coordinator_input 1.0.0

Coordinate input widget for Flutter with geographic and UTM modes, current location support, and testable MVVM architecture.

coordinator_input

coordinator_input is a Flutter package that provides a coordinate editor with two synchronized modes:

• Geographic coordinates (latitude / longitude)
• UTM coordinates (easting / northing)

The package also supports reading the device's current location through geolocator and exposes a testable MVVM structure for custom integrations.

Features

• Toggle between geographic and UTM input
• Keep both representations synchronized
• Start with an initial coordinate
• Receive geographic updates through onChanged
• Receive updates in the active mode through onValueChanged
• Fill the form with the current device location
• Test-friendly architecture with separated domain, viewmodel, and infrastructure layers

Getting started

Add the dependency:

dependencies:
  coordinator_input: ^1.0.0

If you want to use current location, configure the native permissions required by geolocator in Android and iOS.

Usage

import 'package:coordinator_input/coordinator_input.dart';
import 'package:flutter/material.dart';

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

  @override
  Widget build(BuildContext context) {
    return CoordsInput(
      initialCoordinate: const EditorCoordinate(
        latitude: -19.5356,
        longitude: -40.6306,
      ),
      onChanged: (coordinate) {
        debugPrint('Geographic coordinate: $coordinate');
      },
      onValueChanged: (value) {
        debugPrint('Current mode value: $value');
      },
    );
  }
}

When CoordsInput is in geographic mode, onValueChanged emits an EditorCoordinate. When it is in UTM mode, it emits a UtmCoordinate.

Architecture

Public package entrypoint:

• CoordsInput for UI usage
• EditorCoordinate and UtmCoordinate for domain data
• CoordinateConverter for coordinate transformations
• CoordsInputViewModel and LocationService for customization and tests

License

This package is available under the MIT license.

Testing

Run:

flutter test