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db191e96bd
This patch prepares us to switch to using integers when handing off the animation time from the engine to the framework.
94 lines
3.1 KiB
Dart
94 lines
3.1 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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import 'dart:sky' as sky;
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import 'package:sky/animation.dart';
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import 'package:sky/rendering.dart';
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import 'package:sky/widgets.dart';
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import '../rendering/solid_color_box.dart';
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// Solid colour, RenderObject version
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void addFlexChildSolidColor(RenderFlex parent, sky.Color backgroundColor, { int flex: 0 }) {
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RenderSolidColorBox child = new RenderSolidColorBox(backgroundColor);
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parent.add(child);
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child.parentData.flex = flex;
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}
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// Solid colour, Widget version
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class Rectangle extends Component {
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Rectangle(this.color, { Key key }) : super(key: key);
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final Color color;
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Widget build() {
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return new Flexible(
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child: new Container(
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decoration: new BoxDecoration(backgroundColor: color)
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)
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);
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}
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}
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Widget builder() {
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return new Container(
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height: 300.0,
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child: new Column([
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new Rectangle(const Color(0xFF00FFFF)),
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new Container(
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padding: new EdgeDims.all(10.0),
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margin: new EdgeDims.all(10.0),
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decoration: new BoxDecoration(backgroundColor: const Color(0xFFCCCCCC)),
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child: new RaisedButton(
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child: new Row([
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new NetworkImage(src: "https://www.dartlang.org/logos/dart-logo.png"),
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new Text('PRESS ME'),
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]),
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onPressed: () => print("Hello World")
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)
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),
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new Rectangle(const Color(0xFFFFFF00)),
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],
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justifyContent: FlexJustifyContent.spaceBetween
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)
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);
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}
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Duration timeBase;
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RenderTransform transformBox;
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void rotate(Duration timeStamp) {
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if (timeBase == null)
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timeBase = timeStamp;
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double delta = (timeStamp - timeBase).inMicroseconds.toDouble() / Duration.MICROSECONDS_PER_SECOND; // radians
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transformBox.setIdentity();
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transformBox.translate(transformBox.size.width / 2.0, transformBox.size.height / 2.0);
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transformBox.rotateZ(delta);
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transformBox.translate(-transformBox.size.width / 2.0, -transformBox.size.height / 2.0);
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}
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void main() {
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// Because we're going to use Widgets, we want to initialise its
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// FlutterBinding, not use the default one. We don't really need to do
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// this, because RenderBoxToWidgetAdapter does it for us, but
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// it's good practice in case we happen to not have a
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// RenderBoxToWidgetAdapter in our tree at startup, or in case we
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// want a renderViewOverride.
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WidgetFlutterBinding.initWidgetFlutterBinding();
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RenderProxyBox proxy = new RenderProxyBox();
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new RenderBoxToWidgetAdapter(proxy, builder); // adds itself to proxy
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RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical);
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addFlexChildSolidColor(flexRoot, const sky.Color(0xFFFF00FF), flex: 1);
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flexRoot.add(proxy);
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addFlexChildSolidColor(flexRoot, const sky.Color(0xFF0000FF), flex: 1);
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transformBox = new RenderTransform(child: flexRoot, transform: new Matrix4.identity());
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RenderPadding root = new RenderPadding(padding: new EdgeDims.all(80.0), child: transformBox);
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FlutterBinding.instance.renderView.child = root;
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scheduler.addPersistentFrameCallback(rotate);
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}
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