CarouselViewHandler2 InvalidCastException for MauiMediaElement.macios.cs when using CollectionViewHandler2 and CarouselViewHandler2

[TheCodeTraveler]

Description of Change

This PR fixes a typo I made when adding support for ItemsViewController2<T> in MauiMediaElement.macios.cs.

When a developer is using an ItemsViewController2<T>, we were incorrectly casting it to ItemsViewController<T> instead of a ItemsViewController2<T>, causing the InvalidCastException.

Linked Issues

• Fixes [BUG] (MediaElement) InvalidCastException thrown when using MediaElement in CollectionViewHandler2 and CarouselViewHandler2 #2925

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Rebased on top of main at time of PR
• Changes adhere to coding standard

Additional information

The bug was due to a copy/paste error when I created the following two methods side-by-side:

• static ItemsViewController<TItemsView> GetInternalControllerForItemsView<TItemsView>(ItemsViewHandler<TItemsView>) where TItemsView : ItemsView
• static ItemsViewController2<TItemsView> GetInternalControllerForItemsView2<TItemsView>(ItemsViewHandler2<TItemsView>) where TItemsView : ItemsView

This bug was not caught earlier because the Controller we need from .NET MAUI is a protected internal property, forcing us to use reflection to retrieve it. If the property was public we could rely on C# type-safety.

[ne0rrmatrix]

Looks good. I am currently testing it. Have you thought about adding a sample to sample app to track behavior?

[TheCodeTraveler]

Have you thought about adding a sample to sample app to track behavior

That's the weird thing! CommunityToolkit.Maui.Sample is already configured to use CollectionViewHandler2 and CarouselViewHandler2:

Maui/samples/CommunityToolkit.Maui.Sample/MauiProgram.cs

Lines 78 to 81 in b0c8ca6

	#if IOS || MACCATALYST
	handlers.AddHandler<CollectionView, Microsoft.Maui.Controls.Handlers.Items2.CollectionViewHandler2>();
	handlers.AddHandler<CarouselView, Microsoft.Maui.Controls.Handlers.Items2.CarouselViewHandler2>();
	#endif

However, when I debug the sample app and load the MediaElementCollectionViewPage, the debugger shows it is still using CollectionViewHandler and not CollectionViewHandler2. I couldn't figure out why it's still using the older CollectionViewHandler instead of using the CollectionViewHandler2 that we initialized in MauiProgram.

[ne0rrmatrix]

My only suggestion at this point is to create a new page for media element that uses CarouselView that supports Mac/iOS. Currently we have a CarouselView page but it only supports Windows/Android and uses multiple itemViews which is not currently supported on Mac/iOS. If we include that I would be happy to approve this. As far as I can tell it works. I tested the PR branch on my pac in a simulator and it works.

Good catch btw. If you feel we do not need that page go ahead and merge this as it does exactly what we need it to. It works.

[TheCodeTraveler]

Thanks! I say we defer the sample app updates since you've already opened a PR to implement the fix for multiple ItemsViews: #2807