[Gtk-sharp-list] ProgressBar connected to process

[Christian Hoff]

glacialfury wrote:
> Hi,
>
> I'm experimenting with small programs to learn my way around GTK programming
> with C#/mono.  In this case, I have a GUI with three elements: a Button, a
> TextView, and a ProgressBar.  Pressing the button runs an external process
> ("ping -c 4 localhost") and displays the output in the textview.  This works
> perfectly.
>
> I next attempted to "tie" this in with a progress bar, because there is no
> indicator that it is pinging until it finishes the command and posts the
> output.  I have been unable to find any useful tutorials or examples for
> this kind of work.  So ...
>
> 1) Is it possible to tie a progress bar to a process?  I.e., it starts to
> pulse when the process starts, and ceases to pulse when the process
> finishes?  
> ..... while (Process is running) { ProgressBar.pulse(); }
>   
I think .net has the possibility to execute a process and wait until it 
is terminated. Add a GLib.Timeout(similar to a timer, but the method 
will be called from the Gtk+ main loop) before you execute the process. 
The method associated with the Timeout should call the Pulse method. 
After the process has finished running, you can remove the timeout.
> 2) If I were to then build two commands (and two progress bars) in to the
> program, would they have to be run in separate threads if I wanted them to
> be processed at the same time?
>   
Yes, that would probably be the easiest solution. Remeber that only the 
Gtk+ thread can access the GUI, see 
http://www.mono-project.com/Responsive_Applications.