[Tex/LaTex] scrlttr2 – how to add the fromrule into custom-made firsthead

Question

Starting point should be this simple minimum example with the fromrule below the senders name and the senders personal data aligned to the right hand side:

\documentclass{scrlttr2}

\KOMAoptions { fromalign=right,
               fromrule=aftername }

\usepackage[english, ngerman]{babel}

\begin{document}

    \setkomavar{fromname}    {John Doe (sender)}
    \setkomavar{fromaddress} {25th Doe's Avenue \\ 54321 Springfield}

\begin{letter}  { Maria Lae\\
                  2th Coast Road\\
                  12345 Milltown }

        \opening{Dear Maria,}

            Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam
            nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam
            erat, sed diam voluptua.

        \closing{Sincerely yours}

\end{letter}

\end{document}

Unfortunately, both the fromrule and the set alignment disappear by use of a custom-made firsthead despite of performed activation by setting fromrule=aftername and fromalign=right in the preamble.

The only way to preserve fromrule and alignment is to remove the custom-made firsthead out of the source code.

How can I add the fromrule into a custom firsthead, for example inside this self made exemplary firsthead-code like the following:

\setkomavar{firsthead} {%
             {\usekomafont{fromname}\strut\ignorespaces\usekomavar{fromname}} \\
             {\usekomafont{fromaddress}\strut\ignorespaces\usekomavar{fromaddress}}
            }

Of course, I also could easily add an ordinary line by inserting…

\rule{\textwidth}{.5pt}

… at the final desired position (below the senders name) …

\setkomavar{firsthead} {%
             {\usekomafont{fromname}\strut\ignorespaces\usekomavar{fromname}} \\
             \rule{\textwidth}{.5pt}
             {\usekomafont{fromaddress}\strut\ignorespaces\usekomavar{fromaddress}}
            }

… , but ordinary lines use completely different spaces and distances to the text than the fromrule. That's the reason why I want to continue to to use the fromrule instead of an ordinary one…

Do you have any ideas? Thank you very much for your help!

Answer 1

It is not possible to use the fromrule option together with firsthead. But here is an suggestion how you can get the same line as in your MWE:

\documentclass{scrlttr2}
%\KOMAoptions { fromalign=right,
               %fromrule=aftername }

\setkomavar{firsthead}{%
  \parbox{\textwidth}{
  \raggedleft
  {\usekomafont{fromname}\strut\ignorespaces\usekomavar{fromname}} \\[-.5\baselineskip]
  {\usekomafont{fromrule}\rule{\textwidth}{\useplength{fromrulethickness}}}\\
  {\usekomafont{fromaddress}\strut\ignorespaces\usekomavar{fromaddress}}
  }}

\usepackage[english, ngerman]{babel}

\begin{document}

\setkomavar{fromname}    {John Doe (sender)}
\setkomavar{fromaddress} {25th Doe's Avenue \\ 54321 Springfield}

\begin{letter}{Maria Lae\\
               2th Coast Road\\
               12345 Milltown}

  \opening{Dear Maria,}

  Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam
  nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam
  erat, sed diam voluptua.

  \closing{Sincerely yours}
\end{letter}
\end{document}