Annotation of loncom/homework/imageresponse.pm, revision 1.69

1.58      albertel    1: 
1.12      albertel    2: # The LearningOnline Network with CAPA
1.14      albertel    3: # image click response style
                      4: #
1.69    ! foxr        5: # $Id: imageresponse.pm,v 1.68 2005/05/10 11:24:01 foxr Exp $
1.14      albertel    6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
                     28: #
1.25      www        29: #FIXME LATER assumes multiple possible submissions but only one is possible 
                     30: #currently
1.3       albertel   31: 
1.1       albertel   32: package Apache::imageresponse;
                     33: use strict;
1.51      albertel   34: use Image::Magick();
                     35: use Apache::randomlylabel();
                     36: use Apache::londefdef();
1.40      albertel   37: use Apache::Constants qw(:common :http);
1.51      albertel   38: use Apache::lonlocal;
1.65      albertel   39: use Apache::lonnet;
1.1       albertel   40: 
1.16      harris41   41: BEGIN {
1.36      albertel   42:     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
1.1       albertel   43: }
                     44: 
                     45: sub start_imageresponse {
1.36      albertel   46:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     47:     my $result;
                     48:     #when in a radiobutton response use these
1.43      albertel   49:     &Apache::lonxml::register('Apache::imageresponse',
                     50: 			      ('foilgroup','foil','text','image','rectangle',
                     51: 			       'polygon','conceptgroup'));
1.36      albertel   52:     push (@Apache::lonxml::namespace,'imageresponse');
                     53:     my $id = &Apache::response::start_response($parstack,$safeeval);
1.51      albertel   54:     undef(%Apache::response::foilnames);
1.36      albertel   55:     if ($target eq 'meta') {
                     56: 	$result=&Apache::response::meta_package_write('imageresponse');
1.37      albertel   57:     } elsif ($target eq 'analyze') {
                     58: 	my $part_id="$Apache::inputtags::part.$id";
                     59: 	push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.36      albertel   60:     }
                     61:     return $result;
1.1       albertel   62: }
                     63: 
                     64: sub end_imageresponse {
1.30      albertel   65:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     66:     &Apache::response::end_response;
                     67:     pop @Apache::lonxml::namespace;
                     68:     &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
                     69:     my $result;
                     70:     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.51      albertel   71:     undef(%Apache::response::foilnames);
1.30      albertel   72:     return $result;
1.1       albertel   73: }
                     74: 
1.20      albertel   75: %Apache::response::foilgroup=();
1.1       albertel   76: sub start_foilgroup {
1.36      albertel   77:     %Apache::response::foilgroup=();
                     78:     $Apache::imageresponse::conceptgroup=0;
1.53      albertel   79:     &Apache::response::pushrandomnumber();
1.36      albertel   80:     return '';
1.1       albertel   81: }
                     82: 
1.2       albertel   83: sub getfoilcounts {
1.36      albertel   84:     my ($parstack,$safeeval)=@_;
1.12      albertel   85: 
1.36      albertel   86:     my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
                     87:     # +1 since instructors will count from 1
                     88:     my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
1.56      albertel   89:     #if (&Apache::response::showallfoils()) { $max=$count; }
1.36      albertel   90:     return ($count,$max);
1.2       albertel   91: }
                     92: 
                     93: sub whichfoils {
1.36      albertel   94:     my ($max)=@_;
                     95:     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
                     96:     my @names = @{ $Apache::response::foilgroup{'names'} };
                     97:     my @whichopt =();
                     98:     while ((($#whichopt+1) < $max) && ($#names > -1)) {
                     99: 	&Apache::lonxml::debug("Have $#whichopt max is $max");
                    100: 	my $aopt;
1.56      albertel  101: #	if (&Apache::response::showallfoils()) {
                    102: #	    $aopt=0;
                    103: #	} else {
1.36      albertel  104: 	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
1.56      albertel  105: #	}
1.36      albertel  106: 	&Apache::lonxml::debug("From $#names elms, picking $aopt");
                    107: 	$aopt=splice(@names,$aopt,1);
                    108: 	&Apache::lonxml::debug("Picked $aopt");
                    109: 	push (@whichopt,$aopt);
                    110:     }
                    111:     return @whichopt;
1.2       albertel  112: }
                    113: 
1.40      albertel  114: sub prep_image {
1.42      albertel  115:     my ($image,$mode,$name)=@_;
1.40      albertel  116:     my $part=$Apache::inputtags::part;
1.41      albertel  117:     my $respid=$Apache::inputtags::response['-1'];
                    118:     my $id=&Apache::loncommon::get_cgi_id();
1.49      albertel  119:     my (%x,$i);
1.47      albertel  120:     $x{"cgi.$id.BGIMG"}=&Apache::lonnet::escape($image);
1.41      albertel  121:     my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
1.40      albertel  122:     #draws 2 xs on the image at the clicked location
                    123:     #one in white and then one in red on top of the one in white
1.58      albertel  124:     if (defined($x) && $x=~/\S/ && defined($y) && $y =~/\S/ && !&Apache::response::show_answer()) {
1.40      albertel  125: 	my $length = 6;
                    126: 	my $width = 1;
                    127: 	my $extrawidth = 2;
1.48      albertel  128: 	my $xmin=($x-$length);
                    129: 	my $xmax=($x+$length); 
                    130: 	my $ymin=($y-$length);
                    131: 	my $ymax=($y+$length);
                    132: 
1.49      albertel  133: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    134: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  135: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49      albertel  136: 				      "FFFFFF",($width+$extrawidth)));
                    137: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    138: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  139: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49      albertel  140: 				      "FFFFFF",($width+$extrawidth)));
                    141: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    142: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  143: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49      albertel  144: 				      "FF0000",($width)));
                    145: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    146: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  147: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49      albertel  148: 				      "FF0000",($width)));
1.40      albertel  149:     }
1.42      albertel  150:     if ($mode eq 'answer') {
                    151: 	my $width = 1;
                    152: 	my $extrawidth = 2;
                    153: 	my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
                    154: 	foreach my $area (@areas) {
1.43      albertel  155: 	    if ($area=~/^rectangle:/) {
1.49      albertel  156: 		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
                    157: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
1.43      albertel  158: 		my ($x1,$y1,$x2,$y2)=
                    159: 		    ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.49      albertel  160: 		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
1.43      albertel  161: 					      ($width+$extrawidth)));
1.49      albertel  162: 		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
                    163: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    164: 		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
1.43      albertel  165: 	    } elsif ($area=~/^polygon:(.*)/) {
1.49      albertel  166: 		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
                    167: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    168: 		$x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
                    169: 		$x{"cgi.$id.OBJEXTRA$i"}=$1;
                    170: 		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
                    171: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    172: 		$x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
                    173: 		$x{"cgi.$id.OBJEXTRA$i"}=$1;
1.43      albertel  174: 	    }
1.42      albertel  175: 	}
                    176:     }
1.41      albertel  177:     &Apache::lonnet::appenv(%x);
                    178:     return $id;
1.40      albertel  179: }
                    180: 
1.2       albertel  181: sub displayfoils {
1.36      albertel  182:     my ($target,@whichopt) = @_;
                    183:     my $result ='';
                    184:     my $name;
                    185:     my $temp=1;
                    186:     foreach $name (@whichopt) {
                    187: 	$result.=$Apache::response::foilgroup{"$name.text"};
                    188: 	&Apache::lonxml::debug("Text is $result");
                    189: 	if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
                    190: 	my $image=$Apache::response::foilgroup{"$name.image"};
                    191: 	&Apache::lonxml::debug("image is $image");
1.40      albertel  192: 	if ( $target eq 'web' && $image !~ /^http:/ ) {
1.47      albertel  193: 	    $image=&clean_up_image($image);
                    194: 	} 
1.40      albertel  195: 	&Apache::lonxml::debug("image is $image");
1.36      albertel  196: 	if ( &Apache::response::show_answer() ) {
                    197: 	    if ($target eq 'tex') {
                    198: 		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
                    199: 	    } else {
1.42      albertel  200: 		my $token=&prep_image($image,'answer',$name);
1.40      albertel  201: 		$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36      albertel  202: 	    }
                    203: 	} else {
                    204: 	    if ($target eq 'tex') {
                    205: 		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
                    206: 	    } else {
1.40      albertel  207: 		my $id=$Apache::inputtags::response['-1'];
                    208: 		my $token=&prep_image($image);
                    209: 		my $temp=1;
                    210: 		$result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
                    211: 		    "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36      albertel  212: 	    }
                    213: 	}
                    214: 	$temp++;
                    215:     }
                    216:     return $result;
1.47      albertel  217: }
                    218: 
                    219: sub clean_up_image {
                    220:     my ($image)=@_;
                    221:     if ($image =~ /\s*<img\s*/) {
1.50      albertel  222: 	($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
1.47      albertel  223: 	if ($image !~ /^http:/) {
                    224: 	    $image=&Apache::lonnet::hreflocation('',$image);
                    225: 	}
                    226: 	if (!$image) {
                    227: 	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                    228: 	}
                    229:     } else {
                    230: 	$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
1.66      foxr      231: 	&Apache::lonxml::debug("repcopying: $image");
1.64      raeburn   232: 	if (&Apache::lonnet::repcopy($image) ne 'ok') {
1.47      albertel  233: 	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                    234: 	}
                    235:     }
                    236:     return $image;
1.2       albertel  237: }
                    238: 
1.3       albertel  239: sub gradefoils {
1.36      albertel  240:     my (@whichopt) = @_;
                    241:     my $x;
                    242:     my $y;
                    243:     my $result;
                    244:     my $id=$Apache::inputtags::response['-1'];
                    245:     my $temp=1;
                    246:     foreach my $name (@whichopt) {
1.65      albertel  247: 	$x=$env{"form.HWVAL_$id:$temp.x"};
                    248: 	$y=$env{"form.HWVAL_$id:$temp.y"};
1.36      albertel  249: 	&Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
                    250: 	if (defined($x) && defined($y) &&
                    251: 	    defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
                    252: 	    my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
                    253: 	    my $grade="INCORRECT";
                    254: 	    foreach my $area (@areas) {
                    255: 		&Apache::lonxml::debug("Area is $area for $name");
                    256: 		$area =~ m/([a-z]*):/;
                    257: 		&Apache::lonxml::debug("Area of type $1");
                    258: 		if ($1 eq 'rectangle') {
                    259: 		    $grade=&grade_rectangle($area,$x,$y);
1.43      albertel  260: 		} elsif ($1 eq 'polygon') {
                    261: 		    $grade=&grade_polygon($area,$x,$y);
1.36      albertel  262: 		} else {
                    263: 		    &Apache::lonxml::error("Unknown area style $area");
                    264: 		}
                    265: 		&Apache::lonxml::debug("Area said $grade");
                    266: 		if ($grade eq 'APPROX_ANS') { last; }
                    267: 	    }
                    268: 	    &Apache::lonxml::debug("Foil was $grade");
                    269: 	    if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
                    270: 	    if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
                    271: 	    &Apache::lonxml::debug("Question is $result");
                    272: 	    $temp++;
1.9       albertel  273: 	}
1.36      albertel  274:     }
1.60      albertel  275:     my $responsestr="$x:$y";
                    276:     my $part=$Apache::inputtags::part;
                    277:     my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
1.56      albertel  278:     if ($result 
                    279: 	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
1.60      albertel  280:     &Apache::response::handle_previous(\%previous,$result);
                    281:     $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
                    282:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
1.36      albertel  283:     return '';
1.3       albertel  284: }
                    285: 
1.1       albertel  286: sub end_foilgroup {
1.36      albertel  287:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    288:     my $result='';
                    289:     my @whichopt;
1.38      albertel  290:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    291: 	$target eq 'analyze') {
1.36      albertel  292: 	my ($count,$max) = &getfoilcounts($parstack,$safeeval);
                    293: 	if ($count>$max) { $count=$max }
                    294: 	&Apache::lonxml::debug("Count is $count from $max");
                    295: 	@whichopt = &whichfoils($max);
                    296: 	if ($target eq 'web' || $target eq 'tex') {
                    297: 	    $result=&displayfoils($target,@whichopt);
                    298: 	} elsif ($target eq 'grade') {
1.65      albertel  299: 	    if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
1.37      albertel  300: 	} elsif ( $target eq 'analyze') {
                    301: 	    &Apache::response::analyze_store_foilgroup(\@whichopt,
                    302: 						      ['text','image','area']);
                    303: 	}
1.36      albertel  304:     } elsif ($target eq 'edit') {
                    305: 	$result=&Apache::edit::end_table();
                    306:     }
1.53      albertel  307:     &Apache::response::poprandomnumber();
1.36      albertel  308:     return $result;
1.1       albertel  309: }
                    310: 
                    311: sub start_conceptgroup {
1.36      albertel  312:     $Apache::imageresponse::conceptgroup=1;
                    313:     %Apache::response::conceptgroup=();
                    314:     return '';
1.1       albertel  315: }
                    316: 
                    317: sub end_conceptgroup {
1.36      albertel  318:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    319:     $Apache::imageresponse::conceptgroup=0;
                    320:     my $result;
1.37      albertel  321:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    322: 	$target eq 'analyze') {
                    323: 	&Apache::response::pick_foil_for_concept($target,
                    324: 						 ['area','text','image'],
                    325: 						 \%Apache::hint::image,
                    326: 						 $parstack,$safeeval);
1.36      albertel  327:     } elsif ($target eq 'edit') {
                    328: 	$result=&Apache::edit::end_table();
                    329:     }
                    330:     return $result;
1.31      albertel  331: }
                    332: 
                    333: sub insert_foil {
                    334:     return '
                    335:        <foil>
                    336:            <image></image>
                    337:            <text></text>
                    338:            <rectangle></rectangle>
                    339:        </foil>
                    340: ';
1.1       albertel  341: }
                    342: 
1.12      albertel  343: $Apache::imageresponse::curname='';
1.1       albertel  344: sub start_foil {
1.36      albertel  345:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.67      albertel  346:     my $result;
1.37      albertel  347:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    348: 	$target eq 'analyze') {
1.36      albertel  349: 	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.59      albertel  350: 	if (!$name) {
                    351: 	    &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
                    352: 	    $name=$Apache::lonxml::curdepth;
                    353: 	}
1.51      albertel  354: 	if (defined($Apache::response::foilnames{$name})) {
                    355: 	    &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
                    356: 	}
1.52      albertel  357: 	$Apache::response::foilnames{$name}++;
1.36      albertel  358: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  359: 	     #&& !&Apache::response::showallfoils()
                    360: 	     ) {
1.36      albertel  361: 	    push(@{ $Apache::response::conceptgroup{'names'} }, $name);
                    362: 	} else {
                    363: 	    push(@{ $Apache::response::foilgroup{'names'} }, $name);
                    364: 	}
                    365: 	$Apache::imageresponse::curname=$name;
1.67      albertel  366:     } elsif ($target eq 'edit') {
                    367: 	$result  = &Apache::edit::tag_start($target,$token);
                    368: 	$result .= &Apache::edit::text_arg('Name:','name',$token);
                    369: 	$result .= &Apache::edit::end_row().
                    370: 	    &Apache::edit::start_spanning_row();
                    371:     } elsif ($target eq 'modified') {
                    372: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    373: 						     $safeeval,'name');
                    374: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    375:     } 
                    376:     return $result;;
1.1       albertel  377: }
                    378: 
                    379: sub end_foil {
1.26      albertel  380:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    381:     my $result;
                    382:     if ($target eq 'edit') {
                    383: 	$result=&Apache::edit::end_table();
                    384:     }
                    385:     return $result;
1.1       albertel  386: }
                    387: 
                    388: sub start_text {
1.36      albertel  389:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    390:     my $result='';
1.37      albertel  391:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.36      albertel  392: 	&Apache::lonxml::startredirection; 
                    393:     } elsif ($target eq 'edit') {
                    394: 	my $descr=&Apache::lonxml::get_all_text('/text',$parser);
                    395: 	$result=&Apache::edit::tag_start($target,$token,'Task Description').
                    396: 	    &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
                    397: 	    &Apache::edit::end_row();
                    398:     } elsif ($target eq "modified") {
1.39      albertel  399: 	$result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
1.36      albertel  400:     }
                    401:     return $result;
1.1       albertel  402: }
                    403: 
                    404: sub end_text {
1.36      albertel  405:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    406:     my $result;
1.37      albertel  407:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.36      albertel  408: 	my $name = $Apache::imageresponse::curname;
                    409: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  410: 	     #&& !&Apache::response::showallfoils()
                    411: 	     ) {
1.36      albertel  412: 	    $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
                    413: 	} else {
                    414: 	    $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
                    415: 	}
                    416:     } elsif ($target eq 'edit') {
                    417: 	$result=&Apache::edit::end_table();
                    418:     }
                    419:     return $result;
1.1       albertel  420: }
                    421: 
                    422: sub start_image {
1.36      albertel  423:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    424:     my $result='';
1.37      albertel  425:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.36      albertel  426: 	&Apache::lonxml::startredirection; 
                    427:     } elsif ($target eq 'edit') {
                    428: 	my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
                    429: 	$Apache::edit::bgimgsrc=$bgimg;
                    430: 	$Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
                    431: 
                    432: 	$result=&Apache::edit::tag_start($target,$token,'Clickable Image').
                    433: 	    &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
                    434: 	$result.=&Apache::edit::browse(undef,'textnode').' ';
                    435: 	$result.=&Apache::edit::search(undef,'textnode').
                    436: 	    &Apache::edit::end_row();
                    437:     } elsif ($target eq "modified") {
1.39      albertel  438: 	$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
1.36      albertel  439:     }
                    440:     return $result;
1.1       albertel  441: }
                    442: 
                    443: sub end_image {
1.36      albertel  444:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    445:     my $result;
                    446:     my $name = $Apache::imageresponse::curname;
                    447:     if ($target eq 'web') {
1.62      albertel  448: 	my $image = &Apache::lonxml::endredirection();
1.36      albertel  449: 	&Apache::lonxml::debug("original image is $image");
1.37      albertel  450: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  451: 	     #&& !&Apache::response::showallfoils()
                    452: 	     ) {
1.37      albertel  453: 	    $Apache::response::conceptgroup{"$name.image"} = $image;
                    454: 	} else {
                    455: 	    $Apache::response::foilgroup{"$name.image"} = $image;
                    456: 	}
                    457:     } elsif ($target eq 'analyze') {
1.62      albertel  458: 	my $image = &Apache::lonxml::endredirection();
1.36      albertel  459: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  460: 	     #&& !&Apache::response::showallfoils()
                    461: 	     ) {
1.36      albertel  462: 	    $Apache::response::conceptgroup{"$name.image"} = $image;
                    463: 	} else {
                    464: 	    $Apache::response::foilgroup{"$name.image"} = $image;
                    465: 	}
                    466:     } elsif ($target eq 'edit') {
                    467: 	$result=&Apache::edit::end_table();
                    468:     } elsif ($target eq 'tex') {
1.62      albertel  469: 	my $src = &Apache::lonxml::endredirection();
1.68      foxr      470: 
                    471: 	#  There may be all sorts of whitespace on fore and aft:
                    472: 
1.69    ! foxr      473: 	$src =~ s/\s+$//s;
        !           474: 	$src =~ s/^\s+//s;
1.68      foxr      475: 
                    476: 	#
                    477: 	#  Gnuplot e.g. just generates the latex to put inplace.
                    478: 	#
                    479: 	my $graphinclude;
                    480: 	if ($src =~ /^\\graphicspath/) {
                    481: 	    $graphinclude = $src;
                    482: 	} else {
                    483: 	    my ($path,$file) = &Apache::londefdef::get_eps_image($src);
                    484: 	    my ($height_param,$width_param)=
                    485: 		&Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
                    486: 	    $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
                    487: 	}
                    488: 	$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
1.36      albertel  489:     } 
                    490:     return $result;
1.1       albertel  491: }
                    492: 
                    493: sub start_rectangle {
1.36      albertel  494:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    495:     my $result='';
1.38      albertel  496:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    497: 	$target eq 'analyze') { 
1.36      albertel  498: 	&Apache::lonxml::startredirection; 
                    499:     } elsif ($target eq 'edit') {
                    500: 	my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
                    501: 	$result=&Apache::edit::tag_start($target,$token,'Rectangle').
                    502: 	    &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
1.44      albertel  503: 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
1.36      albertel  504: 	    &Apache::edit::end_row();
                    505:     } elsif ($target eq "modified") {
1.44      albertel  506: 	&Apache::edit::deletecoorddata();
1.39      albertel  507: 	$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
1.36      albertel  508:     }
                    509:     return $result;
1.1       albertel  510: }
                    511: 
1.3       albertel  512: sub grade_rectangle {
1.36      albertel  513:     my ($spec,$x,$y) = @_;
                    514:     &Apache::lonxml::debug("Spec is $spec");
1.43      albertel  515:     my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.36      albertel  516:     &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
                    517:     if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
                    518:     if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
                    519:     if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
                    520: 	return 'APPROX_ANS';
                    521:     }
                    522:     return 'INCORRECT';
1.3       albertel  523: }
                    524: 
1.1       albertel  525: sub end_rectangle {
1.36      albertel  526:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    527:     my $result;
1.38      albertel  528:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    529: 	$target eq 'analyze') {
1.36      albertel  530: 	my $name = $Apache::imageresponse::curname;
                    531: 	my $area = &Apache::lonxml::endredirection;
1.54      albertel  532: 	$area=~s/\s//g;
1.36      albertel  533: 	&Apache::lonxml::debug("out is $area for $name");
                    534: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  535: 	     #&& !&Apache::response::showallfoils()
                    536: 	     ) {
1.36      albertel  537: 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
                    538: 	} else {
                    539: 	    push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
1.43      albertel  540: 	}
                    541:     } elsif ($target eq 'edit') {
                    542: 	$result=&Apache::edit::end_table();
                    543:     }
                    544:     return $result;
                    545: }
                    546: 
                    547: sub start_polygon {
                    548:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    549:     my $result='';
                    550:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    551: 	$target eq 'analyze') { 
                    552: 	&Apache::lonxml::startredirection; 
                    553:     } elsif ($target eq 'edit') {
                    554: 	my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
                    555: 	$result=&Apache::edit::tag_start($target,$token,'Polygon').
                    556: 	    &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
1.44      albertel  557: 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
1.43      albertel  558: 	    &Apache::edit::end_row();
                    559:     } elsif ($target eq "modified") {
                    560: 	$result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
                    561:     }
                    562:     return $result;
                    563: }
                    564: 
                    565: sub grade_polygon {
                    566:     my ($spec,$x,$y) = @_;
                    567:     &Apache::lonxml::debug("Spec is $spec");
                    568:     $spec=~s/^polygon://;
                    569:     my @polygon;
                    570:     foreach my $coord (split('-',$spec)) {
                    571: 	my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
                    572: 	&Apache::lonxml::debug("x $x y $y");
                    573: 	push @polygon, {'x'=>$x,'y'=>$y};
                    574:     }
                    575:     #make end point start point
                    576:     push @polygon, $polygon[0];
                    577:     # cribbed from
                    578:     # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
                    579:     my $crossing = 0;    # the crossing number counter
                    580: 
                    581:     # loop through all edges of the polygon
                    582:     for (my $i=0; $i<$#polygon; $i++) {    # edge from V[i] to V[i+1]
                    583: 	if ((($polygon[$i]->{'y'} <= $y)
                    584: 	     && ($polygon[$i+1]->{'y'} > $y))    # an upward crossing
                    585: 	    || 
                    586: 	    (($polygon[$i]->{'y'} > $y) 
                    587: 	     && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
                    588: 	    # compute the actual edge-ray intersect x-coordinate
                    589:             my $vt = ($y - $polygon[$i]->{'y'}) 
                    590: 		/ ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
                    591:             if ($x < $polygon[$i]->{'x'} + $vt * 
                    592: 		($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
                    593:                 $crossing++;   # a valid crossing of y=P.y right of P.x
                    594: 	    }
                    595: 	}
                    596:     }
                    597: 
                    598:     # 0 if even (out), and 1 if odd (in)
                    599:     if ($crossing%2) {
                    600: 	return 'APPROX_ANS';
                    601:     } else {
                    602: 	return 'INCORRECT';
                    603:     }
                    604: }
                    605: 
                    606: sub end_polygon {
                    607:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    608:     my $result;
                    609:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    610: 	$target eq 'analyze') {
                    611: 	my $name = $Apache::imageresponse::curname;
                    612: 	my $area = &Apache::lonxml::endredirection;
1.48      albertel  613: 	$area=~s/\s*//g;
1.43      albertel  614: 	&Apache::lonxml::debug("out is $area for $name");
                    615: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  616: 	     #&& !&Apache::response::showallfoils()
                    617: 	     ) {
1.43      albertel  618: 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
                    619: 	} else {
                    620: 	    push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
1.36      albertel  621: 	}
                    622:     } elsif ($target eq 'edit') {
                    623: 	$result=&Apache::edit::end_table();
                    624:     }
                    625:     return $result;
1.1       albertel  626: }
                    627: 1;
                    628: __END__
                    629:  

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