Hi,
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.
>
> -- George Young
cheers,
Danny
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