dev/manual_tests/lib/animated_icons.dart

// Copyright 2018 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 'package:flutter/material.dart';

class AnimatedIconsTestApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Animated Icons Test',
      home: const Scaffold(
        body: const IconsList(),
      ),
    );
  }
}

class IconsList extends StatelessWidget {
  const IconsList();

  @override
  Widget build(BuildContext context) {
    return new ListView(
      children: samples.map((IconSample s) => new IconSampleRow(s)).toList(),
    );
  }
}

class IconSampleRow extends StatefulWidget {
  const IconSampleRow(this.sample);

  final IconSample sample;

  @override
  State createState() => new IconSampleRowState();
}

class IconSampleRowState extends State<IconSampleRow> with SingleTickerProviderStateMixin {
  AnimationController progress;

  @override
  Widget build(BuildContext context) {
    return new ListTile(
      leading: new InkWell(
        onTap: () { progress.forward(from: 0.0); },
        child: new AnimatedIcon(
          icon: widget.sample.icon,
          progress: progress,
          color: Colors.lightBlue,
        ),
      ),
      title: new Text(widget.sample.description),
      subtitle: new Slider(
        value: progress.value,
        onChanged: (double v) { progress.animateTo(v, duration: Duration.ZERO); },
      ),
    );
  }

  @override
  void initState() {
    super.initState();
    progress = new AnimationController(vsync: this, duration: const Duration(milliseconds: 300));
    progress.addListener(_handleChange);
  }

  @override
  void dispose() {
    progress.removeListener(_handleChange);
    super.dispose();
  }

  void _handleChange() {
    setState(() {});
  }
}

const List<IconSample> samples = const <IconSample> [
  const IconSample(AnimatedIcons.arrow_menu, 'arrow_menu'),
  const IconSample(AnimatedIcons.menu_arrow, 'menu_arrow'),
];

class IconSample {
  const IconSample(this.icon, this.description);
  final AnimatedIconData icon;
  final String description;
}

void main() => runApp(new AnimatedIconsTestApp());