Re: GtkProgressBar state update issue

[Nikolaj Thygesen <mailinglist diamondbox dk>]

Timofei Istomin wrote:
> Hello,
> I'm developing an embedded application using GTK+ (2.16.6) on the DirectFB
> backend.
>
> I use the gtk_progress_bar_set_fraction() to set the progress value, but it
> doesn't affect the visible state of the widget until the touchscreen is
> tapped.
>
> Other GUI elements (buttons and text entries) are all working, so I presume
> that the glib main loop is OK.
> The gtk_progress_bar_set_fraction() is called by a separate thread.
>
> I suspect it can be a windowing issue, I don't use any window manager, the
> application consists of several fullscreen windows that are switched by
> gtk_widget_hide() and _show() functions. Is it correct?
>
> Thanks.
> Timofei Istomin.
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>
>   
You are really asking for trouble doing this! I have wasted sooo much 
time doing basically what you are doing now, and if I get the time, I 
might dig up some sources. I've got it working now. Threads and gtk just 
don't mix very well!
I believe my solution was doing something along the lines of:

if(gtk_main_level() && is_this_the_main_thread())
while(gtk_events_pending()) gtk_main_iteration();


... you need to manually iterate the main loop, but only if you're 
executing within the context of the ui thread.


N :o)