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QGraphicsSceneHelpEvent Class

The QGraphicsSceneHelpEvent class provides events when a tooltip is requested. More...

Header: #include <QGraphicsSceneHelpEvent>
qmake: QT += widgets
Since: Qt 4.2
Inherits: QGraphicsSceneEvent

This class was introduced in Qt 4.2.

Public Functions

virtual ~QGraphicsSceneHelpEvent()
QPointF scenePos() const
QPoint screenPos() const

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

[virtual] 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 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 scenePos().

© The Qt Company Ltd
Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5.13/qgraphicsscenehelpevent.html