[LON-CAPA-cvs] cvs: loncom /interface loncommon.pm

[matthew]

matthew		Thu Oct  9 18:07:08 2003 EDT

  Modified files:              
    /loncom/interface	loncommon.pm 
  Log:
  Added DrawGraph, an interface to graph.png.
  
  
Index: loncom/interface/loncommon.pm
diff -u loncom/interface/loncommon.pm:1.126 loncom/interface/loncommon.pm:1.127
--- loncom/interface/loncommon.pm:1.126	Sat Oct  4 20:44:44 2003
+++ loncom/interface/loncommon.pm	Thu Oct  9 18:07:08 2003
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.126 2003/10/05 00:44:44 www Exp $
+# $Id: loncommon.pm,v 1.127 2003/10/09 22:07:08 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2658,6 +2658,60 @@
     }
     return undef;
 }
+
+############################################################
+############################################################
+
+=pod
+
+=item DrawGraph
+
+Returns a link to cgi-bin/graph
+
+=cut
+
+############################################################
+############################################################
+sub DrawGraph {
+    my ($Title,$xlabel,$ylabel,$Max,$values1,$values2)=@_;
+    #
+    my $identifier = time.'_'.int(rand(1000));
+    if (! defined($values1) || ref($values1) ne 'ARRAY') {
+        return '';
+    }
+    #
+    $Title  = '' if (! defined($Title));
+    $xlabel = '' if (! defined($xlabel));
+    $ylabel = '' if (! defined($ylabel));
+    $Title  = &Apache::lonnet::escape($Title);
+    $xlabel = &Apache::lonnet::escape($xlabel);
+    $ylabel = &Apache::lonnet::escape($ylabel);
+    #
+    my $data1 = join(',', @$values1);
+    my $data2;
+    if (defined($values2)) {
+        $data2 = join(',', @$values2);
+    }
+    #
+    my $NumBars = scalar(@$values1);
+    $Max = 1 if ($Max < 1);
+    if ( int($Max) < $Max ) {
+        $Max++;
+        $Max = int($Max);
+    }
+    #
+    &Apache::lonnet::appenv($identifier.'.title'   => $Title,
+                            $identifier.'.xlabel'  => $xlabel,
+                            $identifier.'.ylabel'  => $ylabel,
+                            $identifier.'.Max'     => $Max,
+                            $identifier.'.NumBars' => $NumBars,
+                            $identifier.'.data1'   => $data1,
+                            $identifier.'.data2'   => $data2);
+    return '<IMG src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
+}
+
+############################################################
+############################################################
 
 =pod