blob: 144cfdf48fbe9e3b38798a34dd4ac5ff336f7fae [file] [log] [blame]
// 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/gestures.dart';
import 'package:flutter/foundation.dart' show defaultTargetPlatform;
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
class _LinkTextSpan extends TextSpan {
// Beware!
//
// This class is only safe because the TapGestureRecognizer is not
// given a deadline and therefore never allocates any resources.
//
// In any other situation -- setting a deadline, using any of the less trivial
// recognizers, etc -- you would have to manage the gesture recognizer's
// lifetime and call dispose() when the TextSpan was no longer being rendered.
//
// Since TextSpan itself is @immutable, this means that you would have to
// manage the recognizer from outside the TextSpan, e.g. in the State of a
// stateful widget that then hands the recognizer to the TextSpan.
_LinkTextSpan({ TextStyle style, String url, String text }) : super(
style: style,
text: text ?? url,
recognizer: TapGestureRecognizer()..onTap = () {
launch(url, forceSafariVC: false);
}
);
}
void showGalleryAboutDialog(BuildContext context) {
final ThemeData themeData = Theme.of(context);
final TextStyle aboutTextStyle = themeData.textTheme.bodyText1;
final TextStyle linkStyle = themeData.textTheme.bodyText1.copyWith(color: themeData.accentColor);
showAboutDialog(
context: context,
applicationVersion: 'January 2019',
applicationIcon: const FlutterLogo(),
applicationLegalese: '© 2014 The Flutter Authors',
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 24.0),
child: RichText(
text: TextSpan(
children: <TextSpan>[
TextSpan(
style: aboutTextStyle,
text: 'Flutter is an open-source project to help developers '
'build high-performance, high-fidelity, mobile apps for '
'${defaultTargetPlatform == TargetPlatform.iOS ? 'multiple platforms' : 'iOS and Android'} '
'from a single codebase. This design lab is a playground '
"and showcase of Flutter's many widgets, behaviors, "
'animations, layouts, and more. Learn more about Flutter at ',
),
_LinkTextSpan(
style: linkStyle,
url: 'https://flutter.dev',
),
TextSpan(
style: aboutTextStyle,
text: '.\n\nTo see the source code for this app, please visit the ',
),
_LinkTextSpan(
style: linkStyle,
url: 'https://goo.gl/iv1p4G',
text: 'flutter github repo',
),
TextSpan(
style: aboutTextStyle,
text: '.',
),
],
),
),
),
],
);
}