mirror of https://github.com/python/cpython
61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
""""Paint program by Dave Michell.
|
|
|
|
Subject: tkinter "paint" example
|
|
From: Dave Mitchell <davem@magnet.com>
|
|
To: python-list@cwi.nl
|
|
Date: Fri, 23 Jan 1998 12:18:05 -0500 (EST)
|
|
|
|
Not too long ago (last week maybe?) someone posted a request
|
|
for an example of a paint program using Tkinter. Try as I might
|
|
I can't seem to find it in the archive, so i'll just post mine
|
|
here and hope that the person who requested it sees this!
|
|
|
|
All this does is put up a canvas and draw a smooth black line
|
|
whenever you have the mouse button down, but hopefully it will
|
|
be enough to start with.. It would be easy enough to add some
|
|
options like other shapes or colors...
|
|
|
|
yours,
|
|
dave mitchell
|
|
davem@magnet.com
|
|
"""
|
|
|
|
from Tkinter import *
|
|
|
|
"""paint.py: not exactly a paint program.. just a smooth line drawing demo."""
|
|
|
|
b1 = "up"
|
|
xold, yold = None, None
|
|
|
|
def main():
|
|
root = Tk()
|
|
drawing_area = Canvas(root)
|
|
drawing_area.pack()
|
|
drawing_area.bind("<Motion>", motion)
|
|
drawing_area.bind("<ButtonPress-1>", b1down)
|
|
drawing_area.bind("<ButtonRelease-1>", b1up)
|
|
root.mainloop()
|
|
|
|
def b1down(event):
|
|
global b1
|
|
b1 = "down" # you only want to draw when the button is down
|
|
# because "Motion" events happen -all the time-
|
|
|
|
def b1up(event):
|
|
global b1, xold, yold
|
|
b1 = "up"
|
|
xold = None # reset the line when you let go of the button
|
|
yold = None
|
|
|
|
def motion(event):
|
|
if b1 == "down":
|
|
global xold, yold
|
|
if xold != None and yold != None:
|
|
event.widget.create_line(xold,yold,event.x,event.y,smooth=TRUE)
|
|
# here's where you draw it. smooth. neat.
|
|
xold = event.x
|
|
yold = event.y
|
|
|
|
if __name__ == "__main__":
|
|
main()
|