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Python Tkinter Scale

by maxguy71

In this article we look at the Tkinter Scale widget

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

myscale = Scale(top, options)

A list of possible options is given below.

Option Description
activebackground The background color of the widget when it has the focus.
bg The background color of the widget.
bd The border size of the widget. The default is 2 pixels.
command It is set to the procedure which is called each time when we move the slider.
cursor The mouse pointer is changed to the cursor type assigned to this option. It can be an arrow, dot, etc.
digits If the control variable used to control the scale data is of string type, this option is used to specify the number of digits when the numeric scale is converted to a string.
font The font type of the widget text.
fg The foreground color of the text.
from_ It is used to represent one end of the widget range.
highlightbackground The highlight color when the widget doesn’t have the focus.
highlightcolor The highlight color when the widget has the focus.
label This can be set to some text which can be shown as a label with the scale. It is shown in the top left corner if the scale is horizontal or the top right corner if the scale is vertical.
length This represents the length of the widget. It represents the X dimension if the scale is horizontal or y dimension if the scale is vertical.
orient This can be set to horizontal or vertical depending upon the type of the scale.
relief This represents the type of the border. The default is FLAT.
repeatdelay This option tells the duration up to which the button is to be pressed before the slider starts moving in that direction repeatedly. The default is 300 ms.
resolution This is set to the smallest change which is to be made to the scale value.
showvalue The value of the scale is shown in the text form by default. We can set this option to 0 to suppress the label.
sliderlength It represents the length of the slider window along the length of the scale. The default is 30 pixels.
state The scale widget is active by default. We can set this to DISABLED to make it unresponsive.
takefocus The focus cycles through the scale widgets by default. We can set this option to 0 if we don’t want this to happen.
tickinterval The scale values are displayed on the multiple of the specified tick interval. The default value is 0.
to It represents a float or integer value that specifies the other end of the range represented by the scale.
troughcolor the color of the through.
variable the control variable for the scale.
width the width of the through part of the widget.

Methods

Method Description
get() This is used to get the current value of the scale.
set(value) This is used to set the value of the scale.

 

Examples

Here are some examples

 

import tkinter as tk
 
window = tk.Tk()
window.title('Scale')
window.geometry('500x300') 
 
l = tk.Label(window, bg='white', fg='black', width=20, text='empty')
l.pack()
 
def printvalue(v):
    l.config(text='Value is ' + v)

scexample = tk.Scale(window, label='Move the slider', from_=0, to=10, orient=tk.HORIZONTAL, length=200, showvalue=0,tickinterval=2, resolution=0.1, command=printvalue)
scexample.pack()
 
window.mainloop()

This displayed the following

and a vertical one

 
window = tk.Tk()
window.title('Scale')
window.geometry('500x300') 
 
l = tk.Label(window, bg='white', fg='black', width=20, text='empty')
l.pack()
 
def printvalue(v):
    l.config(text='Value is ' + v)

scexample = tk.Scale(window, label='Move the slider', from_=0, to=10, orient=tk.VERTICAL, length=200, showvalue=0,tickinterval=2, resolution=0.1, command=printvalue)
scexample.pack()
 
window.mainloop()

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