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Internal/Contributor docs for the Qt SDK. Note: These are NOT official API docs; those are found at https://doc.qt.io/
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QGraphicsSceneWheelEvent Class Reference

The QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework. More...

#include <qgraphicssceneevent.h>

Inheritance diagram for QGraphicsSceneWheelEvent:
Collaboration diagram for QGraphicsSceneWheelEvent:

Public Member Functions

 QGraphicsSceneWheelEvent (Type type=None)
 ~QGraphicsSceneWheelEvent ()
 Destroys the QGraphicsSceneWheelEvent.
QPointF pos () const
 Returns the position of the cursor in item coordinates when the wheel event occurred.
void setPos (const QPointF &pos)
QPointF scenePos () const
 Returns the position of the cursor in scene coordinates when the wheel event occurred.
void setScenePos (const QPointF &pos)
QPoint screenPos () const
 Returns the position of the cursor in screen coordinates when the wheel event occurred.
void setScreenPos (const QPoint &pos)
Qt::MouseButtons buttons () const
 Returns the mouse buttons that were pressed when the wheel event occurred.
void setButtons (Qt::MouseButtons buttons)
Qt::KeyboardModifiers modifiers () const
 Returns the keyboard modifiers that were active when the wheel event occurred.
void setModifiers (Qt::KeyboardModifiers modifiers)
int delta () const
 Returns the distance that the wheel is rotated, in eighths (1/8s) of a degree.
void setDelta (int delta)
Qt::Orientation orientation () const
 Returns the wheel orientation.
void setOrientation (Qt::Orientation orientation)
Qt::ScrollPhase phase () const
void setPhase (Qt::ScrollPhase scrollPhase)
QPoint pixelDelta () const
void setPixelDelta (QPoint delta)
bool isInverted () const
 Returns whether the delta values delivered with the event are inverted.
void setInverted (bool inverted)
Public Member Functions inherited from QGraphicsSceneEvent
 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.

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 ,
  ChildWindowAdded = 223 , ChildWindowRemoved = 224 , ParentWindowAboutToChange = 225 , ParentWindowChange = 226 ,
  SafeAreaMarginsChange = 227 , 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 QGraphicsSceneEvent
 QGraphicsSceneEvent (QGraphicsSceneEventPrivate &dd, Type type=None)
Protected Member Functions inherited from QEvent
 QT_DEFINE_TAG_STRUCT (InputEventTag)
 QEvent (Type type, InputEventTag)
 QT_DEFINE_TAG_STRUCT (PointerEventTag)
 QEvent (Type type, PointerEventTag)
 QT_DEFINE_TAG_STRUCT (SinglePointEventTag)
 QEvent (Type type, SinglePointEventTag)
Protected Attributes inherited from QGraphicsSceneEvent
QScopedPointer< QGraphicsSceneEventPrivate > d_ptr
Protected Attributes inherited from QEvent
quint16 t

Detailed Description

The QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.

The QGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.

Since
4.2

\inmodule QtWidgets

\l{QWheelEvent}{QWheelEvent}s received by a QGraphicsView are translated into QGraphicsSceneWheelEvents; it translates the QWheelEvent::globalPos() into item, scene, and screen coordinates (pos(), scenePos(), and screenPos()).

See also
QGraphicsSceneMouseEvent, QGraphicsSceneContextMenuEvent, QGraphicsSceneHoverEvent, QWheelEvent

Definition at line 101 of file qgraphicssceneevent.h.

Constructor & Destructor Documentation

◆ QGraphicsSceneWheelEvent()

QGraphicsSceneWheelEvent::QGraphicsSceneWheelEvent ( Type type = None)
explicit

Constructs a QGraphicsSceneWheelEvent of type type, which is always QEvent::GraphicsSceneWheel.

Definition at line 699 of file qgraphicssceneevent.cpp.

◆ ~QGraphicsSceneWheelEvent()

QGraphicsSceneWheelEvent::~QGraphicsSceneWheelEvent ( )

Destroys the QGraphicsSceneWheelEvent.

Definition at line 707 of file qgraphicssceneevent.cpp.

Member Function Documentation

◆ buttons()

Qt::MouseButtons QGraphicsSceneWheelEvent::buttons ( ) const

Returns the mouse buttons that were pressed when the wheel event occurred.

See also
modifiers()

Definition at line 779 of file qgraphicssceneevent.cpp.

◆ delta()

int QGraphicsSceneWheelEvent::delta ( ) const

Returns the distance that the wheel is rotated, in eighths (1/8s) of a degree.

A positive value indicates that the wheel was rotated forwards away from the user; a negative value indicates that the wheel was rotated backwards toward the user.

Most mouse types work in steps of 15 degrees, in which case the delta value is a multiple of 120 (== 15 * 8).

Definition at line 824 of file qgraphicssceneevent.cpp.

◆ isInverted()

bool QGraphicsSceneWheelEvent::isInverted ( ) const

Returns whether the delta values delivered with the event are inverted.

Since
6.2

Definition at line 909 of file qgraphicssceneevent.cpp.

◆ modifiers()

Qt::KeyboardModifiers QGraphicsSceneWheelEvent::modifiers ( ) const

Returns the keyboard modifiers that were active when the wheel event occurred.

See also
buttons()

Definition at line 800 of file qgraphicssceneevent.cpp.

◆ orientation()

Qt::Orientation QGraphicsSceneWheelEvent::orientation ( ) const

Returns the wheel orientation.

Definition at line 842 of file qgraphicssceneevent.cpp.

◆ phase()

Qt::ScrollPhase QGraphicsSceneWheelEvent::phase ( ) const
Since
6.2

Returns the scrolling phase of this wheel event.

See also
QWheelEvent::phase

Definition at line 864 of file qgraphicssceneevent.cpp.

◆ pixelDelta()

QPoint QGraphicsSceneWheelEvent::pixelDelta ( ) const
Since
6.2

Returns the scrolling distance in pixels on screen. This value is provided on platforms that support high-resolution pixel-based delta values, such as \macos. The value should be used directly to scroll content on screen.

See also
QWheelEvent::pixelDelta

Definition at line 889 of file qgraphicssceneevent.cpp.

◆ pos()

QPointF QGraphicsSceneWheelEvent::pos ( ) const

Returns the position of the cursor in item coordinates when the wheel event occurred.

See also
scenePos(), screenPos()

Definition at line 717 of file qgraphicssceneevent.cpp.

◆ scenePos()

QPointF QGraphicsSceneWheelEvent::scenePos ( ) const

Returns the position of the cursor in scene coordinates when the wheel event occurred.

See also
pos(), screenPos()

Definition at line 738 of file qgraphicssceneevent.cpp.

◆ screenPos()

QPoint QGraphicsSceneWheelEvent::screenPos ( ) const

Returns the position of the cursor in screen coordinates when the wheel event occurred.

See also
pos(), scenePos()

Definition at line 759 of file qgraphicssceneevent.cpp.

◆ setButtons()

void QGraphicsSceneWheelEvent::setButtons ( Qt::MouseButtons buttons)

Definition at line 788 of file qgraphicssceneevent.cpp.

◆ setDelta()

void QGraphicsSceneWheelEvent::setDelta ( int delta)

Definition at line 833 of file qgraphicssceneevent.cpp.

◆ setInverted()

void QGraphicsSceneWheelEvent::setInverted ( bool inverted)

Definition at line 918 of file qgraphicssceneevent.cpp.

◆ setModifiers()

void QGraphicsSceneWheelEvent::setModifiers ( Qt::KeyboardModifiers modifiers)

Definition at line 809 of file qgraphicssceneevent.cpp.

◆ setOrientation()

void QGraphicsSceneWheelEvent::setOrientation ( Qt::Orientation orientation)

Definition at line 851 of file qgraphicssceneevent.cpp.

◆ setPhase()

void QGraphicsSceneWheelEvent::setPhase ( Qt::ScrollPhase scrollPhase)

Definition at line 873 of file qgraphicssceneevent.cpp.

◆ setPixelDelta()

void QGraphicsSceneWheelEvent::setPixelDelta ( QPoint pixelDelta)

Definition at line 898 of file qgraphicssceneevent.cpp.

◆ setPos()

void QGraphicsSceneWheelEvent::setPos ( const QPointF & pos)

Definition at line 726 of file qgraphicssceneevent.cpp.

◆ setScenePos()

void QGraphicsSceneWheelEvent::setScenePos ( const QPointF & pos)

Definition at line 747 of file qgraphicssceneevent.cpp.

◆ setScreenPos()

void QGraphicsSceneWheelEvent::setScreenPos ( const QPoint & pos)

Definition at line 768 of file qgraphicssceneevent.cpp.

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