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auto_complete.dart
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auto_complete.dart
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import 'package:defer_pointer/defer_pointer.dart';
import 'package:flutter/material.dart';
class AutoCompleteExample extends StatelessWidget {
const AutoCompleteExample({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
body: DeferredPointerHandler(
child: Padding(
padding: const EdgeInsets.all(16),
child: Column(
children: [
_ExpandingSearchBox(),
const Expanded(child: Center(child: Placeholder())),
],
),
),
),
);
}
}
class _ExpandingSearchBox extends StatelessWidget {
_ExpandingSearchBox({Key? key}) : super(key: key);
final ValueNotifier<String> _textNotifier = ValueNotifier("");
@override
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: _textNotifier,
builder: (_, __) {
double size = (context.findRenderObject() as RenderBox?)?.size.height ?? 1;
String value = _textNotifier.value;
return Stack(
children: [
// Search Box
TextFormField(
decoration: const InputDecoration(hintText: 'Enter search text'),
onChanged: (value) => _textNotifier.value = value),
// Search Suggestions Dropdown
if (value != "")
Positioned(
top: size - 5,
left: -1,
right: -1,
child: DeferPointer(
paintOnTop: true,
child: _SearchResults(query: value),
),
)
],
);
},
);
}
}
class _SearchResults extends StatelessWidget {
final String query;
const _SearchResults({Key? key, required this.query}) : super(key: key);
@override
Widget build(BuildContext context) {
return Container(
width: double.infinity,
color: Colors.grey.shade200,
constraints: const BoxConstraints(maxHeight: 300),
child: SingleChildScrollView(
child: Column(
children: List.generate(
query.length,
(i) => TextButton(
child: const SizedBox(height: 30, width: double.infinity, child: Text("Some Suggestion... ")),
onPressed: () {})),
),
),
);
}
}