QGraphicsSceneHelpEvent Class Reference
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QtGui

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

继承 QGraphicsSceneEvent .

方法

QPointF scenePos ( self )
QPoint screenPos ( self )

详细描述

The QGraphicsSceneHelpEvent class provides events when a tooltip is requested.

当 QGraphicsView 接收 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.

方法文档编制

QPointF QGraphicsSceneHelpEvent.scenePos ( self )

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

另请参阅 screenPos ().

QPoint QGraphicsSceneHelpEvent.screenPos ( self )

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

另请参阅 scenePos ().