我正在创建一个界面，通过单击按钮在另一个选项卡中绘制图形。我希望这些图形在滚动区域中并排绘制。问题是，当我绘制图形时，图形实际上会缩小以适合小部件，而不是滚动条进行可视化
这里有一个最小的可重复的例子

import sys
from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QPushButton,
                             QLabel, QVBoxLayout, QHBoxLayout, QMessageBox, 
                             QLineEdit,QComboBox, QAction, QTabWidget, QScrollArea)

from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar

from matplotlib.figure import Figure
import matplotlib.pyplot as plt

from PyQt5.QtCore import Qt
from PyQt5 import QtGui

class MainWindow(QMainWindow):    

    #view (GUI)
    def __init__(self, parent = None):
        #initalizer
        super(MainWindow, self).__init__(parent)

        #Window
        self.setWindowTitle("DataVisualizationPrototype")
        self.setGeometry(400, 200, 900, 800)
        self.activateWindow()
        self.raise_()

        self.tab_widget = TabWidget(self)
        self.setCentralWidget(self.tab_widget)

class TabWidget(QWidget):

    def __init__(self, parent):
        super(QWidget, self).__init__(parent)
        self.layout =QVBoxLayout(self)

        self.tabs = QTabWidget()
        self.tab1 = QWidget()
        self.tab2 = QWidget()
        self.tabs.addTab(self.tab1, "Home")
        self.tabs.addTab(self.tab2, "Comparison")
        self.layout.addWidget(self.tabs)
        self.setLayout(self.layout)

        #HOME PAGE
        #==========================================
        #GeneralLayout
        self.tab1layout = QVBoxLayout()
        self.tab1.setLayout(self.tab1layout)
        self.tab1layout.sizeHint()

        plotButton = QPushButton()
        self.tab1layout.addWidget(plotButton)
        plotbutton.clicked.connect(onclick2)

        #COMPARISON TAB
        #==========================================
        #GeneralLayout
        self.tab2layout = QVBoxLayout()
        self.tab2.setLayout(self.tab2layout)
        self.tab2layout.sizeHint()

        self.compGraphLayout = QHBoxLayout()
        self.compGraphLayout.addStretch()

        self.compScroll = QScrollArea()
        self.compScroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
        self.compScroll.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.scrollWidget = QWidget()

        self.compScroll.setWidget(self.scrollWidget)
        self.compScroll.setWidgetResizable(True)

        self.tab2layout.addWidget(self.compScroll)
        self.scrollWidget.setLayout(self.compGraphLayout)

   def onclick2(self, event):
        self.plotLayout = QVBoxLayout()
        self.fig = plt.figure()
        self.plotLayout.addWidget(FigureCanvas(self.fig))

        self.plotLayout.addWidget(NavigationToolbar
                                 (FigureCanvas(self.fig),
                                  self.scrollWidget))
        self.compGraphLayout.addLayout(self.plotLayout)

# Plot MRE

        self.fig.plt.plot([1, 2, 3, 4])
        self.fig.plt.ylabel('some numbers')

        FigureCanvas(self.fig).adjustSize()

def main():

    pt1 = QApplication(sys.argv)
    view = MainWindow()
    view.show()

    sys.exit(pt1.exec())

if __name__ == '__main__':
    main()