code: def enterEvent(self, event):
          
  
          if self.__checkable:
              not self.__checked and self.setPixmap(self.__hover_pixmap)
          else:
              self.setPixmap(self.__hover_pixmap)
docs: Reimplements the :meth:`QLabel.enterEvent` method.
  
          :param event: QEvent.
          :type event: QEvent