[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="121GeneratingAntiSpamchallenge.html">
   8  <LINK REL="Next" HREF="131AdjustingthesizeoftheLEDdigits.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="121GeneratingAntiSpamchallenge.html">Previous</A>
  26  <A HREF="131AdjustingthesizeoftheLEDdigits.html">Next</A>
  27  <HR NOSHADE>
  28  <H1><A NAME="13">13 Generating LED-like digits with JpGraph</A></H1>
  29   Starting with v1.21 it is possible to generate LED like digits with
  30   JpGraph. This is accomplished by the usage of the &quot;jpgraph_led.php&quot;
  31   module.
  32  <P> The creation of LED digits and letters are extremely simple. The
  33   following complete example demonstrates the creation of a LED display<DIV
  34  class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;
  35  <BR>
  36  <BR></FONT><FONT color="#007700">include&nbsp;</FONT><FONT color="#DD0000">
  37  &quot;../jpgraph.php&quot;</FONT><FONT color="#007700">;
  38  <BR>include&nbsp;</FONT><FONT color="#DD0000">&quot;../jpgraph_led.php&quot;</FONT><FONT
  39  color="#007700">;
  40  <BR>
  41  <BR></FONT><FONT color="#FF8000">
  42  //&nbsp;By&nbsp;default&nbsp;each&nbsp;&quot;LED&quot;&nbsp;circle&nbsp;has&nbsp;a&nbsp;radius&nbsp;of&nbsp;3&nbsp;pixels
  43  <BR></FONT><FONT color="#0000BB">$led&nbsp;</FONT><FONT color="#007700">
  44  =&nbsp;new&nbsp;</FONT><FONT color="#0000BB">DigitalLED74</FONT><FONT color="#007700">
  45  ();
  46  <BR></FONT><FONT color="#0000BB">$led</FONT><FONT color="#007700">-&gt;</FONT><FONT
  47  color="#0000BB">Stroke</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
  48  '0123456789.&nbsp;ABCDEFGHIJKL'</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">
  49  LEDC_GREEN</FONT><FONT color="#007700">);&nbsp;
  50  <BR></FONT><FONT color="#0000BB"></FONT></FONT></CODE></DIV></P>
  51  <P> The result of running this script can be seen by running the
  52   &quot;Examples/ledex1.php&quot; Example in the example directory. As can be seen
  53   from the above example the color to be used for the LED digits is
  54   specified as the second argument to the DigitalLED74::Stroke() method.
  55   Available color for LED digits is given by the table below</P>
  56  <TABLE style="border:darkgray solid 1px;">
  57  <TR><TD><B>Symbolic name</B></TD><TD><B>Color</B></TD></TR>
  58  <TR><TD>LEDC_RED</TD><TD>Red</TD></TR>
  59  <TR><TD>LEDC_GREEN</TD><TD>Green</TD></TR>
  60  <TR><TD>LEDC_BLUE</TD><TD>Blue</TD></TR>
  61  <TR><TD>LEDC_YELLOW</TD><TD>Yellow</TD></TR>
  62  <TR><TD>GREY</TD><TD>Grey</TD></TR>
  63  </TABLE>
  64  <P> Since the standard LED matrix of 7x4 dots does not lend itself to
  65   accurately represent all normal ASCII characters only the following
  66   numbers and letters can be displayed.</P>
  67  <TABLE style="border:darkgray solid 1px;">
  68  <TR><TD>All digits, 0-9</TD></TR>
  69  <TR><TD>Capital Letters, A-L</TD></TR>
  70  </TABLE>
  71  <HR NOSHADE>
  72  <A HREF="toc.html">Contents</A>
  73  <A HREF="121GeneratingAntiSpamchallenge.html">Previous</A>
  74  <A HREF="131AdjustingthesizeoftheLEDdigits.html">Next</A>
  75  </BODY>
  76  </HTML>