I have a ListView.Builder with ListTiles and I would like the spacing to be consistent across the data fields. The way I have it setup now is by using Spacers in between each element such as this:
return ListTile(
title: Row(children: [
Text(data[0]),
Spacer(),
Text(data[1]),
Spacer(),
Text(data[2])
])
);
I'm looking for a solution that will keep the spacing responsive without the spacing being inconsistent across the ListView.builder.
You may have to set a width for the Text
final size = MediaQuery.of(context).size;
return ListTile(
title: Row(children: [
SizedBox(
width: size.width/4,
child: Text(data[0]),
)
Spacer(),
Text(data[1]),
Spacer(),
Text(data[2])
])
);
Related
I want to show a progress bar with a button on the right side as in the image below. The margin on the left and right should be visually equal. Instead, the spacing on the right is larger than on the left. This is because the IconButton I'm using adheres to material design and has a bunch of extra space around it.
My code places the progress bar in a Row. Above it I also have a label in a Row. I want the right-aligned label to be aligned to the button. What's the correct way to align taking into consideration any padding that material design might have added?
Here's what my code looks like:
return Container(
padding: 10,
child: Column(
children: [
Row(children: [Text("Left aligned text"), const Spacer(), Text("Right aligned text")]),
const SizedBox(height: 10),
Row(children: [
Expanded(
child: LinearProgressIndicator(backgroundColor: Colors.darkBlue, color: Colors.blue, value: 55, minHeight: 20)),
IconButton(
icon: Icon(Icons.stop_circle_outlined),
padding: const EdgeInsets.all(0),
)
])
],
));
I don't think there is a way to do this. I wound up just making my own version of IconButton without the padding.
I'm creating a listview widget and i want it to have varying container sizes that change from user inputs inside it, the problem is when i wrap my columns or rows in expanded widgets, the code breaks.
is there a way to set a min and max height for a list view widget?
ListView(
children: [
Column(
children: [
Row(
children: [
Expanded(
child: Container(
color: Colors.yellow,
),
),
Container(
width: 2,
color: kKillTeamOrange,
),
Expanded(
child: Container(
color: Colors.green,
),
),
],
),
],
),
],
),
I tried wrapping the listview in a constrained container but no luck, the other option would be to have the buttons set the height state but there are a lot of buttons to code that. and using expanded widgets is great for varying screen sizes.
any help would be greatly appreciated.
cheers
Two ways came to mind:
CustomScrollView
ListView (But using cards)
Both ways are responsive to screen sizes
LISTVIEW WITH CARD:
CUSTOM SCROLLVIEW:
RESULT:
hope this helps...
How can I avoid the overflowing in my text when using ExpansionTile widget? When I was not using this widget my text was not overflowing and using SingleChildScrollView was enough.
ExpansionTile(
title: Text('History'),
children: [
SingleChildScrollView(
child:Text(widget.descriptionText as String),
),
]
)
A single child scroll view can take infinite height if not bound. You can try wrapping it with a sizedBox of specific height
ExpansionTile(
title: Text('History'),
children: [
SizedBox(
height: 500,
width: MediaQuery.of(context).size width*0.7,
child: SingleChildScrollView(
child:Text(widget.descriptionText as String),
),
)
]
)
I'm trying to make a Table with two cells of the same width and height, so that the height depends on the size of the content. However, the smaller TableCell always shrinks:
This is what I'm trying to implement:
Here's the code:
Table(
children: [
TableRow(
children: [
TableCell(
child: Container(
color: Colors.green,
child: Text(
'long text long text long text long text long text long text long text'),
),
),
TableCell(
child: Container(
color: Colors.orange,
child: Text('short text'),
),
),
],
)
],
),
P.S. I could solve it by adding verticalAlignment: TableCellVerticalAlignment.fill, to the smaller cell, but any cell can be the smaller one, depending on the content. When I add this line to both cells, the whole table disappears. The only bypass I could imagine is to calculate the length of the content and find the smaller cell, but I wonder if there is a way to implement this UI directly with Flutter.
Would appreciate any help.
1. Row with IntrinsicHeight
IntrinsicHeight limits the height of the Row to the content size, which however is considered a 'relatively expensive' approach and is not recommended.
IntrinsicHeight(
child: Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Expanded(
child: Container(
color: Colors.green,
child: Text(
'long text long text long text long text long text',
))),
Expanded(
child: Container(
color: Colors.orange,
child: Text(
'short text',
))),
],
),
),
2. Table with TableCellVerticalAlignment.fill
As mentioned in the question, the .fill option must not be used in the largest TableCell, because in this case the TableRow will have zero height. This is the preferred solution, because it doesn't have the 'expensiveness' issue of the previous one.
final texts = ['long text long text long text long text long text', 'short text'];
final colors = [Colors.green, Colors.orange];
// find the longest text and its index
final max = texts.asMap().entries.reduce(
(a, b) => (a.value.length > b.value.length) ? a : b,
);
return Table(children: [
TableRow(
children: texts
.asMap()
.entries
.map((e) => TableCell(
// use .fill in all cells except the largest
verticalAlignment: (e.key != max.key)
? TableCellVerticalAlignment.fill
: TableCellVerticalAlignment.top,
child: Container(
color: colors[e.key],
child: Text(e.value),
)))
.toList(),
),
]);
I need to fix a minimum width to my Column Widgets. Inside each of them, I have Text Widgets which can be very short or very long. I need to fix a minimum width to them in order to have an acceptable size of Column even if the text is short. The other Column need obviously to adapt himself.
Row(children: [
Column(
children: [
Container(
constraints: BoxConstraints(minWidth: 80), // do not work
child: Text("short text"),
),
],
),
Column(
children: [
Container(
constraints: BoxConstraints(minWidth: 110), // do not work
child: RichText(
text: TextSpan(
text:"very very longggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg text")),
),
],
),
],
)
There's probably a dozen ways to do what you want. And likely none of them straightforward or easy to understand. (The subject of constraints & sizes is quite complicated. See this constraints page for more examples & explanations.)
Here's one potential solution.
This will set a minimum width for the blue column (based on stepWidth), but will expand/grow if the text (child) inside wants to.
The yellow column will resize to accommodate the blue column.
class ExpandedRowPage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Expanded Row Page'),
),
body: SafeArea(
child: Center(
child: Row(
children: [
IntrinsicWidth(
stepWidth: 100,
// BLUE Column
child: Container(
color: Colors.lightBlueAccent,
child: Column(
children: [
//Text('Short'),
Text('shrt')
],
)
),
),
// YELLOW Column
Flexible(
child: Container(
alignment: Alignment.center,
color: Colors.yellow,
child: Column(
children: [
Text('Very lonnnnnnnnnnnnnnnnnnnnnnnnnnnng texttttttttttttt'),
],
)
),
)
],
)
),
),
);
}
}
You could do the above without a Flexible yellow column, but a very long text child would cause an Overflow warning without a Flexible or Expanded wrapping widget.
A Row widget by itself has an infinite width constraint. So if a child wants to be bigger than screen width, it can, and will cause an overflow. (Try removing Flexible above and rebuild to see.)
Flexible and Expanded, used only inside Row & Column (or Flex, their superclass), checks screen width and other widgets inside a Row, and provides its children with a defined constraint size instead of infinite. Children (inside Flexible/Expanded) can now look up to parent for a constraint and size themselves accordingly.
A Text widget for example, will wrap its text when it's too wide for constraints given by Flexible/Expanded.
use FittedBox();
suppose Example:
Row(
children: [
Column(
children: [
Container(
constraints: BoxConstraints(minWidth: 80), // do not work
child: Text("short text"),
),
],
),
Column(
children: [
Container(
constraints: BoxConstraints(minWidth: 110), // do not work
child:
FittedBox(
child: RichText(
text: TextSpan(
text:
"very very longggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg text")),
),
),
],
),
],
);