Upgrade to flutter v3

.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: f4abaa0735eba4dfd8f33f73363911d63931fe03
+  revision: 62bd79521d8d007524e351747471ba66696fc2d4
   channel: stable
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: android
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: ios
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: linux
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: macos
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: web
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+    - platform: windows
+      create_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+      base_revision: 62bd79521d8d007524e351747471ba66696fc2d4
+
+  # 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'

.vscode/launch.json

@@ -0,0 +1,25 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "FlutterScreens",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "FlutterScreens (profile mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "profile"
+        },
+        {
+            "name": "FlutterScreens (release mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "release"
+        }
+    ]
+}

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

lib/buttons/simple_round_icon_button.dart

@@ -45,12 +45,13 @@ class SimpleRoundIconButton extends StatelessWidget {
                             offset: Offset(-10.0, 0.0),
                             child: new Container(
                               padding: const EdgeInsets.all(5.0),
-                              child: FlatButton(
-                                shape: new RoundedRectangleBorder(
-                                    borderRadius:
-                                        new BorderRadius.circular(28.0)),
-                                splashColor: Colors.white,
-                                color: Colors.white,
+                              child: TextButton(
+                                style: TextButton.styleFrom(
+                                  shape: RoundedRectangleBorder(
+                                      borderRadius:
+                                          new BorderRadius.circular(28.0)),
+                                  backgroundColor: Colors.white,
+                                ),
                                 child: Icon(
                                   icon.icon,
                                   color: iconColor == null
@@ -78,12 +79,13 @@ class SimpleRoundIconButton extends StatelessWidget {
                             offset: Offset(10.0, 0.0),
                             child: new Container(
                               padding: const EdgeInsets.all(5.0),
-                              child: FlatButton(
-                                shape: new RoundedRectangleBorder(
-                                    borderRadius:
-                                        new BorderRadius.circular(28.0)),
-                                splashColor: Colors.white,
-                                color: Colors.white,
+                              child: TextButton(
+                                style: TextButton.styleFrom(
+                                  shape: RoundedRectangleBorder(
+                                      borderRadius:
+                                          new BorderRadius.circular(28.0)),
+                                  backgroundColor: Colors.white,
+                                ),
                                 child: Icon(
                                   icon.icon,
                                   color: iconColor == null

lib/buttons/simple_round_only_icon_button.dart

@@ -129,12 +129,13 @@ class SimpleRoundOnlyIconButton extends StatelessWidget {
                                     right: 5.0,
                                     top: 10.0,
                                     bottom: 10.0),
-                                child: FlatButton(
-                                  shape: new RoundedRectangleBorder(
-                                      borderRadius:
-                                          new BorderRadius.circular(28.0)),
-                                  splashColor: Colors.white,
-                                  color: Colors.white,
+                                child: TextButton(
+                                  style: TextButton.styleFrom(
+                                    shape: new RoundedRectangleBorder(
+                                        borderRadius:
+                                            new BorderRadius.circular(28.0)),
+                                    backgroundColor: Colors.white,
+                                  ),
                                   child: Icon(
                                     icon!.icon,
                                     color: this.iconColor,

lib/experiments/graph.dart

@@ -27,6 +27,12 @@ class _GraphState extends State<Graph> with SingleTickerProviderStateMixin {
     controller.repeat();
   }
 
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Center(

lib/loaders/color_loader.dart

@@ -8,18 +8,16 @@ class ColorLoader extends StatefulWidget {
   ColorLoader({this.colors, this.duration});
 
   @override
-  _ColorLoaderState createState() =>
-      _ColorLoaderState(this.colors!, this.duration!);
+  _ColorLoaderState createState() => _ColorLoaderState();
 }
 
 class _ColorLoaderState extends State<ColorLoader>
     with SingleTickerProviderStateMixin {
-  final List<Color> colors;
-  final Duration duration;
+  late final List<Color> colors =
+      widget.colors ?? [Colors.red, Colors.green, Colors.blue, Colors.yellow];
+  late final Duration duration = widget.duration ?? Duration(seconds: 2);
   late Timer timer;
 
-  _ColorLoaderState(this.colors, this.duration);
-
   //noSuchMethod(Invocation i) => super.noSuchMethod(i);
 
   List<ColorTween> tweenAnimations = [];
@@ -32,8 +30,6 @@ class _ColorLoaderState extends State<ColorLoader>
   void initState() {
     super.initState();
 
-
-
     controller = new AnimationController(
       vsync: this,
       duration: duration,

lib/loaders/load_view.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/material.dart';
+
+import 'color_loader_4.dart';
+import 'color_loader_5.dart';
+import 'loaders.dart';
+
+class LoaderWidgetPreview extends StatefulWidget {
+  const LoaderWidgetPreview({super.key});
+
+  @override
+  State<LoaderWidgetPreview> createState() => _LoaderWidgetPreviewState();
+}
+
+class _LoaderWidgetPreviewState extends State<LoaderWidgetPreview> {
+  final loaders = {
+    'ColorLoader': ColorLoader(),
+    'ColorLoader2': ColorLoader2(),
+    'ColorLoader3': ColorLoader3(),
+    'ColorLoader4': ColorLoader4(),
+    'ColorLoader5': ColorLoader5(),
+  };
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('Loader Preview')),
+      body: ListView.builder(
+        itemCount: loaders.length,
+        itemBuilder: (context, index) {
+          final key = loaders.keys.elementAt(index);
+
+          return Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: SizedBox(
+              height: 150,
+              child: Row(
+                children: [
+                  Text(key),
+                  Expanded(child: loaders[key]!),
+                ],
+              ),
+            ),
+          );
+        },
+      ),
+    );
+  }
+}

lib/loaders/loaders.dart

@@ -0,0 +1,7 @@
+export 'color_loader.dart';
+export 'color_loader_2.dart';
+export 'color_loader_3.dart';
+
+export 'dot_type.dart';
+export 'flip_loader.dart';
+export 'load_view.dart';