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

[Chandru...]

if sqMap is graphicsItem ... it will positioned on QGraphicsScene logical
coordinates only ...

are u reimplementing  resize event ...  if so check

fitInView(scene->sceneRect(), Qt::KeepAspectRatio);



On Tue, Jul 14, 2009 at 6:03 PM, Usman Ajmal <uzmanajmal at gmail.com> wrote:

> 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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