Tkinter - Scale

INTRODUCTION

Scales (Sliders) are used to select among a range of numeric values.

# scale1.py
import tkinter as tk

def show_values():
    print("{} {}".format(scale1.get(), scale2.get()))   # using get() method

root = tk.Tk()   # root widget

scale1 = tk.Scale(root, from_=0, to=50, label="Power",
    tickinterval=10, resolution=5, length=200)
scale1.set(10)   # initial value
scale1.grid()

scale2 = tk.Scale(root, from_=0, to=200, orient=tk.HORIZONTAL,
    resolution=10, label="Velocity")
scale2.grid()

button = tk.Button(root, text='Show', command=show_values)
button.grid()

root.mainloop()

Selected keyword arguments in Scale()

master=root     # the first argument
from_=0   # minimum value ('from_' because 'from' is a keyword)
to=50   # maximum value
variable=var
command=lambda value: print(value)
tickinterval=10   # the number of units between marks (default no marks)
resolution=5   # the number of units thats the scale's value jumps (default 1)
showvalue=tk.NO   # or tk.YES (default); show the scale's current value
orient=tk.VERTICAL   # default
orient=tk.HORIZONTAL
length=200   # in points (pixels)

# scale2.py (using 'variable' and 'command')
# Note that different scales may share the same variable and then
# they are synchronized.
import tkinter as tk

def show_values():
    print ( "{} {}".format(var1.get(), var2.get()) )   # variables!

root = tk.Tk()   # root widget

var1 = tk.DoubleVar()
var1.set(10)   # initial value for the variable
var2 = tk.DoubleVar()

scale1 = tk.Scale(root, from_=0, to=50, variable=var1,
    tickinterval=10, showvalue=tk.NO, length=200,
    command=lambda value: print(value))
scale1.grid()

scale2 = tk.Scale(root, from_=0, to=1, orient=tk.HORIZONTAL, variable=var2,
    resolution=0.1, command=lambda value: print(value))
scale2.grid()

button = tk.Button(root, text='Show', command=show_values)
button.grid()

root.mainloop()