Wnck example

hello_wnck.py

#!/usr/bin/env python

import gi
gi.require_version("Wnck", "3.0")
from gi.repository import Wnck, Gdk, GLib


def on_window_destroy(screen, window):
    print(screen, window)


def on_window_opened(screen, window):
    if not window:
        return
    print("Opened: ", window.get_name())


def on_active_window_changed(screen, window):
    active_window = screen.get_active_window()
    if not active_window:
        return
    print("Actived: ", active_window.get_name())


def main():
    Gdk.init([])
    loop = GLib.MainLoop.new(None, False)
    screen = Wnck.Screen.get_default()

    screen.connect("window-opened", on_window_opened)
    screen.connect("active-window-changed", on_active_window_changed)
    screen.connect("window-closed", on_window_destroy)

    loop.run()


if __name__ == "__main__":
    main()