Qt 6.x
The Qt SDK
Loading...
Searching...
No Matches
Public Member Functions | Protected Attributes | List of all members
QChildEvent Class Reference

\inmodule QtCore More...

#include <qcoreevent.h>

+ Inheritance diagram for QChildEvent:
+ Collaboration diagram for QChildEvent:

Public Member Functions

 QChildEvent (Type type, QObject *child)
 Constructs a child event object of a particular type for the child.
 
QObject * child () const
 Returns the child object that was added or removed.
 
bool added () const
 Returns true if type() is QEvent::ChildAdded; otherwise returns false.
 
bool polished () const
 Returns true if type() is QEvent::ChildPolished; otherwise returns false.
 
bool removed () const
 Returns true if type() is QEvent::ChildRemoved; otherwise returns false.
 
- Public Member Functions inherited from QEvent
 QEvent (Type type)
 Constructs an event object of type type.
 
virtual ~QEvent ()
 Destroys the event.
 
Type type () const
 Returns the event type.
 
bool spontaneous () const
 Returns true if the event originated outside the application (a system event); otherwise returns false.
 
virtual void setAccepted (bool accepted)
 
bool isAccepted () const
 
void accept ()
 Sets the accept flag of the event object, the equivalent of calling setAccepted(true).
 
void ignore ()
 Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false).
 
bool isInputEvent () const noexcept
 
bool isPointerEvent () const noexcept
 
bool isSinglePointEvent () const noexcept
 
virtual QEvent * clone () const
 Creates and returns an identical copy of this event.
 

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 , WindowAboutToChangeInternal = 221 , DevicePixelRatioChange = 222 ,
  User = 1000 , MaxUser = 65535
}
 This enum type defines the valid event types in Qt. More...
 
- 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

\inmodule QtCore

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().

Definition at line 371 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 569 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 378 of file qcoreevent.h.

◆ child()

QObject * QChildEvent::child ( ) const
inline

Returns the child object that was added or removed.

Definition at line 377 of file qcoreevent.h.

Referenced by QStatusBar::event(), and QWindowContainer::eventFilter().

+ Here is the caller graph for this function:

◆ polished()

bool QChildEvent::polished ( ) const
inline

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

Definition at line 379 of file qcoreevent.h.

◆ removed()

bool QChildEvent::removed ( ) const
inline

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

Definition at line 380 of file qcoreevent.h.

Member Data Documentation

◆ c

QObject* QChildEvent::c
protected

Definition at line 383 of file qcoreevent.h.

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