// Copyright 2015 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:flutter/rendering.dart'; import 'basic.dart'; import 'framework.dart'; class GridPaper extends StatelessComponent { GridPaper({ Key key, this.color: const Color(0xFF000000), this.interval: 100.0 }) : super(key: key); final Color color; final double interval; Widget build(BuildContext context) { return new IgnorePointer(child: new CustomPaint( onPaint: (PaintingCanvas canvas, Size size) { Paint linePaint = new Paint() ..color = color; for (double x = 0.0; x <= size.width; x += interval / 10.0) { linePaint.strokeWidth = (x % interval == 0.0) ? 1.0 : (x % (interval / 2.0) == 0.0) ? 0.5: 0.25; canvas.drawLine(new Point(x, 0.0), new Point(x, size.height), linePaint); } for (double y = 0.0; y <= size.height; y += interval / 10.0) { linePaint.strokeWidth = (y % interval == 0.0) ? 1.0 : (y % (interval / 2.0) == 0.0) ? 0.5: 0.25; canvas.drawLine(new Point(0.0, y), new Point(size.width, y), linePaint); } }) ); } }