| Код |
bool QObject::connect ( const QObject * sender, const char * signal, const QObject * receiver, const char * method, Qt::ConnectionType type = Qt::AutoConnection )
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В методе QObject::connect() последний параметр отвечает за тип соединения, вот описание этого параметра:
| Код |
enum Qt::ConnectionType
This enum describes the types of connection that can be used between signals and slots. In particular, it determines whether a particular signal is delivered to a slot immediately or queued for delivery at a later time.Constant Value Description
Qt::AutoConnection 0 (default) If the signal is emitted from a different thread than the receiving object, the signal is queued, behaving as Qt::QueuedConnection. Otherwise, the slot is invoked directly, behaving as Qt::DirectConnection. The type of connection is determined when the signal is emitted.
Qt::DirectConnection 1 The slot is invoked immediately, when the signal is emitted.
Qt::QueuedConnection 2 The slot is invoked when control returns to the event loop of the receiver's thread. The slot is executed in the receiver's thread.
Qt::BlockingQueuedConnection 4 Same as QueuedConnection, except the current thread blocks until the slot returns. This connection type should only be used where the emitter and receiver are in different threads. Note: Violating this rule can cause your application to deadlock.
Qt::UniqueConnection 0x80 Same as AutoConnection, but the connection is made only if it does not duplicate an existing connection. i.e., if the same signal is already connected to the same slot for the same pair of objects, then the connection will fail. This connection type was introduced in Qt 4.6.
Qt::AutoCompatConnection 3 The default type when Qt 3 support is enabled. Same as AutoConnection but will also cause warnings to be output in certain situations. See Compatibility Signals and Slots for further information.
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Добавлено через 9 минут и 46 секунд
Если поставишь Qt::DirectConnection, то слот будет выполняться в потоке, который сделал emit
Если поставишь Qt::QueuedConnection, то слот будет выполняться в потоке, в котором определен слот. |
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