How to cancel a running script in tkinter

Question

I'm trying to make an aplication for my Raspberry Pi. An intervalometer for photographic purposes. I have made a GUI with tkinter but I can't found the way to cancel a running script , because all the buttons are blocked when the script is running. May be it's no possible because my scripts contains loops ( for i in range()... I have been trying the ".after" method but this one just stop the script without cancelling it. Thanks in advence for your help

Welcome to SO. Please read how to ask; you should provide a minimal complete verifiable example of your script — Foon
– Foon, Commented Feb 16, 2017 at 14:46
You've asked this same question on the Raspberry Pi forums. raspberrypi.org/forums/… If you add your code on the forums inside [code][/code] tags I can help you. — scotty3785
– scotty3785, Commented Feb 16, 2017 at 15:31
I'm very beginner and I don't know exactly how to insert code... Thanks — josepraspi
– josepraspi, Commented Feb 17, 2017 at 15:31
I start to see the light.... This is the situation now, not the best , but I can stop and reset the START script: — josepraspi
– josepraspi, Commented Feb 17, 2017 at 15:34
Sorry I want to add CODE to this question but I don't know how to do it — josepraspi
– josepraspi, Commented Feb 17, 2017 at 15:44

Community · Accepted Answer · 2017-05-23 12:34:04Z

2

You can try to use threading or multiprocess. You can refer to this post to find out more about it. Also, if you just want to stop the script from running, you can either send SIGKILL signal to your program from Terminal (the command is killall Python -9) or add a button in your program that calls sys.exit()

edited May 23, 2017 at 12:34

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answered Feb 17, 2017 at 1:44

Mia

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Mia Over a year ago

@josepraspi You can choose to accept the answers that you found helpful. Just click on the check symbol (✓) on the left side of each answer.

josepraspi · Accepted Answer · 2017-02-17 15:47:44Z

from Tkinter import *

class Example:

def __init__(self, master):

    self.etfilm = Label(root,width=12, font=('arial narrow', 14, 'normal'),fg="white", bg="green")
    self.etfilm.grid(row=0, column=0,columnspan=1, padx=3, pady=2, sticky=NSEW)
    self.etstatus = Label(root,width=12, font=('arial narrow', 14, 'normal'),bg="yellow")
    self.etstatus.grid(row=0, column=1,columnspan=1, padx=3, pady=2, sticky=NSEW)
    self.textBox = Text(root,height= 1,width=2, relief=SUNKEN, font=('arial', 18, 'normal'),)
    self.textBox.grid(row=0, column=2, ipadx=13, padx=0, sticky=NSEW)
    self.botshoot = Button(root, width=18, font=('arial narrow', 30, 'normal'), text="START ", activebackground="#00dfdf")
    self.botshoot.grid(row=4, rowspan=2, column=0,columnspan=3,ipady=15,pady=1, sticky=NSEW)
    self.botshoot.configure(command=self.start)
    self.botkam = Button(root,width=10, font=('arial', 24, 'normal'), text="VIDEO SETTINGS", activebackground="#00dfdf")
    self.botkam.grid(row=6, rowspan=3, column=0,columnspan=2, pady=1, sticky=NSEW)
    self.botkamStop = Button(root,width=3, font=('arial', 24, 'normal'), text="STOP", activebackground="#00dfdf")
    self.botkamStop.grid(row=6, rowspan=3, column=2, pady=1, sticky=NSEW)
    self.botSelf = Button(root,width=10, font=('arial', 24, 'normal'), text="ACTIVATE SELFTIMER", activebackground="#00dfdf")
    self.botSelf.grid(row=9, rowspan=3, column=0,columnspan=2, pady=1, sticky=NSEW)
    self.botSelf1 = Button(root,width=3, font=('arial', 24, 'normal'), text="STOP", activebackground="#00dfdf")
    self.botSelf1.grid(row=9, rowspan=3, column=2, pady=1, sticky=NSEW)       
    self.botConf = Button(root,heigh=2, font=('arial', 18, 'normal'), text="CONFIGURE", activebackground="red")
    self.botConf.grid(row=12, rowspan=3, column=0,columnspan=1, pady=1, sticky=NSEW)
    self.botStop = Button(root,heigh=2, font=('arial', 18, 'normal'), text="STOP/RESET", activebackground="red")
    self.botStop.grid(row=12, rowspan=3, column=1,columnspan=2, pady=1, sticky=NSEW)
    self.botStop.configure(state=DISABLED,command=self.stop)

def start(self):
    self.count = 0
    self.cancel_id = None
    self.botConf.configure(state=DISABLED)
    self.botshoot.configure(state=DISABLED)
    self.botStop.configure(state=NORMAL)
    self.counter()

def counter(self):
    self.textBox.delete("1.0", END)
    if self.count < 10:
        self.count += 1
        self.textBox.insert(END, str(self.count)+'\n\n')
        self.cancel_id = self.textBox.after(1000, self.counter)

        root.update_idletasks()
        print(self.count)
def stop(self):
    if self.cancel_id is not None:
        self.textBox.after_cancel(self.cancel_id)
        self.cancel_id = None
        self.textBox.insert(END, 0)
        self.textBox.delete("1.0", END)
        self.botConf.configure(state=NORMAL)
        self.botshoot.configure(state=NORMAL)

root=Tk() Example(root) root.mainloop()

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