I am trying to get working a gtk.spinner using Pygobject in python. The main thing is that I use this element to show the user that a long time action is in progress. The problem is that the spinner stops when doing the function.
the code is here:
.....
def create_image(self,spinner):
....
spinner.start()
# Heavy function
spinner.stop()
.....
And this doesn't works. I would accept some help, thanks!
Your heavy function needs to occasionally let the GUI process accumulated events. For example, you can occasionally run:
while gtk.events_pending():
gtk.main_iteration()
Another option is for the heavy function to run in a separate thread, leaving the main thread to process the events and spin the spinner. In that case, you will need to redesign your create_image function to be asynchronous. For example:
def create_image(self, spinner, finishcb):
spinner.start()
def thread_run():
# call heavy here
heavy_ret = heavy()
gobject.idle_add(cleanup, heavy_ret)
def cleanup(heavy_ret):
spinner.stop()
t.join()
finishcb(heavy_ret)
# start "heavy" in a separate thread and immediately
# return to mainloop
t = threading.Thread(thread_run)
t.start()
Now, instead of calling create_image, you need to pass it a callback that will be called when the image is ready. I.e., instead of:
image = self.create_image(spinner)
you write:
self.create_image(spinner, self.store_created_image)
