[Lazarus] Code Explorer synchronized with caret position

[theo]

Thanks Mattias

>>/ Am I right, that the prerequisites for this feature are already there?
/
>Yes.


Hmm, I thought it would be relatively easy.
I don't know anything about code explorer, but tried this:

In CodeExplorer.pas:

To get some event, I started here:
procedure TCodeExplorerView.Refresh(OnlyVisible: boolean);

There I'm calling "SelectSourceEditorNode" which looks as if it would do 
what I intend.
Btw. This method is never called throughout the Project afaics.

This one is calling "SelectCodePosition" which is calling 
"FindCodeTVNodeAtCleanPos"

It passes all checks, but in the last method, this code:
  AVLNode:=fCodeSortedForStartPos.FindLeftMostKey(@KeyPos,
                            
TListSortCompare(@CompareStartPosWithViewNodeData));

returns always nil for AVLNode.

Thank you for any comment.

Best regards
Theo