Python Game Programming By Example

Basic game objects

Before we start drawing all our game items, let's define a base class with the functionality that they will have in common—storing a reference to the canvas and its underlying canvas item, getting information about its position, and deleting the item from the canvas:

class GameObject(object):
    def __init__(self, canvas, item):
        self.canvas = canvas
        self.item = item

    def get_position(self):
        return self.canvas.coords(self.item)

    def move(self, x, y):
        self.canvas.move(self.item, x, y)

    def delete(self):
        self.canvas.delete(self.item)

Assuming that we have created a Canvas widget as shown in our previous code samples, a basic usage of this class and its attributes would be like this:

item = canvas.create_rectangle(10,10,100,80, fill='green') ...