Contents

• Public Functions
• Detailed Description

Detailed Description

TheQGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.

TheQGraphicsSceneWheelEvent class provides wheel events in the graphics view framework.

QWheelEvents received by aQGraphicsView are translated into QGraphicsSceneWheelEvents; it translates theQWheelEvent::globalPos() into item, scene, and screen coordinates (pos(),scenePos(), andscreenPos()).

Member Function Documentation

QGraphicsSceneWheelEvent::~QGraphicsSceneWheelEvent()

Destroys theQGraphicsSceneWheelEvent.

Qt::MouseButtons QGraphicsSceneWheelEvent::buttons() const

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

See alsomodifiers().

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 alsobuttons().

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 alsoscenePos() andscreenPos().

QPointF QGraphicsSceneWheelEvent::scenePos() const

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

See alsopos() andscreenPos().

QPoint QGraphicsSceneWheelEvent::screenPos() const

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

See alsopos() andscenePos().