1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.94 2008/08/08 16:37:13 bisitz 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: package Apache::imageresponse;
33: use strict;
34: use Image::Magick();
35: use Apache::randomlylabel();
36: use Apache::londefdef();
37: use Apache::Constants qw(:common :http);
38: use Apache::lonlocal;
39: use Apache::lonnet;
40: use lib '/home/httpd/lib/perl/';
41: use LONCAPA;
42:
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
46: }
47:
48: sub start_imageresponse {
49: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
50: my $result;
51: #when in a radiobutton response use these
52: &Apache::lonxml::register('Apache::imageresponse',
53: ('foilgroup','foil','text','image','rectangle',
54: 'polygon','conceptgroup'));
55: push (@Apache::lonxml::namespace,'imageresponse');
56: my $id = &Apache::response::start_response($parstack,$safeeval);
57: undef(%Apache::response::foilnames);
58: if ($target eq 'meta') {
59: $result=&Apache::response::meta_package_write('imageresponse');
60: } elsif ($target eq 'analyze') {
61: my $part_id="$Apache::inputtags::part.$id";
62: $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
63: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
64: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
65: 1);
66: } elsif ( $target eq 'edit' ) {
67: $result .= &Apache::edit::tag_start($target,$token).
68: &Apache::edit::text_arg('Max Number Of Shown Foils:',
69: 'max',$token,'4').
70: &Apache::edit::end_row().
71: &Apache::edit::start_spanning_row();
72: } elsif ( $target eq 'modified' ) {
73: my $constructtag=
74: &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
75: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
76: }
77: return $result;
78: }
79:
80: sub end_imageresponse {
81: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
82:
83: my $part_id = $Apache::inputtags::part;
84: my $response_id = $Apache::inputtags::response[-1];
85:
86: pop(@Apache::lonxml::namespace);
87: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
88:
89: my $result;
90: if ($target eq 'edit') {
91: $result=&Apache::edit::end_table();
92: } elsif ($target eq 'tex'
93: && $Apache::lonhomework::type eq 'exam') {
94: $result=&Apache::inputtags::exam_score_line($target);
95: }
96:
97: undef(%Apache::response::foilnames);
98:
99: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
100: $target eq 'tex' || $target eq 'analyze') {
101: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
102: "$part_id.$response_id");
103: if ($target eq 'analyze') {
104: &Apache::lonhomework::set_bubble_lines();
105: }
106:
107: }
108: &Apache::response::end_response();
109:
110: return $result;
111: }
112:
113: %Apache::response::foilgroup=();
114: sub start_foilgroup {
115: %Apache::response::foilgroup=();
116: $Apache::imageresponse::conceptgroup=0;
117: &Apache::response::pushrandomnumber();
118: return '';
119: }
120:
121: sub getfoilcounts {
122: my ($parstack,$safeeval)=@_;
123:
124: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
125: # +1 since instructors will count from 1
126: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
127: if (&Apache::response::showallfoils()) { $max=$count; }
128: return ($count,$max);
129: }
130:
131: sub whichfoils {
132: my ($max)=@_;
133: return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
134: my @names = @{ $Apache::response::foilgroup{'names'} };
135: my @whichopt;
136: while ((($#whichopt+1) < $max) && ($#names > -1)) {
137: &Apache::lonxml::debug("Have $#whichopt max is $max");
138: my $aopt;
139: if (&Apache::response::showallfoils()) {
140: $aopt=0;
141: } else {
142: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
143: }
144: &Apache::lonxml::debug("From $#names elms, picking $aopt");
145: $aopt=splice(@names,$aopt,1);
146: &Apache::lonxml::debug("Picked $aopt");
147: push(@whichopt,$aopt);
148: }
149: return @whichopt;
150: }
151:
152: sub prep_image {
153: my ($image,$mode,$name)=@_;
154:
155: my ($x,$y)= &get_submission($name);
156: &Apache::lonxml::debug("for $name drawing click at $x and $y");
157: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
158: }
159:
160: sub draw_image {
161: my ($mode,$image,$x,$y,$areas) = @_;
162:
163: my $id=&Apache::loncommon::get_cgi_id();
164:
165: my (%x,$i);
166: $x{"cgi.$id.BGIMG"}=&escape($image);
167:
168: #draws 2 xs on the image at the clicked location
169: #one in white and then one in red on top of the one in white
170:
171: if (defined($x) && $x =~/\S/
172: && defined($y) && $y =~/\S/
173: && ($mode eq 'submission' || !&Apache::response::show_answer())
174: && $mode ne 'answeronly') {
175: my $length = 6;
176: my $width = 1;
177: my $extrawidth = 2;
178: my $xmin=($x-$length);
179: my $xmax=($x+$length);
180: my $ymin=($y-$length);
181: my $ymax=($y+$length);
182:
183: $x{"cgi.$id.OBJTYPE"}.='LINE:';
184: $i=$x{"cgi.$id.OBJCOUNT"}++;
185: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
186: "FFFFFF",($width+$extrawidth)));
187: $x{"cgi.$id.OBJTYPE"}.='LINE:';
188: $i=$x{"cgi.$id.OBJCOUNT"}++;
189: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
190: "FFFFFF",($width+$extrawidth)));
191: $x{"cgi.$id.OBJTYPE"}.='LINE:';
192: $i=$x{"cgi.$id.OBJCOUNT"}++;
193: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
194: "FF0000",($width)));
195: $x{"cgi.$id.OBJTYPE"}.='LINE:';
196: $i=$x{"cgi.$id.OBJCOUNT"}++;
197: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
198: "FF0000",($width)));
199: }
200: if ($mode eq 'answer' || $mode eq 'answeronly') {
201: my $width = 1;
202: my $extrawidth = 2;
203: foreach my $area (@{ $areas }) {
204: if ($area=~/^rectangle:/) {
205: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
206: $i=$x{"cgi.$id.OBJCOUNT"}++;
207: my ($x1,$y1,$x2,$y2)=
208: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
209: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
210: ($width+$extrawidth)));
211: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
212: $i=$x{"cgi.$id.OBJCOUNT"}++;
213: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
214: } elsif ($area=~/^polygon:(.*)/) {
215: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
216: $i=$x{"cgi.$id.OBJCOUNT"}++;
217: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
218: $x{"cgi.$id.OBJEXTRA$i"}=$1;
219: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
220: $i=$x{"cgi.$id.OBJCOUNT"}++;
221: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
222: $x{"cgi.$id.OBJEXTRA$i"}=$1;
223: }
224: }
225: }
226: &Apache::lonnet::appenv(\%x);
227: return $id;
228: }
229:
230: sub displayfoils {
231: my ($target,@whichopt) = @_;
232: my $result ='';
233: my $temp=1;
234: my @images;
235: foreach my $name (@whichopt) {
236: $result.=$Apache::response::foilgroup{"$name.text"};
237: &Apache::lonxml::debug("Text is $result");
238: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
239: my $image=$Apache::response::foilgroup{"$name.image"};
240: &Apache::lonxml::debug("image is $image");
241: if ( ($target eq 'web' || $target eq 'answer')
242: && $image !~ /^http:/ ) {
243: $image=&clean_up_image($image);
244: }
245: push(@images,$image);
246: &Apache::lonxml::debug("image is $image");
247: if ( &Apache::response::show_answer() ) {
248: if ($target eq 'tex') {
249: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
250: } else {
251: my $token=&prep_image($image,'answer',$name);
252: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
253: }
254: } else {
255: if ($target eq 'tex') {
256: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
257: } else {
258: my $respid=$Apache::inputtags::response['-1'];
259: my $token=&prep_image($image,'submission',$name);
260: my $input_id = "HWVAL_$respid:$temp";
261: my $id = $env{'form.request.prefix'}.$input_id;
262: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
263: src="/adm/randomlabel.png?token='.$token.'"
264: id="'.$id.'_imageresponse"
265: />'.
266: '<br />'.
267: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
268: '<input type="hidden" name="'.$input_id.'" value="'.
269: join(':',&get_submission($name)).'" />';
270: }
271: }
272: $temp++;
273: }
274: if ($target eq 'web') {
275: &Apache::response::setup_prior_tries_hash(\&format_prior_response,
276: [\@images,\@whichopt]);
277: }
278: return $result;
279: }
280:
281: sub format_prior_response {
282: my ($mode,$answer,$other_data) = @_;
283:
284: my $result;
285:
286: # make a copy of the data in the refs
287: my @images = @{ $other_data->[0] };
288: my @foils = @{ $other_data->[1] };
289: foreach my $name (@foils) {
290: my $image = pop(@images);
291: my ($x,$y) = &get_submission($name,$answer);
292: my $token = &draw_image('submission',$image,$x,$y);
293: $result .=
294: '<img class="LC_prior_image"
295: src="/adm/randomlabel.png?token='.$token.'" /><br />';
296: }
297: return $result;
298: }
299:
300: sub display_answers {
301: my ($target,$whichopt)=@_;
302:
303: my $result=&Apache::response::answer_header('imageresponse');
304: foreach my $name (@$whichopt) {
305: my $image=$Apache::response::foilgroup{"$name.image"};
306: &Apache::lonxml::debug("image is $image");
307: if ( ($target eq 'web' || $target eq 'answer')
308: && $image !~ /^http:/ ) {
309: $image = &clean_up_image($image);
310: }
311: my $token=&prep_image($image,'answeronly',$name);
312:
313: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
314: }
315: $result.=&Apache::response::answer_footer('imageresponse');
316: return $result;
317: }
318:
319: sub clean_up_image {
320: my ($image)=@_;
321: if ($image =~ /\s*<img\s*/) {
322: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
323: if ($image !~ /^http:/) {
324: $image=&Apache::lonnet::hreflocation('',$image);
325: }
326: if (!$image) {
327: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
328: }
329: } else {
330: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
331: &Apache::lonxml::debug("repcopying: $image");
332: if (&Apache::lonnet::repcopy($image) ne 'ok') {
333: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
334: }
335: }
336: return $image;
337: }
338:
339: sub gradefoils {
340: my (@whichopt) = @_;
341:
342: my $partid = $Apache::inputtags::part;
343: my $id = $Apache::inputtags::response['-1'];
344:
345: if ($Apache::lonhomework::type eq 'exam') {
346: &Apache::response::scored_response($partid,$id);
347: return;
348: }
349:
350: my @results;
351: my $temp=1;
352: my %response;
353: foreach my $name (@whichopt) {
354: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
355: $response{$name} = $env{"form.HWVAL_$id:$temp"};
356: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
357: if (defined($x) && defined($y) &&
358: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
359: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
360: my $grade="INCORRECT";
361: foreach my $area (@areas) {
362: &Apache::lonxml::debug("Area is $area for $name");
363: $area =~ m/([a-z]*):/;
364: &Apache::lonxml::debug("Area of type $1");
365: if ($1 eq 'rectangle') {
366: $grade=&grade_rectangle($area,$x,$y);
367: } elsif ($1 eq 'polygon') {
368: $grade=&grade_polygon($area,$x,$y);
369: } else {
370: &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
371: }
372: &Apache::lonxml::debug("Area said $grade");
373: if ($grade eq 'APPROX_ANS') { last; }
374: }
375: &Apache::lonxml::debug("Foil was $grade");
376: push(@results, $grade)
377: } else {
378: push(@results, 'MISSING_ANSWER')
379: }
380: $temp++;
381: }
382: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
383: &Apache::lonxml::debug("Question is $result");
384:
385: my $part=$Apache::inputtags::part;
386: my %previous=
387: &Apache::response::check_for_previous(&stringify_submission(\%response),
388: $part,$id);
389: if ($result
390: && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
391: &Apache::response::handle_previous(\%previous,$result);
392: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
393: &stringify_submission(\%response);
394: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
395: return;
396: }
397:
398: sub stringify_submission {
399: my ($response) = @_;
400: return &Apache::lonnet::hash2str(%{ $response });
401:
402:
403: }
404:
405: sub get_submission {
406: my ($name,$string) = @_;
407:
408: if (!defined($string)) {
409: my $part=$Apache::inputtags::part;
410: my $respid=$Apache::inputtags::response['-1'];
411: $string =
412: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
413: }
414:
415: if ($string !~ /=/) {
416: return split(':',$string);
417: } else {
418: my %response = &Apache::lonnet::str2hash($string);
419: return split(':',$response{$name});
420: }
421: }
422:
423: sub end_foilgroup {
424: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
425: my $result='';
426: my @whichopt;
427:
428: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
429: $target eq 'analyze' || $target eq 'answer') {
430:
431: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
432: if ($count>$max) { $count=$max }
433: &Apache::lonxml::debug("Count is $count from $max");
434:
435: @whichopt = &whichfoils($max);
436:
437: if ($target eq 'web' || $target eq 'tex') {
438: $result=&displayfoils($target,@whichopt);
439: $Apache::lonxml::post_evaluate=0;
440: } elsif ($target eq 'grade') {
441: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
442: } elsif ( $target eq 'analyze') {
443: &Apache::response::analyze_store_foilgroup(\@whichopt,
444: ['text','image','area']);
445: } elsif ($target eq 'answer'
446: && $env{'form.answer_output_mode'} ne 'tex') {
447: $result=&display_answers($target,\@whichopt);
448: }
449:
450: } elsif ($target eq 'edit') {
451: $result=&Apache::edit::end_table();
452: }
453: &Apache::response::poprandomnumber();
454: return $result;
455: }
456:
457: sub start_conceptgroup {
458: $Apache::imageresponse::conceptgroup=1;
459: %Apache::response::conceptgroup=();
460: return '';
461: }
462:
463: sub end_conceptgroup {
464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
465: $Apache::imageresponse::conceptgroup=0;
466: my $result;
467: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
468: $target eq 'analyze') {
469: &Apache::response::pick_foil_for_concept($target,
470: ['area','text','image'],
471: \%Apache::hint::image,
472: $parstack,$safeeval);
473: } elsif ($target eq 'edit') {
474: $result=&Apache::edit::end_table();
475: }
476: return $result;
477: }
478:
479: sub insert_foil {
480: return '
481: <foil>
482: <image></image>
483: <text></text>
484: <rectangle></rectangle>
485: </foil>
486: ';
487: }
488:
489: $Apache::imageresponse::curname='';
490: sub start_foil {
491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
492: my $result;
493: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
494: $target eq 'analyze' || $target eq 'answer') {
495: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
496: if ($name eq "") {
497: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
498: $name=$Apache::lonxml::curdepth;
499: }
500: if (defined($Apache::response::foilnames{$name})) {
501: &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
502: ,'<b><tt>'.$name.'</tt></b>'));
503: }
504: $Apache::response::foilnames{$name}++;
505: if ( $Apache::imageresponse::conceptgroup
506: && !&Apache::response::showallfoils()
507: ) {
508: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
509: } else {
510: push(@{ $Apache::response::foilgroup{'names'} }, $name);
511: }
512: $Apache::imageresponse::curname=$name;
513: } elsif ($target eq 'edit') {
514: $result = &Apache::edit::tag_start($target,$token);
515: $result .= &Apache::edit::text_arg('Name:','name',$token);
516: $result .= &Apache::edit::end_row().
517: &Apache::edit::start_spanning_row();
518: } elsif ($target eq 'modified') {
519: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
520: $safeeval,'name');
521: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
522: }
523: return $result;;
524: }
525:
526: sub end_foil {
527: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
528: my $result;
529: if ($target eq 'edit') {
530: $result=&Apache::edit::end_table();
531: }
532: return $result;
533: }
534:
535: sub start_text {
536: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
537: my $result='';
538: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
539: || $target eq 'answer') {
540: &Apache::lonxml::startredirection;
541: } elsif ($target eq 'edit') {
542: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
543: $result=&Apache::edit::tag_start($target,$token,'Task Description').
544: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
545: &Apache::edit::end_row();
546: } elsif ($target eq "modified") {
547: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
548: }
549: return $result;
550: }
551:
552: sub end_text {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
554: my $result;
555: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
556: || $target eq 'answer') {
557: my $name = $Apache::imageresponse::curname;
558: if ( $Apache::imageresponse::conceptgroup
559: && !&Apache::response::showallfoils()
560: ) {
561: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
562: } else {
563: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
564: }
565: } elsif ($target eq 'edit') {
566: $result=&Apache::edit::end_table();
567: }
568: return $result;
569: }
570:
571: sub start_image {
572: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
573: my $result='';
574: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
575: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
576: || $target eq 'answer') {
577: &Apache::lonxml::startredirection;
578: } elsif ($target eq 'edit') {
579: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
580: $Apache::edit::bgimgsrc=$bgimg;
581: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
582:
583: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
584: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
585: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
586: $result.=&Apache::edit::search(undef,'textnode').
587: &Apache::edit::end_row();
588: } elsif ($target eq "modified") {
589: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
590: }
591: return $result;
592: }
593:
594: sub end_image {
595: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
596: my $result;
597: my $name = $Apache::imageresponse::curname;
598: if ($target eq 'web' || $target eq 'answer') {
599: my $image = &Apache::lonxml::endredirection();
600: &Apache::lonxml::debug("original image is $image");
601: if ( $Apache::imageresponse::conceptgroup
602: && !&Apache::response::showallfoils()
603: ) {
604: $Apache::response::conceptgroup{"$name.image"} = $image;
605: } else {
606: $Apache::response::foilgroup{"$name.image"} = $image;
607: }
608: } elsif ($target eq 'analyze') {
609: my $image = &Apache::lonxml::endredirection();
610: if ( $Apache::imageresponse::conceptgroup
611: && !&Apache::response::showallfoils()
612: ) {
613: $Apache::response::conceptgroup{"$name.image"} = $image;
614: } else {
615: $Apache::response::foilgroup{"$name.image"} = $image;
616: }
617: } elsif ($target eq 'edit') {
618: $result=&Apache::edit::end_table();
619: } elsif ($target eq 'tex') {
620: my $src = &Apache::lonxml::endredirection();
621:
622: # There may be all sorts of whitespace on fore and aft:
623:
624: $src =~ s/\s+$//s;
625: $src =~ s/^\s+//s;
626:
627: #
628: # Gnuplot e.g. just generates the latex to put inplace.
629: #
630: my $graphinclude;
631: if ($src =~ /^%DYNAMICIMAGE/) {
632: # This is needed because the newline is not always passed -> tex.
633: # At present we don't care about the sizing info.
634:
635: my ($commentline, $restofstuff) = split(/\n/, $src);
636: $graphinclude = $src;
637: $graphinclude =~ s/^$commentline//;
638: } else {
639: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
640: my ($height_param,$width_param)=
641: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
642: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
643: }
644: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
645: }
646: return $result;
647: }
648:
649: sub start_rectangle {
650: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
651: my $result='';
652: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
653: $target eq 'analyze' || $target eq 'answer') {
654: &Apache::lonxml::startredirection;
655: } elsif ($target eq 'edit') {
656: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
657: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
658: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
659: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
660: &Apache::edit::end_row();
661: } elsif ($target eq "modified") {
662: &Apache::edit::deletecoorddata();
663: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
664: }
665: return $result;
666: }
667:
668: sub grade_rectangle {
669: my ($spec,$x,$y) = @_;
670: &Apache::lonxml::debug("Spec is $spec");
671: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
672: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
673: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
674: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
675: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
676: return 'APPROX_ANS';
677: }
678: return 'INCORRECT';
679: }
680:
681: sub end_rectangle {
682: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
683: my $result;
684: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
685: $target eq 'analyze' || $target eq 'answer') {
686: my $name = $Apache::imageresponse::curname;
687: my $area = &Apache::lonxml::endredirection;
688: $area=~s/\s//g;
689: &Apache::lonxml::debug("out is $area for $name");
690: if ( $Apache::imageresponse::conceptgroup
691: && !&Apache::response::showallfoils()
692: ) {
693: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
694: } else {
695: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
696: }
697: } elsif ($target eq 'edit') {
698: $result=&Apache::edit::end_table();
699: }
700: return $result;
701: }
702:
703: sub start_polygon {
704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
705: my $result='';
706: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
707: $target eq 'analyze' || $target eq 'answer') {
708: &Apache::lonxml::startredirection;
709: } elsif ($target eq 'edit') {
710: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
711: $result=&Apache::edit::tag_start($target,$token,'Polygon').
712: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
713: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
714: &Apache::edit::end_row();
715: } elsif ($target eq "modified") {
716: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
717: }
718: return $result;
719: }
720:
721: sub grade_polygon {
722: my ($spec,$x,$y) = @_;
723: &Apache::lonxml::debug("Spec is $spec");
724: $spec=~s/^polygon://;
725: my @polygon;
726: foreach my $coord (split('-',$spec)) {
727: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
728: &Apache::lonxml::debug("x $x y $y");
729: push @polygon, {'x'=>$x,'y'=>$y};
730: }
731: #make end point start point
732: push @polygon, $polygon[0];
733: # cribbed from
734: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
735: my $crossing = 0; # the crossing number counter
736:
737: # loop through all edges of the polygon
738: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
739: if ((($polygon[$i]->{'y'} <= $y)
740: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
741: ||
742: (($polygon[$i]->{'y'} > $y)
743: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
744: # compute the actual edge-ray intersect x-coordinate
745: my $vt = ($y - $polygon[$i]->{'y'})
746: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
747: if ($x < $polygon[$i]->{'x'} + $vt *
748: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
749: $crossing++; # a valid crossing of y=P.y right of P.x
750: }
751: }
752: }
753:
754: # 0 if even (out), and 1 if odd (in)
755: if ($crossing%2) {
756: return 'APPROX_ANS';
757: } else {
758: return 'INCORRECT';
759: }
760: }
761:
762: sub end_polygon {
763: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
764: my $result;
765: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
766: $target eq 'analyze' || $target eq 'answer') {
767: my $name = $Apache::imageresponse::curname;
768: my $area = &Apache::lonxml::endredirection;
769: $area=~s/\s*//g;
770: &Apache::lonxml::debug("out is $area for $name");
771: if ( $Apache::imageresponse::conceptgroup
772: && !&Apache::response::showallfoils()
773: ) {
774: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
775: } else {
776: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
777: }
778: } elsif ($target eq 'edit') {
779: $result=&Apache::edit::end_table();
780: }
781: return $result;
782: }
783: 1;
784: __END__
785:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to imageresponse.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / homework