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

#include <qgraphicssceneevent.h>

Inheritance diagram for QGraphicsSceneEvent:

Public Functions
	QGraphicsSceneEvent (Type type)
	Constructs a generic graphics scene event of the specified type. More...

void	setWidget (QWidget *widget)
	Sets the widget related to this event. More...

QWidget *	widget () const
	Returns the widget where the event originated, or 0 if the event originates from another application. More...

	~QGraphicsSceneEvent ()
	Destroys the event. More...

Public Functions inherited from QEvent
void	accept ()
	Sets the accept flag of the event object, the equivalent of calling setAccepted(true). More...

void	ignore ()
	Clears the accept flag parameter of the event object, the equivalent of calling setAccepted(false). More...

bool	isAccepted () const

	QEvent (Type type)
	Contructs an event object of type type. More...

void	setAccepted (bool accepted)

bool	spontaneous () const
	Returns true if the event originated outside the application (a system event); otherwise returns false. More...

Type	type () const
	Returns the event type. More...

virtual	~QEvent ()
	Destroys the event. More...

Protected Functions
	QGraphicsSceneEvent (QGraphicsSceneEventPrivate &dd, Type type=None)
	Constructs a generic graphics scene event. More...

Protected Variables
QScopedPointer< QGraphicsSceneEventPrivate >	d_ptr

Protected Variables inherited from QEvent
QEventPrivate *	d

ushort	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, 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, AccessibilityPrepare = 86, 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, 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, AccessibilityHelp = 119, AccessibilityDescription = 130, AcceptDropsChange = 152, MenubarUpdated = 153, 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, 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, MacGLClearDrawable = 191, StateMachineSignal = 192, StateMachineWrapped = 193, TouchBegin = 194, TouchUpdate = 195, TouchEnd = 196, NativeGesture = 197, RequestSoftwareInputPanel = 199, CloseSoftwareInputPanel = 200, UpdateSoftKeys = 201, WinIdChange = 203, Gesture = 198, GestureOverride = 202, PlatformPanel = 212, User = 1000, MaxUser = 65535 }
	This enum type defines the valid event types in Qt. More...

Static Public Functions inherited from QEvent
static int	registerEventType (int hint=-1)
	Registers and returns a custom event type. More...

Detailed Description

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

Since: 4.2

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 QGraphicsScene::mousePressEvent() function. The default QGraphicsScene::mousePressEvent() implementation determines which item was clicked and forwards the event to QGraphicsItem::mousePressEvent().

Warning: This function is not part of the public interface. ### Beskrive widget()

Subclasses such as QGraphicsSceneMouseEvent and QGraphicsSceneContextMenuEvent provide the coordinates from the original QEvent in screen, scene, and item coordinates (see QGraphicsSceneMouseEvent::screenPos(), QGraphicsSceneMouseEvent::scenePos(), and 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 QGraphicsSceneMouseEvent::lastScreenPos(), QGraphicsSceneMouseEvent::lastScenePos(), and QGraphicsSceneMouseEvent::lastPos()).

See also: QEvent

Definition at line 67 of file qgraphicssceneevent.h.

Constructors and Destructors

◆ QGraphicsSceneEvent() [1/2]

QGraphicsSceneEvent::QGraphicsSceneEvent ( Type type )

Constructs a generic graphics scene event of the specified type.

Warning: This function is not part of the public interface.

Definition at line 324 of file qgraphicssceneevent.cpp.

     : QEvent(type), d_ptr(new QGraphicsSceneEventPrivate)
 {
     d_ptr->q_ptr = this;
 }

◆ ~QGraphicsSceneEvent()

QGraphicsSceneEvent::~QGraphicsSceneEvent ( )

Destroys the event.

Definition at line 347 of file qgraphicssceneevent.cpp.

348 {

349 }

◆ QGraphicsSceneEvent() [2/2]

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

protected

Constructs a generic graphics scene event.

Warning: This function is not part of the public interface.

Definition at line 338 of file qgraphicssceneevent.cpp.

     : QEvent(type), d_ptr(&dd)
 {
     d_ptr->q_ptr = this;
 }

Functions

◆ setWidget()

void QGraphicsSceneEvent::setWidget ( QWidget * widget )

Sets the widget related to this event.

Warning: This function is not part of the public interface.

See also: widget()

Definition at line 370 of file qgraphicssceneevent.cpp.

Referenced by _q_hoverFromMouseEvent(), QGraphicsScenePrivate::cloneDragDropEvent(), cloneEvent(), QGraphicsView::contextMenuEvent(), QGraphicsView::dragLeaveEvent(), QGraphicsScenePrivate::leaveScene(), QGraphicsView::mouseDoubleClickEvent(), QGraphicsViewPrivate::mouseMoveEventHandler(), QGraphicsView::mousePressEvent(), QGraphicsView::mouseReleaseEvent(), QGraphicsViewPrivate::populateSceneDragDropEvent(), QGraphicsViewPrivate::storeDragDropEvent(), QGraphicsView::viewportEvent(), and QGraphicsView::wheelEvent().

 {
     d_ptr->widget = widget;
 }

◆ widget()

QWidget * QGraphicsSceneEvent::widget ( ) const

Returns the widget where the event originated, or 0 if the event originates from another application.

Definition at line 355 of file qgraphicssceneevent.cpp.

Referenced by _q_hoverFromMouseEvent(), QGraphicsScenePrivate::cloneDragDropEvent(), cloneEvent(), QGraphicsScene::contextMenuEvent(), QGraphicsScenePrivate::dispatchHoverEvent(), QGraphicsScene::helpEvent(), QGraphicsItem::mouseMoveEvent(), QGraphicsViewPrivate::mouseMoveEventHandler(), QGraphicsScenePrivate::mousePressEventHandler(), QTextControl::processEvent(), QGraphicsScenePrivate::sendDragDropEvent(), QGraphicsScenePrivate::sendHoverEvent(), QGraphicsScenePrivate::sendMouseEvent(), setWidget(), QGraphicsViewPrivate::storeDragDropEvent(), QGraphicsScene::wheelEvent(), and QGraphicsWidgetPrivate::windowFrameMouseReleaseEvent().

 {
     return d_ptr->widget;
 }

Properties

◆ d_ptr

QScopedPointer<QGraphicsSceneEventPrivate> QGraphicsSceneEvent::d_ptr

protected

Definition at line 78 of file qgraphicssceneevent.h.

Referenced by QGraphicsSceneEvent(), setWidget(), and widget().

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

/src/gui/graphicsview/qgraphicssceneevent.h
/src/gui/graphicsview/qgraphicssceneevent.cpp

Public Functions

Protected Functions

Protected Variables

Additional Inherited Members