tkinter example scale (snippet)

Python tkinter (gui) example 'scale'

Functions in program:

• def print_selection(v):

Modules used in program:

• import tkinter as tk

scale

Python tkinter example: scale

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import tkinter as tk


'''
显示一个拖动栏, 并将位置实时打印到 label 上.
'''

window = tk.Tk()
window.title('My Window')
window.geometry('200x200')

def print_selection(v):
    lbl.config(text='you have reached ' + v)

lbl = tk.Label(
        window,
        bg='yellow',
        width=20,
        text='empty'
    )

# 创建一个 Scale 拖动滚条对象. 其中参数 from_(为
# 避免与关键字 from 重名), to 表示滚动条的最小最大
# 值; 而 orient 指示滚条的方向; length 指示长度,
# 且以像素为单位; resolution 分辨率我理解是用来表示
# 小数位的; 而 showvalue=1 在条目上方时显示值.
s = tk.Scale(
        window,
        label='            drag me along',
        from_ = 5,
        to = 11,
        orient=tk.HORIZONTAL,
        length=200,
        showvalue=0,
        tickinterval=2,
        resolution=0.01,
        command=print_selection
    )

lbl.pack()
s.pack()

window.mainloop()

Useful links

• Learn Tkinter: https://pythonbasics.org/tkinter/
• Wikipedia tkinter: https://en.wikipedia.org/wiki/Tkinter