Annotation of loncom/homework/drawimage.pm, revision 1.3

1.1       albertel    1: # The LearningOnline Network with CAPA
                      2: # programatic image drawing
                      3: #
1.3     ! albertel    4: # $Id: drawimage.pm,v 1.2 2004/02/23 23:29:14 albertel Exp $
1.1       albertel    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);
1.3     ! albertel   85: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel   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);
1.3     ! albertel  111: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  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);
1.3     ! albertel  138: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  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 $result;
                    151: }
                    152: 
1.2       albertel  153: sub start_fill {
1.1       albertel  154:     my ($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);
1.3     ! albertel  160: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  161: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
                    162: 	$args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
                    163:     }
                    164:     return $result;
                    165: }
                    166: 
1.2       albertel  167: sub end_fill {
1.1       albertel  168:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    169:     my $result;
                    170:     return $result;
                    171: }
                    172: 
                    173: 
                    174: 1;
                    175: __END__

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