how to display a timer in python

Question

hey i am making a program which records desktop screen.

So what i want to do is when ever i click on my start button(tkinter Gui) in my gui window.

It should start a timer like 3.... ,2.... ,1.... in big font directly on my desktop screen and not on my tkinter window. and then my function should start.

How can i do that ..

import tkinter as tk
from tkinter import *

root = Tk()
root.title("our program")
start_cap =tk.button(text='start recording' command=start_capute)
start_cap.pack()
root.mainloop()

Not mentioning the functions and the entire code here as not necessary the code is working fine and i just want to add a new feature of the timer in it.

There are dozens of questions on this site related to timers and clocks. Have you done any research before asking the question? — Bryan Oakley
– Bryan Oakley, Commented Mar 14, 2020 at 14:32

jizhihaoSAMA · Accepted Answer · 2020-03-14 14:24:41Z

2

An minimal example:

import tkinter as tk
# from tkinter import *

def Start():

    def Count(Number):
        if Number == -1:
            win.withdraw()
            print("Start") # what you want to do
            return False
        NumberLabel["text"] = Number
        win.after(1000,Count,Number-1)
    screen_width = root.winfo_screenwidth()
    screen_height = root.winfo_screenheight()

    win = tk.Toplevel()
    win.geometry("+%d+%d"%((screen_width-win.winfo_width())/2,(screen_height-win.winfo_height())/2)) # make it in the center.
    win.overrideredirect(1)
    win.wm_attributes('-topmost',1) # top window
    win.wm_attributes('-transparentcolor',win['bg']) # background transparent.
    NumberLabel = tk.Label(win,font=("",40,"bold"),fg='white')
    NumberLabel.pack()
    win.after(0,lambda :Count(3))
    win.mainloop()

root = tk.Tk()
root.title("our program")
start_cap = tk.Button(text='start recording',command=Start)
start_cap.pack()
root.mainloop()

edited Mar 14, 2020 at 14:24

answered Mar 14, 2020 at 7:20

jizhihaoSAMA

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2 Comments

acw1668 Over a year ago

No need to use global Number. Pass it as an argument to Count().

acw1668 Over a year ago

Use win.after(1000, Count, Number-1) instead of lambda and Number -= 1.

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