like the title says is there a way to place a widget on bottom of screen in expanded
Expanded -> SingleChildScrollView() -> column(children: [ -> Container() -> ElevatedButton() ])
i want the ElevatedButton to be placed on the bottom of screen also i don't want to place it away of the Expanded widget, is there a way to do that ?
Expanded(
child: Column(
children: [
Container(),
//use Spacer(),
Spacer(),
ElevatedButton()
],
),
)
try use spacer inside column
SingleChildScrollView(
child: Container(
height: MediaQuery.of(context).size.height - APPBAR_SIZE,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(child: CHILD),
ElevatedButton(),
],
),
),
)
UPDATE:
Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(
height: MediaQuery.of(context).size.height - APPBAR_SIZE - ElevatedButtonHeight,
child: SingleChildScrollView(
child: Container(child: CHILD),
),
),
ElevatedButton(),
],
),
Related
I have a layout as follows:
Widget1 is aligned to the left, Widget2 and the text widget - to the right.
How can I wrap the text with an ellipsis for example in case it doesn't fit into the row, as follows?
you can wrap 'Text with property...' inside ExpandedWidget.
Row(
children: [
WidgetA(),
WidgetB(),
Expanded(
child: Text("...."),
)
],
)
add your Text widget inside Expanded
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: Text('Atras'),
),
Expanded(
child: Text('Filtros offertos'),
),
Expanded(
child: Text('title'),
),
Expanded(
child: Text('titleasdas'),
),
Expanded(
child: Text('title'),
),
Expanded(
child: Text('titlesfsfsdf'),
),
],
),
Your result screen->
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'm trying to make a widget on the very bottom of the screen (above the bottomnavbar).
I added MainAxisAlignment.spaceBetween to the column, but it seems like the Column in the SingleChildScrollView is shrinking to fit. How can I make _BottomOne all the way on the bottom?
Column(children: [
_StayOnTopWidget(),
Expanded(
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
_FirstOne(),
_BottomOne(),
],
),
),
)
]),
Expanded widget should be the parent of _BottomOne, which will take remaining space will align itself at the bottom
Column(children: [
_StayOnTopWidget(),
SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
_FirstOne(),
Expanded(
child:
_BottomOne(),
),
],
),
)
]),
I need to create the following:
I could do it with code:
Row(
children: <Widget>[
Container(
width: 30
),
Column(
children: <Widget>[
Text("label"),
Container(
width: screenSize.width - 30, // <- this is problem
child: Row(
children: <Widget>[
Expanded( child: TextField() ),
Expanded( child: TextField() ),
],
),
),
],
),
],
);
Is it possible to do it in a different way, namely the line width: screenSize.width - 30?
You can use crossAxisAlignment inside Column widget and make it Stretch to get all remaining width in screen
Row(
children: <Widget>[
Container(
width: 30
),
Column(
crossAxisAlignment: CrossAxisAlignment.stretch, // <- Add this
children: <Widget>[
Text("label"),
Container(
child: Row(
children: <Widget>[
Expanded( child: TextField() ),
Expanded( child: TextField() ),
],
),
),
],
),],);
[Please read official flutter documentation of Column widget]
Column Widget
CrossAxisAlignment
Solution
Row(
children: <Widget>[
Container(
color: Colors.red,
width: 50,
),
Expanded(
child: Column(
children: <Widget>[
Text("label"),
Expanded(
child: Row(
children: <Widget>[
Expanded(
child: TextField()
),
Expanded(
child: TextField()
),
],
),
),
],
),
),
],
);
Explanation
It is about where you place Expanded instances.
You have a row, which can fill its parent if it included an Expanded child. So we defined the size of one of its children (Container), and the other is simply Expanded. The same goes for the Column child ..
Maybe starting with a simpler example makes it easier to understand. Please refer to this useful answer.
Output
P.S. Welcome to StackOverFlow, Dmitry!
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: