Fix tests and analyze problems

example/lib/app_utils.dart

@@ -1,7 +1,6 @@
 import 'dart:math' as math;
 
 class AppUtils {
-
   static final AppUtils _singleton = AppUtils._internal();
 
   factory AppUtils() {

example/lib/bar_chart/samples/bar_chart_sample4.dart

@@ -13,7 +13,7 @@ class BarChartSample4State extends State<BarChartSample4> {
   final Color normal = const Color(0xff64caad);
   final Color light = const Color(0xff73e8c9);
 
-  Widget bottomTitles(double value,TitleMeta meta) {
+  Widget bottomTitles(double value, TitleMeta meta) {
     const style = TextStyle(color: Color(0xff939393), fontSize: 10);
     String text;
     switch (value.toInt()) {

example/lib/bar_chart/samples/bar_chart_sample5.dart

@@ -87,7 +87,6 @@ class BarChartSample5State extends State<BarChartSample5> {
         break;
       default:
         return Container();
-        break;
     }
     return Center(child: Text(text, style: style));
   }

example/lib/line_chart/samples/line_chart_sample6.dart

@@ -181,10 +181,9 @@ class LineChartSample6 extends StatelessWidget {
                   ),
                   rightTitles: AxisTitles(
                     sideTitles: SideTitles(
-                      showTitles: true,
-                      getTitles: rightTitleWidgets,
-                      reservedSize: 30
-                    ),
+                        showTitles: true,
+                        getTitles: rightTitleWidgets,
+                        reservedSize: 30),
                   ),
                   bottomTitles: AxisTitles(
                     sideTitles: SideTitles(showTitles: false),

lib/src/chart/base/axis_chart/axis_chart_data.dart

@@ -6,7 +6,6 @@ import 'package:fl_chart/fl_chart.dart';
 import 'package:fl_chart/src/chart/base/axis_chart/axis_chart_painter.dart';
 import 'package:fl_chart/src/chart/base/base_chart/base_chart_data.dart';
 import 'package:fl_chart/src/utils/lerp.dart';
-import 'package:fl_chart/src/utils/utils.dart';
 import 'package:flutter/material.dart';
 
 /// This is the base class for axis base charts data
@@ -83,7 +82,6 @@ abstract class AxisChartData extends BaseChartData with EquatableMixin {
 
 /// Holds data for showing label values on axis numbers
 class SideTitles with EquatableMixin {
-
   /// Determines showing or hiding this side titles
   final bool showTitles;
 
@@ -156,16 +154,15 @@ class SideTitles with EquatableMixin {
   /// Used for equality check, see [EquatableMixin].
   @override
   List<Object?> get props => [
-    showTitles,
-    getTitles,
-    reservedSize,
-    interval,
-  ];
+        showTitles,
+        getTitles,
+        reservedSize,
+        interval,
+      ];
 }
 
 /// Holds data for showing each side titles (left, top, right, bottom)
 class AxisTitles with EquatableMixin {
-
   /// Determines the size of [axisName]
   final double axisNameSize;
 
@@ -201,8 +198,7 @@ class AxisTitles with EquatableMixin {
   static AxisTitles lerp(AxisTitles a, AxisTitles b, double t) {
     return AxisTitles(
       axisName: b.axisName,
-      axisNameSize:
-          lerpDouble(a.axisNameSize, b.axisNameSize, t),
+      axisNameSize: lerpDouble(a.axisNameSize, b.axisNameSize, t),
       sideTitles: SideTitles.lerp(a.sideTitles, b.sideTitles, t),
     );
   }
@@ -211,12 +207,12 @@ class AxisTitles with EquatableMixin {
   /// and replaces provided values.
   AxisTitles copyWith({
     Widget? axisName,
-    double? axisNameReservedSize,
+    double? axisNameSize,
     SideTitles? sideTitles,
   }) {
     return AxisTitles(
       axisName: axisName ?? this.axisName,
-      axisNameSize: axisNameReservedSize ?? this.axisNameSize,
+      axisNameSize: axisNameSize ?? this.axisNameSize,
       sideTitles: sideTitles ?? this.sideTitles,
     );
   }

lib/src/chart/base/axis_chart/axis_chart_helper.dart

@@ -74,7 +74,7 @@ class AxisChartHelper {
     final lastPosition = initialValue + (count * interval);
     final lastPositionOverlapsWithMax = lastPosition == max;
     final end =
-    !maxIncluded && lastPositionOverlapsWithMax ? max - interval : max;
+        !maxIncluded && lastPositionOverlapsWithMax ? max - interval : max;
 
     List<double> results = [];
     final epsilon = interval / 100000;

lib/src/chart/base/axis_chart/side_titles/side_titles_flex.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'dart:math' as math;
 
+/// Inspired from [Flex]
 class SideTitlesFlex extends MultiChildRenderObjectWidget {
   SideTitlesFlex({
     Key? key,
@@ -86,8 +87,6 @@ class AxisSideTitlesRenderFlex extends RenderBox
     }
   }
 
-  double _overflow = 0;
-
   @override
   void setupParentData(RenderBox child) {
     if (child.parentData is! FlexParentData) {
@@ -264,7 +263,6 @@ class AxisSideTitlesRenderFlex extends RenderBox
       constraints: constraints,
     );
 
-    final double allocatedSize = sizes.allocatedSize;
     double actualSize = sizes.mainSize;
     double crossSize = sizes.crossSize;
 
@@ -281,18 +279,8 @@ class AxisSideTitlesRenderFlex extends RenderBox
         crossSize = size.width;
         break;
     }
-    final double actualSizeDelta = actualSize - allocatedSize;
-    _overflow = math.max(0.0, -actualSizeDelta);
-    final double remainingSpace = math.max(0.0, actualSizeDelta);
-    late final double leadingSpace;
-    late final double betweenSpace;
-
-    // spaceBetween
-    leadingSpace = 0.0;
-    betweenSpace = childCount > 1 ? remainingSpace / (childCount - 1) : 0.0;
 
     // Position elements
-    double childMainPosition = leadingSpace;
     RenderBox? child = firstChild;
     int counter = 0;
     while (child != null) {
@@ -303,8 +291,8 @@ class AxisSideTitlesRenderFlex extends RenderBox
 
       // Stretch
       childCrossPosition = 0.0;
-      final childMainPosition = metaData.axisPixelLocation -
-          (_getMainSize(child.size) / 2);
+      final childMainPosition =
+          metaData.axisPixelLocation - (_getMainSize(child.size) / 2);
       switch (_direction) {
         case Axis.horizontal:
           childParentData.offset =

lib/src/chart/base/axis_chart/side_titles/side_titles_widget.dart

@@ -130,7 +130,8 @@ class SideTitlesWidget extends StatelessWidget {
     final interval = sideTitles.interval ??
         Utils().getEfficientInterval(
           axisViewSize,
-          axisMax - axisMin,);
+          axisMax - axisMin,
+        );
     if (isHorizontal && axisChartData is BarChartData) {
       final barChartData = axisChartData as BarChartData;
       final xLocations = barChartData.calculateGroupsX(axisViewSize);
@@ -147,7 +148,8 @@ class SideTitlesWidget extends StatelessWidget {
         max: axisMax,
         baseLine: axisBaseLine,
         interval: interval,
-      ).map((axisValue) {
+      )
+          .map((axisValue) {
         var portion = (axisValue - axisMin) / (axisMax - axisMin);
         if (isVertical) {
           portion = 1 - portion;

lib/src/chart/base/base_chart/base_chart_data.dart

@@ -1,10 +1,8 @@
 // coverage:ignore-file
 import 'dart:core';
-import 'dart:core';
 
 import 'package:equatable/equatable.dart';
 import 'package:fl_chart/fl_chart.dart';
-import 'package:fl_chart/src/utils/utils.dart';
 import 'package:flutter/material.dart';
 
 import 'base_chart_painter.dart';
@@ -25,16 +23,14 @@ abstract class BaseChartData with EquatableMixin {
   BaseChartData({
     FlBorderData? borderData,
     required FlTouchData touchData,
-  })
-      : borderData = borderData ?? FlBorderData(),
+  })  : borderData = borderData ?? FlBorderData(),
         touchData = touchData;
 
   BaseChartData lerp(BaseChartData a, BaseChartData b, double t);
 
   /// Used for equality check, see [EquatableMixin].
   @override
-  List<Object?> get props =>
-      [
+  List<Object?> get props => [
         borderData,
         touchData,
       ];
@@ -50,8 +46,7 @@ class FlBorderData with EquatableMixin {
   FlBorderData({
     bool? show,
     Border? border,
-  })
-      : show = show ?? true,
+  })  : show = show ?? true,
         border = border ??
             Border.all(
               color: Colors.black,
@@ -81,8 +76,7 @@ class FlBorderData with EquatableMixin {
 
   /// Used for equality check, see [EquatableMixin].
   @override
-  List<Object?> get props =>
-      [
+  List<Object?> get props => [
         show,
         border,
       ];
@@ -108,17 +102,17 @@ abstract class FlTouchData<R extends BaseTouchResponse> with EquatableMixin {
   final MouseCursorResolver<R>? mouseCursorResolver;
 
   /// You can disable or enable the touch system using [enabled] flag,
-  FlTouchData(bool enabled,
-      BaseTouchCallback<R>? touchCallback,
-      MouseCursorResolver<R>? mouseCursorResolver,)
-      : enabled = enabled,
+  FlTouchData(
+    bool enabled,
+    BaseTouchCallback<R>? touchCallback,
+    MouseCursorResolver<R>? mouseCursorResolver,
+  )   : enabled = enabled,
         touchCallback = touchCallback,
         mouseCursorResolver = mouseCursorResolver;
 
   /// Used for equality check, see [EquatableMixin].
   @override
-  List<Object?> get props =>
-      [
+  List<Object?> get props => [
         enabled,
         touchCallback,
         mouseCursorResolver,
@@ -186,10 +180,7 @@ class TitleMeta {
   final SideTitles sideTitles;
   final String formattedValue;
 
-  TitleMeta(this.min,
-      this.max,
-      this.appliedInterval,
-      this.sideTitles,
+  TitleMeta(this.min, this.max, this.appliedInterval, this.sideTitles,
       this.formattedValue);
 }
 

lib/src/chart/scatter_chart/scatter_chart.dart

@@ -46,7 +46,8 @@ class _ScatterChartState extends AnimatedWidgetBaseState<ScatterChart> {
     return AxisChartScaffoldWidget(
       data: showingData,
       chart: ScatterChartLeaf(
-        data: _withTouchedIndicators(_scatterChartDataTween!.evaluate(animation)),
+        data:
+            _withTouchedIndicators(_scatterChartDataTween!.evaluate(animation)),
         targetData: _withTouchedIndicators(showingData),
       ),
     );

lib/src/chart/scatter_chart/scatter_chart_data.dart

@@ -157,14 +157,11 @@ class ScatterChartData extends AxisChartData with EquatableMixin {
   @override
   List<Object?> get props => [
         scatterSpots,
-        titlesData,
         scatterTouchData,
         showingTooltipIndicators,
         gridData,
-        touchData,
-        borderData,
-        clipData,
-        backgroundColor,
+        titlesData,
+        rangeAnnotations,
         minX,
         maxX,
         baselineX,
@@ -173,6 +170,10 @@ class ScatterChartData extends AxisChartData with EquatableMixin {
         baselineY,
         rangeAnnotations,
         scatterLabelSettings,
+        clipData,
+        backgroundColor,
+        borderData,
+        touchData,
       ];
 }
 

lib/src/extensions/bar_chart_data_extension.dart

@@ -2,6 +2,7 @@ import 'package:fl_chart/src/chart/bar_chart/bar_chart_data.dart';
 
 extension BarChartDataExtension on BarChartData {
   List<double> calculateGroupsX(double viewWidth) {
+    assert(barGroups.isNotEmpty);
     final groupsX = List.filled(barGroups.length, 0.0, growable: false);
     switch (alignment) {
       case BarChartAlignment.start:
@@ -23,15 +24,14 @@ extension BarChartDataExtension on BarChartData {
 
       case BarChartAlignment.center:
         var sumWidth =
-        barGroups.map((group) => group.width).reduce((a, b) => a + b);
+            barGroups.map((group) => group.width).reduce((a, b) => a + b);
         sumWidth += groupsSpace * (barGroups.length - 1);
         final horizontalMargin = (viewWidth - sumWidth) / 2;
 
         var tempX = 0.0;
         for (var i = 0; i < barGroups.length; i++) {
           final group = barGroups[i];
-          groupsX[i] =
-              horizontalMargin + tempX + group.width / 2;
+          groupsX[i] = horizontalMargin + tempX + group.width / 2;
 
           final groupSpace = i == barGroups.length - 1 ? 0 : groupsSpace;
           tempX += group.width + groupSpace;
@@ -40,7 +40,7 @@ extension BarChartDataExtension on BarChartData {
 
       case BarChartAlignment.spaceBetween:
         final sumWidth =
-        barGroups.map((group) => group.width).reduce((a, b) => a + b);
+            barGroups.map((group) => group.width).reduce((a, b) => a + b);
         final spaceAvailable = viewWidth - sumWidth;
         final eachSpace = spaceAvailable / (barGroups.length - 1);
 
@@ -57,7 +57,7 @@ extension BarChartDataExtension on BarChartData {
 
       case BarChartAlignment.spaceAround:
         final sumWidth =
-        barGroups.map((group) => group.width).reduce((a, b) => a + b);
+            barGroups.map((group) => group.width).reduce((a, b) => a + b);
         final spaceAvailable = viewWidth - sumWidth;
         final eachSpace = spaceAvailable / (barGroups.length * 2);
 
@@ -73,7 +73,7 @@ extension BarChartDataExtension on BarChartData {
 
       case BarChartAlignment.spaceEvenly:
         final sumWidth =
-        barGroups.map((group) => group.width).reduce((a, b) => a + b);
+            barGroups.map((group) => group.width).reduce((a, b) => a + b);
         final spaceAvailable = viewWidth - sumWidth;
         final eachSpace = spaceAvailable / (barGroups.length + 1);
 

lib/src/extensions/edge_insets_extension.dart

@@ -2,16 +2,16 @@ import 'package:flutter/widgets.dart';
 
 extension EdgeInsetsExtension on EdgeInsets {
   EdgeInsets get onlyTopBottom => EdgeInsets.only(
-    left: 0,
-    top: top,
-    right: 0,
-    bottom: bottom,
-  );
+        left: 0,
+        top: top,
+        right: 0,
+        bottom: bottom,
+      );
 
   EdgeInsets get onlyLeftRight => EdgeInsets.only(
-    left: left,
-    top: 0,
-    right: right,
-    bottom: 0,
-  );
-}
+        left: left,
+        top: 0,
+        right: right,
+        bottom: 0,
+      );
+}