55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
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#!/usr/bin/env python3
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""" turtle-example-suite:
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tdemo_paint.py
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A simple event-driven paint program
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- left mouse button moves turtle
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- middle mouse button changes color
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- right mouse button toogles betweem pen up
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(no line drawn when the turtle moves) and
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pen down (line is drawn). If pen up follows
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at least two pen-down moves, the polygon that
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includes the starting point is filled.
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-------------------------------------------
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Play around by clicking into the canvas
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using all three mouse buttons.
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-------------------------------------------
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To exit press STOP button
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-------------------------------------------
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"""
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from turtle import *
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def switchupdown(x=0, y=0):
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if pen()["pendown"]:
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end_fill()
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up()
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else:
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down()
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begin_fill()
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def changecolor(x=0, y=0):
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global colors
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colors = colors[1:]+colors[:1]
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color(colors[0])
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def main():
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global colors
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shape("circle")
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resizemode("user")
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shapesize(.5)
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width(3)
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colors=["red", "green", "blue", "yellow"]
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color(colors[0])
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switchupdown()
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onscreenclick(goto,1)
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onscreenclick(changecolor,2)
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onscreenclick(switchupdown,3)
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return "EVENTLOOP"
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if __name__ == "__main__":
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msg = main()
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print(msg)
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mainloop()
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