%% 
%%  A DANTE-Edition example
%% 
%%  Example 10-04-1 on page 115.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}
\setlength\fboxsep{0pt}

\usepackage{pstricks}
\newcommand*\exa[1][0pt]{%
  \fbox{\clipbox[#1]{\begin{pspicture}(1,0.5)
    \psline(2,2)\end{pspicture}}}}

\begin{document}
\psset{linewidth=10pt}
\fbox{\pspicture(1,.5)\psline(2,2)\endpspicture}
\exa\\[10pt]
\exa[10pt] \exa[-10pt]
\fbox{\pspicture*(1,.5)\psline(2,2)\endpspicture}
\end{document}