Null Ref Exception occurs when calling ScrollItemIntoView at the time when navigating away from the page. 

Our error reporting is getting multiple of these crashes:

When collapsing all groups, the footer still keeps bottom position and does not align with the groups. 

In RadListView, the footer is aligned to the groups when they are collapsed. Please provide such option for the CollectionView. 

Provide a built it way to notify the parent group when the items in the nested groups are changed. 

For example, there is no PropertyChanged or CollectionChanged notification that we can hook in to in order to detect updates in parent group headers when the count changes in a subgroup. Only the leaf group headers get updated, but not the parents.

 

Steps to Reproduce

1. Create a RadCollectionView with an ObservableCollection<ButtonModel> as the ItemsSource.

2. Use a DataTemplate inside RadCollectionView.ItemTemplate to display buttons.

3. Bind button properties (IsOddClick, IsEvenClick) that should change on click.

4. Click the button inside the RadCollectionView and observe that:

5. The text updates correctly, but part of it is cut off. It seems the text does not expand 

1. Bind the CheckedItems collection of the TreeView to the CollectionView ItemsSource.

2. there aren't any items in the TreeView initially.  Add items to it

3. Start checking the checkboxes

4. The items are added to the CollectionView, still they are not visible in the control.

 

When removing items from the collection's item source, the group header item count does not update real time. It only updates when the GroupContext is collapsed or expanded. This would also be an issue if items are added dynamically.

The content inside the swipe template is missing when using MAUI 9.0.40 and Telerik MAUI 10.0.0

Workaround:

Use MAUI 9.0.30 and Telerik MAUI 10.0.0

There is a memory leak in the CollectionView on iOS/MacCatalyst - when the CollectionView control is on the page, the page does not dispose when GC runs. Same behavior happens with the RadListview.

Provide support for right-to-left flow direction: 

The current behavior is that the items

when the device language is set to an RTL language (like Hebrew or Arabic) causing the FlowDirection to be set to RightToLeft, where UI will show correctly with RTL FlowDirection, but the item's corresponding tap areas are still in the LTR positions. 

Setting the ItemViewStyle to have a Margin of any value greater than zero makes the items height to increase continuously when scrolling. 

Provide keyboard navigation support for CollectionView

I observe scrolling issues in the CollectionView on iOS when using Maui 9.0.30 version. 
For example the control has 25 items, I can scroll only to the first 10-11, cannot see the rest of the items.

programmatically cause a list item template to swipe itself

CollectionView item swipe doesn't work.

When UseWindowSoftInputModeAdjust to Resize and keyboard closes, the CollectionView does not scroll.

Having a RadExpander inside the ItemTemplate breaks the Drag and Drop gesture of the RadCollectionView. 

When Using MAUI CollectionView and RadExpander in the template, drag and drop works.

The RadListView Delegate sort, filter and group descriptors have bindable properties, for example: Func<object, object) KeyExtractor, Filter.
The RadCollectionView delegate descriptors use KeyLookup, Filter which type is interface and do not expose bindable properties.

the option is to implement an interface

When scrolling to the last item using the ScrollITemIntoVIew() method to show the last item of a CollectionView, It doesn't scroll to the end of the list and only show the first pixels of the last item.

When having swipe and tap gestures and building on Samsung device with android 13 the swipe gesture is with higher priority. the sensitivity of swipe is very high, resulting in not recognizing the tap.