Re: Drawing with cairo

[Theodore Papadopoulo <Theodore Papadopoulo sophia inria fr>]

Igor Gorbounov wrote:
> Diego A. Fons пишет:
>   
> > [...]
> > My question is if there is a way of preserve the cairo context intact 
> > between the the calls to on_expose_event()? Why getting the cairo 
> > context in the on_realize() handler and storing it in a variable doesn't 
> > work?
> >   
> >     
> Why, it works! Those are just examples. I use a context variable
> as a member of my Plot class, and this variable is assigned in
> an initialization method, and reassigned when plot area is resized.
>     Igor Gorbounov
>
>   
Strange because I have kind of the same experience as Diego...

At least using gtk-- and storing the cairo context obtained at
configure time (maybe not at realization time, I have tried many 
variants I do
not remember if I tried that variant), to use it in the handling of 
expose events
just did not work. I had to request a new cairo context for each expose 
events.

I never had time to fully investigate the problem, but I certainly had a 
similar experience...

   Theo.