Provide a way to change sort comparer when grouping.

Add a mechanism to change the fill/foreground color of the funnel icon in the column header. The funnel is a FilteringDropDown element and currently the fill of the icon is hardcoded. 

Add an extra property in the FilteringDropDown element to control this color or sync the current setting with the theme palette (e.g. Windows11Palette), so it can be changed using the palette settings.

You are able to resize columns using the columns gripper. The corresponding group will be automatically resized. We can provide a way to resize the column groups. The columns inside the group will be automatically resized with the group.

Introduce property to set the text of the GridViewNewRow element responsible for adding new rows to the control.

Currently, the RadDataFilterView (shown when FilteringMode of RadGridView is set to FilterEditor) displays brackets around the filter criterias (descriptors). However, these brackets are added only for the filter descriptors in the first level of the hierarchy of descriptors. Add support for showing brackets for the nested filter descriptors as well.

Currently the filters for the RadGridView only allows 2 filters. It would be very helpful for the default filter popout to have the option to add additional filters.

Current filter popout:

 

Filter popout with ability to add additional filters via an Add Filter button:

Competitor's GridView controls have this feature already and it would be very useful to have this feature on the RadGridView control. 

Currently, the columns allow you to customize the GridViewFooterCell element by specifying a custom Style, through the FooterCellStyle property. However, there isn't an option to apply conditional styles. We can introduce such an API.

Currently when the DistinctValuesDisplayMode is Tree the distinct values are grouped by year,month and day. Extend this functionality for the time components (hour/minute/day) of DateTime values as well. 

In a scenario with multiple GroupDescriptors (3,4,5 or more) - data operations like sorting a group, sorting a column or filtering can be slower when the RadGridView is populated with a large amount of data. 

Introduce a way to set the modifier key used for multi-column sorting.

Add a separator element under the last pinned row, similar to the frozen columns splitter. The visual could be e horizontal line shown at the bottom border of the row.

Currently, the DistinctValuesDisplayMode="Tree" property of the columns supports only values of the type of DateTime and DateTime?, which the filtering control will display in a tree-like manner.

The DateOnly and DateOnly? types are not supported, however, we can try to add such support.

We could add an option to group the dates in the FilteringControl similar to how Excel groups them.

When using Search as You Type behavior, the items will be first filtered using the keywords typed in the TextBox. We can create a way to disable this filtering.

Currently, when you cancel the Filtering event the field filter (displayed when FilteringMode="FilterRow") will clear any entered text and the funnel icon won't change its color (like when the filter is active). Add an option in the Filtering event, similar to the Sorting event which allows you to manually set the sorting state of the column which will affect the UI (showing and changing the sort indicator icon).

In the case with the Filtering event, there should be an option if the funnel icon should be highlighted. In other words the setting should allow you to manually say if the filter is active or not. Also, the input text in the field filter should be preserved and possible an option to change this value may be added in the event arguments. This will allow you to implement custom filtering and keep the UI state of the field filter.

Provide option to set if the grouping is case-sensitive

Currently, you can navigate through the items in the distinct values list using the arrow keys. This changes the focused item. If you want to check/uncheck the currently focused item you need to press Tab in order to move the focus from the content presenter of the ListBoxItem to the CheckBox control.

Allow check/uncheck of the currently focused item using the keyboard (by pressing the Enter or Space key).

Add keyboard support for the filtering, grouping and sorting features of RadGridView. The keyboard action should start the corresponding action for the column of the current cell. Keyboard actions should be included also for navigation in the UI of the FilteringControl after it gets opened.

Allow setting the group header rows height with a property similar to the RowHeight property of RadGridView. For example, a new GroupHeaderRowHeight property can be introduced. The new property should be included also in the UI virtualization calculations. 

Blind users or users with visual impairments can only hear the unlocalized (english) text in the RadGridView Filter when using ScreenReaders.