// Copyright 2015 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'dart:ui' as ui; import 'package:flutter/animation.dart'; import 'package:flutter/material.dart'; import 'package:flutter/rendering.dart'; import 'package:flutter_rendering_examples/solid_color_box.dart'; // Solid colour, RenderObject version void addFlexChildSolidColor(RenderFlex parent, ui.Color backgroundColor, { int flex: 0 }) { RenderSolidColorBox child = new RenderSolidColorBox(backgroundColor); parent.add(child); FlexParentData childParentData = child.parentData; childParentData.flex = flex; } // Solid colour, Widget version class Rectangle extends StatelessComponent { Rectangle(this.color, { Key key }) : super(key: key); final Color color; Widget build(BuildContext context) { return new Flexible( child: new Container( decoration: new BoxDecoration(backgroundColor: color) ) ); } } double value; RenderObjectToWidgetElement<RenderBox> element; void attachWidgetTreeToRenderTree(RenderProxyBox container) { element = new RenderObjectToWidgetAdapter<RenderBox>( container: container, child: new Container( height: 300.0, child: new Column(<Widget>[ new Rectangle(const Color(0xFF00FFFF)), new Container( padding: new EdgeDims.all(10.0), margin: new EdgeDims.all(10.0), decoration: new BoxDecoration(backgroundColor: const Color(0xFFCCCCCC)), child: new Row(<Widget>[ new RaisedButton( child: new Row(<Widget>[ new NetworkImage(src: "http://flutter.io/favicon.ico"), new Text('PRESS ME'), ] ), onPressed: () { value = value == null ? 0.1 : (value + 0.1) % 1.0; attachWidgetTreeToRenderTree(container); } ), new CircularProgressIndicator(value: value), ], justifyContent: FlexJustifyContent.spaceAround ) ), new Rectangle(const Color(0xFFFFFF00)), ], justifyContent: FlexJustifyContent.spaceBetween ) ) ).attachToRenderTree(element); } Duration timeBase; RenderTransform transformBox; void rotate(Duration timeStamp) { if (timeBase == null) timeBase = timeStamp; double delta = (timeStamp - timeBase).inMicroseconds.toDouble() / Duration.MICROSECONDS_PER_SECOND; // radians transformBox.setIdentity(); transformBox.translate(transformBox.size.width / 2.0, transformBox.size.height / 2.0); transformBox.rotateZ(delta); transformBox.translate(-transformBox.size.width / 2.0, -transformBox.size.height / 2.0); } void main() { // Because we're going to use Widgets, we want to ensure we're using a // WidgetFlutterBinding rather than some other kind of binding (e.g. a // straight rendering library FlutterBinding). WidgetFlutterBinding.ensureInitialized(); RenderProxyBox proxy = new RenderProxyBox(); attachWidgetTreeToRenderTree(proxy); RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical); addFlexChildSolidColor(flexRoot, const ui.Color(0xFFFF00FF), flex: 1); flexRoot.add(proxy); addFlexChildSolidColor(flexRoot, const ui.Color(0xFF0000FF), flex: 1); transformBox = new RenderTransform(child: flexRoot, transform: new Matrix4.identity()); RenderPadding root = new RenderPadding(padding: new EdgeDims.all(80.0), child: transformBox); FlutterBinding.instance.renderView.child = root; scheduler.addPersistentFrameCallback(rotate); }