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QGraphicsSceneWheelEvent Class Reference
^{[QtGui module]}

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

 #include <QGraphicsSceneWheelEvent>

Inherits QGraphicsSceneEvent.

This class was introduced in Qt 4.2.

• List of all members, including inherited members

Public Functions

• ~QGraphicsSceneWheelEvent ()
• Qt::MouseButtons buttons () const
• int delta () const
• Qt::KeyboardModifiers modifiers () const
• QPointF pos () const
• QPointF scenePos () const
• QPoint screenPos () const

• 1 public function inherited from QGraphicsSceneEvent
• 6 public functions inherited from QEvent

Additional Inherited Members

• 1 property inherited from QEvent

Detailed Description

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

QWheelEvents received by a QGraphicsView are translated into QGraphicsSceneWheelEvents. The QWheelEvent::globalPos() is translated into item, scene, and screen coordinates (pos(), scenePos(), and screenPos()).

See also QGraphicsSceneMouseEvent, QGraphicsSceneContextMenuEvent, QGraphicsSceneHoverEvent, and QWheelEvent.

Member Function Documentation

QGraphicsSceneWheelEvent::~QGraphicsSceneWheelEvent ()

Destroys the QGraphicsSceneWheelEvent.

Qt::MouseButtons QGraphicsSceneWheelEvent::buttons () const

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

See also setButtons() and modifiers().

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).

See also setDelta().

Qt::KeyboardModifiers QGraphicsSceneWheelEvent::modifiers () const

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

See also setModifiers() and buttons().

QPointF QGraphicsSceneWheelEvent::pos () const

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

See also setPos(), scenePos(), and screenPos().

QPointF QGraphicsSceneWheelEvent::scenePos () const

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

See also setScenePos(), pos(), and screenPos().

QPoint QGraphicsSceneWheelEvent::screenPos () const

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

See also setScreenPos(), pos(), and scenePos().