Cfrgtkky

How to globally set insertion style using tikzfeynmanset?

I tried

tikzfeynmanset{

    every insertion/.style={

        /insertion/style={thick},

    },

}

but it won't work.

MWE:

This is what effect I expect:

documentclass{standalone}

usepackage{tikz-feynman}

begin{document}

begin{tikzpicture}[baseline=($(a)!0.5!(b)$)]

    begin{feynman}

        vertex (a);

        vertex[right=1cm of a] (b);

        diagram*{ (a) --[insertion={[style=thick]0.5}] (b);};

    end{feynman}

end{tikzpicture}

end{document}

and this is the code I expect without adding style=thick in every occurrence of insertion:

documentclass{standalone}

usepackage{tikz-feynman}

tikzfeynmanset{

    every insertion/.style={

        /insertion/style={thick},

    },

}

begin{document}

begin{tikzpicture}[baseline=($(a)!0.5!(b)$)]

    begin{feynman}

        vertex (a);

        vertex[right=1cm of a] (b);

        diagram*{ (a) --[insertion=0.5] (b);};

    end{feynman}

end{tikzpicture}

end{document}

and it doesn't work.

I think that there is no predefined way of doing this, but if you are willing to slightly redefine the insertion@@ style, you could do

documentclass{standalone}

usepackage{tikz-feynman}

makeatletter

tikzfeynmanset{  insertion@@/.style args={[#1]#2}{

    /tikz/decoration={

      markings,

      mark=at position #2 with {

        tikzfeynmanset{insertion/.cd,#1}

        draw [/tikzfeynman/every insertion,tikzfeynman@insertion@style] (-tikzfeynman@insertion@size, -tikzfeynman@insertion@size) -- (tikzfeynman@insertion@size, tikzfeynman@insertion@size);

        draw [/tikzfeynman/every insertion,tikzfeynman@insertion@style] (-tikzfeynman@insertion@size, tikzfeynman@insertion@size) -- (tikzfeynman@insertion@size, -tikzfeynman@insertion@size);

      },

    },

    /tikz/postaction={

      /tikz/decorate=true,

    }  

}}

makeatother    



begin{document}

tikzfeynmanset{every insertion/.style={thick,red}}

begin{tikzpicture}[baseline=($(a)!0.5!(b)$)]

    begin{feynman}

        vertex (a);

        vertex[right=1cm of a] (b);

        diagram*{ (a) --[insertion={0.5}] (b);};

    end{feynman}

end{tikzpicture}

end{document}