--- loncom/xml/lonplot.pm	2005/04/07 06:56:27	1.106
+++ loncom/xml/lonplot.pm	2007/06/07 23:42:14	1.118
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Dynamic plot
 #
-# $Id: lonplot.pm,v 1.106 2005/04/07 06:56:27 albertel Exp $
+# $Id: lonplot.pm,v 1.118 2007/06/07 23:42:14 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,9 +36,14 @@ 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/;
 
+
+
 BEGIN {
     &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
     #
@@ -48,8 +53,10 @@ BEGIN {
     if ($versionstring =~ /^gnuplot 4/) {
         $weboutputformat = 'png';
     }
+    
 }
 
+
 ## 
 ## Description of data structures:
 ##
@@ -98,6 +105,7 @@ my %linestyles =
      yerrorbars	    => [3,4],
      xyerrorbars    => [4,6],
      boxes          => 3,
+     filledcurves   => 2,
      vector	    => 4
     );		    
 
@@ -120,8 +128,9 @@ my $words_test     = sub {$_[0]=~s/\s+/
 ###################################################################
 my @gnuplot_edit_order = 
     qw/alttag bgcolor fgcolor height width font transparent grid samples 
-    border align texwidth texfont plotcolor plottype lmargin rmargin tmargin
-    bmargin major_ticscale minor_ticscale/;
+    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];
 
@@ -174,6 +183,19 @@ my %gnuplot_defaults =
 	 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, 
@@ -187,7 +209,7 @@ my %gnuplot_defaults =
 	 edit_type   => 'choice',
 	 choices     => ['small','medium','large']
 	 },
-     samples         => {
+     samples      => {
 	 default     => '100',
 	 test        => $int_test,
 	 description => 'Number of samples for non-data plots',
@@ -195,11 +217,11 @@ my %gnuplot_defaults =
 	 choices     => ['100','200','500','1000','2000','5000']
 	 },
      align        => {
-	 default     => 'center',
-	 test        => sub {$_[0]=~/^(left|right|center)$/},
+	 default     => 'middle',
+	 test        => sub {$_[0]=~/^(left|right|middle|center)$/},
 	 description => 'alignment for image in html',
 	 edit_type   => 'choice',
-	 choices     => ['left','right','center']
+	 choices     => ['left','right','middle']
 	 },
      texwidth     => {
          default     => '93',
@@ -208,55 +230,90 @@ my %gnuplot_defaults =
          edit_type   => 'entry',
          size        => '5'
          },
-     texfont     => {
+     texfont      => {
          default     => '22',
          test        => $int_test,
          description => 'Font size to use in TeX output (pts):',
          edit_type   => 'choice',
          choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
          },
-     plotcolor   => {
+     plotcolor    => {
          default     => 'monochrome',
          test        => sub {$_[0]=~/^(monochrome|color|colour)$/},
          description => 'Color setting for printing:',
          edit_type   => 'choice',
          choices     => [qw/monochrome color colour/],
          },
-     plottype  => {
+     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)$/},
 	 description => 'Plot type:',
 	 edit_type   => 'choice',
          choices     => ['Cartesian','Polar']
          },
-     lmargin   => {
+     gridtype     => {
+	 default     => 'Cartesian',
+	 test        => sub {$_[0]=~/^(Polar|Cartesian|Linear-Log|Log-Linear|Log-Log)$/},
+	 description => 'Grid type:',
+	 edit_type   => 'choice',
+         choices     => ['Cartesian','Polar','Linear-Log','Log-Linear','Log-Log']
+         },
+     lmargin      => {
 	 default     => 'default',
 	 test        => sub {$_[0]=~/^(default|\d+)$/},
 	 description => 'Left margin width (pts):',
 	 edit_type   => 'choice',
          choices     => $margin_choices,
          },
-     rmargin   => {
+     rmargin      => {
 	 default     => 'default',
 	 test        => sub {$_[0]=~/^(default|\d+)$/},
 	 description => 'Right margin width (pts):',
 	 edit_type   => 'choice',
          choices     => $margin_choices,
          },
-     tmargin   => {
+     tmargin      => {
 	 default     => 'default',
 	 test        => sub {$_[0]=~/^(default|\d+)$/},
 	 description => 'Top margin width (pts):',
 	 edit_type   => 'choice',
          choices     => $margin_choices,
          },
-     bmargin   => {
+     bmargin      => {
 	 default     => 'default',
 	 test        => sub {$_[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,
@@ -410,7 +467,7 @@ my %axis_defaults =
 	 }
      );
 
-my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
+my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize','limit');
 
 my %curve_defaults = 
     (
@@ -456,7 +513,14 @@ my %curve_defaults =
          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']
+         },
      );
 
 ###################################################################
@@ -464,10 +528,12 @@ my %curve_defaults =
 ##                    parsing and edit rendering                 ##
 ##                                                               ##
 ###################################################################
-my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
+
+undef %Apache::lonplot::plot;
+my (%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
 
 sub start_gnuplot {
-    undef(%plot);   undef(%key);    undef(%axis);
+    undef(%Apache::lonplot::plot);   undef(%key);    undef(%axis);
     undef($title);  undef($xlabel); undef($ylabel);
     undef(@labels); undef(@curves);
     undef(%xtics);  undef(%ytics);
@@ -479,12 +545,14 @@ sub start_gnuplot {
 	      'xtics','ytics'));
     push (@Apache::lonxml::namespace,'lonplot');
     if ($target eq 'web' || $target eq 'tex') {
-	&get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
+	&get_attributes(\%Apache::lonplot::plot,\%gnuplot_defaults,$parstack,$safeeval,
 			$tagstack->[-1]);
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
 	$result .= &edit_attributes($target,$token,\%gnuplot_defaults,
-				    \@gnuplot_edit_order);
+				    \@gnuplot_edit_order)
+	    .&Apache::edit::end_row()
+	    .&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args
 	    ($token,$parstack,$safeeval,keys(%gnuplot_defaults));
@@ -518,20 +586,24 @@ sub end_gnuplot {
 	    '_'.time.'_'.$$.$randnumber.'_plot';
 	## Write the plot description to the file
 	&write_gnuplot_file($tmpdir,$filename,$target);
-	$filename = &Apache::lonnet::escape($filename);
+	$filename = &escape($filename);
 	## return image tag for the plot
 	if ($target eq 'web') {
 	    $result .= <<"ENDIMAGE";
-<img src    = "/cgi-bin/plot.gif?file=$filename.data&output=$weboutputformat" 
-     width  = "$plot{'width'}"
-     height = "$plot{'height'}"
-     align  = "$plot{'align'}"
-     alt    = "$plot{'alttag'}" />
+<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 = '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$plot{'texwidth'}.' mm]{'.&Apache::lonnet::unescape($filename).'.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);
@@ -638,7 +710,7 @@ sub start_title {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     if ($target eq 'web' || $target eq 'tex') {
-	$title = &Apache::lonxml::get_all_text("/title",$parser);
+	$title = &Apache::lonxml::get_all_text("/title",$parser,$style);
 	$title=&Apache::run::evaluate($title,$safeeval,$$parstack[-1]);
 	$title =~ s/\n/ /g;
 	if (length($title) > $max_str_len) {
@@ -646,10 +718,8 @@ sub start_title {
 	}
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Title');
-	my $text=&Apache::lonxml::get_all_text("/title",$parser);
-	$result.=&Apache::edit::end_row().
-	    &Apache::edit::start_spanning_row().
-	    &Apache::edit::editline('',$text,'',60);
+	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);
@@ -671,7 +741,7 @@ sub start_xlabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     if ($target eq 'web' || $target eq 'tex') {
-	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser);
+	$xlabel = &Apache::lonxml::get_all_text("/xlabel",$parser,$style);
 	$xlabel=&Apache::run::evaluate($xlabel,$safeeval,$$parstack[-1]);
 	$xlabel =~ s/\n/ /g;
 	if (length($xlabel) > $max_str_len) {
@@ -679,10 +749,8 @@ sub start_xlabel {
 	}
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token,'Plot Xlabel');
-	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser);
-	$result.=&Apache::edit::end_row().
-	    &Apache::edit::start_spanning_row().
-	    &Apache::edit::editline('',$text,'',60);
+	my $text=&Apache::lonxml::get_all_text("/xlabel",$parser,$style);
+	$result.=&Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {
 	$result.=&Apache::edit::rebuild_tag($token);	
 	$result.=&Apache::edit::modifiedfield("/xlabel",$parser);
@@ -705,7 +773,7 @@ sub start_ylabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     if ($target eq 'web' || $target eq 'tex') {
-	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser);
+	$ylabel = &Apache::lonxml::get_all_text("/ylabel",$parser,$style);
 	$ylabel = &Apache::run::evaluate($ylabel,$safeeval,$$parstack[-1]);
 	$ylabel =~ s/\n/ /g;
 	if (length($ylabel) > $max_str_len) {
@@ -713,10 +781,8 @@ sub start_ylabel {
 	}
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Ylabel');
-	my $text = &Apache::lonxml::get_all_text("/ylabel",$parser);
-	$result .= &Apache::edit::end_row().
-	    &Apache::edit::start_spanning_row().
-	    &Apache::edit::editline('',$text,'',60);
+	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);
@@ -742,7 +808,7 @@ sub start_label {
 	my %label;
 	&get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
 		    $tagstack->[-1]);
-	my $text = &Apache::lonxml::get_all_text("/label",$parser);
+	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
 	$text = &Apache::run::evaluate($text,$safeeval,$$parstack[-1]);
 	$text =~ s/\n/ /g;
 	$text = substr($text,0,$max_str_len) if (length($text) > $max_str_len);
@@ -751,7 +817,7 @@ sub start_label {
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Plot Label');
 	$result .= &edit_attributes($target,$token,\%label_defaults);
-	my $text = &Apache::lonxml::get_all_text("/label",$parser);
+	my $text = &Apache::lonxml::get_all_text("/label",$parser,$style);
 	$result .= &Apache::edit::end_row().
 	    &Apache::edit::start_spanning_row().
 	    &Apache::edit::editline('',$text,'',60);
@@ -788,13 +854,15 @@ sub start_curve {
     } elsif ($target eq 'edit') {
 	$result .= &Apache::edit::tag_start($target,$token,'Curve');
 	$result .= &edit_attributes($target,$token,\%curve_defaults,
-                                    \@curve_edit_order);
+                                    \@curve_edit_order)
+	    .&Apache::edit::end_row()
+	    .&Apache::edit::start_spanning_row();
+
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args
 	    ($token,$parstack,$safeeval,keys(%curve_defaults));
 	if ($constructtag) {
 	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.= &Apache::edit::handle_insert();
 	}
     }
     return $result;
@@ -825,15 +893,14 @@ sub start_function {
                  'curve function declaration.');
 	    delete $curves[-1]->{'data'} ;
 	}
-        my $function = &Apache::lonxml::get_all_text("/function",$parser);
+        my $function = &Apache::lonxml::get_all_text("/function",$parser,
+						     $style);
 	$function = &Apache::run::evaluate($function,$safeeval,$$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);
-	$result .= &Apache::edit::end_row().
-	    &Apache::edit::start_spanning_row().
-	    &Apache::edit::editline('',$text,'',60);
+	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);
@@ -864,7 +931,7 @@ sub start_data {
                  'curve data declaration.');
 	    delete($curves[-1]->{'function'});
 	}
-	my $datatext = &Apache::lonxml::get_all_text("/data",$parser);
+	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 ($datatext =~ /^\@/) {
@@ -907,10 +974,8 @@ sub start_data {
 	push  @{$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);
-	$result .= &Apache::edit::end_row().
-	    &Apache::edit::start_spanning_row().
-	    &Apache::edit::editline('',$text,'',60);
+	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);
@@ -1006,7 +1071,7 @@ sub write_gnuplot_file {
     my ($tmpdir,$filename,$target)= @_;
     my $gnuplot_input = '';
     my $curve;
-    my $pt = $plot{'texfont'};
+    my $pt = $Apache::lonplot::plot{'texfont'};
     #
     # Check to be sure we do not have any empty curves
     my @curvescopy;
@@ -1027,58 +1092,87 @@ sub write_gnuplot_file {
     @curves = @curvescopy;
     # Collect all the colors
     my @Colors;
-    push @Colors, $plot{'bgcolor'};
-    push @Colors, $plot{'fgcolor'}; 
-    push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
+    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'}       : 
-		       $plot{'fgcolor'}        );
+		       $Apache::lonplot::plot{'fgcolor'}        );
     }
     # set term
     if ($target eq 'web') {
 	$gnuplot_input .= 'set term '.$weboutputformat .' ';
-	$gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
-	$gnuplot_input .= $plot{'font'} . ' ';
-	$gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
+	$gnuplot_input .= 'transparent ' if ($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 $plot{'plotcolor'} solid \"Helvetica\" $pt \n";
+	$gnuplot_input .= "set term postscript eps $Apache::lonplot::plot{'plotcolor'} solid \"Helvetica\" $pt \n";
 	$gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
-	    &Apache::lonnet::unescape($filename).".eps\"\n";
+	    &unescape($filename).".eps\"\n";
     }
-    # cartesian or polar?
-    if (lc($plot{'plottype'}) eq 'polar') {
+    # 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') {
+        $gnuplot_input .= 'set grid polar'.$/;
+    } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'linear-log') {
+        $gnuplot_input .= 'set logscale x'.$/;
+    } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-linear') {
+        $gnuplot_input .= 'set logscale y'.$/;
+    } elsif (lc($Apache::lonplot::plot{'gridtype'}) eq 'log-log') {
+        $gnuplot_input .= 'set logscale x'.$/;
+        $gnuplot_input .= 'set logscale y'.$/;
+    } 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($Apache::lonplot::plot{'fillstyle'}) eq 'empty') {
+    }
     # margin
-    if (lc($plot{'lmargin'}) ne 'default') {
-        $gnuplot_input .= 'set lmargin '.$plot{'lmargin'}.$/;
+    if (lc($Apache::lonplot::plot{'lmargin'}) ne 'default') {
+        $gnuplot_input .= 'set lmargin '.$Apache::lonplot::plot{'lmargin'}.$/;
     }
-    if (lc($plot{'rmargin'}) ne 'default') {
-        $gnuplot_input .= 'set rmargin '.$plot{'rmargin'}.$/;
+    if (lc($Apache::lonplot::plot{'rmargin'}) ne 'default') {
+        $gnuplot_input .= 'set rmargin '.$Apache::lonplot::plot{'rmargin'}.$/;
     }
-    if (lc($plot{'tmargin'}) ne 'default') {
-        $gnuplot_input .= 'set tmargin '.$plot{'tmargin'}.$/;
+    if (lc($Apache::lonplot::plot{'tmargin'}) ne 'default') {
+        $gnuplot_input .= 'set tmargin '.$Apache::lonplot::plot{'tmargin'}.$/;
     }
-    if (lc($plot{'bmargin'}) ne 'default') {
-        $gnuplot_input .= 'set bmargin '.$plot{'bmargin'}.$/;
+    if (lc($Apache::lonplot::plot{'bmargin'}) ne 'default') {
+        $gnuplot_input .= 'set bmargin '.$Apache::lonplot::plot{'bmargin'}.$/;
     }
     # tic scales
     $gnuplot_input .= 'set ticscale '.
-        $plot{'major_ticscale'}.' '.$plot{'minor_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 ($plot{'grid'} eq 'on');
+    $gnuplot_input .= 'set grid'.$/ if ($Apache::lonplot::plot{'grid'} eq 'on');
     # border
-    $gnuplot_input .= ($plot{'border'} eq 'on'?
+    $gnuplot_input .= ($Apache::lonplot::plot{'border'} eq 'on'?
 		       'set border'.$/           :
 		       'set noborder'.$/         );
     # sampling rate for non-data curves
-    $gnuplot_input .= "set samples $plot{'samples'}\n";
+    $gnuplot_input .= "set samples $Apache::lonplot::plot{'samples'}\n";
     # title, xlabel, ylabel
     # titles
     if ($target eq 'tex') {
@@ -1137,7 +1231,7 @@ sub write_gnuplot_file {
         $gnuplot_input .= $/;
     }
     if ($target eq 'tex') {
-        $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
+        $gnuplot_input .="set size 1,".$Apache::lonplot::plot{'height'}/$Apache::lonplot::plot{'width'}*1.38;
         $gnuplot_input .="\n";
         }
     # curves
@@ -1159,6 +1253,8 @@ sub write_gnuplot_file {
                 ($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 $datatext
@@ -1192,6 +1288,8 @@ sub write_gnuplot_file {
                 ($curve->{'linestyle'} eq 'xyerrorbars')) {
                 $gnuplot_input.=' pointtype '.$curve->{'pointtype'};
                 $gnuplot_input.=' pointsize '.$curve->{'pointsize'};
+            } elsif ($curve->{'linestyle'} eq 'filledcurves') { 
+                $gnuplot_input.= ' '.$curve->{'limit'};
             }
 	}
     }
@@ -1207,7 +1305,7 @@ sub write_gnuplot_file {
 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,\%gnuplot_defaults); }
+    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