Connection Class
(QMetaObject::Connection)| Header: | #include <Connection> |
| qmake: | QT += core |
Public Functions
| Connection() | |
| Connection(const Connection &other) | |
| Connection(Connection &&o) | |
| ~Connection() | |
| bool | operator bool() const |
| Connection & | operator=(const Connection &other) |
| Connection & | operator=(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 Connection &other)
Create a copy of the handle to the other connection
Connection::Connection(Connection &&o)
Move-constructs a Connection instance, making it point to the same object that o was pointing to.
Connection::~Connection()
Destructor for QMetaObject::Connection.
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.
Connection &Connection::operator=(const Connection &other)
Assigns other to this connection and returns a reference to this connection.
Connection &Connection::operator=(Connection &&other)
Move-assigns other to this object, and returns a reference.
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