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Diff for /loncom/homework/randomlabel.pm between versions 1.76 and 1.77

version 1.76, 2005/05/31 22:14:32 version 1.77, 2005/06/07 22:31:30
Line 67  my $cgi_id; Line 67  my $cgi_id;
 my $scale_factor; # image scale factor.  my $scale_factor; # image scale factor.
 my $label_xscale;                # Label scale factor (needed for gnuplot).  my $label_xscale;                # Label scale factor (needed for gnuplot).
 my $label_yscale;  my $label_yscale;
 my $gnuplot_background; # This will be true if a gnuplot backgound  
   
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));      &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
 }  }
   
 # Gnuplot calback called if a </gnuplot> tag is encountered:  
 #  
 sub gnuplot_handler {  
     $gnuplot_background = 1;  
 }  
   
 sub check_int {  sub check_int {
     # utility function to do error checking on a integer.      # utility function to do error checking on a integer.
Line 92  sub check_int { Line 87  sub check_int {
     return $num;      return $num;
 }  }
   
   #  Get width/height from an image tag...
   #
   #  Parameters:
   #      tag         - tag potentially containing height/width attributes.
   #      def_width   - Default width.
   #      def_height  - Default height.
   #  Returns:
   #      list containing width/height.
   #
   sub extract_tag_sizes {
       my ($tag, $dw, $dh) = @_;
       $tag =~ s/\s+/ /g;         # Collapse whitespace.
       $tag =~ s/\s*=\s*/=/g;     # kill space around ='s.
       $tag =~ s/[<>\"]//g;       # Get rid of the <">'s too.
   
       &Apache::lonxml::debug("Compressed tag: $tag");
       my @taglist = split(/ /,$tag);
       foreach my $attribute (@taglist) {
    if ($attribute =~ /^width/i) {
       my ($e, $s)= split(/=/,$attribute);
       $dw = $s;
    }
    if ($attribute =~  /^height/i) {
       my ($e, $s) = split(/=/,$attribute);
       $dh = $s;
    }
       } 
       return($dw, $dh);
   
   }
   
 my ($height_param,$width_param);  my ($height_param,$width_param);
 sub start_randomlabel {  sub start_randomlabel {
   
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $gnuplot_background = 0;  
     &Apache::lonplot::register_callback(\&gnuplot_handler);  
     my $result='';      my $result='';
     push (@Apache::lonxml::namespace,'randomlabel');      push (@Apache::lonxml::namespace,'randomlabel');
     ($height_param,$width_param)=(0,0);      ($height_param,$width_param)=(0,0);
Line 159  sub end_randomlabel { Line 183  sub end_randomlabel {
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::end_table;   $result.=&Apache::edit::end_table;
     }      }
     &Apache::lonplot::clear_callback();  
     return $result;      return $result;
 }  }
   
   
 sub start_bgimg {  sub start_bgimg {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
Line 178  sub end_bgimg { Line 202  sub end_bgimg {
     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
  my $bgimg=&Apache::lonxml::endredirection();    my $bgimg=&Apache::lonxml::endredirection(); 
  if ($target eq 'web') {   if ($target eq 'web') {
     # Try to determine  if this is a gnu plot image in which       
     # case it's size overrides the web size.      # If the  tag produced has sizes, they override ours.
     #    If it's a gnuplot the uncleaned image will have      # (for now anyway).
     #    the text "dynamically generated plot"      #
     #    and "cgi-bin/plot.gif?"  
     if ( $gnuplot_background) {      &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
  &Apache::lonxml::debug("Gnuplot image!");  
  my $plot_x = $Apache::lonplot::plot{'width'};      my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg, 
  my $plot_y = $Apache::lonplot::plot{'height'};         $width_param,
  &Apache::lonxml::debug(" H = $plot_y W = $plot_x");         $height_param );
  &Apache::lonxml::debug("PH = $height_param, PW = $width_param");      &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
  $label_xscale = $plot_x/$width_param;      $label_xscale         = $plot_x / $width_param;
  $label_yscale = $plot_y/$height_param;      $label_yscale         = $plot_y / $height_param;
     }      &Apache::lonxml::debug("Scale factors:   $label_xscale $label_yscale");
   
     &Apache::lonxml::debug("Image: $bgimg");      &Apache::lonxml::debug("Image: $bgimg");
     $bgimg=&Apache::imageresponse::clean_up_image($bgimg);      $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
     &Apache::lonxml::debug("Cleaned image: $bgimg");      &Apache::lonxml::debug("Cleaned image: $bgimg");
Line 205  sub end_bgimg { Line 230  sub end_bgimg {
     my $src = $bgimg;      my $src = $bgimg;
     $src =~ s/\s+$//s;      $src =~ s/\s+$//s;
     $src =~ s/^\s+//s;      $src =~ s/^\s+//s;
       
   
     if ($gnuplot_background) {      #If this is a dynamically generated image, it will
         $height_param = $Apache::lonplot::plot{'height'};      #be in latex already, with a comment header that
  my $initial_width= $Apache::lonplot::plot{'width'};      #describes the dimensions:
  $width_param  = $Apache::lonplot::plot{'texwidth'};  
       if($src =~ /^%DYNAMICIMAGE:/) {
    $Apache::lonxml::debug = 0;
    &Apache::lonxml::debug("Dynamic image");
    my ($commentline, $junk) = split(/\n/, $src);
    &Apache::lonxml::debug("Comment line was: $commentline");
    my $trash;
    my $initial_width;
    ($trash, $initial_width, $height_param, $width_param) =
       split(/:/,$commentline);
    &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
    &Apache::lonxml::debug("Texwitdh: $width_param");
    if($initial_width == 0) {
       $initial_width = $width_param;
    }
    # strip off the comments since output does not always
    # preserve \n's:
                   #
    $src =~ s/$commentline//;
  $scale_factor = $width_param / $initial_width;   $scale_factor = $width_param / $initial_width;
  $height_param = $height_param*$scale_factor;   $height_param = $height_param*$scale_factor;
   
    $label_xscale = 1.0; #  $scale_factor;
    $label_yscale = 1.0; #  $scale_factor;
      
  &Apache::lonxml::debug("height $height_param");   &Apache::lonxml::debug("height $height_param");
  &Apache::lonxml::debug("Width $width_param");   &Apache::lonxml::debug("Width $width_param");
    &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
  my $dirty_width = $width_param + 5;   my $dirty_width = $width_param + 5;
  $result .= '\parbox{'.$dirty_width.'mm}{';   $result .= '\parbox{'.$dirty_width.'mm}{';
  $result  .= $src."\n";   $result  .= " $src \n";
  $result  .= '\setlength{\unitlength}{1mm}'."\n";   $result  .= '\setlength{\unitlength}{1mm}'."\n";
  $result  .= '\begin{picture}('."$height_param,$width_param)";   $result  .= '\begin{picture}('."$height_param,$width_param)";
  $result  .= "(0,-$height_param)";   $result  .= "(0,-$height_param)";
  $result  .= "\n";   $result  .= "\n";
    $Apache::lonxml::debug = 0;
   
     } else {      } else {
   
Line 384  sub end_labelgroup { Line 431  sub end_labelgroup {
  &Apache::structuretags::shuffle(\@idx_arr);   &Apache::structuretags::shuffle(\@idx_arr);
   
  &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");   &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
    $Apache::lonxml::debug = 0;
  for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {   for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
     my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";      my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
     my $x = $Apache::randomlabel::xcoord[$i];      my $x = $Apache::randomlabel::xcoord[$i];
     # FIXME the 3.5 here is the 'height' of the letter in TeX      # FIXME the 3.5 here is the 'height' of the letter in TeX
     my $y = $Apache::randomlabel::ycoord[$i]-3.5;      my $y = $Apache::randomlabel::ycoord[$i]-3.5;
       &Apache::lonxml::debug("initially: x= $x y= $y");
     my $value = $Apache::randomlabel::value[$i];      my $value = $Apache::randomlabel::value[$i];
     #x latex coordinate      #x latex coordinate
     my $tcX=($x)*($width_param/$wwidth);      my $tcX=($x)*($width_param/$wwidth);
       &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
     #y latex coordinate      #y latex coordinate
             #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );              #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
     my $tcY=$height_param-$y*($height_param/$wheight);      my $tcY=$height_param-$y*($height_param/$wheight);
       &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
     $tcX=sprintf('%.2f',$tcX);      $tcX=sprintf('%.2f',$tcX);
     $tcY=sprintf('%.2f',$tcY);      $tcY=sprintf('%.2f',$tcY);
     $result .= '\put('.$tcX.','.$tcY.'){';      $result .= '\put('.$tcX.','.$tcY.'){';
Line 415  sub end_labelgroup { Line 466  sub end_labelgroup {
  &Apache::lonxml::error('Unknown type of label :'.$type.':');   &Apache::lonxml::error('Unknown type of label :'.$type.':');
     }      }
  }   }
    $Apache::lonxml::debug =0;
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::end_table;   $result.=&Apache::edit::end_table;
     }      }
Line 423  sub end_labelgroup { Line 475  sub end_labelgroup {
   
 # <location x="123" y="456" value="some value"/>  # <location x="123" y="456" value="some value"/>
 sub start_location {  sub start_location {
       $Apache::lonxml::debug = 0;
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);      my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
     my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);      my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
Line 453  sub start_location { Line 506  sub start_location {
     $result.=&Apache::edit::handle_insert();      $result.=&Apache::edit::handle_insert();
  }   }
     }      }
       $Apache::lonxml::debug = 0;
     return $result;      return $result;
 }  }
   
Removed from v.1.76  
changed lines
  Added in v.1.77

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