fix(treewide): migrate to sound null safety

Signed-off-by: Sphericalkat <me@kat.bio>

.fvmrc

@@ -0,0 +1,3 @@
+{
+  "flutter": "2.8.0"
+}

.gitignore

@@ -14,3 +14,6 @@ ios/Flutter/Generated.xcconfig
 ios/Runner/GeneratedPluginRegistrant.*
 
 .history/
+
+# FVM Version Cache
+.fvm/

CHANGELOG.md

@@ -1,4 +1,8 @@
-## [0.1.1] - 2021-03-08
+## [0.1.2] - 2021-03-08
+* Readme update
+## [0.1.1-2] - 2021-03-08
+* small improvement
+## [0.1.1-0] - 2021-03-08
 * removed deprecated call on `AnimatedCircularChartState`
 ## [0.1.0] - 2018-08-30
 

README.md

@@ -3,10 +3,10 @@
 # Flutter Circular Chart
 
 This library is a fork of the original [flutter_circular_chart](https://pub.dartlang.org/packages/flutter_circular_chart)
-This provides fix and will keep updating based on user PR
 
-A library for creating animated circular chart widgets with Flutter, inspired by [Zero to One with Flutter](https://medium.com/dartlang/zero-to-one-with-flutter-43b13fd7b354).
+This provides fix and will keep updating based on user PR, including help the migration to null-safety.
 
 ## Overview
-The original package provides the context
-[flutter_circular_chart](https://pub.dartlang.org/packages/flutter_circular_chart)
+The original package source can be found here: [flutter_circular_chart](https://pub.dartlang.org/packages/flutter_circular_chart)
+
+This package is abbandoned and no support is being planned. Fork, and publish as you wish with the referenc to the original. PRs will be refused.

example/animated_pie_chart_example.dart

@@ -57,7 +57,7 @@ class _AnimatedPieChartExampleState extends State<AnimatedPieChartExample> {
     setState(() {
       sampleIndex++;
       List<CircularStackEntry> data = _quarterlyProfitPieData[sampleIndex % 3];
-      _chartKey.currentState.updateData(data);
+      _chartKey.currentState!.updateData(data);
     });
   }
 

example/animated_radial_chart_example.dart

@@ -17,13 +17,13 @@ class _AnimatedRadialChartExampleState extends State<AnimatedRadialChartExample>
   final _chartSize = const Size(200.0, 200.0);
 
   double value = 50.0;
-  Color labelColor = Colors.blue[200];
+  Color? labelColor = Colors.blue[200];
 
   void _increment() {
     setState(() {
       value += 10;
       List<CircularStackEntry> data = _generateChartData(value);
-      _chartKey.currentState.updateData(data);
+      _chartKey.currentState!.updateData(data);
     });
   }
 
@@ -31,12 +31,12 @@ class _AnimatedRadialChartExampleState extends State<AnimatedRadialChartExample>
     setState(() {
       value -= 10;
       List<CircularStackEntry> data = _generateChartData(value);
-      _chartKey.currentState.updateData(data);
+      _chartKey.currentState!.updateData(data);
     });
   }
 
   List<CircularStackEntry> _generateChartData(double value) {
-    Color dialColor = Colors.blue[200];
+    Color? dialColor = Colors.blue[200];
     if (value < 0) {
       dialColor = Colors.red[200];
     } else if (value < 50) {
@@ -78,7 +78,7 @@ class _AnimatedRadialChartExampleState extends State<AnimatedRadialChartExample>
   @override
   Widget build(BuildContext context) {
     TextStyle _labelStyle =
-        Theme.of(context).textTheme.headline6.merge(TextStyle(color: labelColor));
+        Theme.of(context).textTheme.headline6!.merge(TextStyle(color: labelColor));
 
     return Scaffold(
       appBar: AppBar(

example/animated_random_radial_chart_example.dart

@@ -19,7 +19,7 @@ class _RandomizedRadialChartExampleState extends State<RandomizedRadialChartExam
   final GlobalKey<AnimatedCircularChartState> _chartKey = GlobalKey<AnimatedCircularChartState>();
   final _chartSize = const Size(300.0, 300.0);
   final Math.Random random = Math.Random();
-  List<CircularStackEntry> data;
+  List<CircularStackEntry>? data;
 
   @override
   void initState() {
@@ -32,7 +32,7 @@ class _RandomizedRadialChartExampleState extends State<RandomizedRadialChartExam
   void _randomize() {
     setState(() {
       data = _generateRandomData();
-      _chartKey.currentState.updateData(data);
+      _chartKey.currentState!.updateData(data!);
     });
   }
 
@@ -41,7 +41,7 @@ class _RandomizedRadialChartExampleState extends State<RandomizedRadialChartExam
     List<CircularStackEntry> data = List.generate(stackCount, (i) {
       int segCount = random.nextInt(10);
       List<CircularSegmentEntry> segments = List.generate(segCount, (j) {
-        Color randomColor = ColorPalette.primary.random(random);
+        Color? randomColor = ColorPalette.primary.random(random);
         return CircularSegmentEntry(random.nextDouble(), randomColor);
       });
       return CircularStackEntry(segments);

example/color_palette.dart

@@ -3,7 +3,7 @@ import 'dart:math';
 import 'package:flutter/material.dart';
 
 class ColorPalette {
-  static final ColorPalette primary = ColorPalette(<Color>[
+  static final ColorPalette primary = ColorPalette(<Color?>[
     Colors.blue[400],
     Colors.blue[200],
     Colors.red[400],
@@ -21,15 +21,15 @@ class ColorPalette {
     Colors.black,
   ]);
 
-  ColorPalette(List<Color> colors) : _colors = colors {
+  ColorPalette(List<Color?> colors) : _colors = colors {
     assert(colors.isNotEmpty);
   }
 
-  final List<Color> _colors;
+  final List<Color?> _colors;
 
-  Color operator [](int index) => _colors[index % length];
+  Color? operator [](int index) => _colors[index % length];
 
   int get length => _colors.length;
 
-  Color random(Random random) => this[random.nextInt(length)];
+  Color? random(Random random) => this[random.nextInt(length)];
 }

lib/src/animated_circular_chart.dart

@@ -25,9 +25,9 @@ enum SegmentEdgeStyle {
 
 class AnimatedCircularChart extends StatefulWidget {
   AnimatedCircularChart({
-    Key key,
-    @required this.size,
-    @required this.initialChartData,
+    Key? key,
+    required this.size,
+    required this.initialChartData,
     this.chartType = CircularChartType.Radial,
     this.duration = _kDuration,
     this.percentageValues = false,
@@ -51,7 +51,7 @@ class AnimatedCircularChart extends StatefulWidget {
   /// will be grouped together as concentric circles.
   ///
   /// If [chartType] is [CircularChartType.Pie] then length cannot be > 1.
-  final List<CircularStackEntry> initialChartData;
+  final List<CircularStackEntry>? initialChartData;
 
   /// The type of chart to be rendered.
   /// Use [CircularChartType.Pie] for a circle divided into slices for each entry.
@@ -76,7 +76,7 @@ class AnimatedCircularChart extends StatefulWidget {
   /// be automatically calculated to accommodate all the data.
   ///
   /// Has no effect in [CircularChartType.Pie] charts.
-  final double holeRadius;
+  final double? holeRadius;
 
   /// The chart gets drawn and animates clockwise from [startAngle], defaulting to the
   /// top/center point or -90.0. In terms of a clock face these would be:
@@ -92,13 +92,13 @@ class AnimatedCircularChart extends StatefulWidget {
   /// in the center of the chart's hole.
   ///
   /// See also [labelStyle] which is used to render the label.
-  final String holeLabel;
+  final String? holeLabel;
 
   /// The style used when rendering the [holeLabel].
   ///
   /// Defaults to the active [ThemeData]'s
   /// [ThemeData.textTheme.body2] text style.
-  final TextStyle labelStyle;
+  final TextStyle? labelStyle;
 
   /// The type of segment edges to be drawn.
   ///
@@ -113,11 +113,11 @@ class AnimatedCircularChart extends StatefulWidget {
   /// ```dart
   /// AnimatedCircularChartState animatedCircularChart = AnimatedCircularChart.of(context);
   /// ```
-  static AnimatedCircularChartState of(BuildContext context, {bool nullOk: false}) {
+  static AnimatedCircularChartState? of(BuildContext context, {bool nullOk: false}) {
     assert(context != null);
     assert(nullOk != null);
 
-    final AnimatedCircularChartState result =
+    final AnimatedCircularChartState? result =
         context.findAncestorStateOfType<AnimatedCircularChartState>();
 
     if (nullOk || result != null) return result;
@@ -151,10 +151,10 @@ class AnimatedCircularChart extends StatefulWidget {
 /// ```
 class AnimatedCircularChartState extends State<AnimatedCircularChart>
     with TickerProviderStateMixin {
-  CircularChartTween _tween;
-  AnimationController _animation;
-  final Map<String, int> _stackRanks = <String, int>{};
-  final Map<String, int> _entryRanks = <String, int>{};
+  late CircularChartTween _tween;
+  late AnimationController _animation;
+  final Map<String?, int> _stackRanks = <String?, int>{};
+  final Map<String?, int> _entryRanks = <String?, int>{};
   final TextPainter _labelPainter = TextPainter();
 
   @override
@@ -165,13 +165,13 @@ class AnimatedCircularChartState extends State<AnimatedCircularChart>
       vsync: this,
     );
 
-    _assignRanks(widget.initialChartData);
+    _assignRanks(widget.initialChartData!);
 
     _tween = CircularChartTween(
       CircularChart.empty(chartType: widget.chartType),
       CircularChart.fromData(
         size: widget.size,
-        data: widget.initialChartData,
+        data: widget.initialChartData!,
         chartType: widget.chartType,
         stackRanks: _stackRanks,
         entryRanks: _entryRanks,
@@ -215,7 +215,7 @@ class AnimatedCircularChartState extends State<AnimatedCircularChart>
 
   void _updateLabelPainter() {
     if (widget.holeLabel != null) {
-      TextStyle _labelStyle = widget.labelStyle ?? Theme.of(context).textTheme.bodyText1;
+      TextStyle? _labelStyle = widget.labelStyle ?? Theme.of(context).textTheme.bodyText1;
       _labelPainter
         ..text = TextSpan(style: _labelStyle, text: widget.holeLabel)
         ..textDirection = Directionality.of(context)

lib/src/circular_chart.dart

@@ -17,22 +17,22 @@ class CircularChart {
 
   final List<CircularChartStack> stacks;
   final CircularChartType chartType;
-  final SegmentEdgeStyle edgeStyle;
+  final SegmentEdgeStyle? edgeStyle;
 
-  factory CircularChart.empty({@required CircularChartType chartType}) {
+  factory CircularChart.empty({required CircularChartType chartType}) {
     return CircularChart(<CircularChartStack>[], chartType);
   }
 
   factory CircularChart.fromData({
-    @required Size size,
-    @required List<CircularStackEntry> data,
-    @required CircularChartType chartType,
-    @required bool percentageValues,
-    @required double startAngle,
-    Map<String, int> stackRanks,
-    Map<String, int> entryRanks,
-    double holeRadius,
-    SegmentEdgeStyle edgeStyle,
+    required Size size,
+    required List<CircularStackEntry> data,
+    required CircularChartType chartType,
+    required bool percentageValues,
+    required double startAngle,
+    Map<String?, int>? stackRanks,
+    Map<String?, int>? entryRanks,
+    double? holeRadius,
+    SegmentEdgeStyle? edgeStyle,
   }) {
     final double _holeRadius = holeRadius ?? size.width / (2 + data.length);
     final double stackDistance = (size.width / 2 - _holeRadius) / (2 + data.length);
@@ -42,7 +42,7 @@ class CircularChart {
     List<CircularChartStack> stacks = List<CircularChartStack>.generate(
       data.length,
       (i) => CircularChartStack.fromData(
-        stackRanks[data[i].rankKey] ?? i,
+        stackRanks![data[i].rankKey] ?? i,
         data[i].entries,
         entryRanks,
         percentageValues,
@@ -66,7 +66,7 @@ class CircularChartTween extends Tween<CircularChart> {
   @override
   CircularChart lerp(double t) => CircularChart(
         _stacksTween.lerp(t),
-        begin.chartType,
-        edgeStyle: end.edgeStyle,
+        begin!.chartType,
+        edgeStyle: end!.edgeStyle,
       );
 }

lib/src/entry.dart

@@ -19,11 +19,11 @@ class CircularSegmentEntry {
   final double value;
 
   /// The color drawn in the stack for this segment.
-  final Color color;
+  final Color? color;
 
   /// An optional String key, used when animating charts to preserve semantics when
   /// transitioning between data points.
-  final String rankKey;
+  final String? rankKey;
 
   String toString() {
     return '$rankKey: $value $color';
@@ -45,5 +45,5 @@ class CircularStackEntry {
 
   /// An optional String key, used when animating charts to preserve semantics when
   /// transitioning between data points.
-  final String rankKey;
+  final String? rankKey;
 }

lib/src/painter.dart

@@ -9,7 +9,7 @@ class AnimatedCircularChartPainter extends CustomPainter {
   AnimatedCircularChartPainter(this.animation, this.labelPainter) : super(repaint: animation);
 
   final Animation<CircularChart> animation;
-  final TextPainter labelPainter;
+  final TextPainter? labelPainter;
 
   @override
   void paint(Canvas canvas, Size size) {
@@ -39,7 +39,7 @@ class CircularChartPainter extends CustomPainter {
 
 const double _kRadiansPerDegree = Math.pi / 180;
 
-void _paintLabel(Canvas canvas, Size size, TextPainter labelPainter) {
+void _paintLabel(Canvas canvas, Size size, TextPainter? labelPainter) {
   if (labelPainter != null) {
     labelPainter.paint(
       canvas,
@@ -59,16 +59,16 @@ void _paintChart(Canvas canvas, Size size, CircularChart chart) {
 
   for (final CircularChartStack stack in chart.stacks) {
     for (final segment in stack.segments) {
-      segmentPaint.color = segment.color;
-      segmentPaint.strokeWidth = stack.width;
+      segmentPaint.color = segment.color!;
+      segmentPaint.strokeWidth = stack.width!;
 
       canvas.drawArc(
         Rect.fromCircle(
           center: Offset(size.width / 2, size.height / 2),
-          radius: stack.radius,
+          radius: stack.radius!,
         ),
-        stack.startAngle * _kRadiansPerDegree,
-        segment.sweepAngle * _kRadiansPerDegree,
+        stack.startAngle! * _kRadiansPerDegree,
+        segment.sweepAngle! * _kRadiansPerDegree,
         chart.chartType == CircularChartType.Pie,
         segmentPaint,
       );

lib/src/segment.dart

@@ -7,8 +7,8 @@ class CircularChartSegment extends MergeTweenable<CircularChartSegment> {
   CircularChartSegment(this.rank, this.sweepAngle, this.color);
 
   final int rank;
-  final double sweepAngle;
-  final Color color;
+  final double? sweepAngle;
+  final Color? color;
 
   @override
   CircularChartSegment get empty => CircularChartSegment(rank, 0.0, color);
@@ -38,5 +38,5 @@ class CircularChartSegmentTween extends Tween<CircularChartSegment> {
   }
 
   @override
-  CircularChartSegment lerp(double t) => CircularChartSegment.lerp(begin, end, t);
+  CircularChartSegment lerp(double t) => CircularChartSegment.lerp(begin!, end!, t);
 }

lib/src/stack.dart

@@ -17,15 +17,15 @@ class CircularChartStack implements MergeTweenable<CircularChartStack> {
   );
 
   final int rank;
-  final double radius;
-  final double width;
-  final double startAngle;
+  final double? radius;
+  final double? width;
+  final double? startAngle;
   final List<CircularChartSegment> segments;
 
   factory CircularChartStack.fromData(
     int stackRank,
     List<CircularSegmentEntry> entries,
-    Map<String, int> entryRanks,
+    Map<String?, int>? entryRanks,
     bool percentageValues,
     double startRadius,
     double stackWidth,
@@ -42,7 +42,7 @@ class CircularChartStack implements MergeTweenable<CircularChartStack> {
     List<CircularChartSegment> segments = List<CircularChartSegment>.generate(entries.length, (i) {
       double sweepAngle = (entries[i].value / valueSum * _kMaxAngle) + previousSweepAngle;
       previousSweepAngle = sweepAngle;
-      int rank = entryRanks[entries[i].rankKey] ?? i;
+      int rank = entryRanks![entries[i].rankKey] ?? i;
       return CircularChartSegment(rank, sweepAngle, entries[i].color);
     });
 
@@ -78,10 +78,10 @@ class CircularChartStackTween extends Tween<CircularChartStack> {
 
   @override
   CircularChartStack lerp(double t) => CircularChartStack(
-        begin.rank,
-        lerpDouble(begin.radius, end.radius, t),
-        lerpDouble(begin.width, end.width, t),
-        lerpDouble(begin.startAngle, end.startAngle, t),
+        begin!.rank,
+        lerpDouble(begin!.radius, end!.radius, t),
+        lerpDouble(begin!.width, end!.width, t),
+        lerpDouble(begin!.startAngle, end!.startAngle, t),
         _circularSegmentsTween.lerp(t),
       );
 }

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -21,14 +21,14 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -66,14 +66,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10"
+    version: "0.12.11"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
@@ -92,7 +92,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
@@ -127,7 +127,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19"
+    version: "0.4.3"
   typed_data:
     dependency: transitive
     description:
@@ -141,6 +141,6 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
 sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
+  dart: ">=2.14.0 <3.0.0"

pubspec.yaml

@@ -1,7 +1,7 @@
 name: flutter_circular_chart_two
 description: Animated radial and pie charts for Flutter. Forked from https://github.com/xqwzts/flutter_circular_chart
-version: 0.1.1-0
-homepage: https://github.com/GusRodrigues86/circular_charts
+version: "0.1.2"
+homepage: https://github.com/GusRodrigues86/flutter_circular_chart
 
 dependencies:
   flutter:
@@ -12,4 +12,4 @@ dev_dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.0.0 <3.0.0"
+  sdk: '>=2.12.0 <3.0.0'