Cfrgtkky

Now (means 4 hours ago) I started using tikz-uml, but I got a problem. I was doing the following seguence diagram,

Using this code,

documentclass[a4paper,14pt,twoside, openright]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage[italian]{babel}

usepackage[a4paper, total={17cm, 25cm}]{geometry}

usepackage{tikz}

usepackage{tikz-uml}

usetikzlibrary{intersections}

usetikzlibrary{calc}

usetikzlibrary{shapes,arrows}

usetikzlibrary{positioning}

usepackage{xstring} 

usepackage{graphicx}

usepackage{float}

begin{document}

begin{figure}[h!]

    centering

    begin{tikzpicture}

        begin{umlseqdiag}

        umlactor [x=2] {User}

        umlobject [x=7] {Sys}

        umlsdnode [dt=6]{Sys}

        umlsdnode [dt=2]{User}

        begin{umlfragment}[type=loop, label={pagato<importo}, inner xsep=5]

           begin{umlcall}[dt=6, op={Importo (prezzo)}]{Sys}{User}

           begin{umlcall}[dt=5, op={Pago (Moneta, Banconota)}, type=return]{User}{Sys} 

           end{umlcall} 

           end{umlcall} 

        end{umlfragment}

        begin{umlcall}[dt=6, op={Resto}]{Sys}{User}

        end{umlcall}

        end{umlseqdiag}

    end{tikzpicture}

    caption{Sequenza emph{Pagamento}}

    label{fig:req1_5}

end{figure}

end{document}

But, as you can see I got the condition to cover some part of my diagram.
What option(s) should I write to make enough space for it??

I mean also putting in above the diagram, near the word loop would be fine.

Simplest fix: increase the inner xsep if the umlfragment to 15, say. This does increase the space on the right hand side as well, though.

documentclass[border=5mm]{standalone}

usepackage{tikz-uml}

usepackage[T1]{fontenc}

begin{document}

begin{tikzpicture}

        begin{umlseqdiag}

        umlactor [x=2] {User}

        umlobject [x=7] {Sys}

        umlsdnode [dt=6]{Sys}

        umlsdnode [dt=2]{User}

        begin{umlfragment}[type=loop, label={pagato<importo}, inner xsep=15] % <-- increased inner xsep to 15

          begin{umlcall}[dt=6, op={Importo (prezzo)}]{Sys}{User}

            %  begin{umlcall}[dt=5, op={Pago (Moneta, Banconota)}, type=return]{User}{Sys}

            %  end{umlcall} 

           end{umlcall} 

        end{umlfragment}

        begin{umlcall}[dt=6, op={Resto}]{Sys}{User}

        end{umlcall}

        end{umlseqdiag}

    end{tikzpicture}

end{document}

In order to move the label, you might have to edit tikz-uml.sty. I wouldn't normally recommend editing packages directly though. Another option is to copy the entire definition of the umlfragment environment to your preamble between makeatletter and makeatother, change newenvironment to renewenvironment, and make the edit there instead.

Anyways, the line in question is line 4509 of tikz-uml.sty which just has the code

at (tikzumlFragment@name-type.south west)

Change this to

at (tikzumlFragment@name-type.north east)

Having done that, you might also want to add inner ysep=2 to the umlfragment environment options, otherwise there isn't room for the label there.

Note that the nested umlcall environment for some reason caused an error when I tested on Overleaf, which is why it is commented out in the (somewhat reduced) code below. I have no idea why, if that didn't happen on your system, then I suppose there's no problem.

documentclass[border=5mm]{standalone}

usepackage{tikz-uml}

usepackage[T1]{fontenc}

begin{document}

begin{tikzpicture}

        begin{umlseqdiag}

        umlactor [x=2] {User}

        umlobject [x=7] {Sys}

        umlsdnode [dt=6]{Sys}

        umlsdnode [dt=2]{User}

        begin{umlfragment}[type=loop, label={pagato<importo}, inner xsep=5,inner ysep=2]

          begin{umlcall}[dt=6, op={Importo (prezzo)}]{Sys}{User}

            %  begin{umlcall}[dt=5, op={Pago (Moneta, Banconota)}, type=return]{User}{Sys}

            %  end{umlcall} 

           end{umlcall} 

        end{umlfragment}

        begin{umlcall}[dt=6, op={Resto}]{Sys}{User}

        end{umlcall}

        end{umlseqdiag}

    end{tikzpicture}

end{document}