--- loncom/cgi/graph.png	2001/10/10 15:26:00	1.1
+++ loncom/cgi/graph.png	2001/12/25 23:37:43	1.5
@@ -1,18 +1,44 @@
 #!/usr/bin/perl
 #
-# The LearningOnline Network with CAPA
+# $Id: graph.png,v 1.5 2001/12/25 23:37:43 minaeibi Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
+# /home/httpd/cgi-bin/graph.gif
+#
+# http://www.lon-capa.org/
+#
+# The LearningOnline Network with CAPA
 # Behrouz Minaei
-# 9/13/2001, 9/25/2001
-# 10/6/2001, 10,9,2001
+# YEAR=2001
+# 9/13/2001, 9/25/2001, 10/6/2001, 10/9/2001, 12/25/2001
 #
 # A CGI script that dynamically outputs a graphical chart for lonstatistics.
+# 
+#### 
 
 use strict;
-use GD::Graph::bars;
+use GD::Graph::bars3d;
 use GD::Graph::colour;
 use GD::Graph::Data;
 
+$|=1;   # Autoflush after each print/write
 my ($cid, $Tag, $Max, $PNo, $data) = split(/&/,$ENV{'QUERY_STRING'});
 
 my @data1=split(/\,/,$data);
@@ -23,25 +49,15 @@ for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
 } 
 my @data =(\@xlabels,\@data1);
 
-#print "Content-type: text/html\n\n";
-#print $ENV{'QUERY_STRING';
-#print "<br>";
-#print $Max;
-#print "<br>";
-#print $PNo;
-#print "<br>";
-#print $data;
-#exit;
-
 my $Range;
 if ( $PNo > 10 ) {$Range = 30*$PNo;}
 else { $Range = 300+30*$PNo; }
 
-if ( $Max < 1 ) { $Max = 1; }
-elsif ( $Max < 10 ) { $Max = 10; }
-elsif ( $Max < 100 ) { $Max = 100; }
+if ( $Max <= 1 ) { $Max = 1; }
+elsif ( $Max <= 10 ) { $Max = 10; }
+elsif ( $Max >= 60 ) { $Max = 100; }
 
-my $MyGraph = GD::Graph::bars->new($Range, 400);
+my $MyGraph = GD::Graph::bars3d->new($Range, 400);
 
 $MyGraph->set( 
     x_label         => 'Problems #',
@@ -53,7 +69,7 @@ $MyGraph->set(
     x_label_skip    => 2,
     
     # colors
-    dclrs           => [ qw(green lblue lyellow lpurple cyan lorange)],
+    dclrs           => [ qw( green lblue lyellow lpurple cyan lorange)],
     
     # shadows
     bar_spacing     => 4,
@@ -72,21 +88,8 @@ END
 my $BinaryData=$MyGraph->plot(\@data)->png;
 undef $MyGraph;
 binmode(STDOUT);
-open IMG,"|pngtopnm|ppmtogif"; # convert into a gif image
+open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image
 print IMG $BinaryData; # output image
 $|=1; # be sure to flush before closing
 close IMG;
 
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