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.
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.
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