Add helper functions to replace text styles and cell content

@@ -24,6 +24,10 @@ import 'text_style.dart';
 import 'theme.dart';
 import 'theme.dart';
 import 'widget.dart';
 import 'widget.dart';
 
 
+typedef OnCell = Widget? Function(int index, dynamic data, int rowNum);
+typedef OnCellTextStyle = TextStyle? Function(
+    int index, dynamic data, int rowNum);
+
 mixin TableHelper {
 mixin TableHelper {
   static TextAlign _textAlign(Alignment align) {
   static TextAlign _textAlign(Alignment align) {
     if (align.x == 0) {
     if (align.x == 0) {
@@ -71,6 +75,8 @@ mixin TableHelper {
     BoxDecoration? oddRowDecoration,
     BoxDecoration? oddRowDecoration,
     TextDirection? headerDirection,
     TextDirection? headerDirection,
     TextDirection? tableDirection,
     TextDirection? tableDirection,
+    OnCell? cellBuilder,
+    OnCellTextStyle? textStyleBuilder,
   }) {
   }) {
     assert(headerCount >= 0);
     assert(headerCount >= 0);
 
 
@@ -161,14 +167,17 @@ mixin TableHelper {
                   : cellDecoration(tableRow.length, cell, rowNum),
                   : cellDecoration(tableRow.length, cell, rowNum),
               child: cell is Widget
               child: cell is Widget
                   ? cell
                   ? cell
-                  : Text(
-                      cellFormat == null
-                          ? cell.toString()
-                          : cellFormat(tableRow.length, cell),
-                      style: isOdd ? oddCellStyle : cellStyle,
-                      textAlign: _textAlign(align.resolve(textDirection)),
-                      textDirection: tableDirection,
-                    ),
+                  : cellBuilder?.call(tableRow.length, cell, rowNum) ??
+                      Text(
+                        cellFormat == null
+                            ? cell.toString()
+                            : cellFormat(tableRow.length, cell),
+                        style: textStyleBuilder?.call(
+                                tableRow.length, cell, rowNum) ??
+                            (isOdd ? oddCellStyle : cellStyle),
+                        textAlign: _textAlign(align.resolve(textDirection)),
+                        textDirection: tableDirection,
+                      ),
             ),
             ),
           );
           );
         }
         }