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main.dart
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main.dart
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import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:spine_flutter_dart/spine_flutter_dart.dart';
/// \see http://ru.esotericsoftware.com/spine-runtimes-guide
void main() => runApp(const MyApp());
/// All animations. Format: `model_name: defaultAnimation`.
const Map<String, String> all = <String, String>{
'cauldron': 'idle',
'fox': 'idle',
'girl_and_whale_polygons': 'idle',
'girl_and_whale_rectangles': 'idle',
'owl': 'idle',
'raptor': 'walk',
'spineboy': 'walk',
};
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) => MaterialApp(
title: 'Flutter Spine Demo',
theme: ThemeData(primarySwatch: Colors.blue),
home: const MyHomePage(),
);
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
MyHomePageState createState() => MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> {
static const String pathPrefix = 'assets/';
String name = all.keys.last;
late Set<String> animations;
late SkeletonAnimation skeleton;
@override
Widget build(BuildContext context) => _buildFuture();
Widget _buildFuture() => FutureBuilder<bool>(
future: load(),
builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
if (snapshot.hasData) {
if (animations.isNotEmpty) {
final String defaultAnimation = all[name]!;
skeleton.state.setAnimation(0, defaultAnimation, true);
}
return _buildScreen();
}
return Container();
},
);
Widget _buildScreen() {
final SkeletonRenderObjectWidget skeletonWidget =
SkeletonRenderObjectWidget(
skeleton: skeleton,
animation: all[name],
alignment: Alignment.center,
fit: BoxFit.contain,
playState: PlayState.playing,
debugRendering: false,
triangleRendering: true,
//frameSizeMultiplier: 0.3,
);
final List<Widget> models = <Widget>[];
for (final String model in all.keys) {
models.add(
TextButton(
child: Text(model.toUpperCase()),
onPressed: () async {
name = model;
await load();
setState(() {
final String defaultAnimation = all[name]!;
skeleton.state.setAnimation(0, defaultAnimation, false);
});
},
),
);
}
final List<Widget> states = <Widget>[];
for (final String animation in animations) {
states.add(
TextButton(
child: Text(animation.toLowerCase()),
onPressed: () {
final String defaultAnimation = all[name]!;
skeleton.state
..setAnimation(0, animation, false)
..addAnimation(0, defaultAnimation, true, 0.0);
},
),
);
}
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(title: Text(name)),
body: Stack(
fit: StackFit.expand,
children: <Widget>[
skeletonWidget,
Positioned.fill(
child: Wrap(
runAlignment: WrapAlignment.start,
children: models,
),
),
Positioned.fill(
child: Wrap(
runAlignment: WrapAlignment.end,
children: states,
),
),
],
),
);
}
Future<bool> load() async {
animations = await loadAnimations();
skeleton = await loadSkeleton();
return true;
}
Future<Set<String>> loadAnimations() async {
final String skeletonFile = '$name.json';
final String s =
await rootBundle.loadString('$pathPrefix$name/$skeletonFile');
final Map<String, dynamic> data = json.decode(s);
return ((data['animations'] ?? <String, dynamic>{}) as Map<String, dynamic>)
.keys
.toSet();
}
Future<SkeletonAnimation> loadSkeleton() async =>
SkeletonAnimation.createWithFiles(name, pathBase: pathPrefix);
}