calorimeter/lib/utils/rectangular_notch_shape.dart

/* SPDX-License-Identifier: GPL-3.0-or-later */
import 'package:flutter/material.dart';

class RectangularNotchShape extends NotchedShape {
  const RectangularNotchShape();

  @override
  Path getOuterPath(Rect host, Rect? guest) {
    if (guest == null || !host.overlaps(guest)) {
      return Path()..addRect(host);
    }

    var margin = 20;

    return Path()
      ..moveTo(host.left, host.top)
      ..lineTo(guest.left - margin, host.top)
      ..quadraticBezierTo(guest.left, host.top, guest.left, host.top + margin)
      ..lineTo(guest.left, guest.bottom - margin)
      ..quadraticBezierTo(
          guest.left, guest.bottom, guest.left + margin, guest.bottom)
      ..lineTo(guest.right - margin, guest.bottom)
      ..quadraticBezierTo(
          guest.right, guest.bottom, guest.right, guest.bottom - margin)
      ..lineTo(guest.right, host.top + margin)
      ..quadraticBezierTo(guest.right, host.top, guest.right + margin, host.top)
      ..lineTo(host.right, host.top)
      ..lineTo(host.right, host.bottom)
      ..lineTo(host.left, host.bottom)
      ..close();
  }
}