Connection Class
class QMetaObject::ConnectionPublic Functions
Connection() | |
Connection(const QMetaObject::Connection &other) | |
Connection(QMetaObject::Connection &&o) | |
~Connection() | |
void | swap(QMetaObject::Connection &other) |
bool | operator bool() const |
QMetaObject::Connection & | operator=(const QMetaObject::Connection &other) |
QMetaObject::Connection & | operator=(QMetaObject::Connection &&other) |
Detailed Description
Represents a handle to a signal-slot (or signal-functor) connection.
It can be used to check if the connection is valid and to disconnect it using QObject::disconnect(). For a signal-functor connection without a context object, it is the only way to selectively disconnect that connection.
As Connection is just a handle, the underlying signal-slot connection is unaffected when Connection is destroyed or reassigned.
Member Function Documentation
Connection::Connection()
Creates a Connection instance.
Connection::Connection(const QMetaObject::Connection &other)
Create a copy of the handle to the other connection
[noexcept]
Connection::Connection(QMetaObject::Connection &&o)
Move-constructs a Connection instance, making it point to the same object that o was pointing to.
[noexcept]
Connection::~Connection()
Destructor for QMetaObject::Connection.
[noexcept]
void Connection::swap(QMetaObject::Connection &other)
Swaps this Connection instance with other. This operation is very fast and never fails.
bool Connection::operator bool() const
Returns true
if the connection is valid.
The connection is valid if the call to QObject::connect succeeded. The connection is invalid if QObject::connect was not able to find the signal or the slot, or if the arguments do not match.
QMetaObject::Connection &Connection::operator=(const QMetaObject::Connection &other)
Assigns other to this connection and returns a reference to this connection.
[noexcept]
QMetaObject::Connection &Connection::operator=(QMetaObject::Connection &&other)
Move-assigns other to this object, and returns a reference.