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156b4220b4
Updates documentation and non-public API to use American spellings for consistency with the rest of the codebase. No changes to behaviour... other than how it's spelt.
109 lines
3.4 KiB
Dart
109 lines
3.4 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 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import '../rendering/src/solid_color_box.dart';
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// Solid color, RenderObject version
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void addFlexChildSolidColor(RenderFlex parent, Color backgroundColor, { int flex = 0 }) {
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final RenderSolidColorBox child = RenderSolidColorBox(backgroundColor);
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parent.add(child);
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final FlexParentData childParentData = child.parentData;
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childParentData.flex = flex;
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}
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// Solid color, Widget version
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class Rectangle extends StatelessWidget {
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const Rectangle(this.color, { Key key }) : super(key: key);
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final Color color;
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@override
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Widget build(BuildContext context) {
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return Expanded(
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child: Container(
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color: color,
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),
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);
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}
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}
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double value;
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RenderObjectToWidgetElement<RenderBox> element;
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BuildOwner owner = BuildOwner();
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void attachWidgetTreeToRenderTree(RenderProxyBox container) {
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element = RenderObjectToWidgetAdapter<RenderBox>(
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container: container,
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child: Directionality(
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textDirection: TextDirection.ltr,
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child: Container(
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height: 300.0,
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child: Column(
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children: <Widget>[
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const Rectangle(Color(0xFF00FFFF)),
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Material(
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child: Container(
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padding: const EdgeInsets.all(10.0),
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margin: const EdgeInsets.all(10.0),
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child: Row(
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children: <Widget>[
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RaisedButton(
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child: Row(
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children: <Widget>[
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Image.network('https://flutter.dev/images/favicon.png'),
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const Text('PRESS ME'),
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],
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),
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onPressed: () {
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value = value == null ? 0.1 : (value + 0.1) % 1.0;
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attachWidgetTreeToRenderTree(container);
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},
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),
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CircularProgressIndicator(value: value),
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],
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mainAxisAlignment: MainAxisAlignment.spaceAround,
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),
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),
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),
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const Rectangle(Color(0xFFFFFF00)),
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],
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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),
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),
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),
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).attachToRenderTree(owner, element);
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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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timeBase ??= timeStamp;
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final double delta = (timeStamp - timeBase).inMicroseconds.toDouble() / Duration.microsecondsPerSecond; // radians
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transformBox.setIdentity();
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transformBox.rotateZ(delta);
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owner.buildScope(element);
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}
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void main() {
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final WidgetsBinding binding = WidgetsFlutterBinding.ensureInitialized();
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final RenderProxyBox proxy = RenderProxyBox();
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attachWidgetTreeToRenderTree(proxy);
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final RenderFlex flexRoot = RenderFlex(direction: Axis.vertical);
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addFlexChildSolidColor(flexRoot, const Color(0xFFFF00FF), flex: 1);
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flexRoot.add(proxy);
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addFlexChildSolidColor(flexRoot, const Color(0xFF0000FF), flex: 1);
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transformBox = RenderTransform(child: flexRoot, transform: Matrix4.identity(), alignment: Alignment.center);
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final RenderPadding root = RenderPadding(padding: const EdgeInsets.all(80.0), child: transformBox);
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binding.renderView.child = root;
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binding.addPersistentFrameCallback(rotate);
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}
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