content: import 'package:flutter/material.dart';
  
  import 'controls/brightness_control.dart';
  import 'controls/color_selector.dart';
  
  import '../../help/help.dart';
  
  Widget getFieldsRow(List<Widget> children, {Axis direction: Axis.horizontal}) {
    final isHorizontal = direction == Axis.horizontal;
    return Flex(
      direction: direction,
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      mainAxisSize: isHorizontal ? MainAxisSize.max : MainAxisSize.min,
      children: children
          .map((widget) => isHorizontal ? Expanded(child: widget) : widget)
          .toList(growable: false),
    );
  }
  
  Widget getColorBrightnessSelector({
    String label,
    Color currentColor,
    ValueChanged<Color> changeHandler,
    bool isDark,
    ValueChanged<bool> brightnessChangeHandler,
    HelpData help,
  }) =>
      Row(
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Expanded(
              child: ColorSelector(
            label,
            currentColor,
            changeHandler,
            help: help,
          )),
          BrightnessSelector(
              label: 'Brightness',
              isDark: isDark,
              onChange: brightnessChangeHandler)
        ],
      );
  
  Widget getSwatchBrightnessSelector(
          {String label,
          ColorSwatch currentColor,
          ValueChanged<Color> changeHandler,
          bool isDark,
          ValueChanged<bool> brightnessChangeHandler}) =>
      Row(
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Expanded(child: ColorSelector(label, currentColor, changeHandler)),
          BrightnessSelector(
              label: 'Brightness',
              isDark: isDark,
              onChange: brightnessChangeHandler)
        ],
      );
  
  class FieldBorder extends StatelessWidget {
    final Widget child;
    final EdgeInsets padding;
  
    const FieldBorder({
      Key key,
      this.child,
      this.padding: const EdgeInsets.symmetric(horizontal: 12.0),
    }) : super(key: key);
  
    @override
    Widget build(BuildContext context) {
      return Container(
          padding: padding,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(8),
            color: Colors.white,
          ),
          child: child);
    }
  }
  