Tk stuff...

[Ivan Van Laningham]

Hi All, Tobe--

Tobe Bradshaw wrote:
> 
> Folks,
> 
> I'm an intermediate Python user starting to get to grips with Tkinter..
> and I could do with some help here.. Hopefully if I just state the basic
> problem you'll not laugh too much at me...
> 
> I want to write a one window application which contains just a canvas.
> Unfortunately I've fallen at the first hurdle 'cause I can't figure out
> how you'd make it so that resizing the main window will cause the canvas
> to be appropriately resized. Currently I've got a callback on
> <Configure> which simply calls .pack() on the canvas.. this obviously
> doesn't work.
> 

import sys
from Tkinter import *
w = 400
h = 400

def die(event=0):
    sys.exit(0)

def chsize(event):
    global w,h,xp,yp,xdelta,ydelta
    w = event.width
    h = event.height

if __name__ == "__main__":
    root = Tk()
    cv = Canvas(root,width=w,height=h,borderwidth=0,
        background="#409040",
        highlightthickness=0)
    cv.bind("<Configure>", chsize)
    root.bind("<Escape>", die)
    cv.pack(expand=1,fill=BOTH)
    root.mainloop()

-----------------------
The key here is

	cv.pack(expand=1,fill=BOTH)

That tells the Pack manager to expand the Canvas in BOTH directions when
the parent (root) is resized.


> So.. bearing in mind that I know absolutely nothing about tcl (he says,
> glaring at Ousterhout.. much use *that* is to me).. but a lot about Java
> (I notice at least a few common concepts in Tk, or do I misunderstand?)
> and GUIs in general.. can anyone give me a good overview of how you'd go
> about common GUI tasks using Tkinter/show me a good place to look for
> such info/come and write my code for me
> (delete as applicable)...
> 

The only place to get info right now is at

	http://www.pythonware.com

The tutorial there is not complete, but it's a lot better than nothing. 
/F is so busy he doesn't have time to update it.  There are several
books coming out, including one by Fredrik, but none are out *now*. 
John Grayson's book looks very good to me.

I don't think you're going to get many volunteers to write your code for
you.  No one wants to deprive you of your fun.;-)
> (And sorry to be a pain, but could I request you cc: my inbox, I am
> fighting with our Tech. dept. to fix their ***ing newsfeed).
> 

<bribery-has-been-known-to-work>-ly y'rs,
Ivan
----------------------------------------------
Ivan Van Laningham
Callware Technologies, Inc.
ivanlan at callware.com
ivanlan at home.com
http://www.pauahtun.org
See also: 
http://www.foretec.com/python/workshops/1998-11/proceedings.html
Army Signal Corps:  Cu Chi, Class of '70
Author:  Teach Yourself Python in 24 Hours
----------------------------------------------