[Sommaire] [Imprimer]

   1  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
   2  <HTML>
   3  <HEAD>
   4  <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=iso-iso-8859-1">
   5  <LINK REL="Start" HREF="index.html">
   6  <LINK REL="Contents" HREF="toc.html">
   7  <LINK REL="Prev" HREF="64ExamplesofImagemaps.html">
   8  <LINK REL="Next" HREF="66Gettingholdoftheimagemap.html">
   9  <STYLE TYPE="text/css"><!--
  10  BODY { font-family: serif }
  11  H1 { font-family: sans-serif }
  12  H2 { font-family: sans-serif }
  13  H3 { font-family: sans-serif }
  14  H4 { font-family: sans-serif }
  15  H5 { font-family: sans-serif }
  16  H6 { font-family: sans-serif }
  17  SUB { font-size: smaller }
  18  SUP { font-size: smaller }
  19  PRE { font-family: monospace }
  20  A { text-decoration: none }
  21  --></STYLE>
  22  </HEAD>
  23  <BODY>
  24  <A HREF="toc.html">Contents</A>
  25  <A HREF="64ExamplesofImagemaps.html">Previous</A>
  26  <A HREF="66Gettingholdoftheimagemap.html">Next</A>
  27  <HR NOSHADE>
  28  <H2><A NAME="6_5">6.5 How does StrokeCSIM() work?</A></H2>
  29  <P> Knowledge of the exact technical details of the way StrokeCSIM()
  30   works is probably not needed by many people but for completeness we
  31   outline those details in this short section.</P>
  32  <P> The fundamental issue we have to solve is that we must be able to
  33   call the image script in two modes. When the user includes the image
  34   script the StrokeCSIM() method should return the HTML page but when the
  35   image script is later called directly in the image tag it must not
  36   return an HTML page but rather the actual image.</P>
  37  <P> The way this is solved is by using one HTTP argument which is passed
  38   on automatically when we use the image script name in the image-tag.</P>
  39  <P> If you look at the generated HTML you will see that the argument to
  40   the src-property of the image tag is not simply the script name but the
  41   script name with a additional argument.</P>
  42  <P> In the JpGraph internal code this pre-defined argument is checked
  43   for and if it exists the image is send back and not the HTML page.</P>
  44  <P> The name of this argument is defined by a DEFINE() statement in
  45   JpGraph. The define is _CSIM_DISPLAY.</P>
  46  <HR NOSHADE>
  47  <A HREF="toc.html">Contents</A>
  48  <A HREF="64ExamplesofImagemaps.html">Previous</A>
  49  <A HREF="66Gettingholdoftheimagemap.html">Next</A>
  50  </BODY>
  51  </HTML>