[Zope-CMF] How add a new property to Factory-based Type Information?

[Grégoire Weber]

Hi all!

I'd like be able to add a new property to the 
'Factory-based Type Information' ZMI view of a content
type.

I'm able to add a property through the install script of my 
product as followed (stripped down code snippet):

<CODE file="Install.py">
    prop = {'id':'slots', 'type': 'string', 'mode':'w', 
            'label':'Available Slots'}
    # 'xxx' is the meta_type of the content type
    fti = getattr(getToolByName(self, 'portal_types'), 'xxx')
    if not fti.hasProperty(prop['id']):
        fti._properties = fti._properties + (prop,)
        fti.manage_changeProperties( {prop['id']: 'foobar'} )
</CODE>

As said above: This works in 'Install.py' in the 'Extensions' 
folder.

What I am searching for is a hook where I can add the additional
properties at the moment somebody adds a new portal type by 
'Factory-based Type Information' in the portal_types tool.

I'd like to use 'Factory-based Type Information' of a content 
type to differently configure cloned content types.

I took a look into the code TypesTool and I found out that there 
could be such a hook in 'listDefaultTypeInformation': 

   package = getattr(Products, product.getId(), None)
   dispatcher = getattr(package, '__FactoryDispatcher__', None)
   ftis = getattr(dispatcher, 'factory_type_information', None)

How can I use 'dispatcher' and '__FactoryDispatcher__'.

Or am I on the wrong path?

Greetings, Greg

P.S.: Zope 2.5.1/CMF1.3 on Win2k
_____________________________________
Grégoire Weber
mailto:gregoire.weber@switzerland.org