Voortgangsbalk

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Met een voortgangs balk kun je het verloop laten zien.

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui, QtCore

class Venster(QtGui.QWidget):
    
    def __init__(self):
        super(Venster, self).__init__()
        
        self.initUI()
        
    def initUI(self):      

        self.pbar = QtGui.QProgressBar(self)
        self.pbar.setGeometry(30, 40, 280, 25)

        self.btn = QtGui.QPushButton('Start', self)
        self.btn.move(40, 80)
        self.btn.clicked.connect(self.doAction)

        self.timer = QtCore.QBasicTimer()
        self.step = 0
        
        self.setGeometry(400, 400, 320, 160)
        self.setWindowTitle('Voortgangsbalk')
        self.show()
        
    def timerEvent(self, e):
      
        if self.step >= 100:
        
            self.timer.stop()
            self.btn.setText('Klaar')
            return
            
        self.step = self.step + 1
        self.pbar.setValue(self.step)

    def doAction(self):
      
        if self.timer.isActive():
        self.timer.stop()
        self.btn.setText('Start')
            
        else:
            self.timer.start(100, self)
            self.btn.setText('Stop')
        
def main():
    
    app = QtGui.QApplication(sys.argv)
    ex = Venster()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

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