From: Paul Lutus <nospam@...>
Date: 2006-12-03T20:35:11+09:00
Subject: Re: Gtk::ProgressBar set_fraction doesn't work

Patrick Plattes wrote:

> Hello,
> 
> i have some problems with the Gtk::ProgressBar. I download a file and i
> want to show a progressbar. The method below creates a new dialog with a
> bar and starts the download for each file. The puts-line work very well
> and i can see a dialog, there is no update. Does anybody know whats
> going wrong?

The thread in which your process is running, that would update the progress
bar, is busy downloading your file, so it cannot update the progressbar
dislay. This is a very common problem, normally solved by creating a
separate thread to perform the download, thus freeing the display thread to
perform updates. Unfortunately, because of how threads are implemented in
Ruby, this approach often doesn't work.

I have not had any success updating progress bars using worker threads and
the Qt GUI library, you may have a different experience with
GTk:ProgressBar.

-- 
Paul Lutus
http://www.arachnoid.com