def _calculate(self, a, b, t):
_calculate = self._calculate
if isinstance(a, list) or isinstance(a, tuple):
if isinstance(a, list):
tp = list
else:
tp = tuple
return tp([_calculate(a[x], b[x], t) for x in range(len(a))])
elif isinstance(a, dict):
d = {}
for x in iterkeys(a):
if x not in b:
# User requested to animate only part of the dict.
# Copy the rest
d[x] = a[x]
else:
d[x] = _calculate(a[x], b[x], t)
return d
else:
return (a * (1. - t)) + (b * t)
def _calculate(self, a, b, t):
_calculate = self._calculate
if isinstance(a, list) or isinstance(a, tuple):
if isinstance(a, list):
tp = list
else:
tp = tuple
return tp([_calculate(a[x], b[x], t) for x in range(len(a))])
elif isinstance(a, dict):
d = {}
for x in iterkeys(a):
if x not in b:
# User requested to animate only part of the dict.
# Copy the rest
d[x] = a[x]
else:
d[x] = _calculate(a[x], b[x], t)
return d
else:
return (a * (1. - t)) + (b * t)
def _apply_rule(self, widget, rule, rootrule, template_ctx=None,
ignored_consts=set()):
# widget: the current instantiated widget
# rule: the current rule
# rootrule: the current root rule (for children of a rule)
# will collect reference to all the id in children
assert(rule not in self.rulectx)
self.rulectx[rule] = rctx = {
'ids': {'root': widget.proxy_ref},
'set': [], 'hdl': []}
# extract the context of the rootrule (not rule!)
assert(rootrule in self.rulectx)
rctx = self.rulectx[rootrule]
# if a template context is passed, put it as "ctx"
if template_ctx is not None:
rctx['ids']['ctx'] = QueryDict(template_ctx)
# if we got an id, put it in the root rule for a later global usage
if rule.id:
# use only the first word as `id` discard the rest.
rule.id = rule.id.split('#', 1)[0].strip()
rctx['ids'][rule.id] = widget.proxy_ref
# set id name as a attribute for root widget so one can in python
# code simply access root_widget.id_name
_ids = dict(rctx['ids'])
_root = _ids.pop('root')
_new_ids = _root.ids
for _key in iterkeys(_ids):
if _ids[_key] == _root:
# skip on self
continue
_new_ids[_key] = _ids[_key]
_root.ids = _new_ids
# first, ensure that the widget have all the properties used in
# the rule if not, they will be created as ObjectProperty.
rule.create_missing(widget)
# build the widget canvas
if rule.canvas_before:
with widget.canvas.before:
self._build_canvas(widget.canvas.before, widget,
rule.canvas_before, rootrule)
if rule.canvas_root:
with widget.canvas:
self._build_canvas(widget.canvas, widget,
rule.canvas_root, rootrule)
if rule.canvas_after:
with widget.canvas.after:
self._build_canvas(widget.canvas.after, widget,
rule.canvas_after, rootrule)
# create children tree
Factory_get = Factory.get
Factory_is_template = Factory.is_template
for crule in rule.children:
cname = crule.name
if cname in ('canvas', 'canvas.before', 'canvas.after'):
raise ParserException(
crule.ctx, crule.line,
'Canvas instructions added in kv must '
'be declared before child widgets.')
# depending if the child rule is a template or not, we are not
# having the same approach
cls = Factory_get(cname)
if Factory_is_template(cname):
# we got a template, so extract all the properties and
# handlers, and push them in a "ctx" dictionary.
ctx = {}
idmap = copy(global_idmap)
idmap.update({'root': rctx['ids']['root']})
if 'ctx' in rctx['ids']:
idmap.update({'ctx': rctx['ids']['ctx']})
try:
for prule in crule.properties.values():
value = prule.co_value
if type(value) is CodeType:
value = eval(value, idmap)
ctx[prule.name] = value
for prule in crule.handlers:
value = eval(prule.value, idmap)
ctx[prule.name] = value
except Exception as e:
tb = sys.exc_info()[2]
raise BuilderException(
prule.ctx, prule.line,
'{}: {}'.format(e.__class__.__name__, e), cause=tb)
# create the template with an explicit ctx
child = cls(**ctx)
widget.add_widget(child)
# reference it on our root rule context
if crule.id:
rctx['ids'][crule.id] = child
else:
# we got a "normal" rule, construct it manually
# we can't construct it without __no_builder=True, because the
# previous implementation was doing the add_widget() before
# apply(), and so, we could use "self.parent".
child = cls(__no_builder=True)
widget.add_widget(child)
self.apply(child)
self._apply_rule(child, crule, rootrule)
# append the properties and handlers to our final resolution task
if rule.properties:
rctx['set'].append((widget.proxy_ref,
list(rule.properties.values())))
for key, crule in rule.properties.items():
# clear previously applied rules if asked
if crule.ignore_prev:
Builder.unbind_property(widget, key)
if rule.handlers:
rctx['hdl'].append((widget.proxy_ref, rule.handlers))
# if we are applying another rule that the root one, then it's done for
# us!
if rootrule is not rule:
del self.rulectx[rule]
return
# normally, we can apply a list of properties with a proper context
try:
rule = None
for widget_set, rules in reversed(rctx['set']):
for rule in rules:
assert(isinstance(rule, ParserRuleProperty))
key = rule.name
value = rule.co_value
if type(value) is CodeType:
value, bound = create_handler(
widget_set, widget_set, key, value, rule,
rctx['ids'])
# if there's a rule
if (widget_set != widget or bound or
key not in ignored_consts):
setattr(widget_set, key, value)
else:
if (widget_set != widget or
key not in ignored_consts):
setattr(widget_set, key, value)
except Exception as e:
if rule is not None:
tb = sys.exc_info()[2]
raise BuilderException(rule.ctx, rule.line,
'{}: {}'.format(e.__class__.__name__,
e), cause=tb)
raise e
# build handlers
try:
crule = None
for widget_set, rules in rctx['hdl']:
for crule in rules:
assert(isinstance(crule, ParserRuleProperty))
assert(crule.name.startswith('on_'))
key = crule.name
if not widget_set.is_event_type(key):
key = key[3:]
idmap = copy(global_idmap)
idmap.update(rctx['ids'])
idmap['self'] = widget_set.proxy_ref
if not widget_set.fbind(key, custom_callback, crule,
idmap):
raise AttributeError(key)
# hack for on_parent
if crule.name == 'on_parent':
Factory.Widget.parent.dispatch(widget_set.__self__)
except Exception as e:
if crule is not None:
tb = sys.exc_info()[2]
raise BuilderException(
crule.ctx, crule.line,
'{}: {}'.format(e.__class__.__name__, e), cause=tb)
raise e
# rule finished, forget it
del self.rulectx[rootrule]
def _apply_rule(self,
widget,
rule,
rootrule,
template_ctx=None,
ignored_consts=set()):
# widget: the current instantiated widget
# rule: the current rule
# rootrule: the current root rule (for children of a rule)
# will collect reference to all the id in children
assert (rule not in self.rulectx)
self.rulectx[rule] = rctx = {
'ids': {
'root': widget.proxy_ref
},
'set': [],
'hdl': []
}
# extract the context of the rootrule (not rule!)
assert (rootrule in self.rulectx)
rctx = self.rulectx[rootrule]
# if a template context is passed, put it as "ctx"
if template_ctx is not None:
rctx['ids']['ctx'] = QueryDict(template_ctx)
# if we got an id, put it in the root rule for a later global usage
if rule.id:
# use only the first word as `id` discard the rest.
rule.id = rule.id.split('#', 1)[0].strip()
rctx['ids'][rule.id] = widget.proxy_ref
# set id name as a attribute for root widget so one can in python
# code simply access root_widget.id_name
_ids = dict(rctx['ids'])
_root = _ids.pop('root')
_new_ids = _root.ids
for _key in iterkeys(_ids):
if _ids[_key] == _root:
# skip on self
continue
_new_ids[_key] = _ids[_key]
_root.ids = _new_ids
# first, ensure that the widget have all the properties used in
# the rule if not, they will be created as ObjectProperty.
rule.create_missing(widget)
# build the widget canvas
if rule.canvas_before:
with widget.canvas.before:
self._build_canvas(widget.canvas.before, widget,
rule.canvas_before, rootrule)
if rule.canvas_root:
with widget.canvas:
self._build_canvas(widget.canvas, widget, rule.canvas_root,
rootrule)
if rule.canvas_after:
with widget.canvas.after:
self._build_canvas(widget.canvas.after, widget,
rule.canvas_after, rootrule)
# create children tree
Factory_get = Factory.get
Factory_is_template = Factory.is_template
for crule in rule.children:
cname = crule.name
if cname in ('canvas', 'canvas.before', 'canvas.after'):
raise ParserException(
crule.ctx, crule.line,
'Canvas instructions added in kv must '
'be declared before child widgets.')
# depending if the child rule is a template or not, we are not
# having the same approach
cls = Factory_get(cname)
if Factory_is_template(cname):
# we got a template, so extract all the properties and
# handlers, and push them in a "ctx" dictionary.
ctx = {}
idmap = copy(global_idmap)
idmap.update({'root': rctx['ids']['root']})
if 'ctx' in rctx['ids']:
idmap.update({'ctx': rctx['ids']['ctx']})
try:
for prule in crule.properties.values():
value = prule.co_value
if type(value) is CodeType:
value = eval(value, idmap)
ctx[prule.name] = value
for prule in crule.handlers:
value = eval(prule.value, idmap)
ctx[prule.name] = value
except Exception as e:
tb = sys.exc_info()[2]
raise BuilderException(prule.ctx,
prule.line,
'{}: {}'.format(
e.__class__.__name__, e),
cause=tb)
# create the template with an explicit ctx
child = cls(**ctx)
widget.add_widget(child)
# reference it on our root rule context
if crule.id:
rctx['ids'][crule.id] = child
else:
# we got a "normal" rule, construct it manually
# we can't construct it without __no_builder=True, because the
# previous implementation was doing the add_widget() before
# apply(), and so, we could use "self.parent".
child = cls(__no_builder=True)
widget.add_widget(child)
self.apply(child)
self._apply_rule(child, crule, rootrule)
# append the properties and handlers to our final resolution task
if rule.properties:
rctx['set'].append(
(widget.proxy_ref, list(rule.properties.values())))
for key, crule in rule.properties.items():
# clear previously applied rules if asked
if crule.ignore_prev:
Builder.unbind_property(widget, key)
if rule.handlers:
rctx['hdl'].append((widget.proxy_ref, rule.handlers))
# if we are applying another rule that the root one, then it's done for
# us!
if rootrule is not rule:
del self.rulectx[rule]
return
# normally, we can apply a list of properties with a proper context
try:
rule = None
for widget_set, rules in reversed(rctx['set']):
for rule in rules:
assert (isinstance(rule, ParserRuleProperty))
key = rule.name
value = rule.co_value
if type(value) is CodeType:
value, bound = create_handler(widget_set, widget_set,
key, value, rule,
rctx['ids'])
# if there's a rule
if (widget_set != widget or bound
or key not in ignored_consts):
setattr(widget_set, key, value)
else:
if (widget_set != widget or key not in ignored_consts):
setattr(widget_set, key, value)
except Exception as e:
if rule is not None:
tb = sys.exc_info()[2]
raise BuilderException(rule.ctx,
rule.line,
'{}: {}'.format(e.__class__.__name__,
e),
cause=tb)
raise e
# build handlers
try:
crule = None
for widget_set, rules in rctx['hdl']:
for crule in rules:
assert (isinstance(crule, ParserRuleProperty))
assert (crule.name.startswith('on_'))
key = crule.name
if not widget_set.is_event_type(key):
key = key[3:]
idmap = copy(global_idmap)
idmap.update(rctx['ids'])
idmap['self'] = widget_set.proxy_ref
if not widget_set.fbind(key, custom_callback, crule,
idmap):
raise AttributeError(key)
#hack for on_parent
if crule.name == 'on_parent':
Factory.Widget.parent.dispatch(widget_set.__self__)
except Exception as e:
if crule is not None:
tb = sys.exc_info()[2]
raise BuilderException(crule.ctx,
crule.line,
'{}: {}'.format(e.__class__.__name__,
e),
cause=tb)
raise e
# rule finished, forget it
del self.rulectx[rootrule]
