1: # The LearningOnline Network with CAPA
2: # mutliple choice style responses
3: #
4: # $Id: radiobuttonresponse.pm,v 1.162 2018/12/19 04:07:35 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22: #
23: # /home/httpd/html/adm/gpl.txt
24: #
25: # http://www.lon-capa.org/
26: #
27:
28:
29:
30: package Apache::radiobuttonresponse;
31: use strict;
32: use HTML::Entities();
33: use Apache::lonlocal;
34: use Apache::lonnet;
35: use Apache::response;
36: use Apache::caparesponse;
37:
38: my $default_bubbles_per_line = 10;
39: my @alphabet = ( 'A' .. 'Z' ); # Foil labels.
40:
41:
42:
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
46: }
47:
48: #---------------------------------------------------------------------------
49: #
50: # Generic utility subs.
51:
52: sub bubble_line_count {
53: my ($numfoils, $bubbles_per_line) = @_;
54: my $bubble_lines;
55: $bubble_lines = int($numfoils / $bubbles_per_line);
56: if (($numfoils % $bubbles_per_line) != 0) {
57: $bubble_lines++;
58: }
59: return $bubble_lines;
60:
61: }
62:
63:
64:
65: #------------------------------------------------------------------------------
66: #
67: # XML handlers.
68: sub start_radiobuttonresponse {
69: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
70: my $result;
71:
72: #when in a radiobutton response use these
73: &Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
74: push (@Apache::lonxml::namespace,'radiobuttonresponse');
75: my $id = &Apache::response::start_response($parstack,$safeeval);
76:
77: %Apache::hint::radiobutton=();
78: undef(%Apache::response::foilnames);
79: if ($target eq 'meta') {
80: $result=&Apache::response::meta_package_write('radiobuttonresponse');
81: } elsif ($target eq 'edit' ) {
82: $result.=&Apache::edit::start_table($token)
83: .'<tr><td>'.&Apache::loncommon::insert_folding_button()
84: .&Apache::lonxml::description($token)
85: .&Apache::loncommon::help_open_topic('Radio_Response_Problems')
86: .'</td>'
87: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
88: .&Apache::edit::deletelist($target,$token)
89: .'</span></td>'
90: .'<td> '.&Apache::edit::end_row()
91: .&Apache::edit::start_spanning_row();
92: $result.=
93: &Apache::edit::text_arg('Max Number Of Shown Foils:','max',
94: $token,'4').
95: &Apache::edit::select_arg('Randomize Foil Order:','randomize',
96: ['yes','no'],$token).
97: &Apache::edit::select_arg('Display Direction:','direction',
98: ['vertical','horizontal'],$token).
99: &Apache::edit::end_row().
100: &Apache::edit::start_spanning_row()."\n";
101: } elsif ($target eq 'modified') {
102: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
103: $safeeval,'max',
104: 'randomize','direction');
105: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
106:
107: } elsif ( $target eq 'tex' ) {
108: my $type =
109: &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef,
110: 0 );
111: if ( $type eq '1' ) {
112: $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
113: }
114: elsif ( $type eq 'A' ) {
115: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
116: }
117: elsif ( $type eq 'a' ) {
118: $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
119: }
120: elsif ( $type eq 'i' ) {
121: $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';
122: }
123: else {
124: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
125: }
126:
127: }
128: elsif ( $target eq 'analyze' ) {
129: my $part_id = "$Apache::inputtags::part.$id";
130: $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';
131: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
132: }
133: return $result;
134: }
135:
136: sub end_radiobuttonresponse {
137: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
138: my $result;
139: if ( $target eq 'edit' ) {
140: $result = &Apache::edit::end_table();
141: }
142: &Apache::response::end_response;
143: pop @Apache::lonxml::namespace;
144: &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
145: undef(%Apache::response::foilnames);
146: return $result;
147: }
148:
149: %Apache::response::foilgroup=();
150: sub start_foilgroup {
151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
152: %Apache::response::foilgroup=();
153: $Apache::radiobuttonresponse::conceptgroup=0;
154: &Apache::response::pushrandomnumber(undef,$target);
155: return;
156: }
157:
158: sub storesurvey {
159: my ($style) = @_;
160: if ( !&Apache::response::submitted() ) { return ''; }
161: my $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
162: &Apache::lonxml::debug("Here I am!:$response:");
163: if ( $response !~ /[0-9]+/) { return ''; }
164: my $part = $Apache::inputtags::part;
165: my $id = $Apache::inputtags::response['-1'];
166: my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
167: my %responsehash;
168: $responsehash{$whichfoils[$response]}=$response;
169: my $responsestr=&Apache::lonnet::hash2str(%responsehash);
170: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
171: $responsestr;
172: my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
173: my $ad;
174: if ($style eq 'anonsurvey') {
175: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS';
176: } elsif ($style eq 'anonsurveycred') {
177: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS_CREDIT';
178: } elsif ($style eq 'surveycred') {
179: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED_CREDIT';
180: } else {
181: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
182: }
183: &Apache::response::handle_previous(\%previous,$ad);
184: &Apache::lonxml::debug("submitted a $response<br />\n");
185: return '';
186: }
187:
188:
189: sub grade_response {
190: my ($answer, $whichfoils, $bubbles_per_line)=@_;
191:
192: if ( !&Apache::response::submitted() ) { return; }
193: my $response;
194:
195: if ($env{'form.submitted'} eq 'scantron') {
196: $response = &Apache::response::getresponse(1,undef,
197: &bubble_line_count(scalar(@{ $whichfoils}),
198: $bubbles_per_line),
199: $bubbles_per_line);
200:
201: } else {
202: $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
203: }
204:
205:
206: if ( $response !~ /[0-9]+/) { return; }
207: my $part=$Apache::inputtags::part;
208: my $id = $Apache::inputtags::response['-1'];
209: my %responsehash;
210: $responsehash{$whichfoils->[$response]}=$response;
211: my $responsestr=&Apache::lonnet::hash2str(%responsehash);
212: my %previous=&Apache::response::check_for_previous($responsestr,
213: $part,$id);
214: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
215: $responsestr;
216: &Apache::lonxml::debug("submitted a $response<br />\n");
217: my $ad;
218: if ($response == $answer) {
219: $ad='EXACT_ANS';
220: } else {
221: $ad='INCORRECT';
222: }
223: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
224: &Apache::response::handle_previous(\%previous,$ad);
225: }
226:
227: sub end_foilgroup {
228: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
229:
230: my $result;
231: my $bubble_lines;
232: my $answer_count;
233: my $id = $Apache::inputtags::response['-1'];
234: my $part = $Apache::inputtags::part;
235: my $bubbles_per_line = &getbubblesnum($part,$id);
236:
237:
238: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
239: $target eq 'tex' || $target eq 'analyze') {
240: my $style = $Apache::lonhomework::type;
241: my $direction = &Apache::lonxml::get_param('direction',$parstack,
242: $safeeval,'-2');
243: if ( (($style eq 'survey') || ($style eq 'surveycred') ||
244: ($style eq 'anonsurvey') || ($style eq 'anonsurveycred'))
245: && ($target ne 'analyze')) {
246: if ($target eq 'web' || $target eq 'tex') {
247: $result=&displayallfoils($direction, $target);
248: } elsif ( $target eq 'answer' ) {
249: $result=&displayallanswers();
250: } elsif ( $target eq 'grade' ) {
251: $result=&storesurvey($style);
252: }
253: $answer_count = scalar(@{$Apache::response::foilgroup{'names'}});
254:
255: } else {
256:
257: my $name;
258: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,
259: '-2');
260: my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
261: $safeeval,'-2');
262: my ($answer, @shown) = &whichfoils($max, $randomize);
263: $answer_count = scalar(@shown);
264:
265: if ($target eq 'web' || $target eq 'tex') {
266: $result=&displayfoils($target,
267: $answer, \@shown,
268: $direction,
269: $bubbles_per_line);
270: } elsif ($target eq 'answer' ) {
271: $result=&displayanswers($answer, \@shown, $bubbles_per_line);
272: } elsif ( $target eq 'grade') {
273: &grade_response($answer, \@shown, $bubbles_per_line);
274: } elsif ( $target eq 'analyze') {
275: my $bubble_lines = &bubble_line_count($answer_count,
276: $bubbles_per_line);
277: &Apache::response::analyze_store_foilgroup(\@shown,
278: ['text','value','location']);
279: my $part_id="$part.$id";
280: push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
281: ('true','false'));
282:
283: }
284: }
285: $Apache::lonxml::post_evaluate=0;
286: }
287: if ($target eq 'web') {
288: &Apache::response::setup_prior_tries_hash(\&format_prior_answer,
289: [\%Apache::response::foilgroup]);
290: }
291: &Apache::response::poprandomnumber();
292: $bubble_lines = &bubble_line_count($answer_count, $bubbles_per_line);
293: &Apache::lonxml::increment_counter($bubble_lines,
294: "$part.$id");
295: if ($target eq 'analyze') {
296: &Apache::lonhomework::set_bubble_lines();
297: }
298: return $result;
299: }
300: sub getbubblesnum {
301: my ($part,$id) = @_;
302: my $bubbles_per_line;
303: my $default_numbubbles = $default_bubbles_per_line;
304: if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
305: ($env{'form.bubbles_per_row'} > 0)) {
306: $default_numbubbles = $env{'form.bubbles_per_row'};
307: }
308: $bubbles_per_line =
309: &Apache::response::get_response_param($part."_$id",'numbubbles',
310: $default_numbubbles);
311: return $bubbles_per_line;
312: }
313:
314: sub getfoilcounts {
315: my @names;
316: my $truecnt=0;
317: my $falsecnt=0;
318: my $name;
319: if ( $Apache::response::foilgroup{'names'} ) {
320: @names= @{ $Apache::response::foilgroup{'names'} };
321: }
322: foreach $name (@names) {
323: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
324: $truecnt++;
325: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
326: $falsecnt++;
327: }
328: }
329: return ($truecnt,$falsecnt);
330: }
331:
332: sub format_prior_answer {
333: my ($mode,$answer,$other_data) = @_;
334: my $foil_data = $other_data->[0];
335: my %response = &Apache::lonnet::str2hash($answer);
336: my ($name) = keys(%response);
337: return '<span class="LC_prior_radiobutton">'.
338: $foil_data->{$name.'.text'}.'</span>';
339:
340: }
341:
342:
343: ##
344: # Return the last survey response. The logic is slightly different than that of
345: # get_last_responses. TODO: See if there are chunks of code betweenthis and
346: # get_last_reponses that are common and can be factored.
347: #
348: # @param $part - Problem part under consideration.
349: # @param $showanswer - True if answers should be shown.
350: # @param $id - Problem id.
351: #
352: # @return hash reference.
353: # @retval reference to the has indexed by answer selection that
354: # indicates the most recent answer.
355: #
356: sub get_last_survey_response {
357: my ($part, $showanswer, $id) = @_;
358:
359: my $newvariation;
360: my $lastresponse; # stringified last response.
361:
362: if (
363: (
364: (
365: $Apache::lonhomework::history{"resource.$part.type"} eq
366: 'randomizetry'
367: )
368: || ( $Apache::lonhomework::type eq 'randomizetry' )
369: )
370: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
371: )
372: {
373: if ( $env{ 'form.' . $part . '.rndseed' } ne
374: $Apache::lonhomework::history{"resource.$part.rndseed"} )
375: {
376: $newvariation = 1;
377: }
378: }
379: $showanswer = &Apache::response::show_answer();
380: unless ($newvariation && !$showanswer) {
381: if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
382: (($env{'form.grade_username'} eq $env{'user.name'}) &&
383: ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
384: $lastresponse = $Apache::lonhomework::history{"resource.$part.$id.submission"};
385: } else {
386: unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
387: ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
388: $lastresponse = $Apache::lonhomework::history{"resource.$part.$id.submission"};
389: }
390: }
391: }
392: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
393:
394: return \%lastresponse;
395:
396: }
397: ##
398: # Removes the names from a foil group that are marked as unused.
399: #
400: # @param $names - reference to the array of names to filter.
401: #
402: # @return arrayref
403: # @retval reference to the filtered array.
404: #
405: sub remove_unused {
406: my ($names) = @_;
407: my @result;
408:
409: foreach my $name (@{$names}) {
410: if ($Apache::response::foilgroup{$name . '.value'} ne 'unused') {
411: push(@result, $name);
412: }
413: }
414: return \@result;
415: }
416: ##
417: # Displays all foils in a survey type problem for HTML rendition.
418: # TODO: See if there is any logic in this sub that can be shared
419: # with display_foils_html
420: #
421: # @param $names - ref to array of names of the foils to display.
422: # @param $part - Problem part number.
423: # @param $showanswer - If true, show the answers.
424: # @param $lastresponse - Ref to the last response hash.
425: # @param $direction - Display direction of the radiobuttons.
426: #
427: # @return string
428: # @retval HTML required to display the resource in a browser.
429: #
430: sub display_survey_html {
431: my ($names, $part, $showanswer, $lastresponse, $direction) = @_;
432: my $result;
433:
434: # Figure out a few fragments of html that depend onthe
435: # orientation of the radiobuttons:
436: # closing_html - HTML to emit at the end of the resource.
437: # pre_foil - HTML to emit prior to each foil.
438: # post_foil - HTML to emit following each foil.
439: #
440: # The opening HTML is just added to the $result now
441: #
442: # Figuring these outin advance compresses the loop over foils into something
443: # pretty simple:
444: #
445: # NOTE: There's probably a really cool way to do this with style sheets
446: # and picking the selector based on the orientation, if someone wants to puzzle
447: # that out. In that case, probably the whole thing lives in a <div> and each
448: # foil lives in a <p>
449: #
450:
451:
452: my ($opening_html, $closing_html, $pre_foil, $post_foil) =
453: &html_direction_fragments($direction);
454:
455: $result = $opening_html;
456:
457: # Different rendering depending on whether answers are shown:
458: # I played with different factorings but this seems the most concise/clear...
459: # although I don't like the $showanswer conditino inside the loop. Other things I tried
460: # - two loops..much longer code..no gain in clarity.
461: # - Using a visitor patttern passing it the rendering code chunklets and
462: # an anonymous hash reference for state data etc. Very cool but
463: # quite a bit more code and quite a bit less clear.
464:
465: my $temp = 0;
466: foreach my $name (@{$names}) {
467: $result .= $pre_foil;
468:
469: if ($showanswer) {
470: my $foiltext = $Apache::response::foilgroup{$name . '.text'};
471:
472: # Bold the prior response:
473:
474: if (defined($lastresponse->{$name})) {
475: $result .= '<b>' . $foiltext . '</b>';
476: } else {
477: $result .= $foiltext;
478: }
479: } else {
480: $result .= &html_radiobutton(
481: $part, $Apache::inputtags::response['-1'], $name, $lastresponse, $temp
482: );
483: }
484:
485: $result .= $post_foil;
486: $temp++;
487: }
488:
489:
490: $result .= $closing_html;
491: return $result;
492:
493: }
494:
495: ##
496: # Generate LaTeX for surveys.
497: #
498: # @param $names - names of the foils to display.
499: # @param $showanswer - flag that is true to display answers.
500: # @param $lastresponse - Reference to a hash the indicates the last response.
501: # @param $direction - Orientation of foils ('horiztonal' or otherwise).
502: # @param $venv - LaTeX name for vertical env.
503: #
504: # @return string
505: # @retval LaTeX rendering of the survey question.
506:
507: sub latex_survey {
508: my ($names, $showanswer, $lastresponse, $direction, $venv) = @_;
509:
510: my $result;
511: if ($showanswer) {
512: $result .= "\\begin{$venv}";
513: foreach my $name (@{$names}) {
514:
515:
516: $result .= '\item \vskip -2mm ';
517:
518: if ( defined( $lastresponse->{$name} ) ) {
519: $result .= '}';
520: }
521: $result .= $Apache::response::foilgroup{ $name . '.text' } . ' ';
522: }
523: $result .= "\\end{$venv}";
524:
525: } elsif ( $env{'form.pdfFormFields'} eq 'yes'
526: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
527: $result .= &display_pdf_form($names, $direction, $venv);
528: } else {
529: if ($direction eq 'horizontal') {
530: my @foil_texts = &get_foil_texts($names);
531: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
532: $names, \@foil_texts, '$\bigcirc$');
533: } else {
534: $result .= "\\begin{$venv}";
535:
536: my $temp = 0;
537: my $i = 0;
538: foreach my $name (@{$names}) {
539:
540: $result .= '\item \vskip -2mm ';
541:
542: if ($env{'form.pdfFormFields'} ne 'yes'
543: or $Apache::inputtags::status[-1] ne 'CAN_ANSWER' )
544: {
545: $result .=
546: '$\bigcirc$'
547: . $Apache::response::foilgroup{ $name . '.text' }
548: . '\\\\'; #' stupid emacs
549: }
550:
551: $i++;
552: $temp++;
553:
554: $result .= '\vskip 0 mm ';
555: }
556: $result .= "\\end{$venv}";
557: }
558: }
559: return $result;
560: }
561: ##
562: # Figure out the LaTeX environment in which to wrap the LaTeX vertical output.
563: #
564: # @return string
565: # @retval the environment name. The LaTeX should be wrapped a
566: # \begin{retval} \end{retval} pair.
567: #
568: sub latex_vertical_environment {
569: if ($env{'form.pdfFormFields'} eq 'yes'
570: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
571: return 'itemize';
572: } else {
573: return 'enumerate';
574: }
575: }
576:
577: ##
578: # Figure out the key html fragments that depend on the rendering direction:
579: #
580: # @param $direction - 'horizontal' for horizontal direction.
581: #
582: # @return list
583: # @retval (part_start, part_end, foil_start, foil_end)
584: # Where:
585: # - part_start is the HTML to emit at the start of the part.
586: # - part_end is the HTML to emit at the end of the part.
587: # - foil_start is the HTML to emit prior to each foil.
588: # - foil_end is the HTML to emit after each foil
589: #
590: sub html_direction_fragments {
591: my $direction = shift;
592: if ($direction eq 'horizontal') {
593: return ('<table><tr>', '</tr></table>', '<td>', '</td>');
594: } else {
595: return ('', '', '<div class="LC_radiofoil">', '</div>');
596: }
597: }
598:
599: ##
600: #
601: # Displays all the foils of a problem in a format suitable for
602: # surveys, surveys for credit, anonymous surveys and anonymous surveys for credit.
603: #
604: # @param $direction - Display direction of the choices ('horiztonal' or not).
605: # @param $target - Rendering target.
606: #
607: # @return string
608: # @retval Text that renders for the selected target.
609: #
610: sub displayallfoils{
611: my ( $direction, $target ) = @_;
612: my $result;
613: &Apache::lonxml::debug("survey style display");
614:
615: my @names;
616:
617: if ( $Apache::response::foilgroup{'names'} ) {
618: @names = @{ $Apache::response::foilgroup{'names'} };
619: }
620:
621:
622: my $id = $Apache::inputtags::response['-1'];
623: my $part = $Apache::inputtags::part;
624:
625: my $showanswer = &Apache::response::show_answer();
626: my $lastresponse = &get_last_survey_response($part, $showanswer, $id);
627: my $used_names = &remove_unused(\@names);
628:
629:
630: if ($target ne 'tex') {
631: $result .= &display_survey_html(
632: $used_names, $part, $showanswer, $lastresponse, $direction
633: );
634: } else {
635:
636: my $vertical_env = &latex_vertical_environment();
637: $result .= &latex_survey(
638: $used_names, $showanswer, $lastresponse, $direction, $vertical_env
639: );
640:
641: }
642: return $result;
643: }
644:
645: sub whichfoils {
646: my ($max,$randomize)=@_;
647:
648: my @truelist;
649: my @falselist;
650: my @whichfalse =();
651: my ($truecnt,$falsecnt) = &getfoilcounts();
652: my $count=0;
653: # we will add in 1 of the true statements
654: if ( $max>0 && ($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; $max=$count; }
655: my $answer=int(&Math::Random::random_uniform() * ($count));
656: &Apache::lonxml::debug("Count is $count, $answer is $answer");
657: my @names;
658: if ( $Apache::response::foilgroup{'names'} ) {
659: @names= @{ $Apache::response::foilgroup{'names'} };
660: }
661: if (&Apache::response::showallfoils()) {
662: @whichfalse=@names;
663: } elsif ($randomize eq 'no') {
664: &Apache::lonxml::debug("No randomization");
665: my $havetrue=0;
666: foreach my $name (@names) {
667: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
668: if (!$havetrue ) {
669: push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;
670: }
671: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
672: push (@whichfalse,$name);
673: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
674: } else {
675: &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
676: }
677: }
678: if ((!$havetrue) &&
679: ($Apache::lonhomework::type ne 'survey') &&
680: ($Apache::lonhomework::type ne 'surveycred') &&
681: ($Apache::lonhomework::type ne 'anonsurvey') &&
682: ($Apache::lonhomework::type ne 'anonsurveycred')) {
683: &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
684: }
685: } else {
686: my $current=0;
687: &Apache::lonhomework::showhash(%Apache::response::foilgroup);
688: my (%top,%bottom);
689: #first find out where everyone wants to be
690: foreach my $name (@names) {
691: $current++;
692: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
693: push (@truelist,$name);
694: if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
695: $top{$name}=$current;
696: } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
697: $bottom{$name}=$current;
698: }
699: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
700: push (@falselist,$name);
701: if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
702: $top{$name}=$current;
703: } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
704: $bottom{$name}=$current;
705: }
706: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
707: } else {
708: &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
709: }
710: }
711: #pick a true statement
712: my $notrue=0;
713: if (scalar(@truelist) == 0) { $notrue=1; }
714: my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));
715: &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
716: my (@toplist, @bottomlist);
717: my $topcount=0;
718: my $bottomcount=0;
719: # assign everyone to either toplist/bottomlist or whichfalse
720: # which false is randomized, toplist bottomlist are in order
721: while ((($#whichfalse+$topcount+$bottomcount) < $max-2) && ($#falselist > -1)) {
722: &Apache::lonxml::debug("Have $#whichfalse max is $max");
723: my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));
724: &Apache::lonxml::debug("From $#falselist elms, picking $afalse");
725: $afalse=splice(@falselist,$afalse,1);
726: &Apache::lonxml::debug("Picked $afalse");
727: &Apache::lonhomework::showhash(('names'=>\@names));
728: &Apache::lonhomework::showhash(%top);
729: if ($top{$afalse}) {
730: $toplist[$top{$afalse}]=$afalse;
731: $topcount++;
732: } elsif ($bottom{$afalse}) {
733: $bottomlist[$bottom{$afalse}]=$afalse;
734: $bottomcount++;
735: } else {
736: push (@whichfalse,$afalse);
737: }
738: }
739: &Apache::lonxml::debug("Answer wants $answer");
740: my $truename=$truelist[$whichtrue];
741: my $dosplice=1;
742: if (($notrue) &&
743: ($Apache::lonhomework::type ne 'survey') &&
744: ($Apache::lonhomework::type ne 'surveycred') &&
745: ($Apache::lonhomework::type ne 'anonsurvey') &&
746: ($Apache::lonhomework::type ne 'anonsurveycred')) {
747: $dosplice=0;
748: &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
749: }
750: #insert the true statement, keeping track of where it wants to be
751: if ($Apache::response::foilgroup{$truename.'.location'} eq 'top' && $dosplice) {
752: $toplist[$top{$truename}]=$truename;
753: $answer=-1;
754: foreach my $top (reverse(@toplist)) {
755: if ($top) { $answer++;}
756: if ($top eq $truename) { last; }
757: }
758: $dosplice=0;
759: } elsif ($Apache::response::foilgroup{$truename.'.location'} eq 'bottom' && $dosplice) {
760: $bottomlist[$bottom{$truename}]=$truename;
761: $answer=-1;
762: foreach my $bot (@bottomlist) {
763: if ($bot) { $answer++;}
764: if ($bot eq $truename) { last; }
765: }
766: $answer+=$topcount+$#whichfalse+1;
767: $dosplice=0;
768: } else {
769: if ($topcount>0 || $bottomcount>0) {
770: my $inc = 1;
771: if (($bottomcount > 0) && ($Apache::lonhomework::type ne 'exam')) {
772: $inc = 2;
773: }
774: $answer=int(&Math::Random::random_uniform() * ($#whichfalse+$inc))
775: + $topcount;
776: }
777: }
778: &Apache::lonxml::debug("Answer now wants $answer");
779: #add the top items to the top, bottom items to the bottom
780: for (my $i=0;$i<=$#toplist;$i++) {
781: if ($toplist[$i]) { unshift(@whichfalse,$toplist[$i]) }
782: }
783: for (my $i=0;$i<=$#bottomlist;$i++) {
784: if ($bottomlist[$i]) { push(@whichfalse,$bottomlist[$i]) }
785: }
786: #if the true statement is randomized insert it into the list
787: if ($dosplice) { splice(@whichfalse,$answer,0,$truelist[$whichtrue]); }
788: }
789: &Apache::lonxml::debug("Answer is $answer");
790: return ($answer,@whichfalse);
791: }
792:
793: ##
794: # Return a list of foil texts given foil names.
795: #
796: # @param $whichfoils - Reference to a list of foil names.
797: #
798: # @return array
799: # @retval foil texts
800: #
801: sub get_foil_texts {
802: my ($whichfoils) = @_;
803: my @foil_texts;
804:
805: foreach my $name (@{$whichfoils}) {
806: push(@foil_texts, $Apache::response::foilgroup{$name . '.text'});
807: }
808: return @foil_texts;
809: }
810:
811: ##
812: # Generate the HTML for a single html foil.
813: # @param $part - The part for which the response is being generated.
814: # @param $fieldname - The basename of the radiobutton field
815: # @param $name - The foilname.
816: # @param $last_responses - Reference to a hash that holds the most recent
817: # responses.
818: # @param $value - radiobutton value.
819: #
820: # @return text
821: # @retval The generated html.
822: #
823: sub html_radiobutton {
824: my ($part, $fieldname, $name, $last_responses, $value) = @_;
825:
826: my $result='<label>';
827:
828: $result .= '<input type="radio" '
829: . 'onchange="javascript:setSubmittedPart(' . "'$part');\" "
830: . 'name="HWVAL_' . $fieldname . '" '
831: . 'value="'.$value.'"';
832:
833: if (defined($last_responses->{$name})) {
834: $result .= ' checked="checked" ';
835: }
836: $result .= ' />';
837: $result .= $Apache::response::foilgroup{$name . '.text'};
838: $result .= '</label>';
839:
840: return $result;
841:
842: }
843: ##
844: # Return a reference to the last response hash. This hash has exactly
845: # one or zero entries. The one entry is keyed by the foil 'name' of
846: # the prior response
847: #
848: # @param $part - Number of the problem part.
849: #
850: # @return reference to a hash.
851: # @retval see above.
852: #
853: sub get_last_response {
854: my ($part) = @_;
855:
856: my $id = $Apache::inputtags::response['-1'];
857: my ( $lastresponse, $newvariation );
858:
859: if ((( $Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry')
860: || ( $Apache::lonhomework::type eq 'randomizetry' )
861: )
862: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
863: )
864: {
865:
866: if ( $env{ 'form.' . $part . '.rndseed' } ne
867: $Apache::lonhomework::history{"resource.$part.rndseed"} )
868: {
869: $newvariation = 1;
870: }
871: }
872: unless ($newvariation) {
873: if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
874: (($env{'form.grade_username'} eq $env{'user.name'}) &&
875: ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
876: $lastresponse =
877: $Apache::lonhomework::history{"resource.$part.$id.submission"};
878: } else {
879: unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
880: ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
881: $lastresponse =
882: $Apache::lonhomework::history{"resource.$part.$id.submission"};
883:
884: }
885: }
886: }
887:
888: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
889:
890: return \%lastresponse;
891: }
892:
893: ##
894: # Display foils in html rendition.:
895: #
896: # @param $whichfoils - Set of foils to display.
897: # @param $target - Rendition target...there are several html targets.
898: # @param $direction - 'horizontal' if layout is horizontal.
899: # @param $part - Part of the problem that's being displayed.
900: # @param $show_answer- True if answers should be shown.
901: #
902: # @return string
903: # @retval generated html.
904: #
905: sub display_foils_html {
906: my ($whichfoils, $target, $direction, $part, $show_answer) = @_;
907: my $result;
908:
909:
910: # if the answers get shown, we need to label each item as correct or
911: # incorrect.
912:
913: my ($opening_html, $finalclose, $item_pretext, $item_posttext) =
914: &html_direction_fragments($direction);
915:
916: $result .= $opening_html;
917:
918:
919: if ($show_answer) {
920:
921: foreach my $name (@{$whichfoils}) {
922:
923: # If the item gets further surrounded by tags, this
924: # holds the closures for those tages.
925:
926: my $item_closetag = '';
927:
928: $result .= $item_pretext;
929:
930: # Label each foil as correct or incorrect:
931:
932: if ($Apache::response::foilgroup{$name . '.value'} eq 'true') {
933: $result .= &mt('Correct:') . '<b>';
934: $item_closetag .= '</b>';
935:
936: } else {
937: $result .= &mt('Incorrect');
938: }
939:
940: # Web rendition encloses the
941: # item text in a label tag as well:
942:
943: if ($target eq 'web') {
944: $result .= '<label>';
945: $item_closetag = '</label>' . $item_closetag;
946: }
947: $result .= $Apache::response::foilgroup{$name . '.text'};
948: $result .= $item_closetag;
949: $result .= $item_posttext;
950: $result .= "\n"; # make the html a bit more readable.
951: }
952:
953:
954: } else {
955: my $lastresponse = &get_last_response($part);
956:
957: my $item_no = 0;
958: foreach my $name (@{$whichfoils}) {
959: $result .= $item_pretext;
960: $result .= &html_radiobutton(
961: $part, $Apache::inputtags::response[-1],
962: $name, $lastresponse, $item_no
963: );
964: $result .= $item_posttext;
965: $item_no++;
966: }
967:
968: }
969: $result .= $finalclose;
970:
971: return $result;
972: }
973: ##
974: # Display foils in exam mode for latex
975: #
976: # @param $whichfoils - Reference to an array that contains the foil names to display
977: # @param $bubbles_per_line - Number of bubbles on a line.
978: # @param $direction - Rendering direction 'horizontal' is what we're looking for.
979: # @param $venv - Name of LaTeX environment to use for vertical rendering.
980: #
981: # @return string
982: # @return the latex rendering of the exam problem.
983: #
984: #
985: sub display_latex_exam {
986: my ($whichfoils, $bubbles_per_line, $direction, $venv) = @_;
987: my $result;
988: my $numlines;
989: my $bubble_number = 0;
990: my $line = 0;
991: my $i = 0;
992:
993:
994: if ($direction eq 'horizontal') {
995:
996: # Marshall the display text for each foil and turn things over to
997: # Apache::response::make_horizontal_bubbles:
998:
999: my @foil_texts = &get_foil_texts($whichfoils);
1000: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
1001: $whichfoils, \@foil_texts, '$\bigcirc$');
1002:
1003: } else {
1004:
1005: $result .= '\vskip 2mm \noindent';
1006:
1007: # This section puts out the prefix that tells the user
1008: # (if necessary) to only choose one bubble in the next n lines
1009: # for problems with more than one line worth of bubbles in the grid sheet:
1010:
1011: my $numitems = scalar( @{$whichfoils} );
1012: $numlines = int( $numitems / $bubbles_per_line );
1013: if ( ( $numitems % $bubbles_per_line ) != 0 ) {
1014: $numlines++;
1015: }
1016: if ( $numlines < 1 ) {
1017: $numlines = 1;
1018: }
1019: if ( $numlines > 1 ) {
1020: my $linetext;
1021: for ( my $i = 0 ; $i < $numlines ; $i++ ) {
1022: $linetext .= $Apache::lonxml::counter + $i . ', ';
1023: }
1024: $linetext =~ s/,\s$//;
1025: $result .=
1026: '\small {\textbf{'
1027: . $linetext . '}} '
1028: . ' {\footnotesize '
1029: . &mt( '(Bubble once in [_1] lines)', $numlines )
1030: . '} \hspace*{\fill} \\\\';
1031: }
1032: else {
1033: $result .= '\textbf{' . $Apache::lonxml::counter . '}.'.
1034: '\hspace*{2 mm}';
1035: }
1036:
1037: # Now output the bubbles themselves:
1038:
1039: foreach my $name (@{$whichfoils}) {
1040: if ( $bubble_number >= $bubbles_per_line ) {
1041: $line++;
1042: $i = 0;
1043: $bubble_number = 0;
1044: }
1045: my $identifier;
1046: if ( $numlines > 1 ) {
1047: $identifier = $Apache::lonxml::counter + $line;
1048: }
1049: my $preindent;
1050: if ($bubble_number > 0) {
1051: my $offset = 5;
1052: if ($Apache::lonxml::counter) {
1053: if ($identifier) {
1054: $offset += 2 * (length($identifier)-1);
1055: } else {
1056: $offset += 2 * (length($Apache::lonxml::counter)-1);
1057: }
1058: }
1059: $preindent = '\hspace*{'.$offset.' mm}';
1060: }
1061: my $foiltext = $Apache::response::foilgroup{$name . '.text'};
1062: $foiltext =~ s/\\noindent//; # forgive me for I have sinned..
1063: $result .= '{\small \textbf{'
1064: . $identifier .$preindent
1065: . $alphabet[$i]
1066: . '}}$\bigcirc$'
1067: . $foiltext
1068: . '\\\\'; #' stupid emacs -- it thinks it needs that apostrophe to close the quote
1069:
1070: $i++;
1071: $bubble_number++;
1072: }
1073:
1074: }
1075:
1076: return $result;
1077:
1078: }
1079:
1080: ##
1081: # Display latex when exam mode is not on.
1082: #
1083: # @param $whichfoils - The foils to display
1084: # @param $direction - Display direction ('horizontal' is what matters to us).
1085: # @param $venv - Vertical env. to use for vertical rendering.
1086: # @param $vend - End the vertical environment being used.
1087: #
1088: # @return string
1089: # @retval - The LaTeX rendering of the resource.'
1090: #
1091: sub display_latex {
1092: my ($whichfoils, $direction, $venv) = @_;
1093: my $result;
1094:
1095: # how we render depends on the direction.
1096: # Vertical is some kind of list environment determined by vbegin/vend.
1097: # Horizontal is a table that is generated by
1098: # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string
1099: # for the actual bubble text.
1100:
1101: if ($direction eq 'horizontal') {
1102: my @foil_texts = &get_foil_texts($whichfoils);
1103: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
1104: $whichfoils, \@foil_texts, '');
1105: } else {
1106: $result .= "\\begin{$venv}";
1107: foreach my $name (@{$whichfoils}) {
1108: $result .= '\vspace*{-2 mm}\item '
1109: . $Apache::response::foilgroup{ $name . '.text' };
1110: }
1111:
1112: $result .= "\\end{$venv}";
1113: }
1114: return $result;
1115: }
1116:
1117:
1118: ##
1119: # Render foils for a PDF form. This is a variant of tex rednering that provides
1120: # sufficient markup that the final PDF is a form that can be filled in online,
1121: # or offline.
1122: #
1123: # @param $whichfoils - References an array of foils to display in the order in which
1124: # they should be displayed.
1125: # @param $direction - Rendering direction. 'horiztonal' means inputs are laid out
1126: # horizontally otherwise they are stacked vertically.
1127: # @param $venv - Vertical environment in which to wrap the foils.
1128: #
1129: # @return string
1130: # @retval String containing the rendering of the resource.
1131: #
1132: # TODO: Take into account direction!!!
1133: #
1134: sub display_pdf_form {
1135: my ($whichfoils, $direction, $venv) = @_;
1136: my $temp = 0;
1137: my $result;
1138:
1139: $result .= "\\begin{$venv}";
1140: foreach my $name ( @{$whichfoils} ) {
1141:
1142: my $fieldname =
1143: $env{'request.symb'}
1144: . '&part_'
1145: . $Apache::inputtags::part
1146: . '&radiobuttonresponse'
1147: . '&HWVAL_'
1148: . $Apache::inputtags::response['-1'];
1149: $result .= '\item[{'
1150: . &Apache::lonxml::print_pdf_radiobutton( $fieldname,
1151: $temp )
1152: . '}]'
1153: . $Apache::response::foilgroup{ $name . '.text' }
1154: . "\n";
1155:
1156: $temp++;
1157: }
1158: $result .= "\\end{$venv}";
1159:
1160: return $result;
1161: }
1162:
1163:
1164: ##
1165: # Display selected foils: This is really just a dispatchter to appropriate renderers
1166: #
1167: # @param $target - Target (e.g. 'tex'...).
1168: # @param $answer - True if answers should be shown.
1169: # @param $whichfoils - Array of foil selectors that indicate which foils shouild be
1170: # rendered, in rendering order.
1171: # @param $direction- Rendering direction ('horizontal' is the one we look for,
1172: # otherwise foils are rendered one per line vertically.
1173: # @param $bubbles_per_line - number of exam bubbles per line.
1174: #
1175: # @return string
1176: # @retval The rendered problem.
1177:
1178: sub displayfoils {
1179: my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_;
1180: my $result;
1181:
1182:
1183: my $part = $Apache::inputtags::part;
1184: my $solved = $Apache::lonhomework::history{"resource.$part.solved"};
1185:
1186: # Show answers html.
1187:
1188: if ( ( $target ne 'tex' )
1189: && &Apache::response::show_answer() )
1190: {
1191:
1192: $result = &display_foils_html(
1193: $whichfoils, $target, $direction, $part, 1);
1194:
1195: # other html
1196: } elsif ($target ne 'tex') {
1197: $result = &display_foils_html($whichfoils, $target, $direction, $part,
1198: 0, 0);
1199:
1200: # LaTeX rendering:
1201: } else {
1202:
1203:
1204: my $id = $Apache::inputtags::response['-1'];
1205: my $part = $Apache::inputtags::part;
1206: my $numlines;
1207:
1208: # Decide how to bracket the list of foils:
1209:
1210: my $vertical_env = &latex_vertical_environment();
1211:
1212: # Rendering for latex exams.
1213:
1214: if ( ( $Apache::lonhomework::type eq 'exam' ) )
1215: {
1216: $result .= &display_latex_exam(
1217: $whichfoils, $bubbles_per_line, $direction, $vertical_env);
1218:
1219: $result .= '\vskip 0mm ';
1220:
1221: } else {
1222:
1223: # Different rendering for PDF form than for a
1224: # 'regular' answer direction is honored in both of those
1225: #
1226:
1227: if ( ($env{'form.pdfFormFields'} eq 'yes')
1228: && ($Apache::inputtags::status[-1] eq 'CAN_ANSWER'))
1229: {
1230: $result .= &display_pdf_form($whichfoils, $direction, $vertical_env);
1231: } else {
1232: $result .= &display_latex($whichfoils, $direction, $vertical_env );
1233: }
1234: $result .= '\vskip 0 mm ';
1235:
1236: }
1237: }
1238: return $result;
1239: }
1240:
1241: sub displayallanswers {
1242: my @names;
1243: if ( $Apache::response::foilgroup{'names'} ) {
1244: @names= @{ $Apache::response::foilgroup{'names'} };
1245: }
1246: my $result=&Apache::response::answer_header('radiobuttonresponse');
1247: foreach my $name (@names) {
1248: $result.=&Apache::response::answer_part('radiobuttonresponse',
1249: $Apache::response::foilgroup{$name.'.value'});
1250: }
1251: $result.=&Apache::response::answer_footer('radiobuttonresponse');
1252: return $result;
1253: }
1254:
1255: sub displayanswers {
1256: my ($answer, $whichopt, $bubbles_per_line)=@_;
1257: my $result;
1258:
1259: if ($Apache::lonhomework::type eq 'exam') {
1260: my $line = int($answer/$bubbles_per_line);
1261: my $correct = ('A'..'Z')[$answer%$bubbles_per_line];
1262: $result .= &Apache::response::answer_header('radiobuttonresponse',
1263: $line);
1264: $result .= &Apache::response::answer_part('radiobuttonresponse',
1265: $correct);
1266: } else {
1267: $result .= &Apache::response::answer_header('radiobuttonresponse');
1268: }
1269: foreach my $name (@{ $whichopt }) {
1270: $result.=&Apache::response::answer_part('radiobuttonresponse',
1271: $Apache::response::foilgroup{$name.'.value'});
1272: }
1273: $result.=&Apache::response::answer_footer('radiobuttonresponse');
1274: return $result;
1275: }
1276:
1277: sub start_conceptgroup {
1278: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1279: $Apache::radiobuttonresponse::conceptgroup=1;
1280: %Apache::response::conceptgroup=();
1281: my $result;
1282: if ($target eq 'edit') {
1283: $result.=&Apache::edit::tag_start($target,$token);
1284: $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
1285: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1286: } elsif ($target eq 'modified') {
1287: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1288: $safeeval,'concept');
1289: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1290: }
1291: return $result;
1292: }
1293:
1294: sub end_conceptgroup {
1295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1296: $Apache::radiobuttonresponse::conceptgroup=0;
1297: my $result;
1298: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1299: $target eq 'tex' || $target eq 'analyze') {
1300: &Apache::response::pick_foil_for_concept($target,
1301: ['value','text','location'],
1302: \%Apache::hint::radiobutton,
1303: $parstack,$safeeval);
1304: } elsif ($target eq 'edit') {
1305: $result=&Apache::edit::end_table();
1306: }
1307: return $result;
1308: }
1309:
1310: sub insert_conceptgroup {
1311: my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
1312: return $result;
1313: }
1314:
1315: sub start_foil {
1316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1317: my $result='';
1318: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1319: &Apache::lonxml::startredirection;
1320: if ($target eq 'analyze') {
1321: &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
1322: }
1323: } elsif ($target eq 'edit') {
1324: $result=&Apache::edit::tag_start($target,$token);
1325: $result.=&Apache::edit::text_arg('Name:','name',$token);
1326: $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',
1327: ['unused','true','false'],
1328: $token);
1329: my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
1330: $safeeval,'-3');
1331: if ($randomize ne 'no') {
1332: $result.=&Apache::edit::select_arg('Location:','location',
1333: ['random','top','bottom'],$token);
1334: }
1335: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1336: } elsif ($target eq 'modified') {
1337: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1338: $safeeval,'value','name',
1339: 'location');
1340: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1341: }
1342: return $result;
1343: }
1344:
1345: sub end_foil {
1346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1347: my $text='';
1348: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1349: $text=&Apache::lonxml::endredirection;
1350: }
1351: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
1352: || $target eq 'tex' || $target eq 'analyze') {
1353: my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
1354: if ($value ne 'unused') {
1355: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
1356: if ($name eq "") {
1357: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
1358: $name=$Apache::lonxml::curdepth;
1359: }
1360: if (defined($Apache::response::foilnames{$name})) {
1361: &Apache::lonxml::error(&mt('Foil name [_1] appears more than once. Foil names need to be unique.','<b><tt>'.$name.'</tt></b>'));
1362: }
1363: $Apache::response::foilnames{$name}++;
1364: my $location =&Apache::lonxml::get_param('location',$parstack,
1365: $safeeval);
1366: if ( $Apache::radiobuttonresponse::conceptgroup
1367: && !&Apache::response::showallfoils() ) {
1368: push @{ $Apache::response::conceptgroup{'names'} }, $name;
1369: $Apache::response::conceptgroup{"$name.value"} = $value;
1370: $Apache::response::conceptgroup{"$name.text"} = $text;
1371: $Apache::response::conceptgroup{"$name.location"} = $location;
1372: } else {
1373: push @{ $Apache::response::foilgroup{'names'} }, $name;
1374: $Apache::response::foilgroup{"$name.value"} = $value;
1375: $Apache::response::foilgroup{"$name.text"} = $text;
1376: $Apache::response::foilgroup{"$name.location"} = $location;
1377: }
1378: }
1379: }
1380: return '';
1381: }
1382:
1383: sub insert_foil {
1384: return '
1385: <foil name="" value="unused">
1386: <startouttext />
1387: <endouttext />
1388: </foil>';
1389: }
1390:
1391: 1;
1392: __END__
1393:
1394:
1395:
1396: =head1 NAME
1397:
1398: Apache::radiobuttonresponse
1399:
1400: =head1 SYNOPSIS
1401:
1402: Handles multiple-choice style responses.
1403:
1404: This is part of the LearningOnline Network with CAPA project
1405: described at http://www.lon-capa.org.
1406:
1407: =head1 SUBROUTINES
1408:
1409: =over
1410:
1411: =item start_radiobuttonresponse()
1412:
1413: =item bubble_line_count()
1414:
1415: =item end_radiobuttonresponse()
1416:
1417: =item start_foilgroup()
1418:
1419: =item storesurvey()
1420:
1421: =item grade_response()
1422:
1423: =item end_foilgroup()
1424:
1425: =item getfoilcounts()
1426:
1427: =item format_prior_answer()
1428:
1429: =item displayallfoils()
1430:
1431: =item &whichfoils($max,$randomize)
1432:
1433: Randomizes the list of foils.
1434: Respects
1435: - each foils desire to be randomized
1436: - the existance of Concept groups of foils (select 1 foil from each)
1437: - and selects a single correct statement from all possilble true statments
1438: - and limits it to a toal of $max foils
1439:
1440: WARNING: this routine uses the random number generator, it should only
1441: be called once per target, otherwise it can cause randomness changes in
1442: homework problems.
1443:
1444: Arguments
1445: $max - maximum number of foils to select (including the true one)
1446: (so a max of 5 is: 1 true, 4 false)
1447:
1448: $randomize - whether to randomize the listing of foils, by default
1449: will randomize, only if randomize is 'no' will it not
1450:
1451: Returns
1452: $answer - location in the array of the correct answer
1453: @foils - array of foil names in to display order
1454:
1455: =item displayfoils()
1456:
1457: =item displayallanswers()
1458:
1459: =item displayanswers()
1460:
1461: =item start_conceptgroup()
1462:
1463: =item end_conceptgroup()
1464:
1465: =item insert_conceptgroup()
1466:
1467: =item start_foil()
1468:
1469: =item end_foil()
1470:
1471: =item insert_foil()
1472:
1473: =back
1474:
1475: =cut
1476:
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