def route(self, ast):
"""
Route all lines defined in piUML diagram.
:Parameters:
ast
Diagram start node.
"""
ncache = {}
lcache = {}
router = arouter.Router()
nodes = (n for n in unwind(ast)
if isinstance(n, Element)
and not isinstance(n, Relationship))
for n in nodes:
x, y = n.style.pos
w, h = n.style.size
shape = (x, y), (x + w, y + h)
s = router.add(shape)
ncache[n.id] = s
lines = (l for l in ast if isinstance(l, Relationship))
for l in lines:
h = ncache[l.head.id]
t = ncache[l.tail.id]
c = router.connect(h, t)
lcache[l] = c
router.route()
for l, c in list(lcache.items()):
l.style.edges = tuple(Pos(*p) for p in reversed(router.edges(c)))
def test_unwind(self):
"""
Test unwind
"""
n1 = Diagram()
n1.id = 'n1'
n2 = PackagingElement('a', id='n2')
n3 = PackagingElement('a', id='n3')
n4 = Element('a', id='n4')
n1.children.extend((n2, n3))
n2.children.append(n4)
n2.parent = n1
n3.parent = n1
n4.parent = n2
self.assertEquals([n1, n2, n4, n3], list(unwind(n1)))
def find_node(ast, id):
for n in unwind(ast):
if hasattr(n, 'id') and n.id == id:
return n
raise ValueError('Cannot find node {}'.format(id))