mirror of
https://github.com/flutter/flutter
synced 2024-10-13 11:42:54 +00:00
81 lines
2.2 KiB
Dart
81 lines
2.2 KiB
Dart
// Copyright 2014 The Flutter 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';
|
|
import 'package:flutter_driver/driver_extension.dart';
|
|
|
|
/// This sample application creates a hard to render frame, causing the
|
|
/// driver script to race the raster thread. If the driver script wins the
|
|
/// race, it will screenshot the previous frame. If the raster thread wins
|
|
/// it, it will screenshot the latest frame.
|
|
void main() {
|
|
enableFlutterDriverExtension();
|
|
|
|
runApp(Toggler());
|
|
}
|
|
|
|
class Toggler extends StatefulWidget {
|
|
@override
|
|
State<Toggler> createState() => TogglerState();
|
|
}
|
|
|
|
class TogglerState extends State<Toggler> {
|
|
bool _visible = false;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return MaterialApp(
|
|
home: Scaffold(
|
|
appBar: AppBar(
|
|
title: const Text('FlutterDriver test'),
|
|
),
|
|
body: Material(
|
|
child: Column(
|
|
children: <Widget>[
|
|
TextButton(
|
|
key: const ValueKey<String>('toggle'),
|
|
child: const Text('Toggle visibility'),
|
|
onPressed: () {
|
|
setState(() {
|
|
_visible = !_visible;
|
|
});
|
|
},
|
|
),
|
|
Expanded(
|
|
child: ListView(
|
|
children: _buildRows(_visible ? 10 : 0),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
List<Widget> _buildRows(int count) {
|
|
return List<Widget>.generate(count, (int i) {
|
|
return Row(
|
|
children: _buildCells(i / count),
|
|
);
|
|
});
|
|
}
|
|
|
|
/// Builds cells that are known to take time to render causing a delay on the
|
|
/// raster thread.
|
|
List<Widget> _buildCells(double epsilon) {
|
|
return List<Widget>.generate(15, (int i) {
|
|
return Expanded(
|
|
child: Material(
|
|
// A magic color that the test will be looking for on the screenshot.
|
|
color: const Color(0xffff0102),
|
|
borderRadius: BorderRadius.all(Radius.circular(i.toDouble() + epsilon)),
|
|
elevation: 5.0,
|
|
child: const SizedBox(height: 10.0, width: 10.0),
|
|
),
|
|
);
|
|
});
|
|
}
|