added option to change color of heading row(flutter#132428) (#132728)

Paginated datatable widget cannot give color to table header
 
fixes #132428

---------
Co-authored-by: Hans Muller <hansmuller@google.com>

packages/flutter/lib/src/material/paginated_data_table.dart

@@ -17,6 +17,7 @@ import 'icon_button.dart';
 import 'icons.dart';
 import 'ink_decoration.dart';
 import 'material_localizations.dart';
+import 'material_state.dart';
 import 'progress_indicator.dart';
 import 'theme.dart';
 
@@ -114,6 +115,7 @@ class PaginatedDataTable extends StatefulWidget {
     this.checkboxHorizontalMargin,
     this.controller,
     this.primary,
+    this.headingRowColor,
   }) : assert(actions == null || (header != null)),
        assert(columns.isNotEmpty),
        assert(sortColumnIndex == null || (sortColumnIndex >= 0 && sortColumnIndex < columns.length)),
@@ -288,6 +290,9 @@ class PaginatedDataTable extends StatefulWidget {
   /// {@macro flutter.widgets.scroll_view.primary}
   final bool? primary;
 
+   /// {@macro flutter.material.dataTable.headingRowColor}
+  final MaterialStateProperty<Color?>? headingRowColor;
+
   @override
   PaginatedDataTableState createState() => PaginatedDataTableState();
 }
@@ -595,6 +600,7 @@ class PaginatedDataTableState extends State<PaginatedDataTable> {
                     showCheckboxColumn: widget.showCheckboxColumn,
                     showBottomBorder: true,
                     rows: _getRows(_firstRowIndex, widget.rowsPerPage),
+                    headingRowColor: widget.headingRowColor,
                   ),
                 ),
               ),

packages/flutter/test/material/paginated_data_table_test.dart

@@ -1264,4 +1264,33 @@ void main() {
     final Scrollable footerScrollView = tester.widget(find.byType(Scrollable).last);
     expect(footerScrollView.controller, null);
   });
+
+  testWidgets('PaginatedDataTable custom heading row color', (WidgetTester tester) async {
+    const MaterialStateProperty<Color> headingRowColor = MaterialStatePropertyAll<Color>(Color(0xffFF0000));
+    final TestDataSource source = TestDataSource();
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: PaginatedDataTable(
+            primary: true,
+            header: const Text('Test table'),
+            source: source,
+            rowsPerPage: 2,
+            headingRowColor: headingRowColor,
+            columns: const <DataColumn>[
+              DataColumn(label: Text('Name')),
+              DataColumn(label: Text('Calories'), numeric: true),
+              DataColumn(label: Text('Generation')),
+            ],
+          ),
+        ),
+      )
+    );
+
+    final Table table = tester.widget(find.byType(Table));
+    final TableRow tableRow = table.children[0];
+    final BoxDecoration tableRowBoxDecoration = tableRow.decoration! as BoxDecoration;
+    expect(tableRowBoxDecoration.color, headingRowColor.resolve(<MaterialState>{}));
+  });
 }