[pygtk] Yet another threads problem

[Mystilleef]

Calling Dialog's run method in a thread will crash your app. I learned
the hard way (weeks of debugging). I use Windows instead of Dialogs
now. Manage showing and hiding the window yourself.

Cheers

On Feb 18, 2008 7:26 AM, Steve McClure <smcclure at racemi.com> wrote:
>
>
> On Feb 18, 2008, at 7:19 AM, Adolfo González Blázquez wrote:
>
> > El sáb, 16-02-2008 a las 14:19 +1300, John Stowers escribió:
> >> On Fri, 2008-02-15 at 14:05 +0100, Adolfo González Blázquez wrote:
> >>> Hello,
> >>>
> >>> I'm writing a little app that needs 2 windows, a main window, and
> >>> another for entering data. I'm writing it using Glade, so both
> >>> windows
> >>> are defined in one glade file. The second one, emulates a entry
> >>> dialog,
> >>> and is modal.
> >>>
> >>> My problem is that i want the second window displayed when i
> >>> click in a
> >>> button in the main window, and then, when i press "Close" in the
> >>> second
> >>> window, get the text and do some things, and update the main window
> >>> status bar.
> >>
> >> I dont quite understand you here, it doesnt sound like a threads
> >> issue,
> >> more a design issue.
> >>
> >> When I want to return stuff from a dialog I typically create my own
> >> dialog subclass [1] which returns a tuple of the dialog specific
> >> information from the (overridden run method). For example (excuse
> >> broken
> >> pseudocode)
> >>
> >> class MyDialog(gtk.Dialog)
> >>      def __init__(self, setting1, setting2, setting3)
> >>          #call super
> >>          #save old settings
> >>          self.oldsetting1 = setting1
> >>          ...etc
> >>          #construct dialog
> >>          self.widget1 = gtk.Entry()
> >>          self.widget1.set_text(setting1)
> >>          ...etc
> >>
> >>      def run(self):
> >>          if gtk.Dialog.run(self) == gtk.RESPONSE_OK:
> >>               setting1 = self.widget1.get_text()
> >>               setting2 = self.widget2.get_text()
> >>               setting3 = self.widget3.get_text()
> >>               return setting1, setting2, setting3
> >>          else:
> >>               return self.oldsetting1, self.oldsettin2,
> >> self.oldsetting3
> >>
> >> then run it with
> >> dialog = MyDialog(a,b,c)
> >> a,b,c = dialog.run()
> >> dialog.distroy()
> >
> > Well, I've subclassed gtk.Dialog as you point, and I'm still having
> > the
> > same issue.
> >
> > I run the dialog, enter the data and click OK. Then it was supposed to
> > hide the dialog, and update the statusbar while things are happening,
> > but in fact the gui freezes till the end.
>
> Dialog.run() is the "problem".
> From
> http://www.pygtk.org/pygtk2reference/class-gtkdialog.html#method-
> gtkdialog--run
> "The run() method blocks in a recursive main loop until the dialog
> either emits the "response" signal, or is destroyed"
>
> To get the behavior you want, you need to set up a callback for the
> OK button which fetches the text and performs the desired action.
>
>
> >
> > The related code is here:
> > http://pastebin.com/mb2ea398
> >
> > And a screencast of what is happening in here:
> > http://www.infinicode.org/code/out.ogg
> >
> > Any idea?
> >
> >>
> >> Regards,
> >>
> >> John
> >>
> >> [1] http://davyd.livejournal.com/237414.html
> >>
> >>>
> >>> Here's a screencast of what i'm doing:
> >>> http://www.infinicode.org/code/out.ogg
> >>>
> >>> What it was supposed to do is:
> >>> - Open the add window
> >>> - Enter the text and click close
> >>> - The add window closes
> >>> - In the main window status bar appears "Conectando..."
> >>> - The status bar changes to "Conectado!"
> >>> - A error dialog appers
> >>>
> >>> Relevant code here:
> >>> http://pastebin.com/f6bf4e71b
> >>>
> >>>
> >>> Thanks in advance for any help
> >>>
> >>> -- adolfo
> >>> _______________________________________________
> >>> pygtk mailing list   pygtk at daa.com.au
> >>> http://www.daa.com.au/mailman/listinfo/pygtk
> >>> Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
> >>
> > _______________________________________________
> > pygtk mailing list   pygtk at daa.com.au
> > http://www.daa.com.au/mailman/listinfo/pygtk
> > Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
>
> --
> Steve McClure
> smcclure at racemi.com
>
>
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