cl_column_tree_model editable textitem possible?

The item_set_editable method of cl_column_tree_model seems to allow setting 'X' to editable property of items only to checkboxes, but I want to edit text inline in the table or even the node text itself.

Is can I achive this behavior somehow in ABAP without switching completely to an other tree class and changing a lot of my code? maybe by overwriting the editing methods or so?

My only idea is to show a popup to the user allowning him to alter text and set the text back to the tree item after popup is closed, but thats an ugly workaround. Is there any ellegant solution for this?