refactor: follow linting rules by Lint package (#26)

example/pubspec.yaml

@@ -1,75 +1,29 @@
 name: example
 description: A new Flutter application.
 
-# The following defines the version and build number for your application.
-# A version number is three numbers separated by dots, like 1.2.43
-# followed by an optional build number separated by a +.
-# Both the version and the builder number may be overridden in flutter
-# build by specifying --build-name and --build-number, respectively.
-# Read more about versioning at semver.org.
 version: 1.0.0+1
+publish_to: "none"
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  flutter:
-    sdk: flutter
-
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.2
   avatar_glow:
     path: ../
 
+  cupertino_icons: ^1.0.2
+  flutter:
+    sdk: flutter
+
 dev_dependencies:
   flutter_test:
     sdk: flutter
 
-
-# For information on the generic Dart part of this file, see the
-# following page: https://www.dartlang.org/tools/pub/pubspec
-
-# The following section is specific to Flutter.
 flutter:
-
-  # The following line ensures that the Material Icons font is
-  # included with your application, so that you can use the icons in
-  # the material Icons class.
   uses-material-design: true
 
-  # To add assets to your application, add an assets section, like this:
   assets:
     - assets/images/avatar.png
     - assets/images/flutter.png
     - assets/images/love.png
     - assets/images/dart.png
-
-  #  - images/a_dot_burr.jpeg
-  #  - images/a_dot_ham.jpeg
-
-  # An image asset can refer to one or more resolution-specific "variants", see
-  # https://flutter.io/assets-and-images/#resolution-aware.
-
-  # For details regarding adding assets from package dependencies, see
-  # https://flutter.io/assets-and-images/#from-packages
-
-  # To add custom fonts to your application, add a fonts section here,
-  # in this "flutter" section. Each entry in this list should have a
-  # "family" key with the font family name, and a "fonts" key with a
-  # list giving the asset and other descriptors for the font. For
-  # example:
-  # fonts:
-  #   - family: Schyler
-  #     fonts:
-  #       - asset: fonts/Schyler-Regular.ttf
-  #       - asset: fonts/Schyler-Italic.ttf
-  #         style: italic
-  #   - family: Trajan Pro
-  #     fonts:
-  #       - asset: fonts/TrajanPro.ttf
-  #       - asset: fonts/TrajanPro_Bold.ttf
-  #         weight: 700
-  #
-  # For details regarding fonts from package dependencies,
-  # see https://flutter.io/custom-fonts/#from-packages

lib/avatar_glow.dart

@@ -38,36 +38,36 @@ class AvatarGlow extends StatefulWidget {
 
 class _AvatarGlowState extends State<AvatarGlow>
     with SingleTickerProviderStateMixin {
-  late final controller = AnimationController(
+  late final _controller = AnimationController(
     duration: widget.duration,
     vsync: this,
   );
   late final _curve = CurvedAnimation(
-    parent: controller,
+    parent: _controller,
     curve: widget.curve,
   );
-  late final Animation<double> _smallDiscAnimation = Tween(
+  late final _smallDiscAnimation = Tween(
     begin: (widget.endRadius * 2) / 6,
     end: (widget.endRadius * 2) * (3 / 4),
   ).animate(_curve);
-  late final Animation<double> _bigDiscAnimation = Tween(
+  late final _bigDiscAnimation = Tween(
     begin: 0.0,
-    end: (widget.endRadius * 2),
+    end: widget.endRadius * 2,
   ).animate(_curve);
-  late final Animation<double> _alphaAnimation = Tween(
+  late final _alphaAnimation = Tween(
     begin: 0.30,
     end: 0.0,
-  ).animate(controller);
+  ).animate(_controller);
 
-  late void Function(AnimationStatus status) _statusListener = (_) async {
-    if (controller.status == AnimationStatus.completed) {
+  Future<void> _statusListener(AnimationStatus status) async {
+    if (_controller.status == AnimationStatus.completed) {
       await Future.delayed(widget.repeatPauseDuration);
       if (mounted && widget.repeat && widget.animate) {
-        controller.reset();
-        controller.forward();
+        _controller.reset();
+        _controller.forward();
       }
     }
-  };
+  }
 
   @override
   void initState() {
@@ -89,78 +89,75 @@ class _AvatarGlowState extends State<AvatarGlow>
     super.didUpdateWidget(oldWidget);
   }
 
-  void _startAnimation() async {
-    controller.addStatusListener(_statusListener);
+  Future<void> _startAnimation() async {
+    _controller.addStatusListener(_statusListener);
     if (widget.startDelay != null) {
       await Future.delayed(widget.startDelay!);
     }
     if (mounted) {
-      controller.reset();
-      controller.forward();
+      _controller.reset();
+      _controller.forward();
     }
   }
 
-  void _stopAnimation() async {
-    controller.removeStatusListener(_statusListener);
+  Future<void> _stopAnimation() async {
+    _controller.removeStatusListener(_statusListener);
   }
 
   @override
   Widget build(BuildContext context) {
     return AnimatedBuilder(
       animation: _alphaAnimation,
       child: widget.child,
-      builder: (context, widgetChild) {
+      builder: (_, widgetChild) {
         final decoration = BoxDecoration(
           shape: widget.shape,
           // If the user picks a curve that goes below 0 or above 1
           // this opacity will have unexpected effects without clamping
           color: widget.glowColor.withOpacity(
-            _alphaAnimation.value.clamp(
-              0.0,
-              1.0,
-            ),
+            _alphaAnimation.value.clamp(0.0, 1.0),
           ),
         );
-        return Container(
+        return SizedBox(
           height: widget.endRadius * 2,
           width: widget.endRadius * 2,
           child: Stack(
             alignment: Alignment.center,
             children: <Widget>[
-              widget.animate ?
-              AnimatedBuilder(
-                animation: _bigDiscAnimation,
-                builder: (context, widget) {
-                  // If the user picks a curve that goes below 0,
-                  // this will throw without clamping
-                  final num size = _bigDiscAnimation.value.clamp(
-                    0.0,
-                    double.infinity,
-                  );
-                  return Container(
-                    height: size as double?,
-                    width: size as double?,
-                    decoration: decoration,
-                  );
-                },
-              ) : const SizedBox(height: 0.0, width: 0.0),
-              widget.animate && widget.showTwoGlows
-                  ? AnimatedBuilder(
-                animation: _smallDiscAnimation,
-                builder: (context, widget) {
-                  final num size = _smallDiscAnimation.value.clamp(
-                    0.0,
-                    double.infinity,
-                  );
+              if (widget.animate)
+                AnimatedBuilder(
+                  animation: _bigDiscAnimation,
+                  builder: (_, __) {
+                    // If the user picks a curve that goes below 0,
+                    // this will throw without clamping
+                    final _size =
+                        _bigDiscAnimation.value.clamp(0.0, double.infinity);
+
+                    return Container(
+                      height: _size,
+                      width: _size,
+                      decoration: decoration,
+                    );
+                  },
+                )
+              else
+                const SizedBox(height: 0.0, width: 0.0),
+              if (widget.animate && widget.showTwoGlows)
+                AnimatedBuilder(
+                  animation: _smallDiscAnimation,
+                  builder: (_, __) {
+                    final _size =
+                        _smallDiscAnimation.value.clamp(0.0, double.infinity);
 
-                  return Container(
-                    height: size as double?,
-                    width: size as double?,
-                    decoration: decoration,
-                  );
-                },
-              )
-                  : const SizedBox(height: 0.0, width: 0.0),
+                    return Container(
+                      height: _size,
+                      width: _size,
+                      decoration: decoration,
+                    );
+                  },
+                )
+              else
+                const SizedBox(height: 0.0, width: 0.0),
               widgetChild!,
             ],
           ),
@@ -171,7 +168,7 @@ class _AvatarGlowState extends State<AvatarGlow>
 
   @override
   void dispose() {
-    controller.dispose();
+    _controller.dispose();
     super.dispose();
   }
 }

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.1"
+    version: "2.8.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -21,7 +21,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
@@ -66,7 +66,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10"
+    version: "0.12.11"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
   meta:
     dependency: transitive
     description:
@@ -127,7 +134,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2"
+    version: "0.4.8"
   typed_data:
     dependency: transitive
     description:
@@ -141,6 +148,6 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.14.0 <3.0.0"