Qt 4.7: QChildEvent Class Reference

Qt Reference Documentation

# QChildEvent Class Reference

The QChildEvent class contains event parameters for child object events. More...

     #include <QChildEvent>

Inherits: QEvent.

- List of all members, including inherited members
- Qt 3 support members

## Public Functions

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

- 6 public functions inherited from QEvent

### Additional Inherited Members

- 1 property inherited from QEvent
- 1 static public member inherited from QEvent

## Detailed Description

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().

## Member Function Documentation

### 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, QEvent::ChildPolished, or QEvent::ChildRemoved.

See also 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.