Added `CalendarDelegate` class that supports plugging in custom calendar
logics other than Gregorian Calendar System.
Here is an example implementation for Nepali(Bikram Sambat) Calendar
System:
https://github.com/sarbagyastha/nepali_date_picker/blob/m3/lib/src/nepali_calendar_delegate.dart
Demo using the `NepaliDatePickerDelegate`:
https://date.sarbagyastha.com.np/
Fixes https://github.com/flutter/flutter/issues/77531,
https://github.com/flutter/flutter/issues/161873
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responsibilities.
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we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.
---------
Co-authored-by: Tong Mu <dkwingsmt@users.noreply.github.com>
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**Reviewers:** Please carefully review all the commits except for the
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Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
This PR introduces a basic example of how to use the `showDatePicker` function. The purpose of this PR is to simplify the onboarding process for new Flutter developers by providing a straightforward demonstration of handling the asynchronous Future returned by the showDatePicker. This will help users unfamiliar with the intricacies of asynchronous operations in Flutter.
Fixes#156157
