Null Safety Migrated

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

example/ios/Flutter/flutter_export_environment.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=/home/jinosh/Documents/flutter_2.0.4/flutter"
+export "FLUTTER_APPLICATION_PATH=/home/jinosh/Programming/My_Packages/configurable_expansion_tile/example"
+export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build/ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=false"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.packages"

lib/configurable_expansion_tile.dart

@@ -15,12 +15,12 @@ class ConfigurableExpansionTile extends StatefulWidget {
  /// be specified for the animated transitions/states. [children] are revealed
  /// when the expansion tile is expanded.
  const ConfigurableExpansionTile(
- {Key key,
+ {Key? key,
  this.headerBackgroundColorStart = Colors.transparent,
  this.onExpansionChanged,
  this.children = const <Widget>[],
  this.initiallyExpanded = false,
- @required this.header,
+ required this.header,
  this.animatedWidgetFollowingHeader,
  this.animatedWidgetPrecedingHeader,
  this.expandedBackgroundColor,
@@ -35,15 +35,14 @@ class ConfigurableExpansionTile extends StatefulWidget {
  this.borderAnimationTween,
  this.animatedWidgetTurnTween,
  this.animatedWidgetTween})
- : assert(initiallyExpanded != null),
- super(key: key);
+ : super(key: key);
 
  /// Called when the tile expands or collapses.
  ///
  /// When the tile starts expanding, this function is called with the value
  /// true. When the tile starts collapsing, this function is called with
  /// the value false.
- final ValueChanged<bool> onExpansionChanged;
+ final ValueChanged<bool>? onExpansionChanged;
 
  /// The widgets that are displayed when the tile expands.
  ///
@@ -56,10 +55,10 @@ class ConfigurableExpansionTile extends StatefulWidget {
  final Color headerBackgroundColorStart;
 
  /// The [Color] the header will transition to on expand
- final Color headerBackgroundColorEnd;
+ final Color? headerBackgroundColorEnd;
 
  /// The [Color] of the background of the [children] when expanded
- final Color expandedBackgroundColor;
+ final Color? expandedBackgroundColor;
 
  /// Specifies if the list tile is initially expanded (true) or collapsed (false, the default).
  final bool initiallyExpanded;
@@ -68,13 +67,13 @@ class ConfigurableExpansionTile extends StatefulWidget {
  final Widget header;
 
  /// An optional widget to replace [header] with if the list is expanded
- final Widget headerExpanded;
+ final Widget? headerExpanded;
 
  /// A widget to rotate following the [header] (ie an arrow)
- final Widget animatedWidgetFollowingHeader;
+ final Widget? animatedWidgetFollowingHeader;
 
  /// A widget to rotate preceding the [header] (ie an arrow)
- final Widget animatedWidgetPrecedingHeader;
+ final Widget? animatedWidgetPrecedingHeader;
 
  /// The duration of the animations
  final Duration kExpand;
@@ -92,16 +91,16 @@ class ConfigurableExpansionTile extends StatefulWidget {
  final bool bottomBorderOn;
 
  /// Header transition tween
- final Animatable<double> headerAnimationTween;
+ final Animatable<double>? headerAnimationTween;
 
  /// Border animation tween
- final Animatable<double> borderAnimationTween;
+ final Animatable<double>? borderAnimationTween;
 
  /// Tween for turning [animatedWidgetFollowingHeader] and [animatedWidgetPrecedingHeader]
- final Animatable<double> animatedWidgetTurnTween;
+ final Animatable<double>? animatedWidgetTurnTween;
 
  /// [animatedWidgetFollowingHeader] and [animatedWidgetPrecedingHeader] transition tween
- final Animatable<double> animatedWidgetTween;
+ final Animatable<double>? animatedWidgetTween;
 
  static final Animatable<double> _easeInTween =
  CurveTween(curve: Curves.easeIn);
@@ -117,12 +116,12 @@ class ConfigurableExpansionTile extends StatefulWidget {
 
 class _ConfigurableExpansionTileState extends State<ConfigurableExpansionTile>
  with SingleTickerProviderStateMixin {
- AnimationController _controller;
- Animation<double> _iconTurns;
- Animation<double> _heightFactor;
+ late AnimationController _controller;
+ late Animation<double> _iconTurns;
+ late Animation<double> _heightFactor;
 
- Animation<Color> _borderColor;
- Animation<Color> _headerColor;
+ late Animation<Color?> _borderColor;
+ Animation<Color?>? _headerColor;
 
  final ColorTween _borderColorTween = ColorTween();
  final ColorTween _headerColorTween = ColorTween();
@@ -175,10 +174,10 @@ class _ConfigurableExpansionTileState extends State<ConfigurableExpansionTile>
  PageStorage.of(context)?.writeState(context, _isExpanded);
  });
  if (widget.onExpansionChanged != null)
- widget.onExpansionChanged(_isExpanded);
+ widget.onExpansionChanged!(_isExpanded);
  }
 
- Widget _buildChildren(BuildContext context, Widget child) {
+ Widget _buildChildren(BuildContext context, Widget? child) {
  final Color borderSideColor = _borderColor.value ?? widget.borderColorStart;
  final Color headerColor =
  _headerColor?.value ?? widget.headerBackgroundColorStart;

pubspec.lock

@@ -1,34 +1,55 @@
 # Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
+# See https://dart.dev/tools/pub/glossary#lockfile
 packages:
  async:
  dependency: transitive
  description:
  name: async
  url: "https://pub.dartlang.org"
  source: hosted
- version: "2.0.8"
+ version: "2.5.0"
  boolean_selector:
  dependency: transitive
  description:
  name: boolean_selector
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.0.4"
+ version: "2.1.0"
+ characters:
+ dependency: transitive
+ description:
+ name: characters
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "1.1.0"
  charcode:
  dependency: transitive
  description:
  name: charcode
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.1.2"
+ version: "1.2.0"
+ clock:
+ dependency: transitive
+ description:
+ name: clock
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "1.1.0"
  collection:
  dependency: transitive
  description:
  name: collection
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.14.11"
+ version: "1.15.0"
+ fake_async:
+ dependency: transitive
+ description:
+ name: fake_async
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "1.2.0"
  flutter:
  dependency: "direct main"
  description: flutter
@@ -45,28 +66,21 @@ packages:
  name: matcher
  url: "https://pub.dartlang.org"
  source: hosted
- version: "0.12.3+1"
+ version: "0.12.10"
  meta:
  dependency: transitive
  description:
  name: meta
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.1.6"
+ version: "1.3.0"
  path:
  dependency: transitive
  description:
  name: path
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.6.2"
- quiver:
- dependency: transitive
- description:
- name: quiver
- url: "https://pub.dartlang.org"
- source: hosted
- version: "2.0.1"
+ version: "1.8.0"
  sky_engine:
  dependency: transitive
  description: flutter
@@ -78,55 +92,55 @@ packages:
  name: source_span
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.4.1"
+ version: "1.8.0"
  stack_trace:
  dependency: transitive
  description:
  name: stack_trace
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.9.3"
+ version: "1.10.0"
  stream_channel:
  dependency: transitive
  description:
  name: stream_channel
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.6.8"
+ version: "2.1.0"
  string_scanner:
  dependency: transitive
  description:
  name: string_scanner
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.0.4"
+ version: "1.1.0"
  term_glyph:
  dependency: transitive
  description:
  name: term_glyph
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.0.1"
+ version: "1.2.0"
  test_api:
  dependency: transitive
  description:
  name: test_api
  url: "https://pub.dartlang.org"
  source: hosted
- version: "0.2.1"
+ version: "0.2.19"
  typed_data:
  dependency: transitive
  description:
  name: typed_data
  url: "https://pub.dartlang.org"
  source: hosted
- version: "1.1.6"
+ version: "1.3.0"
  vector_math:
  dependency: transitive
  description:
  name: vector_math
  url: "https://pub.dartlang.org"
  source: hosted
- version: "2.0.8"
+ version: "2.1.0"
 sdks:
- dart: ">=2.0.0 <3.0.0"
+ dart: ">=2.12.0 <3.0.0"

pubspec.yaml

@@ -5,7 +5,7 @@ author: Tyler Matthews <matthews.tyl@gmail.com>
 homepage: https://github.com/matthewstyler/configurable_expansion_tile
 
 environment:
- sdk: ">=2.0.0-dev.68.0 <3.0.0"
+ sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
  flutter: