From 25f1722dd765826dc020d5e6ff6b89b0edaedbfd Mon Sep 17 00:00:00 2001 From: Guido van Rossum Date: Mon, 26 Jan 1998 16:47:30 +0000 Subject: [PATCH] Paint demo by Dave Mitchell. There's clearly a demand for such a demo, so here it is. --- Demo/tkinter/guido/paint.py | 60 +++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Demo/tkinter/guido/paint.py diff --git a/Demo/tkinter/guido/paint.py b/Demo/tkinter/guido/paint.py new file mode 100644 index 00000000000..743d500d2b1 --- /dev/null +++ b/Demo/tkinter/guido/paint.py @@ -0,0 +1,60 @@ +""""Paint program by Dave Michell. + +Subject: tkinter "paint" example +From: Dave Mitchell +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) + drawing_area.bind("", b1down) + drawing_area.bind("", 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()