flutterdartflutter-layoutdropdown
how to make a button at the bottom of the drop down list
to create the popup list i used dropdown_search
design example as I would like to see it
when I start searching through the elements of the list, a button for adding should pop up
or the button should be immediately when we start searching for the element
drop-down list
button bottom
I chose all possible methods in the library, but still I can't use it with the addition of a button
all code https://github.com/dimapichuev2000/test_dropdownbutton
main.dart
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:dropdown_search/dropdown_search.dart';
import 'package:test_dropdownbutton/gym_model.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData().copyWith(
primaryColor: Colors.amber,
colorScheme: ThemeData().colorScheme.copyWith(
primary: Colors.orange,
),
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final _multiKey = GlobalKey<DropdownSearchState<String>>();
Widget _customDropDownExample(BuildContext context, GymModel? item) {
if (item == null) {
return const Text(
"Выберите фитнесс центр",
style:
TextStyle(fontSize: 15, color: Color.fromRGBO(33, 33, 33, 0.6)),
);
}
return Container(
child: (item.avatar == "")
? ListTile(
contentPadding: EdgeInsets.all(0),
leading: const CircleAvatar(
radius: 25,
backgroundColor: Colors.white,
backgroundImage: NetworkImage(
'https://img.icons8.com/ios/50/000000/gum-.png'),
),
title: Text(item.gym),
subtitle: Text(
item.location,
),
)
: ListTile(
contentPadding: const EdgeInsets.all(0),
leading: CircleAvatar(
radius: 25,
backgroundImage: NetworkImage(item.avatar ?? ''),
),
title: Text(item.gym),
subtitle: Text(
item.location,
),
),
);
}
Widget _exitPopup(BuildContext context) {
return Container(
decoration: const BoxDecoration(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(20),
topRight: Radius.circular(20),
),
),
padding: const EdgeInsets.only(top: 2),
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(
margin: EdgeInsets.all(8),
height: 30,
width: 30,
),
const Text(
"Фитнесс центр",
style: TextStyle(fontSize: 17, fontWeight: FontWeight.w500),
),
IconButton(
icon: Image.asset(
'assets/button_X.png',
width: 25,
height: 25,
fit: BoxFit.fill,
),
iconSize: 25,
onPressed: () {
Navigator.of(context).pop();
},
)
],
),
);
}
Widget _customPopupItemBuilderExample(
BuildContext context, GymModel? item, bool isSelected) {
return Container(
decoration: !isSelected
? null
: BoxDecoration(
borderRadius: BorderRadius.circular(5),
color: Colors.white,
),
child: ListTile(
selected: isSelected,
title: Text(item?.gym ?? ''),
subtitle: Text(item?.location ?? ''),
leading: (item!.avatar == "")
? const CircleAvatar(
radius: 25,
backgroundColor: Colors.white,
backgroundImage: NetworkImage(
'https://img.icons8.com/ios/100/000000/gum-.png'),
)
: CircleAvatar(
radius: 25,
backgroundImage: NetworkImage(item.avatar ?? ''),
)),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Key value Pair - DropdownButton'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Container(
margin: const EdgeInsets.symmetric(vertical: 10, horizontal: 10),
child: SingleChildScrollView(
child: DropdownSearch<GymModel>(
mode: Mode.BOTTOM_SHEET,
showSearchBox: true,
compareFn: (item, selectedItem) => item?.id == selectedItem?.id,
scrollbarProps:ScrollbarProps(
radius: Radius.circular(20),
thickness: 4,
),
onFind: (String? filter) => getData(filter),
dropdownSearchDecoration: const InputDecoration(
filled: true,
fillColor: Color(0xFFE3E3E4),
hintText: "Выберите фитнесс центр",
border: OutlineInputBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
bottomLeft: Radius.circular(10),
bottomRight: Radius.circular(10),
),
borderSide: BorderSide(
width: 0,
style: BorderStyle.none,
),
),
contentPadding: EdgeInsets.fromLTRB(12, 3, 0, 0),
),
popupSafeArea:
const PopupSafeAreaProps(top: true, bottom: true),
// labelText: "Выберите фитнесс центр ",
onChanged: (data) {
print(data);
},
maxHeight: 850,
dropdownBuilder: _customDropDownExample,
popupItemBuilder: _customPopupItemBuilderExample,
dropDownButton: Image.asset('assets/dropButton.png',
color: Color(0xFF79818A)),
popupTitle: _exitPopup(context),
popupShape: const RoundedRectangleBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
),
),
searchFieldProps: TextFieldProps(
decoration: const InputDecoration(
prefixIcon: Icon(
Icons.search,
),
filled: true,
fillColor: Color(0xFFE3E3E4),
border: OutlineInputBorder(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
topRight: Radius.circular(10),
bottomLeft: Radius.circular(10),
bottomRight: Radius.circular(10),
),
borderSide: BorderSide(
width: 0,
style: BorderStyle.none,
),
),
contentPadding: EdgeInsets.fromLTRB(12, 12, 8,0),
// labelText: "Поиск",
hintText: "Поиск",
hintStyle: TextStyle(fontSize: 17)),
),
),
),
),
],
),
),
);
}
Future<List<GymModel>> getData(filter) async {
var response = await Dio().get(
"https://my-json-server.typicode.com/dimapichuev2000/JSON_TEST/posts",
queryParameters: {"filter": filter},
);
final data = response.data;
if (data != null) {
return GymModel.fromJsonList(data);
}
return [];
}
}
gym_model.dart
class GymModel {
final String id;
final String location;
final String gym;
final String? avatar;
GymModel(
{required this.id,
required this.location,
required this.gym,
this.avatar});
factory GymModel.fromJson(Map<String, dynamic> json) {
return GymModel(
id: json["id"],
location: json["location"],
gym: json["gym"],
avatar: json["avatar"],
);
}
static List<GymModel> fromJsonList(List list) {
return list.map((item) => GymModel.fromJson(item)).toList();
}
@override
String toString() => gym;
}
pubspec.yaml
name: fitsupp_coach
description: A new Flutter project.
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev
# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1
environment:
sdk: ">=2.12.0 <3.0.0"
# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
flutter_localizations:
sdk: flutter
flutter:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.2
pinput: ^1.2.2
intl: ^0.17.0
quiver: ^3.0.1+1
firebase_auth: ^3.3.5
firebase_core: ^1.11.0
dropdown_search: ^2.0.1
dio: ^4.0.4
provider: ^6.0.2
percent_indicator: ^4.0.0
dev_dependencies:
flutter_test:
sdk: flutter
# The "flutter_lints" package below contains a set of recommended lints to
# encourage good coding practices. The lint set provided by the package is
# activated in the `analysis_options.yaml` file located at the root of your
# package. See that file for information about deactivating specific lint
# rules and activating additional ones.
flutter_lints: ^1.0.0
# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
# To add assets to your application, add an assets section, like this:
assets:
- assets/images/
- assets/images/DropDown/
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.dev/assets-and-images/#resolution-aware.
# For details regarding adding assets from package dependencies, see
# https://flutter.dev/assets-and-images/#from-packages
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
fonts:
- family: SF Pro Display
fonts:
- asset: fontsassets/SFProDisplay/SFProDisplay-Light.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Medium.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Black.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Bold.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Heavy.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Regular.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Semibold.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Thin.ttf
- asset: fontsassets/SFProDisplay/SFProDisplay-Ultralight.ttf
style: normal
- family: SF Pro Text
fonts:
- asset: fontsassets/SFProText/SF-Pro-Text-Light.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Medium.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Black.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Bold.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Heavy.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Regular.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Semibold.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Thin.otf
- asset: fontsassets/SFProText/SF-Pro-Text-Ultralight.otf
style: normal
#
# For details regarding fonts from package dependencies,
# see https://flutter.dev/custom-fonts/#from-packages
flutter_intl:
enabled: true
Solution
OK, this may not be the most elegant solution, but it does the trick.
First create a Model for the button:
class BottomButton {
final String? text;
BottomButton({
this.text,
});
}
Then you are going to want to change all the output types from GymModel? to dynamic:
Widget _customDropDownExample(BuildContext context, dynamic item)
Widget _customPopupItemBuilderExample(
BuildContext context, dynamic item, bool isSelected)
DropdownSearch<dynamic>
Future<List<dynamic>> getData(filter)
Now, in the _customDropDownExample function where you are checking if the item == null add another to see if item is !GymModel:
if (item == null || item is !GymModel) {
return const Text(
"Выберите фитнесс центр",
style: TextStyle(fontSize: 15, color: Color.fromRGBO(33, 33, 33, 0.6)),
);
}
Inside _customPopupItemBuilderExample function check to see if the item is GymModel if so then do exactly what you were doing before and if not then create a button widget of your choice, I used an ElevatedButton for simplicity:
if (item is GymModel) {
return Container(
decoration: !isSelected
? null
: BoxDecoration(
borderRadius: BorderRadius.circular(5),
color: Colors.white,
),
child: ListTile(
selected: isSelected,
title: Text(item.gym),
subtitle: Text(item.location),
leading: (item.avatar == "")
? const CircleAvatar(
radius: 25,
backgroundColor: Colors.white,
backgroundImage: NetworkImage("https://picsum.photos/200"),
)
: CircleAvatar(
radius: 25,
backgroundImage: NetworkImage(item.avatar ?? ''),
)),
);
} else {
return ElevatedButton(onPressed: () {}, child: Text(item.text));
}
Also write an another function to filter the result and assign it to filterFn attribute in DropDownSearch widget:
bool _filterItems(dynamic item, String? str) {
if (item is GymModel) {
return (item.gym.toLowerCase().contains(str!.toLowerCase()) ||
item.location.toLowerCase().contains(str.toLowerCase()));
}
return (item is BottomButton);
}
Finally inside getData function where you check if the data != null add your button model (BottomButton, in my case) to the list:
Future<List<dynamic>> getData(filter) async {
var response = await Dio().get(
"https://my-json-server.typicode.com/dimapichuev2000/JSON_TEST/posts",
queryParameters: {"filter": filter},
);
final data = response.data;
if (data != null) {
List<dynamic> res = GymModel.fromJsonList(data);
BottomButton button = BottomButton(text: "Good Luck!");
return [...res, button];
}
return [];
}
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