gistfile1.rb

# make dialog respond
dialog.response(dialog.get_response(button))

# run events forward til non left
Gtk.main_iteration while Gtk.events_pending?

# check non are left
p Gtk.events_pending? 
#=> false (good)

# wait a minute
sleep 0.3

# check there are still no events.
p Gtk.events_pending? 
#=> true (what?)