Added ability to customize sort icon color (#354)

Looks good, thx!

Author: plchekspend

lib/src/async_paginated_data_table_2.dart

@@ -326,6 +326,7 @@ class AsyncPaginatedDataTable2 extends PaginatedDataTable2 {
     super.sortAscending = true,
     super.sortArrowAnimationDuration = const Duration(milliseconds: 150),
     super.sortArrowIcon = Icons.arrow_upward,
+    super.sortArrowIconColor,
     super.sortArrowAlwaysVisible,
     super.sortArrowBuilder,
     super.onSelectAll,

lib/src/data_table_2.dart

@@ -185,6 +185,7 @@ class DataTable2 extends DataTable {
     this.lmRatio = 1.2,
     this.sortArrowAnimationDuration = const Duration(milliseconds: 150),
     this.sortArrowIcon = Icons.arrow_upward,
+    this.sortArrowIconColor,
     this.sortArrowBuilder,
     this.headingRowDecoration,
     required super.rows,
@@ -234,6 +235,9 @@ class DataTable2 extends DataTable {
   /// When set always overrides/preceeds default arrow icons.
   final IconData sortArrowIcon;
 
+  /// When set always overrides/preceeds default arrow icon color.
+  final Color? sortArrowIconColor;
+
   /// A builder for the sort arrow widget. Can be used in combination with [sortArrowAlwaysVisible] for a custom
   /// sort arrow behavior. If this is used [sortArrowIcon], [sortArrowAnimationDuration] will be ignored.
   final Widget? Function(bool ascending, bool sorted)? sortArrowBuilder;
@@ -435,6 +439,7 @@ class DataTable2 extends DataTable {
                 up: sorted ? ascending : null,
                 duration: sortArrowAnimationDuration,
                 sortArrowIcon: sortArrowIcon,
+                sortArrowIconColor: sortArrowIconColor,
               ),
           const SizedBox(width: _sortArrowPadding),
         ],
@@ -1444,6 +1449,7 @@ class _SortArrow extends StatefulWidget {
     required this.up,
     required this.duration,
     required this.sortArrowIcon,
+    this.sortArrowIconColor,
   });
 
   final bool visible;
@@ -1454,6 +1460,8 @@ class _SortArrow extends StatefulWidget {
 
   final IconData sortArrowIcon;
 
+  final Color? sortArrowIconColor;
+
   @override
   _SortArrowState createState() => _SortArrowState();
 }
@@ -1558,6 +1566,7 @@ class _SortArrowState extends State<_SortArrow> with TickerProviderStateMixin {
         alignment: Alignment.center,
         child: Icon(
           widget.sortArrowIcon,
+          color: widget.sortArrowIconColor,
           size: _arrowIconSize,
         ),
       ),

lib/src/paginated_data_table_2.dart

@@ -166,6 +166,7 @@ class PaginatedDataTable2 extends StatefulWidget {
     this.sortAscending = true,
     this.sortArrowAnimationDuration = const Duration(milliseconds: 150),
     this.sortArrowIcon = Icons.arrow_upward,
+    this.sortArrowIconColor,
     this.sortArrowBuilder,
     this.sortArrowAlwaysVisible = false,
     this.onSelectAll,
@@ -272,6 +273,9 @@ class PaginatedDataTable2 extends StatefulWidget {
   /// If not set, the default icon is [Icons.arrow_upward]
   final IconData sortArrowIcon;
 
+  /// You can customize the icon color by setting [sortArrowIconColor].
+  final Color? sortArrowIconColor;
+
   /// This used in combination with [sortArrowBuilder] to create a custom sort arrow widget behavior.
   /// If this is set to true the [sortArrowBuilder] will run for all columns that have [onSort] != null.
   final bool sortArrowAlwaysVisible;
@@ -772,6 +776,7 @@ class PaginatedDataTable2State extends State<PaginatedDataTable2> {
           sortColumnIndex: widget.sortColumnIndex,
           sortAscending: widget.sortAscending,
           sortArrowIcon: widget.sortArrowIcon,
+          sortArrowIconColor: widget.sortArrowIconColor,
           sortArrowAnimationDuration: widget.sortArrowAnimationDuration,
           sortArrowBuilder: widget.sortArrowBuilder,
           onSelectAll: widget.onSelectAll,