Struct qt_core::QChildEvent

#[repr(C)]
pub struct QChildEvent { /* private fields */ }

The QChildEvent class contains event parameters for child object events.

C++ class: QChildEvent.

C++ documentation:

The QChildEvent class contains event parameters for child object events.

Child events are sent immediately to objects when children are added or removed.

In both cases you can only rely on the child being a QObject (or, if QObject::isWidgetType() returns true, a QWidget). This is because in the QEvent::ChildAdded case the child is not yet fully constructed; in the QEvent::ChildRemoved case it might have already been destructed.

The handler for these events is QObject::childEvent().

Implementations

impl QChildEvent

pub unsafe fn added(&self) -> bool

Returns true if type() is QEvent::ChildAdded; otherwise returns false.

Calls C++ function: bool QChildEvent::added() const.

C++ documentation:

Returns true if type() is QEvent::ChildAdded; otherwise returns false.

pub unsafe fn child(&self) -> QPtr<QObject>

Returns the child object that was added or removed.

Calls C++ function: QObject* QChildEvent::child() const.

C++ documentation:

Returns the child object that was added or removed.

pub unsafe fn copy_from( &self, other: impl CastInto<Ref<QChildEvent>> ) -> Ref<QChildEvent>

The QChildEvent class contains event parameters for child object events.

Calls C++ function: QChildEvent& QChildEvent::operator=(const QChildEvent& other).

C++ documentation:

The QChildEvent class contains event parameters for child object events.

Child events are sent immediately to objects when children are added or removed.

In both cases you can only rely on the child being a QObject (or, if QObject::isWidgetType() returns true, a QWidget). This is because in the QEvent::ChildAdded case the child is not yet fully constructed; in the QEvent::ChildRemoved case it might have already been destructed.

The handler for these events is QObject::childEvent().

pub unsafe fn new( type_: Type, child: impl CastInto<Ptr<QObject>> ) -> CppBox<QChildEvent>

Constructs a child event object of a particular type for the child.

Calls C++ function: [constructor] void QChildEvent::QChildEvent(QEvent::Type type, QObject* child).

C++ documentation:

Constructs a child event object of a particular type for the child.

type can be QEvent::ChildAdded, QEvent::ChildRemoved, or QEvent::ChildPolished.

See also child().

pub unsafe fn new_copy( other: impl CastInto<Ref<QChildEvent>> ) -> CppBox<QChildEvent>

The QChildEvent class contains event parameters for child object events.

Calls C++ function: [constructor] void QChildEvent::QChildEvent(const QChildEvent& other).

C++ documentation:

The QChildEvent class contains event parameters for child object events.

Child events are sent immediately to objects when children are added or removed.

In both cases you can only rely on the child being a QObject (or, if QObject::isWidgetType() returns true, a QWidget). This is because in the QEvent::ChildAdded case the child is not yet fully constructed; in the QEvent::ChildRemoved case it might have already been destructed.

The handler for these events is QObject::childEvent().

pub unsafe fn polished(&self) -> bool

Returns true if type() is QEvent::ChildPolished; otherwise returns false.

Calls C++ function: bool QChildEvent::polished() const.

C++ documentation:

Returns true if type() is QEvent::ChildPolished; otherwise returns false.

pub unsafe fn removed(&self) -> bool

Returns true if type() is QEvent::ChildRemoved; otherwise returns false.

Calls C++ function: bool QChildEvent::removed() const.

C++ documentation:

Returns true if type() is QEvent::ChildRemoved; otherwise returns false.

Methods from Deref<Target = QEvent>

pub unsafe fn accept(&self)

Sets the accept flag of the event object, the equivalent of calling setAccepted(true).

Calls C++ function: void QEvent::accept().

C++ documentation:

Sets the accept flag of the event object, the equivalent of calling setAccepted(true).

Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget.

See also ignore().

pub unsafe fn copy_from(&self, other: impl CastInto<Ref<QEvent>>) -> Ref<QEvent>

Calls C++ function: QEvent& QEvent::operator=(const QEvent& other).

pub unsafe fn ignore(&self)

Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).

Calls C++ function: void QEvent::ignore().

C++ documentation:

Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).

Clearing the accept parameter indicates that the event receiver does not want the event. Unwanted events might be propagated to the parent widget.

See also accept().

pub unsafe fn is_accepted(&self) -> bool

the accept flag of the event object

Calls C++ function: bool QEvent::isAccepted() const.

C++ documentation:

the accept flag of the event object

Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget. By default, isAccepted() is set to true, but don't rely on this as subclasses may choose to clear it in their constructor.

For convenience, the accept flag can also be set with accept(), and cleared with ignore().

Access functions:

bool	isAccepted() const
void	setAccepted(bool accepted)

pub unsafe fn set_accepted(&self, accepted: bool)

the accept flag of the event object

Calls C++ function: void QEvent::setAccepted(bool accepted).

C++ documentation:

the accept flag of the event object

Setting the accept parameter indicates that the event receiver wants the event. Unwanted events might be propagated to the parent widget. By default, isAccepted() is set to true, but don't rely on this as subclasses may choose to clear it in their constructor.

For convenience, the accept flag can also be set with accept(), and cleared with ignore().

Access functions:

bool	isAccepted() const
void	setAccepted(bool accepted)

pub unsafe fn spontaneous(&self) -> bool

Returns true if the event originated outside the application (a system event); otherwise returns false.

Calls C++ function: bool QEvent::spontaneous() const.

C++ documentation:

Returns true if the event originated outside the application (a system event); otherwise returns false.

The return value of this function is not defined for paint events.

pub unsafe fn type_(&self) -> Type

Returns the event type.

Calls C++ function: QEvent::Type QEvent::type() const.

C++ documentation:

Returns the event type.

Trait Implementations

impl CppDeletable for QChildEvent

unsafe fn delete(&self)

Calls C++ function: virtual [destructor] void QChildEvent::~QChildEvent().

impl Deref for QChildEvent

fn deref(&self) -> &QEvent

Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr).

type Target = QEvent

The resulting type after dereferencing.

impl DynamicCast<QChildEvent> for QEvent

unsafe fn dynamic_cast(ptr: Ptr<QEvent>) -> Ptr<QChildEvent>

Calls C++ function: QChildEvent* dynamic_cast<QChildEvent*>(QEvent* ptr).

impl StaticDowncast<QChildEvent> for QEvent

unsafe fn static_downcast(ptr: Ptr<QEvent>) -> Ptr<QChildEvent>

Calls C++ function: QChildEvent* static_cast<QChildEvent*>(QEvent* ptr).

impl StaticUpcast<QEvent> for QChildEvent

unsafe fn static_upcast(ptr: Ptr<QChildEvent>) -> Ptr<QEvent>

Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr).