[Interest] Help with segfault when drawing Bezier curve

[Rollastre Prostrit]

On 09/16/2012 06:25 PM, Gopalakrishna Bhat wrote:
> Hi,
>
> On Sun, Sep 16, 2012 at 9:44 PM, Shriramana Sharma <samjnaa at gmail.com 
> <mailto:samjnaa at gmail.com>> wrote:
>
>     Hello.
>
>     I'm working on some stuff involving bezier curves and wanted to write
>     my own bezier display applet to keep in handy, so that I can adjust
>     the nodes and handles and it would show me real-time what the
>     resultant curve looks like.
>
>     However I am running into some curious segfault even with a minimal
>     bezier display. I've attached the code that produces it. (FWIW this
>     code is under the GPL since I'm developing more of this in PyQt under
>     the GPL.) I hope someone can help me resolve the problem.
>
> QPainter in the paintEvent for BeizerWidget should not be static. 
> Remove that.
Yes, probably your QPainter is deleted after first paintEvent is 
processed and hence you can see the curve for a fraction of the second 
before your app crashes on a second paintEvent.
>
>     I am using Qt 4.8.1 on Kubuntu Precise.
>
>     --
>     Shriramana Sharma
>
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>
> With regards,
> Gopalakrishna
>
>
> -- 
> My blog http://gkbhat.blogspot.com
>
>
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