1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.99 2010/02/28 23:37:44 raeburn 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 SUBROUTINES
45:
46: =over
47:
48: =item start_imageresponse()
49:
50: =item end_imageresponse()
51:
52: =item start_foilgroup()
53:
54: =item getfoilcounts()
55:
56: =item whichfoils()
57:
58: =item prep_image()
59:
60: =item draw_image()
61:
62: =item displayfoils()
63:
64: =item format_prior_response()
65:
66: =item display_answers()
67:
68: =item clean_up_image()
69:
70: =item gradefoils()
71:
72: =item stringify_submission()
73:
74: =item get_submission()
75:
76: =item end_foilgroup()
77:
78: =item start_conceptgroup()
79:
80: =item end_conceptgroup()
81:
82: =item insert_foil()
83:
84: =item start_foil()
85:
86: =item end_foil()
87:
88: =item start_text()
89:
90: =item end_text()
91:
92: =item start_image()
93:
94: =item end_image()
95:
96: =item start_rectangle()
97:
98: =item grade_rectangle()
99:
100: =item end_rectangle()
101:
102: =item start_polygon()
103:
104: =item grade_polygon()
105:
106: =item end_polygon()
107:
108: =back
109:
110: =cut
111:
112:
113: package Apache::imageresponse;
114: use strict;
115: use Image::Magick();
116: use Apache::randomlylabel();
117: use Apache::londefdef();
118: use Apache::Constants qw(:common :http);
119: use Apache::lonlocal;
120: use Apache::lonnet;
121: use lib '/home/httpd/lib/perl/';
122: use LONCAPA;
123:
124:
125: BEGIN {
126: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
127: }
128:
129: sub start_imageresponse {
130: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
131: my $result;
132: #when in a radiobutton response use these
133: &Apache::lonxml::register('Apache::imageresponse',
134: ('foilgroup','foil','text','image','rectangle',
135: 'polygon','conceptgroup'));
136: push (@Apache::lonxml::namespace,'imageresponse');
137: my $id = &Apache::response::start_response($parstack,$safeeval);
138: undef(%Apache::response::foilnames);
139: if ($target eq 'meta') {
140: $result=&Apache::response::meta_package_write('imageresponse');
141: } elsif ($target eq 'analyze') {
142: my $part_id="$Apache::inputtags::part.$id";
143: $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
144: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
145: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
146: 1);
147: } elsif ( $target eq 'edit' ) {
148: $result .= &Apache::edit::tag_start($target,$token).
149: &Apache::edit::text_arg('Max Number Of Shown Foils:',
150: 'max',$token,'4').
151: &Apache::edit::end_row().
152: &Apache::edit::start_spanning_row();
153: } elsif ( $target eq 'modified' ) {
154: my $constructtag=
155: &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
156: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
157: }
158: return $result;
159: }
160:
161: sub end_imageresponse {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
163:
164: my $part_id = $Apache::inputtags::part;
165: my $response_id = $Apache::inputtags::response[-1];
166:
167: pop(@Apache::lonxml::namespace);
168: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
169:
170: my $result;
171: if ($target eq 'edit') {
172: $result=&Apache::edit::end_table();
173: } elsif ($target eq 'tex'
174: && $Apache::lonhomework::type eq 'exam') {
175: $result=&Apache::inputtags::exam_score_line($target);
176: }
177:
178: undef(%Apache::response::foilnames);
179:
180: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
181: $target eq 'tex' || $target eq 'analyze') {
182: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
183: "$part_id.$response_id");
184: if ($target eq 'analyze') {
185: &Apache::lonhomework::set_bubble_lines();
186: }
187:
188: }
189: &Apache::response::end_response();
190: return $result;
191: }
192:
193: %Apache::response::foilgroup=();
194: sub start_foilgroup {
195: %Apache::response::foilgroup=();
196: $Apache::imageresponse::conceptgroup=0;
197: &Apache::response::pushrandomnumber();
198: return '';
199: }
200:
201: sub getfoilcounts {
202: my ($parstack,$safeeval)=@_;
203:
204: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
205: # +1 since instructors will count from 1
206: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
207: if (&Apache::response::showallfoils()) { $max=$count; }
208: return ($count,$max);
209: }
210:
211: sub whichfoils {
212: my ($max)=@_;
213: return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
214: my @names = @{ $Apache::response::foilgroup{'names'} };
215: my @whichopt;
216: while ((($#whichopt+1) < $max) && ($#names > -1)) {
217: &Apache::lonxml::debug("Have $#whichopt max is $max");
218: my $aopt;
219: if (&Apache::response::showallfoils()) {
220: $aopt=0;
221: } else {
222: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
223: }
224: &Apache::lonxml::debug("From $#names elms, picking $aopt");
225: $aopt=splice(@names,$aopt,1);
226: &Apache::lonxml::debug("Picked $aopt");
227: push(@whichopt,$aopt);
228: }
229: return @whichopt;
230: }
231:
232: sub prep_image {
233: my ($image,$mode,$name)=@_;
234:
235: my ($x,$y)= &get_submission($name);
236: &Apache::lonxml::debug("for $name drawing click at $x and $y");
237: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
238: }
239:
240: sub draw_image {
241: my ($mode,$image,$x,$y,$areas) = @_;
242:
243: my $id=&Apache::loncommon::get_cgi_id();
244:
245: my (%x,$i);
246: $x{"cgi.$id.BGIMG"}=&escape($image);
247:
248: #draws 2 xs on the image at the clicked location
249: #one in white and then one in red on top of the one in white
250:
251: if (defined($x) && $x =~/\S/
252: && defined($y) && $y =~/\S/
253: && ($mode eq 'submission' || !&Apache::response::show_answer())
254: && $mode ne 'answeronly') {
255: my $length = 6;
256: my $width = 1;
257: my $extrawidth = 2;
258: my $xmin=($x-$length);
259: my $xmax=($x+$length);
260: my $ymin=($y-$length);
261: my $ymax=($y+$length);
262:
263: $x{"cgi.$id.OBJTYPE"}.='LINE:';
264: $i=$x{"cgi.$id.OBJCOUNT"}++;
265: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
266: "FFFFFF",($width+$extrawidth)));
267: $x{"cgi.$id.OBJTYPE"}.='LINE:';
268: $i=$x{"cgi.$id.OBJCOUNT"}++;
269: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
270: "FFFFFF",($width+$extrawidth)));
271: $x{"cgi.$id.OBJTYPE"}.='LINE:';
272: $i=$x{"cgi.$id.OBJCOUNT"}++;
273: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
274: "FF0000",($width)));
275: $x{"cgi.$id.OBJTYPE"}.='LINE:';
276: $i=$x{"cgi.$id.OBJCOUNT"}++;
277: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
278: "FF0000",($width)));
279: }
280: if ($mode eq 'answer' || $mode eq 'answeronly') {
281: my $width = 1;
282: my $extrawidth = 2;
283: foreach my $area (@{ $areas }) {
284: if ($area=~/^rectangle:/) {
285: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
286: $i=$x{"cgi.$id.OBJCOUNT"}++;
287: my ($x1,$y1,$x2,$y2)=
288: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
289: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
290: ($width+$extrawidth)));
291: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
292: $i=$x{"cgi.$id.OBJCOUNT"}++;
293: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
294: } elsif ($area=~/^polygon:(.*)/) {
295: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
296: $i=$x{"cgi.$id.OBJCOUNT"}++;
297: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
298: $x{"cgi.$id.OBJEXTRA$i"}=$1;
299: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
300: $i=$x{"cgi.$id.OBJCOUNT"}++;
301: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
302: $x{"cgi.$id.OBJEXTRA$i"}=$1;
303: }
304: }
305: }
306: &Apache::lonnet::appenv(\%x);
307: return $id;
308: }
309:
310: sub displayfoils {
311: my ($target,@whichopt) = @_;
312: my $result ='';
313: my $temp=1;
314: my @images;
315: foreach my $name (@whichopt) {
316: $result.=$Apache::response::foilgroup{"$name.text"};
317: &Apache::lonxml::debug("Text is $result");
318: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
319: my $image=$Apache::response::foilgroup{"$name.image"};
320: &Apache::lonxml::debug("image is $image");
321: if ( ($target eq 'web' || $target eq 'answer')
322: && $image !~ /^https?\:/ ) {
323: $image=&clean_up_image($image);
324: }
325: push(@images,$image);
326: &Apache::lonxml::debug("image is $image");
327: if ( &Apache::response::show_answer() ) {
328: if ($target eq 'tex') {
329: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
330: } else {
331: my $token=&prep_image($image,'answer',$name);
332: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
333: }
334: } else {
335: if ($target eq 'tex') {
336: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
337: } else {
338: my $respid=$Apache::inputtags::response['-1'];
339: my $token=&prep_image($image,'submission',$name);
340: my $input_id = "HWVAL_$respid:$temp";
341: my $id = $env{'form.request.prefix'}.$input_id;
342: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
343: src="/adm/randomlabel.png?token='.$token.'"
344: id="'.$id.'_imageresponse"
345: />'.
346: '<br />'.
347: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
348: '<input type="hidden" name="'.$input_id.'" value="'.
349: join(':',&get_submission($name)).'" />';
350: }
351: }
352: $temp++;
353: }
354: if ($target eq 'web') {
355: &Apache::response::setup_prior_tries_hash(\&format_prior_response,
356: [\@images,\@whichopt]);
357: }
358: return $result;
359: }
360:
361: sub format_prior_response {
362: my ($mode,$answer,$other_data) = @_;
363:
364: my $result;
365:
366: # make a copy of the data in the refs
367: my @images = @{ $other_data->[0] };
368: my @foils = @{ $other_data->[1] };
369: foreach my $name (@foils) {
370: my $image = pop(@images);
371: my ($x,$y) = &get_submission($name,$answer);
372: my $token = &draw_image('submission',$image,$x,$y);
373: $result .=
374: '<img class="LC_prior_image"
375: src="/adm/randomlabel.png?token='.$token.'" /><br />';
376: }
377: return $result;
378: }
379:
380: sub display_answers {
381: my ($target,$whichopt)=@_;
382:
383: my $result=&Apache::response::answer_header('imageresponse');
384: foreach my $name (@$whichopt) {
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 !~ /^https?\:/ ) {
389: $image = &clean_up_image($image);
390: }
391: my $token=&prep_image($image,'answeronly',$name);
392:
393: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
394: }
395: $result.=&Apache::response::answer_footer('imageresponse');
396: return $result;
397: }
398:
399: sub clean_up_image {
400: my ($image)=@_;
401: if ($image =~ /\s*<img\s*/) {
402: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
403: if ($image !~ /^https?\:/) {
404: $image=&Apache::lonnet::hreflocation('',$image);
405: }
406: if (!$image) {
407: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
408: }
409: } else {
410: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
411: &Apache::lonxml::debug("repcopying: $image");
412: if (&Apache::lonnet::repcopy($image) ne 'ok') {
413: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
414: }
415: }
416: return $image;
417: }
418:
419: sub gradefoils {
420: my (@whichopt) = @_;
421:
422: my $partid = $Apache::inputtags::part;
423: my $id = $Apache::inputtags::response['-1'];
424:
425: if ($Apache::lonhomework::type eq 'exam') {
426: &Apache::response::scored_response($partid,$id);
427: return;
428: }
429:
430: my @results;
431: my $temp=1;
432: my %response;
433: foreach my $name (@whichopt) {
434: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
435: $response{$name} = $env{"form.HWVAL_$id:$temp"};
436: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
437: if (defined($x) && defined($y) &&
438: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
439: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
440: my $grade="INCORRECT";
441: foreach my $area (@areas) {
442: &Apache::lonxml::debug("Area is $area for $name");
443: $area =~ m/([a-z]*):/;
444: &Apache::lonxml::debug("Area of type $1");
445: if ($1 eq 'rectangle') {
446: $grade=&grade_rectangle($area,$x,$y);
447: } elsif ($1 eq 'polygon') {
448: $grade=&grade_polygon($area,$x,$y);
449: } else {
450: &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
451: }
452: &Apache::lonxml::debug("Area said $grade");
453: if ($grade eq 'APPROX_ANS') { last; }
454: }
455: &Apache::lonxml::debug("Foil was $grade");
456: push(@results, $grade)
457: } else {
458: push(@results, 'MISSING_ANSWER')
459: }
460: $temp++;
461: }
462: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
463: &Apache::lonxml::debug("Question is $result");
464:
465: my $part=$Apache::inputtags::part;
466: my %previous=
467: &Apache::response::check_for_previous(&stringify_submission(\%response),
468: $part,$id);
469: if ($result) {
470: if ($Apache::lonhomework::type eq 'survey') {
471: $result='SUBMITTED';
472: } elsif ($Apache::lonhomework::type eq 'surveycred') {
473: $result='SUBMITTED_CREDIT';
474: } elsif ($Apache::lonhomework::type eq 'anonsurvey') {
475: $result='ANONYMOUS';
476: } elsif ($Apache::lonhomework::type eq 'anonsurveycred') {
477: $result='ANONYMOUS_CREDIT';
478: }
479: }
480:
481: &Apache::response::handle_previous(\%previous,$result);
482: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
483: &stringify_submission(\%response);
484: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
485: return;
486: }
487:
488: sub stringify_submission {
489: my ($response) = @_;
490: return &Apache::lonnet::hash2str(%{ $response });
491:
492:
493: }
494:
495: sub get_submission {
496: my ($name,$string) = @_;
497:
498: if (!defined($string)) {
499: my $part=$Apache::inputtags::part;
500: my $respid=$Apache::inputtags::response['-1'];
501: $string =
502: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
503: }
504:
505: if ($string !~ /=/) {
506: return split(':',$string);
507: } else {
508: my %response = &Apache::lonnet::str2hash($string);
509: return split(':',$response{$name});
510: }
511: }
512:
513: sub end_foilgroup {
514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
515: my $result='';
516: my @whichopt;
517:
518: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
519: $target eq 'analyze' || $target eq 'answer') {
520:
521: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
522: if ($count>$max) { $count=$max }
523: &Apache::lonxml::debug("Count is $count from $max");
524:
525: @whichopt = &whichfoils($max);
526:
527: if ($target eq 'web' || $target eq 'tex') {
528: $result=&displayfoils($target,@whichopt);
529: $Apache::lonxml::post_evaluate=0;
530: } elsif ($target eq 'grade') {
531: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
532: } elsif ( $target eq 'analyze') {
533: &Apache::response::analyze_store_foilgroup(\@whichopt,
534: ['text','image','area']);
535: } elsif ($target eq 'answer'
536: && $env{'form.answer_output_mode'} ne 'tex') {
537: $result=&display_answers($target,\@whichopt);
538: }
539:
540: } elsif ($target eq 'edit') {
541: $result=&Apache::edit::end_table();
542: }
543: &Apache::response::poprandomnumber();
544: return $result;
545: }
546:
547: sub start_conceptgroup {
548: $Apache::imageresponse::conceptgroup=1;
549: %Apache::response::conceptgroup=();
550: return '';
551: }
552:
553: sub end_conceptgroup {
554: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
555: $Apache::imageresponse::conceptgroup=0;
556: my $result;
557: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
558: $target eq 'analyze') {
559: &Apache::response::pick_foil_for_concept($target,
560: ['area','text','image'],
561: \%Apache::hint::image,
562: $parstack,$safeeval);
563: } elsif ($target eq 'edit') {
564: $result=&Apache::edit::end_table();
565: }
566: return $result;
567: }
568:
569: sub insert_foil {
570: return '
571: <foil>
572: <image></image>
573: <text></text>
574: <rectangle></rectangle>
575: </foil>
576: ';
577: }
578:
579: $Apache::imageresponse::curname='';
580: sub start_foil {
581: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
582: my $result;
583: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
584: $target eq 'analyze' || $target eq 'answer') {
585: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
586: if ($name eq "") {
587: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
588: $name=$Apache::lonxml::curdepth;
589: }
590: if (defined($Apache::response::foilnames{$name})) {
591: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
592: ,'<b><tt>'.$name.'</tt></b>'));
593: }
594: $Apache::response::foilnames{$name}++;
595: if ( $Apache::imageresponse::conceptgroup
596: && !&Apache::response::showallfoils()
597: ) {
598: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
599: } else {
600: push(@{ $Apache::response::foilgroup{'names'} }, $name);
601: }
602: $Apache::imageresponse::curname=$name;
603: } elsif ($target eq 'edit') {
604: $result = &Apache::edit::tag_start($target,$token);
605: $result .= &Apache::edit::text_arg('Name:','name',$token);
606: $result .= &Apache::edit::end_row().
607: &Apache::edit::start_spanning_row();
608: } elsif ($target eq 'modified') {
609: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
610: $safeeval,'name');
611: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
612: }
613: return $result;;
614: }
615:
616: sub end_foil {
617: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
618: my $result;
619: if ($target eq 'edit') {
620: $result=&Apache::edit::end_table();
621: }
622: return $result;
623: }
624:
625: sub start_text {
626: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
627: my $result='';
628: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
629: || $target eq 'answer') {
630: &Apache::lonxml::startredirection;
631: } elsif ($target eq 'edit') {
632: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
633: $result=&Apache::edit::tag_start($target,$token,'Task Description').
634: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
635: &Apache::edit::end_row();
636: } elsif ($target eq "modified") {
637: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
638: }
639: return $result;
640: }
641:
642: sub end_text {
643: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
644: my $result;
645: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
646: || $target eq 'answer') {
647: my $name = $Apache::imageresponse::curname;
648: if ( $Apache::imageresponse::conceptgroup
649: && !&Apache::response::showallfoils()
650: ) {
651: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
652: } else {
653: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
654: }
655: } elsif ($target eq 'edit') {
656: $result=&Apache::edit::end_table();
657: }
658: return $result;
659: }
660:
661: sub start_image {
662: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
663: my $result='';
664: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
665: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
666: || $target eq 'answer') {
667: &Apache::lonxml::startredirection;
668: } elsif ($target eq 'edit') {
669: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
670: $Apache::edit::bgimgsrc=$bgimg;
671: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
672:
673: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
674: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
675: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
676: $result.=&Apache::edit::search(undef,'textnode').
677: &Apache::edit::end_row();
678: } elsif ($target eq "modified") {
679: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
680: }
681: return $result;
682: }
683:
684: sub end_image {
685: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
686: my $result;
687: my $name = $Apache::imageresponse::curname;
688: if ($target eq 'web' || $target eq 'answer') {
689: my $image = &Apache::lonxml::endredirection();
690: &Apache::lonxml::debug("original image is $image");
691: if ( $Apache::imageresponse::conceptgroup
692: && !&Apache::response::showallfoils()
693: ) {
694: $Apache::response::conceptgroup{"$name.image"} = $image;
695: } else {
696: $Apache::response::foilgroup{"$name.image"} = $image;
697: }
698: } elsif ($target eq 'analyze') {
699: my $image = &Apache::lonxml::endredirection();
700: if ( $Apache::imageresponse::conceptgroup
701: && !&Apache::response::showallfoils()
702: ) {
703: $Apache::response::conceptgroup{"$name.image"} = $image;
704: } else {
705: $Apache::response::foilgroup{"$name.image"} = $image;
706: }
707: } elsif ($target eq 'edit') {
708: $result=&Apache::edit::end_table();
709: } elsif ($target eq 'tex') {
710: my $src = &Apache::lonxml::endredirection();
711:
712: # There may be all sorts of whitespace on fore and aft:
713:
714: $src =~ s/\s+$//s;
715: $src =~ s/^\s+//s;
716:
717: #
718: # Gnuplot e.g. just generates the latex to put inplace.
719: #
720: my $graphinclude;
721: if ($src =~ /^%DYNAMICIMAGE/) {
722: # This is needed because the newline is not always passed -> tex.
723: # At present we don't care about the sizing info.
724:
725: my ($commentline, $restofstuff) = split(/\n/, $src);
726: $graphinclude = $src;
727: $graphinclude =~ s/^$commentline//;
728: } elsif (!($src =~ /\\/)) {
729: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
730: my ($height_param,$width_param)=
731: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
732: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
733: } else {
734: $graphinclude = $src; # Already fully formed.
735: }
736: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
737: }
738: return $result;
739: }
740:
741: sub start_rectangle {
742: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
743: my $result='';
744: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
745: $target eq 'analyze' || $target eq 'answer') {
746: &Apache::lonxml::startredirection;
747: } elsif ($target eq 'edit') {
748: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
749: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
750: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
751: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
752: &Apache::edit::end_row();
753: } elsif ($target eq "modified") {
754: &Apache::edit::deletecoorddata();
755: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
756: }
757: return $result;
758: }
759:
760: sub grade_rectangle {
761: my ($spec,$x,$y) = @_;
762: &Apache::lonxml::debug("Spec is $spec");
763: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
764: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
765: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
766: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
767: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
768: return 'APPROX_ANS';
769: }
770: return 'INCORRECT';
771: }
772:
773: sub end_rectangle {
774: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
775: my $result;
776: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
777: $target eq 'analyze' || $target eq 'answer') {
778: my $name = $Apache::imageresponse::curname;
779: my $area = &Apache::lonxml::endredirection;
780: $area=~s/\s//g;
781: &Apache::lonxml::debug("out is $area for $name");
782: if ( $Apache::imageresponse::conceptgroup
783: && !&Apache::response::showallfoils()
784: ) {
785: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
786: } else {
787: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
788: }
789: } elsif ($target eq 'edit') {
790: $result=&Apache::edit::end_table();
791: }
792: return $result;
793: }
794:
795: sub start_polygon {
796: my ($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 $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
803: $result=&Apache::edit::tag_start($target,$token,'Polygon').
804: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
805: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
806: &Apache::edit::end_row();
807: } elsif ($target eq "modified") {
808: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
809: }
810: return $result;
811: }
812:
813: sub grade_polygon {
814: my ($spec,$x,$y) = @_;
815: &Apache::lonxml::debug("Spec is $spec");
816: $spec=~s/^polygon://;
817: my @polygon;
818: foreach my $coord (split('-',$spec)) {
819: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
820: &Apache::lonxml::debug("x $x y $y");
821: push @polygon, {'x'=>$x,'y'=>$y};
822: }
823: #make end point start point
824: push @polygon, $polygon[0];
825: # cribbed from
826: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
827: my $crossing = 0; # the crossing number counter
828:
829: # loop through all edges of the polygon
830: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
831: if ((($polygon[$i]->{'y'} <= $y)
832: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
833: ||
834: (($polygon[$i]->{'y'} > $y)
835: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
836: # compute the actual edge-ray intersect x-coordinate
837: my $vt = ($y - $polygon[$i]->{'y'})
838: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
839: if ($x < $polygon[$i]->{'x'} + $vt *
840: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
841: $crossing++; # a valid crossing of y=P.y right of P.x
842: }
843: }
844: }
845:
846: # 0 if even (out), and 1 if odd (in)
847: if ($crossing%2) {
848: return 'APPROX_ANS';
849: } else {
850: return 'INCORRECT';
851: }
852: }
853:
854: sub end_polygon {
855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
856: my $result;
857: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
858: $target eq 'analyze' || $target eq 'answer') {
859: my $name = $Apache::imageresponse::curname;
860: my $area = &Apache::lonxml::endredirection;
861: $area=~s/\s*//g;
862: &Apache::lonxml::debug("out is $area for $name");
863: if ( $Apache::imageresponse::conceptgroup
864: && !&Apache::response::showallfoils()
865: ) {
866: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
867: } else {
868: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
869: }
870: } elsif ($target eq 'edit') {
871: $result=&Apache::edit::end_table();
872: }
873: return $result;
874: }
875: 1;
876: __END__
877:
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