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// Copyright 2015 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 'package:flutter/services.dart';
class _ContactCategory extends StatelessWidget {
const _ContactCategory({ Key key, this.icon, this.children }) : super(key: key);
final IconData icon;
final List<Widget> children;
@override
Widget build(BuildContext context) {
final ThemeData themeData = Theme.of(context);
return Container(
padding: const EdgeInsets.symmetric(vertical: 16.0),
decoration: BoxDecoration(
border: Border(bottom: BorderSide(color: themeData.dividerColor))
),
child: DefaultTextStyle(
style: Theme.of(context).textTheme.subhead,
child: SafeArea(
top: false,
bottom: false,
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Container(
padding: const EdgeInsets.symmetric(vertical: 24.0),
width: 72.0,
child: Icon(icon, color: themeData.primaryColor)
),
Expanded(child: Column(children: children))
],
),
),
),
);
}
}
class _ContactItem extends StatelessWidget {
_ContactItem({ Key key, this.icon, this.lines, this.tooltip, this.onPressed })
: assert(lines.length > 1),
super(key: key);
final IconData icon;
final List<String> lines;
final String tooltip;
final VoidCallback onPressed;
@override
Widget build(BuildContext context) {
final ThemeData themeData = Theme.of(context);
final List<Widget> columnChildren = lines.sublist(0, lines.length - 1).map<Widget>((String line) => Text(line)).toList();
columnChildren.add(Text(lines.last, style: themeData.textTheme.caption));
final List<Widget> rowChildren = <Widget>[
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: columnChildren
)
)
];
if (icon != null) {
rowChildren.add(SizedBox(
width: 72.0,
child: IconButton(
icon: Icon(icon),
color: themeData.primaryColor,
onPressed: onPressed
)
));
}
return MergeSemantics(
child: Padding(
padding: const EdgeInsets.symmetric(vertical: 16.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: rowChildren
)
),
);
}
}
class ContactsDemo extends StatefulWidget {
static const String routeName = '/contacts';
@override
ContactsDemoState createState() => ContactsDemoState();
}
enum AppBarBehavior { normal, pinned, floating, snapping }
class ContactsDemoState extends State<ContactsDemo> {
static final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
final double _appBarHeight = 256.0;
AppBarBehavior _appBarBehavior = AppBarBehavior.pinned;
@override
Widget build(BuildContext context) {
return Theme(
data: ThemeData(
brightness: Brightness.light,
primarySwatch: Colors.indigo,
platform: Theme.of(context).platform,
),
child: Scaffold(
key: _scaffoldKey,
body: CustomScrollView(
slivers: <Widget>[
SliverAppBar(
expandedHeight: _appBarHeight,
pinned: _appBarBehavior == AppBarBehavior.pinned,
floating: _appBarBehavior == AppBarBehavior.floating || _appBarBehavior == AppBarBehavior.snapping,
snap: _appBarBehavior == AppBarBehavior.snapping,
actions: <Widget>[
IconButton(
icon: const Icon(Icons.create),
tooltip: 'Edit',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text("Editing isn't supported in this screen.")
));
},
),
PopupMenuButton<AppBarBehavior>(
onSelected: (AppBarBehavior value) {
setState(() {
_appBarBehavior = value;
});
},
itemBuilder: (BuildContext context) => <PopupMenuItem<AppBarBehavior>>[
const PopupMenuItem<AppBarBehavior>(
value: AppBarBehavior.normal,
child: Text('App bar scrolls away')
),
const PopupMenuItem<AppBarBehavior>(
value: AppBarBehavior.pinned,
child: Text('App bar stays put')
),
const PopupMenuItem<AppBarBehavior>(
value: AppBarBehavior.floating,
child: Text('App bar floats')
),
const PopupMenuItem<AppBarBehavior>(
value: AppBarBehavior.snapping,
child: Text('App bar snaps')
),
],
),
],
flexibleSpace: FlexibleSpaceBar(
title: const Text('Ali Connors'),
background: Stack(
fit: StackFit.expand,
children: <Widget>[
Image.asset(
'people/ali_landscape.png',
package: 'flutter_gallery_assets',
fit: BoxFit.cover,
height: _appBarHeight,
),
// This gradient ensures that the toolbar icons are distinct
// against the background image.
const DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
begin: Alignment(0.0, -1.0),
end: Alignment(0.0, -0.4),
colors: <Color>[Color(0x60000000), Color(0x00000000)],
),
),
),
],
),
),
),
SliverList(
delegate: SliverChildListDelegate(<Widget>[
AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle.dark,
child: _ContactCategory(
icon: Icons.call,
children: <Widget>[
_ContactItem(
icon: Icons.message,
tooltip: 'Send message',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('Pretend that this opened your SMS application.')
));
},
lines: const <String>[
'(650) 555-1234',
'Mobile',
],
),
_ContactItem(
icon: Icons.message,
tooltip: 'Send message',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('A messaging app appears.')
));
},
lines: const <String>[
'(323) 555-6789',
'Work',
],
),
_ContactItem(
icon: Icons.message,
tooltip: 'Send message',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('Imagine if you will, a messaging application.')
));
},
lines: const <String>[
'(650) 555-6789',
'Home',
],
),
],
),
),
_ContactCategory(
icon: Icons.contact_mail,
children: <Widget>[
_ContactItem(
icon: Icons.email,
tooltip: 'Send personal e-mail',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('Here, your e-mail application would open.')
));
},
lines: const <String>[
'ali_connors@example.com',
'Personal',
],
),
_ContactItem(
icon: Icons.email,
tooltip: 'Send work e-mail',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('Summon your favorite e-mail application here.')
));
},
lines: const <String>[
'aliconnors@example.com',
'Work',
],
),
],
),
_ContactCategory(
icon: Icons.location_on,
children: <Widget>[
_ContactItem(
icon: Icons.map,
tooltip: 'Open map',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('This would show a map of San Francisco.')
));
},
lines: const <String>[
'2000 Main Street',
'San Francisco, CA',
'Home',
],
),
_ContactItem(
icon: Icons.map,
tooltip: 'Open map',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('This would show a map of Mountain View.')
));
},
lines: const <String>[
'1600 Amphitheater Parkway',
'Mountain View, CA',
'Work',
],
),
_ContactItem(
icon: Icons.map,
tooltip: 'Open map',
onPressed: () {
_scaffoldKey.currentState.showSnackBar(const SnackBar(
content: Text('This would also show a map, if this was not a demo.')
));
},
lines: const <String>[
'126 Severyns Ave',
'Mountain View, CA',
'Jet Travel',
],
),
],
),
_ContactCategory(
icon: Icons.today,
children: <Widget>[
_ContactItem(
lines: const <String>[
'Birthday',
'January 9th, 1989',
],
),
_ContactItem(
lines: const <String>[
'Wedding anniversary',
'June 21st, 2014',
],
),
_ContactItem(
lines: const <String>[
'First day in office',
'January 20th, 2015',
],
),
_ContactItem(
lines: const <String>[
'Last day in office',
'August 9th, 2018',
],
),
],
),
]),
),
],
),
),
);
}
}