Re: GUI freeze and long blocking operation

[jcupitt gmail com]

On 12 June 2013 01:52, Kip Warner <kip thevertigo com> wrote:
> My GtkAssistant on one page in particular performs a long operation
> which would otherwise block the GUI from refreshing, if it were not for
> intermittent...
>
>         while Gtk.events_pending():
>             Gtk.main_iteration()
>
> To start the long work, the "prepare" signal is captured in my
> assistant and the long job ("startDiscVerification()") method is
> enqueued via GObject.idle_add() in the onPrepare() method.

Do you need to use idle_add()?

I have a Progress class I use to draw a progress bar on the screen and
show a spinner and all that. It does the while pending / iterate thing
too. My code looks something like:

init:
  photo = gtk.Button('RTI Capture ...')
  photo.connect('clicked', self.rti_capture_cb, None)

rti_capture_cb:
  mark gui insensitive
  enable progress feedback

  while long_job():
    do a bit of work
    self.progress.update(percent)

  hide progress feedback
  mark gui active again

Code here, if it's any help:

https://github.com/jcupitt/rtiacquire

John