[−][src]Struct qt_core::QChildEvent
The QChildEvent class contains event parameters for child object events.
C++ class: QChildEvent
.
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().
Methods
impl QChildEvent
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pub unsafe fn added(&self) -> bool
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Returns true
if type() is QEvent::ChildAdded; otherwise returns false.
Calls C++ function: bool QChildEvent::added() const
.
Returns true
if type() is QEvent::ChildAdded; otherwise returns false.
pub unsafe fn child(&self) -> QMutPtr<QObject>
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Returns the child object that was added or removed.
Calls C++ function: QObject* QChildEvent::child() const
.
Returns the child object that was added or removed.
pub unsafe fn copy_from(
&mut self,
other: impl CastInto<Ref<QChildEvent>>
) -> MutRef<QChildEvent>
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&mut self,
other: impl CastInto<Ref<QChildEvent>>
) -> MutRef<QChildEvent>
The QChildEvent class contains event parameters for child object events.
Calls C++ function: QChildEvent& QChildEvent::operator=(const QChildEvent& other)
.
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<MutPtr<QObject>>
) -> CppBox<QChildEvent>
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type_: Type,
child: impl CastInto<MutPtr<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)
.
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>
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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)
.
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
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Returns true
if type() is QEvent::ChildPolished; otherwise returns false.
Calls C++ function: bool QChildEvent::polished() const
.
Returns true
if type() is QEvent::ChildPolished; otherwise returns false.
pub unsafe fn removed(&self) -> bool
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Returns true
if type() is QEvent::ChildRemoved; otherwise returns false.
Calls C++ function: bool QChildEvent::removed() const
.
Returns true
if type() is QEvent::ChildRemoved; otherwise returns false.
Methods from Deref<Target = QEvent>
pub unsafe fn accept(&mut self)
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Sets the accept flag of the event object, the equivalent of calling setAccepted(true).
Calls C++ function: void QEvent::accept()
.
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(
&mut self,
other: impl CastInto<Ref<QEvent>>
) -> MutRef<QEvent>
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&mut self,
other: impl CastInto<Ref<QEvent>>
) -> MutRef<QEvent>
Calls C++ function: QEvent& QEvent::operator=(const QEvent& other)
.
pub unsafe fn ignore(&mut self)
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Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).
Calls C++ function: void QEvent::ignore()
.
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
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the accept flag of the event object
Calls C++ function: bool QEvent::isAccepted() const
.
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(&mut self, accepted: bool)
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the accept flag of the event object
Calls C++ function: void QEvent::setAccepted(bool accepted)
.
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
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Returns true
if the event originated outside the application (a system event); otherwise returns false
.
Calls C++ function: bool QEvent::spontaneous() const
.
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
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Returns the event type.
Calls C++ function: QEvent::Type QEvent::type() const
.
Returns the event type.
Trait Implementations
impl CppDeletable for QChildEvent
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unsafe fn delete(&mut self)
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Calls C++ function: virtual [destructor] void QChildEvent::~QChildEvent()
.
impl Deref for QChildEvent
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type Target = QEvent
The resulting type after dereferencing.
fn deref(&self) -> &QEvent
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Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr)
.
impl DerefMut for QChildEvent
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fn deref_mut(&mut self) -> &mut QEvent
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Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr)
.
impl DynamicCast<QChildEvent> for QEvent
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unsafe fn dynamic_cast(ptr: Ptr<QEvent>) -> Ptr<QChildEvent>
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Calls C++ function: QChildEvent* dynamic_cast<QChildEvent*>(QEvent* ptr)
.
unsafe fn dynamic_cast_mut(ptr: MutPtr<QEvent>) -> MutPtr<QChildEvent>
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Calls C++ function: QChildEvent* dynamic_cast<QChildEvent*>(QEvent* ptr)
.
impl StaticDowncast<QChildEvent> for QEvent
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unsafe fn static_downcast(ptr: Ptr<QEvent>) -> Ptr<QChildEvent>
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Calls C++ function: QChildEvent* static_cast<QChildEvent*>(QEvent* ptr)
.
unsafe fn static_downcast_mut(ptr: MutPtr<QEvent>) -> MutPtr<QChildEvent>
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Calls C++ function: QChildEvent* static_cast<QChildEvent*>(QEvent* ptr)
.
impl StaticUpcast<QEvent> for QChildEvent
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unsafe fn static_upcast(ptr: Ptr<QChildEvent>) -> Ptr<QEvent>
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Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr)
.
unsafe fn static_upcast_mut(ptr: MutPtr<QChildEvent>) -> MutPtr<QEvent>
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Calls C++ function: QEvent* static_cast<QEvent*>(QChildEvent* ptr)
.
Auto Trait Implementations
impl RefUnwindSafe for QChildEvent
impl Send for QChildEvent
impl Sync for QChildEvent
impl Unpin for QChildEvent
impl UnwindSafe for QChildEvent
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> CastInto<U> for T where
U: CastFrom<T>,
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U: CastFrom<T>,
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> StaticUpcast<T> for T
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unsafe fn static_upcast(ptr: Ptr<T>) -> Ptr<T>
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unsafe fn static_upcast_mut(ptr: MutPtr<T>) -> MutPtr<T>
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,