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BadFL Example Code (BadCheckBox)
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| import 'package:flutter/material.dart'; | |
| void main() => runApp(const MyApp()); | |
| class MyApp extends StatelessWidget { | |
| const MyApp({super.key}); | |
| @override | |
| Widget build(BuildContext context) { | |
| return MaterialApp( | |
| title: 'BadCheckBox demo', | |
| debugShowCheckedModeBanner: false, | |
| theme: ThemeData( | |
| primarySwatch: Colors.blue, | |
| ), | |
| home: const Example(), | |
| ); | |
| } | |
| } | |
| class Example extends StatefulWidget { | |
| const Example({super.key}); | |
| @override | |
| State<Example> createState() => _ExampleState(); | |
| } | |
| class _ExampleState extends State<Example> { | |
| bool _v1 = false; | |
| bool _v2 = false; | |
| int _count = 0; | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| body: ListView( | |
| padding: const EdgeInsets.all(16), | |
| children: [ | |
| // Example 1: Regular Checkbox | |
| BadCheckBox.icon( | |
| size: 24, | |
| icon: const Icon(Icons.check, size: 18), | |
| checked: _v1, | |
| border: Border.all(), | |
| onTap: () { | |
| setState(() { | |
| _v1 = !_v1; | |
| }); | |
| }, | |
| ), | |
| // Example 2: Custom Icon Builder | |
| BadCheckBox.iconBuilder( | |
| size: 24, | |
| iconBuilder: (c) { | |
| return c | |
| ? const Icon( | |
| Icons.check, | |
| color: Colors.green, | |
| ) | |
| : const Icon( | |
| Icons.close, | |
| color: Colors.red, | |
| ); | |
| }, | |
| checked: _v2, | |
| onTap: () { | |
| setState(() { | |
| _v2 = !_v2; | |
| }); | |
| }, | |
| ), | |
| // Example 3: Multiple States (3 states) | |
| BadCheckBox.iconBuilder( | |
| size: 24, | |
| iconBuilder: (c) { | |
| return c | |
| ? const Icon( | |
| Icons.check, | |
| color: Colors.green, | |
| ) | |
| : _count % 3 == 1 | |
| ? const Icon( | |
| Icons.close, | |
| color: Colors.red, | |
| ) | |
| : const Icon( | |
| Icons.remove, | |
| color: Colors.blue, | |
| ); | |
| }, | |
| checked: _count % 3 == 0, | |
| onTap: () { | |
| setState(() { | |
| _count += 1; | |
| }); | |
| }, | |
| ), | |
| ], | |
| ), | |
| ); | |
| } | |
| } | |
| // Since Dartpad does not support importing packages, | |
| // I need to copy the necessary code here. | |
| // You can directly use `import "package:bad_fl/bad_fl.dart"` to import it when using it | |
| class BadClickable extends StatelessWidget { | |
| final Widget child; | |
| final VoidCallback onClick; | |
| const BadClickable({ | |
| super.key, | |
| required this.child, | |
| required this.onClick, | |
| }); | |
| @override | |
| Widget build(BuildContext context) { | |
| return GestureDetector( | |
| onTap: onClick, | |
| behavior: HitTestBehavior.opaque, | |
| child: child, | |
| ); | |
| } | |
| } | |
| class BadCheckBox extends StatelessWidget { | |
| final double size; | |
| final Widget? icon; | |
| final Widget? Function(bool checked)? iconBuilder; | |
| final double iconSize; | |
| final Border? border; | |
| final bool rounded; | |
| final Color? fill; | |
| final Color? fillChecked; | |
| final bool checked; | |
| final VoidCallback onTap; | |
| final bool _useBuilder; | |
| const BadCheckBox.icon({ | |
| super.key, | |
| required this.size, | |
| required this.icon, | |
| double? iconSize, | |
| this.border, | |
| this.rounded = true, | |
| this.fill, | |
| Color? fillChecked, | |
| required this.checked, | |
| required this.onTap, | |
| }) : iconSize = iconSize ?? size, | |
| iconBuilder = null, | |
| fillChecked = fillChecked ?? fill, | |
| _useBuilder = false, | |
| assert(icon != null, 'icon must be provided'); | |
| const BadCheckBox.iconBuilder({ | |
| super.key, | |
| required this.size, | |
| required this.iconBuilder, | |
| double? iconSize, | |
| this.border, | |
| this.rounded = true, | |
| this.fill, | |
| Color? fillChecked, | |
| required this.checked, | |
| required this.onTap, | |
| }) : iconSize = iconSize ?? size, | |
| icon = null, | |
| fillChecked = fillChecked ?? fill, | |
| _useBuilder = true, | |
| assert(iconBuilder != null, 'iconBuilder must be provided'); | |
| @override | |
| Widget build(BuildContext context) { | |
| return SizedBox( | |
| width: size, | |
| height: size, | |
| child: Center( | |
| child: BadClickable( | |
| onClick: onTap, | |
| child: Container( | |
| width: size, | |
| height: size, | |
| clipBehavior: Clip.antiAlias, | |
| decoration: BoxDecoration( | |
| color: checked ? fillChecked : fill, | |
| border: border, | |
| borderRadius: rounded ? BorderRadius.circular(size / 2) : null, | |
| ), | |
| alignment: Alignment.center, | |
| child: SizedBox( | |
| width: iconSize, | |
| height: iconSize, | |
| child: _useBuilder | |
| ? iconBuilder!(checked) | |
| : checked | |
| ? icon | |
| : null, | |
| ), | |
| ), | |
| ), | |
| ), | |
| ); | |
| } | |
| } |
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