# The LearningOnline Network with CAPA
# Dynamic plot
#
# $Id: lonplot.pm,v 1.23 2001/12/28 19:40:47 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# 12/15/01 Matthew
# 12/17 12/18 12/19 12/20 12/21 12/27 12/28 Matthew
package Apache::lonplot;
use strict;
use Apache::File;
use Apache::response;
use Apache::lonxml;
use Apache::edit;
sub BEGIN {
&Apache::lonxml::register('Apache::lonplot',('plot'));
}
##
## 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 )
##
## $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
## [y1,y2,y3,y4] ]
##
###################################################################
## ##
## Tests used in checking the validitity of input ##
## ##
###################################################################
my $int_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^\d+$/};
my $real_test =
sub {$_[0]=~s/\s+//g;$_[0]=~/^[+-]?\d*\.?\d*([eE][+-]\d+)?$/};
my $color_test = sub {$_[0]=~s/\s+//g;$_[0]=~/^x[\da-f]{6}$/};
my $onoff_test = sub {$_[0]=~/^(on|off)$/};
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 $words_test = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
###################################################################
## ##
## Attribute metadata ##
## ##
###################################################################
my %plot_defaults =
(
height => {
default => 200,
test => $int_test,
description => 'vertical size of image (pixels)',
edit_type => 'entry'
},
width => {
default => 200,
test => $int_test,
description => 'horizontal size of image (pixels)',
edit_type => 'entry'
},
bgcolor => {
default => 'xffffff',
test => $color_test,
description => 'background color of image (xffffff)',
edit_type => 'entry'
},
fgcolor => {
default => 'x000000',
test => $color_test,
description => 'foreground color of image (x000000)',
edit_type => 'entry'
},
transparent => {
default => 'off',
test => $onoff_test,
description => '',
edit_type => 'on_off'
},
grid => {
default => 'off',
test => $onoff_test,
description => '',
edit_type => 'on_off'
},
border => {
default => 'on',
test => $onoff_test,
description => '',
edit_type => 'on_off'
},
font => {
default => 'medium',
test => $sml_test,
description => 'Size of font to use',
edit_type => 'choice',
choices => ['small','medium','large']
},
align => {
default => 'left',
test => sub {$_[0]=~/^(left|right|center)$/},
description => 'alignment for image in html',
edit_type => 'choice',
choices => ['left','right','center']
}
);
my %key_defaults =
(
title => {
default => '',
test => $words_test,
description => 'Title of key',
edit_type => 'entry'
},
box => {
default => 'off',
test => $onoff_test,
description => 'Draw a box around the key?',
edit_type => 'on_off'
},
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,
description => 'x position of label (graph coordinates)',
edit_type => 'entry'
},
ypos => {
default => 0,
test => $real_test,
description => 'y position of label (graph coordinates)',
edit_type => 'entry'
},
justify => {
default => 'left',
test => sub {$_[0]=~/^(left|right|center)$/},
description => 'justification of the label text on the plot',
edit_type => 'choice',
choices => ['left','right','center']
}
);
my %axis_defaults =
(
color => {
default => 'x000000',
test => $color_test,
description => 'color of axes (x000000)',
edit_type => 'entry'
},
xmin => {
default => '-10.0',
test => $real_test,
description => 'minimum x-value shown in plot',
edit_type => 'entry'
},
xmax => {
default => ' 10.0',
test => $real_test,
description => 'maximum x-value shown in plot',
edit_type => 'entry'
},
ymin => {
default => '-10.0',
test => $real_test,
description => 'minimum y-value shown in plot',
edit_type => 'entry'
},
ymax => {
default => ' 10.0',
test => $real_test,
description => 'maximum y-value shown in plot',
edit_type => 'entry'
},
linestyle => {
default => 'points',
test => $linestyle_test,
description => 'Style of the axis lines',
edit_type => 'choice',
choices => ['lines','linespoints','dots','points']
}
);
my %curve_defaults =
(
color => {
default => 'x000000',
test => $color_test,
description => 'color of curve (x000000)',
edit_type => 'entry'
},
name => {
default => '',
test => $words_test,
description => 'name of curve to appear in key',
edit_type => 'entry'
},
linestyle => {
default => 'lines',
test => $linestyle_test,
description => 'Style of the axis lines',
edit_type => 'choice',
choices => ['lines','linespoints','dots','points','steps']
}
);
###################################################################
## ##
## parsing and edit rendering ##
## ##
###################################################################
my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);
sub start_plot {
%plot = (); %key = (); %axis = ();
$title = undef; $xlabel = undef; $ylabel = undef;
$#labels = -1; $#curves = -1;
#
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
&Apache::lonxml::register('Apache::lonplot',
('title','xlabel','ylabel','key','axis','label','curve'));
push (@Apache::lonxml::namespace,'plot');
## Always evaluate the insides of the tags
my $inside = &Apache::lonxml::get_all_text("/plot",$$parser[-1]);
$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
&Apache::lonxml::newparser($parser,\$inside);
##-------------------------------------------------------
&get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval,
$tagstack->[-1]);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &edit_attributes($target,$token,\%plot_defaults);
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args
($token,$parstack,$safeeval,keys %plot_defaults);
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
$result.= &Apache::edit::handle_insert();
}
}
return $result;
}
sub end_plot {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
pop @Apache::lonxml::namespace;
&Apache::lonxml::deregister('Apache::lonplot',
('title','xlabel','ylabel','key','axis','label','curve'));
my $result = '';
if ($target eq 'web') {
&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.'_'.$$.'_plot.data';
## Write the plot description to the file
my $fh=Apache::File->new(">$tmpdir$filename");
print $fh &write_gnuplot_file();
close($fh);
## return image tag for the plot
$result .= <<"ENDIMAGE";
ENDIMAGE
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
}
return $result;
}
##----------------------------------------------------------------- key
sub start_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
&get_attributes(\%key,\%key_defaults,$parstack,$safeeval,
$tagstack->[-1]);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &edit_attributes($target,$token,\%key_defaults);
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args
($token,$parstack,$safeeval,keys %key_defaults);
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
$result.= &Apache::edit::handle_insert();
}
}
return $result;
}
sub end_key {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
}
return $result;
}
##------------------------------------------------------------------- title
sub start_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
$title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]);
$result.='
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
my $text=$$parser[-1]->get_text("/function");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_title {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} 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 $result='';
if ($target eq 'web') {
$xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);
$result.='
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
my $text=$$parser[-1]->get_text("/function");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_xlabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
}
return $result;
}
##------------------------------------------------------------------- ylabel
sub start_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
$ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);
$result .= '
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
my $text=$$parser[-1]->get_text("/function");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_ylabel {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} 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 $result='';
if ($target eq 'web') {
my %label;
&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
$tagstack->[-1]);
$label{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
if (! &$words_test($label{'text'})) {
# I should probably warn about it, too.
$label{'text'} = 'Illegal text';
}
push(@labels,\%label);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &edit_attributes($target,$token,\%label_defaults);
my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]);
$result .= '
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args
($token,$parstack,$safeeval,keys %label_defaults);
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
$result.= &Apache::edit::handle_insert();
}
my $text=$$parser[-1]->get_text("/label");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_label {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
}
return $result;
}
##------------------------------------------------------------------- curve
sub start_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
my %curve;
&get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval,
$tagstack->[-1]);
push (@curves,\%curve);
&Apache::lonxml::register('Apache::lonplot',('function','data'));
push (@Apache::lonxml::namespace,'curve');
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &edit_attributes($target,$token,\%curve_defaults);
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args
($token,$parstack,$safeeval,keys %label_defaults);
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
$result.= &Apache::edit::handle_insert();
}
}
return $result;
}
sub end_curve {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
pop @Apache::lonxml::namespace;
&Apache::lonxml::deregister('Apache::lonplot',('function','data'));
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
}
return $result;
}
##------------------------------------------------------------ curve function
sub start_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
if (exists($curves[-1]->{'data'})) {
&Apache::lonxml::warning('Use of precludes use of . The will be omitted in favor of the declaration.');
delete $curves[-1]->{'data'} ;
}
$curves[-1]->{'function'} =
&Apache::lonxml::get_all_text("/function",$$parser[-1]);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
$result .= '
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
# Why do I do this?
my $text=$$parser[-1]->get_text("/function");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_function {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
}
return $result;
}
##------------------------------------------------------------ curve data
sub start_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
if (exists($curves[-1]->{'function'})) {
&Apache::lonxml::warning('Use of precludes use of .'.
'. The will be omitted in favor of '.
'the declaration.');
delete($curves[-1]->{'function'});
}
my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
$datatext =~ s/\s+/ /g;
# Need to do some error checking on the @data array -
# make sure it's all numbers and make sure each array
# is of the same length.
my @data;
if ($datatext =~ /,/) {
@data = split /,/,$datatext;
} else { # Assume it's space seperated.
@data = split / /,$datatext;
}
for (my $i=0;$i<=$#data;$i++) {
# Check that it's non-empty
if (! defined($data[$i])) {
&Apache::lonxml::warning(
'undefined value. Replacing with '.
' pi/e = 1.15572734979092');
$data[$i] = 1.15572734979092;
}
# Check that it's a number
if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) {
&Apache::lonxml::warning(
'Bad value of '.$data[$i].' Replacing with '.
' pi/e = 1.15572734979092');
$data[$i] = 1.15572734979092;
}
}
push @{$curves[-1]->{'data'}},\@data;
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]);
$result .= '
'.
&Apache::edit::editfield('',$text,'',20,1).
&Apache::edit::end_table();
} elsif ($target eq 'modified') {
my $text=$$parser[-1]->get_text("/data");
$result.=&Apache::edit::modifiedfield($token);
}
return $result;
}
sub end_data {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
}
return $result;
}
##------------------------------------------------------------------- axis
sub start_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web') {
&get_attributes(\%axis,\%axis_defaults,$parstack,$safeeval,
$tagstack->[-1]);
} elsif ($target eq 'edit') {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &edit_attributes($target,$token,\%axis_defaults);
} elsif ($target eq 'modified') {
}
return $result;
}
sub end_axis {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web') {
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_end($target,$token);
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args
($token,$parstack,$safeeval,keys %axis_defaults);
if ($constructtag) {
$result = &Apache::edit::rebuild_tag($token);
$result.= &Apache::edit::handle_insert();
}
}
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 get_attributes{
my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
foreach my $attr (keys %{$defaults}) {
$values->{$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 $gnuplot_input = '';
my $curve;
# Collect all the colors
my @Colors;
push @Colors, $plot{'bgcolor'};
push @Colors, $plot{'fgcolor'};
push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
foreach $curve (@curves) {
push @Colors, ($curve->{'color'} ne '' ?
$curve->{'color'} :
$plot{'fgcolor'} );
}
# set term
$gnuplot_input .= 'set term gif ';
$gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
$gnuplot_input .= $plot{'font'} . ' ';
$gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
$gnuplot_input .= "@Colors\n";
# grid
$gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
# border
$gnuplot_input .= ($plot{'border'} eq 'on'?
'set border'.$/ :
'set noborder'.$/ ); # title, xlabel, ylabel
$gnuplot_input .= "set output\n";
$gnuplot_input .= "set title \"$title\"\n" if (defined($title)) ;
$gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
$gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
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'}.' '.$label->{'justify'}.$/ ;
}
# curves
$gnuplot_input .= 'plot ';
my $datatext = '';
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 '.
$curve->{'linestyle'};
} elsif (exists($curve->{'data'})) {
$gnuplot_input.= '\'-\' title "'.
$curve->{'name'}.'" with '.
$curve->{'linestyle'};
my @Data = @{$curve->{'data'}};
my @Data0 = @{$Data[0]};
for (my $i =0; $i<=$#Data0; $i++) {
my $dataset;
foreach $dataset (@Data) {
$datatext .= $dataset->[$i] . ' ';
}
$datatext .= $/;
}
$datatext .=$/;
}
}
$gnuplot_input .= $/.$datatext;
return $gnuplot_input;
}
#---------------------------------------------- check_inputs
sub check_inputs {
## Note: no inputs, no outputs - this acts only on global variables.
## Make sure we have all the input we need:
if (! %plot) { &set_defaults(\%plot,\%plot_defaults); }
if (! %key ) {} # No key for this plot, thats okay
if (! %axis) { &set_defaults(\%axis,\%axis_defaults); }
if (! defined($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($curve->{'data'})){
&Apache::lonxml::warning("One of the curves specified did not contain any or declarations\n");
return '';
}
}
}
#------------------------------------------------ make_edit
sub edit_attributes {
my ($target,$token,$defaults) = @_;
my $result;
foreach my $attr (%$defaults) {
if ($defaults->{$attr}->{'edit_type'} eq 'entry') {
$result .= &Apache::edit::text_arg(
$defaults->{$attr}->{'description'},
$attr,
$token);
} elsif ($defaults->{$attr}->{'edit_type'} eq 'choice') {
$result .= &Apache::edit::select_arg(
$defaults->{$attr}->{'description'},
$attr,
$defaults->{$attr}->{'choices'},
$token);
}
}
return $result;
}
###################################################################
## ##
## Insertion functions for editing plots ##
## ##
###################################################################
#------------------------------------------------ insert_xxxxxxx
sub insert_plot {
my $result;
# plot attributes
$result .= '{'default'}.
"\"\n";
}
$result .= ">\n";
# Add the components
$result .= &insert_key();
$result .= &insert_axis();
$result .= &insert_label();
$result .= &insert_curve();
$result .= &insert_function();
$result .= "\n";
$result .= &insert_curve();
$result .= &insert_data();
$result .= "\n";
# close up the
$result .= "\n";
return $result;
}
sub insert_key {
my $result;
$result .= ' {'default'}.
"\"\n";
}
$result .= " />\n";
return $result;
}
sub insert_axis{
my $result;
$result .= ' {'default'}.
"\"\n";
}
$result .= " />\n";
return $result;
}
sub insert_label {
my $result;
$result .= ' \n";
return $result;
}
sub insert_curve {
my $result;
$result .= ' {'default'}."\"\n";
}
$result .= " >\n";
}
sub insert_function {
my $result;
$result .= "\n";
return $result;
}
sub insert_data {
my $result;
$result .= " \n";
$result .= " \n";
return $result;
}
##----------------------------------------------------------------------
1;
__END__