Beta (#1234)

web/particle_background/lib/main.dart

@@ -39,7 +39,7 @@ class Particles extends StatefulWidget {
   const Particles(this.numberOfParticles, {key}) : super(key: key);
 
   @override
-  _ParticlesState createState() => _ParticlesState();
+  State<Particles> createState() => _ParticlesState();
 }
 
 class _ParticlesState extends State<Particles> {

web/particle_background/lib/simple_animations_package.dart

@@ -36,7 +36,7 @@ class Rendering extends StatefulWidget {
       : super(key: key);
 
   @override
-  _RenderingState createState() => _RenderingState();
+  State<Rendering> createState() => _RenderingState();
 }
 
 class _RenderingState extends State<Rendering>
@@ -199,7 +199,7 @@ class MultiTrackTween extends Animatable<Map<String, dynamic>> {
 /// Single property to tween. Used by [MultiTrackTween].
 class Track<T> {
   final String name;
-  final List<_TrackItem> items = [];
+  final List<TrackItem> items = [];
 
   Track(this.name);
 
@@ -211,20 +211,20 @@ class Track<T> {
   /// Optionally you can set a named parameter [curve] that applies an easing
   /// curve to the tween.
   Track<T> add(Duration duration, Animatable<T> tween, {Curve? curve}) {
-    items.add(_TrackItem(duration, tween, curve: curve));
+    items.add(TrackItem(duration, tween, curve: curve));
     return this;
   }
 }
 
-class _TrackItem<T> {
+class TrackItem<T> {
   final Duration duration;
   late Animatable<T> tween;
 
-  _TrackItem(this.duration, Animatable<T> _tween, {Curve? curve}) {
+  TrackItem(this.duration, Animatable<T> tween, {Curve? curve}) {
     if (curve != null) {
-      tween = _tween.chain(CurveTween(curve: curve));
+      this.tween = tween.chain(CurveTween(curve: curve));
     } else {
-      tween = _tween;
+      this.tween = tween;
     }
   }
 }
@@ -336,7 +336,7 @@ class ControlledAnimation<T> extends StatefulWidget {
         super(key: key);
 
   @override
-  _ControlledAnimationState<T> createState() => _ControlledAnimationState<T>();
+  State<ControlledAnimation> createState() => _ControlledAnimationState<T>();
 }
 
 class _ControlledAnimationState<T> extends State<ControlledAnimation>

web/particle_background/pubspec.lock

@@ -26,14 +26,14 @@ packages:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   lints:
     dependency: transitive
     description:
       name: lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "2.0.0"
   material_color_utilities:
     dependency: transitive
     description:
@@ -61,4 +61,4 @@ packages:
     source: hosted
     version: "2.1.2"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.17.0-206.0.dev <3.0.0"

web/particle_background/pubspec.yaml

@@ -3,12 +3,12 @@ description: Example for the simple_animations package
 homepage: https://github.com/felixblaschke/simple_animations
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.17.0-0 <3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  flutter_lints: ^1.0.4
+  flutter_lints: ^2.0.1
 flutter:
   assets:
     - preview.png