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Diff for /loncom/homework/randomlabel.pm between versions 1.92 and 1.93

version 1.92, 2008/11/18 19:14:28 version 1.93, 2008/11/25 13:16:17
Line 24 Line 24
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  
 # SYNTAX:  =pod
 # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">  
 #    <labelgroup name="GroupOne" type="image">  =head1 NAME
 #      <location x="123" y="456" />  
 #      <location x="321" y="654" />  Apache::randomlable.pm
 #      <location x="213" y="546" />  
 #      <label description="TEXT-1">IMG-URL</label>  =head1 SYNOPSIS
 #      <label description="TEXT-2">IMG-URL</label>  
 #      <label description="TEXT-3">IMG-URL</label>  Interface for producing applet code which
 #    </labelgroup>  randomizes the labelling of an image.
 #    <labelgroup name="GroupTwo" type="text">  
 #      <location x="12" y="45" />  This is part of the LearningOnline Network with CAPA project
 #      <location x="32" y="65" />  described at http://www.lon-capa.org.
 #      <location x="21" y="54" />  
 #      <label>TEXT-1</label>  
 #      <label>TEXT-2</label>  =head1 SYNTAX
 #      <label>TEXT-3</label>  
 #    </labelgroup>   <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
 #   </randomlabel>      <labelgroup name="GroupOne" type="image">
 #  ===========================================        <location x="123" y="456" />
 #  side effect:        <location x="321" y="654" />
 #    location (123,456): $GroupOne[0] = 2  # images give out indexes        <location x="213" y="546" />
 #             (321,654): $GroupOne[1] = 1        <label description="TEXT-1">IMG-URL</label>
 #             (213,546): $GroupOne[2] = 0        <label description="TEXT-2">IMG-URL</label>
 #    location (12,45)  : $GroupTwo[0] = "TEXT-3"        <label description="TEXT-3">IMG-URL</label>
 #             (32,65)  : $GroupTwo[1] = "TEXT-1"      </labelgroup>
 #             (21,54)  : $GroupTwo[2] = "TEXT-2"      <labelgroup name="GroupTwo" type="text">
 #  ===========================================        <location x="12" y="45" />
         <location x="32" y="65" />
         <location x="21" y="54" />
         <label>TEXT-1</label>
         <label>TEXT-2</label>
         <label>TEXT-3</label>
       </labelgroup>
      </randomlabel>
     ===========================================
     side effect:
       location (123,456): $GroupOne[0] = 2   images give out indexes
                (321,654): $GroupOne[1] = 1
                (213,546): $GroupOne[2] = 0
       location (12,45)  : $GroupTwo[0] = "TEXT-3"
                (32,65)  : $GroupTwo[1] = "TEXT-1"
                (21,54)  : $GroupTwo[2] = "TEXT-2"
     ===========================================
   
   
   =head1 NOTABLE SUBROUTINES
   
   =over
   
   =item check_int()
   
    utility function to do error checking on a integer.
   
   =item extract_tag_sizes()
   
   Parameters:
         tag         - tag potentially containing height/width attributes.
         def_width   - Default width.
         def_height  - Default height.
     Returns:
         list containing width/height.
   
   =item get_label_width()
   
    Utility sub to compute the width of a label.
     
   =item end_labelgroup()
   
   begin to assign labels to locations
   
   =back
   
   =cut
   
   
   
 package Apache::randomlabel;  package Apache::randomlabel;
 use Apache::lonnet;  use Apache::lonnet;
Line 90  sub check_int { Line 138  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 {  sub extract_tag_sizes {
     my ($tag, $dw, $dh) = @_;      my ($tag, $dw, $dh) = @_;
     $tag =~ s/\s+/ /g;         # Collapse whitespace.      $tag =~ s/\s+/ /g;         # Collapse whitespace.
Line 359  sub start_labelgroup { Line 400  sub start_labelgroup {
     return $result;      return $result;
 }  }
   
 #  
 #   Utility sub to compute the width of a label.  
 #  
 sub get_label_width {  sub get_label_width {
     my $label         = shift;      my $label         = shift;
     &Apache::lonxml::debug("image label = $label");      &Apache::lonxml::debug("image label = $label");
Line 411  sub add_vars { Line 451  sub add_vars {
     $out=Apache::run::run($code,$safeeval);      $out=Apache::run::run($code,$safeeval);
 }  }
   
 # begin to assign labels to locations  
   
 sub end_labelgroup {  sub end_labelgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $gname = $Apache::randomlabel::groupname;      my $gname = $Apache::randomlabel::groupname;
Removed from v.1.92  
changed lines
  Added in v.1.93

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