Questions tagged [statelesswidget]
121 questions
1
vote
1 answer
Flutter Stateless Widget initialize values by keeping the constructor as "const"
I want to map a List of Strings to a List of DropdownMenuItems in the Widget constructor. The parent widget passes a List of Strings to the child widget. The child widget must map this List of Strings to a List of DropdownMenuItems. I want to do…
Gipfeli
- 197
- 3
- 8
1
vote
1 answer
StatelessWidget gets rebuilt even though parameters stay the same; notifyListeners() with ChangeNotifier
I've got two StatelessWidgets, one is a child of another. There is also a progress update function which updates the state in the external TransferState.
Once updateProgress function is being called the TransferIndicator widget gets rebuilt…
Tom Raganowicz
- 2,169
- 5
- 27
- 41
1
vote
0 answers
draggableScrollableController not attached to a sheet after it has been attached
I'm trying to use a DraggableScrollableSheet inside a BlocBuilder so that when I navigate to a page I can do something like this:
cubit.draggableScrollableController.animateTo(
.5, // or 1.0
duration: Duration(seconds: 10),
curve:…
MetaStack
- 3,266
- 4
- 30
- 67
1
vote
1 answer
Is this code writing method recommended in Flutter?
I installed Awesome Flutter Snippets and Flutter Snippets extension in VS Code. When I install these two extensions, I can use some keyboard shortcuts to generate widgets.
When I type statelessW or stless in the code and hit enter, it generates…
My Car
- 4,198
- 5
- 17
- 50
1
vote
1 answer
How to interact with a child Stateful Widget from a parent Stateless Widget?
Context :
Say I have a custom DisplayElapsedTime Widget which is Stateful and holds a Text Widget. With a Timer, every 1sec, the text value is updated with the current elapsed time given by a Stopwatch.
And now, say I have a page which is Stateless…
Myrmillion
- 78
- 6
1
vote
1 answer
Class and Stateless Widget
First of all I would like to say that I am new to Flutter.
I don't understand the difference between class and stateless widget. I understand why I'm using stateful , because of setState. but why should I use statless instead of just class ?
aycha
- 59
- 1
- 9
1
vote
1 answer
what is the difference between creating widget using widget class, and creating class widget that extend statelessWidget?
so i have this code:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
…
dx dx
- 43
- 1
- 4
1
vote
0 answers
Flutter clean architecture with Bloc, RxDart and StreamBuilder, Stateless vs Stateful and dispose
I'm trying to implement a clean architecture with no dependency of the framework in the business' logic layers.
The following example is a Screen with only a Text. I make an API Rest call in the repository and add the response to a BehaviorSubject…
Gilgamesh
- 197
- 2
- 13
1
vote
2 answers
Flutter: How to call a function before onChanged Method from TextFormField gets called?
I have a reusable TextFormField Widget for decimal number inputs. If the user input a decimal number with a comma instead of a dot I want to replace it. So for that I created a reusable TextFormField Widget where I want to replace the comma with a…
Dalon
- 566
- 8
- 26
1
vote
1 answer
Child Property in Stateful Widget
I've made some test widgets to illustrate a point that I'm having difficulty with in a much more complicated widget.
I have the following widget:
class TestListWidget extends StatefulWidget {
Widget child;
TestListWidget({Widget child}) {
…
Hans Donkersloot
- 123
- 5
1
vote
0 answers
How to define variables in a stateless widget in flutter
I want to pass a variable from a statelesswidget to a stateful widget. But when I do so, i have to remove the const from the constructor of GameScreen. Which is generally not advised and will make the statelesswidget equivalent to a stateful widget…
Joel
- 239
- 3
- 21
1
vote
1 answer
How to pass data to stateless widget calling from another stateless widget?
I am trying to pass some color info from one widget to another but I am not able to get that color in destination widget. I wanted to build a single class with some UI code in it and just call this class in my main widget so that I don't have to…
Abdullah
- 123
- 1
- 1
- 11
1
vote
3 answers
How to click the button in flutter to change the background image
I am a beginner in flutter, I don’t understand the concept of Widget very well.
I want to set the background image as an unsplash random image, but I want to add a button to request a random image again when I click it, but I am confused about many…
Marshall
- 47
- 5
1
vote
2 answers
Pass variable from MaterialPageRoute to custom widget
A little bit of background: Flutter noob here, trying to build an Add To Favourites function. The list of items sits in a PHP/MySQL database which I access using http on FirstScreen. When user taps on one of the list items, they get redirected to…
keymistress
- 138
- 9
1
vote
0 answers
how get variable value from this extends StatelessWidget in flutter_deep_linking-master / multi level project
I'm newbie, just how get variable value from this extends StatelessWidget in a flutter_deep_linking-master / multi level project using plugin URL launcher
how get the variable value of ${person.pdf} and insert it in String link = variable;
and put…
Patricio
- 11
- 2