Abstract base class of an event signal. More...

#include <WSignal.h>

Inheritance diagram for Wt::EventSignalBase:

Public Member Functions
const char *	name () const
	Returns the event name.

virtual bool	isConnected () const override
	Returns whether this signal is connected.

void	disconnect (JSlot &slot)
	Disconnects a JSlot.

void	preventDefaultAction (bool prevent=true)
	Prevents the default browser action.

bool	defaultActionPrevented () const
	Returns whether the default browser action is prevented.

void	preventPropagation (bool prevent=true)
	Prevents event propagation.

bool	propagationPrevented () const
	Returns whether event propagation is prevented.

virtual Wt::Signals::connection	connect (WObject *target, WObject::Method method)=0
	Connects to a slot.

template<class T , class V >
Wt::Signals::connection	connect (T target, void(V::method)())
	Connects to a slot.

Public Member Functions inherited from Wt::SignalBase
template<class T , class V >
Wt::Signals::connection	connect (T target, void(V::method)())
	Connects to a slot.

Detailed Description

Abstract base class of an event signal.

An event signal is directly associated with a user-interface generated event.

Member Function Documentation

◆ connect() [1/2]

template<class T , class V >

Wt::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).

◆ connect() [2/2]

virtual Wt::Signals::connection Wt::SignalBase::connect	(	WObject *	target,
		WObject::Method	method
	)

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).

Implements Wt::SignalBase.

Reimplemented in Wt::JSignal< A >, Wt::JSignal< ::int64_t >, Wt::JSignal< ::uint64_t >, Wt::JSignal< A... >, Wt::JSignal< bool >, Wt::JSignal< double >, Wt::JSignal< double, double >, Wt::JSignal< int >, Wt::JSignal< int, int >, Wt::JSignal< int, int, int, int >, Wt::JSignal< int, int, std::string, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< int, int, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string >, Wt::JSignal< std::string, std::string >, Wt::JSignal< std::string, std::string, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string, std::string, Wt::WTouchEvent >, Wt::JSignal< Wt::WGoogleMap::Coordinate >, Wt::JSignal< Wt::WTouchEvent >, and Wt::JSignal<>.

◆ defaultActionPrevented()

bool Wt::EventSignalBase::defaultActionPrevented ( ) const

Returns whether the default browser action is prevented.

See also: preventDefaultAction()

◆ isConnected()

bool Wt::EventSignalBase::isConnected ( ) const

overridevirtual

Returns whether this signal is connected.

Returns true when the signal was connected to to at least one slot.

Implements Wt::SignalBase.

Reimplemented in Wt::JSignal< A >, Wt::JSignal< ::int64_t >, Wt::JSignal< ::uint64_t >, Wt::JSignal< A... >, Wt::JSignal< bool >, Wt::JSignal< double >, Wt::JSignal< double, double >, Wt::JSignal< int >, Wt::JSignal< int, int >, Wt::JSignal< int, int, int, int >, Wt::JSignal< int, int, std::string, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< int, int, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string >, Wt::JSignal< std::string, std::string >, Wt::JSignal< std::string, std::string, std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string, std::string, Wt::WMouseEvent >, Wt::JSignal< std::string, std::string, Wt::WTouchEvent >, Wt::JSignal< Wt::WGoogleMap::Coordinate >, Wt::JSignal< Wt::WTouchEvent >, Wt::JSignal<>, and Wt::EventSignal< E >.

◆ name()

const char * Wt::EventSignalBase::name ( ) const

Returns the event name.

The event name is implementation-defined.

◆ preventDefaultAction()

void Wt::EventSignalBase::preventDefaultAction ( bool prevent = true )

Prevents the default browser action.

Use this method to prevent the default browser action associated with this event.

See also: setPreventPropagation()

◆ preventPropagation()

void Wt::EventSignalBase::preventPropagation ( bool prevent = true )

Prevents event propagation.

Use this method to prevent that the event propagates further to its ancestors.

See also: preventDefaultAction()

◆ propagationPrevented()

bool Wt::EventSignalBase::propagationPrevented ( ) const

Returns whether event propagation is prevented.

See also: preventPropagation()

Public Member Functions