searchfield
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Migrate Searchfield to use OverlayPortal
This will solve
- Issue https://github.com/maheshmnj/searchfield/issues/84
- Issue https://github.com/maheshmnj/searchfield/issues/38
sample demo code
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(
title: "My Home Page",
));
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: EdgeInsets.all(8.0),
child: CustomWidget(),
),
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headlineMedium,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class CustomWidget extends StatefulWidget {
const CustomWidget({Key? key}) : super(key: key);
@override
State<CustomWidget> createState() => _CustomWidgetState();
}
class _CustomWidgetState extends State<CustomWidget> {
final ScrollController _scrollController = ScrollController();
Widget _list() {
return Container(
height: 5 * 40,
child: Scrollbar(
controller: _scrollController,
thumbVisibility: true,
child: ListView.builder(
controller: _scrollController,
padding: EdgeInsets.zero,
itemCount: 20,
itemBuilder: (context, index) => ListTile(
title: Text('item $index'),
onTap: () {
_portalController.hide();
},
))),
);
}
@override
void initState() {
super.initState();
WidgetsBinding.instance.addPostFrameCallback((x) {
final renderBox = gkey.currentContext!.findRenderObject() as RenderBox;
tSize = renderBox.size;
offset = renderBox.localToGlobal(Offset.zero);
});
}
late Offset offset;
late Size tSize;
GlobalKey gkey = GlobalKey();
final OverlayPortalController _portalController = OverlayPortalController();
@override
Widget build(BuildContext context) {
Widget textfield() => TextFormField(
key: gkey,
decoration: InputDecoration(
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.black.withOpacity(0.8),
),
),
border: const OutlineInputBorder(
borderSide: BorderSide(color: Colors.red),
),
),
onTap: () {
print("offset: $offset, size= $tSize");
if (!_portalController.isShowing) {
_portalController.show();
}
},
onChanged: (query) {},
);
final size = MediaQuery.of(context).size;
final padding = MediaQuery.of(context).padding;
print(padding);
// final rightOffset = size.width - tSize.width - offset.dx;
return OverlayPortal(
controller: _portalController,
overlayChildBuilder: (BuildContext context) {
return Positioned(
right: 0,
left: offset.dx,
top: offset.dy + tSize.height, // + textfield height
child: Material(color: Colors.red, child: _list()));
},
child: textfield());
}
}