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@noamraph
Created January 9, 2014 12:00
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A module which lets you create a pygtk application which will start the running instance if being executed again. Based on http://askubuntu.com/a/171996/98448
"""
Allow an application to activate a running instance of itself instead of
starting another instance.
"""
import sys
import gtk
import dbus.service
from dbus.mainloop.glib import DBusGMainLoop
def _get_path(app_id):
return '/' + app_id.replace('.', '/')
def listen_for_activation(app_id, window):
"""
Listen for 'activate' events. If one is sent, activate 'window'.
"""
class MyDBUSService(dbus.service.Object):
def __init__(self, window):
self.window = window
bus_name = dbus.service.BusName(app_id, bus=dbus.SessionBus())
dbus.service.Object.__init__(self, bus_name, _get_path(app_id))
@dbus.service.method(app_id)
def activate(self):
print "The process was activated by another instance."
self.window.present()
DBusGMainLoop(set_as_default=True)
_myservice = MyDBUSService(window)
def activate_if_already_running(app_id):
"""
Activate the existing window if it's already running. Return True if found
an existing window, and False otherwise.
"""
bus = dbus.SessionBus()
try:
programinstance = bus.get_object(app_id, _get_path(app_id))
activate = programinstance.get_dbus_method('activate', app_id)
except dbus.exceptions.DBusException:
return False
else:
print "A running process was found. Activating it."
activate()
return True
finally:
bus.close()
def test():
APP_ID = 'com.example.myapp'
activated = activate_if_already_running(APP_ID)
if activated:
sys.exit(0)
w = gtk.Window()
b = gtk.Button("Hello!")
b.set_size_request(200, 200)
w.add(b)
w.connect('delete-event', gtk.main_quit)
w.show_all()
listen_for_activation(APP_ID, w)
gtk.main()
if __name__ == '__main__':
test()
@mivoligo
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Hi, can I modify your code and use it in my application? If yes, what license is it on?

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