QGraphicsLineItem line is not at the center of the item

[sasmaster]

I am drawing a QGraphicsLineItem line at the middle of the scene in QGraphicsView .But the lines doesn't appear at the (0,0) It has an offset of 5 pixels from the center on X axis.How do I align the line to be at it's bounds center?

Here is my code:

@

QGraphicsLineItem *scrubber = new QGraphicsLineItem(0,0,0,100);

scrubber->setPen(QPen(QColor(255,0,0,255)));
gview->scene()->addItem(scrubber);

scrubber->setPos(0.0f,0);

@

[msue]

Possible reasons:
a) x=0 is not in the center of the graphics scene's sceneRect. You may e.g. have an additional horizontal line from x=-5 to x=15 units.
b) the graphics scene is not displayed in the center of the graphics view.
c) the graphics view is displayed with a margin.

[sasmaster]

Thanks.But how do I check these things?

[Asperamanca]

First, check the QGraphicsView's alignment property.
Then, read the sceneRect of the QGraphicsScene. If you only added the one line, it should be exactly big enough to hold that line.