The QSignal class can be used to send signals for classes that don't inherit QObject. Más...

#include <qsignal.h>

Diagrama de herencias de QSignal

Señales
void	signal (const QVariant &)
void	intSignal (int)
void	signal (const QVariant &)
void	intSignal (int)
Métodos públicos
	QSignal (QObject parent=0, const char name=0)
	~QSignal ()
bool	connect (const QObject receiver, const char member)
bool	disconnect (const QObject receiver, const char member=0)
void	activate ()
bool	isBlocked () const
void	block (bool b)
void	setParameter (int value)
int	parameter () const
void	setValue (const QVariant &value)
QVariant	value () const
	QSignal (QObject parent=0, const char name=0)
	~QSignal ()
bool	connect (const QObject receiver, const char member)
bool	disconnect (const QObject receiver, const char member=0)
void	activate ()
bool	isBlocked () const
void	block (bool b)
void	setParameter (int value)
int	parameter () const
void	setValue (const QVariant &value)
QVariant	value () const

Descripción detallada

The QSignal class can be used to send signals for classes that don't inherit QObject.

If you want to send signals from a class that does not inherit QObject, you can create an internal QSignal object to emit the signal. You must also provide a function that connects the signal to an outside object slot. This is how we have implemented signals in the QMenuData class, which is not a QObject.

In general, we recommend inheriting QObject instead. QObject provides much more functionality.

You can set a single QVariant parameter for the signal with setValue().

Note that QObject is a private base class of QSignal, i.e. you cannot call any QObject member functions from a QSignal object.

Example:

        #include <qsignal.h>

        class MyClass
        {
        public:
            MyClass();
            ~MyClass();

            void doSomething();

            void connect( QObject *receiver, const char *member );

        private:
            QSignal *sig;
        };

        MyClass::MyClass()
        {
            sig = new QSignal;
        }

        MyClass::~MyClass()
        {
            delete sig;
        }

        void MyClass::doSomething()
        {
            // ... does something
            sig->activate(); // emits the signal
        }

        void MyClass::connect( QObject *receiver, const char *member )
        {
            sig->connect( receiver, member );
        }

Documentación del constructor y destructor

QSignal::QSignal	(	QObject *	parent = `0`,
		const char *	name = `0`
	)

Constructs a signal object called name, with the parent object parent. These arguments are passed directly to QObject.

QSignal::~QSignal ( )

Destroys the signal. All connections are removed, as is the case with all QObjects.

QSignal::QSignal	(	QObject *	parent = `0`,
		const char *	name = `0`
	)

QSignal::~QSignal ( )

Documentación de las funciones miembro

void QSignal::activate ( )

Emits the signal. If the platform supports QVariant and a parameter has been set with setValue(), this value is passed in the signal.

void QSignal::activate ( )

void QSignal::block ( bool b ) [inline]

Blocks the signal if b is TRUE, or unblocks the signal if b is FALSE.

An activated signal disappears into hyperspace if it is blocked.

Ver también:: isBlocked(), activate(), QObject::blockSignals()

void QSignal::block ( bool b ) [inline]

bool QSignal::connect	(	const QObject *	receiver,
		const char *	member
	)

bool QSignal::connect	(	const QObject *	receiver,
		const char *	member
	)

Connects the signal to member in object receiver.

Ver también:: disconnect(), QObject::connect()

bool QSignal::disconnect	(	const QObject *	receiver,
		const char *	member = `0`
	)

Disonnects the signal from member in object receiver.

Ver también:: connect(), QObject::disconnect()

Reimplementado de QObject.

bool QSignal::disconnect	(	const QObject *	receiver,
		const char *	member = `0`
	)

Esta es una función miembro sobrecargada que se suministra por conveniencia. Difiere de la anterior función solamente en los argumentos que acepta.

Disconnects all signals in this object from receiver's member.

A signal-slot connection is removed when either of the objects involved are destroyed.

Reimplementado de QObject.

void QSignal::intSignal ( int t0 ) [signal]

void QSignal::intSignal ( int ) [signal]

bool QSignal::isBlocked ( ) const [inline]

Returns TRUE if the signal is blocked, or FALSE if it is not blocked.

The signal is not blocked by default.

Ver también:: block(), QObject::signalsBlocked()

bool QSignal::isBlocked ( ) const [inline]

int QSignal::parameter ( ) const

void QSignal::setParameter ( int value )

void QSignal::setValue ( const QVariant & value )

Sets the signal's parameter to value

void QSignal::signal ( const QVariant & ) [signal]

void QSignal::signal ( const QVariant & t0 ) [signal]

QVariant QSignal::value ( ) const

Returns the signal's parameter

La documentación para esta clase fue generada a partir de los siguientes ficheros:

src/qt/include/qsignal.h
src/qt/src/kernel/qsignal.h
src/qt/src/.moc/release-shared-mt/moc_qsignal.cpp
src/qt/src/kernel/qsignal.cpp

Señales

Métodos públicos

Descripción detallada

Documentación del constructor y destructor

Documentación de las funciones miembro