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Annotation of loncom/cgi/graph.png, revision 1.11

1.1       minaeibi    1: #!/usr/bin/perl
                      2: #
1.11    ! minaeibi    3: # $Id: graph.gif,v 1.10 2002/02/02 11:06:00 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
1.11    ! minaeibi   32: # 2/1/02, 5/13/02, 
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: 
        !            53: #my $bg = (defined(@data2)) ? 'lorange' : 'white';
        !            54: 
        !            55: my @data =(\@xlabels,\@data11,\@data12);
1.1       minaeibi   56: 
                     57: my $Range;
1.11    ! minaeibi   58: if ($xlab=~/^Concepts$/){
        !            59:     $Range=500;
        !            60: } 
        !            61: else {
        !            62:     if ( $PNo > 10 ) {$Range = 30*$PNo;}
        !            63:     else { $Range = 400+30*$PNo; }
        !            64: }
1.1       minaeibi   65: 
                     66: 
1.9       minaeibi   67: my $MyGraph = GD::Graph::bars->new($Range, 400);
1.1       minaeibi   68: 
                     69: $MyGraph->set( 
1.11    ! minaeibi   70:     x_label         => $xlab,
        !            71:     y_label         => $ylab,
        !            72:     long_ticks      => 1,
        !            73:     tick_length     => 0,
        !            74:     x_ticks         => 0,
        !            75: #    title           => 'LON-CAPA Option Response Problem:'.$cid,
        !            76:     title           => $Titr,
1.1       minaeibi   77:     y_max_value     => $Max,
1.11    ! minaeibi   78: #    y_tick_number   => $ytic,
        !            79:     y_label_skip    => 1,   
        !            80: 
        !            81:     dclrs           => [ qw( green dgreen lyellow lpurple cyan lorange)],
1.1       minaeibi   82:     
1.11    ! minaeibi   83:     bar_spacing     => 10,
        !            84:     cumulate        => 2,
        !            85:     zero_axis        => 1,
        !            86: 
        !            87: #    legend_placement    => 'RT',
        !            88: 
        !            89:     fgclr               => 'black',
        !            90:     boxclr              => 'lorange',
        !            91:     accentclr           => 'dblue',
        !            92:     valuesclr           => '#ffff77',
        !            93: 
        !            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 $MyGraph->error; 
1.11    ! minaeibi  101: if ($xlab=~/^Concepts$/){
        !           102:     $MyGraph->set_legend( 'Correct Answers', 'Incorrect Answers');
        !           103: }
1.1       minaeibi  104: # Tell the server we are sending a gif graphic
                    105: print <<END;
                    106: Content-type: image/gif
                    107: 
                    108: END
                    109: 
                    110: my $BinaryData=$MyGraph->plot(\@data)->png;
                    111: undef $MyGraph;
                    112: binmode(STDOUT);
1.2       minaeibi  113: open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image
1.1       minaeibi  114: print IMG $BinaryData; # output image
                    115: $|=1; # be sure to flush before closing
                    116: close IMG;