Question

How to make a python program that imports only turtle and math library where I can click once on the screen to set the center of the square, move the mouse to define the edge-length of the square; click a second time to draw the square with the defined edge-length and center point?

Answer 1

Comment if you have any issues or changes to be made.

Code:

import turtle

def get_mouse_click_coor(x, y):

    global centerClick,centerCoordinates

    if centerClick == 0:

        centerCoordinates = (x,y)

        centerClick = 1

    else:

        edgeCoordinates = (x,y)

        centerClick = 0

        drawSquare(centerCoordinates, edgeCoordinates)

def drawSquare(center, edge):

    #calculate difference

    x = abs(center[0] - edge[0])

    y = abs(center[1] - edge[1])

    #set edge length

    if y > x:

        sideLength = y * 2

    else:

        sideLength = x * 2

    #create turtle

    square = turtle.Turtle()

    square.penup()

    #go to center coordinates

    square.goto(center)

    for i in range(2):

        square.forward(sideLength/2)

        square.right(90)

    #draw square

    square.pendown()

    for i in range(4):

        square.forward(sideLength)

        square.right(90)

#start program

wn = turtle.Screen()

# wn.bgcolor("light blue")

centerClick = 0

wn.onscreenclick(get_mouse_click_coor)

turtle.done()

Code Screenshots:

Output