def do_set_expr(self, expr):
# find dependencies and error-check expression
#try:
data = asarray(self.worksheet.evaluate(expr))
# except Exception, ar:
# x. print >>sys.stderr, '*****************', ar
# raise UserWarning, False
self.depdict = self.analyze_expression(expr)
newdep = set(self.depdict.values())
# set dependencies
for column in newdep - self.dependencies:
print >>sys.stderr, "add", column.name
dispatcher.connect(self.calculate, signal='data-changed', sender=column)
dispatcher.connect(self.on_dep_rename, signal='rename', sender=column)
for column in self.dependencies - newdep:
print >>sys.stderr, "rem", column.name
dispatcher.disconnect(self.calculate, signal='data-changed', sender=column)
dispatcher.disconnect(self.on_dep_rename, signal='rename', sender=column)
newdepws = set(d.worksheet for d in newdep)
depws = set(d.worksheet for d in self.dependencies)
for worksheet in newdepws - depws:
dispatcher.connect(self.on_dep_ws_rename, signal='fullname-changed', sender=worksheet)
dispatcher.connect(self.on_dep_ws_rename, signal='rename', sender=worksheet)
for worksheet in depws - newdepws:
dispatcher.disconnect(self.on_dep_ws_rename, signal='fullname-changed', sender=worksheet)
dispatcher.disconnect(self.on_dep_ws_rename, signal='rename', sender=worksheet)
self.dependencies = newdep
if expr != '':
# set data without triggering an action
self.data[:] = data
dispatcher.send(sender=self, signal='data-changed')
dispatcher.send(sender=self.worksheet, signal='data-changed')
return True
def receiveDrop(self, sender, signal, model):
if sender is self:
return
for observer in self.observers:
dispatcher.disconnect(observer.receivePropertyChange, signal=model)
self.models.remove(model)
def unregisterObserver(self, observer):
dispatcher.disconnect(observer.receiveDropModel, signal=Drop)
dispatcher.disconnect(observer.receiveNewModel, signal=New)
for model in self.models:
dispatcher.disconnect(observer.receivePropertyChange, signal=model)
self.observers.remove(observer)
def receiveDrop(self, sender, signal, model):
if sender is self:
return
for observer in self.observers:
dispatcher.disconnect(observer.receivePropertyChange, signal=model)
self.models.remove(model)
def unregisterObserver(self, observer):
dispatcher.disconnect(observer.receiveDropModel, signal=Drop)
dispatcher.disconnect(observer.receiveNewModel, signal=New)
for model in self.models:
dispatcher.disconnect(observer.receivePropertyChange, signal=model)
self.observers.remove(observer)
