Use flutter_custom_toolbox for common features

lib/models/settings/settings_global.dart

+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:calculus/config/default_global_settings.dart';
-import 'package:calculus/utils/tools.dart';
 
 class GlobalSettings {
   String skin;

lib/ui/game/game_end.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
 import 'package:calculus/models/game/game.dart';

lib/ui/helpers/app_titles.dart

-import 'package:easy_localization/easy_localization.dart';
-import 'package:flutter/material.dart';
-
-class AppHeader extends StatelessWidget {
-  const AppHeader({super.key, required this.text});
-
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    return Text(
-      tr(text),
-      textAlign: TextAlign.start,
-      style: Theme.of(context).textTheme.headlineMedium!.apply(fontWeightDelta: 2),
-    );
-  }
-}
-
-class AppTitle extends StatelessWidget {
-  const AppTitle({super.key, required this.text});
-
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    return Text(
-      tr(text),
-      textAlign: TextAlign.start,
-      style: Theme.of(context).textTheme.titleLarge!.apply(fontWeightDelta: 2),
-    );
-  }
-}

lib/ui/helpers/outlined_text_widget.dart

-import 'package:flutter/material.dart';
-
-import 'package:calculus/utils/color_extensions.dart';
-
-class OutlinedText extends StatelessWidget {
-  const OutlinedText({
-    super.key,
-    required this.text,
-    required this.fontSize,
-    required this.textColor,
-    this.outlineColor,
-  });
-
-  final String text;
-  final double fontSize;
-  final Color textColor;
-  final Color? outlineColor;
-
-  @override
-  Widget build(BuildContext context) {
-    final double delta = fontSize / 30;
-
-    return Text(
-      text,
-      style: TextStyle(
-        inherit: true,
-        fontSize: fontSize,
-        fontWeight: FontWeight.w600,
-        color: textColor,
-        shadows: [
-          Shadow(
-            offset: Offset(-delta, -delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(delta, -delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(delta, delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(-delta, delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-        ],
-      ),
-    );
-  }
-}

lib/ui/helpers/styled_button.dart

-import 'package:auto_size_text/auto_size_text.dart';
-import 'package:flutter/material.dart';
-
-import 'package:calculus/utils/color_extensions.dart';
-
-class StyledButton extends StatelessWidget {
-  const StyledButton({
-    super.key,
-    required this.color,
-    required this.onPressed,
-    this.onLongPress,
-    required this.child,
-  });
-
-  final Color color;
-  final VoidCallback? onPressed;
-  final VoidCallback? onLongPress;
-  final Widget child;
-
-  factory StyledButton.text({
-    Key? key,
-    required VoidCallback? onPressed,
-    VoidCallback? onLongPress,
-    required String caption,
-    required Color color,
-  }) {
-    final Widget captionWidget = AutoSizeText(
-      caption,
-      maxLines: 1,
-      style: TextStyle(
-        inherit: true,
-        fontWeight: FontWeight.w900,
-        color: color.darken(60),
-        shadows: [
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, -2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, -2),
-          ),
-        ],
-      ),
-    );
-
-    return StyledButton(
-      color: color,
-      onPressed: onPressed,
-      onLongPress: onLongPress,
-      child: captionWidget,
-    );
-  }
-
-  factory StyledButton.icon({
-    Key? key,
-    required VoidCallback? onPressed,
-    VoidCallback? onLongPress,
-    required Icon icon,
-    required Color color,
-    required double iconSize,
-  }) {
-    return StyledButton(
-      color: color,
-      onPressed: onPressed,
-      onLongPress: onLongPress,
-      child: Icon(
-        icon.icon,
-        color: icon.color ?? color.darken(60),
-        size: iconSize,
-        shadows: [
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, -2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, -2),
-          ),
-        ],
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    const double borderWidth = 4;
-    final Color borderColor = color.darken(40);
-    const double borderRadius = 10;
-
-    return Container(
-      margin: const EdgeInsets.all(2),
-      padding: const EdgeInsets.all(2),
-      decoration: BoxDecoration(
-        color: color,
-        border: Border.all(
-          color: borderColor,
-          width: borderWidth,
-        ),
-        borderRadius: BorderRadius.circular(borderRadius),
-      ),
-      child: CustomPaint(
-        painter: StyledButtonPainter(
-          baseColor: color,
-        ),
-        child: MaterialButton(
-          onPressed: onPressed,
-          onLongPress: onLongPress,
-          padding: const EdgeInsets.all(8),
-          materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
-          minWidth: 40,
-          child: child,
-        ),
-      ),
-    );
-  }
-}
-
-class StyledButtonPainter extends CustomPainter {
-  StyledButtonPainter({
-    required this.baseColor,
-  });
-
-  final Color baseColor;
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    final Color lightColor = baseColor.lighten(20);
-    final Color darkColor = baseColor.darken(20);
-
-    final Paint paint = Paint()..style = PaintingStyle.fill;
-
-    const double cornerRadius = 6;
-
-    Path topPath = Path()
-      ..moveTo(cornerRadius, 0)
-      ..lineTo(size.width - cornerRadius, 0)
-      ..arcToPoint(
-        Offset(size.width, cornerRadius),
-        radius: const Radius.circular(cornerRadius),
-      )
-      ..lineTo(size.width, size.height * .35)
-      ..quadraticBezierTo(
-        size.width * .4,
-        size.height * .1,
-        0,
-        size.height * .3,
-      )
-      ..lineTo(0, cornerRadius)
-      ..arcToPoint(
-        const Offset(cornerRadius, 0),
-        radius: const Radius.circular(cornerRadius),
-      );
-
-    Path bottomPath = Path()
-      ..moveTo(cornerRadius, size.height)
-      ..lineTo(size.width - cornerRadius, size.height)
-      ..arcToPoint(
-        Offset(size.width, size.height - cornerRadius),
-        radius: const Radius.circular(cornerRadius),
-        clockwise: false,
-      )
-      ..lineTo(size.width, size.height * .7)
-      ..quadraticBezierTo(
-        size.width * .6,
-        size.height * .9,
-        0,
-        size.height * .7,
-      )
-      ..lineTo(0, size.height - cornerRadius)
-      ..arcToPoint(
-        Offset(cornerRadius, size.height),
-        radius: const Radius.circular(cornerRadius),
-        clockwise: false,
-      );
-
-    paint.color = lightColor;
-    canvas.drawPath(topPath, paint);
-
-    paint.color = darkColor;
-    canvas.drawPath(bottomPath, paint);
-  }
-
-  @override
-  bool shouldRepaint(CustomPainter oldDelegate) => false;
-}

lib/ui/layouts/game_layout.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
 import 'package:calculus/models/game/game.dart';

lib/ui/layouts/parameters_layout.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/config/default_game_settings.dart';
 import 'package:calculus/config/default_global_settings.dart';

lib/ui/parameters/parameter_painter.dart

 import 'dart:math';
 
 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/config/default_game_settings.dart';
 import 'package:calculus/models/settings/settings_game.dart';
 import 'package:calculus/models/settings/settings_global.dart';
-import 'package:calculus/utils/tools.dart';
 
 class ParameterPainter extends CustomPainter {
   const ParameterPainter({

lib/ui/parameters/parameter_widget.dart

 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/config/default_game_settings.dart';
 import 'package:calculus/config/default_global_settings.dart';
 import 'package:calculus/models/settings/settings_game.dart';
 import 'package:calculus/models/settings/settings_global.dart';
-import 'package:calculus/ui/helpers/styled_button.dart';
 import 'package:calculus/ui/parameters/parameter_painter.dart';
-import 'package:calculus/utils/tools.dart';
 
 class ParameterWidget extends StatelessWidget {
   const ParameterWidget({

lib/ui/screens/page_about.dart

-import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
-import 'package:package_info_plus/package_info_plus.dart';
-
-import 'package:calculus/ui/helpers/app_titles.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 class PageAbout extends StatelessWidget {
   const PageAbout({super.key});

lib/ui/screens/page_game.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
 import 'package:calculus/models/game/game.dart';

lib/ui/screens/page_settings.dart

 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:calculus/ui/helpers/app_titles.dart';
 import 'package:calculus/ui/settings/settings_form.dart';
 
 class PageSettings extends StatelessWidget {

lib/ui/settings/settings_form.dart

-import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
-import 'package:unicons/unicons.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/ui/settings/theme_card.dart';
 

lib/ui/settings/theme_card.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/theme_cubit.dart';
 

lib/ui/skeleton.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/config/menu.dart';
 import 'package:calculus/cubit/nav_cubit.dart';

lib/ui/widgets/actions/button_delete_saved_game.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
-import 'package:calculus/ui/helpers/styled_button.dart';
 
 class DeleteSavedGameButton extends StatelessWidget {
   const DeleteSavedGameButton({super.key});

lib/ui/widgets/actions/button_game_quit.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
-import 'package:calculus/ui/helpers/styled_button.dart';
 
 class QuitGameButton extends StatelessWidget {
   const QuitGameButton({super.key});

lib/ui/widgets/actions/button_game_start_new.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
 import 'package:calculus/cubit/settings_game_cubit.dart';
 import 'package:calculus/cubit/settings_global_cubit.dart';
-import 'package:calculus/ui/helpers/styled_button.dart';
 
 class StartNewGameButton extends StatelessWidget {
   const StartNewGameButton({super.key});

lib/ui/widgets/actions/button_resume_saved_game.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
-import 'package:calculus/ui/helpers/styled_button.dart';
 
 class ResumeSavedGameButton extends StatelessWidget {
   const ResumeSavedGameButton({super.key});

lib/ui/widgets/game/game_board.dart

 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:calculus/cubit/game_cubit.dart';
 import 'package:calculus/models/game/game.dart';