[Qt-interest] A little confusion about co-ordinates while working with QGraphicsView

[Usman Ajmal]

Hi,

I have a little confusion about QGraphicsView and the co-ordinates of my
shapes (e.g. a rectangle) in it. I hope someone may clear it out to me.

Geometery of my graphics view is     graphicsView->setGeometry(QRect(10, 10,
710, 540));

This mean Width  = 710 - 10 = 700
and           Height = 540 - 10 = 530

As 700/2 = 350 and 530/2 = 265 and because i want to set my scene equal to
the height and width of graphicsView. Therefore i set my scene as:

        scene->setSceneRect(-350,-265,700,530);

Now i want to draw a rectangle os some size (say 50) and want it be drawn
such that its top-left corner appears at top-left corner of my graphicsView
so i wrote following lines of code
           sqMap *square = new sqMap(50);
           square->setPos(-350,-265);

By doing so nothing appears but by setting position as under i get my
rectangle at the desired location.

           square->setPos(-353,-6);

Can anyone please guide me what the point here i am missing? I hope the
bounding rectangle is not creating any problem here.

Thanks.
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