I have 2 rows in my screen, the first row is consist of dropdown button and elevation button and the second row is where the stream builder located, I used flexible so that the stream builder is scrollable. What I want is every time I scroll the stream builder I want the first row to follow the scroll not stay in the screen.
This is how my widget set:
Scaffold
-Column
-Row
-Dropdown button
-Elevated buton
-Flexible
-Streambuilder
-stack
-listview
Just like in facebook everytime you scroll down the "what's in your mind" controller disappers too, not floating like an app bar
Inside Listview add physics: NeverScrollableScrollPhysics()
//
Listview(
physics: NeverScrollableScrollPhysics(),
return .....;
)
//
Follow this pattern.
If you want that widget to disappear when you scroll, you need to wrap your Column in a SingleChildScrollView which you will need to wrap in a Flxible
Code:
Flexible(
child: SingleChildScrollView(
child: Column(
//your normal code insode Column
Depending on your code, you may also need to make the ListView not scroll (as suggested by Rafid):
Listview( physics: NeverScrollableScrollPhysics()
Related
I have a header widget and then a tab view. I have been able to make them scroll as one using a nestedscrollview. But I want the scrolling to not happen if tab view data is not present.
Disable scroll if total child length < scroll height:
NestedScrollView(
physics: (sumHeight>scrollHeight) ? AlwaysScrollableScrollPhysics() : NeverScrollableScrollPhysics()
)
How do I achieve an horizontal date list with scrolling functionality like the gif below in flutter?image gif
You have to use ListView with scrollDirection as Horizontal as simple as that
ex:
ListView(
scrollDirection: Axis.horizontal,
children:[
//your ui logic here
]);
I have a GridView whose parent is ListView. How can I disable scroll in GridView so users can scroll the ListView?
I can't find any attribute in GridView to disable scroll even the content is fully rendered.
I think you can disable it by setting primary property as below:
GridView.count(
shrinkWrap: true,
primary: true,
children: <Widget>[],
// ...
)
Or if you want to disable it entirely:
hysics: new NeverScrollableScrollPhysics()
I have a ScrollBar surrounding a CupertinoPageScaffold child Widget.
Inside this contains a few horizontal scrolling ListViews which should not show scrollbars but due the parent ScrollBar being present, every scrolling widget below has a scroll bar attached to it.
Is there a Widget to wrap scrolling Widgets that removes the scrollbar?
I've looked for Widgets that may be called NoScrollbar but these don't exist.
If I remove the parent ScrollBar then the scrollbars are removed
If you wrap the ListViews for which you don't want scroll bars for in a NotificationListener in the following manner:
NotificationListener<ScrollNotification>(
onNotification: (_) => true,
child: ListView(....)
)
I think those ListViews will not have scrollbars.
You can use ScrollConfiguration to hide the scrollbars.
ScrollConfiguration(
behavior: ScrollConfiguration.of(context).copyWith(scrollbars: false),
child: ListView(....)
)
You can use this with any scrollable widget.
When creating a very simple scrollable list in Flutter, what are the advantages and disadvantages of saying (where widgets is List<Widget> == true):
Option 1:
var widget = new SingleChildScrollView(
child: new Column(
chidren: widgets
));
Option 2:
var widget = new ListView(children: widgets);
ListView:
Listview Widget shows the unlimited number of children inside it, but the main advantage of using ListView is it renders only visible items on the screen perhaps more specifically I would say ListView.Builder()
Column
The column is used when we have to draw different widgets in the list. If items increase in the column then SingleChildScrollView is used for scrolling purposes.
For More Reference:
https://medium.com/flutterworld/flutter-problem-listview-vs-column-singlechildscrollview-43fdde0fa355
Definitely go for option 2.
ListView have a few cool optimisations. https://youtu.be/UUfXWzp0-DU?t=33m38s