I first want to center one widget and then add another widget to the right of the center widget.
Currently, flutter APIs are not feasible for this. In android, it can be easily done in relative layout or constraint layout.
I tried with some hack with MediaQuery,
Stack(
children: [
Center(child: Text(17)),
Positioned(
bottom: 0,
left: (screenWidth / 2) + (screenWidth / 3),
child: Column(
children: []
)
)
How to try this in an easy way or a proper way.
You can use the Align widget for this.
Code Example
import 'package:flutter/material.dart';
class SandBox extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
width: 300,
height: 300,
color: Colors.blue,
child: Align(
alignment: Alignment.centerRight, //aligns the child widget to the right center
child: Text('17'),
),
),
),
);
}
}
Maybe, it can help you to achieve what you want:
import 'package:flutter/material.dart';
final Color darkBlue = Color.fromARGB(255, 18, 32, 47);
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Center(
child: MyWidget(),
),
),
);
}
}
class MyWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
height: 30,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: Text('17'),
),
Align(
alignment: Alignment.bottomRight,
child: Container(
width: 10,
height: 10,
decoration: BoxDecoration(
color: Colors.black,
shape: BoxShape.circle,
),
),
),
],
),
);
}
}
Or you can adjust it using some calculations using MediaQuery and Stack.
You can use badges package to achieve this goal.
Finally, I found used https://pub.dev/packages/align_positioned
AlignPositioned.relative(
Text(day.englishDate.toString(),
textScaleFactor: 3, style: dayTextStyle),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
....
],
),
moveByChildWidth: 1.1,
minChildWidthRatio: 1,
moveByChildHeight: 0.3)
Please use Align along with Row.
here is simple code to achieve this.
import 'package:flutter/material.dart';
final 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: Stack(
children:[
Align(
child : Row(
mainAxisAlignment: MainAxisAlignment.center,
children:[
Padding(child: Text('Left'),padding: EdgeInsets.all(5)),
Text('Center widget'),
Padding(child: Text('Right'),padding: EdgeInsets.all(5))
]) ,
alignment: Alignment.center),
]
),
),
);
}
}
Here is the output:
Related
There are two main widgets:
I have this OverflowingWidget that is basically a Column - in reality this contains many widgets - However for this example, it has been given a height bigger than its parent widget.
The Parent widget ContainerWidget is basically AnimatedSwitcher which is basically a Stack contained by Column which constrained by a hight less than OverflowingWidget.
As you can see in dart-pad there is an overflow. The OverflowingWidget.
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: ContainerWidget(),
),
),
);
}
}
class ContainerWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.red,
height: 100,
width: 50,
child: Column(
mainAxisSize: MainAxisSize.max,
children: [
Expanded(
child: ClipRect(
child: AnimatedSwitcher(
duration: const Duration(milliseconds: 300),
child: OverflowingWidget(),
layoutBuilder: (currentChild, previousChildren) => Stack(
children: [
...previousChildren,
if (currentChild != null) currentChild,
],
)),
),
),
],
));
}
}
class OverflowingWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Column(
children: [Container(color: Colors.blue, height: 150, width: 50)]);
}
}
Desired result:
I need the OverflowingWidget to be clean clipped without trying to resize the content inside. The same effect that can be obtained when in css:overflow:hidden.
AnimatedSwitcher is getting height 100, but it needs 150 for current widget. you can increase the height on redContainer.
Instead of using Column, you can use Stack widget.
class ContainerWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
color: Colors.red,
height: 150,
width: 50,
child: Stack(
children: [
ClipRect(
child: AnimatedSwitcher(
duration: const Duration(milliseconds: 300),
child: OverflowingWidget(),
layoutBuilder: (currentChild, previousChildren) => Stack(
children: [
...previousChildren,
if (currentChild != null) currentChild,
],
)),
),
],
));
}
}
I found a way to clip an overflowing column/row. Simply wrap that column/row with Wrap widget. That will do the clipping.
class OverflowingWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Wrap(children: [
Column(children: [
Container(
color: Colors.blue,
height: 150,
width: 50)
])
]);
}
}
I am trying to make an audio player app,
and I want to make the player screen fit the whole screen size.
However, the padding at the top and at the bottom doesn't help.
I tried to remove the SafeArea from bottomNavigationBar and other widgets and it didn't work.
How can I handle this?
Image of the player:
(the gray color padding doesn't let the image stretch to the end)
the code of the player:
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: false,
backgroundColor: const Color(0xff1c1c1e),
body: GetBuilder<OverlayHandler>(
builder: (getContext) {
if (!Get.find<OverlayHandler>().inPipMode) {
return Stack(
children:[
Container(...)
]
); // player at full screen
} else {
return Stack(...); // player at PiP mode
}
}
)
);
}
the code of the main screen widget:
Widget build(BuildContext context) {
return GetBuilder<NavigationController>(
builder: (controller) {
return Scaffold(
body: SafeArea(
// bottom option of this SafeArea doesn't affect the player size
child: IndexedStack(
index: controller.tabIndex,
children: const [
...
],
),
),
bottomNavigationBar: SafeArea(
// bottom option of this SafeArea doesn't affect the player size
child: SizedBox(
height: 80,
child: BottomNavigationBar(
items: [
...
],
),
),
),
);
}
);
}
}
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
const HomeScreen({super.key});
#override
State<HomeScreen> createState() => _HomeScreenState();
}
TextEditingController controller = TextEditingController();
bool hasHash = false;
class _HomeScreenState extends State<HomeScreen> {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
Container(
height: double.infinity,
decoration: const BoxDecoration(
image: DecorationImage(
fit: BoxFit.cover,
image: NetworkImage(
"https://cdn.pixabay.com/photo/2016/09/10/11/11/musician-1658887_1280.jpg",
),
),
),
),
Positioned(
bottom: 0,
left: 0,
right: 0,
child: Container(
height: 300,
width: double.infinity,
color: Colors.black.withOpacity(.7),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: const [
Icon(
Icons.skip_previous_rounded,
size: 55,
color: Colors.white,
),
Icon(
Icons.play_circle_fill_rounded,
size: 110,
color: Colors.white,
),
Icon(
Icons.skip_next_rounded,
size: 55,
color: Colors.white,
),
],
),
),
),
],
),
);
}
}
Android screenshot
iOS screenshot
Try removing the Scaffold()'s background color and add extendBody: true, or set the height of the container to height: double.infinity, or inside the stack just add and empty container with height as height: double.infinity,
I'm new in flutter world. I'm trying to put a little bit this logo up and add text above it.
I found that I need Stack and Positioned Widget to position my logo and sure I can position this logo with i.e: top: 20, bottom: 20 etc but then I thought, I'm positioning it versus my emulator with certain height and weidth, what about devices with other resolutions? It should be dynamic I guess?
Could you tell me how can I achieve it?
Here is how it should looks:
How it looks now (dont mind about this logo, it's just an example)
And my another question. How can I add some text above this logo?
The code I wrote:
import 'package:flutter/material.dart';
void main() {
runApp(
MaterialApp(
home: Scaffold(
backgroundColor: const Color(0xFEC2C2C2),
body: Stack(
children: <Widget>[
Positioned.fill(
child: Image(
image: AssetImage('assets/images/logo.png'),
),
),
],
),
),
),
);
}
try this code
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
padding: EdgeInsets.all(50.0),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text('This is My Brand Name',
style: Theme.of(context).textTheme.headline5),
SizedBox(
height: 20.0,
),
FlutterLogo(
size: 150,
)
],
),
),
);
}
}
Demo: https://i.stack.imgur.com/FTPqh.jpg
I want to place a paint board widget at the center of the screen and a clear button that sits top right above the paint board. I have tried column with MainAxisAlignment.center but it centers base on the board and clear button so the board is not absolutely at the center. How can I achieve this effect?
You can use positioned with stack and place where ever you want. copy and try this code in dartpad.
import 'package:flutter/material.dart';
final 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 StatelessWidget {
#override
Widget build(BuildContext context) {
return Stack(
children: [
Positioned(
top: 100,
child: Container(
width: MediaQuery.of(context).size.width,
height: 250, color: Colors.yellow)),
Positioned(
top: 60,
right: 20,
child: Icon(Icons.close, size: 32)),
]
);
}
}
Here is a similar UI with a Column widget, you can add a SizedBox below the yellow box inside the Column with the same height as the Icon, so that the yellow box appears to be centred.
So, we can avoid hardcoded values inside thr Positioned widget (that impacts responsive UI)
Here is the code snippet.
class MyWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
double iconSize = 32;
return Column(mainAxisAlignment: MainAxisAlignment.center, children: [
Container(
alignment: Alignment.centerRight,
height: iconSize,
child: Icon(Icons.close, size: iconSize),
),
Container(
width: MediaQuery.of(context).size.width,
height: 250,
color: Colors.yellow,
),
SizedBox(height: iconSize)
]);
}
}
This is my code to arrange boxes vertically.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
Widget box({width: 100.0, height: 100.0}) => Container(
width: width,
height: height,
color: Colors.grey,
);
#override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
box(),
box(),
box(),
],
),
);
}
}
Since I have a little experience for CSS flexbox, replacing the Column widget with the Row to arrange boxes in row But it can't work. Only black screen appeared. I've already make sure that the code works under the MaterialApp widget.
For learning purpose, I want to keep the code as simple as possible.
What do I need to make the above code work? What is a minimum requirement? Or is there an other widget appropriates for root in such example case?
Thank you for sparing time to read my question!
You need a material app render the colors and stuff
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Container(
color: Colors.white,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
box(),
box(),
box(),
],
),
);
);
}
}
MaterialApp widget must be a root widget
import 'package:flutter/material.dart';
void main() => runApp(MaterialApp(home: MyApp())); // <- magic
class MyApp extends StatelessWidget {
Widget box({width: 100.0, height: 100.0}) {
return Container(
width: width,
height: height,
color: Colors.grey,
);
}
#override
Widget build(BuildContext context) {
return Container(
color: Colors.white,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
box(),
box(),
box(),
],
),
);
}
}