QGraphicsSceneEvent Class Reference

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 ()
QWidget *	widget () const
void	setWidget (QWidget *widget)
quint64	timestamp () const
void	setTimestamp (quint64 ts)
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
virtual QEvent *	clone () const

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 , User = 1000 , MaxUser = 65535 }
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()}).

See also

QEvent

Definition at line 61 of file qgraphicssceneevent.h.

Constructor & Destructor Documentation

QGraphicsSceneEvent() [1/2]

QGraphicsSceneEvent::QGraphicsSceneEvent ( Type  type )

explicit

Definition at line 298 of file qgraphicssceneevent.cpp.

~QGraphicsSceneEvent()

QGraphicsSceneEvent::~QGraphicsSceneEvent

(

)

Destroys the event.

Definition at line 318 of file qgraphicssceneevent.cpp.

QGraphicsSceneEvent() [2/2]

QGraphicsSceneEvent::QGraphicsSceneEvent ( QGraphicsSceneEventPrivate &  dd, Type  type = None  )

protected

Definition at line 309 of file qgraphicssceneevent.cpp.

Member Function Documentation

setTimestamp()

void QGraphicsSceneEvent::setTimestamp

(

quint64

ts

)

Definition at line 358 of file qgraphicssceneevent.cpp.

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setWidget()

void QGraphicsSceneEvent::setWidget

(

QWidget *

widget

)

Definition at line 338 of file qgraphicssceneevent.cpp.

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timestamp()

quint64 QGraphicsSceneEvent::timestamp

(

)

const

Since

6.2

Returns the timestamp of the original event, or 0 if the original event does not report a time stamp.

Definition at line 349 of file qgraphicssceneevent.cpp.

widget()

QWidget * QGraphicsSceneEvent::widget

(

)

const

Returns the widget where the event originated, or \nullptr if the event originates from another application.

Definition at line 326 of file qgraphicssceneevent.cpp.

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Member Data Documentation

d_ptr

QScopedPointer<QGraphicsSceneEventPrivate> QGraphicsSceneEvent::d_ptr

protected

Definition at line 75 of file qgraphicssceneevent.h.

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

• src/widgets/graphicsview/qgraphicssceneevent.h
• src/widgets/graphicsview/qgraphicssceneevent.cpp