From 7c8b5676fecffe5468810b703c579acb6a5fd256 Mon Sep 17 00:00:00 2001
From: Mica White <botahamec@outlook.com>
Date: Mon, 8 Dec 2025 20:12:09 -0500
Subject: First commit

---
 lib/main.dart | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100755 lib/main.dart

(limited to 'lib/main.dart')

diff --git a/lib/main.dart b/lib/main.dart
new file mode 100755
index 0000000..cf8e184
--- /dev/null
+++ b/lib/main.dart
@@ -0,0 +1,130 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:geolocator/geolocator.dart';
+
+enum SpeedUnit { milesPerHour, kilometersPerHour }
+
+extension on SpeedUnit {
+  double fromMetersPerSecond(double metersPerSecond) => switch (this) {
+    SpeedUnit.kilometersPerHour => metersPerSecond * 3.6,
+    SpeedUnit.milesPerHour => metersPerSecond * 2.236936,
+  };
+
+  get acronym => switch (this) {
+    SpeedUnit.kilometersPerHour => 'kmph',
+    SpeedUnit.milesPerHour => 'mph',
+  };
+}
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Speedometer',
+      theme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.red),
+      ),
+      darkTheme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(
+          seedColor: Colors.red,
+          brightness: Brightness.dark,
+        ),
+      ),
+      home: const MyHomePage(title: 'Speedometer'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key, required this.title});
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  StreamSubscription<Position>? _positionStream;
+  double _speed = 0.0;
+  double _speedAccuracy = 0.0;
+  SpeedUnit _speedUnit = SpeedUnit.milesPerHour;
+  LocationSettings _locationSettings = LocationSettings();
+
+  @override
+  void initState() {
+    super.initState();
+    _positionStream =
+        Geolocator.getPositionStream(
+          locationSettings: _locationSettings,
+        ).listen((Position? position) {
+          if (position != null) {
+            _speed = position.speed;
+            _speedAccuracy = position.speedAccuracy;
+          }
+        });
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+    _positionStream?.cancel();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // TRY THIS: Try changing the color here to a specific color (to
+        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
+        // change color while the other colors stay the same.
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: Text(widget.title),
+      ),
+      body: Center(
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: [
+            Flex(direction: Axis.horizontal),
+            Text(
+              '${_speedUnit.fromMetersPerSecond(_speed)} ${_speedUnit.acronym}',
+              style: Theme.of(context).textTheme.displayLarge,
+            ),
+            Text(
+              '± ${_speedUnit.fromMetersPerSecond(_speedAccuracy)} ${_speedUnit.acronym}',
+              style: Theme.of(context).textTheme.displaySmall,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
-- 
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