QGraphicsSimpleTextItem(this))
 {
+	minText->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+	maxText->setFlag(QGraphicsItem::ItemIgnoresTransformations);
 }
 
 void Ruler::setOrientation(Qt::Orientation o)
 {
 	orientation = o;
+	// position the elements on the screen.
+	setMinimum(minimum());
+	setMaximum(maximum());
 }
 
 void Ruler::updateTicks()

qt-ui/diveplanner.h

@@ -99,6 +99,8 @@ public:
 private:
 	Qt::Orientation orientation;
 	QList<QGraphicsLineItem*> ticks;
+	QGraphicsSimpleTextItem *minText;
+	QGraphicsSimpleTextItem *maxText;
 	double min;
 	double max;
 	double interval;