import 'package:flutter/material.dart';
import 'package:audioplayers/audioplayers.dart';
void main() => runApp(const CustomXylophoneApp());
class CustomXylophoneApp extends StatelessWidget {
const CustomXylophoneApp({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SafeArea(
child: Column(
children: <Widget>[
TextButton(
onPressed: () {
AudioCache player = AudioCache();
player.play('assets_note1.wav');
TextButton.styleFrom(
backgroundColor: Colors.blue,
foregroundColor: Colors.red);
},
child: Text('Tune1'),
),
You used style in wrong place!
TextButton(
onPressed: () {},
style: TextButton.styleFrom(
backgroundColor: Colors.amber,
),
child: const Text(
'Tune1',
style: TextStyle(color: Colors.black),
),
),
dont use style in void functions like onPressed
You have two option to do that:
ButtonStyle:
TextButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor:
MaterialStateProperty.all(Colors.blue)),
child: Text(
'Tune1',
style: TextStyle(color: Colors.black),
),
),
styleFrom:
TextButton(
onPressed: () {},
style: TextButton.styleFrom(
backgroundColor: Colors.blue,
),
child: Text(
'Tune1',
style: TextStyle(color: Colors.black),
),
),
but I notice that you want to update the background color when play button press, so you can define a variable and when the button pressed change that variable, like this:
Color backgroundColor = Colors.red;
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SafeArea(
child: Column(
children: <Widget>[
TextButton(
onPressed: () {
AudioCache player = AudioCache();
player.play('assets_note1.wav');
setState(() {
backgroundColor = Colors.blue;
});
},
style: TextButton.styleFrom(
backgroundColor: backgroundColor,
),
child: Text('Tune1'),
),
....
}
Related
This time I'm making an app top bar in flutter. I wrote code like this.
import 'package:flutter/material.dart';
class VideoAppBar extends StatelessWidget{
const VideoAppBar({Key? key}) : super(key: key);
#override
Widget build(BuildContext context){
return SafeArea(
child: Scaffold(
body: WillPopScope( // <- wraps only the Scaffold body.
child: Center(
),
onWillPop: () {
return Future(() => false);
},
),
appBar: AppBar(
backgroundColor: Colors.white,
title: Text('Very verse',
style: TextStyle(
color: Colors.black,
fontSize: 20,
),),
centerTitle: true,
leading: IconButton(
onPressed: () {
Navigator.pop(context);
},
color: Colors.black,
iconSize: 25,
icon: Icon(Icons.arrow_back),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.bookmark_outline),
iconSize: 25,
color: Colors.black,
onPressed: () {
print('GD');
}
),
],
),
),
);
}
}
I'd like to put this code simply as a function on several other pages.
AppBar(title:VideoAppBar);
I figured it could be done like this.
But it doesn't go back.
How should I write the code?
Try below Code hope its helpful to you
Create your regular class or your Widget like below:
import 'package:flutter/material.dart';
void main() {
runApp(
MyApp(),
);
}
class MyApp extends StatelessWidget {
bool shouldPop = true;
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: WillPopScope(
onWillPop: () async {
return shouldPop;
},
child: Scaffold(
appBar: appBar(context),
body: Center(
child: Text('Test'),
),
),
),
);
}
}
Create another dart file like appBar.dart and declare your Appbar Widget in dart file. call your widget any file on your need
appBar(BuildContext context) {
return AppBar(
backgroundColor: Colors.white,
title: Text(
'Very verse',
style: TextStyle(
color: Colors.black,
fontSize: 20,
),
),
centerTitle: true,
leading: IconButton(
onPressed: () {
Navigator.pop(context);
},
color: Colors.black,
iconSize: 25,
icon: Icon(Icons.arrow_back),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.bookmark_outline),
iconSize: 25,
color: Colors.black,
onPressed: () {
print('GD');
}),
],
);
}
For WillPopScope class
For Scaffold class
For AppBar
Your result screen ->
How to create a button that has text and an icon by using the latest button widget ElevatedButton.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Elevated Button',
home: FlutterExample(),
);
}
}
class FlutterExample extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Elevated Button with Icon and Text')),
body: Center(
child: ElevatedButton.icon(
icon: Icon(
Icons.home,
color: Colors.green,
size: 30.0,
),
label: Text('Elevated Button'),
onPressed: () {
print('Button Pressed');
},
style: ElevatedButton.styleFrom(
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(20.0),
),
),
)));
}
}
you can add Row() or Wrap() Widget with multiple children in this case Icon() and Text()
ElevatedButton(
onPressed:() {},
child: Wrap(
children: <Widget>[
Icon(
Icons.favorite,
color: Colors.pink,
size: 24.0,
),
SizedBox(
width:10,
),
Text("Click me!", style:TextStyle(fontSize:20)),
],
),
),
You can use ElevatedButton.icon constructor:
ElevatedButton.icon(
onPressed: () {
//OnPressed Logic
},
icon: const Icon(Icons.plus_one),
label: const Text(
"Button Text"
)
),
You can use ElevatedButton.icon constructor for this like
ElevatedButton.icon(
icon: const Icon(Icons.add, size: 18),
label: Text('My elevated button'),
onPressed: () {},
),
i'm trying to make an appbar as a class for one of my page of my app (only used on 1 page).
I'd like to have addStoryAppBar for my code to be easier to read. How do I do this ? I've tried to create a widget, but it remove the leading back icon
class StoryAddPage extends StatefulWidget {
const StoryAddPage({Key key}) : super(key: key);
#override
_StoryAddPageState createState() => _StoryAddPageState();
}
class _StoryAddPageState extends State<StoryAddPage> {
#override
Widget build(BuildContext context) {
AppBar addStoryAppBar = AppBar(
backgroundColor: Colors.white,
title: Text(
AppLocalizations.of(context).add_story,
style: TextStyle(
color: AppColors.Black,
fontWeight: FontWeight.w700,
fontSize: 16),
),
leading: SvgPicture.asset(
"lib/assets/images/back.svg",
semanticsLabel: 'Back icon',
fit: BoxFit.none,
height: 10,
),
actions: [
GestureDetector(
child: Image.asset('lib/assets/images/select_picture.png'),
onTap: () => {},
),
Padding(
padding: const EdgeInsets.all(10.0),
child: ElevatedButton(
style: kOrangeButton,
onPressed: () => {},
child: Container(
child: Text(
AppLocalizations.of(context).publier,
style: TextStyle(color: AppColors.Black),
),
),
),
),
],
);
return SafeArea(
child: Scaffold(
appBar: addStoryAppBar,
body: Container(
child: Text('Add story'),
),
),
);
}
}
Also tried to extends the AppBar, but how do I pass the context ? Is this the more adapted thing to do ?
class StoryAppBar extends AppBar {
StoryAppBar()
: super(
iconTheme: IconThemeData(
color: Colors.black, //change your color here
),
backgroundColor: Colors.white,
title: Text(
AppLocalizations.of(context).add_story,
style: TextStyle(
color: AppColors.Black,
fontWeight: FontWeight.w700,
fontSize: 16),
),
elevation: 0.0,
automaticallyImplyLeading: false,
actions: <Widget>[
IconButton(
icon: Icon(Icons.notifications),
onPressed: () => null,
),
IconButton(
icon: Icon(Icons.person),
onPressed: () => null,
),
],
);
}
You can extract the AppBar widget to a statefull or stateless widget.
Create your own leading back icon. Just create Text Button, like this:
TextButton.icon(
onPressed: () {
Navigator.pop(context);
},
icon: Icon(Icons.arrow_back_rounded),
label: Text(''),
),
Create a separate method that returns AppBar to your screen widget. Add the below method in a new class and call this method from anywhere you want to show AppBar
AppBar getApplicationAppBar(BuildContext context) {
return AppBar(
backgroundColor: Colors.white,
title: Text(
AppLocalizations
.of(context)
.add_story,
style: TextStyle(
color: AppColors.Black,
fontWeight: FontWeight.w700,
fontSize: 16),
),
leading: SvgPicture.asset(
"lib/assets/images/back.svg",
semanticsLabel: 'Back icon',
fit: BoxFit.none,
height: 10,
),
actions: [
GestureDetector(
child: Image.asset('lib/assets/images/select_picture.png'),
onTap: () => {},
),
Padding(
padding: const EdgeInsets.all(10.0),
child: ElevatedButton(
style: kOrangeButton,
onPressed: () => {},
child: Container(
child: Text(
AppLocalizations
.of(context)
.publier,
style: TextStyle(color: AppColors.Black),
),
),
),
),
],
);
}
If back button functionality not works, then use GestureDetector on Back Button
leading: GestureDetector(
onTap: () {
Navigator.pop(context);
},
child: SvgPicture.asset(
"lib/assets/images/back.svg",
semanticsLabel: 'Back icon',
fit: BoxFit.none,
height: 10,
),
),
if you have stateless widget you can Easily implement PreferredSizeWidget
this example show you how do that :
class CustomAppbar extends StatelessWidget implements
PreferredSizeWidget{
const CustomAppbar({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Container();
}
#override
Size get preferredSize => Size(15.h, 100.w);
}
if you are using StatefulWidget you can copy paste this code
class CustomAppbar extends StatefulWidget implements PreferredSizeWidget {
final bool? isBack;
final TextEditingController? controller;
const CustomAppbar({Key? key, this.isBack, this.controller})
: super(key: key);
#override
State<CustomAppbar> createState() => _CustomAppbarState();
#override
Size get preferredSize => Size(15.h, 100.w);
}
class _CustomAppbarState extends State<CustomAppbar> {
#override
Widget build(BuildContext context) {
return Container()
}
}
and now you can use class on appbar
Scaffold(
appBar: CustomAppbar(
);
the rason for that if you enter to appbar you will see
/// An app bar to display at the top of the scaffold.
final PreferredSizeWidget? appBar;
the app bar is PreferredSizeWidget
and PreferredSizeWidget implement Widget Class
which contain get method
Size get preferredSize;
Question
How can I change the duration and colour of the on tap ripple effect on an ElevatedButton? See the dart pad link for a working example of this ripple effect.
Code for working ElevatedButton
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
/// This is the main application widget.
class MyApp extends StatelessWidget {
static const String _title = 'Flutter Code Sample';
#override
Widget build(BuildContext context) {
return MaterialApp(
title: _title,
home: Scaffold(
appBar: AppBar(title: const Text(_title)),
body: MyStatelessWidget(),
),
);
}
}
class MyStatelessWidget extends StatelessWidget {
MyStatelessWidget({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Center(
child: ElevatedButton(
onPressed: () {},
child: const Text('Elevated Button', style: TextStyle(fontSize: 20)),
),
);
}
}
DartPad Link
https://dartpad.dev/369b01f31b06c18d4f47076319aa4da4
It's pretty simple. Just make sure you return your desired overlay color when the current MaterialState is pressed.
Scaffold(
body: Center(
child: ElevatedButton(
onPressed: () {},
style: ButtonStyle(
overlayColor: MaterialStateProperty.resolveWith(
(states) {
return states.contains(MaterialState.pressed)
? Colors.red
: null;
},
),
),
child: const Text(
'Elevated Button',
style: TextStyle(fontSize: 20),
),
),
),
),
Better still, you can use this as your buttonStyle:
ElevatedButton.styleFrom(
onPrimary: Colors.yellow,
),
The only problem with this is that it affects your foreground color, but that's not too bad.
So your button with a custom splash should look like this:
ElevatedButton(
onPressed: () {},
style: ElevatedButton.styleFrom(
onPrimary: Colors.yellow,
),
child: const Text(
'Elevated Button',
style: TextStyle(fontSize: 20, color: Colors.white),
),
),
Changing the duration of the splash, however, is NOT possible, because, from the source code, the button's splash factory is hardcoded, and not open for modification.
...
splashFactory: InkRipple.splashFactory,
And as this answer shows, you need to modify the splash factory to change the duration.
If you really need that functionality, the quickest way to get that done would be to copy the code from the source and re-implement it yourself. But I wouldn't recommend that.
The more appropriate way you could do this would be to create your own custom button using a Material and an InkWell, but that wouldn't be an elevated button
With Flutter 2.0, try this
ElevatedButton(
style: ButtonStyle(
overlayColor: MaterialStateProperty.all<Color>(Colors.black12)),
onPressed: () {},
child: Text('Ripple'))
You can use animationDuration for duration and onPrimary to change splash color.
return ElevatedButton(
onPressed: action,
child:
Text(text, style: Theme.of(context).textTheme.subtitle1),
style: ElevatedButton.styleFrom(
onPrimary: Colors.black,
animationDuration: Duration(milliseconds: 1000),
primary: Colors.red,
shadowColor: Colors.redAccent,
elevation: 10,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15),
),
),
);
I'm trying to change the icon and color of my drawer widget in Dart. I've found ways of doing it but none that apply to my scenario. My custom drawer widget is being returned from another class and so I can't change the leading icon in the home class where the app bar is or it will replace my current drawer. I won't show all the code because I don't believe it would be necessary. Any help would be appreciated.
My Current drawer and method of calling it:
Drawer class:
import 'package:flutter/material.dart';
import 'package:new_app/Users.dart';
import '../main.dart';
class MainDrawer extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Drawer(
child: Column(
children: <Widget>[
Container(
width: double.infinity,
padding: EdgeInsets.all(20),
color: Theme.of(context).primaryColor,
child: Center(
child: Column(
children: [
Container(
Menu Class/ home page:
import 'screens/drawer_main.dart';
class Home extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
#override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
return new Future(() => false);
},
child: Scaffold(
backgroundColor: Colors.blueGrey[900],
appBar: AppBar(
//backgroundColor: Colors.blueGrey[900],
backgroundColor: Colors.transparent,
automaticallyImplyLeading: true,
title: Text(
"Home Page",
style: TextStyle(color: Colors.white),
),
actions: <Widget>[
//Profile Pic
IconButton(
icon: Icon(Icons.circle, color: Colors.white),
tooltip: 'Comment Icon',
onPressed: () {},
),
MainPopUp(), //IconButton
],
//IconButton
brightness: Brightness.dark,
),
//Current Method of Calling the Drawer:
drawer: MainDrawer(),
body: Center(
Add the leading property in the App Bar and then call the Drawer Widget Programmatically.
Scaffold(
backgroundColor: Colors.blueGrey[900],
appBar: AppBar(
//backgroundColor: Colors.blueGrey[900],
leading: Builder(
builder: (context) => IconButton(
icon: Icon(Icons.menu_rounded),
onPressed: () => Scaffold.of(context).openDrawer(),
),
),
backgroundColor: Colors.transparent,
automaticallyImplyLeading: true,
title: Text(
"Home Page",
style: TextStyle(color: Colors.white),
),
actions: <Widget>[
//Profile Pic
IconButton(
icon: Icon(Icons.circle, color: Colors.white),
tooltip: 'Comment Icon',
onPressed: () {},
),
MainPopUp(), //IconButton
],
//IconButton
brightness: Brightness.dark,
),
//Current Method of Calling the Drawer:
drawer: MainDrawer(),
Add a leading inside AppBar() and open drawer programatically.
AppBar(
leading: InkWell(
child: Icon(
//your preferred icon
Icons.camera
),
onTap: () {
Scaffold.of(context).openDrawer();
},
),
)