Add options to customise border in Dataset widget

@@ -8,6 +8,7 @@
 - Fix unit tests
 - Update Image dependency
 - Fix lints
+- Add options to customise border in Dataset widget [838]
 
 ## 3.8.4
 

@@ -27,8 +27,8 @@ class BarDataSet<T extends PointChartValue> extends PointDataSet<T> {
   BarDataSet({
     required List<T> data,
     String? legend,
-    this.borderColor,
-    this.borderWidth = 1.5,
+    PdfColor? borderColor,
+    double borderWidth = 1.5,
     PdfColor color = PdfColors.blue,
     bool? drawBorder,
     this.drawSurface = true,
@@ -54,11 +54,11 @@ class BarDataSet<T extends PointChartValue> extends PointDataSet<T> {
           pointSize: pointSize,
           shape: shape,
           valuePosition: valuePosition,
+          borderColor: borderColor,
+          borderWidth: borderWidth,
         );
 
   final bool drawBorder;
-  final PdfColor? borderColor;
-  final double borderWidth;
 
   final bool drawSurface;
 

@@ -152,12 +152,18 @@ abstract class Dataset extends Widget {
   Dataset({
     this.legend,
     this.color,
+    this.borderColor,
+    this.borderWidth = .5,
   });
 
   final String? legend;
 
   final PdfColor? color;
 
+  final PdfColor? borderColor;
+
+  final double borderWidth;
+
   void paintBackground(Context context) {}
 
   void paintForeground(Context context) {}
@@ -167,8 +173,8 @@ abstract class Dataset extends Widget {
       decoration: BoxDecoration(
         color: color,
         border: Border.all(
-          color: PdfColors.black,
-          width: .5,
+          color: borderColor ?? PdfColors.black,
+          width: borderWidth,
         ),
       ),
     );

@@ -118,8 +118,8 @@ class PieDataSet extends Dataset {
     required this.value,
     String? legend,
     required PdfColor color,
-    this.borderColor = PdfColors.white,
-    this.borderWidth = 1.5,
+    PdfColor? borderColor = PdfColors.white,
+    double borderWidth = 1.5,
     bool? drawBorder,
     this.drawSurface = true,
     this.surfaceOpacity = 1,
@@ -142,6 +142,8 @@ class PieDataSet extends Dataset {
         super(
           legend: legend,
           color: color,
+          borderColor: borderColor,
+          borderWidth: borderWidth,
         );
 
   final num value;
@@ -151,8 +153,6 @@ class PieDataSet extends Dataset {
   late double angleEnd;
 
   final bool drawBorder;
-  final PdfColor? borderColor;
-  final double borderWidth;
 
   final bool drawSurface;
 

@@ -37,6 +37,8 @@ class PointDataSet<T extends PointChartValue> extends Dataset {
     String? legend,
     this.pointSize = 3,
     PdfColor color = PdfColors.blue,
+    PdfColor? borderColor,
+    double borderWidth = 1.5,
     this.drawPoints = true,
     this.shape,
     this.buildValue,
@@ -44,6 +46,8 @@ class PointDataSet<T extends PointChartValue> extends Dataset {
   }) : super(
           legend: legend,
           color: color,
+          borderColor: borderColor,
+          borderWidth: borderWidth,
         );
 
   final List<T> data;