Ok! I'll look into it soon and will paste some code if I still haven't get it right.

BTW: is it possible to add a mouse event handler without subclassing and override the event handler? sometimes it'll be cleaner.


On Wed, Sep 18, 2013 at 9:18 AM, Stas Boukarev <stassats@gmail.com> wrote:
Rujia Liu <rujia.liu@gmail.com> writes:

> Hi!
>
> I want to implement a AutoCAD-like zoom in/out behavior and found this:
>
> http://www.qtcentre.org/threads/35738-How-to-zooming-like-in-AutoCAD-with-QGraphicsView
>
> I tried to use scale+centerOn (also in wheel event) but it doesn't work. It
> is scaled properly but does NOT center on the given point. Is there any
> workaround?
That got to be a qt problem, unless something specific doesn't
work. You'll need to paste the code to diagnose it further.

--
With best regards, Stas.