Stack Overflow
Stack Overflow

Questions tagged [flutter-key]

7 questions
1
vote
0 answers

Flutter: push a new page and scroll down to certain widget

I have a web app in Flutter. My app bar has 5 buttons. Four of them scroll within the first page. The 5th one pushes a new page. There are three different widgets on stage: page A (HomeView) page B (ContactView) the AppBar When the user is on…
JAgüero
  • 403
  • 1
  • 4
  • 14
0
votes
3 answers

FormKey makes error 'Null check operator used on a null value'

This is a block of flutter code to generate qr code using textformfield and a elevatedbutton, validation keeps failing and gives error 'Null check operator used on a null value'. I'm using a formKey to check whether it's valid to submit or not. How…
lightmanz
  • 1
0
votes
0 answers

Flutter - Changing Padding's padding value giving it's child widget a duplicate GlobalKey error

I think this question is not about PageView, only in my case. I have a PageView wrapped with a Padding like below. Padding( padding : EdgeInsets.symmetric(horizontal : padding), child : PageView.builder(...) ) Each PageView's item has a…
stackunderflow
  • 1,492
  • 1
  • 23
  • 53
0
votes
2 answers

Is there a way to use the same globalkey in multiple widgets?? in flutter

So I'm relatively new to flutter and I've been trying to dynamically add Sections(TextFormFields) that are represented in a form that has Form.Helper as its child and in the process to get the saveAndValidate method to work i had to use a GlobalKey…
Sam Kh
  • 3
  • 1
0
votes
0 answers

Proper use of Flutter globalKey getting null value on currentState

I am following along a youtube video to use the plugin CurvedNavigationBar here: https://www.youtube.com/watch?v=TX2x41h47fE In the video around 3:30 time in video he shows how to use globalkey to dynamically change the tab and page. The problem I…
Technorocker
  • 103
  • 14
0
votes
1 answer

Flutter Question: How to select/highlight widget based on widget key or unique key properties upon tap

Im trying to build dynamically generated widgets, each of them need to be selected/highlighted when I tap on them. here is code borrowed by another solution on stackoverflow, reference code below is DartPad friendly to paste and play. this is…
Shreyz
  • 99
  • 1
  • 10
0
votes
1 answer

How could I use ReorderableListView when displaying a list of potentially identical items?

The ReorderableListView widget requires all children to have a unique Key. I wish to display a reorderable list of plugins in use in my application. One feature of this application's design is that the same plugin can be added to the plugin list in…
hacker1024
  • 3,186
  • 1
  • 11
  • 31