On Wed, 22 Sep 2004 19:04:19 +0200
Danny Milosavljevic <[EMAIL PROTECTED]> threw this fish to the penguins:
>
> Am Mittwoch, den 22.09.2004, 12:51 -0400 schrieb george young:
> > [pygtk-1.99.17 , gtk+-2.2.4, python-2.3.3]
> > >From my "Print View" menu callback I want to run a screengrab:
> >
> > ag = gtk.AccelGroup()
> > self.itemf = gtk.ItemFactory(gtk.MenuBar, "<main>", ag)
> > self.topwin.add_accel_group(ag)
> > menu_items = ((('/_File/_Print View', '<control>V', self.print_view, 21, '')))
> > self.itemf.create_items(menu_items)
> >
> > def print_view(self, dummy, unused):
> > parent_win = self.topwin.window.get_parent()
> > os.system("convert -page 588x740-14+335 X:0x%x 'PS2:|lpr'" %
> > self.topwin.window.xid)
> >
> > [the "convert" linux command is from the ImageMagick package; very handy]
> >
> > When I select the menu item, the menu disappears, but the underlying
> > window is not repainted until the menu callback returns. Thus the window
> > I'm trying to print is partially obscured while the screengrab is taking
> > place. Is there something I can do in
> > the menu callback to force the mainwindow to repaint? I tried putting in
> > a time.sleep(1) and gtk.gdk.flush() but those did not help.
> >
> > The function works OK when called via the menu accelerator key sequence,
> > since the menu does not pop down and there's no obscuration.
> > But I have a lot of naive users that are not comfortble with accelerators.
>
> you should add the function as a idle callback with gtk.idle_add and
> there probably try running gtk.main_iteration()...
>
> (untested)
>
> def idle_cb():
> while gtk.events_pending(): gtk.main_iteration()
> parent_win = self.topwin.window.get_parent()
> os.system("convert -page 588x740-14+335 X:0x%x 'PS2:|lpr'" %
> self.topwin.window.xid)
>
> def print_view(self, dummy, unused):
> gtk.idle_add(idle_cb)
>
> if you want to be fancy you can also connect to the "hide" or "unmap"
> signal of the gtk.Menu that is shown and do the idle_add there. Then
> technically the menu should be gone. To make the main window repaint the
> main_iteration stuff should be enough.
The simple solution works fine, so I'll stick with that.
Thanks very much!
-- George Young
--
"Are the gods not just?" "Oh no, child.
What would become of us if they were?" (CSL)
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