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Widget code order
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| // 1. Imports (if any) | |
| import 'package:flutter/material.dart'; | |
| // 2. Enums | |
| enum DSAppBarType { primary, secondary, tertiary } | |
| enum DSAppBarSize { xs, s, m, l } | |
| // 3. StatefulWidget class | |
| class DSAppBarWidget extends StatefulWidget { | |
| const DSAppBarWidget({ | |
| super.key, | |
| required this.type, | |
| required this.title, | |
| this.size = DSAppBarSize.s, | |
| }); | |
| final DSAppBarType type; | |
| final DSAppBarSize size; | |
| final String title; | |
| @override | |
| State<DSAppBarWidget> createState() => _DSAppBarWidgetState(); | |
| } | |
| // 4. State class | |
| class _DSAppBarWidgetState extends State<DSAppBarWidget> { | |
| // 4a. Private fields | |
| bool _isPressed = false; | |
| // 4b. Lifecycle methods | |
| @override | |
| void initState() { | |
| super.initState(); | |
| // TODO: implement initState | |
| } | |
| @override | |
| void dispose() { | |
| // TODO: implement dispose | |
| super.dispose(); | |
| } | |
| // 4c. Build method | |
| @override | |
| Widget build(BuildContext context) { | |
| final properties = _getProperties(); | |
| return InkWell( | |
| onTap: _validatePressed, | |
| child: Container( | |
| height: properties.height, | |
| color: properties.color, | |
| child: AppBar( | |
| title: Text(widget.title), | |
| ), | |
| ), | |
| ); | |
| } | |
| // 4d. Private methods | |
| void _validatePressed() { | |
| setState(() { | |
| _isPressed = !_isPressed; | |
| }); | |
| } | |
| _DSAppBarProperties _getProperties() => switch (widget.type) { | |
| DSAppBarType.primary => _DSAppBarProperties(height: widget.size.height, color: Colors.black), | |
| DSAppBarType.secondary => _DSAppBarProperties(height: widget.size.height, color: Colors.black12), | |
| DSAppBarType.tertiary => _DSAppBarProperties(height: widget.size.height, color: Colors.red) | |
| }; | |
| } | |
| // 5. Extensions | |
| extension DSAppBarSizeExtension on DSAppBarSize { | |
| double get height => switch (this) { | |
| DSAppBarSize.xs => 24, | |
| DSAppBarSize.s => 32, | |
| DSAppBarSize.m => 40, | |
| DSAppBarSize.l => 48, | |
| }; | |
| } | |
| // 6. Helper classes | |
| class _DSAppBarProperties { | |
| _DSAppBarProperties({required this.height, required this.color}); | |
| final double height; | |
| final Color color; | |
| } |
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