QGraphicsSceneWheelEvent Class

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

Header:	#include <QGraphicsSceneWheelEvent>
qmake:	QT += widgets
Since:	Qt 4.2
Inherits:	QGraphicsSceneEvent

This class was introduced in Qt 4.2.

• List of all members, including inherited members

Public Functions

virtual	~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

Detailed Description

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.

Member Function Documentation

[virtual] QGraphicsSceneWheelEvent::~QGraphicsSceneWheelEvent()

Destroys the QGraphicsSceneWheelEvent.

Qt::MouseButtons QGraphicsSceneWheelEvent::buttons() const

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

See also 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).

Qt::KeyboardModifiers QGraphicsSceneWheelEvent::modifiers() const

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

See also buttons().

Qt::Orientation QGraphicsSceneWheelEvent::orientation() const

Returns the wheel orientation.

QPointF QGraphicsSceneWheelEvent::pos() const

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

See also scenePos() and screenPos().

QPointF QGraphicsSceneWheelEvent::scenePos() const

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

See also pos() and screenPos().

QPoint QGraphicsSceneWheelEvent::screenPos() const

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

See also pos() and scenePos().