~ OOP,Classes,Python,Tkinter ...recreating PONG


Step 8: Create a Bat Class

Code and Challenge

Copy and paste the code below. Run it! Read the task and see if you can do it before moving on to the next challenge


"""
==========Task===============
Experiement with adding additional classes, just so you know you can!
"""

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

#===CREATE A PONGBAT CLASS ===========
class Pongbat():
    def __init__(self,canvas,color): #called with the parameters self, canvas and color
        self.canvas=canvas
        self.id=canvas.create_rectangle(0,0,100,10,fill=color) #this creates the rectangle that will be the bat
        self.canvas.move(self.id,200,300) #initial 'movement' specified here

    def draw(self): #the paddle's draw function - nothing in here at the moment
        pass
        

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') #create an instance of the Pongbat class, called bat 1 = make the bat a brilliant red!
    while 1:
        tk.update()
        ball1.draw()
        bat1.draw() #call the bat's draw function 
        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"""



Code your solution here

Systems Life Cycle (in a nutshell): Analyse - Design - Create - Test - Evaluate. Designing something or writing out some pseudocode before you actually write code is always a good idea! Get in to the habit of doing so! You can draw your flowchart here and screenshot it.

A sample flow chart (design) for this particular challenge could look like:

Flowchart: Python program to get the Fibonacci series between 0 to 50
Each challenge section below provides an online drawing tool where you can dynamically create flowcharts. Screenshot them into your presentation for submission.

Solutions & Answers

Answers /Solutions in the "members area" drive under: "Solve and Learn >>SOLUTIONS"

Testing Table

You may want to read a little about Testing first. A teacher may go through some examples with you. Feel free to fill in the test table here, and screenshot it in to your powerpoint. Testing is absolutely essential once you have created a program!
Test No. Description Test Data(input) Expected Outcome Actual Outcome Further Action?
1
2
3
4
5
Coming soon!