Ruby gtk2: button.sensitive = false - events still queue

Question

I use a button on my ruby gtk2 app which starts a longish job processing and I want to disable the button while processing so that the user can't accidentally run it twice. I figured setting button.sensitive = false would do the job and tested it with the following code:

button.signal_connect(:clicked) do
  button.sensitive = false
  puts "clicked"
  sleep 5
  button.sensitive = true
end

Clicking on the button after the job has started still seems to put :clicked events on the stack so if I click the button twice more during the sleep, 'clicked' is displayed three times in the console window when I expected it would appear only once.

Do I misunderstand how this is meant to work? If it won't work the way I expect, is there a way to clear the event stack once the job is finished?

Answer 1

Thank you, Torimus - pointed me in the right direction. Apparently it helps if you read the documentation, specifically that of Gtk.events_pending?! Added the following after setting button.sensitive to force the main loop to do its thing:

while Gtk.events_pending? do
  Gtk.main_iteration
end