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I am trying to display a list using a list title but would like to add a text with a click event to the top of the list.
How could I do it?
I would be very grateful for the help.
I am trying to display a list using a list title but would like to add a text with a click event to the top of the list.
How could I do it?
I would be very grateful for the help.
Code and image::
Widget StatefulBuilderSuggestions(BuildContext context ,List <SearchDelegateModel> historialMenuPrincipal){
return Container(
child:StatefulBuilder(
builder:(context,setState)
{
return Container(
child: ListView.builder(
itemCount: historialMenuPrincipal.length,
itemBuilder: (context,i)
{
contentPadding: EdgeInsets.symmetric(vertical: 12,horizontal: 16);
return
ListTile(
subtitle: Text(historialMenuPrincipal[i] == null ? "no data" :historialMenuPrincipal[i].email,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 20,
fontWeight: FontWeight.bold,
),
),
title: Text(historialMenuPrincipal[i] == null ? "no data" :historialMenuPrincipal[i].contrasena,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 20,
fontWeight: FontWeight.bold,
),
),
trailing: historialMenuPrincipal[i] != null || historialMenuPrincipal.isEmpty
? IconButton(
icon: Icon(Icons.cancel,color: Colors.black,),
onPressed: () {
setState(() {
historialMenuPrincipal.remove(historialMenuPrincipal[i]);
});
},): null
);
}
),
);
}
)
);
}
use a column with 2 parts, title as a textbutton and above the list
Container(
child: Column(
children: [
TextButton(
onPressed: () {
hideList = !hideList;
},
child: Text("Title"),
),
hideList ? ListView() : Container(),
],
))
something like this
In order to add a Text widget above a list, both widgets should be inside a column and important thing to note is that ListView widget must be inside a Expanded widget and for the text widget to be clickable, use GestureDetector.
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Container(
padding: const EdgeInsets.all(16),
child: Column(
children: [
GestureDetector(
onTap: () {}, child: const Text("Some text above the list")),
Expanded(
child: ListView.builder(
itemCount: 50,
itemBuilder: (context, i) {
return Container(
margin: const EdgeInsets.all(16),
color: Colors.pinkAccent,
child: Text("$i"));
},
),
),
],
),
),
);
}
I am having difficulty nesting a horizontal list view within a nested scroll view. What I really want is a group of horizontal lists one below the other within a vertical list view sort of container.
Below is part of my flutter code which returns the error:
Vertical viewport was given unbounded height
Widget build(BuildContext context) {
return Scaffold(
body:NestedScrollView(
floatHeaderSlivers: true,
headerSliverBuilder:(context,innerBoxIsScrolled)=>[
const SliverAppBar(
systemOverlayStyle: SystemUiOverlayStyle(statusBarIconBrightness: Brightness.light,statusBarBrightness: Brightness.dark,),
floating: true,snap: true,
title: Padding(padding: EdgeInsets.all(8.0),child: Text("Swahili Times", style: TextStyle(color:Color(0xffbf0000), fontFamily: "old-english",fontSize: 20),),),
centerTitle: true,backgroundColor: Colors.white,elevation: 4.0,
),
],
body: SingleChildScrollView(
child: Column(
children: [
ListView.separated(
scrollDirection: Axis.vertical,
padding: const EdgeInsets.all(6.0),
itemBuilder: (context,item)=> buildCard(item+1),
separatorBuilder: (context,item)=> const SizedBox(height: 12,),
itemCount: 9
)
],
),
),
)
);
}
}
the list view need to be in SizedBox or in Expanded Widgets to set it's height and it will be work successfully with no errors
SizedBox(
height: 200,
child : ListView.separated(
scrollDirection: Axis.vertical,
padding: const EdgeInsets.all(6.0),
itemBuilder: (context,item)=> buildCard(item+1),
separatorBuilder: (context,item)=> const SizedBox(height: 12,),
itemCount: 9
),)
or you can use Expanded
Expanded(
child : ListView.separated(
scrollDirection: Axis.vertical,
padding: const EdgeInsets.all(6.0),
itemBuilder: (context,item)=> buildCard(item+1),
separatorBuilder: (context,item)=> const SizedBox(height: 12,),
itemCount: 9
),)
I don't have much experience with flutter.
I would like to use the language_tool library for Dart and Flutter.
I created the script below:
void main() => runApp(mainApp());
class mainApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Chat(),
);
}
}
class Chat extends StatefulWidget {
const Chat({Key? key}) : super(key: key);
#override
_ChatState createState() => _ChatState();
}
class _ChatState extends State<Chat> {
String text = 'Henlo i am Gabriele';
Future<List<WritingMistake>> tool(String text) async {
var tool = LanguageTool();
var result = tool.check(text);
var correction = await result;
print(correction);
List<WritingMistake> mistakes = [];
for (var m in correction) {
//var mistake = m.issueDescription;
WritingMistake mistake = WritingMistake(
message: m.message,
offset: m.offset,
length: m.length,
issueType: m.issueType,
issueDescription: m.issueDescription,
replacements: m.replacements,
);
mistakes.add(mistake);
}
print(mistakes.length);
print(mistakes);
return mistakes;
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
color: Colors.red,
height: 150.0,
width: double.infinity,
child:
Center(child: Text(text, style: TextStyle(fontSize: 20.0))),
),
Text(
'\n Tap on the blue button to replace it in the message.\n',
),
FutureBuilder(
future: tool(text),
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.data == null) {
return Container(
child: Center(
child: Text('Loading...'),
),
);
} else {
return SizedBox(
height: 200.0,
child: ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
return Container(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
children: [
Row(
children: [
Row(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(' ' +
(index + 1).toString() +
' '),
Container(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text(text.substring(
snapshot.data[index].offset,
snapshot.data[index].offset +
snapshot
.data[index].length)),
),
color: Colors.blue,
),
],
),
Icon(
Icons.arrow_forward,
),
Text(snapshot.data[index].issueDescription)
],
),
// Todo: Row with List of .replacements
],
),
),
// snapshot.data[index].issueDescription),
);
},
),
);
}
},
),
Expanded(child: Container(color: Colors.grey))
],
),
),
);
}
}
And it currently looks like this:
And I would like it to become like in this screen, but I would like the green containers derive from the WritingMistake.replacements list (with each element of the list as text):
Do you know how I can do it?
Spent several hours doing exactly what you wanted. My Code:
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:language_tool/language_tool.dart';
void main() => runApp(mainApp());
class mainApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return const MaterialApp(
home: Chat(),
);
}
}
class Chat extends StatefulWidget {
const Chat({Key? key}) : super(key: key);
#override
_ChatState createState() => _ChatState();
}
class _ChatState extends State<Chat> {
String text = 'Henlo i am Gabriele';
static List<WritingMistake> mistakes = []; // Moved Here And Init Like Static
Future<List<WritingMistake>> tool(String text) async {
var tool = LanguageTool();
var result = tool.check(text);
var correction = await result;
print(correction);
for (var m in correction) {
//var mistake = m.issueDescription;
WritingMistake mistake = WritingMistake(
message: m.message,
offset: m.offset,
length: m.length,
issueType: m.issueType,
issueDescription: m.issueDescription,
replacements: m.replacements,
);
mistakes.add(mistake);
}
print(mistakes.length);
print(mistakes);
return mistakes;
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
color: Colors.red,
height: 150.0,
width: double.infinity,
child: Center(
child: Text(text, style: const TextStyle(fontSize: 20.0))),
),
const Text(
'\n Tap on the blue button to replace it in the message.\n',
),
FutureBuilder(
future: tool(text),
builder: (BuildContext context, AsyncSnapshot snapshot) {
if (snapshot.data == null) {
return const Center(
child: Text('Loading...'),
);
} else {
return SizedBox(
height: 200.0,
child: ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int mistakeIdIndex) {
return Container(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
children: [
Row(
children: [
Row(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(' ' +
(mistakeIdIndex + 1).toString() +
' '),
Container(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text(text.substring(
snapshot.data[mistakeIdIndex]
.offset,
snapshot.data[mistakeIdIndex]
.offset +
snapshot
.data[mistakeIdIndex]
.length)),
),
color: Colors.blue,
),
],
),
const Icon(
Icons.arrow_forward,
),
Text(snapshot
.data[mistakeIdIndex].issueDescription)
],
),
// Todo: Row with List of .replacements
SizedBox(
width: MediaQuery.of(context)
.size
.width, // Width = Screen Width
height: 44,
child: ListView.builder(
itemCount: mistakes.length,
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemBuilder: (BuildContext context,
int replacementsListIndex) {
return buildReplacements(mistakeIdIndex,
replacementsListIndex);
}),
)
],
),
),
// snapshot.data[index].issueDescription),
);
},
),
);
}
},
),
Expanded(child: Container(color: Colors.grey))
],
),
),
);
}
Widget buildReplacements(int mistakeIdIndex, int replacementsListIndex) {
if (mistakes[replacementsListIndex].replacements!.length == null) {
return const SizedBox(); // Return Empty If No Replacements Found, Just To Be Safe
}
// Check For Mistake ID - Remove This Will Cause A Problem with Displaying All Replacements Under All Words
if (mistakeIdIndex == replacementsListIndex) {
// If Only 1 Replacement, No Need To Create ListView.builder
if (mistakes[replacementsListIndex].replacements!.length == 1) {
return Container(
margin: const EdgeInsets.all(4),
padding: const EdgeInsets.all(8),
decoration: const BoxDecoration(
color: Color.fromARGB(255, 174, 213, 130)), // Green Color
child: Text(
mistakes[replacementsListIndex].replacements!.toString(),
style: const TextStyle(),
textAlign: TextAlign.center,
),
);
}
// Create ListView.builder to Create A Split Between Replacements To One Wrong-Word (Every Replacement Has It's Own Container With Green Background)
else {
return ListView.builder(
itemCount: mistakes[replacementsListIndex].replacements!.length,
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemBuilder: (context, index) {
return Container(
margin: const EdgeInsets.all(4),
padding: const EdgeInsets.all(8),
decoration: const BoxDecoration(
color: Color.fromARGB(255, 174, 213, 130)), // Green Color
child: Text(
mistakes[replacementsListIndex]
.replacements![index]!
.toString(),
style: const TextStyle(),
textAlign: TextAlign.center,
),
);
});
}
}
// If Replacement Not For This Wrong-Word, Then Skip
else {
return const SizedBox();
}
}
}
And Screenshot:
I am using CarouselSlider in my app and right now it looks like this:
The problem is that I don't want the highlighted/selected widget in the middle but on the right. Like this:
So what I need to do is, moving the whole widget to the right so the right half of the list is out of the view and only the left halt is being displayed. But I have no idea how I can achieve this...
This is my code:
#override
Widget build(BuildContext context) {
return Expanded(
child: Container(
height: 50,
child: CarouselSlider.builder(
itemCount: data.length,
itemBuilder:
(BuildContext context, int itemIndex, int pageViewIndex) =>
_buildListItem(itemIndex),
options: CarouselOptions(
viewportFraction: 0.35,
reverse: true,
enlargeCenterPage: true,
onPageChanged: (index, whatever) {
print(index);
},
enableInfiniteScroll: false,
scrollDirection: Axis.horizontal,
)),
),
);
}
Widget _buildListItem(int index) {
return Container(
color: AppColors.red,
height: 50,
width: 100,
child: Center(
child: Padding(
padding: EdgeInsets.only(top: 8.scaled),
child: Text(
data[index].toString(),
style: AppTextStyles.glossAndBloomH2Regular,
),
),
),
);
}
And this is where I call it:
Positioned(
right: sidePadding,
bottom: 30,
left: sidePadding,
child: Row(
mainAxisAlignment: MainAxisAlignment.end,
children: [
IconButtonWithExpandedTouchTarget(
onTapped: () {
showModalBottomSheet(
context: context,
backgroundColor: AppColors.transparent,
builder: (BuildContext context) {
return ModalBottomSheetView();
},
);
},
svgPath: 'assets/icons/menue.svg',
),
YearSlider(),
],
),
Every help is appreciated! Let me know if you need anything more
I have a class ViewTotalItemProvider which extends the ChangeNotifier. Inside the class, there is a list like this.
class ViewTotalItemProvider extends ChangeNotifier{
List<CartPlantLists> cartPlantList3 = [];
}
Additionally, there are 3 screens including class like, PlantFeatureScreen1, ParticularPlant2, CartDetais3. All are stateful widget and I am adding some items in second screen i.e. ParticularPlant2 class.
When I try to show the items from list in the second screen and the third screen it works.
But the value is not updated in the firstScreen i.e. PlantFeatureScreen1. However, when I reload the app, it shows the updated value.
why is this happening? How can I solve it?
Code
ViewTotalItemProvider
List<CartPlantLists> cartPlantList3 = [];
class ViewTotalItemProvider extends ChangeNotifier{
addQuantity(index){
cartPlantList3[index].qu++;
notifyListeners();
}
subtrachQuantity(index){
cartPlantList3[index].qu--;
notifyListeners();
}
}
firstScreen PlantFeatureScreen1 (Here I want to update the value in the very last widget)
class PlantFeatureScreen1 extends StatefulWidget {
#override
_PlantFeatureScreen1State createState() => _PlantFeatureScreen1State();
}
class _PlantFeatureScreen1State extends State<PlantFeatureScreen1> {
#override
Widget build(BuildContext context) {
return ChangeNotifierProvider<ViewTotalItemProvider>(
create: (context) => ViewTotalItemProvider(),
child:Builder(builder: (context) {
return Column(
children: <Widget>[
TopAppBar(),
Expanded(
flex: 1,
child: Align(
alignment: Alignment(-1, 0),
child: Container(
decoration: BoxDecoration(
color: Colors.white,
),
child: Text(
"Plants",
style: TextStyle(fontSize: 30, fontWeight: FontWeight.w700),
),
),
),
),
Expanded(
flex: 5,
child: Container(
width: double.infinity,
decoration: BoxDecoration(
color: Colors.blue,
),
child: DefaultTabController(
length: 5,
child: Column(
children: [
Container(
height: 50,
width: double.infinity,
child: TabBar(
isScrollable: true,
tabs: ourAllLists.tabMaker(),
),
),
Container(
height: 317,
width: double.infinity,
decoration: BoxDecoration(color: Colors.white),
child: TabBarView(
children: ourAllLists.tabViewerMaker(context),),),
],
),
),
),
),
Padding(
padding: const EdgeInsets.fromLTRB(20, 0, 20, 20),
child: Container(
alignment: Alignment.bottomRight,
height: 120,
width: double.infinity,
child: Stack(
overflow: Overflow.visible,
children: [
Container(
height: 70,
width: 105,
decoration: BoxDecoration(
color: Color(0xFF96CA2D),
borderRadius: BorderRadiusDirectional.horizontal(
end: Radius.circular(32),
start: Radius.circular(32))),
child: Icon(FontAwesomeIcons.shoppingBag,color:Colors.white,size:30),
),
Positioned(
// top: 0,
bottom: 50,
right: 0,
child: Consumer<ViewTotalItemProvider>(
builder: (context, value, child){
return Container(
height: 35,
width: 35,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(50),
border: Border.all(color: Color(0xFF96CA2D),width: 4)
),
child: Center(child: Text(ourAllLists.totalquantity().toString(),style:TextStyle(fontSize: 20,color: Color(0xFF96CA2D)))),
);
}),
),
],
),
),
)
],
);
})
);
}
}
secondScreen ParticularPlant2
class ParticularPlant2 extends StatefulWidget {
final indexNumber;
ParticularPlant2({#required this.indexNumber});
#override
_ParticularPlant2State createState() => _ParticularPlant2State();
}
class _ParticularPlant2State extends State<ParticularPlant2> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: SafeArea(
child: Scaffold(
body: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
TopAppBar(),
Container(
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadiusDirectional.only(
bottomStart: Radius.circular(50),
),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
ourAllLists
.mainListAllPlantDetailsList1[widget.indexNumber].pN,
style: kPlantNameStyle,
),
Text(
ourAllLists
.mainListAllPlantDetailsList1[widget.indexNumber].ca
.toUpperCase(),
style: TextStyle(
fontSize: 15,
),
),
Text(
"\$" +
ourAllLists
.mainListAllPlantDetailsList1[widget.indexNumber]
.pr
.toString(),
style: kItemPrice,
),
SizedBox(height: 100),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
height: 80,
width: 80,
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(50)),
child: Icon(
FontAwesomeIcons.flag,
color: Color(0xFF9DCD3C),
),
),
SizedBox(
height: 50,
),
FlatButton(
onPressed: () {
final tile = cartPlantList3.firstWhere(
(item) =>
item.pN ==
ourAllLists
.mainListAllPlantDetailsList1[
widget.indexNumber]
.pN,
orElse: () => null);
if (tile != null) {
} else {
cartPlantList3.add(
CartPlantLists(
quantity: 1,
plantName: ourAllLists
.mainListAllPlantDetailsList1[
widget.indexNumber]
.pN,
category: ourAllLists
.mainListAllPlantDetailsList1[
widget.indexNumber]
.ca,
price: ourAllLists
.mainListAllPlantDetailsList1[
widget.indexNumber]
.pr,
),
);
}
print(cartPlantList3.length);
},
child: Container(
height: 80,
width: 80,
decoration: BoxDecoration(
color: Color(0xFF9DCD3C),
borderRadius: BorderRadius.circular(50)),
child: Icon(FontAwesomeIcons.shoppingBag,
color: Colors.white),
),
)
],
),
Container(
height: 250,
child: Image(image: AssetImage("assets/tulip.png")),
)
],
)
],
),
)
],
),
),
),
);
}
}
It seems like you are using Provider the wrong way. The best way to do this in your scenario is to wrap MaterialApp inside MyApp() in your main.dart file with MultiProvider. Try something like this: https://pub.dev/packages/provider#multiprovider You can place a ChangeNotifierProvider inside it.
return MultiProvider(
providers: [
ChangeNotifierProvider<ViewTotalItemProvider>(
create: (context) => ViewTotalItemProvider()),
],
child: MaterialApp(...)
);
Also, you have to place a getter and setter in your Model. Here is an example:
class ImageModel extends ChangeNotifier {
String _base64Image;
get base64Image => _base64Image;
set base64Image(String base64Image) {
_base64Image = base64Image;
notifyListeners();
}
}
I would also recommend using Selector instead of Consumer (Ideally, you should use Selector instead of Consumer so that the widget only rebuilds if the value its listening to changes) Here is an example based on the model above:
#override
Widget build(BuildContext context) {
//other widgets
Selector<ImageModel, String>(
selector: (_, model) => model.base64Image,
builder: (_, image, __) {
return Text(image);
},
);
}
)
}
Here is how you can get and set it using a RaisedButton:
class _PlantFeatureScreen1State extends State<PlantFeatureScreen1> {
final itemModel;
List<CartPlantLists> myList=[];
#override
Widget build(BuildContext context) {
itemModel = Provider.of<ViewTotalItemProvider>(context,listen:false);
print(itemModel.yourVariable); //getting the value
return Container(
child: RaisedButton(
child:Text("Set Item");
onPressed:(){
itemModel.yourVariable=myList; //setting the value
},
),
);
}
}
Hope this helps! Good Luck!
Step 1:
add the dependency for the provider pattern in the pubspec.yaml file
dependencies:
flutter:
sdk: flutter
provider: ^4.1.2
Step 2:
create provider in seperate file :
class ViewTotalItemProvider with ChangeNotifier{
List<CartPlantLists> _cartPlantList1 = [];
get cartPlantList1 => _cartPlantList1 ;
set cartPlantList1 (List<CartPlantLists> selected){
_cartPlantList1 = selected;
notifyListeners();
}
}
step 3:
Use MultiProvider to wrap the MaterialApp widget in main.dart.
void main() => runApp(
MultiProvider (providers: [
ChangeNotifierProvider<ViewTotalItemProvider>.value(value:
ViewTotalItemProvider()),
],
child: MyApp()
)
);
class MyApp extends StatelessWidget {
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage(),
);
}
}
Step 4:
use provider in your screen PlantFeatureScreen1 :
class PlantFeatureScreen1 extends StatefulWidget {
#override
_PlantFeatureScreen1State createState() => _PlantFeatureScreen1State();
}
class _PlantFeatureScreen1State extends State<PlantFeatureScreen1> {
var viewTotalItemProvider;
#override
Widget build(BuildContext context) {
viewTotalItemProvider = Provider.of<ViewTotalItemProvider>(context);
return Scaffold(
.......
);
}
}
step 5:
get cartPlantList1.
List<CartPlantLists> list = viewTotalItemProvider.cartPlantList1;
step 6 : set cartPlantList1.
List<CartPlantLists> list = [];
...
viewTotalItemProvider.cartPlantList1 = list;
similarly u can use for other two classes.