The QGraphicsSceneEvent class provides a base class for all graphics view related events. More...

#include <qgraphicssceneevent.h>

Inheritance diagram for QGraphicsSceneEvent:

Collaboration diagram for QGraphicsSceneEvent:

Public Member Functions
	QGraphicsSceneEvent (Type type)

	~QGraphicsSceneEvent ()
	Destroys the event.

QWidget *	widget () const
	Returns the widget where the event originated, or \nullptr if the event originates from another application.

void	setWidget (QWidget *widget)

quint64	timestamp () const

void	setTimestamp (quint64 ts)

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 Member Functions
	QGraphicsSceneEvent (QGraphicsSceneEventPrivate &dd, Type type=None)

Protected Member Functions inherited from QEvent
	QEvent (Type type, InputEventTag)

	QEvent (Type type, PointerEventTag)

	QEvent (Type type, SinglePointEventTag)

Protected Attributes
QScopedPointer< QGraphicsSceneEventPrivate >	d_ptr

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

Detailed Description

The QGraphicsSceneEvent class provides a base class for all graphics view related events.

Since: 4.2

\inmodule QtWidgets

When a QGraphicsView receives Qt mouse, keyboard, and drag and drop events (QMouseEvent, QKeyEvent, QDragEvent, etc.), it translates them into instances of QGraphicsSceneEvent subclasses and forwards them to the QGraphicsScene it displays. The scene then forwards the events to the relevant items.

For example, when a QGraphicsView receives a QMouseEvent of type MousePress as a response to a user click, the view sends a QGraphicsSceneMouseEvent of type GraphicsSceneMousePress to the underlying QGraphicsScene through its \l{QGraphicsScene::}{mousePressEvent()} function. The default QGraphicsScene::mousePressEvent() implementation determines which item was clicked and forwards the event to QGraphicsItem::mousePressEvent().

\omit ### Beskrive widget() \endomit

Subclasses such as QGraphicsSceneMouseEvent and QGraphicsSceneContextMenuEvent provide the coordinates from the original QEvent in screen, scene, and item coordinates (see \l{QGraphicsSceneMouseEvent::}{screenPos()}, \l{QGraphicsSceneMouseEvent::}{scenePos()}, and \l{QGraphicsSceneMouseEvent::}{pos()}). The item coordinates are set by the QGraphicsScene before it forwards the event to the event to a QGraphicsItem. The mouse events also add the possibility to retrieve the coordinates from the last event received by the view (see \l{QGraphicsSceneMouseEvent::}{lastScreenPos()}, \l{QGraphicsSceneMouseEvent::}{lastScenePos()}, and \l{QGraphicsSceneMouseEvent::}{lastPos()}).