Return to drawimage.pm CVS log

Up to [LON-CAPA] / loncom / homework

- first pass at a <drawimage> tag probalby not great and it needs a new version of randomlylabel.pm to work

    1: # The LearningOnline Network with CAPA
    2: # programatic image drawing
    3: #
    4: # $Id: drawimage.pm,v 1.1 2003/11/15 06:33:39 albertel 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',('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 $result;
   73: }
   74: 
   75: sub start_line {
   76:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   77:     my $result;
   78:     if ($target eq 'web' || $target eq 'tex') {
   79: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
   80: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
   81: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
   82: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
   83: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
   84: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
   85: 	my $i=(++$args{"cgi.$cgi_id.OBJCOUNT"})-1;
   86: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness));
   87: 	$args{"cgi.$cgi_id.OBJTYPE"}.='LINE:';
   88:     }
   89:     return $result;
   90: }
   91: 
   92: sub end_line {
   93:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   94:     my $result;
   95:     return $result;
   96: }
   97: 
   98: sub start_rectangle {
   99:     my ($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,
  108: 						   $safeeval);
  109: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,
  110: 						$safeeval);
  111: 	my $i=(++$args{"cgi.$cgi_id.OBJCOUNT"})-1;
  112: 	$args{"cgi.$cgi_id.OBJ$i"}=
  113: 	    join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled));
  114: 	$args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:';
  115:     }
  116:     return $result;
  117: }
  118: 
  119: sub end_rectangle {
  120:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  121:     my $result;
  122:     return $result;
  123: }
  124: 
  125: sub start_arc {
  126:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  127:     my $result;
  128:     if ($target eq 'web' || $target eq 'tex') {
  129: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
  130: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
  131: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
  132: 	my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval);
  133: 	my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval);
  134: 	my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval);
  135: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  136: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
  137: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval);
  138: 	my $i=(++$args{"cgi.$cgi_id.OBJCOUNT"})-1;
  139: 	$args{"cgi.$cgi_id.OBJ$i"}=
  140: 	    join(':',($x,$y,$width,$height,$start,$end,$color,$thickness,
  141: 		      $filled));
  142: 	$args{"cgi.$cgi_id.OBJTYPE"}.='ARC:';
  143:     }
  144:     return $result;
  145: }
  146: 
  147: sub end_arc {
  148:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  149:     my $result;
  150:     return $result;
  151: }
  152: 
  153: sub start_arc {
  154:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  155:     my $result;
  156:     if ($target eq 'web' || $target eq 'tex') {
  157: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
  158: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
  159: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
  160: 	my $i=(++$args{"cgi.$cgi_id.OBJCOUNT"})-1;
  161: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
  162: 	$args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
  163:     }
  164:     return $result;
  165: }
  166: 
  167: sub end_arc {
  168:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  169:     my $result;
  170:     return $result;
  171: }
  172: 
  173: 
  174: 1;
  175: __END__