Create double_answer_view (QuickBirdEng#66)

Author: massimomartinelli

lib/src/views/double_answer_view.dart

@@ -0,0 +1,92 @@
+import 'package:flutter/material.dart';
+import 'package:survey_kit/src/answer_format/double_answer_format.dart';
+import 'package:survey_kit/src/views/decoration/input_decoration.dart';
+import 'package:survey_kit/src/result/question/double_question_result.dart';
+import 'package:survey_kit/src/steps/predefined_steps/question_step.dart';
+import 'package:survey_kit/src/views/widget/step_view.dart';
+
+class DoubleAnswerView extends StatefulWidget {
+ final QuestionStep questionStep;
+ final DoubleQuestionResult? result;
+
+ const DoubleAnswerView({
+ Key? key,
+ required this.questionStep,
+ required this.result,
+ }) : super(key: key);
+
+ @override
+ _DoubleAnswerViewState createState() => _DoubleAnswerViewState();
+}
+
+class _DoubleAnswerViewState extends State<DoubleAnswerView> {
+ late final DoubleAnswerFormat _doubleAnswerFormat;
+ late final TextEditingController _controller;
+ late final DateTime _startDate;
+
+ bool _isValid = false;
+
+ @override
+ void initState() {
+ super.initState();
+ _doubleAnswerFormat =
+ widget.questionStep.answerFormat as DoubleAnswerFormat;
+ _controller = TextEditingController();
+ _controller.text = widget.result?.result?.toString() ?? '';
+ _checkValidation(_controller.text);
+ _startDate = DateTime.now();
+ }
+
+ @override
+ void dispose() {
+ _controller.dispose();
+ super.dispose();
+ }
+
+ void _checkValidation(String text) {
+ setState(() {
+ _isValid = text.isNotEmpty && double.tryParse(text) != null;
+ });
+ }
+
+ @override
+ Widget build(BuildContext context) {
+ return StepView(
+ step: widget.questionStep,
+ resultFunction: () => DoubleQuestionResult(
+ id: widget.questionStep.stepIdentifier,
+ startDate: _startDate,
+ endDate: DateTime.now(),
+ valueIdentifier: _controller.text,
+ result: double.tryParse(_controller.text) ??
+ _doubleAnswerFormat.defaultValue ??
+ null,
+ ),
+ isValid: _isValid || widget.questionStep.isOptional,
+ title: widget.questionStep.title.isNotEmpty
+ ? Text(
+ widget.questionStep.title,
+ style: Theme.of(context).textTheme.headline2,
+ textAlign: TextAlign.center,
+ )
+ : widget.questionStep.content,
+ child: Padding(
+ padding: const EdgeInsets.symmetric(vertical: 32.0),
+ child: Container(
+ width: MediaQuery.of(context).size.width,
+ child: TextField(
+ decoration: textFieldInputDecoration(
+ hint: _doubleAnswerFormat.hint,
+ ),
+ controller: _controller,
+ onChanged: (String value) {
+ _checkValidation(value);
+ },
+ keyboardType: TextInputType.number,
+ textAlign: TextAlign.center,
+ ),
+ ),
+ ),
+ );
+ }
+}