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42 changes: 42 additions & 0 deletions
42
notes/flutter_web/lib/routes/notes/cheatsheets/widgets/_examples/Form_FilterChip.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:you_flutter/state.dart'; | ||
|
|
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| main() { | ||
| runApp(MaterialApp(home: Scaffold(body: Form_FilterChip()))); | ||
| } | ||
|
|
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| // ignore: camel_case_types | ||
| class Form_FilterChip extends StatelessWidget { | ||
| Form_FilterChip({super.key}); | ||
|
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| final Set<String> selected = <String>{}.signal(); | ||
|
|
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| @override | ||
| Widget build(BuildContext context) { | ||
| return Watch( | ||
| builder: (context) { | ||
| return Column( | ||
| children: <Widget>[ | ||
| Wrap( | ||
| children: [ | ||
| for (var t in TargetPlatform.values) | ||
| FilterChip( | ||
| label: Text(t.name), | ||
| selected: selected.contains(t.name), | ||
| onSelected: (bool value) { | ||
| if (value) { | ||
| selected.add(t.name); | ||
| } else { | ||
| selected.remove(t.name); | ||
| } | ||
| }, | ||
| ) | ||
| ], | ||
| ), | ||
| FilledButton(onPressed: () => selected.clear(), child: const Text("Reset")), | ||
| ], | ||
| ); | ||
| }, | ||
| ); | ||
| } | ||
| } |
67 changes: 67 additions & 0 deletions
67
notes/flutter_web/lib/routes/notes/cheatsheets/widgets/_examples/Form_InputChip.dart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:you_flutter/state.dart'; | ||
|
|
||
| main() { | ||
| runApp(MaterialApp(home: Scaffold(body: Form_InputChip()))); | ||
| } | ||
|
|
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| // ignore: camel_case_types | ||
| class Form_InputChip extends StatefulWidget { | ||
| Form_InputChip({super.key}); | ||
|
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| @override | ||
| State<StatefulWidget> createState() { | ||
| return _State(); | ||
| } | ||
| } | ||
|
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| class _State extends State<Form_InputChip> { | ||
| final TextEditingController controller = TextEditingController(); | ||
| final List<String> tags = <String>[].signal(); | ||
|
|
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| @override | ||
| void dispose() { | ||
| controller.dispose(); | ||
| super.dispose(); | ||
| } | ||
|
|
||
| @override | ||
| Widget build(BuildContext context) { | ||
| return Watch( | ||
| watchListenable: controller, | ||
| builder: (context) { | ||
| return Column( | ||
| crossAxisAlignment: CrossAxisAlignment.start, | ||
| children: [ | ||
| TextField( | ||
| controller: controller, | ||
| decoration: const InputDecoration( | ||
| prefixIcon: Icon(Icons.add), | ||
| hintText: 'Write a tag, enter to add', | ||
| ), | ||
| onSubmitted: (_) { | ||
| if (controller.text.isNotEmpty) { | ||
| if (!tags.contains(controller.text)) { | ||
| tags.add(controller.text); | ||
| } | ||
| controller.clear(); // 清空TextField | ||
| } | ||
| }, | ||
| ), | ||
| Wrap( | ||
| spacing: 8.0, | ||
| children: tags.map((tag) { | ||
| return InputChip( | ||
| avatar: const Icon(Icons.tag), | ||
| label: Text(tag), | ||
| onDeleted: () => tags.remove(tag), | ||
| deleteIcon: const Icon(Icons.cancel), | ||
| ); | ||
| }).toList(), | ||
| ) | ||
| ], | ||
| ); | ||
| }, | ||
| ); | ||
| } | ||
| } |
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