samples/experimental/linting_tool/lib/widgets/lint_expansion_tile.dart

// Copyright 2021 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:linting_tool/model/rule.dart';
import 'package:linting_tool/theme/app_theme.dart';
import 'package:linting_tool/theme/colors.dart';

class LintExpansionTile extends StatefulWidget {
  final Rule rule;
  const LintExpansionTile({
    required this.rule,
    Key? key,
  }) : super(key: key);

  @override
  _LintExpansionTileState createState() => _LintExpansionTileState();
}

class _LintExpansionTileState extends State<LintExpansionTile> {
  var isExpanded = false;
  @override
  Widget build(BuildContext context) {
    var theme = Theme.of(context);
    var textTheme = theme.textTheme;
    final rule = widget.rule;
    final incompatibleString =
        rule.incompatible.isNotEmpty ? rule.incompatible.join(', ') : 'none';
    final setsString = rule.sets.isNotEmpty ? rule.sets.join(', ') : 'none';
    return ExpansionTile(
      collapsedBackgroundColor: AppColors.white50,
      title: Text(
        rule.name,
        style: textTheme.subtitle1!.copyWith(
          fontWeight: FontWeight.w700,
        ),
      ),
      subtitle: Text(
        rule.description,
        style: textTheme.caption!,
      ),
      initiallyExpanded: isExpanded,
      onExpansionChanged: (value) {
        setState(() {
          isExpanded = value;
        });
      },
      expandedAlignment: Alignment.centerLeft,
      childrenPadding: const EdgeInsets.symmetric(
        horizontal: 16.0,
        vertical: 8.0,
      ),
      backgroundColor: AppColors.white50,
      maintainState: true,
      expandedCrossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text.rich(
          TextSpan(
            children: [
              TextSpan(
                text: 'Group:',
                style: textTheme.subtitle2,
              ),
              TextSpan(
                text: ' ${rule.group}',
              ),
            ],
          ),
          textAlign: TextAlign.left,
        ),
        Text.rich(
          TextSpan(
            children: [
              TextSpan(
                text: 'Maturity:',
                style: textTheme.subtitle2,
              ),
              TextSpan(
                text: ' ${rule.maturity}',
              ),
            ],
          ),
          textAlign: TextAlign.left,
        ),
        Text.rich(
          TextSpan(
            children: [
              TextSpan(
                text: 'Incompatible:',
                style: textTheme.subtitle2,
              ),
              TextSpan(
                text: ' $incompatibleString',
              ),
            ],
          ),
          textAlign: TextAlign.left,
        ),
        Text.rich(
          TextSpan(
            children: [
              TextSpan(
                text: 'Sets:',
                style: textTheme.subtitle2,
              ),
              TextSpan(
                text: ' $setsString',
              ),
            ],
          ),
          textAlign: TextAlign.left,
        ),
        const SizedBox(
          height: 16.0,
        ),
        MarkdownBody(
          data: rule.details,
          selectable: true,
          styleSheet: AppTheme.buildMarkDownTheme(theme),
        ),
        const SizedBox(
          height: 8.0,
        ),
        Align(
          alignment: Alignment.centerRight,
          child: ElevatedButton(
            child: const Text('Add to profile'),
            onPressed: () {
              // TODO(abd99): Iplement adding to a profile.
            },
          ),
        ),
        const SizedBox(
          height: 16.0,
        ),
      ],
    );
  }
}