Gdtyjr

This is an addendum of a previous question: How to put a box and use columns to separate arrows.

Please consider this MWE (adapted from a nice answer of that question):

documentclassarticle
usepackage[margin=0in,footskip=0in]geometry
usepackage[english]babel
usepackage[utf8]inputenc
usepackage[T1]fontenc
usepackagehyperref
usepackage[tikz]ocgx2
usepackageamssymb % checkmark 
% check box command for layer switching 
newcommandlayerCheckBox[3]% 
 % #1: switch id, if empty use #2 instead 
 % #2: layer ids to be toggled (space separated if multiple ids), 
 % #3: initial visibility 
 resizebox2ex!%
 ooalign% 
 switchocg#1 #2$square$cr% 
 beginocg% 
 ifxnil#1nil#2else#1fi% 
 %
 % 
 ifxnil#1nil#2else#1fi% 
 #3$checkmark$%
 endocg% 
 %
 % 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 

usepackagetikz
usetikzlibrarypositioning,fit,calc
pgfdeclarelayerbehind
pgfdeclarelayerbackground
pgfdeclarelayerforeground
pgfsetlayersbehind,background,main,foreground
tikzset
text field/.style=text height=1.5ex,align=center,rounded corners,
nonfillable title field/.style=text height=2ex,text depth=0.3em,anchor=south,text 
width=5cm,align=center,font=footnotesizesffamily,
pics/nonfillable subject/.style=code=- (-Title.south west)
,
 manoooh/.style=column sep=-1.75cm,row sep=5mm,
 fit sep/.initial=4pt, % change width of node (big rectangle shape)
 fit dist/.initial=40pt, % change node distance (big rectangle shape)
 inlay top sep/.initial=24pt,
 matrix top sep/.initial=24pt,
 manoooh curve/.style=to path=let p1=($(tikztotarget)-(tikztostart)$) 
 in (tikztostart) .. controls ($(tikztostart)+(#1*x1,0)$)
 and ($(tikztotarget)+(-#1*x1,0)$) .. (tikztotarget),
 manoooh curve/.default=0.3,
 along node/.style=insert path=
 to[out=0,in=180]
 ([yshift=5pt]#1-Title.north west) -- ([yshift=5pt]#1-Title.north east)
 % From https://tex.stackexchange.com/a/478723/152550

makeatletter% from https://tex.stackexchange.com/a/85531/121799
longdefifnodedefined#1#2#3%
 @ifundefinedpgf@sh@ns@#1#3#2%

makeatother

%%%%%%%%%%%%%%%%%%%%%%%%%
newcommandtotalnodes1 % Define the total of subjects that need arrows-1
%%%%%%%%%%%%%%%%%%%%%%%%%

begindocument

ifdefinedmymatbottom
else
typeoutPleasespace recompilespace yourspace file!
defmymatbottom-150pt
fi
ifdefinedmyheight
else
defmyheight0
typeoutPleasespace recompilespace yourspace file!
fi
ifdefinedLstMatYShifts
else
defLstMatYShifts0pt,0pt,0pt,0pt,0pt,0pt,0pt
fi
ifdefinedLstMatXShifts
else
defLstMatXShifts0pt,0pt,0pt,0pt,0pt,0pt,0pt
fi

begintikzpicture
 % step 1: add the matrices, name them mat0, mat1 etc.
 beginscope[local bounding box=matrices] 
 matrix[manoooh] (mat0) at (LstMatXShifts[0],LstMatYShifts[0]) 
 pic[local bounding box=A] (0) nonfillable subject=Subject0; & &
 pic (1) nonfillable subject=Subject1; \
 & pic (2) nonfillable subject=Subject2; & \
 ;
 matrix[manoooh] (mat1) at (LstMatXShifts[1],LstMatYShifts[1]) 
 pic (3) nonfillable subject=Subject3; \
 pic (4) nonfillable subject=Subject4; \
 pic (5) nonfillable subject=Subject5; \
 pic (6) nonfillable subject=Subject6; \
 pic (7) nonfillable subject=Subject7; \
 pic (8) nonfillable subject=Subject8; \
 ;
 endscope
 pgfmathsetmacrogroupwidth0
 pgfmathsetmacrolastwidth0
 foreach X in 0,...,1 %<- if you have more or less matrices, adjust 3
 ifnodedefinedmatEX
 
 % has inlay
 
 
 % no inlay
 path 
 let p1=($(matX.north east)-(matX.south west)$),
 n1=max(abs(y1)/2,mymatbottom)
 in 
 pgfextraxdefmymatbottomn1
 ifnumX=0
 pgfmathsetmacrogroupwidth0
 else 
 pgfmathsetmacrogroupwidthgroupwidth+x1/2+lastwidth/2+pgfkeysvalueof/tikz/fit dist
 fi
 xdefgroupwidthgroupwidth
 xdeflastwidthx1
 pgfmathsetmacromyheightmax(y1+pgfkeysvalueof/tikz/matrix top sep,myheight) 
 xdefmyheightmyheight
 ifnumX=0
 xdefLstMatYShifts0pt
 xdefLstMatXShifts0pt
 else
 xdefLstMatYShiftsLstMatYShifts,0pt
 xdefLstMatXShiftsLstMatXShifts,groupwidth pt
 fi; 
 % the fit parameters determine the shape of the background rectangles
 
 
 makeatletter
 immediatewrite@mainauxxdefstringmymatbottom-mymatbottomrelax
 immediatewrite@mainauxxdefstringmyheightmyheightrelax
 immediatewrite@mainauxxdefstringLstMatYShiftsLstMatYShiftsrelax
 immediatewrite@mainauxxdefstringLstMatXShiftsLstMatXShiftsrelax
 makeatother

 % From https://tex.stackexchange.com/a/480685/152550

 % now add the arrows.

 gdefLstCon%
 
 "6/1",
 "4",
 
 
 pgfmathsetmacromylstLstCon[0]
 foreach X in 0,...,totalnodes 
 beginscope[ocg=name=ArrowX,ref=myArrowX,status=visible]
 pgfmathsetmacrohuenumX*0.75*(1/totalnodes)
 definecolormycolorhsbhuenum,1,1
 pgfmathsetmacromylstLstCon[X]
 %typeoutX:mylst
 foreach Y/myalong in mylst 
 ifxmyalongY
 %typeoutX:Y,empty
 draw[-latex,mycolor,very thick] (X-Title.east) 
 to[manoooh curve] (Y-Title.west);
 else
 %typeoutX:Yspace andspace myalong
 draw[-latex,mycolor,very thick] (X-Title.east) 
 [along node/.list/.expanded=myalong]
 to[manoooh curve] (Y-Title.west);
 fi
 
 endscope
 
 %pgfmathsetmacrohuenumm2*0.75*(1/totalnodes)
 %definecolormycolor2hsbhuenumm,1,1
 %draw[-latex,mycolor2,very thick] (2-Title.east) -- ++ (3,0) to[manoooh curve=1.6] (3-Title.west);
endtikzpicture

flushleft
qquadparbox0.4linewidth%
 hypersetuppdfborder=0 0 0%
 % list of OCGs, space separated
 defocglist%
 foreach X in 0,...,totalnodes xdefocglistocglistspace myArrowX
 fbox%
 parbox12cm%
 % on/off All
 showocgocglistfboxsep=1ptfboxrule0pt1.7exon/%
 hideocgocglistfboxsep=1ptfboxrule0pt1.7exoff All\%
 % checkboxes
 foreach X in 0,...,totalnodes % 
 layerCheckBoxmyArrowXonbegintikzpicture[baseline=-1ex]%
 pgfmathsetmacrohuenumX*0.75*(1/totalnodes)%
 definecolormycolorhsbhuenum,1,1draw[-latex,mycolor,very thick] (0,0) -- (1,0);%
 endtikzpictureqquad%
 %
 
 


enddocument

It works fantastic.

Now I want to add another arrow, that goes from (2) to (3), so one would probably add

"3",

to the LstCon object (please increment the value of totalnodes by 1!), but this produces an ugly output, because it collides with "Subject1".

To fix this, I have been told that I need to create this new arrow outside the foreach loop that it is inside the tikzpicture environment. So I have deleted "3", and added the following three lines to the code:

pgfmathsetmacrohuenumm2*0.75*(1/totalnodes)
definecolormycolor2hsbhuenumm,1,1
draw[-latex,mycolor2,very thick] -- ++ (3,0) (2-Title.east) to[manoooh curve=1.6] (3-Title.west);

You only need to uncomment that lines of the given MWE to get this output:

It looks like there are no problems.

However, adding that arrow outside the foreach loop makes the checkbox of it non-clickable:

I want to make it possible to click on this new checkbox. How can we do it?

Thanks!!

P.S. Also I am getting an overfull hbox bad box message because of the parbox. Could you consider try to find out why I am getting it?