Re: GUI app design questions

[Vinod Joseph <diana vinod gmail com>]

Hi David

Does the graphing package have any special modules for network
performance analysis ? Something like TraceGraph ......

Thank you

Joe

On Apr 1, 2005 3:16 PM, Richard Gipps <rgipps netspace net au> wrote:
> David,
>          There is also a very good graphing package lumped in with some
> other stuff called GTKExtra http://gtkextra.sourceforge.net/  It may at
> first glance look like the package hasn't been updated for a while but if
> you check the mailing list you will see there is activity and the CVS
> sources are being updated regularly.
>
> Richard.
>
> At 15:45 31/03/05, you wrote:
> > I been developing mostly on embedded Linux platforms for the last eight
> > years (mostly soft realtime stuff).  I have a lot of experience on Linux
> > in general, but have never developed a GUI application for X.
> > I chose GTK simply because, from the outside, it appears to have the
> > same programming style as me.
> >
> > I need to develop a software signal processing program.  It goes
> > generally like this:
> >
> > 1. High speed data comes in on a capture card.
> > 2. The data goes through several algorithm modules.
> > 3. Result is pumped back out a different card, or captured for analysis.
> >
> > What the GUI needs to do is to act like either a spectrum analyzer or an
> > O-Scope at the input and output of the algorithm modules.  All of the
> > underlying stuff I can handle but I have a few GTK/GUI design questions,
> > that if I could get answered would, speed up my learning curve and
> > development time.
> >
> > Questions:
> > 1. I'm not used to giving up program flow by calling gtk_main.  I see
> > there is a function to interrupt gtk_main in a timely manner, is there
> > also a function to interrupt gtk_main when a file handle becomes
> > available?  Or more likely a series of file handles (like the select
> > function)?
> >
> > 2. Obviously I have to do a lot of drawing and displaying graphics.
> > What I want is to be able to draw in a window just like the old Borland
> > BGI interface.  I realize that this sort of direct pixel access is not
> > allowed under the GTK (or 'X') model. So considering that my graphic is
> > not going to be a particular file format (PNG, BMP, etc), what widget
> > would lend itself to this kind of display.  I'm not sure this is clear,
> > but basically I'm thinking I will draw my waveforms in a buffer and tell
> > the widget about the buffer and then display it.
> >
> > 3.  The data is going to be coming in hot and heavy, obviously even
> > direct control of the display is not going to keep up.  Is there a way
> > to tell when the "drawing" of the widget is complete, so that I can tell
> > if its time to draw another buffer, and display?
> >
> > Thanks for your time...
> > --
> > David L. Martin <w0snj arrl net>
> > http://www.kc2lcf.net
> >
> > Welcome to the shallow end of the Internet!
> >
> > _______________________________________________
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> > gtk-app-devel-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
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