There is a box in which I need to animate a child consisting of a Row in which there are two Text. (In short - running line). Both texts in the result must be on the same line.
The child I want to animate is wider than the parent anyway and when animating, an overflow error pops up.
Overflow error
How can this be avoided?
This is code:
final Widget content = SizedBox(
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Text('TEXT 1'),
Text('TEXT 2')
],
),
);
#override
Widget build(BuildContext context) {
return
Container(
alignment: Alignment.center,
width: widget.parentWidth,
height: UI_SIZE,
child: ClipPath(
clipBehavior: Clip.hardEdge,
child: SlideTransition(
position: _offsetAnimation,
child: content,
),
),
);
}
try this
final Widget content = SizedBox(
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Expanded(child: Text('TEXT 1'),),
Expanded(child: Text('TEXT 2'),),
],
),
);
I was able to fix it with OverflowBox.
final Widget content = OverflowBox(
maxWidth: double.infinity,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Text('TEXT 1'),
Text('TEXT 2')
],
),
);
Maybe someone will help this solution
Related
I started to develop in Flutter recently and I am having difficulties in centralizing a Widget completely in the available space of View.
This is how it looks:
And here's what I want to achieve:
And here's my code:
LayoutBuilder(builder:
(BuildContext context, BoxConstraints viewportConstraints) {
return SingleChildScrollView(
child: ConstrainedBox(
constraints: BoxConstraints(
minHeight: viewportConstraints.maxHeight,
),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Column(children: [
NavHeader("Deposit"),
BalanceHeader(widget.usd),
]),
Column(
mainAxisSize: MainAxisSize.min,
children: [
Text(
"How much do you want deposit?",
style:(
...
),
),
Container(
alignment: Alignment.center,
width: width * 0.4,
margin: EdgeInsets.only(top: 10),
child: Row(
...
),
),
],
),
],
),
),
);
}),
bottomNavigationBar: BottomAppBar(
...
),
),
);
}
By using MainAxisSize.min The height of the Column will be according to the combined height of its children and incoming height from the parent will be ignored. That means your column height has shrinked to its children.
There is you can use MainAxisSize.max instead of MainAxisSize.min to max height of column. And also you have to use mainAxisAlignment: MainAxisAlignment.center for aligning childrens to center of column.
Your Second Column
Column(
mainAxisSize: MainAxisSize.min,
children: [
Text(
"How much do you want deposit?",
style:(
...
),
),
Container(
alignment: Alignment.center,
width: width * 0.4,
margin: EdgeInsets.only(top: 10),
child: Row(
...
),
),
],
),
Edited Column
Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.center
children: [
Text(
"How much do you want deposit?",
style:(
...
),
),
Container(
alignment: Alignment.center,
width: width * 0.4,
margin: EdgeInsets.only(top: 10),
child: Row(
...
),
),
],
),
Well, there is a widget for that!
As for most things in flutter just Wrap the Widgets you want centered inside a Center widget and you should achieve what you want.
Column(
mainAxisAlignment: MainAxisAlignment.center,
children ... Your code
)
You could also wrap your widget with the Column widget and it will work only for the X coordinates.
(It has already been stated but poorly)
I am trying to align column with text to far right side of the window but somehow its not happening.
Tried with MainAxisAlignment.right , CrossAxisAlignment.right but somehow nothing is working out for me. Below is my Dart code,
class MVTHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
final height = MediaQuery.of(context).size.height;
final width = MediaQuery.of(context).size.width;
return Scaffold(
body: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Container(
height: 550,
width: width,
child: Row(
children: [
Lottie.network(
'https://assets2.lottiefiles.com/datafiles/6WfDdm3ooQTEs1L/data.json'),
Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Text("Multivariate Testing"),
Text('Run experiments to make key flows more effective.'),
// ignore: deprecated_member_use
TextButton(
onPressed: () {}, child: Text('Create Experiment')),
],
),
],
),
),
Container(
height: height,
width: width,
color: Colors.blueAccent,
)
],
),
));
}
}
I am seeing this in the output
While you are using the Row widget,
Add mainAxisAlignment: MainAxisAlignment.spaceBetween to it.
So your code should be like this
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween, // <-- Add this
children: [
Lottie.network(
When your Row's children are being rendered, by giving it MainAxisAlignment.spaceBetween, we are essentially telling the Row to place its children as far apart from each other as possible.
In the case of 2 children, it means 1 child to the extreme left and other to the extreme right.
I have a Row widget on the bottom of the page that I can't center. I've tried all the mainAxisAlignment's and crossAxisAlignment's there are, as well as wrapping it in an Align widget and setting alignment to alignment.center and it's still on the left edge of the page. I've tried everything and am really stuck. Any help would be appreciated.
The Page (Updated)
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.lightBlue,
centerTitle: true,
elevation: 5,
title: Text("Pathomatic")),
body: Container(
decoration: new BoxDecoration(color: Colors.black),
child: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Expanded(
flex: 2,
child: new Stack(
children: <Widget>[
new Container(
alignment: Alignment.center,
child: _cameraPreviewWidget(context),
),
new Align(
alignment: Alignment.center,
child: GestureDetector(
child: Stack(children: <Widget>[
Positioned(
top: yPosition,
left: xPosition,
child: Container(
// padding: EdgeInsets.only(top: 200.0, left: 20.0),
height: MediaQuery.of(context).size.height / 3,
width: MediaQuery.of(context).size.width / 3,
child:
Image.asset('assets/images/crosshair.png'),
),
),
]),
onPanUpdate: (tapInfo) {
setState(() {
xPosition += tapInfo.delta.dx;
yPosition += tapInfo.delta.dy;
});
}),
),
],
),
),
SizedBox(height: 5),
Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
_cameraTogglesRowWidget(),
_mlTextWidget(),
],
),
_captureControlRowWidget(context),
//SizedBox(width: 50),
],
),
SizedBox(height: 5),
],
),
),
),
);
}
This is usually because the widget you are trying to center is actually stretching its container. Since it's the size of the screen, it's contents stick to the left. You should use the Flutter Inspector with select widget mode to actually see how large your row is. Then everything will make much more sense.
In your code, your Row is stretching. Try
Row(mainAxisSize: MainAxisSize.min
This should make it not grow. Alternatively, you can keep the row large but make it center its children:
Row(mainAxisAlignment: MainAxisAlignment.Center
Of course, with this approach its children will get close to each other in the center. You can use a SizedBox between them, or use some other way of spacing them apart.
I am trying to build a view as in the image below.
The tweet your reply is just stack at the bottom while the other stuff are scrollable.
I've been banging my head on how to achieve this for a couple of hours.
Exactly;y like in the image below. There are four sections:
The post (tweet)
The row of icons
The comments (which scrolls)
The tweet your reply which is static
The solution would be to use the Align Widget. So in your Stack you would put as the last element in the stack:
Align(
alignment: Alignment.bottomCenter,
child: // your widget would go here
),
I'm judging by your question that you have figured out how to do all of the other parts, and was just wondering about the bottom part. You can use Align to align things in other ways as well (such as topCenter, bottomLeft, etc). Hope this helps, and if so please up vote and accept as answer and if not leave a comment below.
Edit:
I wouldn't use a Stack. I would wrap the entire widget tree in a Column, and put the post in a Expanded Widget with a flex factor of 1, and a Row of Icons below it. Then put a ListView in an Expanded Widget with a flex of 4 (you can experiment with values). And lastly in the Column I would add you "Tweet you reply" Widget.
Simple layout code to give you an idea of how to implement it:
Column(
children: <Widget>[
Expanded(
child: ListView(
shrinkWrap: true,
children: <Widget>[
//your post
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
// your icons
],
),
//your comments
],
),
),
Align(
alignment: Alignment.bottomCenter,
child: // you textField,
),
],
)
Try this
class Home extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Expanded(
child: Column(
children: <Widget>[
Container(
padding: EdgeInsets.all(50),
child: Center(
child: Text(
"A POST"
),
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Icon(Icons.details),
Icon(Icons.print),
Icon(Icons.translate),
Icon(Icons.map)
],
),
Expanded(
child: ListView(
children: List.generate(10, (index) => ListTile(title: Text("Comment $index"),)),
),
)
],
),
),
TextField(
decoration: InputDecoration(
labelText: "Tweet your reply"
),
)
],
),
),
);
}
}
The output:
If you want the post to scroll with it, this should help
import 'package:flutter/material.dart';
class Home extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Expanded(
child: SingleChildScrollView(
child: Column(
children: <Widget>[
Container(
padding: EdgeInsets.all(50),
child: Center(
child: Text(
"A POST"
),
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Icon(Icons.details),
Icon(Icons.print),
Icon(Icons.translate),
Icon(Icons.map)
],
),
Column(
children: List.generate(10, (index) => ListTile(title: Text("Comment $index"),)),
)
],
),
),
),
TextField(
decoration: InputDecoration(
labelText: "Tweet your reply"
),
)
],
),
),
);
}
}
I'm trying to bottom-center a widget at the bottom of a Column, but it keeps aligning to the left.
return new Column(
new Stack(
new Positioned(
bottom: 0.0,
new Center(
new Container(),
),
),
),
);
The existence of the Positioned forces the Container to the left, instead of centering. Removing the Positioned, however, puts the Container in the middle-center.
Align is the way to go if you have only one child.
If you have more, consider doing something like this:
return new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
// Your elements here
],
);
The easiest and the correct way to do it - use Spacer()
Example:
Column(
children: [
SomeWidgetOnTheTop(),
Spacer(),
SomeCenterredBottomWidget(),
],
);
Expanded(
child: Align(
alignment: FractionalOffset.bottomCenter,
child: Padding(
padding: EdgeInsets.only(bottom: 10.0),
child: //Your widget here,
),
),
),
I have used this approach,
What i want is, A layout always in bottom but whenever Keyboard pops-up that layout also comes over it
body: Container(
color: Colors.amber,
height: double.maxFinite,
child: new Stack(
//alignment:new Alignment(x, y)
children: <Widget>[
new Positioned(
child: myWidget(context, data.iconName, Colors.red),
),
new Positioned(
child: new Align(
alignment: FractionalOffset.bottomCenter,
child: myWidget(context, data.iconName, Colors.green)
),
)
],
),
),
1) You can use an Align widget, with FractionalOffset.bottomCenter.
2) You can also set left: 0.0 and right: 0.0 in the Positioned.
Just expanding the answers:
Spacer is an option no one mentioned yet; it is used in case you prefer not to use Positioned / Align.
Align works if you want to specify the alignment of a child inside a parent. Use it anywhere but directly inside Stack
Positioned is similar to Align, but works only under Stack directly.
Design everything using Expanded() is one of the easiest way to do this
Column(
children: [
Expanded(
child: Placeholder(),
flex: 1,
),
Expanded(
child: Placeholder(),
flex: 10,
),
Expanded(
flex: 2,
child: Placeholder(),
)
],
),
If you wish to leave content as it, can wrap it with scrollable.
Useful if you have inputs in the children:
return Stack(
children: <Widget>[
Positioned(
child: SingleChildScrollView(
child: Column(
children: children
..add(Container(
height: 56, // button heigh, so could scroll underlapping area
)))),
),
Positioned(
child: Align(
alignment: Alignment.bottomCenter,
child: button,
),
)
],
);
Widget _bottom() {
return Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Expanded(
child: Container(
color: Colors.amberAccent,
width: double.infinity,
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: new List<int>.generate(50, (index) => index + 1)
.map((item) {
return Text(
item.toString(),
style: TextStyle(fontSize: 20),
);
}).toList(),
),
),
),
),
Container(
color: Colors.blue,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'BoTToM',
textAlign: TextAlign.center,
style: TextStyle(fontSize: 33),
),
],
),
),
],
);
}
Wrap your Container in SingleChildScrollView() widget. Then it will not come above when keyboard pops up.
In addition of Stack:
to avoid floating container on keyboard, use this
return Scaffold(
appBar: getAppBar(title),
resizeToAvoidBottomInset: false,
body: