The QDBusAbstractInterface class is the base class for all D-Bus interfaces in the Qt D-Bus binding, allowing access to remote interfaces 更多...
| 头： | #include <QDBusAbstractInterface> |
| qmake: | QT += dbus |
| Since: | Qt 4.2 |
| 继承： | QObject |
| 继承者： | QDBusConnectionInterface and QDBusInterface |
| virtual | ~QDBusAbstractInterface () |
| QDBusPendingCall | asyncCall (const QString & method , const QVariant & arg1 = QVariant(), const QVariant & arg2 = QVariant(), const QVariant & arg3 = QVariant(), const QVariant & arg4 = QVariant(), const QVariant & arg5 = QVariant(), const QVariant & arg6 = QVariant(), const QVariant & arg7 = QVariant(), const QVariant & arg8 = QVariant()) |
| QDBusPendingCall | asyncCallWithArgumentList (const QString & method , const QList<QVariant> & args ) |
| QDBusMessage | call (const QString & method , const QVariant & arg1 = QVariant(), const QVariant & arg2 = QVariant(), const QVariant & arg3 = QVariant(), const QVariant & arg4 = QVariant(), const QVariant & arg5 = QVariant(), const QVariant & arg6 = QVariant(), const QVariant & arg7 = QVariant(), const QVariant & arg8 = QVariant()) |
| QDBusMessage | call (QDBus::CallMode mode , const QString & method , const QVariant & arg1 = QVariant(), const QVariant & arg2 = QVariant(), const QVariant & arg3 = QVariant(), const QVariant & arg4 = QVariant(), const QVariant & arg5 = QVariant(), const QVariant & arg6 = QVariant(), const QVariant & arg7 = QVariant(), const QVariant & arg8 = QVariant()) |
| QDBusMessage | callWithArgumentList (QDBus::CallMode mode , const QString & method , const QList<QVariant> & args ) |
| bool | callWithCallback (const QString & method , const QList<QVariant> & args , QObject * receiver , const char * returnMethod , const char * errorMethod ) |
| bool | callWithCallback (const QString & method , const QList<QVariant> & args , QObject * receiver , const char * slot ) |
| QDBusConnection | connection () const |
| QString | interface () const |
| bool | isValid () const |
| QDBusError | lastError () const |
| QString | path () const |
| QString | service () const |
| void | setTimeout (int timeout ) |
| int | timeout () const |
The QDBusAbstractInterface class is the base class for all D-Bus interfaces in the Qt D-Bus binding, allowing access to remote interfaces
Generated-code classes also derive from QDBusAbstractInterface , all methods described here are also valid for generated-code classes. In addition to those described here, generated-code classes provide member functions for the remote methods, which allow for compile-time checking of the correct parameters and return values, as well as property type-matching and signal parameter-matching.
另请参阅 The QDBus compiler and QDBusInterface .
[虚拟]
QDBusAbstractInterface::
~QDBusAbstractInterface
()
Releases this object's resources.
Calls the method method on this interface and passes the parameters to this function to the method.
The parameters to
call
are passed on to the remote function via D-Bus as input arguments. The returned
QDBusPendingCall
object can be used to find out information about the reply.
This function can be used with up to 8 parameters, passed in arguments arg1 , arg2 , arg3 , arg4 , arg5 , arg6 , arg7 and arg8 . If you need more than 8 parameters or if you have a variable number of parameters to be passed, use asyncCallWithArgumentList ().
It can be used the following way:
QString value = retrieveValue(); QDBusPendingCall pcall = interface->asyncCall(QLatin1String("Process"), value); QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pcall, this); QObject::connect(watcher, SIGNAL(finished(QDBusPendingCallWatcher*)), this, SLOT(callFinishedSlot(QDBusPendingCallWatcher*)));
This example illustrates function calling with 0, 1 and 2 parameters and illustrates different parameter types passed in each (the first call to
"ProcessWorkUnicode"
will contain one Unicode string, the second call to
"ProcessWork"
will contain one string and one byte array).
该函数在 Qt 4.5 引入。
Places a call to the remote method specified by method on this interface, using args as arguments. This function returns a QDBusPendingCall object that can be used to track the status of the reply and access its contents once it has arrived.
Normally, you should place calls using asyncCall ().
注意： 此函数是 thread-safe .
该函数在 Qt 4.5 引入。
Calls the method method on this interface and passes the parameters to this function to the method.
The parameters to
call
are passed on to the remote function via D-Bus as input arguments. Output arguments are returned in the
QDBusMessage
reply. If the reply is an error reply,
lastError
() will also be set to the contents of the error message.
This function can be used with up to 8 parameters, passed in arguments arg1 , arg2 , arg3 , arg4 , arg5 , arg6 , arg7 and arg8 . If you need more than 8 parameters or if you have a variable number of parameters to be passed, use callWithArgumentList ().
It can be used the following way:
QString value = retrieveValue(); QDBusMessage reply; QDBusReply<int> api = interface->call(QLatin1String("GetAPIVersion")); if (api >= 14) reply = interface->call(QLatin1String("ProcessWorkUnicode"), value); else reply = interface->call(QLatin1String("ProcessWork"), QLatin1String("UTF-8"), value.toUtf8());
This example illustrates function calling with 0, 1 and 2 parameters and illustrates different parameter types passed in each (the first call to
"ProcessWorkUnicode"
will contain one Unicode string, the second call to
"ProcessWork"
will contain one string and one byte array).
这是重载函数。
Calls the method
method
on this interface and passes the parameters to this function to the method. If
mode
is
NoWaitForReply
, then this function will return immediately after placing the call, without waiting for a reply from the remote method. Otherwise,
mode
indicates whether this function should activate the Qt Event Loop while waiting for the reply to arrive.
This function can be used with up to 8 parameters, passed in arguments arg1 , arg2 , arg3 , arg4 , arg5 , arg6 , arg7 and arg8 . If you need more than 8 parameters or if you have a variable number of parameters to be passed, use callWithArgumentList ().
If this function reenters the Qt event loop in order to wait for the reply, it will exclude user input. During the wait, it may deliver signals and other method calls to your application. Therefore, it must be prepared to handle a reentrancy whenever a call is placed with call ().
Places a call to the remote method specified by method on this interface, using args as arguments. This function returns the message that was received as a reply, which can be a normal QDBusMessage::ReplyMessage (indicating success) or QDBusMessage::ErrorMessage (if the call failed). The mode parameter specifies how this call should be placed.
If the call succeeds, lastError () will be cleared; otherwise, it will contain the error this call produced.
Normally, you should place calls using call ().
警告：
若使用
UseEventLoop
, your code must be prepared to deal with any reentrancy: other method calls and signals may be delivered before this function returns, as well as other Qt queued signals and events.
注意： 此函数是 thread-safe .
Places a call to the remote method specified by method on this interface, using args as arguments. This function returns immediately after queueing the call. The reply from the remote function is delivered to the returnMethod on object receiver . If an error occurs, the errorMethod on object receiver is called instead.
此函数返回
true
if the queueing succeeds. It does not indicate that the executed call succeeded. If it fails, the
errorMethod
is called. If the queueing failed, this function returns
false
and no slot will be called.
The returnMethod must have as its parameters the types returned by the function call. Optionally, it may have a QDBusMessage parameter as its last or only parameter. The errorMethod 必须拥有 QDBusError as its only parameter.
该函数在 Qt 4.3 引入。
另请参阅 QDBusError and QDBusMessage .
这是重载函数。
This function is deprecated. Please use the overloaded version.
Places a call to the remote method specified by method on this interface, using args as arguments. This function returns immediately after queueing the call. The reply from the remote function or any errors emitted by it are delivered to the slot slot on object receiver .
此函数返回
true
if the queueing succeeded: it does not indicate that the call succeeded. If it failed, the slot will be called with an error message.
lastError
() will not be set under those circumstances.
另请参阅 QDBusError and QDBusMessage .
Returns the connection this interface is associated with.
Returns the name of this interface.
返回
true
if this is a valid reference to a remote object. It returns
false
if there was an error during the creation of this interface (for instance, if the remote application does not exist).
Note: when dealing with remote objects, it is not always possible to determine if it exists when creating a QDBusInterface .
Returns the error the last operation produced, or an invalid error if the last operation did not produce an error.
Returns the object path that this interface is associated with.
Returns the name of the service this interface is associated with.
Sets the timeout in milliseconds for all future DBus calls to timeout . -1 means the default DBus timeout (usually 25 seconds).
该函数在 Qt 4.8 引入。
另请参阅 timeout ().
Returns the current value of the timeout in milliseconds. -1 means the default DBus timeout (usually 25 seconds).
该函数在 Qt 4.8 引入。
另请参阅 setTimeout ().