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[править] QGraphicsSceneHelpEvent Class Reference
^{[модуль QtGui ]}

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

 #include <QGraphicsSceneHelpEvent>

Inherits QGraphicsSceneEvent.

Класс был добавлен в Qt 4.2.

• Список всех членов, включая унаследованные

[править] Открытые функции

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

• 1 public function inherited from QGraphicsSceneEvent
• 6 public functions inherited from QEvent

[править] Дополнительные унаследованные члены

• 1 property inherited from QEvent

[править] Подробное описание

The QGraphicsSceneHelpEvent class provides events when a tooltip is requested.

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.

[править] Описание функций-членов

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QGraphicsSceneHelpEvent::~QGraphicsSceneHelpEvent ()

Destroys the event.

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QPointF QGraphicsSceneHelpEvent::scenePos () const

Returns the position of the mouse cursor in scene coordinates at the moment the the help event was sent.

See also screenPos().

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QPoint QGraphicsSceneHelpEvent::screenPos () const

Returns the position of the mouse cursor in screen coordinates at the moment the the help event was sent.

See also scenePos().