QGraphicsItem::scenePos() or pos()

**Gopala Krishna** · 8th February 2007, 13:05

This may sound like dumb simple question but I rather felt its better to clarify.
I am 100% sure that I am not using "parent - children" amongst QGraphicsItems in my app. So is it better to use scenePos() or pos() ? Any performance differences ?

**Gopala Krishna** · 11th February 2007, 19:06

Is there absolutely no answer from anyone?

**jpn** · 11th February 2007, 19:14

It should be quite easy to judge:

Qt Code:

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QPointF QGraphicsItem::pos() const
{
    return d_ptr->pos; // returns a member variable of the private implementation class (the pos is maintained while moving the item)
}
 
QPointF QGraphicsItem::scenePos() const
{
    return mapToScene(0, 0); // uses QMatrix to map (0,0) to scene coords
}

QPointF QGraphicsItem::pos() const
{
    return d_ptr->pos; // returns a member variable of the private implementation class (the pos is maintained while moving the item)
}

QPointF QGraphicsItem::scenePos() const
{
    return mapToScene(0, 0); // uses QMatrix to map (0,0) to scene coords
}

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