| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This example shows how to build a render tree with a non-cartesian coordinate |
| // system. Most of the guts of this examples are in src/sector_layout.dart. |
| |
| import 'package:flutter/rendering.dart'; |
| import 'src/sector_layout.dart'; |
| |
| RenderBox buildSectorExample() { |
| final RenderSectorRing rootCircle = RenderSectorRing(padding: 20.0); |
| rootCircle.add(RenderSolidColor(const Color(0xFF00FFFF), desiredDeltaTheta: kTwoPi * 0.15)); |
| rootCircle.add(RenderSolidColor(const Color(0xFF0000FF), desiredDeltaTheta: kTwoPi * 0.4)); |
| final RenderSectorSlice stack = RenderSectorSlice(padding: 2.0); |
| stack.add(RenderSolidColor(const Color(0xFFFFFF00), desiredDeltaRadius: 20.0)); |
| stack.add(RenderSolidColor(const Color(0xFFFF9000), desiredDeltaRadius: 20.0)); |
| stack.add(RenderSolidColor(const Color(0xFF00FF00))); |
| rootCircle.add(stack); |
| return RenderBoxToRenderSectorAdapter(innerRadius: 50.0, child: rootCircle); |
| } |
| |
| void main() { |
| RenderingFlutterBinding(root: buildSectorExample()); |
| } |