Abstract base class of a signal. More...
Public Member Functions | |
WObject * | sender () const |
Returns the sender. | |
virtual bool | isConnected () const =0 |
Returns whether this signal is connected. | |
virtual boost::signals::connection | connect (WObject *target, WObject::Method method)=0 |
Connects to a slot. | |
template<class T , class V > | |
boost::signals::connection | connect (T *target, void(V::*method)()) |
Connects to a slot. |
Abstract base class of a signal.
Base class for all signals.
virtual boost::signals::connection Wt::SignalBase::connect | ( | WObject * | target, |
WObject::Method | method | ||
) | [pure virtual] |
Connects to a slot.
Every signal can be connected to a slot which does not take any arguments (and may thus ignore signal arguments).
Implemented in Wt::Signal< A1, A2, A3, A4, A5, A6 >, Wt::EventSignal< E >, Wt::Signal< WModelIndex >, Wt::Signal< WDate >, Wt::Signal< ::uint64_t,::uint64_t >, Wt::Signal< WModelIndex, WModelIndex >, Wt::Signal< int, WLength >, Wt::Signal< WRadioButton * >, Wt::Signal< double >, Wt::Signal<>, Wt::Signal< Orientation, int, int >, Wt::Signal< std::string >, Wt::Signal< int, int >, Wt::Signal< int64_t, int64_t >, Wt::Signal< Coordinate, NoClass >, Wt::Signal< int >, Wt::Signal< WModelIndex, int, int >, Wt::Signal< int, WFormWidget * >, Wt::Signal< void >, Wt::Signal< WMenuItem * >, Wt::Signal< T, A1 >, Wt::Signal< WModelIndex, WMouseEvent >, Wt::Signal< StandardButton >, Wt::Signal< WString >, Wt::Signal< int, NoClass >, Wt::Signal< bool >, Wt::Signal< DialogCode >, Wt::Signal< WWidget * >, Wt::Signal< WStandardItem * >, Wt::Signal< StandardButton, NoClass >, Wt::Signal< int, int, int, int >, Wt::Signal< WObject *, NoClass, NoClass, NoClass, NoClass, NoClass >, and Wt::Signal< WWidget *, bool >.
boost::signals::connection Wt::SignalBase::connect | ( | T * | target, |
void(V::*)() | method | ||
) |
Connects to a slot.
Every signal can be connected to a slot which does not take any arguments (and may thus ignore signal arguments).
Reimplemented in Wt::JSignal< A1, A2, A3, A4, A5, A6 >, Wt::Signal< A1, A2, A3, A4, A5, A6 >, Wt::EventSignal< E >, Wt::JSignal< Coordinate >, Wt::JSignal<>, Wt::JSignal< std::string, int >, Wt::JSignal< std::string >, Wt::JSignal< std::string, std::string, WMouseEvent, struct NoClass, struct NoClass, struct NoClass >, Wt::JSignal< int, int >, Wt::JSignal< int >, Wt::JSignal< void >, Wt::JSignal< int, int, std::string, std::string, WMouseEvent >, Wt::JSignal< std::string, int, std::string, std::string, std::string, WMouseEvent >, Wt::JSignal< std::string, int, std::string >, Wt::JSignal< bool >, Wt::JSignal< int, int, int, int >, Wt::JSignal< std::string, std::string >, Wt::Signal< WModelIndex >, Wt::Signal< WDate >, Wt::Signal< ::uint64_t,::uint64_t >, Wt::Signal< WModelIndex, WModelIndex >, Wt::Signal< int, WLength >, Wt::Signal< WRadioButton * >, Wt::Signal< double >, Wt::Signal<>, Wt::Signal< Orientation, int, int >, Wt::Signal< std::string >, Wt::Signal< int, int >, Wt::Signal< int64_t, int64_t >, Wt::Signal< Coordinate, NoClass >, Wt::Signal< int >, Wt::Signal< WModelIndex, int, int >, Wt::Signal< int, WFormWidget * >, Wt::Signal< void >, Wt::Signal< WMenuItem * >, Wt::Signal< T, A1 >, Wt::Signal< WModelIndex, WMouseEvent >, Wt::Signal< StandardButton >, Wt::Signal< WString >, Wt::Signal< int, NoClass >, Wt::Signal< bool >, Wt::Signal< DialogCode >, Wt::Signal< WWidget * >, Wt::Signal< WStandardItem * >, Wt::Signal< StandardButton, NoClass >, Wt::Signal< int, int, int, int >, Wt::Signal< WObject *, NoClass, NoClass, NoClass, NoClass, NoClass >, and Wt::Signal< WWidget *, bool >.
virtual bool Wt::SignalBase::isConnected | ( | ) | const [pure virtual] |
Returns whether this signal is connected.
Returns true when the signal was connected to to at least one slot.
Implemented in Wt::JSignal< A1, A2, A3, A4, A5, A6 >, Wt::Signal< A1, A2, A3, A4, A5, A6 >, Wt::EventSignalBase, Wt::EventSignal< E >, Wt::JSignal< Coordinate >, Wt::JSignal<>, Wt::JSignal< std::string, int >, Wt::JSignal< std::string >, Wt::JSignal< std::string, std::string, WMouseEvent, struct NoClass, struct NoClass, struct NoClass >, Wt::JSignal< int, int >, Wt::JSignal< int >, Wt::JSignal< void >, Wt::JSignal< int, int, std::string, std::string, WMouseEvent >, Wt::JSignal< std::string, int, std::string, std::string, std::string, WMouseEvent >, Wt::JSignal< std::string, int, std::string >, Wt::JSignal< bool >, Wt::JSignal< int, int, int, int >, Wt::JSignal< std::string, std::string >, Wt::Signal< WModelIndex >, Wt::Signal< WDate >, Wt::Signal< ::uint64_t,::uint64_t >, Wt::Signal< WModelIndex, WModelIndex >, Wt::Signal< int, WLength >, Wt::Signal< WRadioButton * >, Wt::Signal< double >, Wt::Signal<>, Wt::Signal< Orientation, int, int >, Wt::Signal< std::string >, Wt::Signal< int, int >, Wt::Signal< int64_t, int64_t >, Wt::Signal< Coordinate, NoClass >, Wt::Signal< int >, Wt::Signal< WModelIndex, int, int >, Wt::Signal< int, WFormWidget * >, Wt::Signal< void >, Wt::Signal< WMenuItem * >, Wt::Signal< T, A1 >, Wt::Signal< WModelIndex, WMouseEvent >, Wt::Signal< StandardButton >, Wt::Signal< WString >, Wt::Signal< int, NoClass >, Wt::Signal< bool >, Wt::Signal< DialogCode >, Wt::Signal< WWidget * >, Wt::Signal< WStandardItem * >, Wt::Signal< StandardButton, NoClass >, Wt::Signal< int, int, int, int >, Wt::Signal< WObject *, NoClass, NoClass, NoClass, NoClass, NoClass >, and Wt::Signal< WWidget *, bool >.
WObject* Wt::SignalBase::sender | ( | ) | const |
Returns the sender.
The sender usually corresponds to the owner, and is used by the WSignalMapper to associated sender-specific data.
During a slot invocation, you can access the sender from WObject::sender().