Need help with canvas widget in Tkinter please

[Ivan Van Laningham]

Hi Flounder

flounder wrote:
>
> I cannot seem to figure out how to add images to a canvas with python/Tkinter
>
> I can do it with Tcl/Tk and Perl/Tk but not with python i have tried this but
>
> it did not work at all. Here is the code i used
>
> -----------CODE--------------
>
> #!/usr/bin/python
>
> from Tkinter import *
>
> mw = Tk()
> mw.title("Map Editor")
> photo = PhotoImage(file="tile0.gif")
>
> display = Canvas(mw, width=640, height=480).pack()
>
> item = display.create_image(0, 0, anchor=NW, image=photo)
>
> image = display.addImage
> mainloop()
>
> --------------END OF CODE---------------
>
> when i run this it gives me this error
>
> -----------ERROR MESSAGE--------------
>
> Traceback (innermost last):
> File ".//test.py", line 11, in ?
> item = display.create_image(0, 0, anchor=NW, image=photo)
> AttributeError: 'None' object has no attribute 'create_image'
>
> -----------END OF ERROR---------------
>
> can anyone show me how this should be done I have looked at the
>
> documentation and can't figure it out
>
> Thanks in advance
>
> --
> Flounder
>
> --
> http://www.python.org/mailman/listinfo/python-list

#!/usr/bin/python

from Tkinter import *

mw = Tk()
mw.title("Map Editor")
photo = PhotoImage(file="tile0.gif")

display = Canvas(mw, width=640, height=480)

item = display.create_image(0, 0, anchor=NW, image=photo)

display.pack()
mainloop()

----------------------------------------------
Your main problem was calling Canvas(...).pack(), since the pack()
method returns None.

And no need to add_image(), either. create_image() does everything you
need.

<can't-add-things-to-None>-ly y'rs,
Ivan
----------------------------------------------
Ivan Van Laningham
Callware Technologies, Inc.
iva...@callware.com
iva...@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
----------------------------------------------

[flounder]

[Fredrik Lundh]

flounder <flounder...@telebot.com> wrote:
> when i run this it gives me this error
>
> -----------ERROR MESSAGE--------------
>
> Traceback (innermost last):
> File ".//test.py", line 11, in ?
> item = display.create_image(0, 0, anchor=NW, image=photo)
> AttributeError: 'None' object has no attribute 'create_image'
>
> -----------END OF ERROR---------------
>
> can anyone show me how this should be done I have looked at the
> documentation and can't figure it out

what documentation?

your problem, and how to fix it, is described here:
http://www.pythonware.com/library/tkinter/introduction/x131-more-on-widget-references.htm

</F>

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[Gerrit Holl]

flounder wrote on 946779607:

> display = Canvas(mw, width=640, height=480).pack()
>

> item = display.create_image(0, 0, anchor=NW, image=photo)

That's not a TKinter related problem. You're not creating a class instance,
as you might think. .pakc() doesn't return an instance. Try:

display = Canvas(mw, width=640, height=480)

item = display.create_image(0, 0, anchor=NW, image=photo)

...
display.pack()

regards,
Gerrit.

--
"The move was on to 'Free the Lizard'"

-- Jim Hamerly and Tom Paquin (Open Sources, 1999 O'Reilly and Associates)
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