Re: [newbie] How to plot to drawing_area

[Roland Smith <rsmith xs4all nl>]

On Mon, 3 Feb 2003 14:04:26 -0300
"Individual . ." <individual@mi.cl> wrote:


> > :-( Especially if you want it to work on all available colordepths etc.
> 
> Yes, from what I've seen in the tutorials... one has to get one's brain 
> around all available colourdepths. Ergh.

Well, nowadays you'll probably get fewer complaints if you say "only works on 24
or 16 bits colordepth". Certainly for a scientific app.

> > For me, I would only use Xlib if I was on a platform that was slow or 
> > very
> > resource constrained, and if a proper GUI was not necessary, i.e. you 
> > just want
> > to show a picture or movie.
> >
> 
> Yes, it's sort of that but from another point of view: I want the 
> greatest speed in displaying the image, and hopefully that it won't 
> impact the calculation that is being run behind it (this will be for a 
> scientific app).

GdkRGB is pretty fast. but you could deploy the GUI from a different process if
you do now want it to impede the app. Look at g_spawn_async_with_pipes() in the
Glib manual. Just spawn the GUI, write the RGB data to the pipe, and have the
GUI process read and display it.

> And yes, a GUI won't be necessary. I *may* add a palette in a separate  
> floating window with "Quit" "Save" "Close" in the future. That's why I 
> turned to Gtk initially (and besides, I decided that it was about time 
> that

If you might want a GUI later, then don't implement in xlib now, or you'll be
rewiting it later. :-)

Roland
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