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    1: # The LearningOnline Network with CAPA
    2: # random labelling tool
    3: # 7/20/2001 Isaac Tsai
    4: # 8/10/2001 Isaac Tsai
    5: # SYNTAX:
    6: # <randomlabel bgimg=URL code=JAVACLASS codebase=URL width=12 height=45>
    7: #    <labelgroup name=GroupOne type=image>
    8: #      <location x=123 y=456 />
    9: #      <location x=321 y=654 />
   10: #      <location x=213 y=546 />
   11: #      <label>IMG-URL</label>
   12: #      <label>IMG-URL</label>
   13: #      <label>IMG-URL</label>
   14: #    </labelgroup>
   15: #    <labelgroup name=GroupTwo type=text>
   16: #      <location x=12 y=45 />
   17: #      <location x=32 y=65 />
   18: #      <location x=21 y=54 />
   19: #      <label>TEXT</label>
   20: #      <label>TEXT</label>
   21: #      <label>TEXT</label>
   22: #    </labelgroup>
   23: #   </randomlabel>
   24: #  ===========================================
   25: #    location (123,456): $GroupOne[1] = ...
   26: #             (321,654): $GroupOne[2] = ...
   27: #             (213,546): $GroupOne[3] = ...
   28: #    location (12,45)  : $GroupOne[1] = ...
   29: #             (321,654): $GroupOne[2] = ...
   30: #             (213,546): $GroupOne[3] = ...
   31: #  ===========================================
   32: package Apache::randomlabel;
   33: use strict;
   34: 
   35: sub BEGIN {
   36:   &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
   37: }
   38: 
   39: sub start_randomlabel {
   40:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   41:   my $result='';
   42:   my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
   43:   my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
   44:   my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
   45:   my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
   46:   my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
   47:   
   48:   $result.="<applet code=$code codebase=$codebase width=\"$w\" height=\"$h\">";
   49:   $result.="<param name=\"bgimg\" value=\"$bgimg\">";
   50:   if ($target eq 'edit') {
   51:   }
   52:   if ($target eq 'modified') {
   53:   }
   54:   return $result;
   55: }
   56: 
   57: sub end_randomlabel {
   58:   return '</applet><BR />';
   59: }
   60: 
   61: sub start_labelgroup {
   62:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   63:   my $result='';
   64:   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
   65:   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
   66:   $type =~tr/A-Z/a-z/;
   67:   $Apache::randomlabel::groupname=$name;
   68:   $Apache::randomlabel::type=$type;
   69:   @Apache::randomlabel::xcoord = ();
   70:   @Apache::randomlabel::ycoord = ();
   71:   @Apache::randomlabel::label_arr  = ();
   72:   return '';
   73: }
   74: 
   75: # begin to assign labels to locations
   76: sub end_labelgroup {
   77:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   78:   my $gname = $Apache::randomlabel::groupname;
   79:   my $count = $#Apache::randomlabel::label_arr + 1;
   80:   my $type  = $Apache::randomlabel::type;
   81:   my $code;
   82:   my $out;
   83:   my $label;
   84:   my $x;
   85:   my $y;
   86:   my $text;
   87:   my $str;
   88:   my $xstr;
   89:   my $ystr;
   90: 
   91:   if( $type eq 'text') {
   92:     $text= "<param name=\"count\" value=\"$count\">";
   93:     $str = 'LB';
   94:     $xstr = 'X';
   95:     $ystr = 'Y';
   96:   }
   97:   if( $type eq 'image') {
   98:     $text= "<param name=\"icount\" value=\"$count\">";
   99:     $str = 'IMG';
  100:     $xstr = 'IX';
  101:     $ystr = 'IY';
  102:   }
  103:   my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
  104:   &Apache::structuretags::shuffle(\@idx_arr);
  105:   for(0 .. $#Apache::randomlabel::label_arr) {
  106:     $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
  107:     $x = pop @Apache::randomlabel::xcoord;
  108:     $y = pop @Apache::randomlabel::ycoord;
  109:     $text .= "<param name=\"" . $str  . $_ . "\" value=\"$label\">";
  110:     $text .= "<param name=\"" . $xstr . $_ . "\" value=\"$x\"> ";
  111:     $text .= "<param name=\"" . $ystr . $_ . "\" value=\"$y\">";
  112:     $code = "push(\@$gname, $label);" ;
  113:     $out=Apache::run::run($code,$safeeval);
  114:   }
  115:   
  116:   return $text;
  117: }
  118: 
  119: # <location x=123 y=456 />
  120: sub start_location {
  121:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  122:   my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
  123:   my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
  124:   
  125:   push(@Apache::randomlabel::xcoord,$x);
  126:   push(@Apache::randomlabel::ycoord,$y); 
  127:   return '';
  128: }
  129: 
  130: sub end_location {
  131:   return '';
  132: }
  133: 
  134: # <label>$var_abc</label>
  135: sub start_label {
  136:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  137:   my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[$#$parser]);
  138: 
  139:   push(@Apache::randomlabel::label_arr,$ltext);
  140:   return '';
  141: }
  142: 
  143: sub end_label {
  144:   return '';
  145: }
  146: 
  147: 
  148: 
  149: 1;
  150: __END__
  151: