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Diff for /loncom/xml/lonplot.pm between versions 1.91 and 1.96

version 1.91, 2003/09/27 04:08:56 version 1.96, 2004/05/26 19:44:20
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 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 01/07 01/08 01/09 Matthew  
 # 01/21 02/05 02/06 2/28Matthew  
   
 package Apache::lonplot;  package Apache::lonplot;
   
Line 115  my $words_test     = sub {$_[0]=~s/\s+/ Line 110  my $words_test     = sub {$_[0]=~s/\s+/
 ###################################################################  ###################################################################
 my @gnuplot_edit_order =   my @gnuplot_edit_order = 
     qw/alttag bgcolor fgcolor height width font transparent grid samples       qw/alttag bgcolor fgcolor height width font transparent grid samples 
     border align texwidth plottype/;      border align texwidth texfont plottype/;
   
 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>  
 If you are having trouble with your plot, please read the help  
 available on Plot Curve.  
 ENDPLOTHELP  
   
 my %gnuplot_defaults =   my %gnuplot_defaults = 
     (      (
Line 232  my %gnuplot_defaults = Line 195  my %gnuplot_defaults =
          edit_type   => 'entry',           edit_type   => 'entry',
          size        => '5'           size        => '5'
          },           },
        texfont     => {
            default     => '22',
            test        => $int_test,
            description => 'Font size to use in TeX output (pts):',
            edit_type   => 'choice',
            choices     => [qw/8 10 12 14 16 18 20 22 24 26 28 30 32 34 36/],
            },
      plottype  => {       plottype  => {
  default     => 'Cartesian',   default     => 'Cartesian',
  test        => sub {$_[0]=~/^(Polar|Cartesian)$/},   test        => sub {$_[0]=~/^(Polar|Cartesian)$/},
  description => 'Plot type:',   description => 'Plot type:',
  edit_type   => 'choice',   edit_type   => 'choice',
          choices     => ['Polar','Cartesian']           choices     => ['Cartesian','Polar']
          },           },
      );       );
   
Line 378  my %axis_defaults = Line 348  my %axis_defaults =
  }   }
      );       );
   
 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.  <b>Be careful using this  
 tag.</b>  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_edit_order = ('color','name','linestyle','pointtype','pointsize');  my @curve_edit_order = ('color','name','linestyle','pointtype','pointsize');
   
 my %curve_defaults =   my %curve_defaults = 
Line 482  sub start_gnuplot { Line 421  sub start_gnuplot {
  $tagstack->[-1]);   $tagstack->[-1]);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');   $result .= &Apache::edit::tag_start($target,$token,'GnuPlot');
  $result .= &make_javascript();  
  $result .= &help_win($gnuplot_help_text);  
  $result .= &edit_attributes($target,$token,\%gnuplot_defaults,   $result .= &edit_attributes($target,$token,\%gnuplot_defaults,
     \@gnuplot_edit_order);      \@gnuplot_edit_order);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
Line 505  sub end_gnuplot { Line 442  sub end_gnuplot {
     my $randnumber;      my $randnumber;
     # need to call rand everytime start_script would evaluate, as the      # need to call rand everytime start_script would evaluate, as the
     # safe space rand number generator and the global rand generator       # safe space rand number generator and the global rand generator 
     # are not seperate      # are not separate
     if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||      if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
  $target eq 'answer') {   $target eq 'answer') {
       $randnumber=int(rand(1000));        $randnumber=int(rand(1000));
Line 652  sub start_title { Line 589  sub start_title {
     &Apache::edit::start_spanning_row().      &Apache::edit::start_spanning_row().
     &Apache::edit::editline('',$text,'',60);      &Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  my $text=$$parser[-1]->get_text("/title");  
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  $result.=&Apache::edit::modifiedfield($token);   $result.=&Apache::edit::modifiedfield("/title",$parser);
     }      }
     return $result;      return $result;
 }  }
Line 686  sub start_xlabel { Line 622  sub start_xlabel {
     &Apache::edit::start_spanning_row().      &Apache::edit::start_spanning_row().
     &Apache::edit::editline('',$text,'',60);      &Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  my $text=$$parser[-1]->get_text("/xlabel");  
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  $result.=&Apache::edit::modifiedfield($token);   $result.=&Apache::edit::modifiedfield("/xlabel",$parser);
     }      }
     return $result;      return $result;
 }  }
Line 721  sub start_ylabel { Line 656  sub start_ylabel {
     &Apache::edit::start_spanning_row().      &Apache::edit::start_spanning_row().
     &Apache::edit::editline('',$text,'',60);      &Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  my $text=$$parser[-1]->get_text("/ylabel");  
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  $result.=&Apache::edit::modifiedfield($token);   $result.=&Apache::edit::modifiedfield("/ylabel",$parser);
     }      }
     return $result;      return $result;
 }  }
Line 763  sub start_label { Line 697  sub start_label {
  &Apache::edit::get_new_args   &Apache::edit::get_new_args
     ($token,$parstack,$safeeval,keys(%label_defaults));      ($token,$parstack,$safeeval,keys(%label_defaults));
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  my $text=$$parser[-1]->get_text("/label");   $result.=&Apache::edit::modifiedfield("/label",$parser);
  $result.=&Apache::edit::modifiedfield($token);  
     }      }
     return $result;      return $result;
 }  }
Line 792  sub start_curve { Line 725  sub start_curve {
  push (@curves,\%curve);   push (@curves,\%curve);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result .= &Apache::edit::tag_start($target,$token,'Curve');   $result .= &Apache::edit::tag_start($target,$token,'Curve');
  $result .= &help_win($curve_help_text);  
  $result .= &edit_attributes($target,$token,\%curve_defaults,   $result .= &edit_attributes($target,$token,\%curve_defaults,
                                     \@curve_edit_order);                                      \@curve_edit_order);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
Line 842  sub start_function { Line 774  sub start_function {
     &Apache::edit::editline('',$text,'',60);      &Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  my $text=$$parser[-1]->get_text("/function");   $result.=&Apache::edit::modifiedfield("/function",$parser);
  $result.=&Apache::edit::modifiedfield($token);  
     }      }
     return $result;      return $result;
 }  }
Line 885  sub start_data { Line 816  sub start_data {
  my @data;   my @data;
  if ($datatext =~ /,/) { # comma deliminated   if ($datatext =~ /,/) { # comma deliminated
     @data = split /,/,$datatext;      @data = split /,/,$datatext;
  } else { # Assume it's space seperated.   } else { # Assume it's space separated.
     @data = split / /,$datatext;      @data = split / /,$datatext;
  }   }
  for (my $i=0;$i<=$#data;$i++) {   for (my $i=0;$i<=$#data;$i++) {
Line 920  sub start_data { Line 851  sub start_data {
     &Apache::edit::editline('',$text,'',60);      &Apache::edit::editline('',$text,'',60);
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  $result.=&Apache::edit::rebuild_tag($token);   $result.=&Apache::edit::rebuild_tag($token);
  my $text=$$parser[-1]->get_text("/data");   $result.=&Apache::edit::modifiedfield("/data",$parser);
  $result.=&Apache::edit::modifiedfield($token);  
     }      }
     return $result;      return $result;
 }  }
Line 987  sub set_defaults { Line 917  sub set_defaults {
 sub get_attributes{  sub get_attributes{
     my ($values,$defaults,$parstack,$safeeval,$tag) = @_;      my ($values,$defaults,$parstack,$safeeval,$tag) = @_;
     foreach my $attr (keys(%{$defaults})) {      foreach my $attr (keys(%{$defaults})) {
  if ($attr eq 'texwidth') {   if ($attr eq 'texwidth' || $attr eq 'texfont') {
     $values->{$attr} =       $values->{$attr} = 
  &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);   &Apache::lonxml::get_param($attr,$parstack,$safeeval,undef,1);
  } else {   } else {
Line 1014  sub write_gnuplot_file { Line 944  sub write_gnuplot_file {
     my ($tmpdir,$filename,$target)= @_;      my ($tmpdir,$filename,$target)= @_;
     my $gnuplot_input = '';      my $gnuplot_input = '';
     my $curve;      my $curve;
       my $pt = $plot{'texfont'};
     # Collect all the colors      # Collect all the colors
     my @Colors;      my @Colors;
     push @Colors, $plot{'bgcolor'};      push @Colors, $plot{'bgcolor'};
Line 1034  sub write_gnuplot_file { Line 965  sub write_gnuplot_file {
  # set output   # set output
  $gnuplot_input .= "set output\n";   $gnuplot_input .= "set output\n";
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $gnuplot_input .= "set term postscript eps monochrome solid \"Helvetica\" 25 \n";   $gnuplot_input .= "set term postscript eps monochrome solid \"Helvetica\" $pt \n";
  $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".   $gnuplot_input .= "set output \"/home/httpd/perl/tmp/".
     &Apache::lonnet::unescape($filename).".eps\"\n";      &Apache::lonnet::unescape($filename).".eps\"\n";
     }      }
Line 1055  sub write_gnuplot_file { Line 986  sub write_gnuplot_file {
     # title, xlabel, ylabel      # title, xlabel, ylabel
     # titles      # titles
     if ($target eq 'tex') {      if ($target eq 'tex') {
         $gnuplot_input .= "set title  \"$title\" font \"Helvetica,25pt\"\n"  if (defined($title)) ;          $gnuplot_input .= "set title  \"$title\" font \"Helvetica,".$pt."pt\"\n"  if (defined($title)) ;
         $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,25pt\" \n" if (defined($xlabel));          $gnuplot_input .= "set xlabel \"$xlabel\" font \"Helvetica,".$pt."pt\" \n" if (defined($xlabel));
         $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,25pt\"\n" if (defined($ylabel));          $gnuplot_input .= "set ylabel \"$ylabel\" font \"Helvetica,".$pt."pt\"\n" if (defined($ylabel));
     } else {      } else {
         $gnuplot_input .= "set title  \"$title\"  \n"  if (defined($title)) ;          $gnuplot_input .= "set title  \"$title\"  \n"  if (defined($title)) ;
         $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));          $gnuplot_input .= "set xlabel \"$xlabel\" \n" if (defined($xlabel));
Line 1103  sub write_gnuplot_file { Line 1034  sub write_gnuplot_file {
     my $label;      my $label;
     foreach $label (@labels) {      foreach $label (@labels) {
  $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.   $gnuplot_input .= 'set label "'.$label->{'text'}.'" at '.
     $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.' font "Helvetica,25pt"'.$/ ;      $label->{'xpos'}.','.$label->{'ypos'}.' '.$label->{'justify'}.' font "Helvetica,'.$pt.'pt"'.$/ ;
     }      }
     if ($target eq 'tex') {      if ($target eq 'tex') {
         $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;          $gnuplot_input .="set size 1,".$plot{'height'}/$plot{'width'}*1.38;
Line 1337  sub insert_data { Line 1268  sub insert_data {
 }  }
   
 ##----------------------------------------------------------------------  ##----------------------------------------------------------------------
 # 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;  1;
 __END__  __END__
   
Removed from v.1.91  
changed lines
  Added in v.1.96

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