| 1 | n/a | #!/usr/bin/env python3 |
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| 2 | n/a | """ turtle-example-suite: |
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| 3 | n/a | |
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| 4 | n/a | tdemo_paint.py |
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| 5 | n/a | |
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| 6 | n/a | A simple event-driven paint program |
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| 7 | n/a | |
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| 8 | n/a | - left mouse button moves turtle |
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| 9 | n/a | - middle mouse button changes color |
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| 10 | n/a | - right mouse button toogles betweem pen up |
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| 11 | n/a | (no line drawn when the turtle moves) and |
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| 12 | n/a | pen down (line is drawn). If pen up follows |
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| 13 | n/a | at least two pen-down moves, the polygon that |
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| 14 | n/a | includes the starting point is filled. |
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| 15 | n/a | ------------------------------------------- |
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| 16 | n/a | Play around by clicking into the canvas |
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| 17 | n/a | using all three mouse buttons. |
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| 18 | n/a | ------------------------------------------- |
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| 19 | n/a | To exit press STOP button |
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| 20 | n/a | ------------------------------------------- |
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| 21 | n/a | """ |
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| 22 | n/a | from turtle import * |
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| 23 | n/a | |
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| 24 | n/a | def switchupdown(x=0, y=0): |
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| 25 | n/a | if pen()["pendown"]: |
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| 26 | n/a | end_fill() |
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| 27 | n/a | up() |
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| 28 | n/a | else: |
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| 29 | n/a | down() |
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| 30 | n/a | begin_fill() |
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| 31 | n/a | |
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| 32 | n/a | def changecolor(x=0, y=0): |
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| 33 | n/a | global colors |
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| 34 | n/a | colors = colors[1:]+colors[:1] |
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| 35 | n/a | color(colors[0]) |
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| 36 | n/a | |
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| 37 | n/a | def main(): |
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| 38 | n/a | global colors |
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| 39 | n/a | shape("circle") |
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| 40 | n/a | resizemode("user") |
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| 41 | n/a | shapesize(.5) |
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| 42 | n/a | width(3) |
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| 43 | n/a | colors=["red", "green", "blue", "yellow"] |
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| 44 | n/a | color(colors[0]) |
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| 45 | n/a | switchupdown() |
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| 46 | n/a | onscreenclick(goto,1) |
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| 47 | n/a | onscreenclick(changecolor,2) |
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| 48 | n/a | onscreenclick(switchupdown,3) |
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| 49 | n/a | return "EVENTLOOP" |
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| 50 | n/a | |
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| 51 | n/a | if __name__ == "__main__": |
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| 52 | n/a | msg = main() |
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| 53 | n/a | print(msg) |
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| 54 | n/a | mainloop() |
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