QGraphicsSceneHelpEvent 類提供當請求工具提示時的事件。 更多...
| 頭： | #include <QGraphicsSceneHelpEvent> |
| qmake: | QT += widgets |
| Since: | Qt 4.2 |
| 繼承： | QGraphicsSceneEvent |
該類在 Qt 4.2 引入。
| virtual | ~QGraphicsSceneHelpEvent () |
| QPointF | scenePos () const |
| QPoint | screenPos () const |
當 QGraphicsView 接收 QEvent 類型 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 類型 QEvent::WhatsThis to the scene.
另請參閱 QEvent .
[虛擬]
QGraphicsSceneHelpEvent::
~QGraphicsSceneHelpEvent
()
銷毀事件。
Returns the position of the mouse cursor in scene coordinates at the moment the help event was sent.
另請參閱 screenPos ().
Returns the position of the mouse cursor in screen coordinates at the moment the help event was sent.
另請參閱 scenePos ().