[BACK]Return to lonplot.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / xml

Diff for /loncom/xml/lonplot.pm between versions 1.8 and 1.48

version 1.8, 2001/12/19 19:22:52 version 1.48, 2002/02/06 10:24:55
Line 26 Line 26
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 12/15/01 Matthew  # 12/15/01 Matthew
 # 12/18 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 01/07 01/08 01/09 Matthew
   # 01/21 02/05 Matthew
   
 package Apache::lonplot;  package Apache::lonplot;
   
 use strict;  use strict;
   use Apache::File;
 use Apache::response;  use Apache::response;
 use Apache::lonxml;  use Apache::lonxml;
 use Digest::MD5  qw(md5 md5_hex md5_base64);  use Apache::edit;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::lonplot',('plot'));    &Apache::lonxml::register('Apache::lonplot',('gnuplot'));
 }  }
   
   ## 
   ## Description of data structures:
 ##  ##
 ## Tests used in checking the validitity of input  ##  %plot       %key    %axis
   ## --------------------------
   ##  height      title   color
   ##  width       box     xmin
   ##  bgcolor     pos     xmax
   ##  fgcolor             ymin
   ##  transparent         ymax
   ##  grid
   ##  border
   ##  font
   ##  align
 ##  ##
 my $int_test       = sub {$_[0]=~/^\d+$/};  ##  @labels: $labels[$i] = \%label
 my $real_test      = sub {$_[0]=~/^[+-]?\d*\.?\d*$/};  ##           %label: text, xpos, ypos, justify
 my $color_test     = sub {$_[0]=~/^x[\da-f]{6}$/};  ##
 my $onoff_test     = sub {$_[0]=~/^(on|off)$/};  ##  @curves: $curves[$i] = \%curve
 my $key_pos_test   = sub {$_[0]=~/^(top|bottom|right|left|outside|below)+$/};  ##           %curve: name, linestyle, ( function | data )
 my $sml_test       = sub {$_[0]=~/^(small|medium|large)$/};  
 my $linestyle_test = sub {$_[0]=~/^(lines|linespoints|dots|points|steps)$/};  
 my $words_test     = sub {$_[0]=~/^((\w+\b*)+$/};  
 ##  ##
 ## Default values for attributes of elements  ##  $curves[$i]->{'data'} = [ [x1,x2,x3,x4],
   ##                            [y1,y2,y3,y4] ]
 ##  ##
 my %plot_defaults =   
   ###################################################################
   ##                                                               ##
   ##        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 = 
     (      (
      height       => {default => 200,       test => $int_test  },       lines          => 2,     # Maybe this will be used in the future
      width        => {default => 200,       test => $int_test  },       linespoints    => 2,     # to check on whether or not they have 
      bgcolor      => {default => 'xffffff', test => $color_test},       dots    => 2,     # supplied enough <data></data> fields
      fgcolor      => {default => 'x000000', test => $color_test},       points         => 2,     # to use the given line style.  But for
      transparent  => {default => 'off',     test => $onoff_test},       steps    => 2,     # now there are more important things 
      grid         => {default => 'off',     test => $onoff_test},       fsteps    => 2,     # for me to deal with.
      border       => {default => 'on',      test => $onoff_test},       histeps        => 2,
      font         => {default => 'medium',  test => $sml_test  }       errorbars    => 3,
        xerrorbars    => [3,4],
        yerrorbars    => [3,4],
        xyerrorbars    => [4,6],
        boxes          => 3,
   #     boxerrorbars   => [3,4,5],
   #     boxxyerrorbars => [4,6,7],
   #     financebars    => 5,
   #     candlesticks   => 5,
        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 $color_test     = sub {$_[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 $linestyle_test = sub {exists($linestyles{$_[0]})};
   my $words_test     = sub {$_[0]=~s/\s+/ /g;$_[0]=~/^([\w\(\)]+ ?)+$/};
   
   ###################################################################
   ##                                                               ##
   ##                      Attribute metadata                       ##
   ##                                                               ##
   ###################################################################
   my @gnuplot_edit_order = 
       qw/bgcolor fgcolor height width font transparent grid border align/;
   
   my $gnuplot_help_text = <<"ENDPLOTHELP";
   <p>
   The <b>gnuplot</b> tag allows an author to design a plot which can
   be created on the fly.  This is intended for use in homework problems
   where each student needs to see a distinct plot.  It can be used in
   conjunction with a <b>script</b> tag to generate random plots.
   </p><p>
   A <b>gnuplot</b> tag can contain the following sub-tags:
   </p>
   <dl>
   <dt> Plot Label
       <dd> Allows you to place text at a given (x,y) coordinate on the plot.
   <dt> Plot Title
       <dd> The title of the plot
   <dt> Plot Xlabel
       <dd> The label on the horizontal axis of the plot
   <dt> Plot Ylabel
       <dd> The label on the vertical axis of the plot
   <dt> Plot Axes
       <dd> allows specification of the x and y ranges displayed in the plot
   <dt> Plot Key
       <dd> Lists the functions displayed in the plot.
   <dt> Plot Curve
       <dd> Sets the data used in the plot.
   <dt> Plot Tics
       <dd> Allows specification of the x and y coordinate 'tics' on the axes.
   This is mostly used to adjust the grid lines when a grid is displayed.
   </dl>
   ENDPLOTHELP
   
   my %gnuplot_defaults = 
       (
        height       => {
    default     => 200,
    test        => $int_test,
    description => 'height of image (pixels)',
         edit_type   => 'entry',
    size        => '10'
    },
        width        => {
    default     => 200,
    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     => 'off',
    test        => $onoff_test, 
    description => 'Display grid',
    edit_type   => 'onoff'
    },
        border       => {
    default     => 'on',
    test        => $onoff_test, 
    description => 'Draw border around plot',
    edit_type   => 'onoff'
    },
        font         => {
    default     => 'medium',
    test        => $sml_test,
    description => 'Size of font to use',
    edit_type   => 'choice',
    choices     => ['small','medium','large']
    },
        align        => {
    default     => 'left',
    test        => sub {$_[0]=~/^(left|right|center)$/},
    description => 'alignment for image in html',
    edit_type   => 'choice',
    choices     => ['left','right','center']
    } 
      );       );
   
 my %key_defaults =   my %key_defaults = 
     (      (
      title => { default => '',          test => $words_test  },       title => { 
      box   => { default => 'off',       test => $onoff_test  },   default => '',
      pos   => { default => 'top right', test => $key_pos_test}   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 =   my %label_defaults = 
     (      (
      xpos    => {default => 0,         test => $real_test                   },       xpos    => {
      ypos    => {default => 0,         test => $real_test                   },   default => 0,
      justify => {default => 'left',       test => $real_test,
                  test => sub {$_[0]=~/^(left|right|center)$/}}   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');
   my %tic_defaults =
       (
        location => {
    default => 'border', 
    test => sub {$_[0]=~/^(border|axis)$/},
    description => 'Location of tick marks',
    edit_type   => 'choice',
    choices     => ['border','axis']
    },
        mirror => {
    default => 'on', 
    test => $onoff_test,
    description => 'mirror ticks on opposite axis?',
    edit_type   => 'onoff'
    },
        start => {
    default => '-10.0',
    test => $real_test,
    description => 'Start ticks at',
    edit_type   => 'entry',
    size        => '10'
    },
        increment => {
    default => '1.0',
    test => $real_test,
    description => 'Place a tick every',
    edit_type   => 'entry',
    size        => '10'
    },
        end => {
    default => ' 10.0',
    test => $real_test,
    description => 'Stop ticks at ',
    edit_type   => 'entry',
    size        => '10'
    },
      );       );
   
 my %axis_defaults =   my %axis_defaults = 
     (      (
      color     => {default => 'x000000', test => $color_test},       color   => {
 #     thickness => {default => 1,         test => $int_test  },   default => 'x000000', 
      xmin      => {default => -10.0,     test => $real_test },   test => $color_test,
      xmax      => {default =>  10.0,     test => $real_test },   description => 'color of axes (x000000)',
      ymin      => {default => -10.0,     test => $real_test },   edit_type   => 'entry',
      ymax      => {default =>  10.0,     test => $real_test }   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_help_text = <<"ENDCURVEHELP";
   The <b>curve</b> tag is where you set the data to be plotted by gnuplot.
   There are two ways of entering the information:
   <dl>
       <dt> Curve Data
       <dd> Using a <b>data</b> tag you can specify the numbers used to produce 
   the plot.  
   <p>
   By default, two <b>data</b> tags will be available in a plot.  The
   first will specify X coordinates of the data and the second will
   give the Y coordinates of the data.  When working with a linestyle that 
   requires more than two data sets, inserting another <b>data</b> tag is
   required.  Unfortunately, you must make sure the <b>data</b> tags appear
   in the order gnuplot expects the data.
   </p><p>
   Specifying the data should usually be done with a perl variable or array, 
   such as \@Xdata and \@Ydata.  You may also specify numerical data seperated 
   by commas.  Again, the order of the <b>data</b> tags is important.  The
   first tag will be the X data and the second will be the Y data.
   </p>
       <dt> Curve Function
       <dd> The <b>function</b> tag allows you to specify the curve to be 
   plotted as a formula that gnuplot can understand.  Be careful using this
   tag - it is surprisingly easy to give gnuplot a function it cannot deal
   with properly.  Be explicit: 2*sin(2*3.141592*x/4) will work but
   2sin(2*3.141592x/4) will not.  If you do not receive any errors in the
   gnuplot data but still do not have an image produced, it is likely there
   is an error in your <b>function</b> tag.
   </dl>
   ENDCURVEHELP
   
 my %curve_defaults =   my %curve_defaults = 
     (      (
      color     => {default => 'x000000', test => $color_test      },       color     => {
      name      => {default => 'x000000', test => sub {$_[0]=~/^[\w ]*$/} },   default => 'x000000',
      linestyle => {default => 'lines',   test => $linestyle_test  }   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)]
    }
      );       );
   
 ##  ###################################################################
 ## End of defaults  ##                                                               ##
 ##  ##                    parsing and edit rendering                 ##
 my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves);  ##                                                               ##
   ###################################################################
 sub start_plot {  my (%plot,%key,%axis,$title,$xlabel,$ylabel,@labels,@curves,%xtics,%ytics);
     %plot = '';   %key='';    %axis='';   
     $title='';    $xlabel=''; $ylabel='';  sub start_gnuplot {
     @labels = ''; @curves='';      %plot    = ();      %key     = ();      %axis   = (); 
       $title   = undef;   $xlabel  = undef;   $ylabel = undef;
       $#labels = -1;      $#curves = -1;
       %xtics    = ();      %ytics    = ();
     #      #
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     &Apache::lonxml::register('Apache::plot',      &Apache::lonxml::register('Apache::lonplot',
      ('title','xlabel','ylabel','key','axis','label','curve'));       ('title','xlabel','ylabel','key','axis','label','curve',
     push (@Apache::lonxml::namespace,'plot');        'xtics','ytics'));
     ## Always evaluate the insides of the <plot></plot> tags      push (@Apache::lonxml::namespace,'lonplot');
     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,$safeeval,'plot');  
     if ($target eq 'web') {      if ($target eq 'web') {
    my $inside = &Apache::lonxml::get_all_text("/gnuplot",$$parser[-1]);
    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
    &Apache::lonxml::newparser($parser,\$inside);
    &get_attributes(\%plot,\%gnuplot_defaults,$parstack,$safeeval,
    $tagstack->[-1]);
       } elsif ($target eq 'edit') {
    $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
    $result .= &make_javascript();
    $result .= &help_win($gnuplot_help_text);
    $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
       \@gnuplot_edit_order);
       } elsif ($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 '';      return $result;
 }  }
   
 sub end_plot {  sub end_gnuplot {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
     &Apache::lonxml::deregister('Apache::lonplot',      &Apache::lonxml::deregister('Apache::lonplot',
  ('title','xlabel','ylabel','key','axis','label','curve'));   ('title','xlabel','ylabel','key','axis','label','curve'));
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  ## Determine filename -- Need to use the 'id' thingy that Gerd    &check_inputs(); # Make sure we have all the data we need
  ## mentioned.   ##
    ## Determine filename
  my $tmpdir = '/home/httpd/perl/tmp/';   my $tmpdir = '/home/httpd/perl/tmp/';
  my $filename = $tmpdir.$ENV{'user.name'}.'_'.$ENV{'user.domain'}.   my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}.
     '_plot.data';      '_'.time.'_'.$$.int(rand(1000)).'_plot.data';
  my $usersees=md5_base64($filename.'_'.$ENV{'REMOTE_ADDR'});  
   
  ## Write the plot description to the file   ## Write the plot description to the file
  my $fh=&Apache::File->new('/home/httpd/perl/tmp/'.$realname);   &write_gnuplot_file($tmpdir,$filename);
  &write_gnuplot_file($fh);  
  ## return image tag for the plot   ## return image tag for the plot
  $result = '<img src=\"/cgi-bin/plot.cgi?'.$usersees.'"';   $result .= <<"ENDIMAGE";
   <img src    = "/cgi-bin/plot.gif?$filename" 
        width  = "$plot{'width'}" 
        height = "$plot{'height'}"
        align  = "$plot{'align'}"
        alt    = "image should be /cgi-bin/plot.gif?$filename" />
   ENDIMAGE
       } 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 $result='';
       if ($target eq 'web') {
    &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 end_xtics {
       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;
   }
   
   ##--------------------------------------------------------------- ytics
   sub start_ytics {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result='';
       if ($target eq 'web') {
    &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;      return $result;
 }  }
   
   sub end_ytics {
       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;
   }
   
   
 ##----------------------------------------------------------------- key  ##----------------------------------------------------------------- key
 sub start_key {  sub start_key {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     &get_attributes(\%key,\%key_defaults,$parstack,$safeeval,$tagstack);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   &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;      return $result;
 }  }
Line 159  sub end_key { Line 552  sub end_key {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
   
 ##------------------------------------------------------------------- title  ##------------------------------------------------------------------- title
 sub start_title {  sub start_title {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $title = &Apache::lonxml::get_all_text("/title",$$parser[-1]);  
     my $result='';      my $result='';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   $title = &Apache::lonxml::get_all_text("/title",$$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",$$parser[-1]);
    $result.=&Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    my $text=$$parser[-1]->get_text("/title");
    $result.=&Apache::edit::rebuild_tag($token);
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 178  sub end_title { Line 585  sub end_title {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
Line 186  sub end_title { Line 594  sub end_title {
 sub start_xlabel {  sub start_xlabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$parser[-1]);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   $xlabel = &Apache::lonxml::get_all_text("/xlabel",$$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",$$parser[-1]);
    $result.=&Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    my $text=$$parser[-1]->get_text("/xlabel");
    $result.=&Apache::edit::rebuild_tag($token);
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 197  sub end_xlabel { Line 617  sub end_xlabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
   
 ##------------------------------------------------------------------- ylabel  ##------------------------------------------------------------------- ylabel
 sub start_ylabel {  sub start_ylabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$parser[-1]);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   $ylabel = &Apache::lonxml::get_all_text("/ylabel",$$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",$$parser[-1]);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    my $text=$$parser[-1]->get_text("/ylabel");
    $result.=&Apache::edit::rebuild_tag($token);
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 216  sub end_ylabel { Line 650  sub end_ylabel {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
   
 ##------------------------------------------------------------------- label  ##------------------------------------------------------------------- label
 sub start_label {  sub start_label {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     my %label;  
     &get_attributes($label,\%label_defaults,$parstack,$safeeval,$tagstack);  
     $label->{'text'} = &Apache::lonxml::get_all_text("/label",$$parser[-1]);  
     push(@labels,\%label);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   my %label;
    &get_attributes(\%label,\%label_defaults,$parstack,$safeeval,
       $tagstack->[-1]);
    my $text = &Apache::lonxml::get_all_text("/label",$$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",$$parser[-1]);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    &Apache::edit::get_new_args
       ($token,$parstack,$safeeval,keys(%label_defaults));
    $result.=&Apache::edit::rebuild_tag($token);
    my $text=$$parser[-1]->get_text("/label");
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 238  sub end_label { Line 689  sub end_label {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
Line 247  sub end_label { Line 699  sub end_label {
 sub start_curve {  sub start_curve {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     my %curve;  
     &get_attributes($curve,\%curve_defaults,$parstack,$safeeval,$tagstack);  
     push (@curves,$curve);  
     &Apache::lonxml::register('Apache::lonplot',('function','data'));      &Apache::lonxml::register('Apache::lonplot',('function','data'));
     push (@Apache::lonxml::namespace,'curve');      push (@Apache::lonxml::namespace,'curve');
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   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');
    $result .= &help_win($curve_help_text);
    $result .= &edit_attributes($target,$token,\%curve_defaults);
       } elsif ($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;      return $result;
 }  }
Line 264  sub end_curve { Line 727  sub end_curve {
     pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
     &Apache::lonxml::deregister('Apache::lonplot',('function','data'));      &Apache::lonxml::deregister('Apache::lonplot',('function','data'));
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
     }      }
     return $result;      return $result;
 }  }
   
 ##------------------------------------------------------------ curve function  ##------------------------------------------------------------ curve function
 sub start_function {  sub start_function {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     if (exists($curves[-1]->{'data'}) {  
  &Apache::lonxml::warning('Use of <function> precludes use of <data>.  The <data> will be omitted in favor of the <function> declaration.');  
  delete($curves[-1]->{'data'});  
     }  
     $curves[-1]->{'function'} =   
  &Apache::lonxml::get_all_text("/function",$$parser[-1]);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   if (exists($curves[-1]->{'data'})) {
       &Apache::lonxml::warning('Use of <function> precludes use of <data>.  The <data> will be omitted in favor of the <function> declaration.');
       delete $curves[-1]->{'data'} ;
    }
    $curves[-1]->{'function'} = 
       &Apache::lonxml::get_all_text("/function",$$parser[-1]);
       } elsif ($target eq 'edit') {
    $result .= &Apache::edit::tag_start($target,$token,'Gnuplot compatible curve function');
    my $text = &Apache::lonxml::get_all_text("/function",$$parser[-1]);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    $result.=&Apache::edit::rebuild_tag($token);
    my $text=$$parser[-1]->get_text("/function");
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 288  sub end_function { Line 762  sub end_function {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result .= &Apache::edit::end_table();
     }      }
     return $result;      return $result;
 }  }
   
 ##------------------------------------------------------------ curve  data  ##------------------------------------------------------------ curve  data
 sub start_data {  sub start_data {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     if (exists($curves[-1]->{'function'})) {  
  &Apache::lonxml::warning('Use of <data> precludes use of <function>.  The <function> will be omitted in favor of the <data> declaration.');  
  delete($curves[-1]->{'function'});  
     }  
     my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-1]);  
     $datatext =~ s/(\s+$|^\s+)//g;  
     $datatext =~ s/\s+/ /g;  
     if ($datatext !~ /^(([+-]?\d*\.?\d*)[, ]?)+$/) {  
  &Apache::lonxml::warning('Malformed data: '.$datatext);  
  $datatext = '';  
     }  
     # Need to do some error checking on the @data array -   
     # make sure it's all numbers and make sure each array   
     # is of the same length.  
     my @data = split /[, ]/,$datatext;  
     push( @{$curves[-1]->{'data'}},\@data;  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   if (exists($curves[-1]->{'function'})) {
       &Apache::lonxml::warning('Use of <data> precludes use of .'.
       '<function>.  The <function> will be omitted in favor of '.
               'the <data> declaration.');
       delete($curves[-1]->{'function'});
    }
    my $datatext = &Apache::lonxml::get_all_text("/data",$$parser[-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 /,/,$datatext;
    } else { # Assume it's space seperated.
       @data = split / /,$datatext;
    }
    for (my $i=0;$i<=$#data;$i++) {
       # Check that it's non-empty
       if (! defined($data[$i])) {
    &Apache::lonxml::warning(
       'undefined <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 <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",$$parser[-1]);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row().
       &Apache::edit::editfield('',$text,'',60,1);
       } elsif ($target eq 'modified') {
    $result.=&Apache::edit::rebuild_tag($token);
    my $text=$$parser[-1]->get_text("/data");
    $result.=&Apache::edit::modifiedfield($token);
     }      }
     return $result;      return $result;
 }  }
Line 322  sub end_data { Line 837  sub end_data {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result .= &Apache::edit::end_table();
     }      }
     return $result;      return $result;
 }  }
Line 331  sub end_data { Line 847  sub end_data {
 sub start_axis {  sub start_axis {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     &get_attributes(\%axis,\%label_defaults,$parstack,$safeeval,$tagstack);  
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.   &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);
    }
     }      }
     return $result;      return $result;
 }  }
Line 342  sub end_axis { Line 867  sub end_axis {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result = '';      my $result = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  # This routine should never return anything.      } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_end($target,$token);
       } elsif ($target eq 'modified') {
     }      }
     return $result;      return $result;
 }  }
   
   ###################################################################
   ##                                                               ##
   ##        Utility Functions                                      ##
   ##                                                               ##
   ###################################################################
   
   ##----------------------------------------------------------- set_defaults
   sub set_defaults {
       my ($var,$defaults) = @_;
       my $key;
       foreach $key (keys(%$defaults)) {
    $var->{$key} = $defaults->{$key}->{'default'};
       }
   }
   
 ##------------------------------------------------------------------- misc  ##------------------------------------------------------------------- misc
 sub get_attributes{  sub get_attributes{
     %values   = %{shift};      my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
     %defaults = %{shift};      foreach my $attr (keys(%{$defaults})) {
     $parstack = shift;   $values->{$attr} = 
     $safeeval = shift;      &Apache::lonxml::get_param($attr,$parstack,$safeeval);
     $tag      = shift;   if ($values->{$attr} eq '' | !defined($values->{$attr})) {
     my $attr;      $values->{$attr} = $defaults->{$attr}->{'default'};
     foreach $attr (keys %defaults) {  
  $values{$attr} = &Apache::lonxml::get_param($attr,$parstack,$safeeval);  
  if ($values{$attr} eq '' | !defined($values{$attr})) {  
     $values{$attr} = $defaults{$attr};  
     next;      next;
  }   }
  my $test = $defaults{$attr}->{'test'};   my $test = $defaults->{$attr}->{'test'};
  if (! &$test($values{$attr})) {   if (! &$test($values->{$attr})) {
     &Apache::lonxml::warning      &Apache::lonxml::warning
  ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '   ($tag.':'.$attr.': Bad value.'.'Replacing your value with : '
  .$defaults{$attr} );   .$defaults->{$attr}->{'default'} );
     $values{$attr} = $defaults{$attr};      $values->{$attr} = $defaults->{$attr}->{'default'};
    }
     }      }
     return ;      return ;
 }  }
   
   ##------------------------------------------------------- write_gnuplot_file
 sub write_gnuplot_file {  sub write_gnuplot_file {
     my $fh = shift;      my ($tmpdir,$filename)= @_;
     my $gnuplot_input = '';      my $gnuplot_input = '';
       my $curve;
     # Collect all the colors      # Collect all the colors
     my @Colors;      my @Colors;
     push @Colors, $plot{'bgcolor'};      push @Colors, $plot{'bgcolor'};
     push @Colors, $plot{'fgcolor'};       push @Colors, $plot{'fgcolor'}; 
     push @Colors, $axis{'color'};      push @Colors, (defined($axis{'color'})?$axis{'color'}:$plot{'fgcolor'});
     push @Colors, $axis{'color'};       foreach $curve (@curves) {
     foreach $curve (@Curves) {   push @Colors, ($curve->{'color'} ne '' ? 
  push @Colors, ($curve{'color'} ne '' ?          $curve->{'color'}       : 
        $curve{'color'}       :          $plot{'fgcolor'}        );
        $plot{'fgcolor'}      );  
     }      }
     # set term      # set term
     $gnuplot_input .= 'set term gif ';      $gnuplot_input .= 'set term gif ';
     $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');      $gnuplot_input .= 'transparent ' if ($plot{'transparent'} eq 'on');
     $gnuplot_input .= $plot{'font'} . ' ';      $gnuplot_input .= $plot{'font'} . ' ';
     $gnuplot_input .= 'size ' . $plot{'width'} . ' ';      $gnuplot_input .= 'size '.$plot{'width'}.','.$plot{'height'}.' ';
     $gnuplot_input .= $plot{'height'} . ' ';  
     $gnuplot_input .= "@Colors\n";      $gnuplot_input .= "@Colors\n";
       # set output
       $gnuplot_input .= "set output\n";
     # grid      # grid
     $gnuplot_input .= ($plot->{'grid'} eq 'on' ?      $gnuplot_input .= 'set grid'.$/ if ($plot{'grid'} eq 'on');
        'set grid\n'            :  
        ''                      );  
     # border      # border
     $gnuplot_input .= ($plot->{'border'} eq 'on'?      $gnuplot_input .= ($plot{'border'} eq 'on'?
        'set border\n'           :         'set border'.$/           :
        'set noborder\n'         );    # title, xlabel, ylabel         'set noborder'.$/         );    # title, xlabel, ylabel
     {      # titles
     $gnuplot_input .<<"ENDLABELS";      $gnuplot_input .= "set title  \"$title\"\n"  if (defined($title)) ;
 set title  $title->{'text'}      $gnuplot_input .= "set xlabel \"$xlabel\"\n" if (defined($xlabel));
 set xlabel $xlabel->{'text'}      $gnuplot_input .= "set ylabel \"$ylabel\"\n" if (defined($ylabel));
 set ylabel $ylabel->{'text'}      # tics
 set xrange $axis->{'xmin'}:$axis->{'xmax'}      if (%xtics) {    
 set yrange $axis->{'ymin'}:$axis->{'ymax'}   $gnuplot_input .= "set xtics $xtics{'location'} ";
 ENDLABELS   $gnuplot_input .= ( $xtics{'mirror'} eq 'on'?"mirror ":"nomirror ");
    $gnuplot_input .= "$xtics{'start'}, ";
    $gnuplot_input .= "$xtics{'increment'}, ";
    $gnuplot_input .= "$xtics{'end'}\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";
       }
       # axis
       if (%axis) {
    $gnuplot_input .= "set xrange \[$axis{'xmin'}:$axis{'xmax'}\]\n";
    $gnuplot_input .= "set yrange \[$axis{'ymin'}:$axis{'ymax'}\]\n";
     }      }
     # Key      # Key
     if (defined($key{'pos'})) {      if (%key) {
  $gnuplot_input .= 'set key '.$key->{'pos'}.' ';   $gnuplot_input .= 'set key '.$key{'pos'}.' ';
  $gnuplot_input .= ($key->{'box'} eq 'on' ? 'box ' : 'nobox ');   if ($key{'title'} ne '') {
  if ($key->{'title'} ne '') {      $gnuplot_input .= 'title " '.$key{'title'}.'" ';
     $gnuplot_input .= 'title "'$key->{'title'}.'"\n';   } 
  } else {   $gnuplot_input .= ($key{'box'} eq 'on' ? 'box ' : 'nobox ').$/;
     $gnuplot_input .= '\n';  
  }  
     } else {      } else {
  $gnuplot_input .= 'set nokey\n';   $gnuplot_input .= 'set nokey'.$/;
     }          }
     # axis  
     $gnuplot_input .= 'set xrange ['.$axis{'xmin'}.':'.$axis{'xmin'}.']\n';  
     $gnuplot_input .= 'set yrange ['.$axis{'ymin'}.':'.$axis{'ymin'}.']\n';  
     # labels      # labels
       my $label;
     foreach $label (@labels) {      foreach $label (@labels) {
  $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.   $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
     $label->{'x'}.','.$label->{'y'}.'\n';      $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.$/ ;
     }      }
     # curves      # curves
     $gnuplot_input .= 'plot ';      $gnuplot_input .= 'plot ';
     my $datatext = '';      for (my $i = 0;$i<=$#curves;$i++) {
     foreach $curve (@curves) {   $curve = $curves[$i];
    $gnuplot_input.= ', ' if ($i > 0);
  if (exists($curve->{'function'})) {   if (exists($curve->{'function'})) {
     $gnuplot_input.= $curve->{'function'}.' with '.$curve->{'linestyle'};      $gnuplot_input.= 
    $curve->{'function'}.' title "'.
    $curve->{'name'}.'" with '.
    $curve->{'linestyle'};
  } elsif (exists($curve->{'data'})) {   } elsif (exists($curve->{'data'})) {
     $gnuplot_input.= '\'-\' with '.$curve->{'linestyle'};      # Store data values in $datatext
       my $datatext = '';
       #   get new filename
       my $datafilename = "$tmpdir/$filename.$i";
       my $fh=Apache::File->new(">$datafilename");
       # Compile data
     my @Data = @{$curve->{'data'}};      my @Data = @{$curve->{'data'}};
     for ($i =0; $i<=$#Data; $i++) {      my @Data0 = @{$Data[0]};
       for (my $i =0; $i<=$#Data0; $i++) {
    my $dataset;
  foreach $dataset (@Data) {   foreach $dataset (@Data) {
     $datatext .= $dataset[$i] . ' ';      $datatext .= $dataset->[$i] . ' ';
  }   }
  $datatext .='\n';   $datatext .= $/;
     }      }
     $datatext .='\n';      #   write file
       print $fh $datatext;
       close ($fh);
       #   generate gnuplot text
       $gnuplot_input.= '"'.$datafilename.'" title "'.
    $curve->{'name'}.'" with '.
    $curve->{'linestyle'};
  }   }
     }      }
     $gnuplot_input .= $datatext;      # Write the output to a file.
       my $fh=Apache::File->new(">$tmpdir$filename");
     print $fh $gnuplot_input;      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 (! %plot) { &set_defaults(\%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 <data> or <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') {
       $result .= &Apache::edit::select_arg
    ($description,$attr,$defaults->{$attr}->{'choices'},$token);
    } elsif ($defaults->{$attr}->{'edit_type'} eq 'onoff') {
       $result .= &Apache::edit::select_arg
    ($description,$attr,['on','off'],$token);
    }
    $result .= '<br />';
       }
       return $result;
 }  }
   
 1;  
 __END__  
   
   ###################################################################
   ##                                                               ##
   ##           Insertion functions for editing plots               ##
   ##                                                               ##
   ###################################################################
   
   sub insert_gnuplot {
       my $result = '';
       #  plot attributes
       $result .= "<plot \n";
       foreach my $attr (keys(%gnuplot_defaults)) {
    $result .= "     $attr=\"$gnuplot_defaults{$attr}->{'default'}\"\n";
       }
       $result .= ">\n";
       # 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 <plot>
       $result .= "</plot>\n";
       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)) {
    $result .= "$attr=\"$tic_defaults{$attr}->{'default'}\" ";
       }
       $result .= "/>\n";
       return $result;
   }
   
   sub insert_ytics {
       my $result;
       $result .= "\n    <ytics ";
       foreach my $attr (keys(%tic_defaults)) {
    $result .= "$attr=\"$tic_defaults{$attr}->{'default'}\" ";
       }
       $result .= "/>\n";
       return $result;
   }
   
   sub insert_key {
       my $result;
       $result .= "\n    <key \n";
       foreach my $attr (keys(%key_defaults)) {
    $result .= "         $attr=\"$key_defaults{$attr}->{'default'}\"\n";
       }
       $result .= "   />\n";
       return $result;
   }
   
   sub insert_axis{
       my $result;
       $result .= "\n    <axis ";
      foreach my $attr (keys(%axis_defaults)) {
    $result .= "         $attr=\"$axis_defaults{$attr}->{'default'}\"\n";
       }
       $result .= "   />\n";
       return $result;
   }
   
   sub insert_title { return "\n    <title></title>\n"; }
   sub insert_xlabel { return "\n    <xlabel></xlabel>\n"; }
   sub insert_ylabel { return "\n    <ylabel></ylabel>\n"; }
   
   sub insert_label {
       my $result;
       $result .= "\n    <label ";
       foreach my $attr (keys(%label_defaults)) {
    $result .= '         '.$attr.'="'.
       $label_defaults{$attr}->{'default'}."\"\n";
       }
       $result .= "   ></label>\n";
       return $result;
   }
   
   sub insert_curve {
       my $result;
       $result .= "\n    <curve ";
       foreach my $attr (keys(%curve_defaults)) {
    $result .= '         '.$attr.'="'.
       $curve_defaults{$attr}->{'default'}."\"\n";
       }
       $result .= "    >\n";
       $result .= &insert_data().&insert_data()."</curve>\n";
   }
   
   sub insert_function {
       my $result;
       $result .= "<function></function>\n";
       return $result;
   }
   
   sub insert_data {
       my $result;
       $result .= "     <data></data>\n";
       return $result;
   }
   
   ##----------------------------------------------------------------------
   # Javascript functions to display help for tags
   
   sub make_javascript {
       my $helpwindowwidth  = 400;
       my $helpwindowheight = 400;
       my $result = '';
       $result.=<<"ENDFUNCTION";
   <script language="JavaScript">
   function openWin(text)
   {
     newWin = open("", "new_W", "width=$helpwindowwidth,height=$helpwindowheight,resizable=1,scrollbars=1");
     newWin.document.open("text/html", "replace");
     newWin.document.writeln(text);
     newWin.document.writeln('<center><a href=\"javascript:window.close()\">close this window</a></center>');
     newWin.document.close();
   }
   </script>
   ENDFUNCTION
       return $result;
   }
   
   sub help_win {
       my ($helptext)=@_;
       $helptext =~ s/\n/ /g;
       $helptext =~ s/\'/\\\'/g;
       my $result = '';
       $result.=<<"ENDWIN";
   <table width="100%"><tr><td align="right">
   <a href="javascript:openWin('$helptext')">help</a>
   </td></tr></table><hr />
   ENDWIN
       return $result;
   }
   ##----------------------------------------------------------------------
   1;
   __END__
   
   
Removed from v.1.8  
changed lines
  Added in v.1.48

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>