Flutter Web: MaterialApp Title changes every time I pop back - flutter

Im building a personal website and everytime I pop back from Projects or Blog Page to my home page the Material App changes from the title i initially put it to the name of the folder carpet of the project. I still don't understand why this happens, so any help would be greatly appreciated.
Note: I'm using the Fluro package for my navigation route.
Image representation of how the MaterialApp Title changes
Blog Page =>Home Page
blog_page.dart
import 'package:flutter/material.dart';
class BlogPage extends StatefulWidget {
#override
_BlogPageState createState() => _BlogPageState();
}
class _BlogPageState extends State<BlogPage> {
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Theme.of(context).backgroundColor,
body: WillPopScope(
onWillPop: () async => true,
child: Center(
child: FractionallySizedBox(
widthFactor: 0.8,
child: FittedBox(
fit: BoxFit.fill,
child: Center(
child: Text(
'Hello Stranger!',
style: Theme.of(context).textTheme.headline1,
),
),
),
),
),
),
);
}
}
main.dart
import 'package:flutter/material.dart';
import 'package:webapp/router.dart';
void main() {
FluroRouter.setupRouter();
runApp(
MyApp(),
);
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Personal Website',
initialRoute: 'home',
onGenerateRoute: FluroRouter.router.generator,
);
}
}
home_page.dart
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart' show timeDilation;
import 'package:webapp/widgets/social_media.dart';
import 'package:webapp/widgets/wave_body.dart';
import 'package:webapp/widgets/custom_button_border.dart';
class HomePage extends StatefulWidget {
#override
_HomePageState createState() => _HomePageState();
HomePage() {
timeDilation = 1.0;
}
}
class _HomePageState extends State<HomePage> {
#override
Widget build(BuildContext context) {
Size size = new Size(
MediaQuery.of(context).size.width,
MediaQuery.of(context).size.height,
);
return DesktopLayout();
}
}
class DesktopLayout extends StatelessWidget {
const DesktopLayout({
Key key,
#required this.size,
}) : super(key: key);
final Size size;
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Color.fromRGBO(47, 66, 83, 1.0),
body: Column(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Flexible(
flex: 3,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Flexible(
flex: 1,
child: Container(),
),
Flexible(
flex: 1,
child: ProfessionalSocialMedia(),
),
Flexible(
flex: 1,
child: Container(),
),
Flexible(
flex: 1,
child: PersonalSocialMedia(),
),
Flexible(
flex: 1,
child: Container(),
),
],
),
),
SizedBox(
height: 15.0,
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
CustomButtonBorder(
stringText: 'Projects',
size: size,
onPressed: () {
Navigator.pushNamed(context, 'project');
},
),
SizedBox(
width: 50.0,
),
CustomButtonBorder(
stringText: 'Blog',
size: size,
onPressed: () {
Navigator.pushNamed(context, 'blog');
},
)
],
),
Stack(
children: [
WaveBody(
size: size,
xOffset: 0,
yOffset: 0,
color: Color.fromRGBO(21, 160, 132, 1.0),
),
],
),
],
),
);
}
}

The Fluro package could be easily be using the Title Widget which changes the Tab name.
That Widget takes a "title (String)" and a "color (Color)" and will update the name over the Tab.
If you're only using Flutter Web you can take advantage of the http class and also replace your url to match your title:
#override
void initState() {
super.initState();
window.history.pushState(null, 'Blog Page', 'blog-page');
}
That will update your URL to "https://my-url.com/blog-page" and adding the Title Widget your tab will say "Blog Page" as well.
#override
Widget build(BuildContext context) {
return Material(
child: Title(
title: 'Blog Page',
color: Colors.white,
child: Container(),
),
);
}
If by any reason you also need Mobile, change your: import 'dart:html'; for the library "universal_html": https://pub.dev/packages/universal_html

Related

Change the color of a container based on the position of a SingleChildScrollView in Flutter

I have an app that shows its content in a SingleChildScrollView. There is Container with a transparent color that I'd like to change the color of to red when the SingleChildScrollView is scrolled to any other position than the start position and then change the color back to transparent when the SingleChildScrollView is scrolled back to its starting position. Code:
class App extends StatefulWidget {
const App({Key? key}) : super(key: key);
#override
State<App> createState() => _AppState();
}
class _AppState extends State<App> {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
Column(
children: [
Flexible(
child: ScrollConfiguration(
behavior: RemoveScrollGlow(),
child: SingleChildScrollView(
child: Column(
children: [
Stack(...) //This is the top section of the page
],
),
),
),
),
],
),
Container(
color: Colors.transparent, //This is the Color I want to change based on the position of the SingleChildScrollView
height: 120,
child: Column(...)
),
],
),
backgroundColor: Colors.white,
);
}
}
EDIT: I managed to make it work by wrapping the SingleChildScrollView in a NotificationListener and updating the color based on the notification like this:
class _AppState extends State<App> {
Color bannercolor = Colors.transparent;
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
Column(
children: [
Flexible(
child: ScrollConfiguration(
behavior: RemoveScrollGlow(),
child: NotificationListener<ScrollUpdateNotification>(
onNotification: (scrollEnd) {
final metrics = scrollEnd.metrics;
if (metrics.pixels != 0) {
setState(() {
bannercolor = Colors.white;
});
} else {
setState(() {
bannercolor = Colors.transparent;
});
}
return true;
},
child: SingleChildScrollView(
child: Column(
children: [
Column(...),
],
),
),
),
),
),
],
),
Container(
color: bannercolor,
height: 120,
child: Column(...),
),
],
),
backgroundColor: Colors.white,
);
}
}
You can try listening to the scroll controller offset like this
class App extends StatefulWidget {
const App({Key? key}) : super(key: key);
#override
State<App> createState() => _AppState();
}
class _AppState extends State<App> {
final ScrollController _scrollController = ScrollController ();
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
Column(
children: [
Flexible(
child: ScrollConfiguration(
behavior: RemoveScrollGlow(),
child: SingleChildScrollView(
controller: _scrollController, //add controller here
child: Column(
children: [
Stack(...) //This is the top section of the page
],
),
),
),
),
],
),
AnimatedBuilder(
        animation: _scrollController,
        builder: (context, _content) {
          return  Container (
(_scrollController.offset>20)? Colors.blue: Colors.transparent,
height: 120,
child: Column(...)
);
}
),
],
),
backgroundColor: Colors.white,
);
}
}

Flutter scrollable layout with dynamic child

I want to create a generic Layout which accepts a child Widget as a parameter, that lays out the content as follows:
I have an AppBar at the Top, a Title (headline), and below that the Content (could be anything). At the bottom, I have a Column with a few buttons. If the content is too big for the screen, all those widgets, except the AppBar, are scrollable. If the content fits the screen, the title and content should be aligned at the top, and the buttons at the bottom.
To showcase what I mean, I created a drawing:
It is easy to create to scrollable content functionality. But I struggle with laying out the content so that the buttons are aligned at the bottom, if the content does NOT need to be scrollable.
It is important to say that I don't know the height of the content widget or the buttons. They are dynamic and can change their height. Also, the title is optional and can have two different sizes.
What I tried is the following:
import 'package:flutter/material.dart';
class BaseScreen extends StatelessWidget {
final String? title;
final bool bigHeader;
final Widget child;
final Widget bottomButtons;
const BaseScreen({
Key? key,
required this.child,
required this.bottomButtons,
this.bigHeader = true,
this.title,
}) : super(key: key);
#override
Widget build(BuildContext context) {
final AppBar appBar = AppBar(
title: Text("AppBar"),
);
double minChildHeight = MediaQuery.of(context).size.height -
MediaQuery.of(context).viewInsets.bottom -
MediaQuery.of(context).viewInsets.top -
MediaQuery.of(context).viewPadding.bottom -
MediaQuery.of(context).viewPadding.top -
appBar.preferredSize.height;
if (title != null) {
minChildHeight -= 20;
if (bigHeader) {
minChildHeight -= bigHeaderStyle.fontSize!;
} else {
minChildHeight -= smallHeaderStyle.fontSize!;
}
}
final Widget content = Column(
mainAxisSize: MainAxisSize.min,
children: [
if (title != null)
Text(
title!,
style: bigHeader ? bigHeaderStyle : smallHeaderStyle,
textAlign: TextAlign.center,
),
if (title != null)
const SizedBox(
height: 20,
),
ConstrainedBox(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
child,
bottomButtons,
],
),
constraints: BoxConstraints(
minHeight: minChildHeight,
),
),
],
);
return Scaffold(
appBar: appBar,
body: SingleChildScrollView(
child: content,
),
);
}
TextStyle get bigHeaderStyle {
return TextStyle(fontSize: 20);
}
TextStyle get smallHeaderStyle {
return TextStyle(fontSize: 16);
}
}
The scrolling effects work perfectly, but the Buttons are not aligned at the bottom. Instead, they are aligned directly below the content. Does anyone know how I can fix this?
DartPad you can check here
customscrollview tutorial
Scaffold(
// bottomNavigationBar: ,
appBar: AppBar(
title: Text(" App Bar title ${widgets.length}"),
),
//============
body: CustomScrollView(
slivers: [
SliverFillRemaining(
hasScrollBody: false,
child: Column(
// controller: _mycontroller,
children: [
title,
...contents,
// ---------------------This give Expansion and button get down --------
Expanded(
child: Container(),
),
// ---------------------This give Expansion and button get down --------
Buttons
],
),
)
],
))
We can Achieve with the help of CustomScrollView widget and Expanded widget.here Expanded widget just expand between the widget
Sample Code
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
runApp(
MaterialApp(debugShowCheckedModeBanner: false, home: MyApp()),
);
}
class MyApp extends StatefulWidget {
#override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
var widgets = [];
var _mycontroller = ScrollController();
#override
Widget build(BuildContext context) {
var title = Center(
child: Text(
"Scrollable title ${widgets.length}",
style: TextStyle(fontSize: 30),
));
var contents = [
...widgets,
];
var Buttons = Row(
children: [
Expanded(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 100,
child: ElevatedButton(
onPressed: () {
setState(() {
widgets.add(Container(
height: 100,
child: ListTile(
title: Text(widgets.length.toString()),
subtitle: Text("Contents BTN1"),
),
));
});
// _mycontroller.jumpTo(widgets.length * 100);
},
child: Text("BTN1"),
),
),
)),
Expanded(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
height: 100,
child: ElevatedButton(
onPressed: () {
setState(() {
if (widgets.length > 0) {
widgets.removeLast();
}
});
// _mycontroller.jumpTo(widgets.length * 100);
},
child: Text("BTN2"),
),
),
))
],
);
return MaterialApp(
debugShowCheckedModeBanner: false,
home: SafeArea(
child: Scaffold(
// bottomNavigationBar: ,
appBar: AppBar(
title: Text(" App Bar title ${widgets.length}"),
),
body: CustomScrollView(
slivers: [
SliverFillRemaining(
hasScrollBody: false,
child: Column(
// controller: _mycontroller,
children: [
title,
...contents,
Expanded(
child: Container(),
),
Buttons
],
),
)
],
)),
),
);
}
}
Try this:
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp();
#override
Widget build(BuildContext context) {
return MaterialApp(
home: BaseScreen(
bottomButtons: [
ElevatedButton(onPressed: () {}, child: const Text('Button 1')),
ElevatedButton(onPressed: () {}, child: const Text('Button 2')),
],
content: Container(
color: Colors.lightGreen,
height: 200,
),
title: 'Title',
),
);
}
}
class BaseScreen extends StatelessWidget {
final bool bigHeader;
final List<Widget> bottomButtons;
final String? title;
final Widget content;
const BaseScreen({
this.bigHeader = true,
required this.bottomButtons,
required this.content,
this.title,
});
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: CustomScrollView(
slivers: [
SliverFillRemaining(
hasScrollBody: false,
child: Column(
children: [
if (title != null)
Padding(
padding: const EdgeInsets.symmetric(vertical: 12),
child: Text(
title!,
style: bigHeader ? _bigHeaderStyle : _smallHeaderStyle,
textAlign: TextAlign.center,
),
),
content,
const Spacer(),
...bottomButtons,
],
),
),
],
),
);
}
TextStyle get _bigHeaderStyle => const TextStyle(fontSize: 20);
TextStyle get _smallHeaderStyle => const TextStyle(fontSize: 16);
}
Screenshots:
without_scrolling
scrolled_up
scrolled_down

How to make Column scrollable when overflowed but use expanded otherwise

I am trying to achieve an effect where there is expandable content on the top end of a sidebar, and other links on the bottom of the sidebar. When the content on the top expands to the point it needs to scroll, the bottom links should scroll in the same view.
Here is an example of what I am trying to do, except that it does not scroll. If I wrap a scrollable view around the column, that won't work with the spacer or expanded that is needed to keep the bottom links on bottom:
import 'package:flutter/material.dart';
const Color darkBlue = Color.fromARGB(255, 18, 32, 47);
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(
scaffoldBackgroundColor: darkBlue,
),
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Center(
child: MyWidget(),
),
),
);
}
}
class MyWidget extends StatefulWidget {
#override
State<MyWidget> createState() {
return MyWidgetState();
}
}
class MyWidgetState extends State<MyWidget> {
List<int> items = [1];
#override
Widget build(BuildContext context) {
return Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
IconButton(
icon: const Icon(Icons.add),
onPressed: () {
setState(() {
items.add(items.last + 1);
});
},
),
IconButton(
icon: const Icon(Icons.delete),
onPressed: () {
setState(() {
if (items.length != 1) items.removeLast();
});
},
),
],
),
for (final item in items)
MyAnimatedWidget(
child: SizedBox(
height: 200,
child: Center(
child: Text('Top content item $item'),
),
),
),
Spacer(),
Container(
alignment: Alignment.center,
decoration: BoxDecoration(border: Border.all()),
height: 200,
child: Text('Bottom content'),
)
],
);
}
}
class MyAnimatedWidget extends StatefulWidget {
final Widget? child;
const MyAnimatedWidget({this.child, Key? key}) : super(key: key);
#override
State<MyAnimatedWidget> createState() {
return MyAnimatedWidgetState();
}
}
class MyAnimatedWidgetState extends State<MyAnimatedWidget>
with SingleTickerProviderStateMixin {
late AnimationController controller;
#override
initState() {
controller = AnimationController(
value: 0, duration: const Duration(seconds: 1), vsync: this);
controller.animateTo(1, curve: Curves.linear);
super.initState();
}
#override
Widget build(BuildContext context) {
return AnimatedBuilder(
animation: controller,
builder: (context, child) {
return SizedBox(height: 200 * controller.value, child: widget.child);
});
}
}
I have tried using a global key to get the size of the spacer and detect after rebuilds whether the spacer has been sized to 0, and if so, re-build the entire widget as a list view (without the spacer) instead of a column. You also need to listen in that case for if the size shrinks and it needs to become a column again, it seemed to make the performance noticeably worse, it was tricky to save the state when switching between column/listview, and it seemed not the best way to solve the problem.
Any ideas?
Try implementing this solution I've just created without the animation you have. Is a scrollable area at the top and a persistent footer.
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(
scaffoldBackgroundColor: darkBlue,
),
home: SafeArea(
child: Scaffold(
appBar: AppBar(
title: Text("My AppBar"),
),
body: Column(
children: [
Expanded(
child: SingleChildScrollView(
child: Column(
children: [
// Your scrollable widgets here
Container(
height: 100,
color: Colors.green,
),
Container(
height: 100,
color: Colors.blue,
),
Container(
height: 100,
color: Colors.red,
),
],
),
),
),
Container(
child: Text(
'Your footer',
),
color: Colors.blueGrey,
height: 200,
width: double.infinity,
)
],
),
),
),
);
}
}

Flutter ListView/ListTiles are not rendering on the page

I am new to Flutter/Dart but I am trying to incorporate a ListView into a project that I am working on but I cannot get it to work. I have tried it at least 12 different ways and it is still not working. I know the issue has something to do with the way I am sizing (or not sizing) the ListView/ListTiles. I have tried adding heights to SizedBoxes, heights to Containers, widths to columns, Expanded, Flexible etc. Nothing has worked. I am not posting the error messages because with all of the solutions I have tried they have all essentially been related to either the height or width of the ListView/ListTile exceeding the limitations of the screen. Below are the latest code snippet I have tried. I know there are several topics on SO that have addressed this but I have not been able to get any of them to work. My ListView should only contain 3 tiles so perhaps a ListView.Builder would be better. I am open to any suggestions or advice. Thanks in advance for the help!
class _HotelFormState extends State<HotelForm> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Hotel Form'),
),
body: Column(
children: <Widget>[
SizedBox(height: 20.0),
Row(
children: <Widget>[
TripDates(),
],
),
SizedBox(height: 20.0),
Column(
children: <Widget>[
RoomCounts(),
],
),
],
),
);
}
}
RoomCounts Class
class RoomCounts extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
body: Container(
height: 100.0,
child: new ListView(
children: new List.generate(3, (i) => new ListTileItem(title: "$i",)),
),
),
);
}
}
ListTile Class
class _ListTileItemState extends State<ListTileItem> {
//Some lists are here
#override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
Flexible(
child: ListTile(
leading: Icon(widget.icons),
title: new Text(widget.title),
trailing: new Row(
children: <Widget>[
_itemCount != 0
? new IconButton(icon: new Icon(Icons.remove), onPressed: () => setState(() => _itemCount--),)
: new Container(),
new Text(_itemCount.toString()),
new IconButton(icon: new Icon(Icons.add), onPressed: () => setState(() => _itemCount++))
],
),
),
),
],
);
}
}
You can copy paste run full code below
You do not need Scaffold in RoomCounts
You do not need Column in _ListTileItemState
You need SizedBox in trailing of ListTile
working demo
full code
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: HotelForm(),
);
}
}
class HotelForm extends StatefulWidget {
#override
_HotelFormState createState() => _HotelFormState();
}
class _HotelFormState extends State<HotelForm> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Hotel Form'),
),
body: Column(
children: <Widget>[
SizedBox(height: 20.0),
/*Row(
children: <Widget>[
TripDates(),
],
),*/
SizedBox(height: 20.0),
Column(
children: <Widget>[
RoomCounts(),
],
),
],
),
);
}
}
class RoomCounts extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
height: 100.0,
child: ListView(
children: List.generate(
3,
(i) => ListTileItem(
title: "$i",
)),
),
);
}
}
class ListTileItem extends StatefulWidget {
final String title;
final IconData icons;
ListTileItem({this.title, this.icons});
#override
_ListTileItemState createState() => _ListTileItemState();
}
class _ListTileItemState extends State<ListTileItem> {
int _itemCount = 0;
#override
Widget build(BuildContext context) {
return ListTile(
leading: Icon(widget.icons),
title: Text(widget.title),
trailing: SizedBox(
width: 200,
child: Row(
children: <Widget>[
_itemCount != 0
? IconButton(
icon: Icon(Icons.remove),
onPressed: () => setState(() => _itemCount--),
)
: Container(),
Text(_itemCount.toString()),
IconButton(
icon: Icon(Icons.add),
onPressed: () => setState(() => _itemCount++))
],
),
),
);
}
}

Text and Image together in a Flutter Card

I want to add an image and a text together in a card but I'm not able to do it. I think a row would be used here but not able to implement it. I'm new to flutter and app development so having some troubles. Any help is really appreciated. Also the cards are in GridView(not in ListView).
import 'package:flutter/material.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';
import 'lists.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Just Another App',
home: Home(),
routes: {
"/webview": (_) => WebviewScaffold(
withJavascript: true,
withLocalStorage: true,
url: 'https://www.google.com/',
appBar: AppBar(
title: Text('Browser'),
),
),
},
theme: ThemeData(primaryColor: Colors.black),
);
}
}
class Home extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
final webView = FlutterWebviewPlugin();
#override
void initState() {
super.initState();
webView.close();
}
#override
Widget build(BuildContext context) {
var gridView = GridView.builder(
itemCount: 15,
gridDelegate:
SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
itemBuilder: (BuildContext context, int index) {
return InkWell(
child: Card(
elevation: 10,
child: Padding(
padding: const EdgeInsets.all(35),
child: Container(
// child: SizedBox(child: Text('yashjha'),),
// child: Image.asset('lib/images/${images[index]}'),
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('lib/images/${images[index]}'),
fit: BoxFit.fitWidth,
alignment: Alignment.topCenter,
),
),
),
),
),
onTap: () {
setState(() {
Navigator.of(context).pushNamed('/webview');
});
},
);
});
return Scaffold(
appBar: AppBar(
title: Text('Just Another App'),
),
body: Container(
child: gridView,
padding: EdgeInsets.all(12),
),
);
}
[GridViewApp Screenshot][1]}
This is a variable which I'm using in the "body" of Scaffold.
If you want to place an Image and a text side by side, add a Row widget:
child: Row(
children: <Widget>[
DecorationImage(...),
Text(...),
],
)
You can also set mainAxisAlignment and crossAxisAlignment to make sure that your widgets are placed correctly
just wrap your Container into a Row Widget and add a text to it.
Row(
children: <Widget>[
Text("add text here"),
Container(
// child: SizedBox(child: Text('yashjha'),),
// child: Image.asset('lib/images/${images[index]}'),
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('lib/images/${images[index]}'),
fit: BoxFit.fitWidth,
alignment: Alignment.topCenter,
),
),
),
],
),