qt设置窗口位置设置

 setGeometry(QStyle::alignedRect(

                    Qt::RightToLeft,

                    Qt::AlignCenter,

                    size(),

                    qApp->desktop()->availableGeometry()));

   setGeometry(QStyle::alignedRect(

                    Qt::RightToLeft,

                    Qt::AlignBottom,

                    size(),

                    qApp->desktop()->availableGeometry()));

    show();

  setAttribute(Qt::WA_ShowWithoutActivating);

    setWindowFlags(

                Qt::Window | // Add if popup doesn't show up

                Qt::FramelessWindowHint | // No window border

                Qt::WindowDoesNotAcceptFocus | // No focus

                Qt::WindowStaysOnTopHint // Always on top

                );