parameter_painter.dart

import 'dart:math';

import 'package:flutter/material.dart';

import 'package:jeweled/config/default_game_settings.dart';
import 'package:jeweled/models/game_settings.dart';
import 'package:jeweled/utils/color_extensions.dart';
import 'package:jeweled/utils/color_theme.dart';

class ParameterPainter extends CustomPainter {
  const ParameterPainter({
    required this.code,
    required this.value,
    required this.isSelected,
    required this.gameSettings,
  });

  final String code;
  final int value;
  final bool isSelected;
  final GameSettings gameSettings;

  @override
  void paint(Canvas canvas, Size size) {
    // force square
    final double canvasSize = min(size.width, size.height);

    const Color borderColorEnabled = Colors.blue;
    const Color borderColorDisabled = Colors.white;

    // "enabled/disabled" border
    final paint = Paint();
    paint.style = PaintingStyle.stroke;
    paint.color = this.isSelected ? borderColorEnabled : borderColorDisabled;
    paint.strokeJoin = StrokeJoin.round;
    paint.strokeWidth = 20 / 100 * canvasSize;
    canvas.drawRect(Rect.fromPoints(Offset(0, 0), Offset(canvasSize, canvasSize)), paint);

    // content
    switch (code) {
      case 'colorsCount':
        paintColorsCountParameterItem(value, canvas, canvasSize);
        break;
      case 'boardSize':
        paintBoardSizeParameterItem(value, canvas, canvasSize);
        break;
      case 'colorsTheme':
        paintColorsThemeParameterItem(value, canvas, canvasSize);
        break;
      default:
        print('Unknown parameter: ' + code + '/' + value.toString());
        paintUnknownParameterItem(value, canvas, canvasSize);
    }
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return false;
  }

  // "unknown" parameter -> simple bock with text
  void paintUnknownParameterItem(final int value, final Canvas canvas, final double size) {
    final textSpan = TextSpan(
      text: '?' + '\n' + value.toString(),
      style: const TextStyle(
        color: Colors.black,
        fontSize: 18,
        fontWeight: FontWeight.bold,
      ),
    );