--- loncom/xml/lonplot.pm 2001/12/17 21:43:12 1.1
+++ loncom/xml/lonplot.pm 2007/02/21 20:47:49 1.116
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Dynamic plot
#
-# $Id: lonplot.pm,v 1.1 2001/12/17 21:43:12 matthew Exp $
+# $Id: lonplot.pm,v 1.116 2007/02/21 20:47:49 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -25,186 +25,818 @@
#
# http://www.lon-capa.org/
#
-# 2/21 Guy
+
package Apache::lonplot;
+
use strict;
+use warnings FATAL=>'all';
+no warnings 'uninitialized';
+use Apache::File;
use Apache::response;
+use Apache::lonxml;
+use Apache::edit;
+use Apache::lonnet;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+
+
+use vars qw/$weboutputformat $versionstring/;
-sub BEGIN {
- &Apache::lonxml::register('Apache::lonplot',('plot'));
+
+
+BEGIN {
+ &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
+ #
+ # Determine the version of GNUPLOT
+ $weboutputformat = 'gif';
+ $versionstring = `gnuplot --version 2>/dev/null`;
+ if ($versionstring =~ /^gnuplot 4/) {
+ $weboutputformat = 'png';
+ }
+
}
+##
+## Description of data structures:
+##
+## %plot %key %axis
+## --------------------------
+## height title color
+## width box xmin
+## bgcolor pos xmax
+## fgcolor ymin
+## transparent ymax
+## grid
+## border
+## font
+## align
+##
+## @labels: $labels[$i] = \%label
+## %label: text, xpos, ypos, justify
+##
+## @curves: $curves[$i] = \%curve
+## %curve: name, linestyle, ( function | data )
##
-## Tests used in checking the validitity of input
+## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
+## [y1,y2,y3,y4] ]
##
-my $int_test = sub {$_[0]=~/^\d+$/};
-my $real_test = sub {$_[0]=~/^[+-]?\d*\.?\d*$/};
-my $color_test = sub {$_[0]=~/^x[\da-f]{6}$/};
+
+###################################################################
+## ##
+## Tests used in checking the validitity of input ##
+## ##
+###################################################################
+
+my $max_str_len = 50; # if a label, title, xlabel, or ylabel text
+ # is longer than this, it will be truncated.
+
+my %linestyles =
+ (
+ lines => 2, # Maybe this will be used in the future
+ linespoints => 2, # to check on whether or not they have
+ dots => 2, # supplied enough <data></data> fields
+ points => 2, # to use the given line style. But for
+ steps => 2, # now there are more important things
+ fsteps => 2, # for me to deal with.
+ histeps => 2,
+ errorbars => 3,
+ xerrorbars => [3,4],
+ yerrorbars => [3,4],
+ xyerrorbars => [4,6],
+ boxes => 3,
+ filledcurves => 2,
+ vector => 4
+ );
+
+my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
+my $real_test =
+ sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
+my $pos_real_test =
+ sub {$_[0]=~s/\s+//g;$_[0]=~/^[+]?\d*\.?\d*([eE][+-]\d+)?$/};
+my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-fA-F]{6}$/};
my $onoff_test = sub {$_[0]=~/^(on|off)$/};
-my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below)+$/};
+my $key_pos_test = sub {$_[0]=~/^(top|bottom|right|left|outside|below| )+$/};
my $sml_test = sub {$_[0]=~/^(small|medium|large)$/};
-my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};
+my $linestyle_test = sub {exists($linestyles{$_[0]})};
+my $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w~!\@\#\$\%^&\*\(\)-=_\+\[\]\{\}:\;\'<>,\.\/\?\\]+ ?)+$/};
-##
-## Default values for attributes of elements
-##
-my %plot_defaults =
+###################################################################
+## ##
+## Attribute metadata ##
+## ##
+###################################################################
+my @gnuplot_edit_order =
+ qw/alttag bgcolor fgcolor height width font transparent grid samples
+ border align texwidth texfont plotcolor plottype gridtype lmargin rmargin
+ tmargin bmargin major_ticscale minor_ticscale boxwidth gridlayer fillstyle
+ pattern solid/;
+
+my $margin_choices = ['default',0..20];
+
+my %gnuplot_defaults =
(
- height => {default => 200, test => $int_test },
- width => {default => 200, test => $int_test },
- bgcolor => {default => "xffffff", test => $color_test},
- fgcolor => {default => "x000000", test => $color_test},
- transparent => {default => "off", test => $onoff_test},
- grid => {default => "off", test => $onoff_test},
- border => {default => "on" , test => $onoff_test},
- font => {default => "medium", test => $sml_test }
+ alttag => {
+ default => 'dynamically generated plot',
+ test => $words_test,
+ description => 'brief description of the plot',
+ edit_type => 'entry',
+ size => '40'
+ },
+ height => {
+ default => 300,
+ test => $int_test,
+ description => 'height of image (pixels)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ width => {
+ default => 400,
+ test => $int_test,
+ description => 'width of image (pixels)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ bgcolor => {
+ default => 'xffffff',
+ test => $color_test,
+ description => 'background color of image (xffffff)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ fgcolor => {
+ default => 'x000000',
+ test => $color_test,
+ description => 'foreground color of image (x000000)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ transparent => {
+ default => 'off',
+ test => $onoff_test,
+ description => 'Transparent image',
+ edit_type => 'onoff'
+ },
+ grid => {
+ default => 'on',
+ test => $onoff_test,
+ description => 'Display grid',
+ edit_type => 'onoff'
+ },
+ gridlayer => {
+ default => 'off',
+ test => $onoff_test,
+ description => 'Display grid front layer over filled boxes or filled curves',
+ edit_type => 'onoff'
+ },
+ box_border => {
+ default => 'noborder',
+ test => sub {$_[0]=~/^(noborder|border)$/},
+ description => 'Draw border for boxes',
+ edit_type => 'choice',
+ choices => ['border','noborder']
+ },
+ border => {
+ default => 'on',
+ test => $onoff_test,
+ description => 'Draw border around plot',
+ edit_type => 'onoff'
+ },
+ font => {
+ default => 'medium',
+ test => $sml_test,
+ description => 'Size of font to use',
+ edit_type => 'choice',
+ choices => ['small','medium','large']
+ },
+ samples => {
+ default => '100',
+ test => $int_test,
+ description => 'Number of samples for non-data plots',
+ edit_type => 'choice',
+ choices => ['100','200','500','1000','2000','5000']
+ },
+ align => {
+ default => 'middle',
+ test => sub {$_[0]=~/^(left|right|middle|center)$/},
+ description => 'alignment for image in html',
+ edit_type => 'choice',
+ choices => ['left','right','middle']
+ },
+ texwidth => {
+ default => '93',
+ test => $int_test,
+ description => 'Width of plot when printed (mm)',
+ edit_type => 'entry',
+ size => '5'
+ },
+ texfont => {
+ default => '22',
+ test => $int_test,
+ description => 'Font size to use in TeX output (pts):',
+ edit_type => 'choice',
+ choices => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
+ },
+ plotcolor => {
+ default => 'monochrome',
+ test => sub {$_[0]=~/^(monochrome|color|colour)$/},
+ description => 'Color setting for printing:',
+ edit_type => 'choice',
+ choices => [qw/monochrome color colour/],
+ },
+ pattern => {
+ default => '',
+ test => $int_test,
+ description => 'pattern value for boxes:',
+ edit_type => 'choice',
+ choices => [0,1,2,3,4,5,6]
+ },
+ solid => {
+ default => 0,
+ test => $real_test,
+ description => 'The density of fill style for boxes',
+ edit_type => 'entry',
+ size => '5'
+ },
+ fillstyle => {
+ default => 'empty',
+ test => sub {$_[0]=~/^(empty|solid|pattern)$/},
+ description => 'Filled style for boxes:',
+ edit_type => 'choice',
+ choices => ['empty','solid','pattern']
+ },
+ plottype => {
+ default => 'Cartesian',
+ test => sub {$_[0]=~/^(Polar|Cartesian)$/},
+ description => 'Plot type:',
+ edit_type => 'choice',
+ choices => ['Cartesian','Polar']
+ },
+ gridtype => {
+ default => 'Cartesian',
+ test => sub {$_[0]=~/^(Polar|Cartesian)$/},
+ description => 'Grid type:',
+ edit_type => 'choice',
+ choices => ['Cartesian','Polar']
+ },
+ lmargin => {
+ default => 'default',
+ test => sub {$_[0]=~/^(default|\d+)$/},
+ description => 'Left margin width (pts):',
+ edit_type => 'choice',
+ choices => $margin_choices,
+ },
+ rmargin => {
+ default => 'default',
+ test => sub {$_[0]=~/^(default|\d+)$/},
+ description => 'Right margin width (pts):',
+ edit_type => 'choice',
+ choices => $margin_choices,
+ },
+ tmargin => {
+ default => 'default',
+ test => sub {$_[0]=~/^(default|\d+)$/},
+ description => 'Top margin width (pts):',
+ edit_type => 'choice',
+ choices => $margin_choices,
+ },
+ bmargin => {
+ default => 'default',
+ test => sub {$_[0]=~/^(default|\d+)$/},
+ description => 'Bottom margin width (pts):',
+ edit_type => 'choice',
+ choices => $margin_choices,
+ },
+ boxwidth => {
+ default => '',
+ test => $real_test,
+ description => 'width of boxes default auto',
+ edit_type => 'entry',
+ size => '5'
+ },
+ major_ticscale => {
+ default => '1',
+ test => $real_test,
+ description => 'Size of major tic marks (plot coordinates)',
+ edit_type => 'entry',
+ size => '5'
+ },
+ minor_ticscale => {
+ default => '0.5',
+ test => $real_test,
+ description => 'Size of minor tic mark (plot coordinates)',
+ edit_type => 'entry',
+ size => '5'
+ },
);
my %key_defaults =
(
- title => { default => "on" , test => $onoff_test },
- box => { default => "off" , test => $onoff_test },
- pos => { default => "top right" , test => $key_pos_test}
+ title => {
+ default => '',
+ test => $words_test,
+ description => 'Title of key',
+ edit_type => 'entry',
+ size => '40'
+ },
+ box => {
+ default => 'off',
+ test => $onoff_test,
+ description => 'Draw a box around the key?',
+ edit_type => 'onoff'
+ },
+ pos => {
+ default => 'top right',
+ test => $key_pos_test,
+ description => 'position of the key on the plot',
+ edit_type => 'choice',
+ choices => ['top left','top right','bottom left','bottom right',
+ 'outside','below']
+ }
);
my %label_defaults =
(
- xpos => {default => 0, test => $real_test },
- ypos => {default => 0, test => $real_test },
- color => {default => "x000000", test => $color_test },
- justify => {default => "left",
- test => sub {$_[0]=~/^(left|right|center)$/}}
+ xpos => {
+ default => 0,
+ test => $real_test,
+ description => 'x position of label (graph coordinates)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ ypos => {
+ default => 0,
+ test => $real_test,
+ description => 'y position of label (graph coordinates)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ justify => {
+ default => 'left',
+ test => sub {$_[0]=~/^(left|right|center)$/},
+ description => 'justification of the label text on the plot',
+ edit_type => 'choice',
+ choices => ['left','right','center']
+ }
+ );
+
+my @tic_edit_order = ('location','mirror','start','increment','end',
+ 'minorfreq');
+my %tic_defaults =
+ (
+ location => {
+ default => 'border',
+ test => sub {$_[0]=~/^(border|axis)$/},
+ description => 'Location of major tic marks',
+ edit_type => 'choice',
+ choices => ['border','axis']
+ },
+ mirror => {
+ default => 'on',
+ test => $onoff_test,
+ description => 'mirror tics on opposite axis?',
+ edit_type => 'onoff'
+ },
+ start => {
+ default => '-10.0',
+ test => $real_test,
+ description => 'Start major tics at',
+ edit_type => 'entry',
+ size => '10'
+ },
+ increment => {
+ default => '1.0',
+ test => $real_test,
+ description => 'Place a major tic every',
+ edit_type => 'entry',
+ size => '10'
+ },
+ end => {
+ default => ' 10.0',
+ test => $real_test,
+ description => 'Stop major tics at ',
+ edit_type => 'entry',
+ size => '10'
+ },
+ minorfreq => {
+ default => '0',
+ test => $int_test,
+ description => 'Number of minor tics per major tic mark',
+ edit_type => 'entry',
+ size => '10'
+ },
);
+my @axis_edit_order = ('color','xmin','xmax','ymin','ymax');
my %axis_defaults =
(
- color => {default => "x000000", test => $color_test},
- thickness => {default => 1, test => $int_test },
- xmin => {default => -10.0, test => $real_test },
- xmax => {default => 10.0, test => $real_test },
- ymin => {default => -10.0, test => $real_test },
- ymax => {default => 10.0, test => $real_test }
+ color => {
+ default => 'x000000',
+ test => $color_test,
+ description => 'color of grid lines (x000000)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ xmin => {
+ default => '-10.0',
+ test => $real_test,
+ description => 'minimum x-value shown in plot',
+ edit_type => 'entry',
+ size => '10'
+ },
+ xmax => {
+ default => ' 10.0',
+ test => $real_test,
+ description => 'maximum x-value shown in plot',
+ edit_type => 'entry',
+ size => '10'
+ },
+ ymin => {
+ default => '-10.0',
+ test => $real_test,
+ description => 'minimum y-value shown in plot',
+ edit_type => 'entry',
+ size => '10'
+ },
+ ymax => {
+ default => ' 10.0',
+ test => $real_test,
+ description => 'maximum y-value shown in plot',
+ edit_type => 'entry',
+ size => '10'
+ }
);
+my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize','limit');
+
my %curve_defaults =
(
- color => {default => "x000000", test => $color_test },
- name => {default => "x000000", test => sub {$_[0]=~/^[\w ]*$/} },
- linestyle => {default => "lines", test => $linestyle_test }
+ color => {
+ default => 'x000000',
+ test => $color_test,
+ description => 'color of curve (x000000)',
+ edit_type => 'entry',
+ size => '10'
+ },
+ name => {
+ default => '',
+ test => $words_test,
+ description => 'name of curve to appear in key',
+ edit_type => 'entry',
+ size => '20'
+ },
+ linestyle => {
+ default => 'lines',
+ test => $linestyle_test,
+ description => 'Line style',
+ edit_type => 'choice',
+ choices => [keys(%linestyles)]
+ },
+# gnuplots term=gif driver does not handle linewidth :(
+# linewidth => {
+# default => 1,
+# test => $int_test,
+# description => 'Line width (may not apply to all line styles)',
+# edit_type => 'choice',
+# choices => [1,2,3,4,5,6,7,8,9,10]
+# },
+ pointsize => {
+ default => 1,
+ test => $pos_real_test,
+ description => 'point size (may not apply to all line styles)',
+ edit_type => 'entry',
+ size => '5'
+ },
+ pointtype => {
+ default => 1,
+ test => $int_test,
+ description => 'point type (may not apply to all line styles)',
+ edit_type => 'choice',
+ choices => [0,1,2,3,4,5,6]
+ },
+ limit => {
+ default => 'closed',
+ test => sub {$_[0]=~/^(closed|x1|x2|y1|y2)$/},
+ description => 'point to fill -- for filledcurves',
+ edit_type => 'choice',
+ choices => ['closed','x1','x2','y1','y2']
+ },
);
-##
-## End of defaults
-##
-my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
+###################################################################
+## ##
+## parsing and edit rendering ##
+## ##
+###################################################################
+
+undef %Apache::lonplot::plot;
+my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
+
+sub start_gnuplot {
+ undef(%Apache::lonplot::plot); undef(%key); undef(%axis);
+ undef($title); undef($xlabel); undef($ylabel);
+ undef(@labels); undef(@curves);
+ undef(%xtics); undef(%ytics);
+ #
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result='';
+ &Apache::lonxml::register('Apache::lonplot',
+ ('title','xlabel','ylabel','key','axis','label','curve',
+ 'xtics','ytics'));
+ push (@Apache::lonxml::namespace,'lonplot');
+ if ($target eq 'web' || $target eq 'tex') {
+ &get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
+ $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
+ \@gnuplot_edit_order)
+ .&Apache::edit::end_row()
+ .&Apache::edit::start_spanning_row();
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ }
+ }
+ return $result;
+}
-sub start_plot {
- %plot = ''; %key=''; %axis='';
- $title=''; $xlabel=''; $ylabel='';
- @labels = ''; @curves='';
+sub end_gnuplot {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ pop @Apache::lonxml::namespace;
+ &Apache::lonxml::deregister('Apache::lonplot',
+ ('title','xlabel','ylabel','key','axis','label','curve'));
+ my $result = '';
+ my $randnumber;
+ # need to call rand everytime start_script would evaluate, as the
+ # safe space rand number generator and the global rand generator
+ # are not separate
+ if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
+ $target eq 'answer') {
+ $randnumber=int(rand(1000));
+ }
+ if ($target eq 'web' || $target eq 'tex') {
+ &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
+ &write_gnuplot_file($tmpdir,$filename,$target);
+ $filename = &escape($filename);
+ ## return image tag for the plot
+ if ($target eq 'web') {
+ $result .= <<"ENDIMAGE";
+<img src = "/cgi-bin/plot.$weboutputformat?file=$filename.data"
+ width = "$Apache::lonplot::plot{'width'}"
+ height = "$Apache::lonplot::plot{'height'}"
+ align = "$Apache::lonplot::plot{'align'}"
+ alt = "$Apache::lonplot::plot{'alttag'}" />
+ENDIMAGE
+ } elsif ($target eq 'tex') {
+ &Apache::lonxml::debug(" gnuplot wid = $Apache::lonplot::plot{'width'}");
+ &Apache::lonxml::debug(" gnuplot ht = $Apache::lonplot::plot{'height'}");
+ #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 .= '\includegraphics[width='.$Apache::lonplot::plot{'texwidth'}.' mm]{'.&unescape($filename).'.eps}';
+ }
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
+ return $result;
+}
+
+
+##--------------------------------------------------------------- xtics
+sub start_xtics {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- #
- &Apache::lonxml::register('Apache::plot',
- ('title','xlabel','ylabel','key','axis','label','curve'));
- push (@Apache::lonxml::namespace,'plot');
- &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval);
- return '';
+ if ($target eq 'web' || $target eq 'tex') {
+ &get_attributes(\%xtics,\%tic_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'xtics');
+ $result .= &edit_attributes($target,$token,\%tic_defaults,
+ \@tic_edit_order);
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%tic_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ }
+ }
+ return $result;
}
-sub get_attributes{
- %values = %{$_[0]};
- %defaults = %{$_[1]};
- $parstack = $_[2];
- $safeeval = $_[3];
- my $attr;
- foreach $attr (keys %defaults) {
- $values{$attr} = &Apache::lonxml::get_param($attr,$parstack,$safeeval);
- my $test = $defaults{$attr}->{'test'};
- $values{$attr} = (&$test($values{$attr}) ?
- $values{$attr} :
- $defaults{$attr} );
+sub end_xtics {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
}
- return ;
+ return $result;
}
-sub end_plot {
+##--------------------------------------------------------------- ytics
+sub start_ytics {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
- pop @Apache::lonxml::namespace;
- my $result;
- ## Determine filename
- my $filename =
- ## Write the plot description to the file
- ## return image tag for the plot
+ my $result='';
+ if ($target eq 'web' || $target eq 'tex') {
+ &get_attributes(\%ytics,\%tic_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'ytics');
+ $result .= &edit_attributes($target,$token,\%tic_defaults,
+ \@tic_edit_order);
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%tic_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ }
+ }
+ return $result;
+}
+
+sub end_ytics {
+ my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+ my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
+
+
##----------------------------------------------------------------- key
sub start_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- &get_attributes(\%key,\%key_defaults,$parstack,$safeeval);
+ if ($target eq 'web' || $target eq 'tex') {
+ &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Plot Key');
+ $result .= &edit_attributes($target,$token,\%key_defaults);
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%key_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ }
+ }
return $result;
}
sub end_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
+
##------------------------------------------------------------------- title
sub start_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
- $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
my $result='';
+ if ($target eq 'web' || $target eq 'tex') {
+ $title = &Apache::lonxml::get_all_text("/title",$parser,$style);
+ $title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
+ $title =~ s/\n/ /g;
+ if (length($title) > $max_str_len) {
+ $title = substr($title,0,$max_str_len);
+ }
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_start($target,$token,'Plot Title');
+ my $text=&Apache::lonxml::get_all_text("/title",$parser,$style);
+ $result.=&Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/title",$parser);
+ }
return $result;
}
sub end_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
##------------------------------------------------------------------- xlabel
sub start_xlabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
+ if ($target eq 'web' || $target eq 'tex') {
+ $xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
+ $xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
+ $xlabel =~ s/\n/ /g;
+ if (length($xlabel) > $max_str_len) {
+ $xlabel = substr($xlabel,0,$max_str_len);
+ }
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
+ my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
+ $result.=&Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
+ }
return $result;
}
sub end_xlabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
+
##------------------------------------------------------------------- ylabel
sub start_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
+ if ($target eq 'web' || $target eq 'tex') {
+ $ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
+ $ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
+ $ylabel =~ s/\n/ /g;
+ if (length($ylabel) > $max_str_len) {
+ $ylabel = substr($ylabel,0,$max_str_len);
+ }
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
+ my $text = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
+ $result .= &Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
+ }
return $result;
}
sub end_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
+
##------------------------------------------------------------------- label
sub start_label {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- my $label = &newhashref();
- &get_attributes($label,\%label_defaults,$parstack,$safeeval);
- $label->{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
- push(@labels,$label);
+ if ($target eq 'web' || $target eq 'tex') {
+ my %label;
+ &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
+ $text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
+ $text =~ s/\n/ /g;
+ $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
+ $label{'text'} = $text;
+ push(@labels,\%label);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Plot Label');
+ $result .= &edit_attributes($target,$token,\%label_defaults);
+ my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
+ $result .= &Apache::edit::end_row().
+ &Apache::edit::start_spanning_row().
+ &Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ &Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%label_defaults));
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/label",$parser);
+ }
return $result;
}
sub end_label {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
@@ -212,19 +844,40 @@ sub end_label {
sub start_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- my $curve = &newhashref();
- &get_attributes($curve,\%curve_defaults,$parstack,$safeeval);
- push (@curves,$curve);
-
- &Apache::lonxml::register('Apache::plot',('function','data'));
+ &Apache::lonxml::register('Apache::lonplot',('function','data'));
push (@Apache::lonxml::namespace,'curve');
-
+ if ($target eq 'web' || $target eq 'tex') {
+ my %curve;
+ &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ push (@curves,\%curve);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Curve');
+ $result .= &edit_attributes($target,$token,\%curve_defaults,
+ \@curve_edit_order)
+ .&Apache::edit::end_row()
+ .&Apache::edit::start_spanning_row();
+
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%curve_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ $result.= &Apache::edit::handle_insert();
+ }
+ }
return $result;
}
sub end_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ pop @Apache::lonxml::namespace;
+ &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ }
return $result;
}
@@ -232,15 +885,37 @@ sub end_curve {
sub start_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
-
- $curves[-1]->{'function'} =
- &Apache::lonxml::get_all_text("/function",$$parser[-1]);
+ if ($target eq 'web' || $target eq 'tex') {
+ if (exists($curves[-1]->{'data'})) {
+ &Apache::lonxml::warning
+ ('Use of the <b>curve function</b> tag precludes use of '.
+ ' the <b>curve data</b> tag. '.
+ 'The curve data tag will be omitted in favor of the '.
+ 'curve function declaration.');
+ delete $curves[-1]->{'data'} ;
+ }
+ my $function = &Apache::lonxml::get_all_text("/function",$parser,
+ $style);
+ $function = &Apache::run::evaluate($function,$safeeval,$$parstack[-1]);
+ $curves[-1]->{'function'} = $function;
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
+ my $text = &Apache::lonxml::get_all_text("/function",$parser,$style);
+ $result .= &Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/function",$parser);
+ }
return $result;
}
sub end_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::end_table();
+ }
return $result;
}
@@ -248,14 +923,74 @@ sub end_function {
sub start_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- push( @{$curves[-1]->{'data'}},
- &Apache::lonxml::get_all_text("/data",$$parser[-1]));
+ if ($target eq 'web' || $target eq 'tex') {
+ if (exists($curves[-1]->{'function'})) {
+ &Apache::lonxml::warning
+ ('Use of the <b>curve function</b> tag precludes use of '.
+ ' the <b>curve data</b> tag. '.
+ 'The curve function tag will be omitted in favor of the '.
+ 'curve data declaration.');
+ delete($curves[-1]->{'function'});
+ }
+ my $datatext = &Apache::lonxml::get_all_text("/data",$parser,$style);
+ $datatext=&Apache::run::evaluate($datatext,$safeeval,$$parstack[-1]);
+ # Deal with cases where we're given an array...
+ if ($datatext =~ /^\@/) {
+ $datatext = &Apache::run::run('return "'.$datatext.'"',
+ $safeeval,1);
+ }
+ $datatext =~ s/\s+/ /g;
+ # Need to do some error checking on the @data array -
+ # make sure it's all numbers and make sure each array
+ # is of the same length.
+ my @data;
+ if ($datatext =~ /,/) { # comma deliminated
+ @data = split /,/,$datatext;
+ } else { # Assume it's space separated.
+ @data = split / /,$datatext;
+ }
+ for (my $i=0;$i<=$#data;$i++) {
+ # Check that it's non-empty
+ if (! defined($data[$i])) {
+ &Apache::lonxml::warning(
+ 'undefined curve data value. Replacing with '.
+ ' pi/e = 1.15572734979092');
+ $data[$i] = 1.15572734979092;
+ }
+ # Check that it's a number
+ if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
+ &Apache::lonxml::warning(
+ 'Bad curve data value of '.$data[$i].' Replacing with '.
+ ' pi/e = 1.15572734979092');
+ $data[$i] = 1.15572734979092;
+ }
+ }
+ # 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]}})){
+ &Apache::lonxml::warning
+ ('Number of data points is not consistent with previous '.
+ 'number of data points');
+ }
+ push @{$curves[-1]->{'data'}},\@data;
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Comma or space deliminated curve data');
+ my $text = &Apache::lonxml::get_all_text("/data",$parser,$style);
+ $result .= &Apache::edit::editline('',$text,'',60);
+ } elsif ($target eq 'modified') {
+ $result.=&Apache::edit::rebuild_tag($token);
+ $result.=&Apache::edit::modifiedfield("/data",$parser);
+ }
return $result;
}
sub end_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::end_table();
+ }
return $result;
}
@@ -263,22 +998,469 @@ sub end_data {
sub start_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
- &get_attributes(\%axis,\%label_defaults,$parstack,$safeeval);
+ if ($target eq 'web' || $target eq 'tex') {
+ &get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
+ $tagstack->[-1]);
+ } elsif ($target eq 'edit') {
+ $result .= &Apache::edit::tag_start($target,$token,'Plot Axes');
+ $result .= &edit_attributes($target,$token,\%axis_defaults,
+ \@axis_edit_order);
+ } elsif ($target eq 'modified') {
+ my $constructtag=&Apache::edit::get_new_args
+ ($token,$parstack,$safeeval,keys(%axis_defaults));
+ if ($constructtag) {
+ $result = &Apache::edit::rebuild_tag($token);
+ }
+ }
return $result;
}
sub end_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
+ if ($target eq 'web' || $target eq 'tex') {
+ } elsif ($target eq 'edit') {
+ $result.=&Apache::edit::tag_end($target,$token);
+ } elsif ($target eq 'modified') {
+ }
return $result;
}
+###################################################################
+## ##
+## Utility Functions ##
+## ##
+###################################################################
+
+##----------------------------------------------------------- set_defaults
+sub set_defaults {
+ my ($var,$defaults) = @_;
+ my $key;
+ foreach $key (keys(%$defaults)) {
+ $var->{$key} = $defaults->{$key}->{'default'};
+ }
+}
+
##------------------------------------------------------------------- misc
-sub newhashref{
- my %hash;
- return \%hash;
+sub get_attributes{
+ my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
+ foreach my $attr (keys(%{$defaults})) {
+ if ($attr eq 'texwidth' || $attr eq 'texfont') {
+ $values->{$attr} =
+ &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
+ } else {
+ $values->{$attr} =
+ &Apache::lonxml::get_param($attr,$parstack,$safeeval);
+ }
+ if ($values->{$attr} eq '' | !defined($values->{$attr})) {
+ $values->{$attr} = $defaults->{$attr}->{'default'};
+ next;
+ }
+ my $test = $defaults->{$attr}->{'test'};
+ if (! &$test($values->{$attr})) {
+ &Apache::lonxml::warning
+ ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
+ .$defaults->{$attr}->{'default'} );
+ $values->{$attr} = $defaults->{$attr}->{'default'};
+ }
+ }
+ return ;
+}
+
+##------------------------------------------------------- write_gnuplot_file
+sub write_gnuplot_file {
+ my ($tmpdir,$filename,$target)= @_;
+ my $gnuplot_input = '';
+ my $curve;
+ my $pt = $Apache::lonplot::plot{'texfont'};
+ #
+ # Check to be sure we do not have any empty curves
+ my @curvescopy;
+ foreach my $curve (@curves) {
+ if (exists($curve->{'function'})) {
+ if ($curve->{'function'} !~ /^\s*$/) {
+ push(@curvescopy,$curve);
+ }
+ } elsif (exists($curve->{'data'})) {
+ foreach my $data (@{$curve->{'data'}}) {
+ if (scalar(@$data) > 0) {
+ push(@curvescopy,$curve);
+ last;
+ }
+ }
+ }
+ }
+ @curves = @curvescopy;
+ # Collect all the colors
+ my @Colors;
+ push @Colors, $Apache::lonplot::plot{'bgcolor'};
+ push @Colors, $Apache::lonplot::plot{'fgcolor'};
+ push @Colors, (defined($axis{'color'})?$axis{'color'}:$Apache::lonplot::plot{'fgcolor'});
+ foreach $curve (@curves) {
+ push @Colors, ($curve->{'color'} ne '' ?
+ $curve->{'color'} :
+ $Apache::lonplot::plot{'fgcolor'} );
+ }
+ # set term
+ if ($target eq 'web') {
+ $gnuplot_input .= 'set term '.$weboutputformat .' ';
+ $gnuplot_input .= 'transparent ' if ($Apache::lonplot::plot{'transparent'} eq 'on');
+ $gnuplot_input .= $Apache::lonplot::plot{'font'} . ' ';
+ $gnuplot_input .= 'size '.$Apache::lonplot::plot{'width'}.','.$Apache::lonplot::plot{'height'}.' ';
+ $gnuplot_input .= "@Colors\n";
+ # set output
+ $gnuplot_input .= "set output\n";
+ } elsif ($target eq 'tex') {
+ $gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
+ $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
+ &unescape($filename).".eps\"\n";
+ }
+ # cartesian or polar plot?
+ if (lc($Apache::lonplot::plot{'plottype'}) eq 'polar') {
+ $gnuplot_input .= 'set polar'.$/;
+ } else {
+ # Assume Cartesian
+ }
+ # cartesian or polar grid?
+ if (lc($Apache::lonplot::plot{'gridtype'}) eq 'polar') {
+ $gnuplot_input .= 'set grid polar'.$/;
+ } else {
+ # Assume Cartesian
+ }
+ # solid or pattern for boxes?
+ if (lc($Apache::lonplot::plot{'fillstyle'}) eq 'solid') {
+ $gnuplot_input .= 'set style fill solid '.
+ $Apache::lonplot::plot{'solid'}.$Apache::lonplot::plot{'box_border'}.$/;
+ } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'pattern') {
+ $gnuplot_input .= 'set style fill pattern '.$Apache::lonplot::plot{'pattern'}.$Apache::lonplot::plot{'box_border'}.$/;
+ } elsif (lc($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
+ }
+ # margin
+ if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
+ $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
+ }
+ if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
+ $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
+ }
+ if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
+ $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
+ }
+ if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
+ $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
+ }
+ # tic scales
+ $gnuplot_input .= 'set ticscale '.
+ $Apache::lonplot::plot{'major_ticscale'}.' '.$Apache::lonplot::plot{'minor_ticscale'}.$/;
+ #boxwidth
+ if (lc($Apache::lonplot::plot{'boxwidth'}) ne '') {
+ $gnuplot_input .= 'set boxwidth '.$Apache::lonplot::plot{'boxwidth'}.$/;
+ }
+ # gridlayer
+ $gnuplot_input .= 'set grid noxtics noytics front '.$/
+ if ($Apache::lonplot::plot{'gridlayer'} eq 'on');
+
+ # grid
+ $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
+ # border
+ $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
+ 'set border'.$/ :
+ 'set noborder'.$/ );
+ # sampling rate for non-data curves
+ $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
+ # title, xlabel, ylabel
+ # titles
+ if ($target eq 'tex') {
+ $gnuplot_input .= "set title \"$title\" font \"Helvetica,".$pt."pt\"\n" if (defined($title)) ;
+ $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
+ $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
+ } else {
+ $gnuplot_input .= "set title \"$title\" \n" if (defined($title)) ;
+ $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
+ $gnuplot_input .= "set ylabel \"$ylabel\" \n" if (defined($ylabel));
+ }
+ # tics
+ if (%xtics) {
+ $gnuplot_input .= "set xtics $xtics{'location'} ";
+ $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
+ $gnuplot_input .= "$xtics{'start'}, ";
+ $gnuplot_input .= "$xtics{'increment'}, ";
+ $gnuplot_input .= "$xtics{'end'}\n";
+ if ($xtics{'minorfreq'} != 0) {
+ $gnuplot_input .= "set mxtics ".$xtics{'minorfreq'}."\n";
+ }
+ }
+ if (%ytics) {
+ $gnuplot_input .= "set ytics $ytics{'location'} ";
+ $gnuplot_input .= ( $ytics{'mirror'} eq 'on'?"mirror ":"nomirror ");
+ $gnuplot_input .= "$ytics{'start'}, ";
+ $gnuplot_input .= "$ytics{'increment'}, ";
+ $gnuplot_input .= "$ytics{'end'}\n";
+ if ($ytics{'minorfreq'} != 0) {
+ $gnuplot_input .= "set mytics ".$ytics{'minorfreq'}."\n";
+ }
+ }
+ # axis
+ if (%axis) {
+ $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
+ $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
+ }
+ # Key
+ if (%key) {
+ $gnuplot_input .= 'set key '.$key{'pos'}.' ';
+ if ($key{'title'} ne '') {
+ $gnuplot_input .= 'title "'.$key{'title'}.'" ';
+ }
+ $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
+ } else {
+ $gnuplot_input .= 'set nokey'.$/;
+ }
+ # labels
+ my $label;
+ foreach $label (@labels) {
+ $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
+ $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'};
+ if ($target eq 'tex') {
+ $gnuplot_input .=' font "Helvetica,'.$pt.'pt"' ;
+ }
+ $gnuplot_input .= $/;
+ }
+ if ($target eq 'tex') {
+ $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
+ $gnuplot_input .="\n";
+ }
+ # curves
+ $gnuplot_input .= 'plot ';
+ for (my $i = 0;$i<=$#curves;$i++) {
+ $curve = $curves[$i];
+ $gnuplot_input.= ', ' if ($i > 0);
+ if (exists($curve->{'function'})) {
+ $gnuplot_input.=
+ $curve->{'function'}.' title "'.
+ $curve->{'name'}.'" with '.
+ $curve->{'linestyle'};
+ $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
+ if (($curve->{'linestyle'} eq 'points') ||
+ ($curve->{'linestyle'} eq 'linespoints') ||
+ ($curve->{'linestyle'} eq 'errorbars') ||
+ ($curve->{'linestyle'} eq 'xerrorbars') ||
+ ($curve->{'linestyle'} eq 'yerrorbars') ||
+ ($curve->{'linestyle'} eq 'xyerrorbars')) {
+ $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
+ $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
+ } elsif ($curve->{'linestyle'} eq 'filledcurves') {
+ $gnuplot_input.= ' '.$curve->{'limit'};
+ }
+ } elsif (exists($curve->{'data'})) {
+ # Store data values in $datatext
+ my $datatext = '';
+ # get new filename
+ my $datafilename = "$tmpdir/$filename.data.$i";
+ my $fh=Apache::File->new(">$datafilename");
+ # Compile data
+ my @Data = @{$curve->{'data'}};
+ my @Data0 = @{$Data[0]};
+ for (my $i =0; $i<=$#Data0; $i++) {
+ my $dataset;
+ foreach $dataset (@Data) {
+ $datatext .= $dataset->[$i] . ' ';
+ }
+ $datatext .= $/;
+ }
+ # write file
+ print $fh $datatext;
+ close ($fh);
+ # generate gnuplot text
+ $gnuplot_input.= '"'.$datafilename.'" title "'.
+ $curve->{'name'}.'" with '.
+ $curve->{'linestyle'};
+ $gnuplot_input.= ' linewidth 4 ' if ($target eq 'tex');
+ if (($curve->{'linestyle'} eq 'points') ||
+ ($curve->{'linestyle'} eq 'linespoints') ||
+ ($curve->{'linestyle'} eq 'errorbars') ||
+ ($curve->{'linestyle'} eq 'xerrorbars') ||
+ ($curve->{'linestyle'} eq 'yerrorbars') ||
+ ($curve->{'linestyle'} eq 'xyerrorbars')) {
+ $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
+ $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
+ } elsif ($curve->{'linestyle'} eq 'filledcurves') {
+ $gnuplot_input.= ' '.$curve->{'limit'};
+ }
+ }
+ }
+ # Write the output to a file.
+ my $fh=Apache::File->new(">$tmpdir$filename.data");
+ print $fh $gnuplot_input;
+ close($fh);
+ # That's all folks.
+ return ;
+}
+
+#---------------------------------------------- check_inputs
+sub check_inputs {
+ ## Note: no inputs, no outputs - this acts only on global variables.
+ ## Make sure we have all the input we need:
+ if (! %Apache::lonplot::plot) { &set_defaults(\%Apache::lonplot::plot,\%gnuplot_defaults); }
+ if (! %key ) {} # No key for this plot, thats okay
+# if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
+ if (! defined($title )) {} # No title for this plot, thats okay
+ if (! defined($xlabel)) {} # No xlabel for this plot, thats okay
+ if (! defined($ylabel)) {} # No ylabel for this plot, thats okay
+ if ($#labels < 0) { } # No labels for this plot, thats okay
+ if ($#curves < 0) {
+ &Apache::lonxml::warning("No curves specified for plot!!!!");
+ return '';
+ }
+ my $curve;
+ foreach $curve (@curves) {
+ if (!defined($curve->{'function'})&&!defined($curve->{'data'})){
+ &Apache::lonxml::warning("One of the curves specified did not contain any curve data or curve function declarations\n");
+ return '';
+ }
+ }
+}
+
+#------------------------------------------------ make_edit
+sub edit_attributes {
+ my ($target,$token,$defaults,$keys) = @_;
+ my ($result,@keys);
+ if ($keys && ref($keys) eq 'ARRAY') {
+ @keys = @$keys;
+ } else {
+ @keys = sort(keys(%$defaults));
+ }
+ foreach my $attr (@keys) {
+ # append a ' ' to the description if it doesn't have one already.
+ my $description = $defaults->{$attr}->{'description'};
+ $description .= ' ' if ($description !~ / $/);
+ if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
+ $result .= &Apache::edit::text_arg
+ ($description,$attr,$token,
+ $defaults->{$attr}->{'size'});
+ } elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
+ $result .= &Apache::edit::select_or_text_arg
+ ($description,$attr,$defaults->{$attr}->{'choices'},$token);
+ } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
+ $result .= &Apache::edit::select_or_text_arg
+ ($description,$attr,['on','off'],$token);
+ }
+ $result .= '<br />';
+ }
+ return $result;
+}
+
+
+###################################################################
+## ##
+## Insertion functions for editing plots ##
+## ##
+###################################################################
+
+sub insert_gnuplot {
+ my $result = '';
+ # plot attributes
+ $result .= "\n<gnuplot ";
+ foreach my $attr (keys(%gnuplot_defaults)) {
+ $result .= "\n $attr=\"$gnuplot_defaults{$attr}->{'default'}\"";
+ }
+ $result .= ">";
+ # Add the components (most are commented out for simplicity)
+ # $result .= &insert_key();
+ # $result .= &insert_axis();
+ # $result .= &insert_title();
+ # $result .= &insert_xlabel();
+ # $result .= &insert_ylabel();
+ $result .= &insert_curve();
+ # close up the <gnuplot>
+ $result .= "\n</gnuplot>";
+ return $result;
}
+sub insert_tics {
+ my $result;
+ $result .= &insert_xtics() . &insert_ytics;
+ return $result;
+}
+
+sub insert_xtics {
+ my $result;
+ $result .= "\n <xtics ";
+ foreach my $attr (keys(%tic_defaults)) {
+ $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
+ }
+ $result .= "/>";
+ return $result;
+}
+
+sub insert_ytics {
+ my $result;
+ $result .= "\n <ytics ";
+ foreach my $attr (keys(%tic_defaults)) {
+ $result .= "\n $attr=\"$tic_defaults{$attr}->{'default'}\" ";
+ }
+ $result .= "/>";
+ return $result;
+}
+sub insert_key {
+ my $result;
+ $result .= "\n <key ";
+ foreach my $attr (keys(%key_defaults)) {
+ $result .= "\n $attr=\"$key_defaults{$attr}->{'default'}\"";
+ }
+ $result .= " />";
+ return $result;
+}
+
+sub insert_axis{
+ my $result;
+ $result .= "\n <axis ";
+ foreach my $attr (keys(%axis_defaults)) {
+ $result .= "\n $attr=\"$axis_defaults{$attr}->{'default'}\"";
+ }
+ $result .= " />";
+ return $result;
+}
+
+sub insert_title { return "\n <title></title>"; }
+sub insert_xlabel { return "\n <xlabel></xlabel>"; }
+sub insert_ylabel { return "\n <ylabel></ylabel>"; }
+
+sub insert_label {
+ my $result;
+ $result .= "\n <label ";
+ foreach my $attr (keys(%label_defaults)) {
+ $result .= "\n $attr=\"".
+ $label_defaults{$attr}->{'default'}."\"";
+ }
+ $result .= "></label>";
+ return $result;
+}
+
+sub insert_curve {
+ my $result;
+ $result .= "\n <curve ";
+ foreach my $attr (keys(%curve_defaults)) {
+ $result .= "\n $attr=\"".
+ $curve_defaults{$attr}->{'default'}."\"";
+ }
+ $result .= " >";
+ $result .= &insert_data().&insert_data()."\n </curve>";
+}
+
+sub insert_function {
+ my $result;
+ $result .= "\n <function></function>";
+ return $result;
+}
+
+sub insert_data {
+ my $result;
+ $result .= "\n <data></data>";
+ return $result;
+}
+
+##----------------------------------------------------------------------
1;
__END__
+
+