# CalendarDatePicker2

[![Pub Package](https://img.shields.io/badge/pub-v1.1.4-blue)](https://pub.dev/packages/calendar_date_picker2)
[![Pub Package](https://img.shields.io/badge/flutter-%3E%3D1.17.0-green)](https://flutter.dev/)
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A lightweight and customizable calendar picker based on Flutter CalendarDatePicker, with support for single date picker, range picker and multi picker.

| ![single-mode-picker](https://user-images.githubusercontent.com/17869748/169690600-de51bee2-6f59-4f6a-95bf-c55e00dc54ae.gif) | ![multi-mode-picker](https://user-images.githubusercontent.com/17869748/169690730-e9cb5b29-8994-4e46-905e-83a14cc19809.gif) | ![range-picker-mode](https://user-images.githubusercontent.com/17869748/169690843-a7dc3fc2-0598-4050-aee0-e676d3a98c6c.gif) | ![dialog-function](https://user-images.githubusercontent.com/17869748/169691322-04404a63-53ff-4f90-a183-8d658806dedc.gif) |
| :--------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------: |
|                                                       **single mode**                                                        |                                                       **multi mode**                                                        |                                                       **range mode**                                                        |                                                    **dialog function**                                                    |

| ![single-scroll-mode-picker](https://raw.githubusercontent.com/theideasaler/calendar_date_picker2/main/example/screenshots/calendar-date-picker-2-single-picker-scroll.gif) | ![multi-scroll-mode-picker](https://raw.githubusercontent.com/theideasaler/calendar_date_picker2/main/example/screenshots/calendar-date-picker-2-multi-picker-scroll.gif) | ![range-scroll-picker-mode](https://raw.githubusercontent.com/theideasaler/calendar_date_picker2/main/example/screenshots/calendar-date-picker-2-range-picker-scroll.gif) | ![dialog-scroll-function](https://raw.githubusercontent.com/theideasaler/calendar_date_picker2/main/example/screenshots/calendar-date-picker-2-dialog-func-scroll.gif) |
| :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
|                                                                              **single scroll**                                                                              |                                                                             **multi scroll**                                                                              |                                                                             **range scroll**                                                                              |                                                                           **dialog scroll**                                                                            |

## Intro

CalendarDatePicker2 consists of two main widgets:

- `CalendarDatePicker2`, this widget only includes the calendar UI and will emit event whenever user taps a different date.
- `CalendarDatePicker2WithActionButtons`, this widget includes calendar UI and the action buttons (CANCEL & OK). This widget will only emit the updated value when user taps 'OK' button.

## Features

- Extended CalendarDatePicker allows `null` initialDate
- Highly Customizable UI
- Supports three modes: single, multi and range
- Supports four views: day, month, year and scroll
- Built-in `showCalendarDatePicker2Dialog`
- Multi-language supports
- Support of Material 3

## Migrate from 0.x.x

Version 1.x.x will by default enable month picker. If you want to migrate to v1.x.x from v0.x.x and would like to keep the old behavior, you will need to set `disableMonthPicker` to `true`.

## How to use

**Make sure to check out [examples](https://github.com/theideasaler/calendar_date_picker2/tree/main/example) for more details.**

### Installation

Add the following line to `pubspec.yaml`:

```yaml
dependencies:
calendar_date_picker2: ^1.1.4
```

### Basic setup

_The complete example is available [here](https://github.com/theideasaler/calendar_date_picker2/blob/main/example/lib/main.dart)._

**CalendarDatePicker2** requires you to provide `config` and `value`:

- `config` contains the configurations for your calendar setup and UI.
- `value` is initial values passed into your calendar picker, `value` must be a `List`.

### The minimum working sample

```dart
CalendarDatePicker2(
  config: CalendarDatePicker2Config(),
  value: _dates,
  onValueChanged: (dates) => _dates = dates,
);
```

### Single Date Picker Configuration

During the initialization of `CalendarDatePicker2Config` the `calendarType` of the config instance will by default set to `CalendarDatePicker2Type.single`, so you don't have to set the calendar type specifically.

### Multi Date Picker Configuration

In order to use multi mode date picker, you will need to set the calendarType of config to `CalendarDatePicker2Type.multi`:

```dart
CalendarDatePicker2(
  config: CalendarDatePicker2Config(
      calendarType: CalendarDatePicker2Type.multi,
  ),
  value: _dates,
  onValueChanged: (dates) => _dates = dates,
);
```

### Range Date Picker Configuration

In order to use range mode date picker, you will need to set the calendarType of config to `CalendarDatePicker2Type.range`:

```dart
CalendarDatePicker2(
  config: CalendarDatePicker2Config(
      calendarType: CalendarDatePicker2Type.range,
  ),
  value: _dates,
  onValueChanged: (dates) => _dates = dates,
);
```

### Use built-in dialog display method

This package includes built-in support to display calendar as a dialog. To use it, you will need to call `showCalendarDatePicker2Dialog`, which takes three required arguments: `context`, `config`, `dialogSize`:

```dart
...
var results = await showCalendarDatePicker2Dialog(
  context: context,
  config: CalendarDatePicker2WithActionButtonsConfig(),
  dialogSize: const Size(325, 400),
  value: _dates,
  borderRadius: BorderRadius.circular(15),
);
...
```

### Config options

### For CalendarDatePicker2 widget

| Argument                | Type                            | Description                                                                            |
| ----------------------- | ------------------------------- | -------------------------------------------------------------------------------------- |
| config                  | CalendarDatePicker2Config       | Calendar UI related configurations                                                     |
| value                   | List\<DateTime?\>               | The selected [DateTime]s that the picker should display.                               |
| onValueChanged          | ValueChanged<List\<DateTime\>>? | Called when the selected dates changed                                                 |
| displayedMonthDate      | DateTime?                       | Date to control calendar displayed month                                               |
| onDisplayedMonthChanged | ValueChanged\<DateTime\>?       | Called when the user navigates to a new month/year in the picker under non-scroll mode |

### For CalendarDatePicker2Config:

| Option                         | Type                                | Description                                                                                                   |
| ------------------------------ | ----------------------------------- | ------------------------------------------------------------------------------------------------------------- |
| calendarType                   | CalendarDatePicker2Type?            | Calendar picker type, has 3 values: single, multi, range                                                      |
| rangeBidirectional             | bool?                               | Flag to enable selecting dates range also in reverse-chronological order                                      |
| firstDate                      | DateTime?                           | The earliest allowable DateTime user can select                                                               |
| lastDate                       | DateTime?                           | The latest allowable DateTime user can select                                                                 |
| currentDate                    | DateTime?                           | The DateTime representing today which will be outlined in calendar                                            |
| calendarViewMode               | CalendarDatePicker2Mode?            | The initially displayed view of the calendar picker, with four options available: day, month, year and scroll |
| calendarViewScrollPhysics      | ScrollPhysics?                      | The scroll physics for the calendar month view                                                                |
| dynamicCalendarRows            | bool?                               | Flag to enable dynamic calendar rows based on specific month                                                  |
| allowSameValueSelection        | bool?                               | Flag to control [onValueChanged] behavior                                                                     |
| animateToDisplayedMonthDate    | bool?                               | Flag to always animate to the displayedMonthDate                                                              |
| weekdayLabels                  | List\<String\>?                     | Custom weekday labels, should starts with Sunday                                                              |
| weekdayLabelTextStyle          | TextStyle?                          | Custom text style for weekday labels                                                                          |
| firstDayOfWeek                 | int?                                | Index of the first day of week, where 0 points to Sunday, and 6 points to Saturday.                           |
| lastMonthIcon                  | Widget?                             | Custom icon for last month button control                                                                     |
| nextMonthIcon                  | Widget?                             | Custom icon for next month button control                                                                     |
| controlsHeight                 | double?                             | Custom height for calendar control toggle's height                                                            |
| controlsTextStyle              | TextStyle?                          | Custom text style for calendar mode toggle control                                                            |
| centerAlignModePicker          | bool?                               | Flag to centralize year and month text label in controls                                                      |
| disableModePicker              | bool?                               | Flag to disable mode picker and hide the toggle icon                                                          |
| modePickerTextHandler          | CalendarModePickerTextHandler?      | Function to control mode picker displayed text                                                                |
| customModePickerIcon           | Widget?                             | Custom icon for the mode picker button icon                                                                   |
| modePickerTextHandler          | CalendarModePickerTextHandler?      | Function to control mode picker displayed text                                                                |
| useAbbrLabelForMonthModePicker | bool?                               | Use Abbreviation label for month mode picker, only works when month picker is enabled                         |
| dayViewController              | PageController?                     | Custom page controller for the calendar day view                                                              |
| dayMaxWidth                    | double?                             | Max width of day widget. When [dayMaxWidth] is not null, it will override default size settings               |
| dayBorderRadius                | BorderRadius?                       | Custom border radius for day indicator                                                                        |
| dayTextStyle                   | TextStyle?                          | Custom text style for calendar day text                                                                       |
| todayTextStyle                 | TextStyle?                          | Custom text style for current calendar day                                                                    |
| disabledDayTextStyle           | TextStyle?                          | Custom text style for disabled calendar day(s)                                                                |
| dayTextStylePredicate          | CalendarDayTextStylePredicate?      | Function to provide full control over calendar days text style                                                |
| selectedDayTextStyle           | TextStyle?                          | Custom text style for selected calendar day text                                                              |
| selectedRangeDayTextStyle      | TextStyle?                          | Custom text style for selected range calendar day(s)                                                          |
| selectedDayHighlightColor      | Color?                              | The highlight color selected day                                                                              |
| selectedRangeHighlightColor    | Color?                              | The highlight color for day(s) included in the selected range                                                 |
| selectableDayPredicate         | CalendarSelectableDayPredicate?     | Function to provide full control over which dates in the calendar can be selected                             |
| daySplashColor                 | Color?                              | The splash color of the day widget                                                                            |
| dayBuilder                     | CalendarDayBuilder?                 | Function to provide full control over day widget UI                                                           |
| monthViewController            | ScrollController?                   | Custom scroll controller for the calendar month view                                                          |
| monthBuilder                   | CalendarMonthBuilder?               | Function to provide full control over month widget UI                                                         |
| hideMonthPickerDividers        | bool?                               | Flag to hide dividers on month picker                                                                         |
| selectableMonthPredicate       | CalendarSelectableMonthPredicate?   | Function to provide full control over which month in the month list can be selected.                          |
| disableMonthPicker             | bool?                               | Flag to disable month picker                                                                                  |
| yearViewController             | ScrollController?                   | Custom scroll controller for the calendar year view                                                           |
| yearBorderRadius               | BorderRadius?                       | Custom border radius for year indicator                                                                       |
| yearTextStyle                  | TextStyle?                          | Custom text style for years list                                                                              |
| selectedYearTextStyle          | TextStyle?                          | Custom text style for selected year                                                                           |
| selectableYearPredicate        | CalendarSelectableYearPredicate?    | Function to provide full control over which year in the year list be selected.                                |
| yearBuilder                    | CalendarYearBuilder?                | Function to provide full control over year widget UI                                                          |
| hideYearPickerDividers         | bool?                               | Flag to hide dividers on year picker                                                                          |
| scrollViewTopHeaderTextStyle   | TextStyle?                          | Custom text style for scroll view top week labels header                                                      |
| hideScrollViewTopHeader        | bool?                               | Flag to hide top week labels header on scroll view picker                                                     |
| hideScrollViewTopHeaderDivider | bool?                               | Flag to hide top week labels header divider on scroll view                                                    |
| hideScrollViewMonthWeekHeader  | bool?                               | Flag to hide month calendar week labels header on scroll view                                                 |
| scrollViewConstraints          | BoxConstraints?                     | BoxConstraints for the scroll calendar view, only work for scroll mode                                        |
| scrollViewMonthYearBuilder     | CalendarScrollViewMonthYearBuilder? | Function to provide full control over scroll calendar month year UI                                           |
| scrollViewOnScrolling          | CalendarScrollViewOnScrolling?      | Function to callback over scrolling on scroll view                                                            |
| scrollViewController           | ScrollController?                   | Custom scroll controller to the scroll calendar view                                                          |

### In addition to the configurations above, CalendarDatePicker2WithActionButtonsConfig has 9 extra options

| Option                       | Type        | Description                                     |
| ---------------------------- | ----------- | ----------------------------------------------- |
| gapBetweenCalendarAndButtons | double?     | The gap between calendar and action buttons     |
| cancelButtonTextStyle        | TextStyle?  | Text style for cancel button                    |
| cancelButton                 | Widget?     | Custom cancel button                            |
| okButtonTextStyle            | TextStyle?  | Text style for ok button                        |
| okButton                     | Widget?     | Custom ok button                                |
| openedFromDialog             | bool?       | Is the calendar opened from dialog              |
| closeDialogOnCancelTapped    | bool?       | Close dialog after user taps the CANCEL button  |
| closeDialogOnOkTapped        | bool?       | Close dialog after user taps the OK button      |
| buttonPadding                | EdgeInsets? | Custom wrapping padding for Ok & Cancel buttons |

### Custom UI

By using the configs above, you could make your own custom calendar picker as your need.

<img width="200" alt="image" src="https://user-images.githubusercontent.com/17869748/223992571-f153515d-170d-48f6-afce-84f59f58940b.png"><img width="200" alt="image" src="https://github.com/theideasaler/calendar_date_picker2/assets/17869748/f10683b7-aa13-4abe-8d2e-8bac4066e611"><img width="200" alt="image" src="https://user-images.githubusercontent.com/17869748/223992976-5539a3af-6409-4983-958b-ca927a9d714f.png">

```dart
CalendarDatePicker2WithActionButtons(
  config: CalendarDatePicker2WithActionButtonsConfig(
    firstDayOfWeek: 1,
    calendarType: CalendarDatePicker2Type.range,
    selectedDayTextStyle: TextStyle(color: Colors.white, fontWeight: FontWeight.w700),
    selectedDayHighlightColor: Colors.purple[800],
    centerAlignModePicker: true,
    customModePickerIcon: SizedBox(),
    dayBuilder: _yourDayBuilder,
    yearBuilder: _yourYearBuilder,
  ),
  value: _dates,
  onValueChanged: (dates) => _dates = dates,
);
```

## Multi-language support

This package has multi-language supports. To enable it, add your `Locale` into the wrapping `MaterialApp`:

```dart
MaterialApp(
  localizationsDelegates: GlobalMaterialLocalizations.delegates,
  supportedLocales: const [
    Locale('en', ''),
    Locale('zh', ''),
    Locale('ru', ''),
    Locale('es', ''),
    Locale('hi', ''),
  ],
  ...
);
```

| <img width="232" alt="image" src="https://user-images.githubusercontent.com/17869748/227443635-604afb00-9d26-4e2b-ae66-5839ac25347f.png"> | <img width="232" alt="image" src="https://user-images.githubusercontent.com/17869748/227442622-1e17ec84-9593-4587-b54a-506aeb020d32.png"> | <img width="232" alt="image" src="https://user-images.githubusercontent.com/17869748/227443327-89ce40ba-e661-4006-ba42-dfcc3ae27d43.png"> | <img width="232" alt="image" src="https://user-images.githubusercontent.com/17869748/227444732-bd137b1d-9941-4542-89bc-6f63407e422d.png"> |
| :---------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------: |
|                                                                 **中文**                                                                  |                                                                **русский**                                                                |                                                                **español**                                                                |                                                                 **हिंदी**                                                                 |

## Contributions

Feel free to contribute to this project. 🍺 Pull requests are welcome!

There are some tips before creating a PR:

- Please always create an issue/feature before raising a PR
- Please always create a minimum reproducible example for an issue
- Please use the official [Dart Extension](https://marketplace.visualstudio.com/items?itemName=Dart-Code.dart-code) as your formatter or use `dart format . -l 80` if you are not using VS Code
- Please keep your changes to its minimum needed scope (avoid introducing unrelated changes)
- Please follow this git commit [convention](https://www.conventionalcommits.org/en/v1.0.0-beta.2/) by adding `feat:` or `fix:` to your PR commit
