Touch_plate in QrDragon doesn't function as described

Hi i have for a while been trying to find the routine that the Touch_plate buton in QtDragon uses to no avail.I have found one in macros of probe and an other in basic probe.Both of them are described has moving towear surface then backing up 1mm and touching the srface slower. When i use it the surface is only touched once and the Zero is set in aboslute.Also the zero is highre then the touch plate dimension.
Any one knows where is the correct path for the routine?

Are you talking about QtDragon which is included with linuxcnc?
If so that uses qtvcp not QtPyVCP - so wrong category.

What version of linuxcnc are you using?

Yes i am. Thank you.

Moved to QtVCP 

in 2.8 the touchoff code is in the handler file:
github.com/LinuxCNC/linuxcnc/blob/2.8/sh...agon_handler.py#L723

I am trying to locate thr handler.py file but can't find it.