QChildEvent Class

QChildEvent 类包含子对象事件的事件参数。更多内容...

头文件：	`#include <QChildEvent>`

CMake：	`find_package(Qt6 REQUIRED COMPONENTS Core)` `target_link_libraries(mytarget PRIVATE Qt6::Core)`
qmake：	`QT += core`
继承自：	QEvent

所有成员列表，包括继承的成员
QChildEvent 属于事件类。

公共函数

	QChildEvent(QEvent::Type type, QObject *child)
bool	added() const
QObject *	child() const
bool	polished() const
bool	removed() const

受保护函数

	QChildEvent(QChildEvent &&)
QChildEvent &	operator=(QChildEvent &&)
QChildEvent &	operator=(const QChildEvent &other)

详细说明

当子对象被添加或删除时，子事件会立即发送给对象。

在这两种情况下，您只能确保子对象是QObject （或者，如果QObject::isWidgetType()返回true ，则为QWidget ）。这是因为在QEvent::ChildAdded 的情况下，子对象尚未完全构建；而在QEvent::ChildRemoved 的情况下，它可能已经被销毁了。

这些事件的处理程序是QObject::childEvent()。

成员函数文档

QChildEvent::QChildEvent(QEvent::Type type, QObject **child*)

为child 构建一个特定type 的子事件对象。

type 参数可以是QEvent::ChildAdded 、QEvent::ChildRemoved 或QEvent::ChildPolished 。

另请参阅 child()。

`[protected delete]` QChildEvent::QChildEvent(QChildEvent &&)

通过移动构造一个QChildEvent 的实例。该函数已被删除。

bool QChildEvent::added() const

如果type()的值为QEvent::ChildAdded ，则返回true ；否则返回false。

QObject *QChildEvent::child() const

返回已添加或已删除的子对象。

bool QChildEvent::polished() const

如果 `type()` 的结果为 `QEvent::ChildPolished`，则返回 `true `；否则返回 `false`。

bool QChildEvent::removed() const

如果type()的结果是QEvent::ChildRemoved ，则返回true ；否则返回false。

`[protected delete]` QChildEvent &QChildEvent::operator=(QChildEvent &&)

将other 按移动赋值方式赋值给此QChildEvent 实例。该函数已被删除。

`[noexcept protected default]` QChildEvent &QChildEvent::operator=(const QChildEvent &other)

将other 复制并赋值给此QChildEvent 实例。

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