PyQt - not showing instance of FigureCanvasQTAgg on QtWidget of TabPane - matplotlib

Question

I'm continuing project described more in that question: PyQt - can't read Excel file
Basically my code looks like this right now:
# This is a sample Python script.
# Press Shift+F10 to execute it or replace it with your code.
# Press Double Shift to search everywhere for classes, files, tool windows, actions, and settings.
import csv
import sys
import numpy as np
from PyQt6 import QtWidgets
from PyQt6.QtWidgets import QDialog, QApplication, QFileDialog, QTableWidget, QTableWidgetItem, QTabWidget, QWidget
from PySide6.QtCore import Slot, SIGNAL
from PyQt6.uic import loadUi
import pandas as pd
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from matplotlib.figure import Figure
class MplCanvas(FigureCanvasQTAgg):
def __init__(self, parent=None, width=12, height=5, dpi=100):
fig = Figure(figsize=(width, height), dpi=100)
self.axes = fig.add_subplot(111)
super(MplCanvas, self).__init__(fig)
class MainWindow(QDialog):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent=parent)
self.initUI()
def initUI(self):
loadUi('gui.ui', self)
self.btnShow.setEnabled(False)
self.btnLoad.setEnabled(False)
self.btnBrowse.clicked.connect(self.browseFiles)
self.btnLoad.clicked.connect(self.loadExcelData)
self.btnClean.clicked.connect(self.cleanData)
self.btnShow.clicked.connect(self.showGraphs)
#Slot()
def browseFiles(self):
fname = QFileDialog.getOpenFileName(self, 'Open a file', 'C:\\', "Excel (*.xls *.xlsx)")
self.filename.setText(fname[0])
self.btnLoad.setEnabled(True)
#Slot()
def loadExcelData(self):
column_names = ["Action", "TimeOfFailure", "ReverseRankR", "S(i)", "Cdf", "Ppf", "LogTime"]
df = pd.read_excel(self.filename.text(), "Sheet1", names=column_names)
if df.size == 0:
return
self.tableExcelData.setRowCount(df.shape[0])
self.tableExcelData.setColumnCount(df.shape[1])
self.tableExcelData.setHorizontalHeaderLabels(df.columns)
for row in df.iterrows():
values = row[1]
for col_index, value in enumerate(values):
tableItem = QTableWidgetItem(str(value))
self.tableExcelData.setItem(row[0], col_index, tableItem)
self.btnLoad.setEnabled(False)
self.btnShow.setEnabled(True)
#Slot()
def cleanData(self):
self.btnLoad.setEnabled(True)
self.btnShow.setEnabled(False)
self.tableExcelData.setRowCount(0)
self.tableExcelData.setColumnCount(0)
#Slot()
def showGraphs(self):
timeOfDays = []
cdf = []
ppf = []
logTime = []
for row in range(self.tableExcelData.rowCount()):
isFailure = False
for column in range(self.tableExcelData.columnCount()):
value = self.tableExcelData.item(row, column)
if(column == 0 and str(value.text()) == 'F'):
isFailure = True
if isFailure == True:
if(column == 1): #TimeOfDays
value = int(value.text())
timeOfDays.append(value)
elif(column == 4): #CDF
value = float(value.text())
cdf.append(value)
elif(column == 5):
value = float(value.text())
ppf.append(value)
elif(column == 6):
value = float(value.text())
logTime.append(value)
print(timeOfDays)
print(cdf)
print(ppf)
print(logTime)
#fig = Figure(figsize=(12,5), dpi=100)
#firstSubplot = fig.add_subplot(111)
#firstSubplot.scatter(timeOfDays, ppf, '*')
#firstSubplot.plot(timeOfDays, ppf)
#fig.show()
#plt.plot(timeOfDays, ppf)
#plt.show()
try:
canvasFig = MplCanvas()
canvasFig.axes.scatter(timeOfDays, ppf, s=5, color='red')
canvasFig.axes.plot(timeOfDays, ppf)
canvasFig.draw()
self.tabFirstGraph.setCentralWidget(canvasFig)
except Exception as e:
print('Error: ' + str(e))
#canvas = FigureCanvasTkAgg(fig, master=self)
#canvas.get_tk_widget().pack()
#canvas.draw()
# Press the green button in the gutter to run the script.
if __name__ == '__main__':
app = QApplication(sys.argv)
mainWindow = MainWindow()
mainWidget = QtWidgets.QStackedWidget()
mainWidget.addWidget(mainWindow)
mainWidget.show()
sys.exit(app.exec())
# See PyCharm help at https://www.jetbrains.com/help/pycharm/
I'm trying to generate two graphs (now it's code for only creation of one):
try:
canvasFig = MplCanvas()
canvasFig.axes.scatter(timeOfDays, ppf, s=5, color='red')
canvasFig.axes.plot(timeOfDays, ppf)
canvasFig.draw()
self.tabFirstGraph.setCentralWidget(canvasFig) #
except Exception as e:
print('Error: ' + str(e))
I tried to create another TabPane ("tabFirstGraph" as name of this object) and set canvas figure object to fill this QWidget instance. But I'm getting constantly this error:
Error: 'QWidget' object has no attribute 'setCentralWidget'
I assumed already that problem is with line above (QWidget, QTableWidget don't have this method). But how can I show my canvas figure graph on "First Graph" Tab Pane?
Thanks in advance for your all answers. :)