Code Snippet

"""
==========Task===============

"""

from tkinter import *
import random
import time

class Ball: 
    def __init__(self,canvas,color): 
        self.canvas=canvas 
        self.id=canvas.create_oval(30,30,50,50,fill=color) 
        self.canvas.move(self.id,100,200)
        starting_position=[-3,-2,-1,1,2,3] 
        random.shuffle(starting_position) 
        self.x = starting_position[0] 
        self.y = -3 
        self.canvas_height=self.canvas.winfo_height()
        self.canvas_width=self.canvas.winfo_width() 

    def draw(self): 
        self.canvas.move(self.id,self.x,self.y) 
        pos=self.canvas.coords(self.id) 
        if pos[1] <=0: 
            self.y=6
        if pos[3] >=self.canvas_height: 
            self.y=-6
        if pos[0] <=0:
            self.x=6
        if pos[2]>=self.canvas_width:
            self.x=-6

#===PONG BAT CLASS====
class Pongbat():
    def __init__(self,canvas,color): 
        self.canvas=canvas
        self.id=canvas.create_rectangle(0,0,100,10,fill=color) 
        self.canvas.move(self.id,200,300)
        self.x=0 #add the x object variable here in the __init__ function of our bat class
        self.canvas_width=self.canvas.winfo_width() #create a variable for the canvas width, as we did with the ball
        #Binding the methods/functions leftturn and rightturn below to the correct keys
        self.canvas.bind_all('',self.left_turn)
        self.canvas.bind_all('',self.right_turn)
        

    def draw(self): #add to the draw function (similar to the ball function's method)
        self.canvas.move(self.id,self.x,0) #move the bat in the direction of the x variable
        pos=self.canvas.coords(self.id)
        if pos[0]<=0: #if the left x coordinate is less than or equal to 0, then we don't want the bat to bounce, we want it to STOP
            self.x=0
        if pos[2]>=self.canvas_width: #same situation here, when the right x coordinate is greater than or equal to the width, then stop! 
            self.x=0
        

        #===ADD FUNCTIONS /METHODS FOR CHANGING DIRECTION BETWEEN LEFT AND RIGHT
        #Note: We use binding to bind these functions to the correct key (e.g. left or right) in the__init__function 
    def left_turn(self,evt):
        self.x=-10 #change this variable to increase or decrease the speed of the pong bat!

    def right_turn(self,evt):
        self.x=10
        

        
        

def main():
    tk=Tk()
    tk.title("My 21st Century Pong Game")
    tk.resizable(0,0)
    tk.wm_attributes("-topmost",1)
    canvas=Canvas(tk,bg="white",width=500,height=400,bd=0,highlightthickness=0)
    canvas.pack()
    tk.update()

    ball1=Ball(canvas,'green')
    bat1=Pongbat(canvas,'red')
    while 1:
        tk.update()
        ball1.draw()
        bat1.draw() 
        time.sleep(0.02) 
main()


#note - an ERROR may be caused as Python is complaining about breaking out of the while loop when the window is closed - you can ignore that for now (or a fix is provied in the solutions section for those who are interested"""

                    

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