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

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.

 

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. 

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.

Our error reporting is getting multiple of these crashes:

programmatically cause a list item template to swipe itself

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.

 

CollectionView item swipe doesn't work.

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 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

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

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.

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.

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

The ItemsSource of the views is populated in the ViewModel of the page. This is done in a command that is triggered by the NavigatedTo event of the page, which is forwarded via EventToCommandBehavior from the Maui Toolkit.

When using the RadCollectionView the loaded items are no longer displayed. 

When the ObservableCollection of the items is completely reconstructed and reassigned the display works.

See simple example baaaaif/CollectionViewFilterIssue (MainPage.xaml.cs) to reproduce, click hide and show

When items are filtered through a FilterDescriptor they are hidden - correct
Trying to show the previously hidden items they don't appear again as expected - bug

I've used a BooleanFilterDescriptor and a DelegateFilterDescriptor, both don't work.

Stops me from using the RadCollectionView control