Tkinter "scrollregion" verbosity
Greg McFarlane
gregm at iname.com
Mon Sep 20 01:00:17 EDT 1999
This is a feature of Tkinter - everything returned by cget (and
configure) is a string. Consider:
>>> canvas = Tkinter.Canvas()
>>> print type(canvas.cget('width')) # width should be int, right?
<type 'string'>
Years ago, this annoyed me so much that I rewrote Tkinter to return
the "correct" type for all Tk widget options. The problem with this
is that Tkinter then needs to contain a mapping from all option names
to return type. Maintaining this list across versions of Tk (and Blt
and Tix and ...) would become a nightmare, so "always a string" is
probably as good as you'll get :)
On 18 Sep, Randall Hopper wrote:
> Is there a simpler way to get the canvas scroll region than this?
>
> GETTING THE CANVAS SCROLL REGION:
>
> region = canvas.cget( 'scrollregion' )
> if not region:
> raise AttributeError, "No scroll region defined for the canvas"
>
> region = map( string.atof, string.split( region ) )
>
>
> With Python's normal brevity, it surprised me that this much code was needed.
--
Greg McFarlane INMS Telstra Australia gregm at iname.com
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