Struct qt_gui::QCloseEvent

#[repr(C)]pub struct QCloseEvent { /* fields omitted */ }

The QCloseEvent class contains parameters that describe a close event.

C++ class: QCloseEvent.

C++ documentation:

The QCloseEvent class contains parameters that describe a close event.

Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. They are also sent when you call QWidget::close() to close a widget programmatically.

Close events contain a flag that indicates whether the receiver wants the widget to be closed or not. When a widget accepts the close event, it is hidden (and destroyed if it was created with the Qt::WA_DeleteOnClose flag). If it refuses to accept the close event nothing happens. (Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this.)

The event handler QWidget::closeEvent() receives close events. The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handling, you should reimplement the event handler and ignore() the event.

The closeEvent() in the Application example shows a close event handler that asks whether to save a document before closing.

If you want the widget to be deleted when it is closed, create it with the Qt::WA_DeleteOnClose flag. This is very useful for independent top-level windows in a multi-window application.

QObjects emits the destroyed() signal when they are deleted.

If the last top-level window is closed, the QGuiApplication::lastWindowClosed() signal is emitted.

The isAccepted() function returns true if the event's receiver has agreed to close the widget; call accept() to agree to close the widget and call ignore() if the receiver of this event does not want the widget to be closed.

Methods

impl QCloseEvent

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

The QCloseEvent class contains parameters that describe a close event.

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

C++ documentation:

The QCloseEvent class contains parameters that describe a close event.

Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. They are also sent when you call QWidget::close() to close a widget programmatically.

Close events contain a flag that indicates whether the receiver wants the widget to be closed or not. When a widget accepts the close event, it is hidden (and destroyed if it was created with the Qt::WA_DeleteOnClose flag). If it refuses to accept the close event nothing happens. (Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this.)

The event handler QWidget::closeEvent() receives close events. The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handling, you should reimplement the event handler and ignore() the event.

The closeEvent() in the Application example shows a close event handler that asks whether to save a document before closing.

If you want the widget to be deleted when it is closed, create it with the Qt::WA_DeleteOnClose flag. This is very useful for independent top-level windows in a multi-window application.

QObjects emits the destroyed() signal when they are deleted.

If the last top-level window is closed, the QGuiApplication::lastWindowClosed() signal is emitted.

The isAccepted() function returns true if the event's receiver has agreed to close the widget; call accept() to agree to close the widget and call ignore() if the receiver of this event does not want the widget to be closed.

pub unsafe fn new() -> CppBox<QCloseEvent>

Constructs a close event object.

Calls C++ function: [constructor] void QCloseEvent::QCloseEvent().

C++ documentation:

Constructs a close event object.

See also accept().

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

The QCloseEvent class contains parameters that describe a close event.

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

C++ documentation:

The QCloseEvent class contains parameters that describe a close event.

Close events are sent to widgets that the user wants to close, usually by choosing "Close" from the window menu, or by clicking the X title bar button. They are also sent when you call QWidget::close() to close a widget programmatically.

Close events contain a flag that indicates whether the receiver wants the widget to be closed or not. When a widget accepts the close event, it is hidden (and destroyed if it was created with the Qt::WA_DeleteOnClose flag). If it refuses to accept the close event nothing happens. (Under X11 it is possible that the window manager will forcibly close the window; but at the time of writing we are not aware of any window manager that does this.)

The event handler QWidget::closeEvent() receives close events. The default implementation of this event handler accepts the close event. If you do not want your widget to be hidden, or want some special handling, you should reimplement the event handler and ignore() the event.

The closeEvent() in the Application example shows a close event handler that asks whether to save a document before closing.

If you want the widget to be deleted when it is closed, create it with the Qt::WA_DeleteOnClose flag. This is very useful for independent top-level windows in a multi-window application.

QObjects emits the destroyed() signal when they are deleted.

If the last top-level window is closed, the QGuiApplication::lastWindowClosed() signal is emitted.

The isAccepted() function returns true if the event's receiver has agreed to close the widget; call accept() to agree to close the widget and call ignore() if the receiver of this event does not want the widget to be closed.

Trait Implementations

impl CppDeletable for QCloseEvent

unsafe fn delete(&self)

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

impl Deref for QCloseEvent

type Target = QEvent

The resulting type after dereferencing.

fn deref(&self) -> &QEvent

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

impl DynamicCast<QCloseEvent> for QEvent

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

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

impl StaticDowncast<QCloseEvent> for QEvent

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

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

impl StaticUpcast<QEvent> for QCloseEvent

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

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