class Layout(object):
def __init__(self):
self.solver = Solver()
def update(self, element):
self.solver.autosolve = False
for constraint in element.constraints[1]:
self.solver.remove_constraint(constraint)
for constraint in element.constraints[0]:
self.solver.add_constraint(constraint)
element.constraints = [], element.constraints[0]
self.solver.autosolve = True
class Layout(object):
def __init__(self):
self.solver = Solver()
self.introns = WeakValueDictionary()
def update(self, element):
self.solver.autosolve = False
for constraint in element.constraints[1]:
self.solver.remove_constraint(constraint)
for constraint in element.constraints[0]:
self.solver.add_constraint(constraint)
element.constraints = [], element.constraints[0]
self.solver.autosolve = True
def add_intron(self, source, intron):
self.introns[source] = intron
def pop_intron(self, source):
return self.introns.pop(source)
def get_intron(self, source, otherwise=None):
return self.introns.get(source, otherwise)
class engine(object):
def __init__(self):
self.solver = Solver()
self.solver.autosolve = True
def require(self, rule):
self.solver.add_constraint(rule)
def prefer(self, rule):
rule.strength = strong
self.solver.add_constraint(rule)
def guide(self, rule):
rule.strength = weak
self.solver.add_constraint(rule)
