如何在状态栏中实现进度指示器控制状态栏进度知进示器-How carry out progress indicator a control in the appearance column

功能完善的Qt飞行仪表指示器合集，包含完整PFD，NAV，高度指示，空速指示，飞行姿态指示器等-This is collection of Qt4 and Qt5 widgets of flight instruments, inluding Attitude Indicator, Airspeed Indicator, Vertical Speed Indicator, Turn Indicator, Horizontal Situation Indicator, Primary Flight