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. |
Public Functions
| ~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
Additional Inherited Members
Detailed Description
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.
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 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.
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