Qt 4.8: QtDBus module

Qt Reference Documentation

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# QtDBus module

The QtDBus module is a Unix-only library that you can use to perform Inter-Process Communication using the D-Bus protocol. More...

## Namespaces

QDBus | Contains miscellaneous identifiers used throughout the QtDBus library

## Classes

QDBusAbstractAdaptor | The base class of D-Bus adaptor classes
QDBusAbstractInterface | The base class for all D-Bus interfaces in the QtDBus binding, allowing access to remote interfaces
QDBusArgument | Used to marshall and demarshall D-Bus arguments
QDBusConnection | Represents a connection to the D-Bus bus daemon
QDBusConnectionInterface | Access to the D-Bus bus daemon service
QDBusContext | Allows slots to determine the D-Bus context of the calls
QDBusError | Represents an error received from the D-Bus bus or from remote applications found in the bus
QDBusInterface | Proxy for interfaces on remote objects
QDBusMessage | Represents one message sent or received over the D-Bus bus
QDBusObjectPath | Enables the programmer to identify the OBJECT_PATH type provided by the D-Bus typesystem
QDBusPendingCall | Refers to one pending asynchronous call
QDBusPendingCallWatcher | Convenient way for waiting for asynchronous replies
QDBusPendingReply | Contains the reply to an asynchronous method call
QDBusReply | Stores the reply for a method call to a remote object
QDBusServiceWatcher | Allows the user to watch for a bus service change
QDBusSignature | Enables the programmer to identify the SIGNATURE type provided by the D-Bus typesystem
QDBusUnixFileDescriptor | Holds one Unix file descriptor
QDBusVariant | Enables the programmer to identify the variant type provided by the D-Bus typesystem

## Detailed Description

Applications using the QtDBus module can provide services to other, remote applications by exporting objects, as well as use services exported by those applications by placing calls and accessing properties.

The QtDBus module provides an interface that extends the Qt Signals and Slots mechanism, allowing one to connect to a signal emitted remotely as well as to connect a local signal to remote slot.

To use this module, use the following code in your application:

     #include <QtDBus>

If you're using qmake to build your application, you can add this line to your .pro file to make it link against the QtDBus libraries:

     QT += dbus

Note: The source code for this module is located in the `src/qdbus` directory. When installing Qt from source, this module is built when Qt's tools are built.

See the D-Bus page for detailed information on how to use this module.

This module is part of all Qt editions.