Python Tkinter - Scale Widget

Python Tkinter – Scale Widget

Last Updated : 26 Mar, 2020

Tkinter is a GUI toolkit used in python to make user-friendly GUIs.Tkinter is the most commonly used and the most basic GUI framework available in python. Tkinter uses an object-oriented approach to make GUIs.

Note: For more information, refer to Python GUI – tkinter

Scale widget

The Scale widget is used whenever we want to select a specific value from a range of values. It provides a sliding bar through which we can select the values by sliding from left to right or top to bottom depending upon the orientation of our sliding bar.

Syntax:

S = Scale(root, bg, fg, bd, command, orient, from_, to, ..)

Optional parameters

root – root window.
bg – background colour
fg – foreground colour
bd – border
orient – orientation(vertical or horizontal)
from_ – starting value
to – ending value
troughcolor – set colour for trough.
state – decides if the widget will be responsive or unresponsive.
sliderlength – decides the length of the slider.
label – to display label in the widget.
highlightbackground – the colour of the focus when widget is not focused.
cursor – The cursor on the widget ehich could be arrow, circle, dot etc.

Methods

set(value) – set the value for scale.
get() – get the value of scale.

Example 1: Creating a horizontal bar

# Python program to demonstrate 
# scale widget 
  
from tkinter import * 
  
  
root = Tk()   
root.geometry("400x300")  
  
v1 = DoubleVar() 
  
def show1():   
      
    sel = "Horizontal Scale Value = " + str(v1.get()) 
    l1.config(text = sel, font =("Courier", 14))   
  
  
s1 = Scale( root, variable = v1,  
           from_ = 1, to = 100,  
           orient = HORIZONTAL)    
  
l3 = Label(root, text = "Horizontal Scaler") 
  
b1 = Button(root, text ="Display Horizontal",  
            command = show1,  
            bg = "yellow")   
  
l1 = Label(root) 
  
  
s1.pack(anchor = CENTER)  
l3.pack() 
b1.pack(anchor = CENTER) 
l1.pack()  
  
root.mainloop() 

Output:

python-tkinter-scale

Example 2: Creating a vertical slider

from tkinter import *
  
root = Tk()   
root.geometry("400x300")  
v2 = DoubleVar() 
  
def show2(): 
      
    sel = "Vertical Scale Value = " + str(v2.get())  
    l2.config(text = sel, font =("Courier", 14)) 
  
s2 = Scale( root, variable = v2, 
           from_ = 50, to = 1, 
           orient = VERTICAL)  
  
l4 = Label(root, text = "Vertical Scaler") 
  
b2 = Button(root, text ="Display Vertical", 
            command = show2, 
            bg = "purple",  
            fg = "white") 
  
l2 = Label(root) 
  
s2.pack(anchor = CENTER)  
l4.pack() 
b2.pack() 
l2.pack() 
  
root.mainloop() 