dependencies:
    flutter_scale: 0.1.2

import 'package:flutter_scale/flutter_scale.dart';

class _Example1State extends State<Example1> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: VerticalScale(
            maxValue: 13,
            scaleController: ScrollController(),
    ));
  }
}

class _Example1State extends State<Example1> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: HorizontalScale(
            maxValue: 25,
            scaleController: ScrollController(),
    ));
  }
}

class _Example1State extends State<Example1> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: VerticalScale(
      maxValue: 7,
      scaleController: ScrollController(initialScrollOffset: 200),
      scaleColor: Colors.redAccent,
      lineColor: Colors.amber,
      linesBetweenTwoPoints: 5,
      middleLineAt: 3,
      pointer: RotatedBox(
          quarterTurns: 1, child: Image.asset('assets/images/tooltip.png')),
      textStyle: TextStyle(
        fontSize: 35,
        color: Colors.amber,
        fontWeight: FontWeight.bold,
        fontStyle: FontStyle.italic,
      ),
    ));
  }
}