"oldboxstyle"

ptbposter/ptbposter-tcb.sty

 
-\ProvidesPackage{ptbposter-tcb}[2020/02/13 v0.1c ptbposter/tcolorbox (RN)]
+\ProvidesPackage{ptbposter-tcb}[2020/02/14 v0.1d ptbposter/tcolorbox (RN)]
 
 \newcommand*\PTB@posterSet{%
   columns=3,rows=5,spacing=\PTB@texthsep,showframe=false,}
@@ -7,10 +7,17 @@
   \g@addto@macro\PTB@posterSet{#1}%
 }
 
+\newcommand*\PTB@boxesSet{}
+\DeclareOption{oldboxstyle}{%
+  \g@addto@macro\PTB@boxesSet{sharp corners=downhill,}
+}
+
+\ProcessOptions\relax
+
 \RequirePackage[most]{tcolorbox}
 \tcbuselibrary{poster}
 \usetikzlibrary{shadings,arrows.meta}
-
+ 
 \colorlet{backgroundTop}{Goldenrod2!10}
 \colorlet{backgroundBottom}{Goldenrod2!90}
 \colorlet{boxBackground}{white}
@@ -30,27 +37,29 @@
     width=\textwidth,
     interior style={opacity=0},
     top=0pt,bottom=0pt,left=0pt,right=0pt
-  },%
-  boxes={
-    enhanced standard jigsaw,%sharp corners=downhill,
-    arc=0.012\PTB@scale@base,
-    boxrule=\PTB@framethickness,
-    boxsep=0pt,
-    top=1ex,bottom=1ex,left=1ex,right=1ex,
-    toptitle=.6ex,bottomtitle=.6ex,lefttitle=1ex,righttitle=1ex,
-    %before title pre=\strut, 
-    colback=boxBackground,
-    %opacityback=0.75,% ????
-    colframe=PTBcolor,
-    coltitle=white,
-    fonttitle=\sffamily\bfseries\centering,
-    title style={PTBcolor},
-    valign=top% center
-  }
-}%
+  }%
+}% 
+
+\g@addto@macro\PTB@boxesSet{
+  enhanced standard jigsaw,
+  arc=0.012\PTB@scale@base,
+  boxrule=\PTB@framethickness,
+  boxsep=0pt,
+  top=1ex,bottom=1ex,left=1ex,right=1ex,
+  toptitle=.6ex,bottomtitle=.6ex,lefttitle=1ex,righttitle=1ex,
+  %before title pre=\strut, 
+  colback=boxBackground,
+  %opacityback=0.75,% ????
+  colframe=PTBcolor,
+  coltitle=white,
+  fonttitle=\sffamily\bfseries\centering,
+  title style={PTBcolor},
+  valign=top% center
+}
 
 \AtBeginDocument{%
-  \edef\PTB@tempa{\noexpand\tcbposterset{poster={\PTB@posterSet}}}%
+  \protected@edef\PTB@tempa{\noexpand\tcbposterset{poster={\PTB@posterSet},%
+    boxes={\PTB@boxesSet}}}%
   \PTB@tempa
   \begin{tcbposter}%
 }

ptbposter/tcb-example2.tex

@@ -3,7 +3,7 @@
 %,sanserif
 %,a4paper
 ]{ptbposter}
-\usepackage{ptbposter-tcb}
+\usepackage[oldboxstyle]{ptbposter-tcb}
 
 \phone{+49-30-3481-7316}
 \fax{+49-30-3481-7503}