Refactor based on flutter_lints

analysis_options.yaml

@@ -0,0 +1,10 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml

example/analysis_options.yaml

@@ -0,0 +1,10 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml

example/lib/main.dart

@@ -4,10 +4,12 @@ import 'package:flutter/material.dart';
 import 'package:time_planner/time_planner.dart';
 
 void main() {
-  runApp(MyApp());
+  runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -16,13 +18,13 @@ class MyApp extends StatelessWidget {
         primarySwatch: Colors.blue,
         visualDensity: VisualDensity.adaptivePlatformDensity,
       ),
-      home: MyHomePage(title: 'Time planner'),
+      home: const MyHomePage(title: 'Time planner'),
     );
   }
 }
 
 class MyHomePage extends StatefulWidget {
-  MyHomePage({Key? key, required this.title}) : super(key: key);
+  const MyHomePage({Key? key, required this.title}) : super(key: key);
 
   final String title;
 
@@ -53,8 +55,8 @@ class _MyHomePageState extends State<MyHomePage> {
           minutesDuration: Random().nextInt(90) + 30,
           daysDuration: Random().nextInt(4) + 1,
           onTap: () {
-            ScaffoldMessenger.of(context).showSnackBar(
-                SnackBar(content: Text('You click on time planner object')));
+            ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
+                content: Text('You click on time planner object')));
           },
           child: Text(
             'this is a demo',
@@ -65,7 +67,7 @@ class _MyHomePageState extends State<MyHomePage> {
     });
 
     ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('Random task added to time planner!')));
+        const SnackBar(content: Text('Random task added to time planner!')));
   }
 
   @override
@@ -79,7 +81,7 @@ class _MyHomePageState extends State<MyHomePage> {
         child: TimePlanner(
           startHour: 6,
           endHour: 23,
-          headers: [
+          headers: const [
             TimePlannerTitle(
               date: "3/10/2021",
               title: "sunday",
@@ -176,7 +178,7 @@ class _MyHomePageState extends State<MyHomePage> {
       floatingActionButton: FloatingActionButton(
         onPressed: () => _addObject(context),
         tooltip: 'Add random task',
-        child: Icon(Icons.add),
+        child: const Icon(Icons.add),
       ),
     );
   }

example/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:
@@ -62,18 +62,39 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       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:
@@ -134,7 +155,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2"
+    version: "0.4.8"
   time_planner:
     dependency: "direct dev"
     description:
@@ -155,7 +176,7 @@ 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"
   flutter: ">=1.17.0"

example/pubspec.yaml

@@ -17,6 +17,7 @@ dev_dependencies:
     sdk: flutter
   time_planner:
     path: ../
+  flutter_lints: ^1.0.0
 
 flutter:
-  uses-material-design: true
+  uses-material-design: true

example/test/widget_test.dart

@@ -13,7 +13,7 @@ import 'package:time_planner_example/main.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
+    await tester.pumpWidget(const MyApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);