I really cant seem to follow what #10 is trying to do… I there any chance you could try and put the issue into a totally separate project - it seems to have components over components (wxWidgets doesnt like overlapping components) and seems to do some other things that im just not understanding - or even understanding what you are trying to do 
Ian
PS: you might want to join the #haxe discourse too (https://discord.gg/c5QRwm) - will be easier to chat there - up to you though of course.