Hand Cursor for Flutter Web - Simply wrap your buttons with it - by Simon Lightfoot - 14/05/2020

hand_cursor.dart

// MIT License
//
// Copyright (c) 2020 Simon Lightfoot
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
import 'dart:html' as html;

import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

class HandCursor extends StatelessWidget {
  const HandCursor({
    Key key,
    this.onHover,
    this.enabled = true,
    @required this.child,
  }) : super(key: key);

  final ValueChanged<bool> onHover;
  final bool enabled;
  final Widget child;

  void _onHover(PointerHoverEvent evt) {
    html.window.document.documentElement.style.cursor = 'pointer';
    onHover?.call(true);
  }

  void _onExit(PointerExitEvent evt) {
    html.window.document.documentElement.style.cursor = 'auto';
    onHover?.call(false);
  }

  @override
  Widget build(BuildContext context) {
    return MouseRegion(
      onHover: enabled ? _onHover : null,
      onExit: enabled ? _onExit : null,
      child: child,
    );
  }
}