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Annotation of loncom/cgi/graph.png, revision 1.20

1.1       minaeibi    1: #!/usr/bin/perl
                      2: #
1.19      minaeibi    3: # $Id: graph.png,v 1.18 2003/01/11 06:28:19 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: 
1.4       matthew    44: $|=1;   # Autoflush after each print/write
1.11      minaeibi   45: my ($Titr,$xlab,$ylab,$Max,$PNo,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'});
                     46: 
                     47: my @data11=split(/\,/,$data1);
                     48: my @data12=split(/\,/,$data2);
1.18      minaeibi   49: my $skip_x = 1;
                     50: my $bar_space=10;
1.1       minaeibi   51: 
                     52: my @xlabels;
1.17      minaeibi   53: 
1.19      minaeibi   54: if ($Titr =~ /^Percentage$/){
1.17      minaeibi   55:     for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
1.18      minaeibi   56:         $xlabels[$nIdx]=$nIdx;
1.17      minaeibi   57:     }
                     58:     @data11=();
                     59:     @data11=split(/\,/,$data2);
1.19      minaeibi   60:     @data12=();
                     61:     $Titr = '';
1.17      minaeibi   62: } else {
                     63:      for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) {
                     64:          $xlabels[$nIdx]=$nIdx+1;
                     65:      }
1.1       minaeibi   66: } 
1.11      minaeibi   67: 
                     68: my @data =(\@xlabels,\@data11,\@data12);
1.1       minaeibi   69: 
1.12      minaeibi   70: my $Range1;
1.20    ! minaeibi   71: my $Range2 = 200;
1.12      minaeibi   72: 
1.11      minaeibi   73: if ($xlab=~/^Concepts$/){
1.12      minaeibi   74:     $Range1=270;
1.19      minaeibi   75: } elsif ($xlab=~/^Problem_number$/){
                     76:     $Range1=450;
                     77: } else {
1.20    ! minaeibi   78:     $Range1=($PNo==100) ? 800 : (120+$PNo*10); 
1.18      minaeibi   79:     $skip_x=5;
                     80:     $bar_space=1;
1.11      minaeibi   81: }
1.1       minaeibi   82: 
                     83: 
1.12      minaeibi   84: my $MyGraph = GD::Graph::bars->new($Range1,$Range2);
1.1       minaeibi   85: 
                     86: $MyGraph->set( 
1.14      minaeibi   87:     x_label         => $xlab,
1.11      minaeibi   88:     y_label         => $ylab,
                     89:     long_ticks      => 1,
                     90:     tick_length     => 0,
                     91:     x_ticks         => 0,
                     92:     title           => $Titr,
1.1       minaeibi   93:     y_max_value     => $Max,
1.11      minaeibi   94: #    y_tick_number   => $ytic,
1.18      minaeibi   95:     y_label_skip    => 5,
                     96:     x_label_skip    => $skip_x,   
1.11      minaeibi   97: 
1.13      minaeibi   98:     dclrs           => [ qw( lgreen dgreen lyellow lpurple cyan lorange)],
1.1       minaeibi   99:     
1.18      minaeibi  100:     bar_spacing     => $bar_space,
1.11      minaeibi  101:     cumulate        => 2,
                    102:     zero_axis        => 1,
                    103: 
                    104: #    legend_placement    => 'RT',
                    105: 
                    106:     fgclr               => 'black',
1.13      minaeibi  107:     boxclr              => 'white',
1.11      minaeibi  108:     accentclr           => 'dblue',
                    109:     valuesclr           => '#ffff77',
                    110:     l_margin            => 10,
                    111:     b_margin            => 10,
                    112:     r_margin            => 10,
                    113:     t_margin            => 10,
1.1       minaeibi  114: 
                    115:     transparent     => 0,
                    116: ) or warn $MyGraph->error; 
1.14      minaeibi  117: 
1.12      minaeibi  118: 
1.16      albertel  119: # Tell the server we are sending a png graphic
1.1       minaeibi  120: print <<END;
1.16      albertel  121: Content-type: image/png
1.1       minaeibi  122: 
                    123: END
                    124: 
                    125: my $BinaryData=$MyGraph->plot(\@data)->png;
                    126: undef $MyGraph;
                    127: binmode(STDOUT);
1.16      albertel  128: #open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image
                    129: #print IMG $BinaryData; # output image
                    130: #$|=1; # be sure to flush before closing
                    131: #close IMG;
                    132: print $BinaryData;