samples/gallery/lib/studies/rally/charts/vertical_fraction_bar.dart

// Copyright 2019 The Flutter team. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';

class VerticalFractionBar extends StatelessWidget {
  const VerticalFractionBar({this.color, this.fraction});

  final Color color;
  final double fraction;

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(builder: (context, constraints) {
      return SizedBox(
        height: constraints.maxHeight,
        width: 4,
        child: Column(
          children: [
            SizedBox(
              height: (1 - fraction) * constraints.maxHeight,
              child: Container(
                color: Colors.black,
              ),
            ),
            SizedBox(
              height: fraction * constraints.maxHeight,
              child: Container(color: color),
            ),
          ],
        ),
      );
    });
  }
}