examples/rendering/transform.dart

// 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/rendering.dart';

void main() {
  RenderDecoratedBox green = new RenderDecoratedBox(
    decoration: new BoxDecoration(backgroundColor: const ui.Color(0xFF00FF00))
  );
  RenderConstrainedBox box = new RenderConstrainedBox(
    additionalConstraints: new BoxConstraints.tight(const ui.Size(200.0, 200.0)),
    child: green
  );

  Matrix4 transform = new Matrix4.identity();
  RenderTransform spin = new RenderTransform(
    transform: transform,
    child: box
  );
  spin.rotateZ(1.0);

  RenderFlex flex = new RenderFlex();
  flex.add(spin);
  new FlutterBinding(root: flex);
}