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.
© 2020 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.