- class QDBusInterface¶
The
QDBusInterface
class is a proxy for interfaces on remote objects. More…Synopsis¶
Methods¶
def
__init__()
Note
This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE
Detailed Description¶
Warning
This section contains snippets that were automatically translated from C++ to Python and may contain errors.
QDBusInterface
is a generic accessor class that is used to place calls to remote objects, connect to signals exported by remote objects and get/set the value of remote properties. This class is useful for dynamic access to remote objects: that is, when you do not have a generated code that represents the remote interface.Calls are usually placed by using the
call()
function, which constructs the message, sends it over the bus, waits for the reply and decodes the reply. Signals are connected to by using the normal QObject::connect() function. Finally, properties are accessed using the QObject::property() and QObject::setProperty() functions.The following code snippet demonstrates how to perform a mathematical operation of
"2 + 2"
in a remote application calledcom.example.Calculator
, accessed via the session bus.QDBusInterface remoteApp( "com.example.Calculator", "/Calculator/Operations", "org.mathematics.RPNCalculator" ) remoteApp.call( "PushOperand", 2 ) remoteApp.call( "PushOperand", 2 ) remoteApp.call( "ExecuteOperation", "+" ) reply = remoteApp.call( "PopOperand" ) if reply.isValid(): printf( "%d", reply.value() ) # prints 4
See also
DBus signals can be captured with string-based connections (see Specifying Signals and Slots by Method Signature Strings).
- __init__(service, path[, interface=""[, connection=QDBusConnection.sessionBus()[, parent=None]]])¶
- Parameters:
service – str
path – str
interface – str
connection –
QDBusConnection
parent –
QObject
Creates a dynamic
QDBusInterface
object associated with the interfaceinterface
on object at pathpath
on serviceservice
, using the givenconnection
. Ifinterface
is an empty string, the object created will refer to the merging of all interfaces found by introspecting that object. Otherwise ifinterface
is not empty, theQDBusInterface
object will be cached to speedup further creations of the same interface.parent
is passed to the base class constructor.If the remote service
service
is not present or if an error occurs trying to obtain the description of the remote interfaceinterface
, the object created will not be valid (seeisValid()
).