Answer
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Work Step by Step
# 11.45 (Tkinter: plot the square function) Exercise 5.54 draws a square function. Rewrite the
# program to draw the square function using Tkinter, as shown in Figure 11.16b.
import math
from tkinter import *
class MainGUI:
def __init__(self):
window = Tk() # Create a window
window.title("Square Function") # Set title
width = 400
height = 300
canvas = Canvas(window, width=width, height=height)
canvas.pack()
scaleFactor = 0.01
p = []
for x in range(-175, 176):
p.append([x + width / 2, -1 * scaleFactor * x * x + height -50])
for i in range(len(p) - 1):
canvas.create_line(p[i], p[i + 1])
# Draw X-axis
canvas.create_line(10, height - 50, width - 10, height - 50)
canvas.create_line(width - 10 - 10, height - 50 + 10, width - 10, height - 50)
canvas.create_line(width - 10 - 10, height - 50 - 10, width - 10, height - 50)
# Draw Y-axis
canvas.create_line(width / 2, 10, width / 2, height)
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()
