// Copyright (c) 2021 Razeware LLC // // 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. // // Notwithstanding the foregoing, you may not use, copy, modify, merge, publish, // distribute, sublicense, create a derivative work, and/or sell copies of the // Software in any work that is designed, intended, or marketed for pedagogical // or instructional purposes related to programming, coding, application // development, or information technology. Permission for such use, copying, // modification, merger, publication, distribution, sublicensing, creation of // derivative works, or sale is expressly withheld. // // 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 'package:flutter/material.dart'; class OvalPainter extends CustomPainter { @override void paint(Canvas canvas, Size size) { final paint = Paint() ..strokeWidth = 4 ..color = Colors.blueAccent ..style = PaintingStyle.stroke; const circleRadius = 75.0; const circleCenter = Offset(200, 150); canvas.drawCircle(circleCenter, circleRadius, paint); const ovalCenter = Offset(200, 275); final oval = Rect.fromCenter(center: ovalCenter, width: 250, height: 100); canvas.drawOval(oval, paint); var concentricCircleRadius = 100.0; const center = Offset(200, 500); while (concentricCircleRadius > 0) { canvas.drawCircle(center, concentricCircleRadius, paint); concentricCircleRadius -= 10; } } @override bool shouldRepaint(covariant CustomPainter oldDelegate) => false; }