Tanggal :September 26, 2020

tk3. Button and StringVar in Tkinter

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The themed widgets from Tkinter will be used from now on, so the additional import in the code below.

The function increment, defined in the code, adds 1 to value currently held in a label.

Here, there are 3 widgets in total, within the Frame widget.

The 3 widgets take 3 of the 4 positions in a 2 by 2 grid. The button widget has text ‘+’ and pressing it will invoke the increment function.

There are 2 labels. The first has the name label and is static with text of ‘Counter’. The second, label1, can have the text updated using a StringVar object. We initialize it as ‘0’ and update via the increment function.

# tk3.py
from tkinter import *
from tkinter.ttk import *

def increment():
a = int(counter.get())

root.title('Button Counter')
frame = Frame(root)
button = Button(frame, text='+',
command = increment, pad = 5)
button.grid(row = 1, column= 0)
label = Label(frame, text = 'Counter', pad = 5)
label.grid(row = 0, column = 1)
counter = StringVar()
label1 = Label(frame, textvariable = counter, pad = 5)
label1.grid(row = 1, column = 1)



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