Defining ‘all-purpose’ macros

To define an ‘all-purpose’ macro, i.e. a macro, that can render objects of (nearly) any type and thus be accessed from any other page template, just set a very general context for your macro view:

 from zope.interface import Interface
 import grok

 class Master(grok.View):
     grok.context(Interface)

and reference the macros of the associated pagetemplate like this:

context/@@master/macros/<macro-name>

Because the macros in Master now are ‘bound’ (in fact their view is bound) to Interface and every Grok application, model or container implements some interface, the Master macros will be accessible from nearly every other context. Master promises to be a view for every object, which implements Interface.