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Annotation of loncom/cgi/graph.png, revision 1.16

1.1       minaeibi    1: #!/usr/bin/perl
                      2: #
1.16    ! albertel    3: # $Id: graph.gif,v 1.15 2002/11/01 22:12:46 minaeibi Exp $
1.5       minaeibi    4: #
                      5: # Copyright Michigan State University Board of Trustees
                      6: #
                      7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      8: #
                      9: # LON-CAPA is free software; you can redistribute it and/or modify
                     10: # it under the terms of the GNU General Public License as published by
                     11: # the Free Software Foundation; either version 2 of the License, or
                     12: # (at your option) any later version.
                     13: #
                     14: # LON-CAPA is distributed in the hope that it will be useful,
                     15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     17: # GNU General Public License for more details.
                     18: #
                     19: # You should have received a copy of the GNU General Public License
                     20: # along with LON-CAPA; if not, write to the Free Software
                     21: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     22: #
                     23: # /home/httpd/cgi-bin/graph.gif
                     24: #
                     25: # http://www.lon-capa.org/
                     26: #
1.1       minaeibi   27: # The LearningOnline Network with CAPA
                     28: # Behrouz Minaei
1.5       minaeibi   29: # YEAR=2001
1.9       minaeibi   30: # 9/13/01, 9/25/01, 10/6/01, 10/9/01, 12/25/01
                     31: # YEAR=2002
1.13      minaeibi   32: # 2/1/, 5/13, 5/15
1.1       minaeibi   33: # A CGI script that dynamically outputs a graphical chart for lonstatistics.
1.5       minaeibi   34: # 
                     35: #### 
1.1       minaeibi   36: 
                     37: use strict;
1.9       minaeibi   38: use GD::Graph::bars;
1.1       minaeibi   39: use GD::Graph::colour;
                     40: use GD::Graph::Data;
                     41: 
1.4       matthew    42: $|=1;   # Autoflush after each print/write
1.11      minaeibi   43: my ($Titr,$xlab,$ylab,$Max,$PNo,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'});
                     44: 
                     45: my @data11=split(/\,/,$data1);
                     46: my @data12=split(/\,/,$data2);
1.1       minaeibi   47: 
                     48: my @xlabels;
                     49: for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
                     50:     $xlabels[$nIdx]=$nIdx+1;
                     51: } 
1.11      minaeibi   52: 
1.13      minaeibi   53: 
1.11      minaeibi   54: 
                     55: my @data =(\@xlabels,\@data11,\@data12);
1.1       minaeibi   56: 
1.12      minaeibi   57: my $Range1;
                     58: my $Range2;
                     59: 
1.11      minaeibi   60: if ($xlab=~/^Concepts$/){
1.12      minaeibi   61:     $Range1=270;
                     62:     $Range2=200;
                     63: } else {
1.15      minaeibi   64:     $Range1=450;#250+30*$PNo; 
1.12      minaeibi   65:     $Range2=200; 
1.11      minaeibi   66: }
1.1       minaeibi   67: 
                     68: 
1.12      minaeibi   69: my $MyGraph = GD::Graph::bars->new($Range1,$Range2);
1.1       minaeibi   70: 
                     71: $MyGraph->set( 
1.14      minaeibi   72:     x_label         => $xlab,
1.11      minaeibi   73:     y_label         => $ylab,
                     74:     long_ticks      => 1,
                     75:     tick_length     => 0,
                     76:     x_ticks         => 0,
                     77:     title           => $Titr,
1.1       minaeibi   78:     y_max_value     => $Max,
1.11      minaeibi   79: #    y_tick_number   => $ytic,
                     80:     y_label_skip    => 1,   
                     81: 
1.13      minaeibi   82:     dclrs           => [ qw( lgreen dgreen lyellow lpurple cyan lorange)],
1.1       minaeibi   83:     
1.11      minaeibi   84:     bar_spacing     => 10,
                     85:     cumulate        => 2,
                     86:     zero_axis        => 1,
                     87: 
                     88: #    legend_placement    => 'RT',
                     89: 
                     90:     fgclr               => 'black',
1.13      minaeibi   91:     boxclr              => 'white',
1.11      minaeibi   92:     accentclr           => 'dblue',
                     93:     valuesclr           => '#ffff77',
                     94:     l_margin            => 10,
                     95:     b_margin            => 10,
                     96:     r_margin            => 10,
                     97:     t_margin            => 10,
1.1       minaeibi   98: 
                     99:     transparent     => 0,
                    100: ) or warn $MyGraph->error; 
1.14      minaeibi  101: 
1.12      minaeibi  102: #if ($xlab=~/^Concepts$/){
                    103: #    $MyGraph->set_legend( 'Correct Answers', 'Incorrect Answers');
                    104: #}
                    105: 
                    106: 
1.16    ! albertel  107: # Tell the server we are sending a png graphic
1.1       minaeibi  108: print <<END;
1.16    ! albertel  109: Content-type: image/png
1.1       minaeibi  110: 
                    111: END
1.12      minaeibi  112: 
                    113: #$MyGraph->set_y_label_font('/home/httpd/cgi-bin/cetus.ttf', 16);
                    114: #$MyGraph->set_x_label_font('/home/httpd/cgi-bin/cetus.ttf', 16);
                    115: #$MyGraph->set_y_axis_font('/home/httpd/cgi-bin/cetus.ttf', 12);
                    116: #$MyGraph->set_x_axis_font('/home/httpd/cgi-bin/cetus.ttf', 12);
                    117: #$MyGraph->set_title_font('/home/httpd/cgi-bin/cetus.ttf', 18);
                    118: #$MyGraph->set_legend_font('/home/httpd/cgi-bin/cetus.ttf', 10);
                    119: #$MyGraph->set_values_font('/home/httpd/cgi-bin/cetus.ttf', 10);
                    120: 
1.1       minaeibi  121: 
                    122: my $BinaryData=$MyGraph->plot(\@data)->png;
                    123: undef $MyGraph;
                    124: binmode(STDOUT);
1.16    ! albertel  125: #open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image
        !           126: #print IMG $BinaryData; # output image
        !           127: #$|=1; # be sure to flush before closing
        !           128: #close IMG;
        !           129: print $BinaryData;