1: #
2: # The LearningOnline Network with CAPA
3: # image click response style
4: #
5: # $Id: imageresponse.pm,v 1.89 2007/10/08 09:22:50 foxr 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: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
63: push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
64: 1);
65: } elsif ( $target eq 'edit' ) {
66: $result .= &Apache::edit::tag_start($target,$token).
67: &Apache::edit::text_arg('Max Number Of Shown Foils:',
68: 'max',$token,'4').
69: &Apache::edit::end_row().
70: &Apache::edit::start_spanning_row();
71: } elsif ( $target eq 'modified' ) {
72: my $constructtag=
73: &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
74: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
75: }
76: return $result;
77: }
78:
79: sub end_imageresponse {
80: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
81:
82: my $part_id = $Apache::inputtags::part;
83:
84: pop(@Apache::lonxml::namespace);
85: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
86:
87: my $result;
88: if ($target eq 'edit') {
89: $result=&Apache::edit::end_table();
90: } elsif ($target eq 'tex'
91: && $Apache::lonhomework::type eq 'exam') {
92: $result=&Apache::inputtags::exam_score_line($target);
93: }
94:
95: undef(%Apache::response::foilnames);
96:
97: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
98: $target eq 'tex' || $target eq 'analyze') {
99: &Apache::lonxml::increment_counter(&Apache::response::repetition(),
100: $part_id);
101: if ($target eq 'analyze') {
102: &Apache::lonhomework::set_bubble_lines();
103: }
104:
105: }
106: &Apache::response::end_response();
107:
108: return $result;
109: }
110:
111: %Apache::response::foilgroup=();
112: sub start_foilgroup {
113: %Apache::response::foilgroup=();
114: $Apache::imageresponse::conceptgroup=0;
115: &Apache::response::pushrandomnumber();
116: return '';
117: }
118:
119: sub getfoilcounts {
120: my ($parstack,$safeeval)=@_;
121:
122: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
123: # +1 since instructors will count from 1
124: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
125: if (&Apache::response::showallfoils()) { $max=$count; }
126: return ($count,$max);
127: }
128:
129: sub whichfoils {
130: my ($max)=@_;
131: return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
132: my @names = @{ $Apache::response::foilgroup{'names'} };
133: my @whichopt;
134: while ((($#whichopt+1) < $max) && ($#names > -1)) {
135: &Apache::lonxml::debug("Have $#whichopt max is $max");
136: my $aopt;
137: if (&Apache::response::showallfoils()) {
138: $aopt=0;
139: } else {
140: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
141: }
142: &Apache::lonxml::debug("From $#names elms, picking $aopt");
143: $aopt=splice(@names,$aopt,1);
144: &Apache::lonxml::debug("Picked $aopt");
145: push(@whichopt,$aopt);
146: }
147: return @whichopt;
148: }
149:
150: sub prep_image {
151: my ($image,$mode,$name)=@_;
152:
153: my ($x,$y)= &get_submission($name);
154: &Apache::lonxml::debug("for $name drawing click at $x and $y");
155: &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
156: }
157:
158: sub draw_image {
159: my ($mode,$image,$x,$y,$areas) = @_;
160:
161: my $id=&Apache::loncommon::get_cgi_id();
162:
163: my (%x,$i);
164: $x{"cgi.$id.BGIMG"}=&escape($image);
165:
166: #draws 2 xs on the image at the clicked location
167: #one in white and then one in red on top of the one in white
168:
169: if (defined($x) && $x =~/\S/
170: && defined($y) && $y =~/\S/
171: && ($mode eq 'submission' || !&Apache::response::show_answer())
172: && $mode ne 'answeronly') {
173: my $length = 6;
174: my $width = 1;
175: my $extrawidth = 2;
176: my $xmin=($x-$length);
177: my $xmax=($x+$length);
178: my $ymin=($y-$length);
179: my $ymax=($y+$length);
180:
181: $x{"cgi.$id.OBJTYPE"}.='LINE:';
182: $i=$x{"cgi.$id.OBJCOUNT"}++;
183: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
184: "FFFFFF",($width+$extrawidth)));
185: $x{"cgi.$id.OBJTYPE"}.='LINE:';
186: $i=$x{"cgi.$id.OBJCOUNT"}++;
187: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
188: "FFFFFF",($width+$extrawidth)));
189: $x{"cgi.$id.OBJTYPE"}.='LINE:';
190: $i=$x{"cgi.$id.OBJCOUNT"}++;
191: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
192: "FF0000",($width)));
193: $x{"cgi.$id.OBJTYPE"}.='LINE:';
194: $i=$x{"cgi.$id.OBJCOUNT"}++;
195: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
196: "FF0000",($width)));
197: }
198: if ($mode eq 'answer' || $mode eq 'answeronly') {
199: my $width = 1;
200: my $extrawidth = 2;
201: foreach my $area (@{ $areas }) {
202: if ($area=~/^rectangle:/) {
203: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
204: $i=$x{"cgi.$id.OBJCOUNT"}++;
205: my ($x1,$y1,$x2,$y2)=
206: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
207: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
208: ($width+$extrawidth)));
209: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
210: $i=$x{"cgi.$id.OBJCOUNT"}++;
211: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
212: } elsif ($area=~/^polygon:(.*)/) {
213: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
214: $i=$x{"cgi.$id.OBJCOUNT"}++;
215: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
216: $x{"cgi.$id.OBJEXTRA$i"}=$1;
217: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
218: $i=$x{"cgi.$id.OBJCOUNT"}++;
219: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
220: $x{"cgi.$id.OBJEXTRA$i"}=$1;
221: }
222: }
223: }
224: &Apache::lonnet::appenv(%x);
225: return $id;
226: }
227:
228: sub displayfoils {
229: my ($target,@whichopt) = @_;
230: my $result ='';
231: my $temp=1;
232: my @images;
233: foreach my $name (@whichopt) {
234: $result.=$Apache::response::foilgroup{"$name.text"};
235: &Apache::lonxml::debug("Text is $result");
236: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
237: my $image=$Apache::response::foilgroup{"$name.image"};
238: &Apache::lonxml::debug("image is $image");
239: if ( $target eq 'web' && $image !~ /^http:/ ) {
240: $image=&clean_up_image($image);
241: }
242: push(@images,$image);
243: &Apache::lonxml::debug("image is $image");
244: if ( &Apache::response::show_answer() ) {
245: if ($target eq 'tex') {
246: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
247: } else {
248: my $token=&prep_image($image,'answer',$name);
249: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
250: }
251: } else {
252: if ($target eq 'tex') {
253: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
254: } else {
255: my $respid=$Apache::inputtags::response['-1'];
256: my $token=&prep_image($image,'submission',$name);
257: my $input_id = "HWVAL_$respid:$temp";
258: my $id = $env{'form.request.prefix'}.$input_id;
259: $result.='<img onclick="image_response_click(\''.$id.'\',event);"
260: src="/adm/randomlabel.png?token='.$token.'"
261: id="'.$id.'_imageresponse"
262: />'.
263: '<br />'.
264: '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
265: '<input type="hidden" name="'.$input_id.'" value="'.
266: join(':',&get_submission($name)).'" />';
267: }
268: }
269: $temp++;
270: }
271: if ($target eq 'web') {
272: &Apache::response::setup_prior_tries_hash(\&format_prior_response,
273: [\@images,\@whichopt]);
274: }
275: return $result;
276: }
277:
278: sub format_prior_response {
279: my ($mode,$answer,$other_data) = @_;
280:
281: my $result;
282:
283: # make a copy of the data in the refs
284: my @images = @{ $other_data->[0] };
285: my @foils = @{ $other_data->[1] };
286: foreach my $name (@foils) {
287: my $image = pop(@images);
288: my ($x,$y) = &get_submission($name,$answer);
289: my $token = &draw_image('submission',$image,$x,$y);
290: $result .=
291: '<img class="LC_prior_image"
292: src="/adm/randomlabel.png?token='.$token.'" /><br />';
293: }
294: return $result;
295: }
296:
297: sub display_answers {
298: my ($target,$whichopt)=@_;
299:
300: my $result=&Apache::response::answer_header('imageresponse');
301: foreach my $name (@$whichopt) {
302: my $image=$Apache::response::foilgroup{"$name.image"};
303: &Apache::lonxml::debug("image is $image");
304: if ( $target eq 'web' && $image !~ /^http:/ ) {
305: $image = &clean_up_image($image);
306: }
307: my $token=&prep_image($image,'answeronly',$name);
308:
309: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
310: }
311: $result.=&Apache::response::answer_footer('imageresponse');
312: return $result;
313: }
314:
315: sub clean_up_image {
316: my ($image)=@_;
317: if ($image =~ /\s*<img\s*/) {
318: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
319: if ($image !~ /^http:/) {
320: $image=&Apache::lonnet::hreflocation('',$image);
321: }
322: if (!$image) {
323: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
324: }
325: } else {
326: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
327: &Apache::lonxml::debug("repcopying: $image");
328: if (&Apache::lonnet::repcopy($image) ne 'ok') {
329: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
330: }
331: }
332: return $image;
333: }
334:
335: sub gradefoils {
336: my (@whichopt) = @_;
337:
338: my $partid = $Apache::inputtags::part;
339: my $id = $Apache::inputtags::response['-1'];
340:
341: if ($Apache::lonhomework::type eq 'exam') {
342: &Apache::response::scored_response($partid,$id);
343: return;
344: }
345:
346: my @results;
347: my $temp=1;
348: my %response;
349: foreach my $name (@whichopt) {
350: my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
351: $response{$name} = $env{"form.HWVAL_$id:$temp"};
352: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
353: if (defined($x) && defined($y) &&
354: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
355: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
356: my $grade="INCORRECT";
357: foreach my $area (@areas) {
358: &Apache::lonxml::debug("Area is $area for $name");
359: $area =~ m/([a-z]*):/;
360: &Apache::lonxml::debug("Area of type $1");
361: if ($1 eq 'rectangle') {
362: $grade=&grade_rectangle($area,$x,$y);
363: } elsif ($1 eq 'polygon') {
364: $grade=&grade_polygon($area,$x,$y);
365: } else {
366: &Apache::lonxml::error("Unknown area style $area");
367: }
368: &Apache::lonxml::debug("Area said $grade");
369: if ($grade eq 'APPROX_ANS') { last; }
370: }
371: &Apache::lonxml::debug("Foil was $grade");
372: push(@results, $grade)
373: } else {
374: push(@results, 'MISSING_ANSWER')
375: }
376: $temp++;
377: }
378: my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
379: &Apache::lonxml::debug("Question is $result");
380:
381: my $part=$Apache::inputtags::part;
382: my %previous=
383: &Apache::response::check_for_previous(&stringify_submission(\%response),
384: $part,$id);
385: if ($result
386: && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
387: &Apache::response::handle_previous(\%previous,$result);
388: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
389: &stringify_submission(\%response);
390: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
391: return;
392: }
393:
394: sub stringify_submission {
395: my ($response) = @_;
396: return &Apache::lonnet::hash2str(%{ $response });
397:
398:
399: }
400:
401: sub get_submission {
402: my ($name,$string) = @_;
403:
404: if (!defined($string)) {
405: my $part=$Apache::inputtags::part;
406: my $respid=$Apache::inputtags::response['-1'];
407: $string =
408: $Apache::lonhomework::history{"resource.$part.$respid.submission"};
409: }
410:
411: if ($string !~ /=/) {
412: return split(':',$string);
413: } else {
414: my %response = &Apache::lonnet::str2hash($string);
415: return split(':',$response{$name});
416: }
417: }
418:
419: sub end_foilgroup {
420: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
421: my $result='';
422: my @whichopt;
423:
424: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
425: $target eq 'analyze' || $target eq 'answer') {
426:
427: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
428: if ($count>$max) { $count=$max }
429: &Apache::lonxml::debug("Count is $count from $max");
430:
431: @whichopt = &whichfoils($max);
432:
433: if ($target eq 'web' || $target eq 'tex') {
434: $result=&displayfoils($target,@whichopt);
435: $Apache::lonxml::post_evaluate=0;
436: } elsif ($target eq 'grade') {
437: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
438: } elsif ( $target eq 'analyze') {
439: &Apache::response::analyze_store_foilgroup(\@whichopt,
440: ['text','image','area']);
441: } elsif ($target eq 'answer'
442: && $env{'form.answer_output_mode'} ne 'tex') {
443: $result=&display_answers($target,\@whichopt);
444: }
445:
446: } elsif ($target eq 'edit') {
447: $result=&Apache::edit::end_table();
448: }
449: &Apache::response::poprandomnumber();
450: return $result;
451: }
452:
453: sub start_conceptgroup {
454: $Apache::imageresponse::conceptgroup=1;
455: %Apache::response::conceptgroup=();
456: return '';
457: }
458:
459: sub end_conceptgroup {
460: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
461: $Apache::imageresponse::conceptgroup=0;
462: my $result;
463: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
464: $target eq 'analyze') {
465: &Apache::response::pick_foil_for_concept($target,
466: ['area','text','image'],
467: \%Apache::hint::image,
468: $parstack,$safeeval);
469: } elsif ($target eq 'edit') {
470: $result=&Apache::edit::end_table();
471: }
472: return $result;
473: }
474:
475: sub insert_foil {
476: return '
477: <foil>
478: <image></image>
479: <text></text>
480: <rectangle></rectangle>
481: </foil>
482: ';
483: }
484:
485: $Apache::imageresponse::curname='';
486: sub start_foil {
487: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
488: my $result;
489: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
490: $target eq 'analyze' || $target eq 'answer') {
491: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
492: if ($name eq "") {
493: &Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
494: $name=$Apache::lonxml::curdepth;
495: }
496: if (defined($Apache::response::foilnames{$name})) {
497: &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
498: }
499: $Apache::response::foilnames{$name}++;
500: if ( $Apache::imageresponse::conceptgroup
501: && !&Apache::response::showallfoils()
502: ) {
503: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
504: } else {
505: push(@{ $Apache::response::foilgroup{'names'} }, $name);
506: }
507: $Apache::imageresponse::curname=$name;
508: } elsif ($target eq 'edit') {
509: $result = &Apache::edit::tag_start($target,$token);
510: $result .= &Apache::edit::text_arg('Name:','name',$token);
511: $result .= &Apache::edit::end_row().
512: &Apache::edit::start_spanning_row();
513: } elsif ($target eq 'modified') {
514: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
515: $safeeval,'name');
516: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
517: }
518: return $result;;
519: }
520:
521: sub end_foil {
522: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
523: my $result;
524: if ($target eq 'edit') {
525: $result=&Apache::edit::end_table();
526: }
527: return $result;
528: }
529:
530: sub start_text {
531: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
532: my $result='';
533: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
534: || $target eq 'answer') {
535: &Apache::lonxml::startredirection;
536: } elsif ($target eq 'edit') {
537: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
538: $result=&Apache::edit::tag_start($target,$token,'Task Description').
539: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
540: &Apache::edit::end_row();
541: } elsif ($target eq "modified") {
542: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
543: }
544: return $result;
545: }
546:
547: sub end_text {
548: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
549: my $result;
550: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
551: || $target eq 'answer') {
552: my $name = $Apache::imageresponse::curname;
553: if ( $Apache::imageresponse::conceptgroup
554: && !&Apache::response::showallfoils()
555: ) {
556: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
557: } else {
558: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
559: }
560: } elsif ($target eq 'edit') {
561: $result=&Apache::edit::end_table();
562: }
563: return $result;
564: }
565:
566: sub start_image {
567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
568: my $result='';
569: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
570: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
571: || $target eq 'answer') {
572: &Apache::lonxml::startredirection;
573: } elsif ($target eq 'edit') {
574: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
575: $Apache::edit::bgimgsrc=$bgimg;
576: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
577:
578: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
579: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
580: $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
581: $result.=&Apache::edit::search(undef,'textnode').
582: &Apache::edit::end_row();
583: } elsif ($target eq "modified") {
584: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
585: }
586: return $result;
587: }
588:
589: sub end_image {
590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
591: my $result;
592: my $name = $Apache::imageresponse::curname;
593: if ($target eq 'web' || $target eq 'answer') {
594: my $image = &Apache::lonxml::endredirection();
595: &Apache::lonxml::debug("original image is $image");
596: if ( $Apache::imageresponse::conceptgroup
597: && !&Apache::response::showallfoils()
598: ) {
599: $Apache::response::conceptgroup{"$name.image"} = $image;
600: } else {
601: $Apache::response::foilgroup{"$name.image"} = $image;
602: }
603: } elsif ($target eq 'analyze') {
604: my $image = &Apache::lonxml::endredirection();
605: if ( $Apache::imageresponse::conceptgroup
606: && !&Apache::response::showallfoils()
607: ) {
608: $Apache::response::conceptgroup{"$name.image"} = $image;
609: } else {
610: $Apache::response::foilgroup{"$name.image"} = $image;
611: }
612: } elsif ($target eq 'edit') {
613: $result=&Apache::edit::end_table();
614: } elsif ($target eq 'tex') {
615: my $src = &Apache::lonxml::endredirection();
616:
617: # There may be all sorts of whitespace on fore and aft:
618:
619: $src =~ s/\s+$//s;
620: $src =~ s/^\s+//s;
621:
622: #
623: # Gnuplot e.g. just generates the latex to put inplace.
624: #
625: my $graphinclude;
626: if ($src =~ /^%DYNAMICIMAGE/) {
627: # This is needed because the newline is not always passed -> tex.
628: # At present we don't care about the sizing info.
629:
630: my ($commentline, $restofstuff) = split(/\n/, $src);
631: $graphinclude = $src;
632: $graphinclude =~ s/^$commentline//;
633: } else {
634: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
635: my ($height_param,$width_param)=
636: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
637: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
638: }
639: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
640: }
641: return $result;
642: }
643:
644: sub start_rectangle {
645: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
646: my $result='';
647: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
648: $target eq 'analyze' || $target eq 'answer') {
649: &Apache::lonxml::startredirection;
650: } elsif ($target eq 'edit') {
651: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
652: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
653: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
654: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
655: &Apache::edit::end_row();
656: } elsif ($target eq "modified") {
657: &Apache::edit::deletecoorddata();
658: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
659: }
660: return $result;
661: }
662:
663: sub grade_rectangle {
664: my ($spec,$x,$y) = @_;
665: &Apache::lonxml::debug("Spec is $spec");
666: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
667: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
668: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
669: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
670: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
671: return 'APPROX_ANS';
672: }
673: return 'INCORRECT';
674: }
675:
676: sub end_rectangle {
677: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
678: my $result;
679: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
680: $target eq 'analyze' || $target eq 'answer') {
681: my $name = $Apache::imageresponse::curname;
682: my $area = &Apache::lonxml::endredirection;
683: $area=~s/\s//g;
684: &Apache::lonxml::debug("out is $area for $name");
685: if ( $Apache::imageresponse::conceptgroup
686: && !&Apache::response::showallfoils()
687: ) {
688: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
689: } else {
690: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
691: }
692: } elsif ($target eq 'edit') {
693: $result=&Apache::edit::end_table();
694: }
695: return $result;
696: }
697:
698: sub start_polygon {
699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
700: my $result='';
701: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
702: $target eq 'analyze' || $target eq 'answer') {
703: &Apache::lonxml::startredirection;
704: } elsif ($target eq 'edit') {
705: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
706: $result=&Apache::edit::tag_start($target,$token,'Polygon').
707: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
708: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
709: &Apache::edit::end_row();
710: } elsif ($target eq "modified") {
711: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
712: }
713: return $result;
714: }
715:
716: sub grade_polygon {
717: my ($spec,$x,$y) = @_;
718: &Apache::lonxml::debug("Spec is $spec");
719: $spec=~s/^polygon://;
720: my @polygon;
721: foreach my $coord (split('-',$spec)) {
722: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
723: &Apache::lonxml::debug("x $x y $y");
724: push @polygon, {'x'=>$x,'y'=>$y};
725: }
726: #make end point start point
727: push @polygon, $polygon[0];
728: # cribbed from
729: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
730: my $crossing = 0; # the crossing number counter
731:
732: # loop through all edges of the polygon
733: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
734: if ((($polygon[$i]->{'y'} <= $y)
735: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
736: ||
737: (($polygon[$i]->{'y'} > $y)
738: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
739: # compute the actual edge-ray intersect x-coordinate
740: my $vt = ($y - $polygon[$i]->{'y'})
741: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
742: if ($x < $polygon[$i]->{'x'} + $vt *
743: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
744: $crossing++; # a valid crossing of y=P.y right of P.x
745: }
746: }
747: }
748:
749: # 0 if even (out), and 1 if odd (in)
750: if ($crossing%2) {
751: return 'APPROX_ANS';
752: } else {
753: return 'INCORRECT';
754: }
755: }
756:
757: sub end_polygon {
758: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
759: my $result;
760: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
761: $target eq 'analyze' || $target eq 'answer') {
762: my $name = $Apache::imageresponse::curname;
763: my $area = &Apache::lonxml::endredirection;
764: $area=~s/\s*//g;
765: &Apache::lonxml::debug("out is $area for $name");
766: if ( $Apache::imageresponse::conceptgroup
767: && !&Apache::response::showallfoils()
768: ) {
769: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
770: } else {
771: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
772: }
773: } elsif ($target eq 'edit') {
774: $result=&Apache::edit::end_table();
775: }
776: return $result;
777: }
778: 1;
779: __END__
780:
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