--- loncom/xml/lonplot.pm 2008/06/09 10:07:01 1.146
+++ loncom/xml/lonplot.pm 2011/07/04 09:25:13 1.153
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Dynamic plot
#
-# $Id: lonplot.pm,v 1.146 2008/06/09 10:07:01 foxr Exp $
+# $Id: lonplot.pm,v 1.153 2011/07/04 09:25:13 foxr Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -26,6 +26,9 @@
# http://www.lon-capa.org/
#
+
+
+
package Apache::lonplot;
use strict;
@@ -57,6 +60,8 @@ BEGIN {
}
+=pod
+
##
## Description of data structures:
##
@@ -88,6 +93,8 @@ BEGIN {
## ##
###################################################################
+=cut
+
my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
# is longer than this, it will be truncated.
@@ -448,7 +455,7 @@ my %tic_defaults =
},
);
-my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat');
+my @axis_edit_order = ('color','xmin','xmax','ymin','ymax','xformat', 'yformat', 'xzero', 'yzero');
my %axis_defaults =
(
color => {
@@ -496,11 +503,26 @@ my %axis_defaults =
yformat => {
default => 'on',
test => sub {$_[0]=~/^(on|off|\d+(f|F|e|E))$/},
- description => 'X-axis number formatting',
+ description => 'Y-axis number formatting',
edit_type => 'choice',
choices => ['on', 'off', '2e', '2f'],
},
-
+
+ xzero => {
+ default => 'off',
+ test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
+ description => 'Show x-zero (y=0) axis',
+ edit_type => 'choice',
+ choices => ['off', 'line', 'thick-line', 'dotted'],
+ },
+
+ yzero => {
+ default => 'off',
+ test => sub {$_[0]=~/^(off|line|thick-line|dotted)$/},
+ description => 'Show y-zero (x=0) axis',
+ edit_type => 'choice',
+ choices => ['off', 'line', 'thick-line', 'dotted'],
+ },
);
my @curve_edit_order = ('color','name','linestyle','linewidth','linetype','pointtype','pointsize','limit');
@@ -612,6 +634,8 @@ sub end_gnuplot {
('title','xlabel','ylabel','key','axis','label','curve'));
my $result = '';
my $randnumber;
+ my $tmpdir =LONCAPA::tempdir(); # Where temporary files live:
+
# need to call rand everytime start_script would evaluate, as the
# safe space rand number generator and the global rand generator
# are not separate
@@ -623,7 +647,6 @@ sub end_gnuplot {
&check_inputs(); # Make sure we have all the data we need
##
## Determine filename
- my $tmpdir = '/home/httpd/perl/tmp/';
my $filename = $env{'user.name'}.'_'.$env{'user.domain'}.
'_'.time.'_'.$$.$randnumber.'_plot';
## Write the plot description to the file
@@ -644,7 +667,7 @@ ENDIMAGE
#might be inside the safe space, register the URL for later
&Apache::lonxml::register_ssi("/cgi-bin/plot.gif?file=$filename.data&output=eps");
$result = "%DYNAMICIMAGE:$Apache::lonplot::plot{'width'}:$Apache::lonplot::plot{'height'}:$Apache::lonplot::plot{'texwidth'}\n";
- $result .= '\graphicspath{{/home/httpd/perl/tmp/}}'."\n";
+ $result .= '\graphicspath{{'.$tmpdir.'}}'."\n";
$result .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
}
} elsif ($target eq 'edit') {
@@ -1362,6 +1385,7 @@ sub start_function {
my $function = &Apache::lonxml::get_all_text("/function",$parser,
$style);
$function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
+ $function=~s/\^/\*\*/gs;
$curves[-1]->{'function'} = $function;
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
@@ -1432,7 +1456,7 @@ sub start_data {
}
# complain if the number of data points is not the same as
# in previous sets of data.
- if (($curves[-1]->{'data'}) && ($#data != $#{@{$curves[-1]->{'data'}->[0]}})){
+ if (($curves[-1]->{'data'}) && ($#data != $#{$curves[-1]->{'data'}->[0]})){
&Apache::lonxml::warning
('Number of data points is not consistent with previous '.
'number of data points');
@@ -1586,7 +1610,7 @@ sub write_gnuplot_file {
}
$gnuplot_input .= ' "'.$font_properties->{'printname'}.'" ';
$gnuplot_input .= $fontsize;
- $gnuplot_input .= "\nset output \"/home/httpd/perl/tmp/".
+ $gnuplot_input .= "\nset output \"".$tmpdir.
&unescape($filename).".eps\"\n";
$gnuplot_input .= "set encoding iso_8859_1\n"; # Get access to extended font.
@@ -1695,14 +1719,13 @@ sub write_gnuplot_file {
$gnuplot_input .= "$ytics{'start'}, ";
$gnuplot_input .= "$ytics{'increment'}, ";
$gnuplot_input .= "$ytics{'end'} ";
+ if ($target eq 'tex') {
+ $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
+ }
+ $gnuplot_input .= "\n";
if ($ytics{'minorfreq'} != 0) {
$gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
}
- if ($target eq 'tex') {
- $gnuplot_input .= 'font "Helvetica,22"'; # Needed in iso-8859-1 encoding.
- }
- $gnuplot_input .= "\n";
-
} else {
if ($target eq 'tex') {
$gnuplot_input .= 'set ytics font "Helvetica,22"'."\n"; # Needed for iso 8859-1 enc.
@@ -1728,6 +1751,26 @@ sub write_gnuplot_file {
}
$gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
$gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
+ if ($axis{'xzero'} ne 'off') {
+ $gnuplot_input .= "set xzeroaxis ";
+ if ($axis{'xzero'} eq 'line' || $axis{'xzero'} eq 'thick-line') {
+ $gnuplot_input .= "lt -1 ";
+ if ($axis{'xzero'} eq 'thick-line') {
+ $gnuplot_input .= "lw 3 ";
+ }
+ }
+ $gnuplot_input .= "\n";
+ }
+ if ($axis{'yzero'} ne 'off') {
+ $gnuplot_input .= "set yzeroaxis ";
+ if ($axis{'yzero'} eq 'line' || $axis{'yzero'} eq 'thick-line') {
+ $gnuplot_input .= "lt -1 ";
+ if ($axis{'yzero'} eq 'thick-line') {
+ $gnuplot_input .= "lw 3 ";
+ }
+ }
+ $gnuplot_input .= "\n";
+ }
}
# Key
if (%key) {
@@ -2016,3 +2059,118 @@ sub insert_data {
__END__
+=head1 NAME
+
+Apache::lonplot.pm
+
+=head1 SYNOPSIS
+
+XML-based plotter of graphs
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 SUBROUTINES (parsing and edit rendering)
+
+=over
+
+=item start_gnuplot()
+
+=item end_gnuplot()
+
+=item start_xtics()
+
+=item end_xtics()
+
+=item start_ytics()
+
+=item end_ytics()
+
+=item get_font()
+
+=item start_key()
+
+=item end_key()
+
+=item parse_label()
+
+=item replace_entities()
+
+=item start_title()
+
+=item end_title()
+
+=item start_xlabel()
+
+=item end_xlabel()
+
+=item start_ylabel()
+
+=item end_label()
+
+=item start_curve()
+
+=item end_curve()
+
+=item start_function()
+
+=item end_function()
+
+=item start_data()
+
+=item end_data()
+
+=item start_axis()
+
+=item end_axis
+
+=back
+
+=head1 SUBROUTINES (Utility)
+
+=over
+
+=item set_defaults()
+
+=item get_attributes()
+
+=item write_gnuplot_file()
+
+=item check_inputs()
+
+=item edit_attributes()
+
+=back
+
+=head1 SUBROUTINES (Insertion functions for editing plots)
+
+=over
+
+=item insert_gnuplot()
+
+=item insert_tics()
+
+=item insert_xtics()
+
+=item insert_key()
+
+=item insert_axis()
+
+=item insert_title()
+
+=item insert_xlabel()
+
+=item insert_ylabel()
+
+=item insert_label()
+
+=item insert_curve()
+
+=item insert_function()
+
+=item insert_data()
+
+=back
+
+=cut