QChildEvent Class
The QChildEvent class contains event parameters for child object events. 更多...
| 头文件: | #include <QChildEvent> |
| qmake: | QT += core |
| 基类: | QEvent |
公有函数
| QChildEvent(Type type, QObject *child) | |
| bool | added() const |
| QObject * | child() const |
| bool | polished() const |
| bool | removed() const |
- 6 个公有函数继承自 QEvent
其他继承的成员
详细描述
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().
成员函数
QChildEvent::QChildEvent(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.
参见 child().
bool QChildEvent::added() const
Returns true if type() is QEvent::ChildAdded; otherwise returns false.
QObject *QChildEvent::child() const
Returns the child object that was added or removed.
bool QChildEvent::polished() const
Returns true if type() is QEvent::ChildPolished; otherwise returns false.
bool QChildEvent::removed() const
Returns true if type() is QEvent::ChildRemoved; otherwise returns false.