Annotation of loncom/homework/drawimage.pm, revision 1.5

1.1       albertel    1: # The LearningOnline Network with CAPA
                      2: # programatic image drawing
                      3: #
1.5     ! albertel    4: # $Id: drawimage.pm,v 1.4 2004/03/16 22:27:37 matthew 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)=@_;
1.5     ! albertel   41:     &Apache::lonxml::register('Apache::drawimage',('text','line','rectangle','arc','fill'));
1.1       albertel   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'));
1.4       matthew    72:     return $result;
                     73: }
                     74: 
1.5     ! albertel   75: sub start_text {
1.4       matthew    76:     my ($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);
1.5     ! albertel   83:         my $direction = &Apache::lonxml::get_param('direction',$parstack,$safeeval);
        !            84: 	my $text  = &Apache::lonxml::get_all_text("/text",$parser);
1.4       matthew    85:         $text = &Apache::lonnet::escape($text);
                     86:         $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
                     87: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.5     ! albertel   88: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$text,$font,$color,$direction));
1.4       matthew    89:     }
                     90:     return $result;
                     91: }
                     92: 
1.5     ! albertel   93: sub end_text {
1.4       matthew    94:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     95:     my $result;
1.1       albertel   96:     return $result;
                     97: }
                     98: 
                     99: sub start_line {
                    100:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    101:     my $result;
                    102:     if ($target eq 'web' || $target eq 'tex') {
                    103: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
                    104: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
                    105: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
                    106: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
                    107: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    108: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
1.3       albertel  109: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  110: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness));
                    111: 	$args{"cgi.$cgi_id.OBJTYPE"}.='LINE:';
                    112:     }
                    113:     return $result;
                    114: }
                    115: 
                    116: sub end_line {
                    117:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    118:     my $result;
                    119:     return $result;
                    120: }
                    121: 
                    122: sub start_rectangle {
                    123:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    124:     my $result;
                    125:     if ($target eq 'web' || $target eq 'tex') {
                    126: 	my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval);
                    127: 	my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval);
                    128: 	my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval);
                    129: 	my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval);
                    130: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    131: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,
                    132: 						   $safeeval);
                    133: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,
                    134: 						$safeeval);
1.3       albertel  135: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  136: 	$args{"cgi.$cgi_id.OBJ$i"}=
                    137: 	    join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled));
                    138: 	$args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:';
                    139:     }
                    140:     return $result;
                    141: }
                    142: 
                    143: sub end_rectangle {
                    144:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    145:     my $result;
                    146:     return $result;
                    147: }
                    148: 
                    149: sub start_arc {
                    150:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    151:     my $result;
                    152:     if ($target eq 'web' || $target eq 'tex') {
                    153: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    154: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    155: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
                    156: 	my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval);
                    157: 	my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval);
                    158: 	my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval);
                    159: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
                    160: 	my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval);
                    161: 	my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval);
1.3       albertel  162: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  163: 	$args{"cgi.$cgi_id.OBJ$i"}=
                    164: 	    join(':',($x,$y,$width,$height,$start,$end,$color,$thickness,
                    165: 		      $filled));
                    166: 	$args{"cgi.$cgi_id.OBJTYPE"}.='ARC:';
                    167:     }
                    168:     return $result;
                    169: }
                    170: 
                    171: sub end_arc {
                    172:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    173:     my $result;
                    174:     return $result;
                    175: }
                    176: 
1.2       albertel  177: sub start_fill {
1.1       albertel  178:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    179:     my $result;
                    180:     if ($target eq 'web' || $target eq 'tex') {
                    181: 	my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval);
                    182: 	my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval);
                    183: 	my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval);
1.3       albertel  184: 	my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++;
1.1       albertel  185: 	$args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color));
                    186: 	$args{"cgi.$cgi_id.OBJTYPE"}.='FILL:';
                    187:     }
                    188:     return $result;
                    189: }
                    190: 
1.2       albertel  191: sub end_fill {
1.1       albertel  192:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    193:     my $result;
                    194:     return $result;
                    195: }
                    196: 
                    197: 
                    198: 1;
                    199: __END__

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