So, I wrote a function that will create a hierarchy of nodes with a list
of given headlines. Here's the code, along with a test script:
=====
@language python
def create_node_hierarchy(heads, parent=None, forcecreate=False):
''' create the proper hierarchy of nodes with headlines defined in
'head' under 'parent' if they do not exist
params:
parent - parent node to start from. Set to None for top-level nodes
heads - list of headlines in order to create, i.e.
['foo','bar','baz']
will create:
parent
-foo
--bar
---baz
forcecreate - If False (default), will not create nodes unless
they don't exist
If True, will create nodes regardless of existing nodes
returns the final position ('baz' in the above example)
'''
for head in heads:
if parent == None and head == heads[0]: # if parent = None, create
top level node for first head
if not forcecreate:
for pos in c.all_positions():
if pos.h == head:
parent = pos
break
if parent is None or forcecreate:
n = c.rootPosition().insertAfter()
n.h = head
parent = n
else: # else, simply create child nodes each round
if not forcecreate:
for ch in parent.children():
if ch.h == head:
parent = ch
break
if parent.h != head or forcecreate:
n = parent.insertAsLastChild()
n.h = head
parent = n
return parent # actually the last created/found position
### test script
h = ['test1', 'test2', 'test3']
#pos = create_node_hierarchy(h, parent=p, forcecreate=False) #creates
nodes under current node, but traces if they already exist
pos = create_node_hierarchy(h, forcecreate=True) # creates NEW nodes
starting with top level, regardless of if similar nodes exist
g.es(pos.h)
c.selectPosition(pos)
c.redraw_now()
=====
With the proper undo code added, I think that it would be right at home
as c.create_node_hierarchy (or perhaps c.create_headline_hierarchy?).
p.create_node_hierarchy would be a wrapper setting parent to self:
=====
### definition for p.create_node_hierarchy
def create_node_hierarchy(self, heads, forcecreate=False):
c.create_node_hierarchy(heads, parent=self, forcecreate=forcecreate)
=====
I would find this immensely useful in the API. Currently I have to
redefine it in each outline I want to use it in.
I'd add it myself, but I don't understand the undo code for the life of
me...
-->Jake
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