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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 import 'dart:sky' as sky; |
| 6 import 'dart:math' as math; |
| 7 import 'package:vector_math/vector_math.dart'; |
| 8 import 'package:sky/framework/app.dart'; |
| 9 import 'package:sky/framework/rendering/box.dart'; |
| 10 import 'package:sky/framework/rendering/flex.dart'; |
| 11 import 'package:sky/framework/scheduler.dart'; |
| 12 import '../lib/solid_color_box.dart'; |
| 13 |
| 14 AppView app; |
| 15 double timeBase; |
| 16 RenderTransform transformBox; |
| 17 |
| 18 void main() { |
| 19 RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical); |
| 20 |
| 21 void addFlexChildSolidColor(RenderFlex parent, sky.Color backgroundColor, { in
t flex: 0 }) { |
| 22 RenderSolidColorBox child = new RenderSolidColorBox(backgroundColor); |
| 23 parent.add(child); |
| 24 child.parentData.flex = flex; |
| 25 } |
| 26 |
| 27 addFlexChildSolidColor(flexRoot, const sky.Color(0xFFFF00FF), flex: 1); |
| 28 addFlexChildSolidColor(flexRoot, const sky.Color(0xFFFFFF00), flex: 2); |
| 29 addFlexChildSolidColor(flexRoot, const sky.Color(0xFF00FFFF), flex: 1); |
| 30 |
| 31 transformBox = new RenderTransform(child: flexRoot, transform: new Matrix4.ide
ntity()); |
| 32 |
| 33 RenderPadding root = new RenderPadding(padding: new EdgeDims.all(20.0), child:
transformBox); |
| 34 |
| 35 app = new AppView(root); |
| 36 |
| 37 addPersistentFrameCallback(rotate); |
| 38 } |
| 39 |
| 40 void rotate(double timeStamp) { |
| 41 if (timeBase == null) |
| 42 timeBase = timeStamp; |
| 43 double delta = (timeStamp - timeBase) / 1000; // radians |
| 44 |
| 45 transformBox.setIdentity(); |
| 46 transformBox.translate(transformBox.size.width / 2.0, transformBox.size.height
/ 2.0); |
| 47 transformBox.rotateZ(delta); |
| 48 transformBox.translate(-transformBox.size.width / 2.0, -transformBox.size.heig
ht / 2.0); |
| 49 } |
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