[Request] Configurable Indentation on TreeDataGrid #201

The indentation can be visually disruptive in many contexts. We have tried to work around it but it breaks virtualization when we have done so.

Is there anyway to make the indentation a configurable property? Ideally, this could be configured per level but I would even accept, as a start, a single indentation that applies to all levels multiplied by their current level.

I do see some similar tickets and related workarounds we are going to try next.

• Make indentation configurable Avalonia.Controls.TreeDataGrid#343
• Is there a simple way to customize TreeViewItemIndent? Avalonia#18157 (comment)

It does seem generally valuable for this to be a properly supported capability either through documentation, if the workaround described is suitable, or via API.

Thanks!