问传递PyQt5嵌入图的matplotlib图/轴

EN

# -*- coding: utf-8 -*-

import sys
import numpy as np

from PyQt5 import QtCore, QtWidgets, uic

import matplotlib
matplotlib.use('QT5Agg')

import matplotlib.pylab as plt

from matplotlib.backends.qt_compat import QtCore, QtWidgets, is_pyqt5
from matplotlib.backends.backend_qt5agg import FigureCanvas, NavigationToolbar2QT as NavigationToolbar
from matplotlib.figure import Figure

class Analysis():

    def __init__(self):

        self.fig, self.ax1 = plt.subplots()

        bins = np.arange(0.1, 2, 0.02)
        data = np.random.rand(3,2)        
        self.ax1.hist(data, bins, alpha=0.6, density=False, cumulative=False)      

    def getAxis(self):
        return self.ax1


class MyWindow(QtWidgets.QMainWindow):

    def __init__(self):

        super(MyWindow, self).__init__()
        uic.loadUi('test.ui', self) 

        # default data
        data = np.array([0.7,0.7,0.7,0.8,0.9,0.9,1.5,1.5,1.5,1.5])        
        self.fig, self.ax1 = plt.subplots()

        bins = np.arange(0.1, 2, 0.02)
        n1, bins1, patches1 = self.ax1.hist(data, bins, alpha=0.6, density=False, cumulative=False)

        # plot
        self.plotWidget = FigureCanvas(self.fig)
        self.lay = QtWidgets.QVBoxLayout(self.content_plot)  
        self.lay.setContentsMargins(0, 0, 0, 0)      
        self.lay.addWidget(self.plotWidget)

        # add toolbar
        self.addToolBar(QtCore.Qt.BottomToolBarArea, NavigationToolbar(self.plotWidget, self))        

        # button event
        self.pushButton.clicked.connect(self.update)

        # show window
        self.show() 

    #############################################     

    def update(self):

        # clear local axis
        self.ax1.cla()   

        # get axis from analysis object
        a = Analysis()        
        ax = a.getAxis()

        # ???????????
        self.ax1 = ax

        # draw the new content
        self.fig.canvas.draw_idle()  



if __name__ == '__main__':

    app = QtWidgets.QApplication(sys.argv)
    window = MyWindow()
    sys.exit(app.exec_())