QGraphicsLineItem line is not at the center of the item
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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:
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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);
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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. -
Thanks.But how do I check these things?
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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.