########################################
#     My custom QScrollArea            #
#     widget                           #
########################################

class MyScrollArea(QScrollArea):

    def __init__(self, parent):
        super(MyScrollArea, self).__init__(parent)
        ...

        self.setStyleSheet("""QScrollBar:vertical {
                    width: 45px;
                    margin: 45px 0 45px 0;
                    background: #32CC99;
                  }

                  QScrollBar::handle:vertical {
                    border: 10px solid grey;
                    background: white;
                    min-height: 10px;
                  }

                  QScrollBar::add-line:vertical {
                    border: 2px solid grey;
                    background: none;
                    height: 45px;
                    subcontrol-position: bottom;
                    subcontrol-origin: margin;
                  }

                  QScrollBar::sub-line:vertical {
                    border: 2px solid grey;
                    background: none;
                    height: 45px;
                    subcontrol-position: top;
                    subcontrol-origin: margin;
                  }

                  QScrollBar::up-arrow:vertical {
                    border: 5px solid grey;
                    height: 40px;
                    width: 40px
                  }

                  QScrollBar::down-arrow:vertical {
                    border: 5px solid grey;
                    height: 40px;
                    width: 40px
                  }""")
        ...

    ### End init ###

### End Class ###