pyqt5 QScrollArea設置在自定義側(任何位置)

本例設置爲垂直左側scroll

主要思想是利用一個長度爲0的mid_frame，高度爲待設置qwidget的高度，用mid_frame的moveEvent事件驅動qwidget的move

我項目的效果圖：

代碼及註釋

from PyQt5.Qt import *
from sys import argv


# 主窗口
class Main(QMainWindow):
    def __init__(self):
        super().__init__(None)
        self.setGeometry(500, 500, 500, 500)

        # 實例化
        self.main = MainFrame(self)
        self.scroll = ScrollFrame(self, self.main, 40)

        self.show()

    def resizeEvent(self, e):
        # resize改變scroll窗口的高度使其與本身相同
        self.scroll.resize(self.scroll.width(), self.height())

 #須要配備scroll的窗口
class MainFrame(QFrame):
    def __init__(self, father):
        super().__init__(father)
        self.father = father
        self.setGeometry(50, 50, 100, 1500)
        
        # 測試按鈕
        for i in range(15):
            b = QPushButton(str(i), self)
            b.setGeometry(0, i*100, 100, 100)

    # 自定義滾輪事件
    def wheelEvent(self, e):
        if e.angleDelta().y() > 0:
            self.move(self.x(), self.y() + 60)
        else:
            self.move(self.x(), self.y() - 60)
        # 改變scroll的值
        self.father.scroll.bar.setValue(abs(self.y()))

    def resizeEvent(self, e):
        # resize改變mid_frame的高度使其與本身相同
        self.father.scroll.mid_frame.setGeometry(0, 0, 0, self.height())


# 承載scrollarea的窗口
class ScrollFrame(QFrame):
    def __init__(self, father, parent, pos_x):
        super().__init__(father)
        self.parent_, self.father, self.pox_x = parent, father, pos_x

        self.mid_frame = MidFrame(self)
        self.mid_frame.setGeometry(0, 0, 0, self.parent_.height())

        self.scroll = QScrollArea()
        # 實例化verticalbar以供改變scroll的值
        self.bar = self.scroll.verticalScrollBar()
        # 綁定中間窗口
        self.scroll.setWidget(self.mid_frame)
        # 自動隱藏和出現
        self.scroll.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)

        # 加入到承載frame
        layout = QGridLayout(self)
        layout.addWidget(self.scroll, 0, 0)
        self.setLayout(layout)

        # 設置承載fram的size和scrollarea同樣
        self.setGeometry(pos_x, 0, 20, self.father.height())

    def resizeEvent(self, e):
        # resize改變scroll的s高度使其與本身同樣
        self.scroll.setGeometry(0, 0, 20, self.height())


# 接受scroll事件的中間窗口
class MidFrame(QFrame):
    def __init__(self, father):
        super().__init__(father)
        self.father = father

    def moveEvent(self, e):
        # move事件綁定實際滾動窗口的move
        self.father.parent_.move(self.father.parent_.x(), e.pos().y())


app = QApplication(argv)
main = Main()
app.exec_()

本例效果：