Xamarin.forms: [Bug] IndicatorView not updating to current page when CarouselView is bound to custom DataType

[missy-bowles]

Description

I have a CarouselView which binds to a list of objects that are a local data type using a DataTemplate, and an IndicatorView sourced by the carousel. The indicator shows the correct number of pages but the current page indicator does not update as I swipe through the carousel. If the carousel is instead bound to a list of strings it does work. Occurs on Android and iOS.

Expected Behavior

IndicatorView should indicate the correct current page

Actual Behavior

IndicatorView indicates you are still on the first page while swiping through the carousel.

Basic Information

• Version with issue: Xamarin Forms 4.4.0
• Platform Target Frameworks:
  
  
  
  • iOS: 13.0
  
  
  • Android: 9.0
  
  

Reproduction Link

CarouselBugsRepro.zip

[carlosforero]

I have the same issue.

[jhf]

We have the same problem using IndicatorView - @samhouts What does the "e/4 :clock4:" label means with regards the when this issue will be looked at?
Does it mean that all of e/1 e/2 and e3 tags have priority? Or is it the order in https://github.com/xamarin/Xamarin.Forms/projects/19#card-31128636 that decides when it will be looked at?

[maxbaki]

I have same bug when binding items from modelview

<CarouselView x:Name="TheCarousel" Margin="20,20,20,0" Position="{Binding BusinessCard.BusinessCardTemplateId, Mode=TwoWay}" ItemsSource="{Binding Items}" VerticalOptions="FillAndExpand" HeightRequest="2000" HorizontalOptions="FillAndExpand" ItemTemplate="{StaticResource templateSelector}" PeekAreaInsets="20" > <CarouselView.ItemsLayout> <LinearItemsLayout Orientation="Horizontal" ItemSpacing="20" /> </CarouselView.ItemsLayout> </CarouselView> <IndicatorView IndicatorColor="{DynamicResource FormColor}" SelectedIndicatorColor="{DynamicResource GradientStartAccentColor}" IndicatorSize="10" HorizontalOptions="Center" IndicatorView.ItemsSourceBy="TheCarousel"/>

[woemike]

Any updates on this? Thank you!

[bytewin]

I have the same issue.

[samhouts]

We're working through all these blockers as quickly as we can.

the e/ tags are our estimate of effort, not priority. :)

[oveg]

Any plans on when this ticket will be moved to In Progress?

[oveg]

Any updates? Thank you.

[oveg]

Any updates? Thank you.