[Pyobjc-dev] Subclassing from NibClassBuilder-generated files

[Jordan K. <jo...@kr...>]

Going through the tutorial and other examples, I'm wondering why the 
(implied) common practice is to directly edit the 
NibClassBuilder-generated python files.  Will regeneration upon changes 
in IB destroy changes to the file?

I tried creating another file for CurrencyConverter which imported 
CurrencyConverter.py's classes (which were renamed to _Converter and 
_ConverterController), subclassed them,  and attempted to call 
runEventLoop() from there, but the runtime is complaining that the 
classes already exist:

   File "Resources/t.py", line 6, in ?
     class Converter(_Converter):
objc.error: Class already exists in Objective-C runtime

Here's t.py:

*snip*
from PyObjCTools import NibClassBuilder, AppHelper

from CurrencyConverter import Converter as _Converter
from CurrencyConverter import ConverterController as 
_ConverterController

class Converter(_Converter):
         pass

class ConverterController(_ConverterController):
         pass

AppHelper.runEventLoop()
*snip*

If this is in fact a problem, how does one get around this?  Perhaps 
I'm just used to wxglade, where it exports classes to be used 
elsewhere, knowing that they will be generated often.  If it's 
something else, please let me know :)

On another documentation-related note:  the nib in the tutorial 
(step3-MainMenu.nib.zip) actually has two Convert buttons, one on top 
of the other.

J.