--- loncom/xml/lonplot.pm 2001/12/17 21:43:12 1.1 +++ loncom/xml/lonplot.pm 2002/01/08 21:41:20 1.34 @@ -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 1.34 2002/01/08 21:41:20 matthew Exp $ # # Copyright Michigan State University Board of Trustees # @@ -25,186 +25,493 @@ # # http://www.lon-capa.org/ # -# 2/21 Guy +# 12/15/01 Matthew +# 12/17 12/18 12/19 12/20 12/21 12/27 12/28 12/30 12/31 Matthew +# 01/01/02 Matthew +# 01/02 01/03 01/04 Matthew package Apache::lonplot; + use strict; +use Apache::File; use Apache::response; +use Apache::lonxml; +use Apache::edit; -sub BEGIN { +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 ## -## Tests used in checking the validitity of input +## @curves: $curves[$i] = \%curve +## %curve: name, linestyle, ( function | data ) ## -my $int_test = sub {$_[0]=~/^\d+$/}; -my $real_test = sub {$_[0]=~/^[+-]?\d*\.?\d*$/}; -my $color_test = sub {$_[0]=~/^x[\da-f]{6}$/}; +## $curves[$i]->{'data'} = [ [x1,x2,x3,x4], +## [y1,y2,y3,y4] ] +## + +################################################################### +## ## +## 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 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 => [4,6,7], + boxes => 3, + boxerrorbars => [3,4,5], + boxxyerrorbars => [4,6,7], + financebars => 5, + candlesticks => 5, + vector => 2 + ); + +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 $key_pos_test = sub {$_[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 -## +################################################################### +## ## +## Attribute metadata ## +## ## +################################################################### +my @plot_edit_order = + qw/bgcolor fgcolor height width font transparent grid border/; my %plot_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 } + height => { + default => 200, + test => $int_test, + description => 'height of image (pixels)', + edit_type => 'entry' + }, + width => { + default => 200, + test => $int_test, + description => 'width 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 => 'Transparent image', + edit_type => 'on_off' + }, + grid => { + default => 'off', + test => $onoff_test, + description => 'Display grid', + edit_type => 'on_off' + }, + border => { + default => 'on', + test => $onoff_test, + description => 'Draw border around plot', + 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 => "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' + }, + 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 }, - 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' + }, + 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}, - 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 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' + } ); 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' + }, + name => { + default => '', + test => $words_test, + description => 'name of curve to appear in key', + edit_type => 'entry' + }, + linestyle => { + default => 'lines', + test => $linestyle_test, + description => 'Style of the axis lines', + edit_type => 'choice', + choices => ['lines','linespoints','dots','points','steps', + 'fsteps','histeps','errorbars','xerrorbars', + 'yerrorbars','xyerrorbars','boxes','boxerrorbars', + 'boxxyerrorbars','financebars','candlesticks', + 'vector'] + } ); -## -## End of defaults -## +################################################################### +## ## +## parsing and edit rendering ## +## ## +################################################################### my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves); sub start_plot { - %plot = ''; %key=''; %axis=''; - $title=''; $xlabel=''; $ylabel=''; - @labels = ''; @curves=''; + %plot = (); %key = (); %axis = (); + $title = undef; $xlabel = undef; $ylabel = undef; + $#labels = -1; $#curves = -1; + # my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - # - &Apache::lonxml::register('Apache::plot', + &Apache::lonxml::register('Apache::lonplot', ('title','xlabel','ylabel','key','axis','label','curve')); - push (@Apache::lonxml::namespace,'plot'); - &get_attributes(\%plot,\%plot_defaults,$parstack,$safeeval); - return ''; -} - -sub get_attributes{ - %values = %{$_[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} ); + push (@Apache::lonxml::namespace,'lonplot'); + if ($target eq 'web') { + 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,'Plot'); + $result .= &edit_attributes($target,$token,\%plot_defaults, + \@plot_edit_order); + } elsif ($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 ; + return $result; } sub end_plot { my ($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 + &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.'_'.$$.int(rand(1000)).'_plot.data'; + ## Write the plot description to the file + my $fh=Apache::File->new(">$tmpdir$filename"); + print $fh &write_gnuplot_file(); + close($fh); + ## return image tag for the plot + $result .= <<"ENDIMAGE"; +/cgi-bin/plot.gif?$filename +ENDIMAGE + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } + ##----------------------------------------------------------------- key sub start_key { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - &get_attributes(\%key,\%key_defaults,$parstack,$safeeval); + if ($target eq 'web') { + &get_attributes(\%key,\%key_defaults,$parstack,$safeeval, + $tagstack->[-1]); + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Plot Key'); + $result .= &edit_attributes($target,$token,\%key_defaults); + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args + ($token,$parstack,$safeeval,keys(%key_defaults)); + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + $result.= &Apache::edit::handle_insert(); + } + } return $result; } sub end_key { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } + ##------------------------------------------------------------------- title sub start_title { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]); my $result=''; + if ($target eq 'web') { + $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]); + if (length($title) > $max_str_len) { + $title = substr($title,0,$max_str_len); + } + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_start($target,$token,'Plot Title'); + my $text=&Apache::lonxml::get_all_text("/title",$$parser[-1]); + $result.=''. + &Apache::edit::editfield('',$text,'',60,1); + } elsif ($target eq 'modified') { + my $text=$$parser[-1]->get_text("/title"); + $result.=&Apache::edit::modifiedfield($token); + } return $result; } sub end_title { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } ##------------------------------------------------------------------- xlabel sub start_xlabel { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]); + if ($target eq 'web') { + $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]); + if (length($xlabel) > $max_str_len) { + $xlabel = substr($xlabel,0,$max_str_len); + } + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel'); + my $text=&Apache::lonxml::get_all_text("/xlabel",$$parser[-1]); + $result.=''. + &Apache::edit::editfield('',$text,'',60,1); + } elsif ($target eq 'modified') { + my $text=$$parser[-1]->get_text("/xlabel"); + $result.=&Apache::edit::modifiedfield($token); + } return $result; } sub end_xlabel { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } + ##------------------------------------------------------------------- ylabel sub start_ylabel { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]); + if ($target eq 'web') { + $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]); + if (length($ylabel) > $max_str_len) { + $ylabel = substr($ylabel,0,$max_str_len); + } + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel'); + my $text = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]); + $result .= ''. + &Apache::edit::editfield('',$text,'',60,1); + } elsif ($target eq 'modified') { + my $text=$$parser[-1]->get_text("/ylabel"); + $result.=&Apache::edit::modifiedfield($token); + } return $result; } sub end_ylabel { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } + ##------------------------------------------------------------------- label sub start_label { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - my $label = &newhashref(); - &get_attributes($label,\%label_defaults,$parstack,$safeeval); - $label->{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]); - push(@labels,$label); + if ($target eq 'web') { + my %label; + &get_attributes(\%label,\%label_defaults,$parstack,$safeeval, + $tagstack->[-1]); + my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]); + $text = substr($text,0,$max_str_len) if (length($text) > $max_str_len); + $label{'text'} = $text; + push(@labels,\%label); + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Plot Label'); + $result .= &edit_attributes($target,$token,\%label_defaults); + my $text = &Apache::lonxml::get_all_text("/label",$$parser[-1]); + $result .= ''. + &Apache::edit::editfield('',$text,'',60,1); + } 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=$$parser[-1]->get_text("/label"); + $result.=&Apache::edit::modifiedfield($token); + } return $result; } sub end_label { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } @@ -212,19 +519,36 @@ sub end_label { sub start_curve { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - my $curve = &newhashref(); - &get_attributes($curve,\%curve_defaults,$parstack,$safeeval); - push (@curves,$curve); - - &Apache::lonxml::register('Apache::plot',('function','data')); + &Apache::lonxml::register('Apache::lonplot',('function','data')); push (@Apache::lonxml::namespace,'curve'); - + if ($target eq 'web') { + my %curve; + &get_attributes(\%curve,\%curve_defaults,$parstack,$safeeval, + $tagstack->[-1]); + push (@curves,\%curve); + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Curve'); + $result .= &edit_attributes($target,$token,\%curve_defaults); + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args + ($token,$parstack,$safeeval,keys(%label_defaults)); + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + $result.= &Apache::edit::handle_insert(); + } + } return $result; } sub end_curve { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + pop @Apache::lonxml::namespace; + &Apache::lonxml::deregister('Apache::lonplot',('function','data')); + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_end($target,$token); + } return $result; } @@ -232,15 +556,33 @@ sub end_curve { sub start_function { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - - $curves[-1]->{'function'} = - &Apache::lonxml::get_all_text("/function",$$parser[-1]); + if ($target eq 'web') { + if (exists($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",$$parser[-1]); + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Curve Function'); + my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]); + $result .= ''. + &Apache::edit::editfield('',$text,'',60,1); + } elsif ($target eq 'modified') { + # Why do I do this? + my $text=$$parser[-1]->get_text("/function"); + $result.=&Apache::edit::modifiedfield($token); + } return $result; } sub end_function { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result = ''; + if ($target eq 'web') { + } elsif ($target eq 'edit') { + $result .= &Apache::edit::end_table(); + } return $result; } @@ -248,14 +590,60 @@ sub end_function { sub start_data { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - push( @{$curves[-1]->{'data'}}, - &Apache::lonxml::get_all_text("/data",$$parser[-1])); + if ($target eq 'web') { + if (exists($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",$$parser[-1]); + $datatext =~ s/\s+/ /g; + # Need to do some error checking on the @data array - + # make sure it's all numbers and make sure each array + # is of the same length. + my @data; + if ($datatext =~ /,/) { + @data = split /,/,$datatext; + } else { # Assume it's space seperated. + @data = split / /,$datatext; + } + for (my $i=0;$i<=$#data;$i++) { + # Check that it's non-empty + if (! defined($data[$i])) { + &Apache::lonxml::warning( + 'undefined value. Replacing with '. + ' pi/e = 1.15572734979092'); + $data[$i] = 1.15572734979092; + } + # Check that it's a number + if (! &$real_test($data[$i]) & ! &$int_test($data[$i])) { + &Apache::lonxml::warning( + 'Bad value of '.$data[$i].' Replacing with '. + ' pi/e = 1.15572734979092'); + $data[$i] = 1.15572734979092; + } + } + push @{$curves[-1]->{'data'}},\@data; + } elsif ($target eq 'edit') { + $result .= &Apache::edit::tag_start($target,$token,'Curve Data'); + my $text = &Apache::lonxml::get_all_text("/data",$$parser[-1]); + $result .= ''. + &Apache::edit::editfield('',$text,'',60,1); + } 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') { + $result .= &Apache::edit::end_table(); + } return $result; } @@ -263,22 +651,294 @@ sub end_data { sub start_axis { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - &get_attributes(\%axis,\%label_defaults,$parstack,$safeeval); + if ($target eq 'web') { + &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,$token,\%axis_defaults); + } elsif ($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 $result; } sub end_axis { my ($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') { + } 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})) { + $values->{$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,$keys) = @_; + my ($result,@keys); + if ($keys && ref($keys) eq 'ARRAY') { + @keys = @$keys; + } else { + @keys = sort(keys(%$defaults)); + } + foreach my $attr (@keys) { + if ($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'}, + $token); + } elsif ($defaults->{$attr}->{'edit_type'} eq 'on_off') { + $result .= &Apache::edit::select_arg( + $defaults->{$attr}->{'description'}, + $attr, + ['on','off'], + $token); + } + $result .= '
'; + } + 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_title(); + $result .= &insert_xlabel(); + $result .= &insert_ylabel(); + $result .= &insert_curve(); + # 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_title { return " \n"; } +sub insert_xlabel { return " \n"; } +sub insert_ylabel { return " \n"; } + +sub insert_label { + my $result; + $result .= '