HTKC Utils Package is a reusable Flutter package that provides a collection of utility functions, classes, and widgets that can be used in any Flutter project. It aims to simplify common tasks and enhance productivity by encapsulating frequently used functionalities into a single package.

Features

Validation Utilities: The package includes various utility functions for validating user inputs, such as email addresses, phone numbers, passwords, etc. These functions can be used to ensure that the user provides valid and correctly formatted data.

Custom Widgets: It provides a set of pre-built custom widgets that can be easily integrated into any Flutter project. These widgets are designed to enhance the user interface and provide common functionalities, such as a loading spinner, toast messages, snackbar notifications, etc.

File and Image Handling: The package includes helper classes and functions for file and image handling. It provides methods for selecting images from the device's gallery, capturing images using the camera, compressing and resizing images, and saving files locally or remotely. These utilities simplify working with files and images in Flutter projects.

Getting started

Create your project and follow below instructions.

Usage

Example (https://github.com/ChandraHemant/htkc_utils/blob/main/example/)

To use this package : *add dependency to your pubspec.yaml file

   dependencies:
     flutter:
       sdk: flutter
     htkc_utils: 

Add to your dart file

import 'package:htkc_utils/htkc_utils.dart';

void main() async {
  runApp(const HTKCExample());
}

class HTKCExample extends StatefulWidget {
  const HTKCExample({Key? key}) : super(key: key);

  @override
  State<HTKCExample> createState() => _HTKCExampleState();
}

class _HTKCExampleState extends State<HTKCExample> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: HcCustomAppBar(
          title: 'HTKC Example',
          bgColor: Colors.white,
          action: true,
          actionTitle: '+ New',
          isDialog: true,
          actionWidget: const HcCustomAlertDialog(child: Center(child: Text('Action Widget Clicked'))),
          child: Card(
            clipBehavior: Clip.antiAlias,
            child: Wrap(
              direction: Axis.horizontal,
              spacing: 8.0, // gap between adjacent chips
              runSpacing: 4.0, // gap between lines
              children: <Widget>[
                Chip(
                  avatar: CircleAvatar(
                      backgroundColor: Colors.blue.shade900, child: Text('AH')),
                  label: Text('Hamilton'),
                ),
                Chip(
                  avatar: CircleAvatar(
                      backgroundColor: Colors.blue.shade900, child: Text('ML')),
                  label: Text('Lafayette'),
                ),
                Chip(
                  avatar: CircleAvatar(
                      backgroundColor: Colors.blue.shade900, child: Text('HM')),
                  label: Text('Mulligan'),
                ),
                Chip(
                  avatar: CircleAvatar(
                      backgroundColor: Colors.blue.shade900, child: Text('JL')),
                  label: Text('Laurens'),
                ),
              ],
            ),
          ),
        ));
  }
}

New Version Upgrade Dialog

import 'package:htkc_utils/htkc_utils.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // Only call clearSavedSettings() during testing to reset internal values.
  await HcUpgradeNewVersion.clearSavedSettings(); // REMOVE this for release builds

  // On Android, the default behavior will be to use the Google Play Store
  // version of the app.
  // On iOS, the default behavior will be to use the App Store version of
  // the app, so update the Bundle Identifier in example/ios/Runner with a
  // valid identifier already in the App Store.
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Upgrader Example',
      home: HcUpgradeAlert(
          child: Scaffold(
            appBar: AppBar(title: Text('Upgrader Example')),
            body: Center(child: Text('Checking...')),
          )),
    );
  }
}

Dropdown Search

import 'package:example/dropdown_search/user_model.dart';
import 'package:htkc_utils/dropdown_search/hc_dropdown_search_form_field.dart';
import 'package:htkc_utils/htkc_utils.dart';
import 'package:dio/dio.dart';

class HcAdvanceExample extends StatefulWidget {
  final List<String> suggestions;

  HcAdvanceExample({required this.suggestions});

  @override
  _HcAdvanceExampleState createState() => _HcAdvanceExampleState();
}

class _HcAdvanceExampleState extends State<HcAdvanceExample> {
  final _formKey = GlobalKey<FormState>();
  final _openDropDownProgKey = GlobalKey<HcDropdownSearchState<int>>();
  final _multiKey = GlobalKey<HcDropdownSearchState<String>>();
  final _popupBuilderKey = GlobalKey<HcDropdownSearchState<String>>();
  final _popupCustomValidationKey = GlobalKey<HcDropdownSearchState<int>>();
  final _userEditTextController = TextEditingController(text: 'Mrs');
  final myKey = GlobalKey<HcDropdownSearchState<MultiLevelString>>();
  final List<MultiLevelString> myItems = [
    MultiLevelString(level1: "1"),
    MultiLevelString(level1: "2"),
    MultiLevelString(
      level1: "3",
      subLevel: [
        MultiLevelString(level1: "sub3-1"),
        MultiLevelString(level1: "sub3-2"),
      ],
    ),
    MultiLevelString(level1: "4")
  ];
  bool? _popupBuilderSelection = false;

  @override
  Widget build(BuildContext context) {
    void _handleCheckBoxState({bool updateState = true}) {
      var selectedItem = _popupBuilderKey.currentState?.popupGetSelectedItems ?? [];
      var isAllSelected = _popupBuilderKey.currentState?.popupIsAllItemSelected ?? false;
      _popupBuilderSelection = selectedItem.isEmpty ? false : (isAllSelected ? true : null);

      if (updateState) setState(() {});
    }

    _handleCheckBoxState(updateState: false);

    return Scaffold(
      appBar: AppBar(title: Text("DropdownSearch Demo")),
      body: Padding(
        padding: const EdgeInsets.all(25),
        child: Form(
          key: _formKey,
          autovalidateMode: AutovalidateMode.onUserInteraction,
          child: ListView(
            padding: EdgeInsets.all(4),
            children: <Widget>[
              ///************************[simple examples for single and multi selection]************///
              Text("[simple examples for single and multi selection]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: [1, 2, 3, 4, 5, 6, 7],
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>.multiSelection(
                      clearButtonProps: HcClearButtonProps(isVisible: true),
                      items: [1, 2, 3, 4, 5, 6, 7],
                    ),
                  )
                ],
              ),

              ///************************[simple examples for each mode]*************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[simple examples for each mode]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: [1, 2, 3, 4, 5, 6, 7],
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>.multiSelection(
                      key: _popupCustomValidationKey,
                      items: [1, 2, 3, 4, 5, 6, 7],
                      popupProps: HcPopupPropsMultiSelection.dialog(
                        validationWidgetBuilder: (ctx, selectedItems) {
                          return Container(
                            color: Colors.blue[200],
                            height: 56,
                            child: Align(
                              alignment: Alignment.center,
                              child: MaterialButton(
                                child: Text('OK'),
                                onPressed: () {
                                  _popupCustomValidationKey.currentState?.popupOnValidate();
                                },
                              ),
                            ),
                          );
                        },
                      ),
                    ),
                  )
                ],
              ),
              Padding(padding: EdgeInsets.all(4)),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: [1, 2, 3, 4, 5, 6, 7],
                      dropdownDecoratorProps: HcDropDownDecoratorProps(
                        dropdownSearchDecoration: InputDecoration(
                          labelText: "BottomSheet mode",
                          hintText: "Select an Int",
                        ),
                      ),
                      popupProps: PopupProps.bottomSheet(
                          bottomSheetProps: BottomSheetProps(elevation: 16, backgroundColor: Color(0xFFAADCEE))),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: [1, 2, 3, 4, 5, 6, 7],
                      dropdownDecoratorProps: HcDropDownDecoratorProps(
                        dropdownSearchDecoration: InputDecoration(
                          labelText: "Modal mode",
                          hintText: "Select an Int",
                          filled: true,
                        ),
                      ),
                      popupProps: HcPopupPropsMultiSelection.modalBottomSheet(
                        disabledItemFn: (int i) => i <= 3,
                      ),
                    ),
                  )
                ],
              ),

              ///************************[Favorites examples]**********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[Favorites examples]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<UserModel>(
                      asyncItems: (filter) => getData(filter),
                      compareFn: (i, s) => i.isEqual(s),
                      popupProps: HcPopupPropsMultiSelection.modalBottomSheet(
                        isFilterOnline: true,
                        showSelectedItems: true,
                        showSearchBox: true,
                        itemBuilder: _customPopupItemBuilderExample2,
                        favoriteItemProps: FavoriteItemProps(
                          showFavoriteItems: true,
                          favoriteItems: (us) {
                            return us.where((e) => e.name.contains("Mrs")).toList();
                          },
                        ),
                      ),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<UserModel>.multiSelection(
                      asyncItems: (filter) => getData(filter),
                      compareFn: (i, s) => i.isEqual(s),
                      popupProps: HcPopupPropsMultiSelection.modalBottomSheet(
                        showSearchBox: true,
                        itemBuilder: _customPopupItemBuilderExample2,
                        favoriteItemProps: FavoriteItemProps(
                          showFavoriteItems: true,
                          favoriteItems: (us) {
                            return us.where((e) => e.name.contains("Mrs")).toList();
                          },
                          favoriteItemBuilder: (context, item, isSelected) {
                            return Container(
                              padding: EdgeInsets.symmetric(horizontal: 8, vertical: 6),
                              decoration: BoxDecoration(
                                  border: Border.all(color: Colors.grey),
                                  borderRadius: BorderRadius.circular(10),
                                  color: Colors.grey[100]),
                              child: Row(
                                children: [
                                  Text(
                                    "${item.name}",
                                    textAlign: TextAlign.center,
                                    style: TextStyle(color: Colors.indigo),
                                  ),
                                  Padding(padding: EdgeInsets.only(left: 8)),
                                  isSelected ? Icon(Icons.check_box_outlined) : SizedBox.shrink(),
                                ],
                              ),
                            );
                          },
                        ),
                      ),
                    ),
                  ),
                ],
              ),

              ///************************[validation examples]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[validation examples]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: [1, 2, 3, 4, 5, 6, 7],
                      autoValidateMode: AutovalidateMode.onUserInteraction,
                      validator: (int? i) {
                        if (i == null)
                          return 'required filed';
                        else if (i >= 5) return 'value should be < 5';
                        return null;
                      },
                      clearButtonProps: HcClearButtonProps(isVisible: true),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>.multiSelection(
                      items: [1, 2, 3, 4, 5, 6, 7],
                      validator: (List<int>? items) {
                        if (items == null || items.isEmpty)
                          return 'required filed';
                        else if (items.length > 3) return 'only 1 to 3 items are allowed';
                        return null;
                      },
                    ),
                  )
                ],
              ),

              ///************************[custom popup background examples]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[custom popup background examples]"),
              Divider(),
              HcDropdownSearch<String>(
                items: List.generate(5, (index) => "$index"),
                popupProps: PopupProps.menu(
                  fit: FlexFit.loose,
                  menuProps: MenuProps(
                    backgroundColor: Colors.transparent,
                    elevation: 0,
                  ),
                  containerBuilder: (ctx, popupWidget) {
                    return Column(
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.end,
                      children: [
                        Padding(
                          padding: const EdgeInsets.only(right: 12),
                          child: Image.asset(
                            'assets/images/arrow-up.png',
                            color: Color(0xFF2F772A),
                            height: 12,
                          ),
                        ),
                        Flexible(
                          child: Container(
                            child: popupWidget,
                            color: Color(0xFF2F772A),
                          ),
                        ),
                      ],
                    );
                  },
                ),
              ),
              Padding(padding: EdgeInsets.all(8)),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<String>.multiSelection(
                      key: _popupBuilderKey,
                      items: List.generate(30, (index) => "$index"),
                      popupProps: HcPopupPropsMultiSelection.dialog(
                        onItemAdded: (l, s) => _handleCheckBoxState(),
                        onItemRemoved: (l, s) => _handleCheckBoxState(),
                        showSearchBox: true,
                        containerBuilder: (ctx, popupWidget) {
                          return _CheckBoxWidget(
                            child: popupWidget,
                            isSelected: _popupBuilderSelection,
                            onChanged: (v) {
                              if (v == true)
                                _popupBuilderKey.currentState!.popupSelectAllItems();
                              else if (v == false) _popupBuilderKey.currentState!.popupDeselectAllItems();
                              _handleCheckBoxState();
                            },
                          );
                        },
                      ),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<String>.multiSelection(
                      key: _multiKey,
                      items: List.generate(30, (index) => "$index"),
                      popupProps: HcPopupPropsMultiSelection.dialog(
                        onItemAdded: (l, s) => _handleCheckBoxState(),
                        onItemRemoved: (l, s) => _handleCheckBoxState(),
                        showSearchBox: true,
                        containerBuilder: (ctx, popupWidget) {
                          return Column(
                            children: [
                              Row(
                                mainAxisSize: MainAxisSize.min,
                                mainAxisAlignment: MainAxisAlignment.end,
                                children: [
                                  Padding(
                                    padding: EdgeInsets.all(8),
                                    child: OutlinedButton(
                                      onPressed: () {
                                        // How should I unselect all items in the list?
                                        _multiKey.currentState?.closeDropDownSearch();
                                      },
                                      child: const Text('Cancel'),
                                    ),
                                  ),
                                  Padding(
                                    padding: EdgeInsets.all(8),
                                    child: OutlinedButton(
                                      onPressed: () {
                                        // How should I select all items in the list?
                                        _multiKey.currentState?.popupSelectAllItems();
                                      },
                                      child: const Text('All'),
                                    ),
                                  ),
                                  Padding(
                                    padding: EdgeInsets.all(8),
                                    child: OutlinedButton(
                                      onPressed: () {
                                        // How should I unselect all items in the list?
                                        _multiKey.currentState?.popupDeselectAllItems();
                                      },
                                      child: const Text('None'),
                                    ),
                                  ),
                                ],
                              ),
                              Expanded(child: popupWidget),
                            ],
                          );
                        },
                      ),
                    ),
                  ),
                ],
              ),

              ///************************[dropdownBuilder examples]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[DropDownSearch builder examples]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<UserModel>.multiSelection(
                      asyncItems: (String? filter) => getData(filter),
                      clearButtonProps: HcClearButtonProps(isVisible: true),
                      popupProps: HcPopupPropsMultiSelection.modalBottomSheet(
                        showSelectedItems: true,
                        isFilterOnline: true,
                        itemBuilder: _customPopupItemBuilderExample2,
                        showSearchBox: true,
                        searchFieldProps: TextFieldProps(
                          controller: _userEditTextController,
                          decoration: InputDecoration(
                            suffixIcon: IconButton(
                              icon: Icon(Icons.clear),
                              onPressed: () {
                                _userEditTextController.clear();
                              },
                            ),
                          ),
                        ),
                      ),
                      compareFn: (item, selectedItem) => item.id == selectedItem.id,
                      dropdownDecoratorProps: HcDropDownDecoratorProps(
                        dropdownSearchDecoration: InputDecoration(
                          labelText: 'Users *',
                          filled: true,
                          fillColor: Theme.of(context).inputDecorationTheme.fillColor,
                        ),
                      ),
                      dropdownBuilder: _customDropDownExampleMultiSelection,
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<UserModel>(
                      asyncItems: (String? filter) => getData(filter),
                      popupProps: HcPopupPropsMultiSelection.modalBottomSheet(
                        showSelectedItems: true,
                        itemBuilder: _customPopupItemBuilderExample2,
                        showSearchBox: true,
                      ),
                      compareFn: (item, sItem) => item.id == sItem.id,
                      dropdownDecoratorProps: HcDropDownDecoratorProps(
                        dropdownSearchDecoration: InputDecoration(
                          labelText: 'User *',
                          filled: true,
                          fillColor: Theme.of(context).inputDecorationTheme.fillColor,
                        ),
                      ),
                    ),
                  ),
                ],
              ),

              ///************************[Dynamic height depending on items number]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[popup dynamic height examples]"),
              Divider(),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: List.generate(50, (i) => i),
                      popupProps: PopupProps.menu(
                        showSearchBox: true,
                        title: Text('default fit'),
                      ),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: List.generate(50, (i) => i),
                      popupProps: PopupProps.menu(
                        title: Text('With fit to loose and no constraints'),
                        showSearchBox: true,
                        fit: FlexFit.loose,
                        //comment this if you want that the items do not takes all available height
                        constraints: BoxConstraints.tightFor(),
                      ),
                    ),
                  )
                ],
              ),
              Padding(padding: EdgeInsets.all(4)),
              Row(
                children: [
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: List.generate(50, (i) => i),
                      popupProps: PopupProps.menu(
                        showSearchBox: true,
                        fit: FlexFit.loose,
                        title: Text('fit to a specific max height'),
                        constraints: BoxConstraints(maxHeight: 300),
                      ),
                    ),
                  ),
                  Padding(padding: EdgeInsets.all(4)),
                  Expanded(
                    child: HcDropdownSearch<int>(
                      items: List.generate(50, (i) => i),
                      popupProps: PopupProps.menu(
                        title: Text('fit to a specific width and height'),
                        showSearchBox: true,
                        fit: FlexFit.loose,
                        constraints: BoxConstraints.tightFor(
                          width: 300,
                          height: 300,
                        ),
                      ),
                    ),
                  )
                ],
              ),

              ///************************[Handle dropdown programmatically]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[handle dropdown programmatically]"),
              Divider(),
              HcDropdownSearch<int>(
                key: _openDropDownProgKey,
                items: [1, 2, 3],
              ),
              Padding(padding: EdgeInsets.all(4)),
              ElevatedButton(
                onPressed: () {
                  _openDropDownProgKey.currentState?.changeSelectedItem(100);
                },
                child: Text('set to 100'),
              ),
              Padding(padding: EdgeInsets.all(4)),
              ElevatedButton(
                onPressed: () {
                  _openDropDownProgKey.currentState?.openDropDownSearch();
                },
                child: Text('open popup'),
              ),

              ///************************[multiLevel items example]********************************///
              Padding(padding: EdgeInsets.all(8)),
              Text("[multiLevel items example]"),
              Divider(),
              HcDropdownSearch<MultiLevelString>(
                key: myKey,
                items: myItems,
                compareFn: (i1, i2) => i1.level1 == i2.level1,
                popupProps: PopupProps.menu(
                  showSelectedItems: true,
                  interceptCallBacks: true, //important line
                  itemBuilder: (ctx, item, isSelected) {
                    return ListTile(
                      selected: isSelected,
                      title: Text(item.level1),
                      trailing: item.subLevel.isEmpty
                          ? null
                          : (item.isExpanded
                          ? IconButton(
                        icon: Icon(Icons.arrow_drop_down),
                        onPressed: () {
                          item.isExpanded = !item.isExpanded;
                          myKey.currentState?.updatePopupState();
                        },
                      )
                          : IconButton(
                        icon: Icon(Icons.arrow_right),
                        onPressed: () {
                          item.isExpanded = !item.isExpanded;
                          myKey.currentState?.updatePopupState();
                        },
                      )),
                      subtitle: item.subLevel.isNotEmpty && item.isExpanded
                          ? Container(
                        height: item.subLevel.length * 50,
                        child: ListView(
                          children: item.subLevel
                              .map(
                                (e) => ListTile(
                              selected: myKey.currentState?.getSelectedItem?.level1 == e.level1,
                              title: Text(e.level1),
                              onTap: () {
                                myKey.currentState?.popupValidate([e]);
                              },
                            ),
                          )
                              .toList(),
                        ),
                      )
                          : null,
                      onTap: () => myKey.currentState?.popupValidate([item]),
                    );
                  },
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _customDropDownExampleMultiSelection(BuildContext context, List<UserModel> selectedItems) {
    if (selectedItems.isEmpty) {
      return ListTile(
        contentPadding: EdgeInsets.all(0),
        leading: CircleAvatar(),
        title: Text("No item selected"),
      );
    }

    return Wrap(
      children: selectedItems.map((e) {
        return Padding(
          padding: const EdgeInsets.all(4.0),
          child: Container(
            child: ListTile(
              contentPadding: EdgeInsets.all(0),
              leading: CircleAvatar(
                backgroundImage: NetworkImage(e.avatar),
              ),
              title: Text(e.name),
              subtitle: Text(
                e.createdAt.toString(),
              ),
            ),
          ),
        );
      }).toList(),
    );
  }

  Widget _customPopupItemBuilderExample2(BuildContext context, UserModel item, bool isSelected) {
    return Container(
      margin: EdgeInsets.symmetric(horizontal: 8),
      decoration: !isSelected
          ? null
          : BoxDecoration(
        border: Border.all(color: Theme.of(context).primaryColor),
        borderRadius: BorderRadius.circular(5),
        color: Colors.white,
      ),
      child: ListTile(
        selected: isSelected,
        title: Text(item.name),
        subtitle: Text(item.createdAt.toString()),
        leading: CircleAvatar(
          backgroundImage: NetworkImage(item.avatar),
        ),
      ),
    );
  }

  Future<List<UserModel>> getData(filter) async {
    var response = await Dio().get(
      "https://63c1210999c0a15d28e1ec1d.mockapi.io/users",
      queryParameters: {"filter": filter},
    );

    final data = response.data;
    if (data != null) {
      return UserModel.fromJsonList(data);
    }

    return [];
  }
}

class _CheckBoxWidget extends StatefulWidget {
  final Widget child;
  final bool? isSelected;
  final ValueChanged<bool?>? onChanged;

  _CheckBoxWidget({required this.child, this.isSelected, this.onChanged});

  @override
  CheckBoxState createState() => CheckBoxState();
}

class CheckBoxState extends State<_CheckBoxWidget> {
  bool? isSelected;

  @override
  void initState() {
    super.initState();
    isSelected = widget.isSelected;
  }

  @override
  void didUpdateWidget(covariant _CheckBoxWidget oldWidget) {
    if (widget.isSelected != isSelected) isSelected = widget.isSelected;
    super.didUpdateWidget(oldWidget);
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topRight,
          end: Alignment.bottomLeft,
          colors: [
            Color(0x88F44336),
            Colors.blue,
          ],
        ),
      ),
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Row(
            mainAxisAlignment: MainAxisAlignment.end,
            children: [
              Text('Select: '),
              Checkbox(
                  value: isSelected,
                  tristate: true,
                  onChanged: (bool? v) {
                    if (v == null) v = false;
                    setState(() {
                      isSelected = v;
                      if (widget.onChanged != null) widget.onChanged!(v);
                    });
                  }),
            ],
          ),
          Expanded(child: widget.child),
        ],
      ),
    );
  }
}

class MultiLevelString {
  final String level1;
  final List<MultiLevelString> subLevel;
  bool isExpanded;

  MultiLevelString({
    this.level1 = "",
    this.subLevel = const [],
    this.isExpanded = false,
  });

  MultiLevelString copy({
    String? level1,
    List<MultiLevelString>? subLevel,
    bool? isExpanded,
  }) =>
      MultiLevelString(
        level1: level1 ?? this.level1,
        subLevel: subLevel ?? this.subLevel,
        isExpanded: isExpanded ?? this.isExpanded,
      );

  @override
  String toString() => level1;
}

Dotted Border

HcDottedBorder(
    color: Colors.black,
    strokeWidth: 1,
    child: FlutterLogo(size: 148),
)

BorderTypes

This package supports the following border types at the moment

• RectBorder
• RRectBorder
• CircleBorder
• OvalBorder

Example

HcDottedBorder(
  borderType: HcBorderType.rRect,
  radius: Radius.circular(12),
  padding: EdgeInsets.all(6),
  child: ClipRRect(
    borderRadius: BorderRadius.all(Radius.circular(12)),
    child: Container(
      height: 200,
      width: 120,
      color: Colors.amber,
    ),
  ),
);

Dash Pattern

Now you can also specify the Dash Sequence by passing in an Array of Doubles

Example

HcDottedBorder(
    dashPattern: [6, 3, 2, 3], 
    child: ...
);

The above code block will render a dashed border with the following pattern:

• 6 pixel wide dash
• 3 pixel wide space
• 2 pixel wide dash
• 3 pixel wide space

Custom Path Border

You can also specify any path as the customPath property when initializing the DottedBorderWidget, and it will draw it for you using the provided dash pattern.

Example

Path customPath = Path()
  ..moveTo(20, 20)
  ..lineTo(50, 100)
  ..lineTo(20, 200)
  ..lineTo(100, 100)
  ..lineTo(20, 20);

HcDottedBorder(
  customPath: (size) => customPath, // PathBuilder
  color: Colors.indigo,
  dashPattern: [8, 4],
  strokeWidth: 2,
  child: Container(
    height: 220,
    width: 120,
    color: Colors.green.withAlpha(20),
  ),
);

Circular Chart

final GlobalKey<HcAnimatedCircularChartState> _chartKey = new GlobalKey<HcAnimatedCircularChartState>();

Create chart data entry objects:

List<HcCircularSegmentEntry> data = <HcCircularSegmentEntry>[
  new HcCircularSegmentEntry(
    <HcCircularSegmentEntry>[
      new HcCircularSegmentEntry(500.0, Colors.red[200], rankKey: 'Q1'),
      new HcCircularSegmentEntry(1000.0, Colors.green[200], rankKey: 'Q2'),
      new HcCircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
      new HcCircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
    ],
    rankKey: 'Quarterly Profits',
  ),
];

Create an HcAnimatedCircularChart, passing it the _chartKey and initial data:

@override
Widget build(BuildContext context) {
  return new HcAnimatedCircularChart(
    key: _chartKey,
    size: const Size(300.0, 300.0),
    initialChartData: data,
    chartType: HcCircularChartType.pie,
  );
}

Call updateData to animate the chart:

void _cycleSamples() {
  List<HcCircularStackEntry> nextData = <HcCircularStackEntry>[
    new HcCircularStackEntry(
      <HcCircularSegmentEntry>[
        new HcCircularSegmentEntry(1500.0, Colors.red[200], rankKey: 'Q1'),
        new HcCircularSegmentEntry(750.0, Colors.green[200], rankKey: 'Q2'),
        new HcCircularSegmentEntry(2000.0, Colors.blue[200], rankKey: 'Q3'),
        new HcCircularSegmentEntry(1000.0, Colors.yellow[200], rankKey: 'Q4'),
      ],
      rankKey: 'Quarterly Profits',
    ),
  ];
  setState(() {
    _chartKey.currentState.updateData(nextData);
  });
}

Customization

Hole Label:

HcAnimatedCircularChart(
  key: _chartKey,
  size: _chartSize,
  initialChartData: <HcCircularStackEntry>[
    new HcCircularStackEntry(
      <HcCircularSegmentEntry>[
        new HcCircularSegmentEntry(
          33.33,
          Colors.blue[400],
          rankKey: 'completed',
        ),
        new HcCircularSegmentEntry(
          66.67,
          Colors.blueGrey[600],
          rankKey: 'remaining',
        ),
      ],
      rankKey: 'progress',
    ),
  ],
  chartType: HcCircularChartType.Radial,
  percentageValues: true,
  holeLabel: '1/3',
  labelStyle: new TextStyle(
    color: Colors.blueGrey[600],
    fontWeight: FontWeight.bold,
    fontSize: 24.0,
  ),
)

Segment Edge Style:

HcAnimatedCircularChart(
  key: _chartKey,
  size: _chartSize,
  initialChartData: <HcCircularStackEntry>[
    new HcCircularStackEntry(
      <HcCircularSegmentEntry>[
        new HcCircularSegmentEntry(
          33.33,
          Colors.blue[400],
          rankKey: 'completed',
        ),
        new CircularSegmentEntry(
          66.67,
          Colors.blueGrey[600],
          rankKey: 'remaining',
        ),
      ],
      rankKey: 'progress',
    ),
  ],
  chartType: HcCircularChartType.radial,
  edgeStyle: HcSegmentEdgeStyle.round,
  percentageValues: true,
)

Drag And Drop

Drag and drop grid view

import 'package:htkc_utils/htkc_utils.dart';
import 'package:flutter/rendering.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<String> _imageUris = [
    "https://images.pexels.com/photos/4466054/pexels-photo-4466054.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940",
    "https://images.pexels.com/photos/4561739/pexels-photo-4561739.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500",
    "https://images.pexels.com/photos/4507967/pexels-photo-4507967.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500",
    "https://images.pexels.com/photos/4321194/pexels-photo-4321194.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500",
    "https://images.pexels.com/photos/1053924/pexels-photo-1053924.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500",
    "https://images.pexels.com/photos/1624438/pexels-photo-1624438.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260",
    "https://images.pexels.com/photos/1144687/pexels-photo-1144687.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260",
    "https://images.pexels.com/photos/2589010/pexels-photo-2589010.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260"
  ];

  int variableSet = 0;
  ScrollController? _scrollController;
  double? width;
  double? height;

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Drag And drop Plugin'),
        ),
        body: Center(
          child: DragAndDropGridView(
            controller: _scrollController,
            gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: 2,
              childAspectRatio: 3 / 4.5,
            ),
            padding: EdgeInsets.all(20),
            itemBuilder: (context, index) => Card(
              elevation: 2,
              child: LayoutBuilder(
                builder: (context, costrains) {
                  if (variableSet == 0) {
                    height = costrains.maxHeight;
                    width = costrains.maxWidth;
                    variableSet++;
                  }
                  return GridTile(
                    child: Image.network(
                      _imageUris[index],
                      fit: BoxFit.cover,
                      height: height,
                      width: width,
                    ),
                  );
                },
              ),
            ),
            itemCount: _imageUris.length,
            onWillAccept: (oldIndex, newIndex) {
              // Implement you own logic

              // Example reject the reorder if the moving item's value is something specific
              if (_imageUris[newIndex] == "something") {
                return false;
              }
              return true; // If you want to accept the child return true or else return false
            },
            onReorder: (oldIndex, newIndex) {
              final temp = _imageUris[oldIndex];
              _imageUris[oldIndex] = _imageUris[newIndex];
              _imageUris[newIndex] = temp;

              setState(() {});
            },
          ),
        ),
      ),
    );
  }
}

Age Calculate

Age Calculator

import 'package:htkc_utils/htkc_utils.dart';

void main() {
  DateTime birthday = DateTime(1990, 1, 20);
  DateTime today = DateTime.now(); //2020/1/24

  HHcAgeDuration age;

  // Find out your age
  age = HcAge.dateDifference(
      fromDate: birthday, toDate: today, includeToDate: false);

  print('Your age is $age'); // Your age is Years: 30, Months: 0, Days: 4

  // Find out when your next birthday will be.
  DateTime tempDate = DateTime(today.year, birthday.month, birthday.day);
  DateTime nextBirthdayDate = tempDate.isBefore(today)
      ? HcAge.add(date: tempDate, duration: HcAgeDuration(years: 1))
      : tempDate;
  HcAgeDuration nextBirthdayDuration =
  HcAge.dateDifference(fromDate: today, toDate: nextBirthdayDate);

  print('You next birthday will be on $nextBirthdayDate or in $nextBirthdayDuration');
  // You next birthday will be on 2023-01-20 00:00:00.000 or in Years: 0, Months: 11, Days: 27
}

Dropdown Suggestion

DropDown Suggestion Search Field

Single dialog

      HcSearchableDropdown.single(
        items: items,
        value: selectedValue,
        hint: "Select one",
        searchHint: "Select one",
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        isExpanded: true,
      ),

Multi dialog

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: Padding(
          padding: const EdgeInsets.all(12.0),
          child: Text("Select any"),
        ),
        searchHint: "Select any",
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        closeButton: (selectedItems) {
          return (selectedItems.isNotEmpty
              ? "Save ${selectedItems.length == 1 ? '"' + items[selectedItems.first].value.toString() + '"' : '(' + selectedItems.length.toString() + ')'}"
              : "Save without selection");
        },
        isExpanded: true,
      ),

Single done button dialog

      HcSearchableDropdown.single(
        items: items,
        value: selectedValue,
        hint: "Select one",
        searchHint: "Select one",
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        doneButton: "Done",
        displayItem: (item, selected) {
          return (Row(children: [
            selected
                ? Icon(
                    Icons.radio_button_checked,
                    color: Colors.grey,
                  )
                : Icon(
                    Icons.radio_button_unchecked,
                    color: Colors.grey,
                  ),
            SizedBox(width: 7),
            Expanded(
              child: item,
            ),
          ]));
        },
        isExpanded: true,
      ),

Multi custom display dialog

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: Padding(
          padding: const EdgeInsets.all(12.0),
          child: Text("Select any"),
        ),
        searchHint: "Select any",
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        displayItem: (item, selected) {
          return (Row(children: [
            selected
                ? Icon(
                    Icons.check,
                    color: Colors.green,
                  )
                : Icon(
                    Icons.check_box_outline_blank,
                    color: Colors.grey,
                  ),
            SizedBox(width: 7),
            Expanded(
              child: item,
            ),
          ]));
        },
        selectedValueWidgetFn: (item) {
          return (Center(
              child: Card(
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(10),
                    side: BorderSide(
                      color: Colors.brown,
                      width: 0.5,
                    ),
                  ),
                  margin: EdgeInsets.all(12),
                  child: Padding(
                    padding: const EdgeInsets.all(8),
                    child: Text(item.toString()),
                  ))));
        },
        doneButton: (selectedItemsDone, doneContext) {
          return (RaisedButton(
              onPressed: () {
                Navigator.pop(doneContext);
                setState(() {});
              },
              child: Text("Save")));
        },
        closeButton: null,
        style: TextStyle(fontStyle: FontStyle.italic),
        searchFn: (String keyword, items) {
          List<int> ret = List<int>();
          if (keyword != null && items != null && keyword.isNotEmpty) {
            keyword.split(" ").forEach((k) {
              int i = 0;
              items.forEach((item) {
                if (k.isNotEmpty &&
                    (item.value
                        .toString()
                        .toLowerCase()
                        .contains(k.toLowerCase()))) {
                  ret.add(i);
                }
                i++;
              });
            });
          }
          if (keyword.isEmpty) {
            ret = Iterable<int>.generate(items.length).toList();
          }
          return (ret);
        },
        clearIcon: Icon(Icons.clear_all),
        icon: Icon(Icons.arrow_drop_down_circle),
        label: "Label for multi",
        underline: Container(
          height: 1.0,
          decoration: BoxDecoration(
              border:
                  Border(bottom: BorderSide(color: Colors.teal, width: 3.0))),
        ),
        iconDisabledColor: Colors.brown,
        iconEnabledColor: Colors.indigo,
        isExpanded: true,
      ),

Multi select 3 dialog

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: "Select 3 items",
        searchHint: "Select 3",
        validator: (selectedItemsForValidator) {
          if (selectedItemsForValidator.length != 3) {
            return ("Must select 3");
          }
          return (null);
        },
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        doneButton: (selectedItemsDone, doneContext) {
          return (RaisedButton(
              onPressed: selectedItemsDone.length != 3
                  ? null
                  : () {
                      Navigator.pop(doneContext);
                      setState(() {});
                    },
              child: Text("Save")));
        },
        closeButton: (selectedItems) {
          return (selectedItems.length == 3 ? "Ok" : null);
        },
        isExpanded: true,
      ),

Single menu

      HcSearchableDropdown.single(
        items: items,
        value: selectedValue,
        hint: "Select one",
        searchHint: null,
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        dialogBox: false,
        isExpanded: true,
        menuConstraints: BoxConstraints.tight(Size.fromHeight(350)),
      ),

Multi menu

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: "Select any",
        searchHint: "",
        doneButton: "Close",
        closeButton: SizedBox.shrink(),
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        dialogBox: false,
        isExpanded: true,
        menuConstraints: BoxConstraints.tight(Size.fromHeight(350)),
      ),

Multi menu select all/none

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: "Select any",
        searchHint: "Select any",
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        dialogBox: false,
        closeButton: (selectedItemsClose) {
          return Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              RaisedButton(
                  onPressed: () {
                    setState(() {
                      selectedItems.clear();
                      selectedItems.addAll(
                          Iterable<int>.generate(items.length).toList());
                    });
                  },
                  child: Text("Select all")),
              RaisedButton(
                  onPressed: () {
                    setState(() {
                      selectedItems.clear();
                    });
                  },
                  child: Text("Select none")),
            ],
          );
        },
        isExpanded: true,
        menuConstraints: BoxConstraints.tight(Size.fromHeight(350)),
      ),

Multi dialog select all/none without clear

      HcSearchableDropdown.multiple(
        items: items,
        selectedItems: selectedItems,
        hint: "Select any",
        searchHint: "Select any",
        displayClearIcon: false,
        onChanged: (value) {
          setState(() {
            selectedItems = value;
          });
        },
        dialogBox: true,
        closeButton: (selectedItemsClose) {
          return Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              RaisedButton(
                  onPressed: () {
                    setState(() {
                      selectedItems.clear();
                      selectedItems.addAll(
                          Iterable<int>.generate(items.length).toList());
                    });
                  },
                  child: Text("Select all")),
              RaisedButton(
                  onPressed: () {
                    setState(() {
                      selectedItems.clear();
                    });
                  },
                  child: Text("Select none")),
            ],
          );
        },
        isExpanded: true,
      ),

Single dialog custom keyboard

      HcSearchableDropdown.single(
        items: Iterable<int>.generate(20).toList().map((i) {
          return (DropdownMenuItem(
            child: Text(i.toString()),
            value: i.toString(),
          ));
        }).toList(),
        value: selectedValue,
        hint: "Select one number",
        searchHint: "Select one number",
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        dialogBox: true,
        keyboardType: TextInputType.number,
        isExpanded: true,
      ),

Single dialog object

      HcSearchableDropdown.single(
        items: ExampleNumber.list.map((exNum) {
          return (DropdownMenuItem(
              child: Text(exNum.numberString), value: exNum));
        }).toList(),
        value: selectedNumber,
        hint: "Select one number",
        searchHint: "Select one number",
        onChanged: (value) {
          setState(() {
            selectedNumber = value;
          });
        },
        dialogBox: true,
        isExpanded: true,
      ),

Single dialog overflow

      HcSearchableDropdown.single(
        items: [
          DropdownMenuItem(
            child: Text(
                "way too long text for a smartphone at least one that goes in a normal sized pair of trousers but maybe not for a gigantic screen like there is one at my cousin's home in a very remote country where I 
wouldn't want to go right now"),
            value:
                "way too long text for a smartphone at least one that goes in a normal sized pair of trousers but maybe not for a gigantic screen like there is one at my cousin's home in a very remote country where I 
wouldn't want to go right now",
          )
        ],
        value: "",
        hint: "Select one",
        searchHint: "Select one",
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        dialogBox: true,
        isExpanded: true,
      ),

Single dialog readOnly

      HcSearchableDropdown.single(
        items: [
          DropdownMenuItem(
            child: Text(
                "one item"),
            value:
            "one item",
          )
        ],
        value: "one item",
        hint: "Select one",
        searchHint: "Select one",
        disabledHint: "Disabled",
        onChanged: (value) {
          setState(() {
            selectedValue = value;
          });
        },
        dialogBox: true,
        isExpanded: true,
        readOnly: true,
      ),

Single dialog disabled

      HcSearchableDropdown.single(
        items: [
          DropdownMenuItem(
            child: Text(
                "one item"),
            value:
            "one item",
          )
        ],
        value: "one item",
        hint: "Select one",
        searchHint: "Select one",
        disabledHint: "Disabled",
        onChanged: null,
        dialogBox: true,
        isExpanded: true,
      ),

Image Compression

Compress Image

import 'package:htkc_utils/htkc_utils.dart';
void main() {
  runApp(MaterialApp(home: MainPage()));
}

class MainPage extends StatefulWidget {
  @override
  _MainPageState createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  HcConfiguration config = const HcConfiguration();
  ImageFile? image;
  ImageFile? imageOutput;
  bool processing = false;

  @override
  Widget build(BuildContext context) {
    final buttonGallery = ElevatedButton.icon(
      onPressed: handleOpenGallery,
      icon: const Icon(Icons.photo_outlined),
      label: const Text('Pick an Image'),
    );

    final buttonCompress = Padding(
      padding: const EdgeInsets.all(16),
      child: ElevatedButton.icon(
        onPressed: handleCompressImage,
        icon: const Icon(Icons.compress),
        label: const Text('Compress Image'),
      ),
    );

    Widget body = Center(child: buttonGallery);
    if (image != null) {
      final inputImage = Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16),
        child: Image.memory(image!.rawBytes),
      );
      final inputImageSizeType = ListTile(
        title: const Text('Image size-type :'),
        subtitle: Text(
            '${(image!.sizeInBytes / 1024 / 1024).toStringAsFixed(2)} MB - (${image!.width} x ${image!.height})'),
        trailing: Text(image!.extension),
      );
      final inputImageName = ListTile(
        title: const Text('Image name :'),
        subtitle: Text(image!.fileName),
      );

      body = SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Padding(
              padding: const EdgeInsets.fromLTRB(16, 16, 16, 0),
              child: buttonGallery,
            ),
            const ListTile(title: Text('INPUT IMAGE')),
            inputImage,
            inputImageSizeType,
            inputImageName,
            const Divider(),
            const ListTile(title: Text('OUTPUT IMAGE')),
            configOutputType,
            configQuality,
            nativeCompressorCheckBox,
            buttonCompress,
            processing
                ? const Padding(
              padding: EdgeInsets.all(16.0),
              child: LinearProgressIndicator(),
            )
                : const SizedBox.shrink(),
            if (imageOutput != null && !processing)
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 16),
                child: Image.memory(imageOutput!.rawBytes),
              ),
            if (imageOutput != null && !processing)
              ListTile(
                title: const Text('Image size-type :'),
                subtitle: Text(
                    '${(imageOutput!.sizeInBytes / 1024 / 1024).toStringAsFixed(2)} MB - (${imageOutput!.width} x ${imageOutput!.height})'),
                trailing: Text(imageOutput!.contentType ?? '-'),
              ),
          ],
        ),
      );
    }

    return Scaffold(
      appBar: AppBar(
        title: const Text('Image Compression'),
      ),
      body: body,
    );
  }

  Widget get nativeCompressorCheckBox {
    return CheckboxListTile(
      title: const Text('Native compressor for JPG/PNG'),
      value: config.useJpgPngNativeCompressor,
      onChanged: (flag) {
        setState(() {
          config = HcConfiguration(
            outputType: config.outputType,
            useJpgPngNativeCompressor: flag ?? false,
            quality: config.quality,
          );
        });
      },
    );
  }

  Widget get configOutputType {
    return ListTile(
      title: const Text('Select output type'),
      subtitle: Text(config.outputType.toString()),
      trailing: PopupMenuButton<HcImageOutputType>(
        itemBuilder: (context) {
          return HcImageOutputType.values
              .map((e) => PopupMenuItem(
            child: Text(e.toString()),
            value: e,
          ))
              .toList();
        },
        onSelected: (outputType) {
          setState(() {
            config = HcConfiguration(
              outputType: outputType,
              useJpgPngNativeCompressor: config.useJpgPngNativeCompressor,
              quality: config.quality,
            );
          });
        },
      ),
    );
  }

  Widget get configQuality {
    return ListTile(
      title: Text('Select quality (${config.quality})'),
      subtitle: Slider.adaptive(
        value: config.quality.toDouble(),
        divisions: 100,
        min: 0,
        max: 100,
        label: config.quality.toString(),
        onChanged: (value) {
          setState(() {
            config = HcConfiguration(
              outputType: config.outputType,
              useJpgPngNativeCompressor: config.useJpgPngNativeCompressor,
              quality: value.toInt(),
            );
          });
        },
      ),
    );
  }

  handleOpenGallery() async {
    final xFile = await flimer.pickImage(source: ImageSource.gallery);

    if (xFile != null) {
      final image = await xFile.asImageFile;
      setState(() {
        this.image = image;
      });
    }
  }

  handleCompressImage() async {
    setState(() {
      processing = true;
    });
    final param = ImageFileConfiguration(input: image!, config: config);
    final output = await compressor.compress(param);

    setState(() {
      imageOutput = output;
      processing = false;
    });
  }
}

Custom Alert Dialog

Alert Dialog

showNewDialog(
context: context,
builder: (context) => const ChangePswDialog());

OTP Text Field

OTP Field

import 'package:flimer/flimer.dart';
import 'package:htkc_utils/htkc_utils.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Awesome Credit Card Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Awesome Credit Card Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, this.title}) : super(key: key);
  final String? title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  OtpFieldController otpController = OtpFieldController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.cleaning_services),
        onPressed: () {
          print("Floating button was pressed.");
          otpController.clear();
          // otpController.set(['2', '3', '5', '5', '7']);
          // otpController.setValue('3', 0);
          // otpController.setFocus(1);
        },
      ),
      body: Center(
        child: HcOTPTextField(
            controller: otpController,
            length: 5,
            width: MediaQuery.of(context).size.width,
            textFieldAlignment: MainAxisAlignment.spaceAround,
            fieldWidth: 45,
            fieldStyle: FieldStyle.box,
            outlineBorderRadius: 15,
            style: TextStyle(fontSize: 17),
            onChanged: (pin) {
              print("Changed: " + pin);
            },
            onCompleted: (pin) {
              print("Completed: " + pin);
            }),
      ),
    );
  }
}

Emergent Text

Text only handle positive depth

child: EmergentText('I love flutter',
    style: EmergentStyle(
        depth: 4,  //customize depth here
        color: Colors.white, //customize color here
    ),
    textStyle: EmergentTextStyle(
      fontSize: 18, //customize size here
    // AND others usual text style properties (fontFamily, fontWeight, ...)
    ),
),

Emergent Icon

child: EmergentIcon(
    Icons.add_circle,
    size: 80,
),

How to display SVG icons ?

Simply use https://fluttericon.com/ to export your svg as .ttf & use EmergentIcon(YOUR_ICON)

🎨 Custom Shape

Flutter Emergent supports custom shapes, just provide a path to

class MyShapePathProvider extends EmergentPathProvider {
  @override
  bool shouldReclip(EmergentPathProvider oldClipper) {
    return true;
  }

  @override
  Path getPath(Size size) {
    return Path()
      ..moveTo(0, 0)
      ..lineTo(size.width/2, 0)
      ..lineTo(size.width, size.height/2)
      ..lineTo(size.width/2, size.height/2)
      ..lineTo(size.width, size.height)
      ..lineTo(0, size.height)
      ..close();
  }
}

And use EmergentBoxShape.path

child: Emergent(
    style: EmergentStyle(
      boxShape: EmergentBoxShape.path(MyShapePathProvider()),
    ),
...
),

You can import the Flutter logo as a custom shape using

child: Emergent(
    style: EmergentStyle(
      shape: EmergentBoxShape.path(EmergentFlutterLogoPathProvider()),
    ),
    ...
),

🔲 Accessibility / Border

For design purposes, or simply to enhance accessibility, you can add a border on Emergent widgets

child: Emergent(
    style: EmergentStyle(
        border: EmergentBorder(
            color: Color(0x33000000),
            width: 0.8,
        )
    ),
    ...
)

You can enable/disable it (eg: listening an Accessibility Provider) with isEnabled

border: EmergentBorder(
    isEnabled: true,
    color: Color(0x33000000),
    width: 0.8,
)

Note that borderColor and borderWidth default values has been added to EmergentThemeData

🎨 Emergent Theme

EmergentTheme(
    themeMode: ThemeMode.light, //or dark / system
    darkTheme: EmergentThemeData(
        baseColor: Color(0xff333333),
        accentColor: Colors.green,
        lightSource: LightSource.topLeft,
        depth: 4,
        intensity: 0.3,
    ),
    theme: EmergentThemeData(
        baseColor: Color(0xffDDDDDD),
        accentColor: Colors.cyan,
        lightSource: LightSource.topLeft,
        depth: 6,
        intensity: 0.5,
    ),
    child: ...
)

To retrieve the current used theme :

final theme = EmergentTheme.currentTheme(context);
final baseColor = theme.baseColor;
final accentColor = theme.accentColor;

Toggle from light to dark

EmergentTheme.of(context).themeMode = ThemeMode.dark;

Know if using dark

if(EmergentTheme.of(context).isUsingDark){

}

EmergentApp

You can use directly in your project a EmergentApp, surrounding your code

It handle directly EmergentTheme & Navigation (and all possibilities of MaterialApp )

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return EmergentApp(
      debugShowCheckedModeBanner: false,
      title: 'Emergent App',
      themeMode: ThemeMode.light,
      theme: EmergentThemeData(
        baseColor: Color(0xFFFFFFFF),
        lightSource: LightSource.topLeft,
        depth: 10,
      ),
      darkTheme: EmergentThemeData(
        baseColor: Color(0xFF3E3E3E),
        lightSource: LightSource.topLeft,
        depth: 6,
      ),
      home: MyHomePage(),
    );
  }
}

System Utils

You can use directly in your project a hcSetStatusBarColor, inside build(BuildContext context), and hcFinish(context) to pop Context.

@override
Widget build(BuildContext context) {
  hcSetStatusBarColor(Colors.blue);
  return Scaffold(
  ...
  onPressed: () { hcFinish(context); }
  ...

Flutter Chat UI

Chat(
    messages: _messages,
    onAttachmentPressed: _handleAttachmentPressed,
    onMessageTap: _handleMessageTap,
    onPreviewDataFetched: _handlePreviewDataFetched,
    onSendPressed: _handleSendPressed,
    showUserAvatars: true,
    showUserNames: true,
user: _user,
),