1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.95 2008/11/12 20:01:21 jms Exp $
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: #
29: #FIXME LATER assumes multiple possible submissions but only one is possible
30: #currently
31:
32:
33: =head1 NAME
34:
35: Apache::imageresponse
36:
37: =head1 SYNOPSIS
38:
39: Coordinates the response to clicking an image.
40:
41: This is part of the LearningOnline Network with CAPA project
42: described at http://www.lon-capa.org.
43:
44: =head1 HANDLER SUBROUTINE
45:
46:
47:
48: =head1 OTHER SUBROUTINES
49:
50: =over
51:
52: =item *
53:
54: start_imageresponse()
55:
56: =item *
57:
58: end_imageresponse()
59:
60: =item *
61:
62: start_foilgroup()
63:
64: =item *
65:
66: getfoilcounts()
67:
68: =item *
69:
70: whichfoils()
71:
72: =item *
73:
74: prep_image()
75:
76: =item *
77:
78: draw_image()
79:
80: =item *
81:
82: displayfoils()
83:
84: =item *
85:
86: format_prior_response()
87:
88: =item *
89:
90: display_answers()
91:
92: =item *
93:
94: clean_up_image()
95:
96: =item *
97:
98: gradefoils()
99:
100: =item *
101:
102: stringify_submission()
103:
104: =item *
105:
106: get_submission()
107:
108: =item *
109:
110: end_foilgroup()
111:
112: =item *
113:
114: start_conceptgroup()
115:
116: =item *
117:
118: end_conceptgroup()
119:
120: =item *
121:
122: insert_foil()
123:
124: =item *
125:
126: start_foil()
127:
128: =item *
129:
130: end_foil()
131:
132: =item *
133:
134: start_text()
135:
136: =item *
137:
138: end_text()
139:
140: =item *
141:
142: start_image()
143:
144:
145: =item *
146:
147: end_image()
148:
149: =item *
150:
151: start_rectangle()
152:
153: =item *
154:
155: grade_rectangle()
156:
157: =item *
158:
159: end_rectangle()
160:
161: =item *
162:
163: start_polygon()
164:
165: =item *
166:
167: grade_polygon()
168:
169: =item *
170:
171: end_polygon()
172:
173: =back
174:
175: =cut
176:
177:
178: package Apache::imageresponse;
179: use strict;
180: use Image::Magick();
181: use Apache::randomlylabel();
182: use Apache::londefdef();
183: use Apache::Constants qw(:common :http);
184: use Apache::lonlocal;
185: use Apache::lonnet;
186: use lib '/home/httpd/lib/perl/';
187: use LONCAPA;
188:
189:
190: BEGIN {
191: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
192: }
193:
194: sub start_imageresponse {
195: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
196: my $result;
197: #when in a radiobutton response use these
198: &Apache::lonxml::register('Apache::imageresponse',
199: ('foilgroup','foil','text','image','rectangle',
200: 'polygon','conceptgroup'));
201: push (@Apache::lonxml::namespace,'imageresponse');
202: my $id = &Apache::response::start_response($parstack,$safeeval);
203: undef(%Apache::response::foilnames);
204: if ($target eq 'meta') {
205: $result=&Apache::response::meta_package_write('imageresponse');
206: } elsif ($target eq 'analyze') {
207: my $part_id="$Apache::inputtags::part.$id";
208: $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
209: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
210: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
211: 1);
212: } elsif ( $target eq 'edit' ) {
213: $result .= &Apache::edit::tag_start($target,$token).
214: &Apache::edit::text_arg('Max Number Of Shown Foils:',
215: 'max',$token,'4').
216: &Apache::edit::end_row().
217: &Apache::edit::start_spanning_row();
218: } elsif ( $target eq 'modified' ) {
219: my $constructtag=
220: &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
221: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
222: }
223: return $result;
224: }
225:
226: sub end_imageresponse {
227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
228:
229: my $part_id = $Apache::inputtags::part;
230: my $response_id = $Apache::inputtags::response[-1];
231:
232: pop(@Apache::lonxml::namespace);
233: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
234:
235: my $result;
236: if ($target eq 'edit') {
237: $result=&Apache::edit::end_table();
238: } elsif ($target eq 'tex'
239: && $Apache::lonhomework::type eq 'exam') {
240: $result=&Apache::inputtags::exam_score_line($target);
241: }
242:
243: undef(%Apache::response::foilnames);
244:
245: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
246: $target eq 'tex' || $target eq 'analyze') {
247: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
248: "$part_id.$response_id");
249: if ($target eq 'analyze') {
250: &Apache::lonhomework::set_bubble_lines();
251: }
252:
253: }
254: &Apache::response::end_response();
255:
256: return $result;
257: }
258:
259: %Apache::response::foilgroup=();
260: sub start_foilgroup {
261: %Apache::response::foilgroup=();
262: $Apache::imageresponse::conceptgroup=0;
263: &Apache::response::pushrandomnumber();
264: return '';
265: }
266:
267: sub getfoilcounts {
268: my ($parstack,$safeeval)=@_;
269:
270: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
271: # +1 since instructors will count from 1
272: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
273: if (&Apache::response::showallfoils()) { $max=$count; }
274: return ($count,$max);
275: }
276:
277: sub whichfoils {
278: my ($max)=@_;
279: return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
280: my @names = @{ $Apache::response::foilgroup{'names'} };
281: my @whichopt;
282: while ((($#whichopt+1) < $max) && ($#names > -1)) {
283: &Apache::lonxml::debug("Have $#whichopt max is $max");
284: my $aopt;
285: if (&Apache::response::showallfoils()) {
286: $aopt=0;
287: } else {
288: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
289: }
290: &Apache::lonxml::debug("From $#names elms, picking $aopt");
291: $aopt=splice(@names,$aopt,1);
292: &Apache::lonxml::debug("Picked $aopt");
293: push(@whichopt,$aopt);
294: }
295: return @whichopt;
296: }
297:
298: sub prep_image {
299: my ($image,$mode,$name)=@_;
300:
301: my ($x,$y)= &get_submission($name);
302: &Apache::lonxml::debug("for $name drawing click at $x and $y");
303: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
304: }
305:
306: sub draw_image {
307: my ($mode,$image,$x,$y,$areas) = @_;
308:
309: my $id=&Apache::loncommon::get_cgi_id();
310:
311: my (%x,$i);
312: $x{"cgi.$id.BGIMG"}=&escape($image);
313:
314: #draws 2 xs on the image at the clicked location
315: #one in white and then one in red on top of the one in white
316:
317: if (defined($x) && $x =~/\S/
318: && defined($y) && $y =~/\S/
319: && ($mode eq 'submission' || !&Apache::response::show_answer())
320: && $mode ne 'answeronly') {
321: my $length = 6;
322: my $width = 1;
323: my $extrawidth = 2;
324: my $xmin=($x-$length);
325: my $xmax=($x+$length);
326: my $ymin=($y-$length);
327: my $ymax=($y+$length);
328:
329: $x{"cgi.$id.OBJTYPE"}.='LINE:';
330: $i=$x{"cgi.$id.OBJCOUNT"}++;
331: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
332: "FFFFFF",($width+$extrawidth)));
333: $x{"cgi.$id.OBJTYPE"}.='LINE:';
334: $i=$x{"cgi.$id.OBJCOUNT"}++;
335: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
336: "FFFFFF",($width+$extrawidth)));
337: $x{"cgi.$id.OBJTYPE"}.='LINE:';
338: $i=$x{"cgi.$id.OBJCOUNT"}++;
339: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
340: "FF0000",($width)));
341: $x{"cgi.$id.OBJTYPE"}.='LINE:';
342: $i=$x{"cgi.$id.OBJCOUNT"}++;
343: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
344: "FF0000",($width)));
345: }
346: if ($mode eq 'answer' || $mode eq 'answeronly') {
347: my $width = 1;
348: my $extrawidth = 2;
349: foreach my $area (@{ $areas }) {
350: if ($area=~/^rectangle:/) {
351: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
352: $i=$x{"cgi.$id.OBJCOUNT"}++;
353: my ($x1,$y1,$x2,$y2)=
354: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
355: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
356: ($width+$extrawidth)));
357: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
358: $i=$x{"cgi.$id.OBJCOUNT"}++;
359: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
360: } elsif ($area=~/^polygon:(.*)/) {
361: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
362: $i=$x{"cgi.$id.OBJCOUNT"}++;
363: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
364: $x{"cgi.$id.OBJEXTRA$i"}=$1;
365: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
366: $i=$x{"cgi.$id.OBJCOUNT"}++;
367: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
368: $x{"cgi.$id.OBJEXTRA$i"}=$1;
369: }
370: }
371: }
372: &Apache::lonnet::appenv(\%x);
373: return $id;
374: }
375:
376: sub displayfoils {
377: my ($target,@whichopt) = @_;
378: my $result ='';
379: my $temp=1;
380: my @images;
381: foreach my $name (@whichopt) {
382: $result.=$Apache::response::foilgroup{"$name.text"};
383: &Apache::lonxml::debug("Text is $result");
384: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
385: my $image=$Apache::response::foilgroup{"$name.image"};
386: &Apache::lonxml::debug("image is $image");
387: if ( ($target eq 'web' || $target eq 'answer')
388: && $image !~ /^http:/ ) {
389: $image=&clean_up_image($image);
390: }
391: push(@images,$image);
392: &Apache::lonxml::debug("image is $image");
393: if ( &Apache::response::show_answer() ) {
394: if ($target eq 'tex') {
395: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
396: } else {
397: my $token=&prep_image($image,'answer',$name);
398: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
399: }
400: } else {
401: if ($target eq 'tex') {
402: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
403: } else {
404: my $respid=$Apache::inputtags::response['-1'];
405: my $token=&prep_image($image,'submission',$name);
406: my $input_id = "HWVAL_$respid:$temp";
407: my $id = $env{'form.request.prefix'}.$input_id;
408: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
409: src="/adm/randomlabel.png?token='.$token.'"
410: id="'.$id.'_imageresponse"
411: />'.
412: '<br />'.
413: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
414: '<input type="hidden" name="'.$input_id.'" value="'.
415: join(':',&get_submission($name)).'" />';
416: }
417: }
418: $temp++;
419: }
420: if ($target eq 'web') {
421: &Apache::response::setup_prior_tries_hash(\&format_prior_response,
422: [\@images,\@whichopt]);
423: }
424: return $result;
425: }
426:
427: sub format_prior_response {
428: my ($mode,$answer,$other_data) = @_;
429:
430: my $result;
431:
432: # make a copy of the data in the refs
433: my @images = @{ $other_data->[0] };
434: my @foils = @{ $other_data->[1] };
435: foreach my $name (@foils) {
436: my $image = pop(@images);
437: my ($x,$y) = &get_submission($name,$answer);
438: my $token = &draw_image('submission',$image,$x,$y);
439: $result .=
440: '<img class="LC_prior_image"
441: src="/adm/randomlabel.png?token='.$token.'" /><br />';
442: }
443: return $result;
444: }
445:
446: sub display_answers {
447: my ($target,$whichopt)=@_;
448:
449: my $result=&Apache::response::answer_header('imageresponse');
450: foreach my $name (@$whichopt) {
451: my $image=$Apache::response::foilgroup{"$name.image"};
452: &Apache::lonxml::debug("image is $image");
453: if ( ($target eq 'web' || $target eq 'answer')
454: && $image !~ /^http:/ ) {
455: $image = &clean_up_image($image);
456: }
457: my $token=&prep_image($image,'answeronly',$name);
458:
459: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
460: }
461: $result.=&Apache::response::answer_footer('imageresponse');
462: return $result;
463: }
464:
465: sub clean_up_image {
466: my ($image)=@_;
467: if ($image =~ /\s*<img\s*/) {
468: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
469: if ($image !~ /^http:/) {
470: $image=&Apache::lonnet::hreflocation('',$image);
471: }
472: if (!$image) {
473: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
474: }
475: } else {
476: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
477: &Apache::lonxml::debug("repcopying: $image");
478: if (&Apache::lonnet::repcopy($image) ne 'ok') {
479: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
480: }
481: }
482: return $image;
483: }
484:
485: sub gradefoils {
486: my (@whichopt) = @_;
487:
488: my $partid = $Apache::inputtags::part;
489: my $id = $Apache::inputtags::response['-1'];
490:
491: if ($Apache::lonhomework::type eq 'exam') {
492: &Apache::response::scored_response($partid,$id);
493: return;
494: }
495:
496: my @results;
497: my $temp=1;
498: my %response;
499: foreach my $name (@whichopt) {
500: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
501: $response{$name} = $env{"form.HWVAL_$id:$temp"};
502: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
503: if (defined($x) && defined($y) &&
504: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
505: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
506: my $grade="INCORRECT";
507: foreach my $area (@areas) {
508: &Apache::lonxml::debug("Area is $area for $name");
509: $area =~ m/([a-z]*):/;
510: &Apache::lonxml::debug("Area of type $1");
511: if ($1 eq 'rectangle') {
512: $grade=&grade_rectangle($area,$x,$y);
513: } elsif ($1 eq 'polygon') {
514: $grade=&grade_polygon($area,$x,$y);
515: } else {
516: &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
517: }
518: &Apache::lonxml::debug("Area said $grade");
519: if ($grade eq 'APPROX_ANS') { last; }
520: }
521: &Apache::lonxml::debug("Foil was $grade");
522: push(@results, $grade)
523: } else {
524: push(@results, 'MISSING_ANSWER')
525: }
526: $temp++;
527: }
528: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
529: &Apache::lonxml::debug("Question is $result");
530:
531: my $part=$Apache::inputtags::part;
532: my %previous=
533: &Apache::response::check_for_previous(&stringify_submission(\%response),
534: $part,$id);
535: if ($result
536: && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
537: &Apache::response::handle_previous(\%previous,$result);
538: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
539: &stringify_submission(\%response);
540: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
541: return;
542: }
543:
544: sub stringify_submission {
545: my ($response) = @_;
546: return &Apache::lonnet::hash2str(%{ $response });
547:
548:
549: }
550:
551: sub get_submission {
552: my ($name,$string) = @_;
553:
554: if (!defined($string)) {
555: my $part=$Apache::inputtags::part;
556: my $respid=$Apache::inputtags::response['-1'];
557: $string =
558: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
559: }
560:
561: if ($string !~ /=/) {
562: return split(':',$string);
563: } else {
564: my %response = &Apache::lonnet::str2hash($string);
565: return split(':',$response{$name});
566: }
567: }
568:
569: sub end_foilgroup {
570: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
571: my $result='';
572: my @whichopt;
573:
574: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
575: $target eq 'analyze' || $target eq 'answer') {
576:
577: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
578: if ($count>$max) { $count=$max }
579: &Apache::lonxml::debug("Count is $count from $max");
580:
581: @whichopt = &whichfoils($max);
582:
583: if ($target eq 'web' || $target eq 'tex') {
584: $result=&displayfoils($target,@whichopt);
585: $Apache::lonxml::post_evaluate=0;
586: } elsif ($target eq 'grade') {
587: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
588: } elsif ( $target eq 'analyze') {
589: &Apache::response::analyze_store_foilgroup(\@whichopt,
590: ['text','image','area']);
591: } elsif ($target eq 'answer'
592: && $env{'form.answer_output_mode'} ne 'tex') {
593: $result=&display_answers($target,\@whichopt);
594: }
595:
596: } elsif ($target eq 'edit') {
597: $result=&Apache::edit::end_table();
598: }
599: &Apache::response::poprandomnumber();
600: return $result;
601: }
602:
603: sub start_conceptgroup {
604: $Apache::imageresponse::conceptgroup=1;
605: %Apache::response::conceptgroup=();
606: return '';
607: }
608:
609: sub end_conceptgroup {
610: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
611: $Apache::imageresponse::conceptgroup=0;
612: my $result;
613: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
614: $target eq 'analyze') {
615: &Apache::response::pick_foil_for_concept($target,
616: ['area','text','image'],
617: \%Apache::hint::image,
618: $parstack,$safeeval);
619: } elsif ($target eq 'edit') {
620: $result=&Apache::edit::end_table();
621: }
622: return $result;
623: }
624:
625: sub insert_foil {
626: return '
627: <foil>
628: <image></image>
629: <text></text>
630: <rectangle></rectangle>
631: </foil>
632: ';
633: }
634:
635: $Apache::imageresponse::curname='';
636: sub start_foil {
637: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
638: my $result;
639: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
640: $target eq 'analyze' || $target eq 'answer') {
641: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
642: if ($name eq "") {
643: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
644: $name=$Apache::lonxml::curdepth;
645: }
646: if (defined($Apache::response::foilnames{$name})) {
647: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
648: ,'<b><tt>'.$name.'</tt></b>'));
649: }
650: $Apache::response::foilnames{$name}++;
651: if ( $Apache::imageresponse::conceptgroup
652: && !&Apache::response::showallfoils()
653: ) {
654: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
655: } else {
656: push(@{ $Apache::response::foilgroup{'names'} }, $name);
657: }
658: $Apache::imageresponse::curname=$name;
659: } elsif ($target eq 'edit') {
660: $result = &Apache::edit::tag_start($target,$token);
661: $result .= &Apache::edit::text_arg('Name:','name',$token);
662: $result .= &Apache::edit::end_row().
663: &Apache::edit::start_spanning_row();
664: } elsif ($target eq 'modified') {
665: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
666: $safeeval,'name');
667: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
668: }
669: return $result;;
670: }
671:
672: sub end_foil {
673: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
674: my $result;
675: if ($target eq 'edit') {
676: $result=&Apache::edit::end_table();
677: }
678: return $result;
679: }
680:
681: sub start_text {
682: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
683: my $result='';
684: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
685: || $target eq 'answer') {
686: &Apache::lonxml::startredirection;
687: } elsif ($target eq 'edit') {
688: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
689: $result=&Apache::edit::tag_start($target,$token,'Task Description').
690: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
691: &Apache::edit::end_row();
692: } elsif ($target eq "modified") {
693: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
694: }
695: return $result;
696: }
697:
698: sub end_text {
699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
700: my $result;
701: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
702: || $target eq 'answer') {
703: my $name = $Apache::imageresponse::curname;
704: if ( $Apache::imageresponse::conceptgroup
705: && !&Apache::response::showallfoils()
706: ) {
707: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
708: } else {
709: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
710: }
711: } elsif ($target eq 'edit') {
712: $result=&Apache::edit::end_table();
713: }
714: return $result;
715: }
716:
717: sub start_image {
718: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
719: my $result='';
720: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
721: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
722: || $target eq 'answer') {
723: &Apache::lonxml::startredirection;
724: } elsif ($target eq 'edit') {
725: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
726: $Apache::edit::bgimgsrc=$bgimg;
727: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
728:
729: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
730: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
731: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
732: $result.=&Apache::edit::search(undef,'textnode').
733: &Apache::edit::end_row();
734: } elsif ($target eq "modified") {
735: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
736: }
737: return $result;
738: }
739:
740: sub end_image {
741: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
742: my $result;
743: my $name = $Apache::imageresponse::curname;
744: if ($target eq 'web' || $target eq 'answer') {
745: my $image = &Apache::lonxml::endredirection();
746: &Apache::lonxml::debug("original image is $image");
747: if ( $Apache::imageresponse::conceptgroup
748: && !&Apache::response::showallfoils()
749: ) {
750: $Apache::response::conceptgroup{"$name.image"} = $image;
751: } else {
752: $Apache::response::foilgroup{"$name.image"} = $image;
753: }
754: } elsif ($target eq 'analyze') {
755: my $image = &Apache::lonxml::endredirection();
756: if ( $Apache::imageresponse::conceptgroup
757: && !&Apache::response::showallfoils()
758: ) {
759: $Apache::response::conceptgroup{"$name.image"} = $image;
760: } else {
761: $Apache::response::foilgroup{"$name.image"} = $image;
762: }
763: } elsif ($target eq 'edit') {
764: $result=&Apache::edit::end_table();
765: } elsif ($target eq 'tex') {
766: my $src = &Apache::lonxml::endredirection();
767:
768: # There may be all sorts of whitespace on fore and aft:
769:
770: $src =~ s/\s+$//s;
771: $src =~ s/^\s+//s;
772:
773: #
774: # Gnuplot e.g. just generates the latex to put inplace.
775: #
776: my $graphinclude;
777: if ($src =~ /^%DYNAMICIMAGE/) {
778: # This is needed because the newline is not always passed -> tex.
779: # At present we don't care about the sizing info.
780:
781: my ($commentline, $restofstuff) = split(/\n/, $src);
782: $graphinclude = $src;
783: $graphinclude =~ s/^$commentline//;
784: } else {
785: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
786: my ($height_param,$width_param)=
787: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
788: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
789: }
790: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
791: }
792: return $result;
793: }
794:
795: sub start_rectangle {
796: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
797: my $result='';
798: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
799: $target eq 'analyze' || $target eq 'answer') {
800: &Apache::lonxml::startredirection;
801: } elsif ($target eq 'edit') {
802: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
803: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
804: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
805: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
806: &Apache::edit::end_row();
807: } elsif ($target eq "modified") {
808: &Apache::edit::deletecoorddata();
809: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
810: }
811: return $result;
812: }
813:
814: sub grade_rectangle {
815: my ($spec,$x,$y) = @_;
816: &Apache::lonxml::debug("Spec is $spec");
817: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
818: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
819: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
820: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
821: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
822: return 'APPROX_ANS';
823: }
824: return 'INCORRECT';
825: }
826:
827: sub end_rectangle {
828: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
829: my $result;
830: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
831: $target eq 'analyze' || $target eq 'answer') {
832: my $name = $Apache::imageresponse::curname;
833: my $area = &Apache::lonxml::endredirection;
834: $area=~s/\s//g;
835: &Apache::lonxml::debug("out is $area for $name");
836: if ( $Apache::imageresponse::conceptgroup
837: && !&Apache::response::showallfoils()
838: ) {
839: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
840: } else {
841: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
842: }
843: } elsif ($target eq 'edit') {
844: $result=&Apache::edit::end_table();
845: }
846: return $result;
847: }
848:
849: sub start_polygon {
850: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
851: my $result='';
852: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
853: $target eq 'analyze' || $target eq 'answer') {
854: &Apache::lonxml::startredirection;
855: } elsif ($target eq 'edit') {
856: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
857: $result=&Apache::edit::tag_start($target,$token,'Polygon').
858: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
859: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
860: &Apache::edit::end_row();
861: } elsif ($target eq "modified") {
862: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
863: }
864: return $result;
865: }
866:
867: sub grade_polygon {
868: my ($spec,$x,$y) = @_;
869: &Apache::lonxml::debug("Spec is $spec");
870: $spec=~s/^polygon://;
871: my @polygon;
872: foreach my $coord (split('-',$spec)) {
873: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
874: &Apache::lonxml::debug("x $x y $y");
875: push @polygon, {'x'=>$x,'y'=>$y};
876: }
877: #make end point start point
878: push @polygon, $polygon[0];
879: # cribbed from
880: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
881: my $crossing = 0; # the crossing number counter
882:
883: # loop through all edges of the polygon
884: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
885: if ((($polygon[$i]->{'y'} <= $y)
886: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
887: ||
888: (($polygon[$i]->{'y'} > $y)
889: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
890: # compute the actual edge-ray intersect x-coordinate
891: my $vt = ($y - $polygon[$i]->{'y'})
892: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
893: if ($x < $polygon[$i]->{'x'} + $vt *
894: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
895: $crossing++; # a valid crossing of y=P.y right of P.x
896: }
897: }
898: }
899:
900: # 0 if even (out), and 1 if odd (in)
901: if ($crossing%2) {
902: return 'APPROX_ANS';
903: } else {
904: return 'INCORRECT';
905: }
906: }
907:
908: sub end_polygon {
909: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
910: my $result;
911: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
912: $target eq 'analyze' || $target eq 'answer') {
913: my $name = $Apache::imageresponse::curname;
914: my $area = &Apache::lonxml::endredirection;
915: $area=~s/\s*//g;
916: &Apache::lonxml::debug("out is $area for $name");
917: if ( $Apache::imageresponse::conceptgroup
918: && !&Apache::response::showallfoils()
919: ) {
920: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
921: } else {
922: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
923: }
924: } elsif ($target eq 'edit') {
925: $result=&Apache::edit::end_table();
926: }
927: return $result;
928: }
929: 1;
930: __END__
931:
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