DataGridColumn and DataGridColumnHeader accordance

[ds1709]

I'm trying to implement behavior that will add filtering button to DataGridColumnHeader with popup list to select displayed items. I want to implement populating this list automatically depending on DataGridColumn.Binding property. The problem is that I can't access DataGridColumnHeader from DataGridColumn and back because it's DataGrid internal logic. Is there any way to get DataGridColumn and its DataGridColumnHeader?

[Algorithman]

I'm working at the moment on a filter row, but it's not done yet, maybe in a few weeks, it's just a fun project for me at the moment.
But you're welcome to take a look at it. (https://github.com/Algorithman/Avalonia.Controls.DataGrid/tree/filterrow1)
Missing parts: Filtering enums, bool and such things, at the moment it's only string search.
Later on I want to utilize the template of the cells for display (like flags for a country selector for example).

As for access to the access to the header:
DataGridColumn has the HeaderCell property (which is the DataGridColumnHeader), this should help.

[ds1709]

The idea is to implement filters over existing DataGrid control without changing its original code. AFAIK, HeaderCell is internal property, so I can't use it. Even via reflection, too earlier call of this property can break columns header. Currently we achieved this by implementing PopupButton with filter panel and putting it into header of every column supports filtering. Filters works over CollectionView, so it can be fully implemented on view level.

[Algorithman]

Yes, you're right, not reachable from "outside".
I for my part, I like to automate things.
Throw data at it! It has to work! 😄