version 1.21, 2003/03/26 21:52:37
|
version 1.26, 2003/10/16 19:54:42
|
Line 25
|
Line 25
|
# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
# |
# |
# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# Behrouz Minaei |
# |
# YEAR=2001 |
|
# 9/13/01, 9/25/01, 10/6/01, 10/9/01, 12/25/01 |
|
# YEAR=2002 |
|
# 2/1/, 5/13, 5/15 |
|
# YEAR=2003 |
|
# 1/7/, 1/13 |
|
# A CGI script that dynamically outputs a graphical chart for lonstatistics. |
# A CGI script that dynamically outputs a graphical chart for lonstatistics. |
# |
# |
#### |
#### |
|
|
|
=pod |
|
|
|
=head1 NAME |
|
|
|
graph.png |
|
|
|
=head1 SYNOPSIS |
|
|
|
produces plots based on input |
|
|
|
=head1 DESCRIPTION |
|
|
|
graph.png is a cgi-bin script which produces plots based on input data. |
|
|
|
The query string is expected to be as follows (without whitespace): |
|
|
|
escape(Plot title) & escape(X label)& escape(Y label) & Maximum Y value & |
|
Number of bars & $data1 & $data2 |
|
|
|
$data1 and $data2 are expected to be comma seperated lists of numbers. |
|
escape( value ) means the values must be run through lonnet::escape. |
|
|
|
=cut |
|
|
use strict; |
use strict; |
|
use lib '/home/httpd/lib/perl'; |
use GD::Graph::bars; |
use GD::Graph::bars; |
use GD::Graph::colour; |
use GD::Graph::colour; |
use GD::Graph::Data; |
use GD::Graph::Data; |
|
use LONCAPA::loncgi(); |
|
|
sub unescape { |
sub unescape { |
my $str=shift; |
my $str=shift; |
Line 47 sub unescape {
|
Line 67 sub unescape {
|
return $str; |
return $str; |
} |
} |
|
|
$|=1; # Autoflush after each print/write |
if (! &LONCAPA::loncgi::check_cookie_and_load_env()) { |
my ($Titr,$xlab,$ylab,$Max,$PNo,$data1,$data2)=split(/&/,$ENV{'QUERY_STRING'}); |
print <<END; |
$Titr = &unescape($Titr); |
Content-type: text/html |
$xlab = &unescape($xlab); |
|
$ylab = &unescape($ylab); |
<html> |
|
<head><title>Bad Cookie</title></head> |
|
<body> |
|
Your cookie information is incorrect. What\'s up with that? |
|
</body> |
|
</html> |
|
END |
|
exit; |
|
} |
|
|
my @data11=split(/\,/,$data1); |
$|=1; # Autoflush after each print/write |
my @data12=split(/\,/,$data2); |
my $identifier = $ENV{'QUERY_STRING'}; |
my $skip_x = 1; |
my $Title = &unescape($ENV{$identifier.'.title'}); |
my $bar_space=10; |
my $xlabel = &unescape($ENV{$identifier.'.xlabel'}); |
|
my $ylabel = &unescape($ENV{$identifier.'.ylabel'}); |
|
my $Max = $ENV{$identifier.'.Max'}; |
|
my $NumBars = $ENV{$identifier.'.NumBars'}; |
|
my $NumSets = $ENV{$identifier.'.NumSets'}; |
|
my @Colors = split(',',$ENV{$identifier.'.Colors'}); |
|
|
|
# |
|
# Labels are always digits |
my @xlabels; |
my @xlabels; |
|
for (my $nIdx=0; $nIdx<$NumBars; $nIdx++ ) { |
|
$xlabels[$nIdx]=$nIdx+1; |
|
} |
|
my @data; # stores the data for the graph |
|
push(@data,\@xlabels); |
|
for (my $i=1;$i<=$NumSets;$i++) { |
|
push(@data,[split(',',$ENV{$identifier.'.data.'.$i})]); |
|
} |
|
|
if ($Titr =~ /^Percentage$/){ |
my $skip_x = 1; |
for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) { |
my $bar_width=10; |
$xlabels[$nIdx]=$nIdx; |
|
} |
|
@data11=(); |
|
@data11=split(/\,/,$data2); |
|
@data12=(); |
|
$Titr = ''; |
|
} else { |
|
for (my $nIdx=0; $nIdx<$PNo; $nIdx++ ) { |
|
$xlabels[$nIdx]=$nIdx+1; |
|
} |
|
} |
|
|
|
my @data =(\@xlabels,\@data11,\@data12); |
|
|
|
|
# |
|
# Customize graph based on the |
my $width; |
my $width; |
my $height = 200; |
my $height = 200; |
|
|
if ($xlab=~/^Concepts$/){ |
if ($NumBars < 10) { |
$width=270; |
$width = 120+$NumBars*15; |
} elsif ($xlab=~/^Problem\snumber$/){ |
$skip_x = 1; |
$width=450; |
$bar_width = 15; |
|
} elsif ($NumBars <= 25) { |
|
$width = 120+$NumBars*11; |
|
$skip_x = 5; |
|
$bar_width = 8; |
|
} elsif ($NumBars <= 50) { |
|
$width = 120+$NumBars*8; |
|
$skip_x = 5; |
|
$bar_width = 4; |
} else { |
} else { |
$width=($PNo==100) ? 800 : (120+$PNo*10); |
$width = 120+$NumBars*8; |
$skip_x=5; |
$skip_x = 5; |
$bar_space=1; |
$bar_width = 4; |
} |
} |
|
|
my $x_tick_offset = 0; |
my $x_tick_offset = 0; |
Line 95 if ($skip_x > 1) {
|
Line 135 if ($skip_x > 1) {
|
} |
} |
|
|
my $MyGraph = GD::Graph::bars->new($width,$height); |
my $MyGraph = GD::Graph::bars->new($width,$height); |
|
my $error = ''; |
|
if (! $MyGraph->set( x_label => $xlabel, |
|
y_label => $ylabel, |
|
x_label_position => 0.5, |
|
long_ticks => 1, |
|
tick_length => 0, |
|
x_ticks => 0, |
|
title => $Title, |
|
y_max_value => $Max, |
|
x_label_skip => $skip_x, |
|
x_tick_offset => $x_tick_offset, |
|
# |
|
dclrs => \@Colors, |
|
bar_width => $bar_width, |
|
cumulate => 2, |
|
zero_axis => 1, |
|
fgclr => 'black', |
|
boxclr => 'white', |
|
accentclr => 'dblue', |
|
valuesclr => '#ffff77', |
|
l_margin => 10, |
|
b_margin => 10, |
|
r_margin => 10, |
|
t_margin => 10, |
|
# |
|
transparent => 0, |
|
)) { |
|
$error = $MyGraph->error; |
|
print <<"END"; |
|
Content-type: text/html |
|
|
|
<html> |
|
<head><title>Bad Graph</title></head> |
|
<body> |
|
<p> |
|
There was an error producing the graph you requested. |
|
</p><p> |
|
$error |
|
</p> |
|
</body> |
|
</html> |
|
END |
|
return; |
|
} |
|
|
$MyGraph->set( |
my $plot = $MyGraph->plot(\@data); |
x_label => $xlab, |
if (! defined($plot)) { |
y_label => $ylab, |
print <<"END"; |
x_label_position => 0.5, |
Content-type: text/html |
long_ticks => 1, |
|
tick_length => 0, |
<html> |
x_ticks => 0, |
<head><title>Bad Graph</title></head> |
title => $Titr, |
<body> |
y_max_value => $Max, |
The system was unable to create the graph you requested. |
# y_tick_number => $ytic, |
</body> |
y_label_skip => 5, |
</html> |
x_label_skip => $skip_x, |
END |
x_tick_offset => $x_tick_offset, |
return; |
|
} |
dclrs => [ qw( lgreen dgreen lyellow lpurple cyan lorange)], |
|
|
|
bar_spacing => $bar_space, |
|
cumulate => 2, |
|
zero_axis => 1, |
|
|
|
# legend_placement => 'RT', |
|
|
|
fgclr => 'black', |
|
boxclr => 'white', |
|
accentclr => 'dblue', |
|
valuesclr => '#ffff77', |
|
l_margin => 10, |
|
b_margin => 10, |
|
r_margin => 10, |
|
t_margin => 10, |
|
|
|
transparent => 0, |
my $BinaryData=$plot->png; |
) or warn $MyGraph->error; |
undef($MyGraph); |
|
undef($plot); |
|
|
|
if (! defined($BinaryData)) { |
|
print <<"END"; |
|
Content-type: text/html |
|
|
|
<html> |
|
<head><title>Bad Graph</title></head> |
|
<body> |
|
The system was unable to produce a png image of the graph you requested. |
|
</body> |
|
</html> |
|
END |
|
return; |
|
} |
|
|
|
|
# Tell the server we are sending a png graphic |
# Tell the server we are sending a png graphic |
Line 137 Content-type: image/png
|
Line 220 Content-type: image/png
|
|
|
END |
END |
|
|
my $BinaryData=$MyGraph->plot(\@data)->png; |
|
undef $MyGraph; |
|
binmode(STDOUT); |
binmode(STDOUT); |
#open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image |
#open IMG,"|pngtopnm|ppmtogif 2>/dev/null"; # convert into a gif image |
#print IMG $BinaryData; # output image |
#print IMG $BinaryData; # output image |