I am trying to get the layout as in the gif below but could not get any resource to continue with. There are two rows with multiple columns and is scrollable. How can I achieve such layout?
As your question says, you follow this approach, and it is not containing multiple columns, items are having different width. This snippet will work fine.
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Column(
children: [
Row(
key: const ValueKey("row1"),
children: _items(),
),
Row(
key: const ValueKey("row2"),
children: _items(),
),
],
),
),
You can achieve this by SingleChildScrolView widget with axis : horizontal and that listitem will be created using FilterChip widget.
like this :
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Wrap(
spacing: 10.0,
runSpacing: 5.0,
children: [...generateTags()],
),
),
generateTags(){
return _keywords.map((e) => FilterChip(label : e)).toList();
}
var _keywords =["hello" , "hi" ,"words 1" , "word 2"];
Related
Can anyone clarify for me what I have shown in the 'image' attached is achievable in flutter? if yes, how? explaining the image is a bit hard.
I am new to flutter and trying to nest some scrollable views inside each other.
at first I tried to achieve this by nesting simple scrollable row and columns inside each other but faced some errors and exceptions (unbound height and width).
I searched and found out it is better to use 'CustomScrollView' for nesting lists in each other. tried it but haven't achieved what I want yet.
Any help/hint on how to achieve this would be much appreciated.
Nested Scroll Views
This is definitely possible, and you could use an approach like below, which is inspired by another question on stack overflow. I recommend reading that for better clarification -- here.
Edit: Wrapping the Row widget in a SingleChildScrollView would make the entire page scrollable.
body: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Expanded(
child: ListView.builder(
scrollDirection: Axis.vertical,
itemCount: X,
itemBuilder: (BuildContext context, int index) => ...
),
),
Expanded(
child: ListView.builder(
scrollDirection: Axis.vertical,
itemCount: Y,
itemBuilder: (BuildContext context, int index) => ...
),
),
],
);
If this doesn't help, I'd suggest finding flutter repositories of e.g. Netflix clones or other existing apps known to have scroll views inside a list view.
#bragi, thanks for the answer,
I followed what you suggested and after some trial and error, I finally got it working.
But in terms of efficiency and how the application will respond/render I am not sure if this was the best way to do it:
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Row(
// mainAxisSize: MainAxisSize.min,
children: [
makeColumn(),
makeColumn(),
makeColumn(),
makeColumn(),
makeColumn(),
],
),
),
Widget makeColumn() {
return Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
children: [
Container(
width: 150,
height: 150,
color: Colors.green,
),
SizedBox(
width: 150,
height: 500,
child: SingleChildScrollView(
scrollDirection: Axis.vertical,
child: Column(
children: [
Container(), ....
For some reason, the Expanded widget did not work so I had to wrap my second column with SizedBox!
return Scaffold(
body: Center(
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Container(
color: Colors.red,
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Center(
child: SelectGroupCard(context, titles: titles, ids: ids,
onTap: (title, id) {
setState(() {
cardGroupResult = title + " " + id;
});
}),
),
),
],
),
There are several cards as seen in the picture. I want to get these right out. I even want to be able to show these cards in the middle of the page, in 3 columns, 4 rows.
Use widget GridView, it allows you to select the desired number of columns and rows. Also, it is possible to install paddings.
you can use GridView
GridView(
gridDelegate:const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2, // you can change this
),
children :[...] // put your cards here !
)
you can remove the width property of SelectGroupCard. for example, if SelectGroupCard is a row widget, the following code like this:
Row(
mainAxisSize: MainAxisSize.min,
children: [],
)
I'm developing a table at Flatter.
In order to process selection/unselection for each row of the table, I would like to develop a Checkbox for the header of the table and all rows.
Then, I found the showCheckboxColumn option in the DataTable widget and applied it with pleasure.
However, as shown in the picture below, the Checkbox was not applied at all, and I can't find the cause.
The DataTable widget I designed is written like the following code:
#override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.fromLTRB(24, 34, 24, 24),
child: Scrollbar(
trackVisibility: true,
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Selected Delete',
),
SingleChildScrollView(
padding: EdgeInsets.only(top: 19),
scrollDirection: Axis.vertical,
child: DataTable(
showCheckboxColumn: true,
headingRowColor: MaterialStateProperty.all(Color(0xFFEEEEEE)),
rows: _getTableDatas(),
columns: _getTableHeaders(),
),
),
],
),
),
),
);
}
Is there any part of this code that I'm wrong about or I'm wrong about the concept of DataTable?
According to the docs,, You need to add showCheckboxColumn property to make the row selectable. Try adding and do let me know.
I have a list of days, and a list of opening hours for each day.
I need to make the list of days scrollable, and the list of opening hours expands as necessary (= I don't want the list of opening hours to be scrollable into a defined height container).
How to make the list scrollable ?
Here is what I have so far, a list of days that is not scrollable (and I can't see sunday) :
SingleChildScrollView(
child: ListView.builder(
itemCount: _days.length,
itemBuilder: (context, i) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: EdgeInsets.all(18.0),
child: Text(_days[i],
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.grey[700]))),
Container(
decoration: BoxDecoration(color: Colors.white),
child: ListView.builder(
shrinkWrap: true,
itemCount: _daysDispos[i].length,
itemBuilder: (context, j) {
final dispo = _daysDispos[i][j];
return ListTile(
title: Text(dispo.address.line));
}),
)
],
);
})),
EDIT
In the first listView builder, add :
physics: NeverScrollableScrollPhysics()
Solved my issue.
A good solution would be using Expandable package, and add multiple Expandables inside a single ListView.
Another Solution would be replacing the outer ScrollView with one single ListView, whose Childs will be 7 Columns, each column contains a group of opening hours.
You can try CustomScrollView with multiple SliverLists for your purposes instead of using SingleChildScrollView:
Widget build(BuildContext context) {
return CustomScrollView(
slivers: <Widget>[
SliverList(
delegate: SliverChildListDelegate([
Column(
children: <Widget>[
//Widgets you want to use
],
),
]),
),
SliverList(
delegate: SliverChildListDelegate([
Column(
children: <Widget>[
//Widgets you want to use
],
),
]),
),
],
);
}
I have a problem with gridview and column. In this case, i want put an image in upper of gridview. Please give me a solution..
return new Container(
child: new Column(
children: <Widget>[
new Container(
child: new Image.asset(
"assets/promo.png",
fit: BoxFit.cover,
),
),
new Container(
child: new GridView.count(
crossAxisCount: 2,
childAspectRatio: (itemWidth / itemHeight),
controller: new ScrollController(keepScrollOffset: false),
shrinkWrap: true,
scrollDirection: Axis.vertical,
children: new List<Widget>.generate(16, (index) {
return new GridTile(
header: new Container(
padding: const EdgeInsets.all(10.0),
alignment: Alignment.centerRight,
child: new Icon(
Icons.shopping_cart,
size: 20.0,
color: Colors.red,
),
),
child: new MyList(
nomor: '$index',
));
}),
),
),
],
),
);
and this is the result:
Flutter Gridview in Column
You just need to put your grid view into Expanded widget, for example:
body: new Column(
children: <Widget>[
new Expanded(
child: GridView.count(
// Create a grid with 2 columns. If you change the scrollDirection to
// horizontal, this would produce 2 rows.
crossAxisCount: 2,
// Generate 100 Widgets that display their index in the List
children: List.generate(10, (index) {
return _buildCard(index);
}),
),
),
new Text("text")
],
),
Reason for the error:
Column expands to the maximum size in main axis direction (vertical axis), and so does the GridView (scroll direction is vertical by default)
Solution
You need to constrain the height of the GridView, so that it expands to fill the remaining space inside Column, there are several ways of solving this issue, use whichever suits you better.
If you want to allow GridView to take up all remaining space inside Column use Flexible.
Column(
children: <Widget>[
Flexible(
child: GridView(...),
)
],
)
If you want to limit your GridView to certain height, you can use SizedBox.
Column(
children: <Widget>[
SizedBox(
height: 200, // constrain height
child: GridView(...),
)
],
)
If your GridView is small, you may try shrinkWrap property on it.
Column(
children: <Widget>[
GridView(
shrinkWrap: true, // use it
)
],
)
If Column is the parent of GridView then it will give rendering issue as
It happens because Column and GridView both take the entire space of the screen individually which is there default behavior(Default axis of scrolling is Vertical).
Solution:
To solve the above problem we have to disable scrolling of GridView, This can be possible by shrinkWrap and physics property
shrinkWrap:true - With this GridView only occupies the space it needs
physics: NeverScrollableScrollPhysics() - It disables scrolling functionality of GridView, which means now we have only SingleChildScrollView who provide the scrolling functionality.
Code:
SingleChildScrollView
Column
GridView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
//...
)
The answer mentioned by #RuslanLeshchenko is correct but if it is still not working for you, trying the following properties on GridView
Try changing shrinkwrap to true
Apply physics: BouncingScrollPhysics()
Inside your Gridview make sure to add this 2 properties.
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
Just wrap with scaffold and scrollview
Scaffold(
resizeToAvoidBottomInset: true,
body: SingleChildScrollView(
child: Column(
children: [
...
Tested working on dialog model aswell.
I had the same problem and couldn't fix.
Then again I used a GridView.builder().
I changed it to GridView.count and added shrinkWrap: true and physics: NeverScrollableScrollPhysics() as mentioned in the other comments.
It works fine now. Thanks!
You can solve it by these two properties and change them as follows :
shrinkWrap: true,
primary: false,
shrinkWrap will wrap your and will handle overflow.
Through primary we can set either you want to make this list scrollable or it's parent list. By setting it to false it allows to take scroll of parent list or scrollable view.
NOTE : You can also wrap your column with SingleChildScrollView to have scroll in your view.
Happy Fluttering !
Try changing childAspectRatio property of GridView to 0.8 or lower.
body:Container(
body: Container(
child: Column(
children: [
Text('Exemple'),
Expanded(
child: GridView.count(
children: <Widget>[
//Widgets
]
)
)
]
)
)
Just wrap GridView inside ListView
Column(
children: <Widget>[
ListView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
children: [
GridView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
),
],
),
)
Also it works with SingleChildScrollView
SingleChildScrollView(
child: Column(
children: <Widget>[
ListView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
children: [
GridView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
),
],
),
)
)
Works like a charm (: