QGraphicsSceneHelpEvent Class
QGraphicsSceneHelpEvent 类提供请求工具提示时的事件。更多
Header: | #include <QGraphicsSceneHelpEvent> |
CMake: | find_package(Qt6 REQUIRED COMPONENTS Widgets) target_link_libraries(mytarget PRIVATE Qt6::Widgets) |
qmake: | QT += widgets |
继承: | QGraphicsSceneEvent |
公共函数
virtual | ~QGraphicsSceneHelpEvent() |
QPointF | scenePos() const |
QPoint | screenPos() const |
详细说明
当QGraphicsView 接收到QEvent::ToolTip 类型的QEvent 时,它会创建一个 QGraphicsSceneHelpEvent,并将其转发给场景。您可以使用setToolTip() 在QGraphicsItem 上设置工具提示;默认情况下,QGraphicsScene 显示鼠标位置下 Z 值最高(即最顶端的项目)的QGraphicsItem 的工具提示。
QGraphicsView 当 和 请求帮助时,不会转发事件。如果需要,可以重新实现 () 并将 事件和 类型的 转发到场景。"What's This" status tip QGraphicsView::viewportEvent QStatusTipEvent QEvents QEvent::WhatsThis
另请参阅 QEvent 。
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