1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
// 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.demoWidget,
this.exampleCodeTag,
this.description,
this.tabName
});
final Widget demoWidget;
final String exampleCodeTag;
final String description;
final String tabName;
@override
bool operator==(Object other) {
if (other.runtimeType != runtimeType)
return false;
final ComponentDemoTabData typedOther = other;
return typedOther.tabName == tabName && typedOther.description == description;
}
@override
int get hashCode => hashValues(tabName.hashCode, description.hashCode);
}
class TabbedComponentDemoScaffold extends StatelessWidget {
const TabbedComponentDemoScaffold({
this.title,
this.demos,
this.actions,
});
final List<ComponentDemoTabData> demos;
final String title;
final List<Widget> actions;
void _showExampleCode(BuildContext context) {
final 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: (actions ?? <Widget>[])..addAll(
<Widget>[
new Builder(
builder: (BuildContext context) {
return new IconButton(
icon: const 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 SafeArea(
top: false,
bottom: false,
child: 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.demoWidget)
],
),
);
}).toList(),
),
),
);
}
}
class FullScreenCodeDialog extends StatefulWidget {
const FullScreenCodeDialog({ this.exampleCodeTag });
final String exampleCodeTag;
@override
FullScreenCodeDialogState createState() => new FullScreenCodeDialogState();
}
class FullScreenCodeDialogState extends State<FullScreenCodeDialog> {
String _exampleCode;
@override
void didChangeDependencies() {
getExampleCode(widget.exampleCodeTag, DefaultAssetBundle.of(context)).then<Null>((String code) {
if (mounted) {
setState(() {
_exampleCode = code ?? 'Example code not found';
});
}
});
super.didChangeDependencies();
}
@override
Widget build(BuildContext context) {
final SyntaxHighlighterStyle style = Theme.of(context).brightness == Brightness.dark
? SyntaxHighlighterStyle.darkThemeStyle()
: SyntaxHighlighterStyle.lightThemeStyle();
Widget body;
if (_exampleCode == null) {
body = const Center(
child: const CircularProgressIndicator()
);
} else {
body = new SingleChildScrollView(
child: new Padding(
padding: const EdgeInsets.all(16.0),
child: new RichText(
text: new TextSpan(
style: const TextStyle(fontFamily: 'monospace', fontSize: 10.0),
children: <TextSpan>[
new DartSyntaxHighlighter(style).format(_exampleCode)
]
)
)
)
);
}
return new Scaffold(
appBar: new AppBar(
leading: new IconButton(
icon: const Icon(
Icons.clear,
semanticLabel: 'Close',
),
onPressed: () { Navigator.pop(context); }
),
title: const Text('Example code')
),
body: body
);
}
}