Retrieving information about the Editor scene

I’m trying to display debug information for my custom classes, but I with the drawdebugline / drawdebugpoint etc functions, it only works when the game is actually running, but I’d need to display it in the editor. Is there any kind of tick function I could override that gets called in the editor all the time? The only way I found to draw debug lines in the editor is in the constructor, but there I can’t retrieve the actual position of the objekt I want to place.
Has anyone any ideas?