PyGTK and gnome-screensaver?

[Tahakki]

Simple enough question, really - is there a way to turn a PyGTK program into screensaver with gnome-screensaver?

[Tahakki]

Bump!

[LemursDontExist]

Hi Tahakki,

You can, in fact, make a gnome screensaver using pygtk. You have to create a custom gtk window which uses os.environ['XSCREENSAVER_WINDOW'] as the handle for its gdk window. Here's the code I used that worked:


class GsThemeWindow(gtk.Window):
__gtype_name__ = 'GsThemeWindow'

def __init__(self):
super(GsThemeWindow, self).__init__()
self.connect("destroy", gtk.main_quit)

def do_realize(self):
ident = os.environ.get('XSCREENSAVER_WINDOW')
if not ident is None:
self.window = gtk.gdk.window_foreign_new(int(ident, 16))
self.window.set_events(gtk.gdk.EXPOSURE_MASK |
gtk.gdk.STRUCTURE_MASK)
x, y, w, h, depth = self.window.get_geometry()
self.size_allocate(gtk.gdk.Rectangle(x, y, w, h))
self.set_default_size(w, h)
self.set_decorated(False)
else:
self.window = gtk.gdk.Window(
self.get_parent_window(),
width=self.allocation.width,
height=self.allocation.height,
window_type=gtk.gdk.WINDOW_TOPLEVEL,
wclass=gtk.gdk.INPUT_OUTPUT,
event_mask=self.get_events() | gtk.gdk.EXPOSURE_MASK)
self.window.set_user_data(self)
self.style.attach(self.window)
self.set_flags(self.flags() | gtk.REALIZED)

The else block is so that you can run the program in a normal window for testing, etc.

If you use a GsThemeWindow as your main application window, everything should work. You will also need to create a .desktop file - I suggest modifying one of the ones in /usr/share/applications/screensavers/.

Anyway, I spent hours trying to figure this out, so I hope this saves you some time! Let me know if you have any other questions!