Moved the new sample changes

Author: Yuvaraj-Gajaraj

README.md

@@ -82,15 +82,12 @@ Explore the full capabilities of our Flutter widgets on your device by installin
 
 <p align="center">
   <a href="https://play.google.com/store/apps/details?id=com.syncfusion.flutter.examples"><img src="https://cdn.syncfusion.com/content/images/FTControl/google-play-store.png"/></a>
-  <a href="https://apps.apple.com/us/app/syncfusion-flutter-ui-widgets/id1475231341"><img src="https://cdn.syncfusion.com/content/images/FTControl/ios-store.png"/></a>
-  <a href="https://flutter.syncfusion.com"><img src="https://cdn.syncfusion.com/content/images/FTControl/web-sample-browser.png"/></a> 
+  <a href="https://flutter.syncfusion.com"><img src="https://cdn.syncfusion.com/content/images/FTControl/web-sample-browser.png"/></a>
+  <a href="https://www.microsoft.com/en-us/p/syncfusion-flutter-gallery/9nhnbwcsf85d?activetab=pivot:overviewtab"><img src="https://cdn.syncfusion.com/content/images/FTControl/windows-store.png"/></a> 
 </p>
 <p align="center">
-  <a href="https://www.microsoft.com/en-us/p/syncfusion-flutter-gallery/9nhnbwcsf85d?activetab=pivot:overviewtab"><img src="https://cdn.syncfusion.com/content/images/FTControl/windows-store.png"/></a> 
   <a href="https://install.appcenter.ms/orgs/syncfusion-demos/apps/syncfusion-flutter-gallery/distribution_groups/release"><img src="https://cdn.syncfusion.com/content/images/FTControl/macos-app-center.png"/></a>
   <a href="https://snapcraft.io/syncfusion-flutter-gallery"><img src="https://cdn.syncfusion.com/content/images/FTControl/snap-store.png"/></a>
-</p>
-<p align="center">
   <a href="https://github.com/syncfusion/flutter-examples"><img src="https://cdn.syncfusion.com/content/images/FTControl/github-samples.png"/></a>
 </p>
 

analysis_options.yaml

@@ -10,3 +10,5 @@ analyzer:
     avoid_bool_literals_in_conditional_expressions: ignore
     library_private_types_in_public_api: ignore
     prefer_interpolation_to_compose_strings: ignore
+    always_specify_types: ignore
+

assets/europe.json

@@ -2600,6 +2600,26 @@
               }
             ]
           },
+          {
+            "type": "child",
+            "title": "Grouping",
+            "subItems": [
+              {
+                "type": "sample",
+                "title": "Grouping",
+                "key": "datagrid_grouping",
+                "codeLink": "https://github.com/syncfusion/flutter-examples/blob/master/lib/samples/datagrid/grouping/datagrid_grouping.dart",
+                "needsPropertyPanel": false
+              },
+              {
+                "type": "sample",
+                "title": "Custom Grouping",
+                "key": "datagrid_custom_grouping",
+                "codeLink": "https://github.com/syncfusion/flutter-examples/blob/master/lib/samples/datagrid/grouping/datagrid_custom_grouping",
+                "needsPropertyPanel": false
+              }
+            ]
+          },
           {
             "type": "child",
             "title": "Selection",
@@ -2627,7 +2647,6 @@
               }
             ]
           },
-
           {
             "type": "child",
             "title": "Freeze Panes",
@@ -3610,4 +3629,4 @@
       }
     ]
   }
-]
+]

assets/germany.json

@@ -1,5 +1,7 @@
 /// Package import
 import 'package:flutter/material.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:syncfusion_localizations/syncfusion_localizations.dart';
 
 /// Local import
 import 'model.dart';
@@ -11,7 +13,7 @@ abstract class SampleView extends StatefulWidget {
 }
 
 /// Base class of the sample's state class
-abstract class SampleViewState extends State<SampleView> {
+abstract class SampleViewState<T extends SampleView> extends State<T> {
   /// Holds the SampleModel information
   late SampleModel model;
 
@@ -25,9 +27,8 @@ abstract class SampleViewState extends State<SampleView> {
     super.initState();
   }
 
-  @override
-
   /// Must call super.
+  @override
   void dispose() {
     model.isCardView = true;
     super.dispose();
@@ -39,6 +40,219 @@ abstract class SampleViewState extends State<SampleView> {
   }
 }
 
+/// Base class of the localization sample's stateful widget class
+class LocalizationSampleView extends SampleView {
+  /// base class constructor of sample's stateful widget class
+  const LocalizationSampleView({Key? key}) : super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => LocalizationSampleViewState();
+}
+
+/// Base class of the localization sample's state class
+class LocalizationSampleViewState<T extends LocalizationSampleView>
+    extends SampleViewState<T> {
+  late List<Locale> _supportedLocales;
+
+  @override
+  void initState() {
+    if (this is! DirectionalitySampleViewState) {
+      _supportedLocales = <Locale>[
+        const Locale('ar', 'AE'),
+        const Locale('en', 'US'),
+        const Locale('es', 'ES'),
+        const Locale('fr', 'FR'),
+        const Locale('zh', 'CN')
+      ];
+    } else {
+      _supportedLocales = <Locale>[
+        const Locale('ar', 'AE'),
+        const Locale('en', 'US'),
+      ];
+    }
+
+    super.initState();
+  }
+
+  /// Add the localization selection widget.
+  Widget localizationSelectorWidget(BuildContext context) {
+    final double screenWidth =
+        model.isWebFullView ? 250 : MediaQuery.of(context).size.width;
+    final double dropDownWidth = 0.6 * screenWidth;
+    return StatefulBuilder(
+        builder: (BuildContext context, StateSetter stateSetter) {
+      return Row(
+        children: <Widget>[
+          Text(this is DirectionalitySampleViewState ? 'Language' : 'Locale',
+              softWrap: false,
+              style: TextStyle(
+                fontSize: 16,
+                color: model.textColor,
+              )),
+          Container(
+              padding: const EdgeInsets.fromLTRB(50, 0, 0, 0),
+              width: dropDownWidth,
+              child: DropdownButton<Locale>(
+                  focusColor: Colors.transparent,
+                  isExpanded: true,
+                  underline:
+                      Container(color: const Color(0xFFBDBDBD), height: 1),
+                  value: model.locale,
+                  items: _supportedLocales.map((Locale value) {
+                    String localeString = value.toString();
+                    if (this is DirectionalitySampleViewState) {
+                      localeString =
+                          (localeString == 'ar_AE') ? 'Arabic' : 'English';
+                    } else {
+                      localeString = localeString.substring(0, 2) +
+                          '-' +
+                          localeString.substring(3, 5);
+                    }
+
+                    return DropdownMenuItem<Locale>(
+                        value: value,
+                        child: Text(localeString,
+                            style: TextStyle(color: model.textColor)));
+                  }).toList(),
+                  onChanged: (Locale? value) {
+                    if (model.locale != value) {
+                      setState(() {
+                        stateSetter(() {
+                          model.isInitialRender = false;
+                          model.locale = value;
+                          if (this is! DirectionalitySampleViewState) {
+                            if (model.locale == const Locale('ar', 'AE')) {
+                              model.textDirection = TextDirection.rtl;
+                            } else {
+                              model.textDirection = TextDirection.ltr;
+                            }
+                          }
+                        });
+                      });
+                    }
+                  })),
+        ],
+      );
+    });
+  }
+
+  Widget _buildDirectionalityWidget() {
+    return Localizations(
+        locale: model.locale!,
+        delegates: const [
+          GlobalMaterialLocalizations.delegate,
+          GlobalWidgetsLocalizations.delegate,
+          GlobalCupertinoLocalizations.delegate,
+          SfGlobalLocalizations.delegate
+        ],
+        child: Directionality(
+            textDirection: model.textDirection,
+            child: buildSample(context) ?? Container()));
+  }
+
+  /// Method to get the widget's color based on the widget state
+  Color? getColor(Set<MaterialState> states) {
+    const Set<MaterialState> interactiveStates = <MaterialState>{
+      MaterialState.pressed,
+      MaterialState.selected,
+    };
+    if (states.any(interactiveStates.contains)) {
+      return model.backgroundColor;
+    }
+    return null;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return _buildDirectionalityWidget();
+  }
+
+  /// Get the settings panel content.
+  Widget? buildSample(BuildContext context) {
+    return null;
+  }
+
+  /// Must call super.
+  @override
+  void dispose() {
+    super.dispose();
+  }
+}
+
+/// Base class of the directionality sample's stateful widget class
+class DirectionalitySampleView extends LocalizationSampleView {
+  /// base class constructor of sample's stateful widget class
+  const DirectionalitySampleView({Key? key}) : super(key: key);
+}
+
+/// Base class of the directionality sample's state class
+class DirectionalitySampleViewState<T extends DirectionalitySampleView>
+    extends LocalizationSampleViewState<T> {
+  final List<TextDirection> _supportedTextDirection = <TextDirection>[
+    TextDirection.ltr,
+    TextDirection.rtl,
+  ];
+
+  /// Must call super.
+  @override
+  void dispose() {
+    super.dispose();
+  }
+
+  /// Close all overlay when property panel is opened. Implemented for PdfViewer
+  /// RTL sample.
+  void closeAllOverlay() {}
+
+  /// Add the localization selection widget.
+  Widget textDirectionSelectorWidget(BuildContext context) {
+    final double screenWidth =
+        model.isWebFullView ? 250 : MediaQuery.of(context).size.width;
+    closeAllOverlay();
+    final double dropDownWidth = 0.6 * screenWidth;
+    return StatefulBuilder(
+        builder: (BuildContext context, StateSetter stateSetter) {
+      return Row(
+        children: <Widget>[
+          Text('Rendering\nDirection',
+              maxLines: 2,
+              textAlign: TextAlign.left,
+              softWrap: false,
+              style: TextStyle(
+                fontSize: 16,
+                color: model.textColor,
+              )),
+          Container(
+              padding: const EdgeInsets.fromLTRB(50, 0, 0, 0),
+              width: dropDownWidth,
+              child: DropdownButton<TextDirection>(
+                  focusColor: Colors.transparent,
+                  isExpanded: true,
+                  underline:
+                      Container(color: const Color(0xFFBDBDBD), height: 1),
+                  value: model.textDirection,
+                  items: _supportedTextDirection.map((TextDirection value) {
+                    return DropdownMenuItem<TextDirection>(
+                        value: value,
+                        child: Text(
+                            value.toString().split('.')[1].toUpperCase(),
+                            style: TextStyle(color: model.textColor)));
+                  }).toList(),
+                  onChanged: (TextDirection? value) {
+                    if (model.textDirection != value) {
+                      setState(() {
+                        stateSetter(() {
+                          model.isInitialRender = false;
+                          model.textDirection = value!;
+                        });
+                      });
+                    }
+                  })),
+        ],
+      );
+    });
+  }
+}
+
 ///Chart sample data
 class ChartSampleData {
   /// Holds the datapoint values like x, y, etc.,