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Questions tagged [statelesswidget]

121 questions
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Custom Flutter widget to return two widgets for use with CustomScrollView / slivers

I have a Flutter CustomScrollView with the following structure: body: CustomScrollView( slivers: [ MyCustomTitle(...), MyCustomSliverGrid(...) MyCustomTitle(...), MyCustomSliverGrid(...) MyCustomTitle(...), …
TechAurelian
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Why would I ever use StatelessWidget over StatefulWidget?

I know that StatefulWidget allows us to change widgets, while StatelessWidget does not. But if StatefulWidget can perform everything that StatelessWidget can perform + more, why would I ever use StatelessWidget over StatefulWidget? Is…
Yousef Gamal
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Flutter: Mutable fields in stateless widgets

The class StatelessWidget is marked as immutable. However, I am using the scoped model, which means that I avoid StatefulWidget and use the model to alter state in StatelessWidget. This leads to me having non-final fields in StatelessWidget, which…
footurist
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I use Stateless Widget alongside BLoC almost everytime. Am I wrong?

I am having a hard time understanding how to deal with states in some specific situations with Flutter. For example, say I need a page where the click of a button fetches data from an API. Such a request could take time or any kind of problems could…
Myrmillion
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What's the use of Stateless Widget if one can directly return a widget

This might be an odd question but I'm wondering what's the actual use of stateless widget if one can simply return a widget? Stateful widgets on the other hand are useful for handling states because of setState method. Are stateless widget only…
cattarantadoughan
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Flutter StatelessWidget and Provider not updating or calling build unnecessarily

I'm trying to use Provider with a Stateless widget page to update a countdown UI. When I run all the below, I get both print messages in the console on each 1 second tick of the stopwatch: e.g. flutter: build() flutter: _buildCountDown() Also, the…
Dave
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stateless Widget Keeps Rebuilding

I'M currently working on a to-do app following a tutorial this is the checkbox part I'm trying to lift it's state up the tree, but when I do so the stateless widget just keeps rebuilding non stop , I tried adding key , adding const converting it to…
abdalla mohamed
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Is it possible to use "formKey.currentState" inside a stateless widget with GetX?

I am trying to convert a code that uses provider package and stateful widget to use GetX package and stateless widget. One problem I do have is that I have a form that changes(from login to signup and vice versa) using animation, but when I check…
Hasani
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What is the alternative for "initState()` while we using "GetX" and "statelessWidget"?

I have the following code that is inside a statefullWidget, and I want to change the statefullWidget to a statelessWidget and use GetXCintroller instead. AnimationController? _controller; Animation? _slideAnimation; Animation?…
Hasani
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ChangeNotifier wrap class around each instance of a model

I have an application where I display a list of cards that represent a model (Let's say a Person). These are stateless widgets as they cannot be changed directly. These instances are obtained from an API and, since the amount of items is large, I am…
Dpac99
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How to use setState() function inside statelessWidget class

I can't use setState function inside dialogContent and I got this error : The method 'setState' isn't defined for the class 'CustomDialog' and here I used setState() Row( mainAxisAlignment: MainAxisAlignment.center, …
Laila Mattar
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Since a ListView in Flutter is stateless, how come it can be changed?

This is more of a philosophical question, I think, and the title pretty much says it all. It seems like a contradiction, that a ListView derives from stateless, and yet can be changed while the app is running.
Michael Rogers
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5 answers

Flutter call setState() to update UI in another class

I am trying to call a setState when a button is pressed so the ui can show the new list but even using functions i cant use setState or it will give me the error saying im calling setState inside a constructor. This is my code for the…
André Sousa
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Choosing StatelessWidget or StatefulWidget for sub-widget which has TextEditingController as a child

I'm working on a refactored code to separated small piece of widgets. There's several columns with TextFields in each one of them.I have two options to complete the task : Choosing StatelessWidget since it have more performance, may put…
JerryZhou
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How to initialize final member with other final member in StatelessWidget subclass?

I have a simple StatelessWidget that creates a new StatefulWidget in its constructor. The problem is that to create that widget, another object needs to be created first. And then when I pass it to the constructor, I get the error error: Only…
UglyBob
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