Use the flutter lints package for analysis

Author: gonuit

CHANGELOG.md

@@ -12,6 +12,7 @@
   - Added `onStateChanged` function argument that allows tracking indicator state changes.
   - The `IndicatorStateHelper` class is now deprecated in favor of `onStateChange` function and `IndicatorStateChange` class.
   - Initial support for programmatically-controlled indicators has been added. Added the `show`,` hide` and `refresh` methods to the` CustomRefreshIndicatorState` class. It can be accessed via GlobalKey. Take a look at an [programmatically-controlled screen example](/example/lib/screens/programmatically_controlled_indicator_screen.dart).
+  - Use the `flutter_lints` package for analysis.
 
 ## 1.0.0
 

example/lib/indicators/check_mark_indicator.dart

@@ -86,7 +86,7 @@ class _CheckMarkIndicatorState extends State<CheckMarkIndicator>
                               child: CircularProgressIndicator(
                                 strokeWidth: 2,
                                 valueColor:
-                                    AlwaysStoppedAnimation(Colors.white),
+                                    const AlwaysStoppedAnimation(Colors.white),
                                 value:
                                     controller.isDragging || controller.isArmed
                                         ? controller.value.clamp(0.0, 1.0)

example/lib/indicators/plane_indicator.dart

@@ -33,8 +33,9 @@ class _Cloud {
 class PlaneIndicator extends StatefulWidget {
   final Widget child;
   const PlaneIndicator({
+    Key? key,
     required this.child,
-  });
+  }) : super(key: key);
 
   @override
   _PlaneIndicatorState createState() => _PlaneIndicatorState();
@@ -64,49 +65,50 @@ class _PlaneIndicatorState extends State<PlaneIndicator>
       dy: 10.0,
       image: AssetImage(_Cloud._assets[1]),
       width: 100,
-      duration: Duration(milliseconds: 1600),
+      duration: const Duration(milliseconds: 1600),
     ),
     _Cloud(
       color: _Cloud._light,
       initialValue: 0.15,
       dy: 25.0,
       image: AssetImage(_Cloud._assets[3]),
       width: 40,
-      duration: Duration(milliseconds: 1600),
+      duration: const Duration(milliseconds: 1600),
     ),
     _Cloud(
       color: _Cloud._light,
       initialValue: 0.3,
       dy: 65.0,
       image: AssetImage(_Cloud._assets[2]),
       width: 60,
-      duration: Duration(milliseconds: 1600),
+      duration: const Duration(milliseconds: 1600),
     ),
     _Cloud(
       color: _Cloud._dark,
       initialValue: 0.8,
       dy: 70.0,
       image: AssetImage(_Cloud._assets[3]),
       width: 100,
-      duration: Duration(milliseconds: 1600),
+      duration: const Duration(milliseconds: 1600),
     ),
     _Cloud(
       color: _Cloud._normal,
       initialValue: 0.0,
       dy: 10,
       image: AssetImage(_Cloud._assets[0]),
       width: 80,
-      duration: Duration(milliseconds: 1600),
+      duration: const Duration(milliseconds: 1600),
     ),
   ];
 
   void _setupCloudsAnimationControllers() {
-    for (final cloud in _clouds)
+    for (final cloud in _clouds) {
       cloud.controller = AnimationController(
         vsync: this,
         duration: cloud.duration,
         value: cloud.initialValue,
       );
+    }
   }
 
   void _startPlaneAnimation() {
@@ -116,19 +118,25 @@ class _PlaneIndicatorState extends State<PlaneIndicator>
   void _stopPlaneAnimation() {
     _planeController
       ..stop()
-      ..animateTo(0.0, duration: Duration(milliseconds: 100));
+      ..animateTo(0.0, duration: const Duration(milliseconds: 100));
   }
 
   void _stopCloudAnimation() {
-    for (final cloud in _clouds) cloud.controller!.stop();
+    for (final cloud in _clouds) {
+      cloud.controller!.stop();
+    }
   }
 
   void _startCloudAnimation() {
-    for (final cloud in _clouds) cloud.controller!.repeat();
+    for (final cloud in _clouds) {
+      cloud.controller!.repeat();
+    }
   }
 
   void _disposeCloudsControllers() {
-    for (final cloud in _clouds) cloud.controller!.dispose();
+    for (final cloud in _clouds) {
+      cloud.controller!.dispose();
+    }
   }
 
   @override
@@ -190,7 +198,7 @@ class _PlaneIndicatorState extends State<PlaneIndicator>
                 if (_prevState != IndicatorState.idle)
                   Container(
                     height: _offsetToArmed * controller.value,
-                    color: Color(0xFFFDFEFF),
+                    color: const Color(0xFFFDFEFF),
                     width: double.infinity,
                     child: AnimatedBuilder(
                       animation: _clouds.first.controller!,
@@ -212,12 +220,10 @@ class _PlaneIndicatorState extends State<PlaneIndicator>
                                   maxHeight: cloud.width,
                                   maxWidth: cloud.width,
                                   alignment: Alignment.topLeft,
-                                  child: Container(
-                                    child: Image(
-                                      color: cloud.color,
-                                      image: cloud.image!,
-                                      fit: BoxFit.contain,
-                                    ),
+                                  child: Image(
+                                    color: cloud.color,
+                                    image: cloud.image!,
+                                    fit: BoxFit.contain,
                                   ),
                                 ),
                               ),

example/lib/indicators/simple_indicator.dart

@@ -6,9 +6,11 @@ import 'custom_indicator.dart';
 
 class SimpleIndicatorContent extends StatelessWidget {
   const SimpleIndicatorContent({
+    Key? key,
     required this.controller,
     this.indicatorSize = _defaultIndicatorSize,
-  }) : assert(indicatorSize > 0);
+  })  : assert(indicatorSize > 0),
+        super(key: key);
 
   final IndicatorController controller;
   static const _defaultIndicatorSize = 40.0;

example/lib/indicators/warp_indicator.dart

@@ -46,11 +46,11 @@ class _WarpIndicatorState extends State<WarpIndicator>
   WarpAnimationState _state = WarpAnimationState.stopped;
 
   List<Star> stars = [];
-  var _offsetTween = Tween<Offset>(
+  final _offsetTween = Tween<Offset>(
     begin: Offset.zero,
     end: Offset.zero,
   );
-  var _angleTween = Tween<double>(
+  final _angleTween = Tween<double>(
     begin: 0,
     end: 0,
   );
@@ -64,7 +64,7 @@ class _WarpIndicatorState extends State<WarpIndicator>
   void initState() {
     shakeController = AnimationController(
       vsync: this,
-      duration: Duration(milliseconds: 100),
+      duration: const Duration(milliseconds: 100),
     );
     super.initState();
   }
@@ -150,7 +150,7 @@ class _WarpIndicatorState extends State<WarpIndicator>
                           stars: stars,
                           color: widget.skyColor,
                         ),
-                        child: SizedBox.expand(),
+                        child: const SizedBox.expand(),
                       );
                     },
                   );
@@ -216,8 +216,8 @@ class Star {
     final random = Random();
     angle = random.nextDouble() * pi * 3;
     speed = Offset(cos(angle), sin(angle));
-    final minSpeedScale = 20;
-    final maxSpeedScale = 35;
+    const minSpeedScale = 20;
+    const maxSpeedScale = 35;
     final speedScale = minSpeedScale +
         random.nextInt(maxSpeedScale - minSpeedScale).toDouble();
     speed = speed.scale(
@@ -292,7 +292,7 @@ class Sky extends CustomPainter {
       return [
         CustomPainterSemantics(
           rect: rect,
-          properties: SemanticsProperties(
+          properties: const SemanticsProperties(
             label: 'Lightspeed animation.',
             textDirection: TextDirection.ltr,
           ),

example/lib/main.dart

@@ -11,9 +11,11 @@ import 'screens/check_mark_indicator_screen.dart';
 import 'screens/warp_indicator_screen.dart';
 import 'utils/mobile_like_scroll_behavior.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -22,28 +24,30 @@ class MyApp extends StatelessWidget {
       theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
-      home: MainScreen(),
+      home: const MainScreen(),
       builder: (context, child) => WebFrame(child: child),
       routes: {
-        '/example': (context) => ExampleIndicatorScreen(),
-        '/plane': (context) => PlaneIndicatorScreen(),
-        '/ice_cream': (context) => IceCreamIndicatorScreen(),
-        '/presentation': (context) => PresentationScreen(),
-        '/check-mark': (context) => CheckMarkIndicatorScreen(),
-        '/warp': (context) => WarpIndicatorScreen(),
+        '/example': (context) => const ExampleIndicatorScreen(),
+        '/plane': (context) => const PlaneIndicatorScreen(),
+        '/ice_cream': (context) => const IceCreamIndicatorScreen(),
+        '/presentation': (context) => const PresentationScreen(),
+        '/check-mark': (context) => const CheckMarkIndicatorScreen(),
+        '/warp': (context) => const WarpIndicatorScreen(),
         '/programmatically-controlled': (context) =>
-            ProgrammaticallyControlled(),
+            const ProgrammaticallyControlled(),
       },
     );
   }
 }
 
 class MainScreen extends StatelessWidget {
+  const MainScreen({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text("Examples"),
+        title: const Text("Examples"),
       ),
       body: SafeArea(
         child: ListView(
@@ -53,7 +57,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Presentation"),
+                child: const Text("Presentation"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -65,7 +69,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Simple"),
+                child: const Text("Simple"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -78,7 +82,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Simple with list opacity"),
+                child: const Text("Simple with list opacity"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -91,7 +95,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Plane"),
+                child: const Text("Plane"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -103,7 +107,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Ice cream"),
+                child: const Text("Ice cream"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -115,7 +119,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Check mark"),
+                child: const Text("Check mark"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -127,7 +131,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Warp indicator"),
+                child: const Text("Warp indicator"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,
@@ -140,7 +144,7 @@ class MainScreen extends StatelessWidget {
               child: Container(
                 height: 50,
                 alignment: Alignment.center,
-                child: Text("Programmatically-controlled warp"),
+                child: const Text("Programmatically-controlled warp"),
               ),
               onPressed: () => Navigator.pushNamed(
                 context,

example/lib/screens/check_mark_indicator_screen.dart

@@ -4,6 +4,8 @@ import 'package:example/widgets/example_list.dart';
 import 'package:flutter/material.dart';
 
 class CheckMarkIndicatorScreen extends StatefulWidget {
+  const CheckMarkIndicatorScreen({Key? key}) : super(key: key);
+
   @override
   _CheckMarkIndicatorScreenState createState() =>
       _CheckMarkIndicatorScreenState();
@@ -12,12 +14,12 @@ class CheckMarkIndicatorScreen extends StatefulWidget {
 class _CheckMarkIndicatorScreenState extends State<CheckMarkIndicatorScreen> {
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return const Scaffold(
       backgroundColor: appBackgroundColor,
-      appBar: const ExampleAppBar(),
+      appBar: ExampleAppBar(),
       body: SafeArea(
         child: CheckMarkIndicator(
-          child: const ExampleList(),
+          child: ExampleList(),
         ),
       ),
     );

example/lib/screens/example_indicator_screen.dart

@@ -5,6 +5,8 @@ import 'package:example/widgets/example_list.dart';
 import 'package:flutter/material.dart';
 
 class ExampleIndicatorScreen extends StatelessWidget {
+  const ExampleIndicatorScreen({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     final CustomIndicatorConfig customIndicator =

example/lib/screens/ice_cream_indicator_screen.dart

@@ -4,6 +4,8 @@ import 'package:example/widgets/example_list.dart';
 import 'package:flutter/material.dart';
 
 class IceCreamIndicatorScreen extends StatefulWidget {
+  const IceCreamIndicatorScreen({Key? key}) : super(key: key);
+
   @override
   _IceCreamIndicatorScreenState createState() =>
       _IceCreamIndicatorScreenState();
@@ -12,12 +14,12 @@ class IceCreamIndicatorScreen extends StatefulWidget {
 class _IceCreamIndicatorScreenState extends State<IceCreamIndicatorScreen> {
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return const Scaffold(
       backgroundColor: appBackgroundColor,
-      appBar: const ExampleAppBar(),
+      appBar: ExampleAppBar(),
       body: SafeArea(
         child: IceCreamIndicator(
-          child: const ExampleList(),
+          child: ExampleList(),
         ),
       ),
     );