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Added text support.

    1: # The LearningOnline Network with CAPA
    2: # programatic image drawing
    3: #
    4: # $Id: drawimage.pm,v 1.4 2004/03/16 22:27:37 matthew Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: 
   29: package Apache::drawimage;
   30: use strict;
   31: use Apache::loncommon;
   32: 
   33: my %args;
   34: my $cgi_id;
   35: BEGIN {
   36:     &Apache::lonxml::register('Apache::drawimage',('drawimage'));
   37: }
   38: 
   39: sub start_drawimage {
   40:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   41:     &Apache::lonxml::register('Apache::drawimage',('textlabel','line','rectangle','arc','fill'));
   42:     if ($target eq 'web' || $target eq 'tex') {
   43: 	$cgi_id=&Apache::loncommon::get_cgi_id();
   44: 	%args=();
   45:     }
   46: }
   47: 
   48: sub end_drawimage {
   49:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   50:     my $result;
   51:     if ($target eq 'web' || $target eq 'tex') {
   52: 	if ($target eq 'web') {
   53: 	    my $width = 
   54: 		&Apache::lonxml::get_param('width',$parstack,$safeeval);
   55: 	    my $height =
   56: 		&Apache::lonxml::get_param('height',$parstack,$safeeval);
   57: 	    my $bgcolor =
   58: 		&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
   59: 	    if (!$width) { $width=300; }
   60: 	    if (!$height) { $height=300; }
   61: 	    $result.="<img width='$width' height='$height'
   62:                            src='/adm/randomlabel.png?token=$cgi_id' />\n";
   63: 	    $args{"cgi.$cgi_id.SIZE"}=join(':',($width,$height));
   64: 	    $args{"cgi.$cgi_id.BGCOLOR"}=join(':',($bgcolor));
   65: 	    &Apache::lonnet::appenv(%args);
   66: 	} elsif ($target eq 'tex') {
   67: 	    #FIXME generate image some how
   68: 	    #probably Simple::PostScript
   69: 	}
   70:     }
   71:     &Apache::lonxml::deregister('Apache::drawimage',('line','rectangle'));
   72:     return $result;
   73: }
   74: 
   75: sub start_textlabel {
   76:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   77:     my $result;
   78:     if ($target eq 'web' || $target eq 'tex') {
   79:         my $x     = &Apache::lonxml::get_param('x',$parstack,$safeeval);
   80:         my $y     = &Apache::lonxml::get_param('y',$parstack,$safeeval);
   81:         my $font  = &Apache::lonxml::get_param('font',$parstack,$safeeval);
   82:         my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
   83: 	my $text  = &Apache::lonxml::get_all_text("/textlabel",$parser);
   84:         $text = &Apache::lonnet::escape($text);
   85:         $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
   86: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
   87: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$text,$font,$color));
   88:     }
   89:     return $result;
   90: }
   91: 
   92: sub end_textlabel {
   93:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   94:     my $result;
   95:     return $result;
   96: }
   97: 
   98: sub start_line {
   99:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  100:     my $result;
  101:     if ($target eq 'web' || $target eq 'tex') {
  102: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
  103: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
  104: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
  105: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
  106: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  107: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
  108: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
  109: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness));
  110: 	$args{"cgi.$cgi_id.OBJTYPE"}.='LINE:';
  111:     }
  112:     return $result;
  113: }
  114: 
  115: sub end_line {
  116:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  117:     my $result;
  118:     return $result;
  119: }
  120: 
  121: sub start_rectangle {
  122:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  123:     my $result;
  124:     if ($target eq 'web' || $target eq 'tex') {
  125: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
  126: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
  127: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
  128: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
  129: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  130: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
  131: 						   $safeeval);
  132: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,
  133: 						$safeeval);
  134: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
  135: 	$args{"cgi.$cgi_id.OBJ$i"}=
  136: 	    join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled));
  137: 	$args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:';
  138:     }
  139:     return $result;
  140: }
  141: 
  142: sub end_rectangle {
  143:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  144:     my $result;
  145:     return $result;
  146: }
  147: 
  148: sub start_arc {
  149:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  150:     my $result;
  151:     if ($target eq 'web' || $target eq 'tex') {
  152: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
  153: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
  154: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
  155: 	my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval);
  156: 	my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval);
  157: 	my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval);
  158: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  159: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
  160: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval);
  161: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
  162: 	$args{"cgi.$cgi_id.OBJ$i"}=
  163: 	    join(':',($x,$y,$width,$height,$start,$end,$color,$thickness,
  164: 		      $filled));
  165: 	$args{"cgi.$cgi_id.OBJTYPE"}.='ARC:';
  166:     }
  167:     return $result;
  168: }
  169: 
  170: sub end_arc {
  171:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  172:     my $result;
  173:     return $result;
  174: }
  175: 
  176: sub start_fill {
  177:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  178:     my $result;
  179:     if ($target eq 'web' || $target eq 'tex') {
  180: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
  181: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
  182: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  183: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
  184: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
  185: 	$args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
  186:     }
  187:     return $result;
  188: }
  189: 
  190: sub end_fill {
  191:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  192:     my $result;
  193:     return $result;
  194: }
  195: 
  196: 
  197: 1;
  198: __END__