[Pyobjc-dev] How to do it? Possible or not..

[<dzi...@al...>]

Hi!

Could somebody help me to solve this problem or explain why it's =20
impossible in Cocoa/pyObjC?
Please....

Here is a pure python:

class SimpleValue:
	def __init__(self):
		self.type =3D 0
		self.value =3D 0
		self.source =3D None
=09
	def __call__(self):
		if self.type =3D=3D 0:
			return self.value
		elif self.type =3D=3D 1:
			return self.source()    #here is a trick: if =
type of my variable =20
is 1, __call__ will return source method result :-)
		else: print "Type %s is not supported, ERROR"
		=09
a =3D SimpleValue()
a.value =3D 777

b =3D SimpleValue()
b.type =3D 1
b.source =3D a

tab =3D [a, b]

print "a.type =3D %s, b.type =3D %s" % (tab[0].type, tab[1].type)
print "a.value =3D %s, b.value =3D %s" % (tab[0].value, tab[1].value)
print "a.source =3D %s, b.source =3D %s"% (tab[0].source, tab[1].source)
print "a() =3D %s, b() =3D %s" % (tab[0](), tab[1]())

The result is nice:
a.type =3D 0, b.type =3D 1
a.value =3D 777, b.value =3D 0
a.source =3D None, b.source =3D <__main__.Value instance at 0x16ed9af8>
a() =3D 777, b() =3D 777

I'm trying to do the same thing in XCode Cocoa application. So I made =20=

two classes:
First one is almost same as above:

class SimpleValue (NSObject):

     type =3D ivar(u'type')
     value =3D ivar(u'value')
     source =3D ivar(u'source')

     def __call__(self):
         if self.type =3D=3D 0:
             return self.value
         elif self.type =3D=3D 1:
             return self.source()
      	else: print "Type %s is not supported, ERROR"

Second just class to preview results in window...

class TestView(NibClassBuilder.AutoBaseClass):

     elements =3D ivar(u'elements')

     def awakeFromNib(self):
         a =3D SimpleValue.alloc().init()
         a.value =3D 777
         a.type =3D 0

         b =3D SimpleValue.alloc().init()
         b.type =3D 1
         b.source =3D a

# !!!!!!   here application exploding....Why!!! !!!!!!!!!!!!#

         self.elements =3D [a, b]

         #elementsController is defined in NIB
         self.elementsController.setContent_(self.elements)
	# if b.source is changed to "tralala" or 6,  nice tab shows a =
and b

Python 2.4 MacOSX 10.4..

best 4 all
=C5=81ukasz




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