QChildEvent Class Reference

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

#include <qcoreevent.h>

Inheritance diagram for QChildEvent:

Collaboration diagram for QChildEvent:

Public Member Functions
	QChildEvent (Type type, QObject *child)
	~QChildEvent ()
QObject *	child () const
bool	added () const
bool	polished () const
bool	removed () const
QChildEvent *	clone () const override
Public Member Functions inherited from QEvent
	QEvent (Type type)
virtual	~QEvent ()
Type	type () const
bool	spontaneous () const
virtual void	setAccepted (bool accepted)
bool	isAccepted () const
void	accept ()
void	ignore ()
bool	isInputEvent () const noexcept
bool	isPointerEvent () const noexcept
bool	isSinglePointEvent () const noexcept

Protected Attributes
QObject *	c
Protected Attributes inherited from QEvent
quint16	t

Additional Inherited Members
Public Types inherited from QEvent
enum	Type {   None = 0 , Timer = 1 , MouseButtonPress = 2 , MouseButtonRelease = 3 ,   MouseButtonDblClick = 4 , MouseMove = 5 , KeyPress = 6 , KeyRelease = 7 ,   FocusIn = 8 , FocusOut = 9 , FocusAboutToChange = 23 , Enter = 10 ,   Leave = 11 , Paint = 12 , Move = 13 , Resize = 14 ,   Create = 15 , Destroy = 16 , Show = 17 , Hide = 18 ,   Close = 19 , Quit = 20 , ParentChange = 21 , ParentAboutToChange = 131 ,   ThreadChange = 22 , WindowActivate = 24 , WindowDeactivate = 25 , ShowToParent = 26 ,   HideToParent = 27 , Wheel = 31 , WindowTitleChange = 33 , WindowIconChange = 34 ,   ApplicationWindowIconChange = 35 , ApplicationFontChange = 36 , ApplicationLayoutDirectionChange = 37 , ApplicationPaletteChange = 38 ,   PaletteChange = 39 , Clipboard = 40 , Speech = 42 , MetaCall = 43 ,   SockAct = 50 , WinEventAct = 132 , DeferredDelete = 52 , DragEnter = 60 ,   DragMove = 61 , DragLeave = 62 , Drop = 63 , DragResponse = 64 ,   ChildAdded = 68 , ChildPolished = 69 , ChildRemoved = 71 , ShowWindowRequest = 73 ,   PolishRequest = 74 , Polish = 75 , LayoutRequest = 76 , UpdateRequest = 77 ,   UpdateLater = 78 , EmbeddingControl = 79 , ActivateControl = 80 , DeactivateControl = 81 ,   ContextMenu = 82 , InputMethod = 83 , TabletMove = 87 , LocaleChange = 88 ,   LanguageChange = 89 , LayoutDirectionChange = 90 , Style = 91 , TabletPress = 92 ,   TabletRelease = 93 , OkRequest = 94 , HelpRequest = 95 , IconDrag = 96 ,   FontChange = 97 , EnabledChange = 98 , ActivationChange = 99 , StyleChange = 100 ,   IconTextChange = 101 , ModifiedChange = 102 , MouseTrackingChange = 109 , WindowBlocked = 103 ,   WindowUnblocked = 104 , WindowStateChange = 105 , ReadOnlyChange = 106 , ToolTip = 110 ,   WhatsThis = 111 , StatusTip = 112 , ActionChanged = 113 , ActionAdded = 114 ,   ActionRemoved = 115 , FileOpen = 116 , Shortcut = 117 , ShortcutOverride = 51 ,   WhatsThisClicked = 118 , ToolBarChange = 120 , ApplicationActivate = 121 , ApplicationActivated = ApplicationActivate ,   ApplicationDeactivate = 122 , ApplicationDeactivated = ApplicationDeactivate , QueryWhatsThis = 123 , EnterWhatsThisMode = 124 ,   LeaveWhatsThisMode = 125 , ZOrderChange = 126 , HoverEnter = 127 , HoverLeave = 128 ,   HoverMove = 129 , AcceptDropsChange = 152 , ZeroTimerEvent = 154 , GraphicsSceneMouseMove = 155 ,   GraphicsSceneMousePress = 156 , GraphicsSceneMouseRelease = 157 , GraphicsSceneMouseDoubleClick = 158 , GraphicsSceneContextMenu = 159 ,   GraphicsSceneHoverEnter = 160 , GraphicsSceneHoverMove = 161 , GraphicsSceneHoverLeave = 162 , GraphicsSceneHelp = 163 ,   GraphicsSceneDragEnter = 164 , GraphicsSceneDragMove = 165 , GraphicsSceneDragLeave = 166 , GraphicsSceneDrop = 167 ,   GraphicsSceneWheel = 168 , GraphicsSceneLeave = 220 , KeyboardLayoutChange = 169 , DynamicPropertyChange = 170 ,   TabletEnterProximity = 171 , TabletLeaveProximity = 172 , NonClientAreaMouseMove = 173 , NonClientAreaMouseButtonPress = 174 ,   NonClientAreaMouseButtonRelease = 175 , NonClientAreaMouseButtonDblClick = 176 , MacSizeChange = 177 , ContentsRectChange = 178 ,   MacGLWindowChange = 179 , FutureCallOut = 180 , GraphicsSceneResize = 181 , GraphicsSceneMove = 182 ,   CursorChange = 183 , ToolTipChange = 184 , NetworkReplyUpdated = 185 , GrabMouse = 186 ,   UngrabMouse = 187 , GrabKeyboard = 188 , UngrabKeyboard = 189 , StateMachineSignal = 192 ,   StateMachineWrapped = 193 , TouchBegin = 194 , TouchUpdate = 195 , TouchEnd = 196 ,   NativeGesture = 197 , RequestSoftwareInputPanel = 199 , CloseSoftwareInputPanel = 200 , WinIdChange = 203 ,   Gesture = 198 , GestureOverride = 202 , ScrollPrepare = 204 , Scroll = 205 ,   Expose = 206 , InputMethodQuery = 207 , OrientationChange = 208 , TouchCancel = 209 ,   ThemeChange = 210 , SockClose = 211 , PlatformPanel = 212 , StyleAnimationUpdate = 213 ,   ApplicationStateChange = 214 , WindowChangeInternal = 215 , ScreenChangeInternal = 216 , PlatformSurface = 217 ,   Pointer = 218 , TabletTrackingChange = 219 , User = 1000 , MaxUser = 65535 }
Static Public Member Functions inherited from QEvent
static int	registerEventType (int hint=-1) noexcept
Protected Member Functions inherited from QEvent
	QEvent (Type type, InputEventTag)
	QEvent (Type type, PointerEventTag)
	QEvent (Type type, SinglePointEventTag)

Detailed Description

The QChildEvent class contains event parameters for child object events.

\inmodule QtCore

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().

Definition at line 382 of file qcoreevent.h.

Constructor & Destructor Documentation

QChildEvent()

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.

See also

child()

Definition at line 604 of file qcoreevent.cpp.

~QChildEvent()

QChildEvent::~QChildEvent

(

)

Definition at line 611 of file qcoreevent.cpp.

Member Function Documentation

added()

bool QChildEvent::added ( ) const

inline

Returns true if type() is QEvent::ChildAdded; otherwise returns false.

Definition at line 389 of file qcoreevent.h.

child()

QObject * QChildEvent::child ( ) const

inline

Returns the child object that was added or removed.

Definition at line 388 of file qcoreevent.h.

Here is the caller graph for this function:

clone()

QChildEvent* QChildEvent::clone ( ) const

inlineoverridevirtual

Creates and returns an identical copy of this event.

Since

6.0

Reimplemented from QEvent.

Definition at line 393 of file qcoreevent.h.

polished()

bool QChildEvent::polished ( ) const

inline

Returns true if type() is QEvent::ChildPolished; otherwise returns false.

Definition at line 390 of file qcoreevent.h.

removed()

bool QChildEvent::removed ( ) const

inline

Returns true if type() is QEvent::ChildRemoved; otherwise returns false.

Definition at line 391 of file qcoreevent.h.

Member Data Documentation

c

QObject* QChildEvent::c

protected

Definition at line 396 of file qcoreevent.h.

---

The documentation for this class was generated from the following files:

• src/corelib/kernel/qcoreevent.h
• src/corelib/kernel/qcoreevent.cpp