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This example shows how to draw a circle using subclasses of RenderNode. R=ianh@google.com Review URL: https://codereview.chromium.org/1144193004
22 lines
694 B
Dart
22 lines
694 B
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:math';
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import 'dart:sky';
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import 'package:sky/framework/layout2.dart';
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class RenderBlueCircle extends RenderBox {
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void paint(RenderNodeDisplayList canvas) {
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double radius = min(width, height) * 0.45;
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Paint paint = new Paint()..setARGB(255, 0, 255, 255);
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canvas.drawCircle(width / 2, height / 2, radius, paint);
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}
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}
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void main() {
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RenderView renderView = new RenderView(root: new RenderBlueCircle());
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renderView.layout(newWidth: view.width, newHeight: view.height);
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renderView.paintFrame();
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}
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