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from json import dumps
class FormModel:
def __init__(self, identifier):
self.__identifier = identifier
self.__block = []
@property
def identifier(self):
return self.__identifier
@property
def block(self):
return self.__block
def to_json(self):
return dumps({question.identifier: question.answer.value.get_json_value() for question in self.block})
def find_question_of_widget(self, widget):
for question in self.block:
if question.widget == widget:
return question
def update_questions_on_change(self, changed_widget):
changed_question = self.find_question_of_widget(changed_widget)
if changed_question:
new_value = changed_question.widget.get_value(changed_question.answer_type)
changed_question.answer = changed_question.answer_type.get_literal_node(new_value)
for question in self.block:
result = question.evaluate_visibility_condition(self)
if result:
question.widget.show()
question.widget_label.show()
else:
question.widget.hide()
question.widget_label.hide()
if question.computed:
answer_result = str(question.evaluate_answer(self))
question.widget.setText(answer_result)
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