partially fixed \marginbox

workshops/latex/latex.tex

@@ -28,10 +28,14 @@
 
 
 \newcommand\marginbox[3][2pt]{
+  % USAGE: \marginbox[margin width]{width}{content}
+  % TODO: width is set manually such that it fits real width!
+  \newlength\marginwidth
+  \setlength\marginwidth{#1}
   \begin{tikzpicture}[even odd rule, scale=1]
     \node[anchor=north west] (text) {%
-      \begin{minipage}{#1}%
-        #2%
+      \begin{minipage}{#2-2\marginwidth-10pt}%
+        #3%
       \end{minipage}%
     };
     \begin{pgfonlayer}{background}