from engine.plugin import Plugin class Composite (Plugin): def __init__ (self, sons=[], *args, **kwds): Plugin.__init__ (self, *args, **kwds) self.sons=sons def insert (self, plugin): self.sons.append(plugin) def render_env (self, request): # this is designed so as to support a template like # {% for son in sons %} {{ son.rendered }} ... return { 'sons': [ { 'rendered': son.render(request), 'title': son.title(), 'uuid': son.uuid} for son in self.sons ]} # xxx need a way to select an active son, like e.g. # Composite (active='some string') # and we could then try to find that string in either title or uuid or some other place # in which case the corresponding 'son' entry in render_env above would son.active=True