init
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randogoth
commit
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274
lib/main.dart
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274
lib/main.dart
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import 'package:flutter/material.dart';
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import 'package:flutter_map/flutter_map.dart';
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import 'package:latlong2/latlong.dart';
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import 'package:geolocator/geolocator.dart';
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import 'package:map3terms/src/map3terms_scrambler.dart';
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void main() {
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runApp(WhatFreeWordsApp());
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}
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class WhatFreeWordsApp extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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title: 'WhatFreeWords Map',
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theme: ThemeData.dark().copyWith(
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primaryColor: Colors.blue,
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scaffoldBackgroundColor: Colors.black,
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textTheme: TextTheme(
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bodyMedium: TextStyle(color: Colors.white),
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),
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),
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home: WhatFreeWordsHome(),
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);
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}
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}
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class WhatFreeWordsHome extends StatefulWidget {
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@override
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_WhatFreeWordsHomeState createState() => _WhatFreeWordsHomeState();
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}
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class _WhatFreeWordsHomeState extends State<WhatFreeWordsHome> {
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final TextEditingController _inputController = TextEditingController();
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final MapController _mapController = MapController();
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LatLng _center = LatLng(51.50844113, -0.116708278); // Default: London
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@override
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void initState() {
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super.initState();
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_updateWordsFromCenter();
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}
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/// **Handles input change: Detects if input is coordinates or words**
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Future<void> _handleInput() async {
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final String input = _inputController.text.trim();
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if (_isCoordinate(input)) {
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await _updateMapFromCoordinates(input);
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} else {
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await _updateMapFromWords();
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}
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}
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/// **Checks if input is a valid coordinate format (-90 to 90, -180 to 180)**
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bool _isCoordinate(String input) {
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final RegExp coordRegex = RegExp(
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r"^(-?[0-9]{1,2}(?:\.[0-9]+)?),\s*(-?[0-9]{1,3}(?:\.[0-9]+)?)$",
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);
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return coordRegex.hasMatch(input);
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}
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/// **Centers the map from coordinates entered in the text field**
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Future<void> _updateMapFromCoordinates(String input) async {
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try {
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final parts = input.split(',');
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final double lat = double.parse(parts[0].trim());
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final double lon = double.parse(parts[1].trim());
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if (lat < -90 || lat > 90 || lon < -180 || lon > 180) {
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throw FormatException("Coordinates out of range.");
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}
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setState(() {
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_center = LatLng(lat, lon);
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_mapController.move(_center, _mapController.camera.zoom);
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});
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await _updateWordsFromCenter();
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} catch (e) {
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_showError("Invalid coordinate format. Use: lat, lon");
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}
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}
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/// **Centers the map when words are entered**
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Future<void> _updateMapFromWords() async {
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final words = _inputController.text.trim().replaceAll(" ", ".");
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if (words.isEmpty) return;
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try {
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final coords = await wordsToCoord(words);
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setState(() {
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_center = LatLng(coords[0], coords[1]);
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_mapController.move(_center, _mapController.camera.zoom);
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});
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} catch (e) {
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_showError("Invalid words format.");
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}
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}
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/// **Updates the words when the map moves**
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Future<void> _updateWordsFromCenter() async {
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try {
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final words = await coordToWords([_center.latitude, _center.longitude]);
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setState(() {
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_inputController.text = words.replaceAll(".", " ");
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});
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} catch (e) {
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print("Error converting coordinates to words: $e");
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}
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}
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/// **Centers map on user location**
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Future<void> _centerOnUserLocation() async {
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LocationPermission permission = await Geolocator.checkPermission();
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if (permission == LocationPermission.denied) {
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permission = await Geolocator.requestPermission();
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if (permission == LocationPermission.denied) {
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_showError("Location permission denied.");
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return;
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}
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}
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final Position position = await Geolocator.getCurrentPosition(
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desiredAccuracy: LocationAccuracy.high);
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setState(() {
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_center = LatLng(position.latitude, position.longitude);
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_mapController.move(_center, _mapController.camera.zoom);
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});
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_updateWordsFromCenter();
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}
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/// **Shows error messages in a snackbar**
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void _showError(String message) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(message), backgroundColor: Colors.red),
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);
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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body: Stack(
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children: [
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Column(
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children: [
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Padding(
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padding: const EdgeInsets.all(10.0),
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child: TextField(
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controller: _inputController,
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textAlign: TextAlign.center,
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style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold, color: Colors.white),
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decoration: InputDecoration(
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labelText: 'Enter Words or Coordinates',
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labelStyle: TextStyle(
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color: Colors.grey,
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fontSize: 16,
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fontWeight: FontWeight.w800
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),
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filled: true,
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fillColor: Colors.grey[900],
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(15),
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borderSide: BorderSide.none,
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),
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suffixIcon: IconButton(
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icon: Icon(Icons.search, color: Colors.white),
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onPressed: _handleInput,
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),
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),
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onSubmitted: (_) => _handleInput(),
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),
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),
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Expanded(
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child: Stack(
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children: [
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FlutterMap(
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mapController: _mapController,
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options: MapOptions(
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initialCenter: _center,
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initialZoom: 16.0,
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onPositionChanged: (position, hasGesture) {
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if (hasGesture) {
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setState(() {
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_center = position.center!;
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});
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_updateWordsFromCenter();
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}
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},
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),
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children: [
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TileLayer(
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urlTemplate: "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}",
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subdomains: ['a', 'b', 'c'],
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),
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PolygonLayer(
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polygons: [
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Polygon(
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points: _boundingBox(_center),
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color: Colors.white.withOpacity(0.1),
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borderStrokeWidth: 2,
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borderColor: Colors.white,
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),
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],
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),
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],
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),
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Positioned.fill(
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child: IgnorePointer(
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child: CustomPaint(
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painter: CrossOverlayPainter(),
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),
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),
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),
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]
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),
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),
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]
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),
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Positioned(
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bottom: 20,
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right: 20,
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child: FloatingActionButton(
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onPressed: _centerOnUserLocation,
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child: Icon(Icons.my_location, color: Colors.black),
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backgroundColor: Colors.white,
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),
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),
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],
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),
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);
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}
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/// **Computes the bounding box based on word grid size (~6m)**
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List<LatLng> _boundingBox(LatLng center) {
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const double wordGridSize = 0.00006; // ~6m per word
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return [
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LatLng(center.latitude + wordGridSize, center.longitude - wordGridSize),
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LatLng(center.latitude + wordGridSize, center.longitude + wordGridSize),
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LatLng(center.latitude - wordGridSize, center.longitude + wordGridSize),
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LatLng(center.latitude - wordGridSize, center.longitude - wordGridSize),
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];
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}
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}
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class CrossOverlayPainter extends CustomPainter {
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@override
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void paint(Canvas canvas, Size size) {
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final paint = Paint()
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..color = Colors.white.withOpacity(0.5) // Adjust color & opacity
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..strokeWidth = 1;
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// Draw horizontal line across the entire screen
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canvas.drawLine(
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Offset(0, size.height / 2) , // Left edge
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Offset(size.width, size.height / 2), // Right edge
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paint,
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);
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// Draw vertical line across the entire screen
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canvas.drawLine(
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Offset(size.width / 2, 0), // Top edge
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Offset(size.width / 2, size.height), // Bottom edge
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paint,
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);
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) => false;
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}
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