Hello.
I've read in the list archives that QtDBus is not wrapped because there
would be severe limitations in the bindings, and a more pythonic version
of the bindings exists (dbus-python).
However, I'm having trouble with exporting an interface using those
bindings. I've started with the example-service.py file that comes with
dbus-python, and I've changed it to be a Qt mini-app with the following
diff (full file attached):
--- example-service.py~
+++ example-service.py
@@ -30,11 +30,13 @@
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
-import gobject
+import sys
import dbus
import dbus.service
-import dbus.mainloop.glib
+import dbus.mainloop.qt
+
+from PyQt4 import QtGui
class DemoException(dbus.DBusException):
_dbus_error_name = 'com.example.DemoException'
@@ -71,13 +73,13 @@
if __name__ == '__main__':
- dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
+ dbus.mainloop.qt.DBusQtMainLoop(set_as_default=True)
session_bus = dbus.SessionBus()
name = dbus.service.BusName("com.example.SampleService", session_bus)
object = SomeObject(session_bus, '/SomeObject')
- mainloop = gobject.MainLoop()
- print "Running example service."
- print usage
- mainloop.run()
+ app = QtGui.QApplication(sys.argv)
+ mw = QtGui.QMainWindow()
+ mw.show()
+ app.exec_()
The application starts, with this warning:
QSocketNotifier: Can only be used with threads started with QThread
QSocketNotifier: Can only be used with threads started with QThread
qdbus lists the service, but trying to lists its objects hangs, and
sending a message does not work either:
% qdbus | grep example
com.example.SampleService
% qdbus com.example.SampleService
/
Cannot introspect object / at com.example.SampleService:
org.freedesktop.DBus.Error.NoReply (Did not receive a reply. Possible causes
include: the remote application did not send a reply, the message bus security
policy blocked the reply, the reply timeout expired, or the network connection
was broken.)
% qdbus com.example.SampleService /SomeObject
com.example.SampleInterface.HelloWorld hello
Interface 'com.example.SampleInterface' not available in object /SomeObject at
com.example.SampleService:
org.freedesktop.DBus.Error.NoReply (...)
Any ideas?
--
Adeodato Simó dato at net.com.org.es
Debian Developer adeodato at debian.org
People are more violently opposed to fur than leather because it's safer to
harass rich women than motorcycle gangs.
#!/usr/bin/env python
usage = """Usage:
python example-service.py &
python example-client.py
python example-async-client.py
python example-client.py --exit-service
"""
# Copyright (C) 2004-2006 Red Hat Inc. <http://www.redhat.com/>
# Copyright (C) 2005-2007 Collabora Ltd. <http://www.collabora.co.uk/>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use, copy,
# modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
import sys
import dbus
import dbus.service
import dbus.mainloop.qt
from PyQt4 import QtGui
class DemoException(dbus.DBusException):
_dbus_error_name = 'com.example.DemoException'
class SomeObject(dbus.service.Object):
@dbus.service.method("com.example.SampleInterface",
in_signature='s', out_signature='as')
def HelloWorld(self, hello_message):
print (str(hello_message))
return ["Hello", " from example-service.py", "with unique name",
session_bus.get_unique_name()]
@dbus.service.method("com.example.SampleInterface",
in_signature='', out_signature='')
def RaiseException(self):
raise DemoException('The RaiseException method does what you might '
'expect')
@dbus.service.method("com.example.SampleInterface",
in_signature='', out_signature='(ss)')
def GetTuple(self):
return ("Hello Tuple", " from example-service.py")
@dbus.service.method("com.example.SampleInterface",
in_signature='', out_signature='a{ss}')
def GetDict(self):
return {"first": "Hello Dict", "second": " from example-service.py"}
@dbus.service.method("com.example.SampleInterface",
in_signature='', out_signature='')
def Exit(self):
mainloop.quit()
if __name__ == '__main__':
dbus.mainloop.qt.DBusQtMainLoop(set_as_default=True)
session_bus = dbus.SessionBus()
name = dbus.service.BusName("com.example.SampleService", session_bus)
object = SomeObject(session_bus, '/SomeObject')
app = QtGui.QApplication(sys.argv)
mw = QtGui.QMainWindow()
mw.show()
app.exec_()
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