QT: QSS custom qtoolbutton instance

QT:QSS Customize QToolButton example

QToolButton There are three types .
QToolButton No menu . under these circumstances ,QToolButton The style of and QPushButton Exactly the same .
QToolButton There is a menu , And will QToolButton::popupMode Set to QToolButton::DelayedPopup or QToolButton::InstantPopup. under these circumstances ,QToolButton The style is the same as that with a menu QPushButton Exactly the same .
QToolButton Put it QToolButton::popupMode Set to QToolButton::MenuButtonPopup.
We make it as follows ：

  QToolButton { 
     /* all types of tool button */
      border: 2px solid #8f8f91;
      border-radius: 6px;
      background-</