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// Copyright 2016 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';
import 'example_code_parser.dart';
import 'syntax_highlighter.dart';
class ComponentDemoTabData {
ComponentDemoTabData({
this.widget,
this.exampleCodeTag,
this.description,
this.tabName
});
final Widget widget;
final String exampleCodeTag;
final String description;
final String tabName;
@override
bool operator==(Object other) {
if (other.runtimeType != runtimeType)
return false;
ComponentDemoTabData typedOther = other;
return typedOther.tabName == tabName && typedOther.description == description;
}
@override
int get hashCode => hashValues(tabName.hashCode, description.hashCode);
}
class TabbedComponentDemoScaffold extends StatelessWidget {
TabbedComponentDemoScaffold({
this.title,
this.demos
});
final List<ComponentDemoTabData> demos;
final String title;
void _showExampleCode(BuildContext context) {
String tag = demos[DefaultTabController.of(context).index].exampleCodeTag;
if (tag != null) {
Navigator.push(context, new MaterialPageRoute<FullScreenCodeDialog>(
builder: (BuildContext context) => new FullScreenCodeDialog(exampleCodeTag: tag)
));
}
}
@override
Widget build(BuildContext context) {
return new DefaultTabController(
length: demos.length,
child: new Scaffold(
appBar: new AppBar(
title: new Text(title),
actions: <Widget>[
new Builder(
builder: (BuildContext context) {
return new IconButton(
icon: new Icon(Icons.description),
tooltip: 'Show example code',
onPressed: () {
_showExampleCode(context);
},
);
},
),
],
bottom: new TabBar(
isScrollable: true,
tabs: demos.map((ComponentDemoTabData data) => new Tab(text: data.tabName)).toList(),
),
),
body: new TabBarView(
children: demos.map((ComponentDemoTabData demo) {
return new Column(
children: <Widget>[
new Padding(
padding: const EdgeInsets.all(16.0),
child: new Text(demo.description,
style: Theme.of(context).textTheme.subhead
)
),
new Expanded(child: demo.widget)
],
);
}).toList(),
),
),
);
}
}
class FullScreenCodeDialog extends StatefulWidget {
FullScreenCodeDialog({ this.exampleCodeTag });
final String exampleCodeTag;
@override
FullScreenCodeDialogState createState() => new FullScreenCodeDialogState();
}
class FullScreenCodeDialogState extends State<FullScreenCodeDialog> {
String _exampleCode;
@override
void dependenciesChanged() {
getExampleCode(config.exampleCodeTag, DefaultAssetBundle.of(context)).then((String code) {
setState(() {
_exampleCode = code;
});
});
super.dependenciesChanged();
}
@override
Widget build(BuildContext context) {
final SyntaxHighlighterStyle style = Theme.of(context).brightness == Brightness.dark
? SyntaxHighlighterStyle.darkThemeStyle()
: SyntaxHighlighterStyle.lightThemeStyle();
Widget body;
if (_exampleCode == null) {
body = new Center(
child: new CircularProgressIndicator()
);
} else {
body = new ScrollableViewport(
child: new Padding(
padding: new EdgeInsets.all(16.0),
child: new RichText(
text: new TextSpan(
style: new TextStyle(fontFamily: 'monospace', fontSize: 10.0),
children: <TextSpan>[
new DartSyntaxHighlighter(style).format(_exampleCode)
]
)
)
)
);
}
return new Scaffold(
appBar: new AppBar(
leading: new IconButton(
icon: new Icon(Icons.clear),
onPressed: () { Navigator.pop(context); }
),
title: new Text('Example code')
),
body: body
);
}
}