| 1 | from Tkinter import *
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| 2 |
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| 3 | import string
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| 4 |
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| 5 |
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| 6 | class Pong(Frame):
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| 7 | def createWidgets(self):
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| 8 | self.QUIT = Button(self, text='QUIT', foreground='red',
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| 9 | command=self.quit)
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| 10 | self.QUIT.pack(side=LEFT, fill=BOTH)
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| 11 |
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| 12 | ## The playing field
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| 13 | self.draw = Canvas(self, width="5i", height="5i")
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| 14 |
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| 15 | ## The speed control for the ball
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| 16 | self.speed = Scale(self, orient=HORIZONTAL, label="ball speed",
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| 17 | from_=-100, to=100)
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| 18 |
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| 19 | self.speed.pack(side=BOTTOM, fill=X)
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| 20 |
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| 21 | # The ball
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| 22 | self.ball = self.draw.create_oval("0i", "0i", "0.10i", "0.10i",
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| 23 | fill="red")
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| 24 | self.x = 0.05
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| 25 | self.y = 0.05
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| 26 | self.velocity_x = 0.3
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| 27 | self.velocity_y = 0.5
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| 28 |
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| 29 | self.draw.pack(side=LEFT)
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| 30 |
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| 31 | def moveBall(self, *args):
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| 32 | if (self.x > 5.0) or (self.x < 0.0):
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| 33 | self.velocity_x = -1.0 * self.velocity_x
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| 34 | if (self.y > 5.0) or (self.y < 0.0):
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| 35 | self.velocity_y = -1.0 * self.velocity_y
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| 36 |
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| 37 | deltax = (self.velocity_x * self.speed.get() / 100.0)
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| 38 | deltay = (self.velocity_y * self.speed.get() / 100.0)
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| 39 | self.x = self.x + deltax
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| 40 | self.y = self.y + deltay
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| 41 |
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| 42 | self.draw.move(self.ball, "%ri" % deltax, "%ri" % deltay)
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| 43 | self.after(10, self.moveBall)
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| 44 |
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| 45 | def __init__(self, master=None):
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| 46 | Frame.__init__(self, master)
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| 47 | Pack.config(self)
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| 48 | self.createWidgets()
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| 49 | self.after(10, self.moveBall)
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| 50 |
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| 51 |
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| 52 | game = Pong()
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| 53 |
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| 54 | game.mainloop()
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