dynamic_widget 5.0.0 
dynamic_widget: ^5.0.0 copied to clipboard
A Backend-Driven UI toolkit, build your dynamic UI with json, and the json format is very similar with flutter widget code。
import 'dart:async';
import 'package:demo/widget_json.dart';
import 'package:dynamic_widget/dynamic_widget.dart';
import 'package:dynamic_widget/dynamic_widget/basic/dynamic_widget_json_exportor.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Dynamic Widget',
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Dynamic Widget Demo'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: CustomScrollView(slivers: [
SliverPadding(
padding: EdgeInsets.fromLTRB(20, 20, 20, 0),
sliver: SliverList(
delegate: SliverChildListDelegate([
ElevatedButton(
child: Text("Dynamic Widget Json String Export Example"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => JSONExporter()));
},
)
]),
)),
SliverPadding(
padding: EdgeInsets.all(20),
sliver: SliverGrid(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
mainAxisSpacing: 10,
crossAxisCount: 3,
crossAxisSpacing: 10,
),
delegate: SliverChildListDelegate([
ElevatedButton(
child: Text("Container"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(containerJson)));
},
),
ElevatedButton(
child: Text("Row"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(rowJson)));
},
),
ElevatedButton(
child: Text("Column"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(columnJson)));
},
),
ElevatedButton(
child: Text("Text"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(textJson)));
},
),
ElevatedButton(
child: Text("SelectableText"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(selectableTextJson)));
},
),
ElevatedButton(
child: Text("TextSpan"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(textSpanJson)));
},
),
ElevatedButton(
child: Text("Icon"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(iconJson)));
},
),
ElevatedButton(
child: Text("DropCapText"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(dropCapTextJson)));
},
),
ElevatedButton(
child: Text("DropCapText with Image"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(dropCapTextImageJson)));
},
),
ElevatedButton(
child: Text("ElevatedButton"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(elevatedButtonJson)));
},
),
ElevatedButton(
child: Text("TextButton"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(textButtonJson)));
},
),
ElevatedButton(
child: Text("Asset Image"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(assetImageJson)));
},
),
ElevatedButton(
child: Text("Network Image"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(networkImageJson)));
},
),
ElevatedButton(
child: Text("Placeholder"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(placeholderJson)));
},
),
ElevatedButton(
child: Text("GridView"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(gridviewJson)));
},
),
ElevatedButton(
child: Text("ListView"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(listviewJson)));
},
),
ElevatedButton(
child: Text("PageView"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(pageviewJson)));
},
),
ElevatedButton(
child: Text("Expanded"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(expandedJson)));
},
),
ElevatedButton(
child: Text("ListView Auto load more"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(listviewLoadmoreJson)));
},
),
ElevatedButton(
child: Text("GridView Auto load more"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(gridviewloadmoreJson)));
},
),
ElevatedButton(
child: Text("Stack and Positioned"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(stackJson)));
},
),
ElevatedButton(
child: Text("IndexedStack"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(indexedstackJson)));
},
),
ElevatedButton(
child: Text("SizedBox"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(sizedboxJson)));
},
),
ElevatedButton(
child: Text("Opacity"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(opacityJson)));
},
),
ElevatedButton(
child: Text("Wrap"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(wrapJson)));
},
),
ElevatedButton(
child: Text("ClipRRect"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(cliprrectJson)));
},
),
ElevatedButton(
child: Text("SafeArea"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(safeareaJson)));
},
),
ElevatedButton(
child: Text("ListTile"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(listTileJson)));
},
),
ElevatedButton(
child: Text("Scaffold & AppBar"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(scaffoldAppBarJson)));
},
),
ElevatedButton(
child: Text("LimitedBox"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(limitedboxJson)));
},
),
ElevatedButton(
child: Text("Offstage"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(offstageJson)));
},
),
ElevatedButton(
child: Text("OverflowBox"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(overflowboxJson)));
},
),
ElevatedButton(
child: Text("Divider"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(dividerJson)));
},
),
ElevatedButton(
child: Text("RotatedBox"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(rotatedBoxJson)));
},
),
ElevatedButton(
child: Text("Card"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(cardJson)));
},
),
ElevatedButton(
child: Text("SingleChildScrollView"),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(singleChildScrollViewJson)));
},
),
]),
),
),
]));
}
}
class CodeEditorPage extends StatefulWidget {
final String jsonString;
CodeEditorPage(this.jsonString);
@override
State<StatefulWidget> createState() {
// TODO: implement createState
return _CodeEditorPageState(jsonString);
}
}
class _CodeEditorPageState extends State<CodeEditorPage> {
String jsonString;
TextEditingController controller = TextEditingController();
_CodeEditorPageState(this.jsonString);
@override
Widget build(BuildContext context) {
var widget = Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text("Code Editor"),
),
body: Column(
children: <Widget>[
Expanded(
child: Container(
margin: EdgeInsets.all(8),
padding: EdgeInsets.all(8),
constraints: BoxConstraints.expand(
width: double.infinity, height: double.infinity),
child: TextField(
controller: controller,
decoration: InputDecoration(hintText: 'Enter json string'),
maxLines: 1000000,
),
),
),
SizedBox(
height: 8,
),
ElevatedButton(
child: Text("Preview"),
onPressed: () {
setState(() {
jsonString = controller.text;
});
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => PreviewPage(controller.text)));
},
)
],
));
controller.text = jsonString;
return widget;
}
}
// ignore: must_be_immutable
class PreviewPage extends StatelessWidget {
final String jsonString;
PreviewPage(this.jsonString);
late DynamicWidgetJsonExportor? _exportor;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text("Preview"),
),
body: Column(
children: [
Expanded(
child: FutureBuilder<Widget?>(
future: _buildWidget(context),
builder: (BuildContext context, AsyncSnapshot<Widget?> snapshot) {
if (snapshot.hasError) {
print(snapshot.error);
}
return snapshot.hasData
? _exportor = DynamicWidgetJsonExportor(
child: snapshot.data,
)
: Text("Loading...");
},
),
),
ElevatedButton(
onPressed: () {
var exportJsonString = _exportor?.exportJsonString();
if (exportJsonString!=null)
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeEditorPage(exportJsonString)));
},
child: Text("export json code"),
)
],
),
);
}
Future<Widget?> _buildWidget(BuildContext context) async {
return DynamicWidgetBuilder.build(
jsonString, context, new DefaultClickListener());
}
}
class DefaultClickListener implements ClickListener {
@override
void onClicked(String? event) {
print("Receive click event: " + (event == null ? "" : event));
}
}
class JSONExporter extends StatefulWidget {
@override
_JSONExporterState createState() => _JSONExporterState();
}
class _JSONExporterState extends State<JSONExporter> {
GlobalKey key = GlobalKey();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text("export example"),
),
body: Builder(
builder: (context) => Container(
width: double.infinity,
child: Column(
children: [
Expanded(
child: DynamicWidgetJsonExportor(
key: key,
child: Stack(
alignment: Alignment.topLeft,
children: [
Image.asset("assets/vip.png"),
Positioned(
child: Image.asset("assets/vip.png"),
top: 50,
left: 50,
)
],
),
),
),
Container(
child: ElevatedButton(
child: Text("Export"),
onPressed: () {
var exportor =
key.currentWidget as DynamicWidgetJsonExportor;
var exportJsonString = exportor.exportJsonString();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content:
Text("json string was exported to editor page.")));
Future.delayed(Duration(seconds: 1), () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CodeEditorPage(exportJsonString)));
});
},
),
)
],
),
),
),
);
}
}Metadata
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Metadata
A Backend-Driven UI toolkit, build your dynamic UI with json, and the json format is very similar with flutter widget code。
Repository (GitHub)
View/report issues
Documentation
License
Apache-2.0 (license)
Dependencies
flutter, font_awesome_flutter, http, logging
