joyful-arc-1229

readme.md

joyful-arc-1229

Created with <3 with dartpad.dev.

main.dart

import 'package:flutter/material.dart';
import 'dart:math' as math;

const Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: darkBlue,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  final backgroundImage = const DecorationImage(
    image: NetworkImage(
        'https://content.presentermedia.com/files/clipart/00003000/3871/blank_speedometer_800_wht.jpg'),
    fit: BoxFit.cover,
  );

  @override
  Widget build(BuildContext context) {
    return Stack(children: [
      Container(
        decoration: BoxDecoration(
          color: Colors.white,
          image: backgroundImage,
          shape: BoxShape.circle,
        ),
      ),
      const Needle(),
    ]);
  }
}

class Needle extends StatefulWidget {
  const Needle({Key? key}) : super(key: key);

  @override
  State<Needle> createState() => _NeedleState();
}

class _NeedleState extends State<Needle> with TickerProviderStateMixin {
  late final AnimationController _controller = AnimationController(
    duration: const Duration(seconds: 2),
    vsync: this,
    lowerBound: 0.0,
    upperBound: 0.5,
  )..repeat(reverse: true);
  late final Animation<double> _animation = CurvedAnimation(
    parent: _controller,
    curve: Curves.fastOutSlowIn,
    reverseCurve: Curves.decelerate,
  );

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return RotationTransition(
      turns: _animation,
      child: Align(
          alignment: Alignment.center,
          child: Transform.rotate(
            angle: -math.pi / 1.35,
            child: const Icon(
              Icons.straight,
              color: Colors.red,
              size: 360,
            ),
          )),
    );
  }
}