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26 lines
1.1 KiB
Dart
26 lines
1.1 KiB
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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// This example shows how to build a render tree with a non-cartesian coordinate
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// system. Most of the guts of this examples are in src/sector_layout.dart.
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import 'package:flutter/rendering.dart';
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import 'src/sector_layout.dart';
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RenderBox buildSectorExample() {
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final RenderSectorRing rootCircle = RenderSectorRing(padding: 20.0);
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rootCircle.add(RenderSolidColor(const Color(0xFF00FFFF), desiredDeltaTheta: kTwoPi * 0.15));
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rootCircle.add(RenderSolidColor(const Color(0xFF0000FF), desiredDeltaTheta: kTwoPi * 0.4));
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final RenderSectorSlice stack = RenderSectorSlice(padding: 2.0);
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stack.add(RenderSolidColor(const Color(0xFFFFFF00), desiredDeltaRadius: 20.0));
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stack.add(RenderSolidColor(const Color(0xFFFF9000), desiredDeltaRadius: 20.0));
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stack.add(RenderSolidColor(const Color(0xFF00FF00)));
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rootCircle.add(stack);
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return RenderBoxToRenderSectorAdapter(innerRadius: 50.0, child: rootCircle);
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}
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void main() {
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RenderingFlutterBinding(root: buildSectorExample());
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}
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