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aku_new_community/lib/widget/search_bar_delegate.dart

77 lines
2.2 KiB

import 'package:flutter/material.dart';
import 'asset.dart';
class SearchBarDemo extends StatefulWidget {
_SearchBarDemoState createState() => _SearchBarDemoState();
}
class _SearchBarDemoState extends State<SearchBarDemo> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('SearchBarDemo'), actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () {
showSearch(context: context, delegate: searchBarDelegate());
}
// showSearch(context:context,delegate: searchBarDelegate()),
),
]));
}
}
class searchBarDelegate extends SearchDelegate<String> {
@override
List<Widget> buildActions(BuildContext context) {
return [
IconButton(
icon: Icon(Icons.clear),
onPressed: () => query = "",
)
];
}
@override
Widget buildLeading(BuildContext context) {
return IconButton(
icon: AnimatedIcon(
icon: AnimatedIcons.menu_arrow, progress: transitionAnimation),
onPressed: () => close(context, null));
}
@override
Widget buildResults(BuildContext context) {
return Container(
width: 100.0,
height: 100.0,
child: Card(
color: Colors.redAccent,
child: Center(
child: Text(query),
),
),
);
}
@override
Widget buildSuggestions(BuildContext context) {
final suggestionList = query.isEmpty
? recentSuggest
: searchList.where((input) => input.startsWith(query)).toList();
return ListView.builder(
itemCount: suggestionList.length,
itemBuilder: (context, index) => ListTile(
title: RichText(
text: TextSpan(
text: suggestionList[index].substring(0, query.length),
style: TextStyle(
color: Colors.black, fontWeight: FontWeight.bold),
children: [
TextSpan(
text: suggestionList[index].substring(query.length),
style: TextStyle(color: Colors.grey))
])),
));
}
}