I have a problem with building a specific layout in flutter.
What I need is:
Scrollable screen, with two columns, where the first col is of certian (but dynamic) height. And the second col has part of certain (but dynamic) height and the rest of the col I want to fill remaining space.
The code structure.
Row(
children: [
Expanded(
child: Column(children:[
someDynamicHeightWidgetsHere()])),
Expanded(child: Column(children: [
someWidgetsHere(),
here fill remainind space to match the first column]))
]
)
Use IntrinsicHeight, This widget only expands to its child height.
This class is useful, for example, when unlimited height is available and
you would like a child that would otherwise attempt to expand infinitely to
instead size itself to a more reasonable height.
Example:
IntrinsicHeight(
child: Row(
children: [
Expanded(
child: Column(
children: [
Container(
height: 800,
color: Colors.blue,
),
],
),
),
Expanded(
child: Column(
children: [
Container(
height: 400,
color: Colors.red,
),
Expanded(
child: Container(
color: Colors.yellow,
),
),
],
),
),
],
),
Output:
Related
I want to make children use flexible sizes
how can i set the size of the child inside the row? can you guys help me? and find the error constraint
anyone help me
return SafeArea(
child: Column(
children: [
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Row(
children: [
Container(
color: Colors.lightBlue,
child: Row(
children: [
Expanded(
flex: 5,
child: Container(
color: Colors.green,
),
),
Expanded(
flex: 5,
child: Container(
color: Colors.blue,
),
)
],
),
)
],
),
)
],
),
);
To place children in a row you can use Flexible widget. The value of flex defines how much space each child should take. In the example that you provided.. Both children will be equally spaced since you gave flex value 5 for both.
return Scaffold(
body: Center(
child: SizedBox(
height: 50,
child: Row(
children: [
Flexible(
flex: 5,
child: Container(
color: Colors.red,
)),
Flexible(
flex: 5,
child: Container(
color: Colors.green,
)),
],
),
),
),
);
If you change the flex value to 1 and 5.. Now the total divisions will be 6 and out of that the first child will take 1 part and the second child will take 5 parts like below
return Scaffold(
body: Center(
child: SizedBox(
height: 50,
child: Row(
children: [
Flexible(
flex: 1,
child: Container(
color: Colors.red,
)),
Flexible(
flex: 5,
child: Container(
color: Colors.green,
)),
],
),
),
),
);
Also if you use a singleChildScrollView and an expanded inside that it then the expanded widget has no bounds so it will throw an error. So wrapping the Expanded with a SizedBox with a specific width will give you expected results.
EDIT
To have a SingleChildScrollView with dynamic content in the row you can do this
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Row(
mainAxisSize : MainAxisSize.min,
children:[
SizedBox(
width: 100,//this is important since its a row and the row will take full width and throw an error.
child: Image.asset(""),
),
//Another SizedBox or Text or any widget..
]
)
)
I'm trying to put a text inside de window. However, it is out of pixels and I don't know how to fix it.
This is how it looks now:
This is part of my code:
SizedBox(
width: MediaQuery.of(context).size.width * 0.7,
child:
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(children: [
Text('FRI, 4 MAR · 16:00', style: dateStyle),
],),
Row(children: [
Text('Chess Competition at Tetuan',
style: eventStyle, textAlign: TextAlign.left),
],),
),
I want that if the text (that for the moment is hardcoded) can't be shown in the same line, automatically changes to the other.
Try below code, Wrap your Text inside Expanded Widget
SizedBox(
width: MediaQuery.of(context).size.width * 0.7,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Expanded(
child: Text(
'FRI, 4 MAR · 16:00',
),
),
],
),
Row(
children: [
Expanded(
child: Text(
'Chess Competition at Tetuan',
),
),
],
),
],
),
),
Result screen->
By default Row widget tries to give infinite width space for all its children so text widget is getting infinite width.
To make text widget render text on next line we need to provide fix width.
To achieve that you can use Expanded widget, it will take all space available such that it fits the constraint of the row.
SizedBox(
width: MediaQuery.of(context).size.width * 0.7,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Expanded(
child: Text(
'FRI, 4 MAR · 16:00',
),
),
],
),
Row(
children: [
Expanded(
child: Text(
'Chess Competition at Tetuan',
),
),
],
),
],
),
),
You may use Flexible to resize the widgets in rows and columns. It's mainly used to adjust the space of the different child widgets while keeping the relation with their parent widgets.
Meanwhile, Expanded changes the constraints sent to the children of rows and columns; it helps to fill the available spaces there. Therefore, when you wrap your child in an Expanded widget it fills up the empty spaces.
Providing these videos from the Flutter's Official YouTube channel just to help out people, who might look for this in the upcoming future...
1.Expanded
2.Flexible
Example:
Flexible(
child: Text()),
Expanded(
child: Text()),
Wrap your text widget in a Flexible widget as follows-
SizedBox(
width: MediaQuery.of(context).size.width * 0.7,
child:
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(children: [
Text('FRI, 4 MAR · 16:00', style: dateStyle),
],),
Row(children: [
//Start of flexible widget
Flexible(
child:Text('Chess Competition at Tetuan',
style: eventStyle, textAlign: TextAlign.left),
],),),
),
I would like to have this image fill the available space between the top element and the bottom element. Also I would like the bottom text to be always at the bottom.
This is how I implemented it right now:
Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Column(children: topWidgets),
Container(
color: Colors.red,
child: Column(children: [
Image.asset("assets/empty_state/illustration_01.png", height: 200),
Text("No matches so far")
]),
)
]
)
I have tried to use the fit property of the Image without luck. If I don't use height: 200 I wouldn't be able to see the bottom text because it would go out of the screen (at the bottom)
I don't know if having a Column wrapping text and image is a good approach but I think it is the best among the ones I tried so far.
Container(
height: MediaQuery.of(context).size.height, //for max height
width: MediaQuery.of(context).size.width,//for max width
child: Column(
children: [
Expanded(
flex: 1, // flex is used to expand less/more the contained widget
child: topWidgets),
Expanded(
flex: 3,
child: Container( //for red background
color: Colors.red,
child: Column(
mainAxisAlignment: MainAxisAlignment.end,
children: [
Expanded(
flex: 3, //increase to fill more space of picture
child: FittedBox(
fit: BoxFit.fill, // the picture will acquire all of the parent space.
child: Image.asset("assets/empty_state/illustration_01.png"),
)),
Expanded(
flex: 1, //by default flex is 1. so don't do this and save a line
child: Text("No matches so far"),)
],
),
))
],
),
)
I need create this UI in my flutter app:
It is row for my list. This is my code:
return Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
CachedNetworkImage(
imageUrl: photoUrl,
imageBuilder: (context, imageProvider) => Container(
height: 112,
width: 90,
),
),
const SizedBox(
width: 14,
),
Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'${title}',
),
Align(
alignment: Alignment.centerLeft,
child: SizedBox(
width: descriptionWidth,
child: Text(
'${shortDescription}',
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
),
),
Text(
'${footer}',
),
],
)
],
);
I need the test block to occupy a height equal to the image. but when the text is all in the middle, it takes up a lot less height. this is an example of how my code works now:
how do I fix this? How to stretch Column inside Row to maximum available height?
I tried several options but then it breaks the display of multi-line text.
While height is fixed, you can wrap Column with SizedBox(height:112) and to control textOverflow, wrap SizedBox with Expanded.
Expanded(
child: SizedBox(
height: 112,
child: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Full method
return Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Container(
/// replace with image
height: 112,
width: 90,
color: Colors.red,
),
const SizedBox(
width: 14,
),
Expanded(
child: SizedBox(
height: 112,
child: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'${title}',
),
Flexible(
child: Text(
'${shortDescription}',
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
),
Text(
'${footer}',
),
],
),
),
)
],
);
For Maximum Height You can use
Expanded(
child : --- your child widget
)
or
Flexible(
child: -- your child widget
)
A widget that expands a child of a Row, Column, or Flex so that the child fills the available space.
Using an Expanded widget makes a child of a Row, Column, or Flex expand to fill the available space along the main axis (e.g., horizontally for a Row or vertically for a Column). If multiple children are expanded, the available space is divided among them according to the flex factor.
An Expanded widget must be a descendant of a Row, Column, or Flex, and the path from the Expanded widget to its enclosing Row, Column, or Flex must contain only StatelessWidgets or StatefulWidgets (not other kinds of widgets, like RenderObjectWidgets).
First of all, you need to fixed the card height for better positioning of your text with the card image and then expand your column to dynamically handle the multiline of text. ANd you don't need to use the align widget
try the below code
Container(
height: 112, // here you fixed the container height
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
CachedNetworkImage(
imageUrl:
"https://avatars.githubusercontent.com/u/26745548?v=4",
imageBuilder: (context, imageProvider) => Container(
height: 112,
width: 90,
),
),
const SizedBox(
width: 14,
),
Expanded(
// here expand your column
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'title',
),
Text(
'{shortDescription 23487509387 2039487502930349857 03984 5 30498 503498 503948 70293847 50923487503}',
),
Text(
'footer',
),
],
),
)
],
),
)
output:
I am trying to center a group of objects within a row using Flutter/Dart. I have tried various methods and all have failed. I want the icon to be to the left of the screen and the remaining variables (trips, followers, and following) to be centered in the remaining space. I have tried it a variety of ways using the MainAxisAlignment and CrossAxisAlignment classes based on some solutions I found on SO but none have worked. What am I doing wrong?
Column(
children: <Widget>[
ClipOval(
child: Material(
color: Colors.grey, // button color
child: InkWell(
child: SizedBox(
width: 80,
height: 80,
child: Align(
alignment: Alignment.center,
child: Icon(
Icons.person,
size: 65.0,
),
),
),
),
),
)
],
),
Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
trips, followers, following,
],
),
],
),
Image 1: How it currently looks
Image 2: Flutter Inspector View
You want to evenly distribute the space right from the icon between the three texts, right?
I would solve this by wrapping the 3 widgets in another row for the rest of the space without the icon and then wrapp the Text in an expanded widget that fills the rest of the space.
i assume that trips, followers and following are columns.
Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Column(
children: <Widget>[
ClipOval(
....(your stuff)
)
]
),
Row(
children: <Widget>[
Expanded(
child: trips
),
Expanded(
child: followers
),
Expanded(
child: following
),
]
)
]
) //Row End
In the Row documentation you can see how the expanded takes a third of the available space. [1]