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159 | class ListItem {
int value;
String name;
ListItem(this.value, this.name);
}
class AppUsersScreen extends StatefulWidget {
const AppDashboardUsersScreen();
@override
_AppDashboardUsersScreenState createState() =>
_AppDashboardUsersScreenState();
}
class _AppDashboardUsersScreenState extends State<AppDashboardUsersScreen> {
final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
List selectedUsers = [];
List<ListItem> _dropdownItems = [
ListItem(1, "Select Action"),
ListItem(2, "Mark as verified"),
ListItem(3, "Block User(s)"),
ListItem(4, "Delete User(s)"),
];
List<DropdownMenuItem<ListItem>> _dropdownMenuItems;
ListItem _selectedItem;
@override
void initState() {
_dropdownMenuItems = buildDropDownMenuItems(_dropdownItems);
_selectedItem = _dropdownMenuItems[0].value;
super.initState();
}
@override
void dispose() {
super.dispose();
}
Future<void> _refreshpage() async {
setState(() {});
}
/**
* Add/Remove Subscribed keyword
*/
void onUserSelected(bool selected, uid) {
if (selected == true) {
setState(() {
selectedUsers.add(uid);
});
}
}
List<DropdownMenuItem<ListItem>> buildDropDownMenuItems(List listItems) {
List<DropdownMenuItem<ListItem>> items = List();
for (ListItem listItem in listItems) {
items.add(
DropdownMenuItem(
child: Text(listItem.name),
value: listItem,
),
);
}
return items;
}
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,
appBar: appBarBack(context, Theme.of(context).primaryColor),
body: RefreshIndicator(
onRefresh: _refreshpage,
child: Padding(
padding: EdgeInsets.all(8),
child: Column(
children: [
Row(
children: [
Text(
'Count',
style: Theme.of(context).textTheme.headline6,
),
Spacer(),
Text('Users', style: Theme.of(context).textTheme.headline6),
Spacer(),
DropdownButton<ListItem>(
value: _selectedItem,
items: _dropdownMenuItems,
onChanged: (value) {
setState(() {
_selectedItem = value;
});
print(_selectedItem.name);
}),
],
),
Expanded(
child: StreamBuilder(
stream: Collection<UserModel>(path: 'users')
.streamData(),
builder: (context, snapshot) {
if (snapshot.hasError) {
return UIErrorsMessages.somethingIsNotRightCard(context);
}
switch (snapshot.connectionState) {
case ConnectionState.waiting:
return Container(
color: Theme.of(context).backgroundColor,
child: new Center(
child: new CircularProgressIndicator(
backgroundColor: Theme.of(context).backgroundColor,
valueColor: AlwaysStoppedAnimation(
Theme.of(context).accentColor),
)),
);
default:
if (snapshot.data != null) {
return ListView.builder(
shrinkWrap: true,
primary: true,
physics: AlwaysScrollableScrollPhysics(),
itemCount: snapshot.data.length,
itemBuilder: (context, index) {
UserModel user = snapshot.data[index];
return CheckboxListTile(
activeColor: Theme.of(context).accentColor,
title: Text(user.getFullName()),
value: selectedUsers.contains(user.uid),
onChanged: (bool selected) {
//onUserSelected(selected, user.uid);
if (selected == true) {
setState(() {
selectedUsers.add(user.uid);
});
}
},
secondary: Text((index + 1).toString()),
);
});
} else {
return Center(
child: Text('No Users'),
);
}
}
},
),
),
],
),
),
),
);
}
}
|
It's actually quite easy to achieve these. Below is the code that works perfectly in such a situation: