Mousemoveevent qt 功能：QT 实现框选. This allows the widget to handle all mouse interactions within its application, regardless of the cursor's location on the screen. See also buttons() and Qt::MouseButton. プロジェクトを作成し,生成されたwidgetを以下のように変更します. . 11 ). I try to print the boundingRect(), in ItemChange() with ItemPositionChange flag, but it doesn't update. Even the topic is quite old I publish here my solution for anyone that might have this issue now. 鼠标事件的重要性. How can I set widget1::mouseMoveEvent to be called for every mouseMoveEvent within widget1? Jan 18, 2019 · 文章浏览阅读7k次，点赞7次，收藏12次。QGraphicsItem的mouseMoveEvent()函数必须鼠标按下的情况下进行move才会触发。QWidget的mouseMoveEvent()函数可以通过设置setMouseTracking(true)在鼠标不需要按下的情况下，触发鼠标move事件。 Aug 18, 2020 · 最近在Qt的学习中遇到了一个问题，就是重写了mouseMoveEvent，在其中打印鼠标移动的坐标信息却无效 在Qt中要捕捉鼠标移动信息需要重写mouseMoveEvent，但是mouseMoveEvent为了不太消耗资源在默认情况下是需要按下鼠标移动才能捕捉到，想要在鼠标没有按下的情况下也能捕捉鼠标，需要对窗口设置 Qt's main event loop (QCoreApplication::exec()) fetches native window system events from the event queue, translates them into QEvents, and sends the translated events to QObjects. wqprnfzjpncssfbjjcmvwafhlxwvbsjghyeyrckemntyslbfrjakbgtxpvgsodazxqutpvt