Add dark mode to your flutter apps within seconds

README.md

Darkest

Place Darkest widget above widgets (or pages) you want to enable dark mode for. And it magically makes your app use state of art technology powered by latest Machine Learning trends to convert graphics into dark mode compatible style.

Darkest(
  enabled: true,
  child: MyWidget(),
),

darkest.dart

import 'dart:math';

import 'package:flutter/widgets.dart';

class Darkest extends StatelessWidget {
  const Darkest({
    required this.enabled,
    required this.child,
    Key? key,
  }) : super(key: key);

  final bool enabled;
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return enabled ? DarkestCanvas(child: child) : child;
  }
}

class DarkestCanvas extends StatefulWidget {
  const DarkestCanvas({Key? key, required this.child}) : super(key: key);

  final Widget child;

  @override
  _DarkestCanvasState createState() => _DarkestCanvasState();
}

class _DarkestCanvasState extends State<DarkestCanvas> {
  Offset? spotPoint;

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        widget.child,
        Positioned.fill(
          child: GestureDetector(
            behavior: HitTestBehavior.translucent,
            onPanUpdate: (details) {
              setState(() {
                spotPoint = details.localPosition;
              });
            },
            child: MouseRegion(
              opaque: false,
              onHover: (event) {
                setState(() {
                  spotPoint = event.localPosition;
                });
              },
              child: ClipPath(
                clipper: InvertedOvalClip(spotPoint),
                child: Container(color: const Color(0xFF000000)),
              ),
            ),
          ),
        ),
      ],
    );
  }
}

class InvertedOvalClip extends CustomClipper<Path> {
  const InvertedOvalClip(this.spotPoint);

  final Offset? spotPoint;

  @override
  Path getClip(Size size) {
    if (spotPoint == null) {
      return Path()..addRect(Rect.fromLTWH(0, 0, size.width, size.height));
    }

    final radius = min(size.width, size.height) * .3;

    return Path()
      ..addOval(Rect.fromCircle(center: spotPoint!, radius: radius))
      ..addRect(Rect.fromLTWH(0, 0, size.width, size.height))
      ..fillType = PathFillType.evenOdd;
  }

  @override
  bool shouldReclip(covariant InvertedOvalClip oldClipper) {
    return oldClipper.spotPoint != spotPoint;
  }
}