function simcad(fileName)
%SIMCAD The Simulink system caddy.
%   SIMCAD is used solely by the Simulink demos.  It provides an
%   interface from which you can run a demo as well as view
%   information about it.
%
%   This function is not intended for use other than by Simulink
%   demos.

%   Ned Gulley, 6-21-93
%   Copyright 1990-2002 The MathWorks, Inc.
%   $Revision: 5.11 $

eval(fileName);

str= ...                                                             
  ['                                                            '  
   ' With any Simulink system, you can start the simulation     '  
   ' by selecting "Start" from the "Simulation" menu. Once you  '  
   ' have started, you can always terminate a simulation by     '  
   ' selecting "Stop" from the same menu.  Some simulations may '
   ' reach their pre-set stop time and terminate automatically. '
   ' You can set the simulation stop time, step size, and other '
   ' simulation parameters by editing the "Parameters" dialog   '
   ' box under the "Simulation" menu.                           '  
   '                                                            '  
   ' You can select and move any block on a Simulink block      '  
   ' diagram by clicking once and dragging.  You can generally  '  
   ' open a Simulink block by double-clicking on it. For        '  
   ' example, demo systems will often have a box marked with    '  
   ' a question mark (?). By double-clicking on this block, you '  
   ' can reveal an explanatory note contained inside it.        '  
   '                                                            '  
   ' When you have finished with a Simulink system, you         '  
   ' can close it by selecting "Close" from the "File" menu.    '];

helpStrings=get_param([fileName '/More Info'],'blocks');

if ~isempty(helpStrings),
  % Now get the text from the "More Info" block and format it properly
  for count=1:size(helpStrings,1),
    pos=get_param([fileName '/More Info/' helpStrings{count}],'position');
    yPos(count)=pos(4);
  end;
  [yPosSorted,newOrder]=sort(yPos);
  helpStrings={helpStrings{newOrder}};
  newHelpStr=[];
  for count=1:size(helpStrings,1),
    helpStrTemp=helpStrings{count};
    % Replace newlines (ASCII 10) with newline and a space
    helpStrTemp=strrep(helpStrTemp,10,[13 10 32]);      
    newHelpStr=str2mat(newHelpStr,helpStrTemp,' ');
  end;
  fileWithExt=which(fileName);
  startOfFileName=findstr(fileName,fileWithExt);
  fileWithExt=fileWithExt(startOfFileName:end);
  newHelpStr=str2mat(newHelpStr,['File name: ' fileWithExt]);
  newHelpStr=[32*ones(size(newHelpStr,1),1) newHelpStr];
  xppage(['Simulink Info for the system ' fileName],str,newHelpStr);
else
  xppage(['Simulink Info for the system ' fileName],str);
end;