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[править] QGraphicsSceneWheelEvent Class Reference
^{[модуль QtGui ]}

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

 #include <QGraphicsSceneWheelEvent>

Inherits QGraphicsSceneEvent.

Класс был добавлен в Qt 4.2.

• Список всех членов, включая унаследованные

[править] Открытые функции

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

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

[править] Дополнительные унаследованные члены

• 1 property inherited from QEvent

[править] Подробное описание

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

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

QWheelEvents 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, and QWheelEvent.

[править] Описание функций-членов

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QGraphicsSceneWheelEvent::~QGraphicsSceneWheelEvent ()

Destroys the QGraphicsSceneWheelEvent.

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Qt::MouseButtons QGraphicsSceneWheelEvent::buttons () const

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

See also modifiers().

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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).

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Qt::KeyboardModifiers QGraphicsSceneWheelEvent::modifiers () const

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

See also buttons().

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Qt::Orientation QGraphicsSceneWheelEvent::orientation () const

Returns the wheel orientation.

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QPointF QGraphicsSceneWheelEvent::pos () const

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

See also scenePos() and screenPos().

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QPointF QGraphicsSceneWheelEvent::scenePos () const

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

See also pos() and screenPos().

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QPoint QGraphicsSceneWheelEvent::screenPos () const

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

See also pos() and scenePos().