tkinter example canvas (snippet)

Python tkinter (gui) example 'canvas'

Functions in program:

• def moveIt():

Modules used in program:

• import tkinter as tk

canvas

Python tkinter example: canvas

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


'''
显示画布, Canvas 可以用来画直线, 圆等.
'''

window = tk.Tk()
window.geometry('200x200')

# 创建一个 Canvas 对象.
canvas = tk.Canvas(
        window,
        bg='blue',
        height=100,
        width=200
    )
canvas.pack()

x0, y0, x1, y1 = 50, 50, 80, 80
line = canvas.create_line(x0-20, y0-20, x1+20, y1+20, width=5)
oval = canvas.create_oval(x0, y0, x1, y1, fill='yellow')
arc = canvas.create_arc(x0+30, y0+30, x1+30, y1+30, start=0, extent=180)
rect = canvas.create_rectangle(100+50, 30, 150+20, 30+20)

def moveIt():
    # Canvas 内置的静态方法, 将对象移动 dx > 0,
    # dy > 0 步, 即 (dx, dy).
    canvas.move(rect, 0, 2)

b = tk.Button(
        window,
        text='move',
        width=20,
        command=moveIt
    )
b.pack()

window.mainloop()

Useful links

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