feat: cellColorCallback implemented

lib/src/manager/pluto_grid_state_manager.dart

@@ -79,6 +79,7 @@ class PlutoGridStateChangeNotifier extends PlutoChangeNotifier
     this.onRowsMoved,
     this.onColumnsMoved,
     this.rowColorCallback,
+    this.cellColorCallback,
     this.createHeader,
     this.createFooter,
     PlutoColumnMenuDelegate? columnMenuDelegate,
@@ -142,6 +143,9 @@ class PlutoGridStateChangeNotifier extends PlutoChangeNotifier
   @override
   final PlutoRowColorCallback? rowColorCallback;
 
+  @override
+  final PlutoCellColorCallback? cellColorCallback;
+
   @override
   final CreateHeaderCallBack? createHeader;
 
@@ -223,6 +227,7 @@ class PlutoGridStateManager extends PlutoGridStateChangeNotifier {
     super.onRowsMoved,
     super.onColumnsMoved,
     super.rowColorCallback,
+    super.cellColorCallback,
     super.createHeader,
     super.createFooter,
     super.columnMenuDelegate,

lib/src/manager/state/cell_state.dart

@@ -5,6 +5,8 @@ abstract class ICellState {
   /// currently selected cell.
   PlutoCell? get currentCell;
 
+  PlutoCellColorCallback? get cellColorCallback;
+
   /// The position index value of the currently selected cell.
   PlutoGridCellPosition? get currentCellPosition;
 

lib/src/manager/state/editing_state.dart

@@ -44,6 +44,8 @@ abstract class IEditingState {
     bool callOnChangedEvent = true,
     bool force = false,
     bool notify = true,
+    bool eachChange = false,
+    String? validationError,
   });
 }
 
@@ -212,6 +214,8 @@ mixin EditingState implements IPlutoGridState {
     bool callOnChangedEvent = true,
     bool force = false,
     bool notify = true,
+    bool eachChange = false,
+    String? validationError,
   }) {
     final currentColumn = cell.column;
 
@@ -239,16 +243,28 @@ mixin EditingState implements IPlutoGridState {
     currentRow.setState(PlutoRowState.updated);
 
     cell.value = value;
+    cell.validationError = validationError;
 
     if (callOnChangedEvent == true && onChanged != null) {
-      onChanged!(PlutoGridOnChangedEvent(
-        columnIdx: columnIndex(currentColumn)!,
-        column: currentColumn,
-        rowIdx: refRows.indexOf(currentRow),
-        row: currentRow,
-        value: value,
-        oldValue: oldValue,
-      ));
+      onChanged!(
+        eachChange
+            ? PlutoGridOnEachChangedEvent(
+                columnIdx: columnIndex(currentColumn)!,
+                column: currentColumn,
+                rowIdx: refRows.indexOf(currentRow),
+                row: currentRow,
+                value: value,
+                oldValue: oldValue,
+              )
+            : PlutoGridOnChangedEvent(
+                columnIdx: columnIndex(currentColumn)!,
+                column: currentColumn,
+                rowIdx: refRows.indexOf(currentRow),
+                row: currentRow,
+                value: value,
+                oldValue: oldValue,
+              ),
+      );
     }
 
     notifyListeners(notify, changeCellValue.hashCode);

lib/src/manager/state/layout_state.dart

@@ -440,6 +440,40 @@ mixin LayoutState implements IPlutoGridState {
     notifyListeners(notify, setShowColumnFooter.hashCode);
   }
 
+  bool validate({bool notify = true}) {
+    bool isValid = true;
+    for (var rowElement in refRows.originalList) {
+      for (var cellElement in rowElement.cells.values) {
+        if (cellElement.initialized) {
+          if (cellElement.column.validator != null &&
+              !cellElement.column.hide) {
+            final validationError = cellElement.column.validator?.call(
+              rowElement,
+              cellElement,
+              cellElement.value,
+            );
+
+            changeCellValue(
+              cellElement,
+              cellElement.value,
+              force: true,
+              eachChange: true,
+              callOnChangedEvent: true,
+              validationError: validationError,
+            );
+
+            if (validationError != null) {
+              isValid = false;
+            }
+          }
+        }
+      }
+    }
+
+    notifyListeners(notify, validate.hashCode);
+    return isValid;
+  }
+
   @override
   void setShowColumnFilter(bool flag, {bool notify = true}) {
     if (showColumnFilter == flag) {

lib/src/model/pluto_cell.dart

@@ -10,6 +10,8 @@ class PlutoCell {
 
   final Key _key;
 
+  String? _validationError;
+
   dynamic _value;
 
   dynamic _valueForSorting;
@@ -52,6 +54,18 @@ class PlutoCell {
     return _value;
   }
 
+  String? get validationError {
+    if (_needToApplyFormatOnInit) {
+      _applyFormatOnInit();
+    }
+
+    return _validationError;
+  }
+
+  bool get hasValidationError {
+    return validationError != null && validationError!.trim().isNotEmpty;
+  }
+
   set value(dynamic changed) {
     if (_value == changed) {
       return;
@@ -62,6 +76,13 @@ class PlutoCell {
     _valueForSorting = null;
   }
 
+  set validationError(String? changed) {
+    if (_validationError == changed) {
+      return;
+    }
+    _validationError = changed;
+  }
+
   dynamic get valueForSorting {
     _valueForSorting ??= _getValueForSorting();
 

lib/src/model/pluto_column.dart

@@ -2,6 +2,11 @@ import 'package:flutter/material.dart';
 import 'package:pluto_grid/pluto_grid.dart';
 
 typedef PlutoColumnValueFormatter = String Function(dynamic value);
+typedef PlutoColumnValueValidator = String? Function(
+  PlutoRow row,
+  PlutoCell cell,
+  dynamic value,
+);
 
 typedef PlutoColumnRenderer = Widget Function(
     PlutoColumnRendererContext rendererContext);
@@ -21,6 +26,10 @@ typedef PlutoColumnCheckReadOnly = bool Function(
 );
 
 class PlutoColumn {
+  bool? isFilterApplied;
+
+  Function()? onPressedFilter;
+
   /// A title to be displayed on the screen.
   /// If a titleSpan value is set, the title value is not displayed.
   String title;
@@ -67,6 +76,9 @@ class PlutoColumn {
   /// It takes precedence over defaultCellPadding in PlutoGridConfiguration.
   EdgeInsets? cellPadding;
 
+  /// Customisable cellField padding.
+  EdgeInsets? cellInternalPadding;
+
   /// Text alignment in Cell. (Left, Right, Center)
   PlutoColumnTextAlign textAlign;
 
@@ -192,7 +204,15 @@ class PlutoColumn {
   /// Hide the column.
   bool hide;
 
+  /// Trigger [PlutoGridOnEachChangedEvent] for each character change
+  bool enablePlutoGridOnEachChangedEvent;
+
+  /// Field Validator for the column
+  PlutoColumnValueValidator? validator;
+
   PlutoColumn({
+    this.isFilterApplied,
+    this.onPressedFilter,
     required this.title,
     required this.field,
     required this.type,
@@ -204,6 +224,7 @@ class PlutoColumn {
     this.filterPadding,
     this.titleSpan,
     this.cellPadding,
+    this.cellInternalPadding,
     this.textAlign = PlutoColumnTextAlign.start,
     this.titleTextAlign = PlutoColumnTextAlign.start,
     this.frozen = PlutoColumnFrozen.none,
@@ -226,6 +247,8 @@ class PlutoColumn {
     this.enableAutoEditing = false,
     this.enableEditingMode = true,
     this.hide = false,
+    this.enablePlutoGridOnEachChangedEvent = false,
+    this.validator,
   })  : _key = UniqueKey(),
         _checkReadOnly = checkReadOnly;
 

lib/src/pluto_grid.dart

@@ -45,6 +45,9 @@ typedef CreateFooterCallBack = Widget Function(
 typedef PlutoRowColorCallback = Color Function(
     PlutoRowColorContext rowColorContext);
 
+typedef PlutoCellColorCallback = Color? Function(
+    PlutoCellColorContext cellColorContext);
+
 /// [PlutoGrid] is a widget that receives columns and rows and is expressed as a grid-type UI.
 ///
 /// [PlutoGrid] supports movement and editing with the keyboard,
@@ -72,6 +75,7 @@ class PlutoGrid extends PlutoStatefulWidget {
     this.createFooter,
     this.noRowsWidget,
     this.rowColorCallback,
+    this.cellColorCallback,
     this.columnMenuDelegate,
     this.configuration = const PlutoGridConfiguration(),
     this.notifierFilterResolver,
@@ -291,6 +295,8 @@ class PlutoGrid extends PlutoStatefulWidget {
   /// {@endtemplate}
   final PlutoRowColorCallback? rowColorCallback;
 
+  final PlutoCellColorCallback? cellColorCallback;
+
   /// {@template pluto_grid_property_columnMenuDelegate}
   /// Column menu can be customized.
   ///
@@ -515,6 +521,7 @@ class PlutoGridState extends PlutoStateWithChange<PlutoGrid> {
       onRowsMoved: widget.onRowsMoved,
       onColumnsMoved: widget.onColumnsMoved,
       rowColorCallback: widget.rowColorCallback,
+      cellColorCallback: widget.cellColorCallback,
       createHeader: widget.createHeader,
       createFooter: widget.createFooter,
       columnMenuDelegate: widget.columnMenuDelegate,
@@ -1288,6 +1295,26 @@ class PlutoGridOnChangedEvent {
   }
 }
 
+class PlutoGridOnEachChangedEvent extends PlutoGridOnChangedEvent {
+  const PlutoGridOnEachChangedEvent({
+    required super.columnIdx,
+    required super.column,
+    required super.rowIdx,
+    required super.row,
+    super.value,
+    super.oldValue,
+  });
+
+  @override
+  String toString() {
+    String out = '[PlutoGridOnEachChangedEvent] ';
+    out += 'ColumnIndex : $columnIdx, RowIndex : $rowIdx\n';
+    out += '::: oldValue : $oldValue\n';
+    out += '::: newValue : $value';
+    return out;
+  }
+}
+
 /// This is the argument value of the [PlutoGrid.onSelected] callback
 /// that is called when the [PlutoGrid.mode] value is in select mode.
 ///
@@ -1470,6 +1497,28 @@ class PlutoRowColorContext {
   });
 }
 
+/// Argument of [PlutoGrid.cellColorCallback] callback
+/// to dynamically change the background color of a row.
+class PlutoCellColorContext {
+  final PlutoColumn column;
+
+  final int rowIdx;
+
+  final PlutoRow row;
+
+  final PlutoCell cell;
+
+  final PlutoGridStateManager stateManager;
+
+  PlutoCellColorContext({
+    required this.column,
+    required this.rowIdx,
+    required this.row,
+    required this.cell,
+    required this.stateManager,
+  });
+}
+
 /// Extension class for [ScrollConfiguration.behavior] of [PlutoGrid].
 class PlutoScrollBehavior extends MaterialScrollBehavior {
   const PlutoScrollBehavior({

lib/src/pluto_grid_configuration.dart

@@ -192,6 +192,7 @@ class PlutoGridConfiguration {
 
 class PlutoGridStyleConfig {
   const PlutoGridStyleConfig({
+    this.bodyPadding = EdgeInsets.zero,
     this.enableGridBorderShadow = false,
     this.enableColumnBorderVertical = true,
     this.enableColumnBorderHorizontal = true,
@@ -248,6 +249,7 @@ class PlutoGridStyleConfig {
   });
 
   const PlutoGridStyleConfig.dark({
+    this.bodyPadding = EdgeInsets.zero,
     this.enableGridBorderShadow = false,
     this.enableColumnBorderVertical = true,
     this.enableColumnBorderHorizontal = true,
@@ -303,6 +305,9 @@ class PlutoGridStyleConfig {
     this.gridPopupBorderRadius = BorderRadius.zero,
   });
 
+  /// body padding
+  final EdgeInsets bodyPadding;
+
   /// Enable borderShadow in [PlutoGrid].
   final bool enableGridBorderShadow;