Add option to add signature

cel-thesis.cls

@@ -34,6 +34,8 @@ beforeskip=0pt,
 \newcommand{\thesisStartDate}[1]{\def \theThesisStartDate{#1}}
 \newcommand{\thesisEndDate}[1]{\def \theThesisEndDate{#1}}
 \newcommand{\thesisSignatureDate}[1]{\def \theThesisSignatureDate{#1}}
+\newcommand{\thesisSignature}[1]{\def \theThesisSignature{#1}}
+\newcommand{\thesisSignatureHeight}[1]{\def \theThesisSignatureHeight{#1}}
 \newcommand{\thesisLanguage}[1]{\def \theThesisLanguage{#1}}
 \newcommand{\thesisCC}[1]{\def \theThesisCC{#1}}
 \newcommand{\thesisPythonWatermark}[1]{\def \theThesisPythonWatermark{#1}}
@@ -47,6 +49,8 @@ beforeskip=0pt,
 \thesisStartDate{dd.mm.yyyy}
 \thesisEndDate{dd.mm.yyyy}
 \thesisSignatureDate{dd.mm.yyyy}
+\thesisSignature{}
+\thesisSignatureHeight{2cm}
 \thesisLanguage{english}
 \thesisCC{FALSE}
 \thesisPythonWatermark{FALSE}

eidesstattliche_erklaerung.tex

@@ -13,7 +13,11 @@ to another academic institution and has also not yet been published.
 \>Karlsruhe, \theThesisSignatureDate
 \end{tabbing}
 
-\vspace{2cm}
+\ifx\theThesisSignature\empty
+  \vspace{2cm}
+\else
+  \hspace*{1.5em}\includegraphics[height=\theThesisSignatureHeight]{\theThesisSignature}
+\fi
 \begin{tabbing}
 \hspace{3em}\= \kill
 \>\theThesisAuthor\\[1ex]
@@ -39,7 +43,11 @@ Ich habe keine anderen als die angegebenen Quellen und Hilfsmittel benutzt und w
 \>Karlsruhe, den \theThesisSignatureDate
 \end{tabbing}
 
-\vspace{2cm}
+\ifx\theThesisSignature\empty
+  \vspace{2cm}
+\else
+  \hspace*{1.5em}\includegraphics[height=\theThesisSignatureHeight]{\theThesisSignature}\\[0.5ex]
+\fi
 \begin{tabbing}
 \hspace{3em}\= \kill
 \>\theThesisAuthor\\[1ex]