def getCategoryWithIndex(self, index):
children = self.__categories.rootItems()
for i in index:
category = children[i]
children = [child for child in category.children() \
if child in self.__categories]
return category
def getChildrenCount(self, index): # FIXME: duplication with viewers
if index == ():
return len(self.__categories.rootItems())
else:
category = self.getCategoryWithIndex(index)
return len(category.children())
