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boost::signals::connection — Query/disconnect a signal-slot connection.
class connection { public: // construct/copy/destruct connection(); connection(const connection&); connection& operator=(const connection&); // connection management void disconnect() const; bool connected() const; // modifiers void swap(const connection&); // comparisons bool operator==(const connection&) const; bool operator<(const connection&) const; }; // specialized algorithms void swap(connection&, connection&);
The connection class represents a connection between a Signal and a Slot. It is a lightweight object that has the ability to query whether the signal and slot are currently connected, and to disconnect the signal and slot. It is always safe to query or disconnect a connection.
connection();
Effects:
Sets the currently represented connection to the
NULL connection.
Postconditions:
!this->connected().
Throws:
Will not throw.
connection(const connection& other);
Effects:
this references
the connection referenced by
other.
Throws:
Will not throw.
connection& operator=(const connection& other);
Effects:
this references
the connection referenced by
other.
Throws:
Will not throw.
void disconnect() const;
Effects:
If
this->connected(),
disconnects the signal and slot referenced by this;
otherwise, this operation is a no-op.
Postconditions:
!this->connected().
bool connected() const;
Returns:
true if this
references a non-NULL connection that is still active
(connected), and false
otherwise.
Throws:
Will not throw.
void swap(const connection& other);
Effects:
Swaps the connections referenced in
this and
other.
Throws:
Will not throw.
bool operator==(const connection& other) const;
Returns:
true if
this and
other reference the same
connection or both reference the NULL connection, and
false
otherwise.
Throws:
Will not throw.
bool operator<(const connection& other) const;
Returns:
true if the
connection referenced by
this precedes the
connection referenced by
other based on some
unspecified ordering, and
false
otherwise.
Throws:
Will not throw.
void swap(connection& x, connection& y);
Effects:
x.swap(y)
Throws:
Will not throw.
| Copyright © 2001-2004 Douglas Gregor |