On 2010-06-23 11:33, Brian Rowlands (Greymouth High School) wrote:
> Novice but eager to learn. I'm writing a login script which displays a
> GUI window and which I want to update with comments as the script runs.
My preferred pattern for this, especially on Windows, is to use threads.
The main thread must run the GTK main loop, while background threads do
the processing.
First thing to note, is that you have to enable threading in pygtk
before starting. Use this pattern:
import gtk, gobject, threading
window = load_my_window() # or whatever
thread = threading.Thread(target=my_processing_function)
thread.start()
gtk.gdk.threads_init()
with gtk.gdk.lock():
gtk.main()
The next thing is that background threads must not make calls directly
to GTK, or your app will lock up. Instead, use gobject.idle_add to tell
GTK to run a function in the UI thread, and do your GTK calls in that
function:
def ui_thread_append_message(message):
with gtk.gdk.lock:
XXX add code here to display your message
return False
def ui_thread_complete():
with gtk.gdk.lock:
window.destroy()
gtk.main_quit()
def my_processing_function():
XXX do some stuff
gobject.idle_add(ui_thread_append_message, 'Hello World!')
XXX do some more stuff
gobject.idle_add(ui_thread_complete)
Post your code, or the important parts of it at least, if you can't get
this working and I'll have a look at it.
--
Tim Evans
Applied Research Associates NZ
http://www.aranz.com/
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