Prerequisites: Python GUI – tkinter
Python Tkinter is a GUI programming package or built-in library. Tkinter provides the Tk GUI toolkit with a potent object-oriented interface. Python with Tkinter is the fastest and easiest way to create GUI applications. Creating a GUI using Tkinter is an easy task.
Approach
- Importing the module – tkinter, time
- Create the main window (container)
- Add number of widgets to the main window:Button, Entry
- Apply the event Trigger on the widgets.
Below is the implementation.
python3
import timefrom tkinter import *from tkinter import messagebox# creating Tk windowroot = Tk() # setting geometry of tk windowroot.geometry("300x250") # Using title() to display a message in# the dialogue box of the message in the# title bar.root.title("Time Counter") # Declaration of variableshour=StringVar()minute=StringVar()second=StringVar() # setting the default value as 0hour.set("00")minute.set("00")second.set("00") # Use of Entry class to take input from the userhourEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=hour)hourEntry.place(x=80,y=20) minuteEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=minute)minuteEntry.place(x=130,y=20) secondEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=second)secondEntry.place(x=180,y=20) def submit(): try: # the input provided by the user is # stored in here :temp temp = int(hour.get())*3600 + int(minute.get())*60 + int(second.get()) except: print("Please input the right value") while temp >-1: # divmod(firstvalue = temp//60, secondvalue = temp%60) mins,secs = divmod(temp,60) # Converting the input entered in mins or secs to hours, # mins ,secs(input = 110 min --> 120*60 = 6600 => 1hr : # 50min: 0sec) hours=0 if mins >60: # divmod(firstvalue = temp//60, secondvalue # = temp%60) hours, mins = divmod(mins, 60) # using format () method to store the value up to # two decimal places hour.set("{0:2d}".format(hours)) minute.set("{0:2d}".format(mins)) second.set("{0:2d}".format(secs)) # updating the GUI window after decrementing the # temp value every time root.update() time.sleep(1) # when temp value = 0; then a messagebox pop's up # with a message:"Time's up" if (temp == 0): messagebox.showinfo("Time Countdown", "Time's up ") # after every one sec the value of temp will be decremented # by one temp -= 1# button widgetbtn = Button(root, text='Set Time Countdown', bd='5', command= submit)btn.place(x = 70,y = 120) # infinite loop which is required to# run tkinter program infinitely# until an interrupt occursroot.mainloop() |
Output:
