How to quit the program in while loop using push-button in PyQt

Question

I have the following code which will start after clicking the \'Start\' button in PyQt:

def Start(self):
  import time
  import os
  import RPi.GPIO as GPIO
         


        

Answer 1

There is no need to do anything other than what I suggested in your other question on this topic: just use processEvents. As long as you can call it frequently enough (but not too frequently), it should do exactly what you want. Using your second example, the following works fine for me:

  def Start(self):
    if not self.started:
        self.started = True
        self.StartLoop()

  def Stop(self):
    if self.started:
        self.started = False

  def StartLoop(self):
    DEBUG = 1
    while self.started:
        print "LED on "
        time.sleep(0.05)
        print "LED off "
        time.sleep(0.085)
        QtGui.qApp.processEvents()