letsar · JasCodes · Apr 16, 2023
diff --git a/analysis_options.yaml b/analysis_options.yaml
@@ -0,0 +1,28 @@
+# 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
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/example/.metadata b/example/.metadata
@@ -1,10 +1,45 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled and should not be manually edited.
+# This file should be version controlled.
 
 version:
-  revision: bbfbf1770cca2da7c82e887e4e4af910034800b6
+  revision: f72efea43c3013323d1b95cff571f3c1caa37583
   channel: stable
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: android
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: ios
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: linux
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: macos
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: web
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: windows
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/example/analysis_options.yaml b/example/analysis_options.yaml
@@ -0,0 +1,29 @@
+# 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
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/example/lib/common.dart b/example/lib/common.dart
@@ -38,17 +38,17 @@ class _FloatingActionButton extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return FloatingActionButton(
-      child: Icon(Icons.adjust),
       backgroundColor: Colors.green,
       onPressed: () {
         final double offset =
             DefaultStickyHeaderController.of(context)!.stickyHeaderScrollOffset;
-        PrimaryScrollController.of(context)!.animateTo(
+        PrimaryScrollController.of(context).animateTo(
           offset,
-          duration: Duration(milliseconds: 300),
+          duration: const Duration(milliseconds: 300),
           curve: Curves.easeIn,
         );
       },
+      child: const Icon(Icons.adjust),
     );
   }
 }
@@ -69,12 +69,12 @@ class Header extends StatelessWidget {
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: () {
-        print('hit $index');
+        debugPrint('hit $index');
       },
       child: Container(
         height: 60,
         color: color,
-        padding: EdgeInsets.symmetric(horizontal: 16.0),
+        padding: const EdgeInsets.symmetric(horizontal: 16.0),
         alignment: Alignment.centerLeft,
         child: Text(
           title ?? 'Header #$index',

diff --git a/example/lib/examples/animated_header.dart b/example/lib/examples/animated_header.dart
@@ -10,7 +10,7 @@ class AnimatedHeaderExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       title: 'Animated header Example',
       slivers: [
         _StickyHeaderList(index: 0),

diff --git a/example/lib/examples/grid.dart b/example/lib/examples/grid.dart
@@ -10,7 +10,7 @@ class GridExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       title: 'Grid Example',
       slivers: [
         _StickyHeaderGrid(index: 0),
@@ -35,15 +35,10 @@ class _StickyHeaderGrid extends StatelessWidget {
     return SliverStickyHeader(
       header: Header(index: index),
       sliver: SliverGrid(
-        gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
             crossAxisCount: 3, crossAxisSpacing: 4.0, mainAxisSpacing: 4.0),
         delegate: SliverChildBuilderDelegate(
           (context, i) => GridTile(
-            child: Card(
-              child: Container(
-                color: Colors.green,
-              ),
-            ),
             footer: Container(
               color: Colors.white.withOpacity(0.5),
               child: Padding(
@@ -54,6 +49,11 @@ class _StickyHeaderGrid extends StatelessWidget {
                 ),
               ),
             ),
+            child: Card(
+              child: Container(
+                color: Colors.green,
+              ),
+            ),
           ),
           childCount: 9,
         ),

diff --git a/example/lib/examples/list.dart b/example/lib/examples/list.dart
@@ -10,7 +10,7 @@ class ListExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       title: 'List Example',
       slivers: [
         _StickyHeaderList(index: 0),
@@ -38,7 +38,7 @@ class _StickyHeaderList extends StatelessWidget {
         delegate: SliverChildBuilderDelegate(
           (context, i) => ListTile(
             onTap: () {
-              print('tile $i');
+              debugPrint('tile $i');
             },
             leading: CircleAvatar(
               child: Text('$index'),

diff --git a/example/lib/examples/mix_slivers.dart b/example/lib/examples/mix_slivers.dart
@@ -13,7 +13,7 @@ class MixSliversExample extends StatelessWidget {
     return AppScaffold(
       title: 'List Example',
       slivers: [
-        SliverAppBar(
+        const SliverAppBar(
           backgroundColor: Colors.orange,
           title: Text('SliverAppBar'),
           automaticallyImplyLeading: false,
@@ -25,10 +25,10 @@ class MixSliversExample extends StatelessWidget {
             color: Colors.red,
           ),
         ),
-        _StickyHeaderList(index: 0),
-        _StickyHeaderList(index: 1),
-        _StickyHeaderList(index: 2),
-        _StickyHeaderList(index: 3),
+        const _StickyHeaderList(index: 0),
+        const _StickyHeaderList(index: 1),
+        const _StickyHeaderList(index: 2),
+        const _StickyHeaderList(index: 3),
       ],
     );
   }

diff --git a/example/lib/examples/nested.dart b/example/lib/examples/nested.dart
@@ -14,17 +14,17 @@ class NestedExample extends StatelessWidget {
       title: 'Nested Sticky Headers',
       slivers: [
         SliverStickyHeader(
-          header: Header(title: '1'),
+          header: const Header(title: '1'),
           sliver: MultiSliver(
             children: [
-              SliverStickyHeader(
+              const SliverStickyHeader(
                 header: Header(title: '1.1'),
                 sliver: _SliverLeaf(),
               ),
               SliverStickyHeader(
-                header: Header(title: '1.2'),
+                header: const Header(title: '1.2'),
                 sliver: MultiSliver(
-                  children: [
+                  children: const [
                     SliverStickyHeader(
                       header: Header(title: '1.2.1'),
                       sliver: _SliverLeaf(),
@@ -40,25 +40,25 @@ class NestedExample extends StatelessWidget {
                   ],
                 ),
               ),
-              SliverStickyHeader(
+              const SliverStickyHeader(
                 header: Header(title: '1.3'),
                 sliver: _SliverLeaf(),
               ),
             ],
           ),
         ),
         SliverStickyHeader(
-          header: Header(title: '2'),
+          header: const Header(title: '2'),
           sliver: MultiSliver(
             children: [
-              SliverStickyHeader(
+              const SliverStickyHeader(
                 header: Header(title: '2.1'),
                 sliver: _SliverLeaf(),
               ),
               SliverStickyHeader(
-                header: Header(title: '2.2'),
+                header: const Header(title: '2.2'),
                 sliver: MultiSliver(
-                  children: [
+                  children: const [
                     SliverStickyHeader(
                       header: Header(title: '2.2.1'),
                       sliver: _SliverLeaf(),
@@ -74,21 +74,21 @@ class NestedExample extends StatelessWidget {
                   ],
                 ),
               ),
-              SliverStickyHeader(
+              const SliverStickyHeader(
                 header: Header(title: '2.3'),
                 sliver: _SliverLeaf(),
               ),
             ],
           ),
         ),
-        SliverStickyHeader(
+        const SliverStickyHeader(
           header: Header(title: '3'),
           sliver: _SliverLeaf(),
         ),
         SliverStickyHeader(
-          header: Header(title: '4'),
+          header: const Header(title: '4'),
           sliver: MultiSliver(
-            children: [
+            children: const [
               SliverStickyHeader(
                 header: Header(title: '4.1'),
                 sliver: _SliverLeaf(),

diff --git a/example/lib/examples/not_sticky.dart b/example/lib/examples/not_sticky.dart
@@ -10,7 +10,7 @@ class NotStickyExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       title: 'Not Sticky Example',
       slivers: [
         _NotStickyList(index: 0),
@@ -39,7 +39,7 @@ class _NotStickyList extends StatelessWidget {
         delegate: SliverChildBuilderDelegate(
           (context, i) => ListTile(
             onTap: () {
-              print('tile $i');
+              debugPrint('tile $i');
             },
             leading: CircleAvatar(
               child: Text('$index'),

diff --git a/example/lib/examples/reverse.dart b/example/lib/examples/reverse.dart
@@ -10,7 +10,7 @@ class ReverseExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       reverse: true,
       title: 'Reverse Example',
       slivers: [

diff --git a/example/lib/examples/side_header.dart b/example/lib/examples/side_header.dart
@@ -10,7 +10,7 @@ class SideHeaderExample extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return AppScaffold(
+    return const AppScaffold(
       title: 'Side Header Example',
       slivers: [
         _StickyHeaderGrid(index: 0),
@@ -38,15 +38,10 @@ class _StickyHeaderGrid extends StatelessWidget {
       sliver: SliverPadding(
         padding: const EdgeInsets.only(left: 60),
         sliver: SliverGrid(
-          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+          gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
               crossAxisCount: 3, crossAxisSpacing: 4.0, mainAxisSpacing: 4.0),
           delegate: SliverChildBuilderDelegate(
             (context, i) => GridTile(
-              child: Card(
-                child: Container(
-                  color: Colors.green,
-                ),
-              ),
               footer: Container(
                 color: Colors.white.withOpacity(0.5),
                 child: Padding(
@@ -57,6 +52,11 @@ class _StickyHeaderGrid extends StatelessWidget {
                   ),
                 ),
               ),
+              child: Card(
+                child: Container(
+                  color: Colors.green,
+                ),
+              ),
             ),
             childCount: 9,
           ),