zhiying_comm/lib/util/color.dart

/*
 * @Author: your name
 * @Date: 2020-05-18 14:01:56
 * @LastEditTime: 2020-06-24 13:45:26
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: /hairuyi_flutter_yunfadan/lib/utils/color.dart
 */

import 'dart:ui';
import 'dart:math';

extension HexColor on Color {
  /// String is in the format "aabbcc" or "ffaabbcc" with an optional leading "#".
  static Color fromHex(String hexString) {
    final buffer = StringBuffer();
    if (hexString.length == 6 || hexString.length == 7) buffer.write('ff');
    buffer.write(hexString.replaceFirst('#', ''));
    return Color(int.parse(buffer.toString(), radix: 16));
  }

  static Color random() {
    return Color(Random().nextInt(1 << 32));
  }

  /// Prefixes a hash sign if [leadingHashSign] is set to `true` (default is `true`).
  String toHex({bool leadingHashSign = true}) => '${leadingHashSign ? '#' : ''}'
      '${alpha.toRadixString(16).padLeft(2, '0')}'
      '${red.toRadixString(16).padLeft(2, '0')}'
      '${green.toRadixString(16).padLeft(2, '0')}'
      '${blue.toRadixString(16).padLeft(2, '0')}';
}