QGraphicsSceneHelpEvent Class
The QGraphicsSceneHelpEvent class provides events when a tooltip is requested. \since
4.2 \ingroup
graphicsview-api \inmodule
QtWidgets. More...
Header: | #include <QGraphicsSceneHelpEvent> |
Inherits: | QGraphicsSceneEvent |
Public Functions
QGraphicsSceneHelpEvent(Type type = None) | |
virtual | ~QGraphicsSceneHelpEvent() |
QPointF | scenePos() const |
QPoint | screenPos() const |
void | setScenePos(const QPointF &point) |
void | setScreenPos(const QPoint &point) |
Detailed Description
When a QGraphicsView receives a QEvent of type QEvent::ToolTip, it creates a QGraphicsSceneHelpEvent, which is forwarded to the scene. You can set a tooltip on a QGraphicsItem with setToolTip(); by default QGraphicsScene displays the tooltip of the QGraphicsItem with the highest z-value (i.e, the top-most item) under the mouse position.
QGraphicsView does not forward events when "What's This" and status tip help is requested. If you need this, you can reimplement QGraphicsView::viewportEvent() and forward QStatusTipEvent events and QEvents of type QEvent::WhatsThis to the scene.
See also QEvent.
Member Function Documentation
[explicit]
QGraphicsSceneHelpEvent::QGraphicsSceneHelpEvent(Type type = None)
\internal
Constructs a graphics scene help event of the specified type.
[virtual noexcept]
QGraphicsSceneHelpEvent::~QGraphicsSceneHelpEvent()
Destroys the event.
QPointF QGraphicsSceneHelpEvent::scenePos() const
Returns the position of the mouse cursor in scene coordinates at the moment the help event was sent.
See also setScenePos() and screenPos().
QPoint QGraphicsSceneHelpEvent::screenPos() const
Returns the position of the mouse cursor in screen coordinates at the moment the help event was sent.
See also setScreenPos() and scenePos().
void QGraphicsSceneHelpEvent::setScenePos(const QPointF &point)
\internal
Sets the position associated with the context menu to the given point in scene coordinates.
See also scenePos().
void QGraphicsSceneHelpEvent::setScreenPos(const QPoint &point)
\internal
Sets the position associated with the context menu to the given point in screen coordinates.
See also screenPos().