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# 11.43 (Tkinter: plot the sine and cosine functions) Exercise 5.53 draws sine and cosine
# functions using Turtle. Rewrite the program to draw the sine and cosine functions
# using Tkinter, as shown in Figure 11.15b.
import math
from tkinter import *
class MainGUI:
def __init__(self):
window = Tk() # Create a window
window.title("Sine Function") # Set title
width = 400
height = 150
canvas = Canvas(window, width=width, height=height)
canvas.pack()
# Draw sine function
p = []
for x in range(-175, 176):
p.append([x + width / 2, -50 * math.sin((x / 100.0) * 2 * math.pi) + height / 2])
for i in range(len(p) - 1):
canvas.create_line(p[i], p[i + 1])
p = []
for x in range(-175, 176):
p.append([x + width / 2, 50 * math.sin((x / 100.0) * 2 * math.pi) + height / 2])
for i in range(len(p) - 1):
canvas.create_line(p[i], p[i + 1], fill='blue')
# Draw X-axis
canvas.create_line(10, height / 2, width - 10, height / 2)
canvas.create_text(width / 2 + 100, height / 2 + 10, text="2\u03c0")
canvas.create_text(width / 2 - 100, height / 2 + 10, text="-2\u03c0")
canvas.create_line(width - 10 - 10, height / 2 + 10, width - 10, height / 2)
canvas.create_line(width - 10 - 10, height / 2 - 10, width - 10, height / 2)
# Draw Y-axis
canvas.create_line(width / 2, 10, width / 2, height - 10)
canvas.create_line(width / 2, 10, width / 2 - 10, 10 + 10)
canvas.create_line(width / 2, 10, width / 2 + 10, 10 + 10)
window.mainloop() # Create an event loop
MainGUI()
