Re: How to update the interface?

["MERT TUGCU" <merttugcu hotmail com>]

Thanks for the replies. I took a look at the docs today. It's mentioned 
there that I can use gdk_threads_enter() / gdk_threads_leave() + gdk_flush() 
commands. The first enter and leave pair should be used when you want to 
make a function call and wrap that function with these commands. I tried 
that first in my application. It worked in some small function calls and 
didn't work out for long functions that have long process time. Inside the 
functions, I used the gdk_flush() to update the labels or textview widget, 
however it didn't work out. Nothing is updated in the interface.
You also suggested me to use threads. My question at that point is, say if I 
had a lot of parameters to pass to that function or thread, what would I do 
in that case? How can I update the interface members inside that thread 
then?

Isn't there a simple way to block the running process outside of the 
interface thread, update the interface members or elements, then continue 
the process?



> From: Paul Davis <pjdavis engineering uiowa edu>
> To: MERT TUGCU <merttugcu hotmail com>
> CC: gtkmm-list gnome org
> Subject: Re: How to update the interface?
> Date: Thu, 13 Oct 2005 02:01:05 -0500
>
> MERT TUGCU wrote:
>
> > Hi everyone,
> >
> >
> >
> > In my interface, I have button that is used to process an image. Since the 
> > process takes some time, the button is either left pressed, does not pop 
> > back during process or nothing happens. Is there any way to finish 
> > updating the interface first then finishing the call to a function? Also I 
> > have a textview widget I use in my application to show the user what steps 
> > are taken during the process. During the process, it doesn?t update (or 
> > print the text buffer) the textview widget also. Lastly, I would like to 
> > use the textview widget pretty much like a terminal. For example, how can 
> > I do like: textview_object << ?string? << an integer << an stl vector << 
> > endl; so that I can print my stl vector variables or integers etc.
> >
> > Thank you for your response in advance,
> >
> >
> > _______________________________________________
> > gtkmm-list mailing list
> > gtkmm-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
> There are conflicting opinions on how exactly to update the UI and process 
> some method at the same time. I say use threads. Others said process the 
> method and periodically clear the event queue for the UI. I say use 
> threads.
>
> As for the textview, take a look at the docs. Its something like 
> textview->get_buffer()->set_text( string text ) ;
>
> Cheers,
> Paul