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Annotation of loncom/cgi/graph.png, revision 1.21

1.1       minaeibi    1: #!/usr/bin/perl
                      2: #
1.21    ! matthew     3: # $Id: graph.png,v 1.20 2003/01/13 17:41:45 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
1.17      minaeibi   33: # YEAR=2003
1.20      minaeibi   34: # 1/7/, 1/13
1.1       minaeibi   35: # A CGI script that dynamically outputs a graphical chart for lonstatistics.
1.5       minaeibi   36: # 
                     37: #### 
1.1       minaeibi   38: 
                     39: use strict;
1.9       minaeibi   40: use GD::Graph::bars;
1.1       minaeibi   41: use GD::Graph::colour;
                     42: use GD::Graph::Data;
                     43: 
1.21    ! matthew    44: sub unescape {
        !            45:     my $str=shift;
        !            46:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        !            47:     return $str;
        !            48: }
        !            49: 
1.4       matthew    50: $|=1;   # Autoflush after each print/write
1.11      minaeibi   51: my ($Titr,$xlab,$ylab,$Max,$PNo,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'});
1.21    ! matthew    52: $Titr = &unescape($Titr);
        !            53: $xlab = &unescape($xlab);
        !            54: $ylab = &unescape($ylab);
1.11      minaeibi   55: 
                     56: my @data11=split(/\,/,$data1);
                     57: my @data12=split(/\,/,$data2);
1.18      minaeibi   58: my $skip_x = 1;
                     59: my $bar_space=10;
1.1       minaeibi   60: 
                     61: my @xlabels;
1.17      minaeibi   62: 
1.19      minaeibi   63: if ($Titr =~ /^Percentage$/){
1.17      minaeibi   64:     for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
1.18      minaeibi   65:         $xlabels[$nIdx]=$nIdx;
1.17      minaeibi   66:     }
                     67:     @data11=();
                     68:     @data11=split(/\,/,$data2);
1.19      minaeibi   69:     @data12=();
                     70:     $Titr = '';
1.17      minaeibi   71: } else {
                     72:      for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
                     73:          $xlabels[$nIdx]=$nIdx+1;
                     74:      }
1.1       minaeibi   75: } 
1.11      minaeibi   76: 
                     77: my @data =(\@xlabels,\@data11,\@data12);
1.1       minaeibi   78: 
1.21    ! matthew    79: my $width;
        !            80: my $height = 200;
1.12      minaeibi   81: 
1.11      minaeibi   82: if ($xlab=~/^Concepts$/){
1.21    ! matthew    83:     $width=270;
        !            84: } elsif ($xlab=~/^Problem\snumber$/){
        !            85:     $width=450;
1.19      minaeibi   86: } else {
1.21    ! matthew    87:     $width=($PNo==100) ? 800 : (120+$PNo*10); 
1.18      minaeibi   88:     $skip_x=5;
                     89:     $bar_space=1;
1.11      minaeibi   90: }
1.1       minaeibi   91: 
1.21    ! matthew    92: my $x_tick_offset = 0;
        !            93: if ($skip_x > 1) {
        !            94:     $x_tick_offset = $skip_x - 1;
        !            95: }
1.1       minaeibi   96: 
1.21    ! matthew    97: my $MyGraph = GD::Graph::bars->new($width,$height);
1.1       minaeibi   98: 
                     99: $MyGraph->set( 
1.14      minaeibi  100:     x_label         => $xlab,
1.11      minaeibi  101:     y_label         => $ylab,
1.21    ! matthew   102:     x_label_position => 0.5,
1.11      minaeibi  103:     long_ticks      => 1,
                    104:     tick_length     => 0,
                    105:     x_ticks         => 0,
                    106:     title           => $Titr,
1.1       minaeibi  107:     y_max_value     => $Max,
1.11      minaeibi  108: #    y_tick_number   => $ytic,
1.18      minaeibi  109:     y_label_skip    => 5,
                    110:     x_label_skip    => $skip_x,   
1.21    ! matthew   111:     x_tick_offset   => $x_tick_offset,
1.11      minaeibi  112: 
1.13      minaeibi  113:     dclrs           => [ qw( lgreen dgreen lyellow lpurple cyan lorange)],
1.1       minaeibi  114:     
1.18      minaeibi  115:     bar_spacing     => $bar_space,
1.11      minaeibi  116:     cumulate        => 2,
                    117:     zero_axis        => 1,
                    118: 
                    119: #    legend_placement    => 'RT',
                    120: 
                    121:     fgclr               => 'black',
1.13      minaeibi  122:     boxclr              => 'white',
1.11      minaeibi  123:     accentclr           => 'dblue',
                    124:     valuesclr           => '#ffff77',
                    125:     l_margin            => 10,
                    126:     b_margin            => 10,
                    127:     r_margin            => 10,
                    128:     t_margin            => 10,
1.1       minaeibi  129: 
                    130:     transparent     => 0,
                    131: ) or warn $MyGraph->error; 
1.14      minaeibi  132: 
1.12      minaeibi  133: 
1.16      albertel  134: # Tell the server we are sending a png graphic
1.1       minaeibi  135: print <<END;
1.16      albertel  136: Content-type: image/png
1.1       minaeibi  137: 
                    138: END
                    139: 
                    140: my $BinaryData=$MyGraph->plot(\@data)->png;
                    141: undef $MyGraph;
                    142: binmode(STDOUT);
1.16      albertel  143: #open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image
                    144: #print IMG $BinaryData; # output image
                    145: #$|=1; # be sure to flush before closing
                    146: #close IMG;
                    147: print $BinaryData;