Python PyQt5 进度条没有进展

Posted 2023-03-30

【中文标题】Python PyQt5 进度条没有进展

【英文标题】：Python PyQt5 Progress Bar is not progressing

【发布时间】：2016-12-27 19:12:36

【问题描述】：

所以基本上我有一些程序可以在后台显示逐行读取 excel 文件的进度。到目前为止，我有以下代码：

excelresult.py：

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import pyqtSlot
from PyQt5.QtCore import Qt, QBasicTimer
import os, sys, xlrd, threading, time, pythoncom
import win32com.client
from time import sleep
from test import MyGlobals


class ExcelCheck(threading.Thread):
progPercent = 0

def __init__(self):
    threading.Thread.__init__(self)
    self.event = threading.Event()

def run(self):
    pythoncom.CoInitialize()
    try:
        while not self.event.is_set():
            excel = win32com.client.Dispatch("Excel.Application")
            wb = excel.ActiveWorkbook
            ws = wb.Worksheets("TC")
            va_title = ws.Range(ws.Range('I7'), ws.Range('I700'))
            i = 0
            for r in va_title.Cells:
                if r.Text != '':
                    i = i + 1
                    # print(r.Text)
            # print(i)
            # print(round(i / 178.0 * 100,0))
            # rounding off
            progPercent = round(i / 178.0 * 100.0)
            MyGlobals.x=progPercent

            print(progPercent)
        return progPercent
    except:
        print('Excel is not executed')



        # sleep(1)
        # self.event.wait()

def stop(self):
    self.event.set()

scm.py

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

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import pyqtSlot
from PyQt5.QtCore import QObject, pyqtSignal
from PyQt5.QtCore import Qt, QBasicTimer
import os, sys, xlrd, win32com.client, xlwt, threading, time
from time import sleep
from ExcelResult import *
from test import MyGlobals
import threading

class Ui_MainWindow(object):
def __init__(self):
    super().__init__()
    self.btn_active = False
    print('init_false')


def startBtnClicked(self):
    self.btnStart.setText('start!')
    self.btn_active = True

    print(self.btn_active)
    tmr = ExcelCheck()
    tmr.start()

    while(MyGlobals.x<=100):

        #print (MyGlobals.x)
        self.progressBar.setValue(MyGlobals.x)

    # self.progressBar.minimum = 1
    # self.progressBar.maximum = 100
    # for progPercent in range(1, 101):
    #     self.progressBar.setValue(progPercent)
    #     time.sleep(1)
def exitBtnClicked(self):
    # self.ExcelCheck()
    self.btn_active = False
    print(self.btn_active)
    # os.system("taskkill /f /im Scm21.Client.exe")
    # self.close()
    # Stop the progress of python
    self.sys.exit()
    tmr = ExcelCheck()
    tmr.stop()

def setupUi(self, MainWindow):
    MainWindow.setObjectName("MainWindow")
    MainWindow.resize(446, 207)

    self.centralwidget = QtWidgets.QWidget(MainWindow)
    self.centralwidget.setObjectName("centralwidget")

    self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
    self.progressBar.setGeometry(QtCore.QRect(40, 70, 381, 23))
    self.progressBar.setProperty("value", 0)
    self.progressBar.setObjectName("progressBar")

    self.btnStart = QtWidgets.QPushButton(self.centralwidget)
    self.btnStart.setGeometry(QtCore.QRect(110, 110, 75, 23))
    self.btnStart.setObjectName("btnStart")
    self.btnStart.clicked.connect(self.startBtnClicked)

    self.btnExit = QtWidgets.QPushButton(self.centralwidget)
    self.btnExit.setGeometry(QtCore.QRect(260, 110, 75, 23))
    self.btnExit.setObjectName("btnExit")
    self.btnExit.clicked.connect(self.exitBtnClicked)

    MainWindow.setCentralWidget(self.centralwidget)
    self.menubar = QtWidgets.QMenuBar(MainWindow)
    self.menubar.setGeometry(QtCore.QRect(0, 0, 446, 21))
    self.menubar.setObjectName("menubar")
    MainWindow.setMenuBar(self.menubar)
    self.statusbar = QtWidgets.QStatusBar(MainWindow)
    self.statusbar.setObjectName("statusbar")
    MainWindow.setStatusBar(self.statusbar)
    self.retranslateUi(MainWindow)
    QtCore.QMetaObject.connectSlotsByName(MainWindow)

def retranslateUi(self, MainWindow):
    _translate = QtCore.QCoreApplication.translate
    MainWindow.setWindowTitle(_translate("MainWindow", "SCM21"))
    self.btnStart.setText(_translate("MainWindow", "Start"))
    self.btnExit.setText(_translate("MainWindow", "Exit"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

还有，test.py

class MyGlobals(object):
    x = 0

所以，我可以使用 test.py 将 ExcelResult.py 中的 ProgPercent 值获取到 scm.py 中，但完全不知道如何更新进度条值。

我尝试使用循环，但它会挂起 GUI。

谢谢。

【问题讨论】：

将 return progPercent 改为 return self.progPercent

我建议你使用 QThread 而不是 threading.Thread

@eyllanesc 我已经获得了进度百分比值，它会有什么不同？

另外，我完全不知道如何使用 Qthread 方法。

【参考方案1】：

使用Qthread：

import time
from PyQt5 import QtCore
from PyQt5 import QtWidgets


class ExcelCheck(QtCore.QThread):
    updated = QtCore.pyqtSignal(int)
    running = False

    def __init__(self, parent=None):
        super(ExcelCheck, self).__init__(parent)
        self.progPercent = 0
        self.running = True

    def run(self):
        while self.running:
            self.progPercent += 1
            self.progPercent %= 100
            self.updated.emit(int(self.progPercent))
            time.sleep(0.1)

    def stop(self):
        self.running = False


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent=parent)
        self.setupUi(self)
        self.btn_active = False

    def startBtnClicked(self):
        self.btnStart.setText('start!')
        self.btn_active = True
        self.tmr = ExcelCheck(self)
        self.tmr.updated.connect(self.updateValue)
        self.tmr.start()

    def updateValue(self, data):
        self.progressBar.setValue(data)

    def exitBtnClicked(self):
        # self.ExcelCheck()
        self.btn_active = False
        self.tmr.stop()
        self.sys.exit()

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(446, 207)

        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.progressBar = QtWidgets.QProgressBar(self.centralwidget)
        self.progressBar.setGeometry(QtCore.QRect(40, 70, 381, 23))
        self.progressBar.setProperty("value", 0)
        self.progressBar.setObjectName("progressBar")

        self.btnStart = QtWidgets.QPushButton(self.centralwidget)
        self.btnStart.setGeometry(QtCore.QRect(110, 110, 75, 23))
        self.btnStart.setObjectName("btnStart")
        self.btnStart.clicked.connect(self.startBtnClicked)

        self.btnExit = QtWidgets.QPushButton(self.centralwidget)
        self.btnExit.setGeometry(QtCore.QRect(260, 110, 75, 23))
        self.btnExit.setObjectName("btnExit")
        self.btnExit.clicked.connect(self.exitBtnClicked)

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 446, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "SCM21"))
        self.btnStart.setText(_translate("MainWindow", "Start"))
        self.btnExit.setText(_translate("MainWindow", "Exit"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

【讨论】：

嘿，谢谢。但是，当我在此替换进度更新逻辑时，QT 窗口会立即关闭而不显示任何进度。

嘿，我搞定了，但退出仅在开始时工作几秒钟，在进度之后，如果我们按下退出，窗口以及退出变得无响应并且窗口挂起。有什么建议吗？