Qt5.14.2浮动窗口的例子

QDockWidget *shapesDockWidget = new QDockWidget(tr("Shapes"));//建立浮动窗口    shapesDockWidget->setObjectName("shapesDockWidget");//设置其对象名    shapesDockWidget->setWidget(w_fileDir);//设置w_fileDir为浮动的窗口    shapesDockWidget->setAllowedAreas(Qt::LeftDockWidgetArea|Qt::RightDockWidgetArea);//运行左右侧进行浮动    addDockWidget(Qt::RightDockWidgetArea,shapesDockWidget);//在构造函数的窗口中加入浮动窗口

video: https://mp.weixin.qq.com/mp/readtemplate?t=pages/video_player_tmpl&action=mpvideo&auto=0&vid=wxv_3645526900895842320例子借鉴C++ GUI Qt4 编程(第二版) 120页