1: # The LearningOnline Network with CAPA
2: # mutliple choice style responses
3: #
4: # $Id: radiobuttonresponse.pm,v 1.156 2013/04/25 17:58:32 bisitz 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::lonxml::description($token)
84: .&Apache::loncommon::help_open_topic('Radio_Response_Problems')
85: .'</td>'
86: .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
87: .&Apache::edit::deletelist($target,$token)
88: .'</span></td>'
89: .'<td> '.&Apache::edit::end_row()
90: .&Apache::edit::start_spanning_row();
91: $result.=
92: &Apache::edit::text_arg('Max Number Of Shown Foils:','max',
93: $token,'4').
94: &Apache::edit::select_arg('Randomize Foil Order:','randomize',
95: ['yes','no'],$token).
96: &Apache::edit::select_arg('Display Direction:','direction',
97: ['vertical','horizontal'],$token).
98: &Apache::edit::end_row().
99: &Apache::edit::start_spanning_row()."\n";
100: } elsif ($target eq 'modified') {
101: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
102: $safeeval,'max',
103: 'randomize','direction');
104: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
105:
106: } elsif ( $target eq 'tex' ) {
107: my $type =
108: &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef,
109: 0 );
110: if ( $type eq '1' ) {
111: $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
112: }
113: elsif ( $type eq 'A' ) {
114: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
115: }
116: elsif ( $type eq 'a' ) {
117: $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
118: }
119: elsif ( $type eq 'i' ) {
120: $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';
121: }
122: else {
123: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
124: }
125:
126: }
127: elsif ( $target eq 'analyze' ) {
128: my $part_id = "$Apache::inputtags::part.$id";
129: $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';
130: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
131: }
132: return $result;
133: }
134:
135: sub end_radiobuttonresponse {
136: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
137: my $result;
138: if ( $target eq 'edit' ) {
139: $result = &Apache::edit::end_table();
140: }
141: &Apache::response::end_response;
142: pop @Apache::lonxml::namespace;
143: &Apache::lonxml::deregister('Apache::radiobuttonresponse',('foilgroup','foil','conceptgroup'));
144: undef(%Apache::response::foilnames);
145: return $result;
146: }
147:
148: %Apache::response::foilgroup=();
149: sub start_foilgroup {
150: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
151: %Apache::response::foilgroup=();
152: $Apache::radiobuttonresponse::conceptgroup=0;
153: &Apache::response::pushrandomnumber(undef,$target);
154: return;
155: }
156:
157: sub storesurvey {
158: my ($style) = @_;
159: if ( !&Apache::response::submitted() ) { return ''; }
160: my $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
161: &Apache::lonxml::debug("Here I am!:$response:");
162: if ( $response !~ /[0-9]+/) { return ''; }
163: my $part = $Apache::inputtags::part;
164: my $id = $Apache::inputtags::response['-1'];
165: my @whichfoils=@{ $Apache::response::foilgroup{'names'} };
166: my %responsehash;
167: $responsehash{$whichfoils[$response]}=$response;
168: my $responsestr=&Apache::lonnet::hash2str(%responsehash);
169: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
170: $responsestr;
171: my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
172: my $ad;
173: if ($style eq 'anonsurvey') {
174: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS';
175: } elsif ($style eq 'anonsurveycred') {
176: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS_CREDIT';
177: } elsif ($style eq 'surveycred') {
178: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED_CREDIT';
179: } else {
180: $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
181: }
182: &Apache::response::handle_previous(\%previous,$ad);
183: &Apache::lonxml::debug("submitted a $response<br />\n");
184: return '';
185: }
186:
187:
188: sub grade_response {
189: my ($answer, $whichfoils, $bubbles_per_line)=@_;
190:
191: if ( !&Apache::response::submitted() ) { return; }
192: my $response;
193:
194: if ($env{'form.submitted'} eq 'scantron') {
195: $response = &Apache::response::getresponse(1,undef,
196: &bubble_line_count(scalar(@{ $whichfoils}),
197: $bubbles_per_line),
198: $bubbles_per_line);
199:
200: } else {
201: $response = $env{'form.HWVAL_'.$Apache::inputtags::response['-1']};
202: }
203:
204:
205: if ( $response !~ /[0-9]+/) { return; }
206: my $part=$Apache::inputtags::part;
207: my $id = $Apache::inputtags::response['-1'];
208: my %responsehash;
209: $responsehash{$whichfoils->[$response]}=$response;
210: my $responsestr=&Apache::lonnet::hash2str(%responsehash);
211: my %previous=&Apache::response::check_for_previous($responsestr,
212: $part,$id);
213: $Apache::lonhomework::results{"resource.$part.$id.submission"}=
214: $responsestr;
215: &Apache::lonxml::debug("submitted a $response<br />\n");
216: my $ad;
217: if ($response == $answer) {
218: $ad='EXACT_ANS';
219: } else {
220: $ad='INCORRECT';
221: }
222: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
223: &Apache::response::handle_previous(\%previous,$ad);
224: }
225:
226: sub end_foilgroup {
227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
228:
229: my $result;
230: my $bubble_lines;
231: my $answer_count;
232: my $id = $Apache::inputtags::response['-1'];
233: my $part = $Apache::inputtags::part;
234: my $bubbles_per_line = &getbubblesnum($part,$id);
235:
236:
237: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
238: $target eq 'tex' || $target eq 'analyze') {
239: my $style = $Apache::lonhomework::type;
240: my $direction = &Apache::lonxml::get_param('direction',$parstack,
241: $safeeval,'-2');
242: if ( (($style eq 'survey') || ($style eq 'surveycred') ||
243: ($style eq 'anonsurvey') || ($style eq 'anonsurveycred'))
244: && ($target ne 'analyze')) {
245: if ($target eq 'web' || $target eq 'tex') {
246: $result=&displayallfoils($direction, $target);
247: } elsif ( $target eq 'answer' ) {
248: $result=&displayallanswers();
249: } elsif ( $target eq 'grade' ) {
250: $result=&storesurvey($style);
251: }
252: $answer_count = scalar(@{$Apache::response::foilgroup{'names'}});
253:
254: } else {
255:
256: my $name;
257: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,
258: '-2');
259: my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
260: $safeeval,'-2');
261: my ($answer, @shown) = &whichfoils($max, $randomize);
262: $answer_count = scalar(@shown);
263:
264: if ($target eq 'web' || $target eq 'tex') {
265: $result=&displayfoils($target,
266: $answer, \@shown,
267: $direction,
268: $bubbles_per_line);
269: } elsif ($target eq 'answer' ) {
270: $result=&displayanswers($answer, \@shown, $bubbles_per_line);
271: } elsif ( $target eq 'grade') {
272: &grade_response($answer, \@shown, $bubbles_per_line);
273: } elsif ( $target eq 'analyze') {
274: my $bubble_lines = &bubble_line_count($answer_count,
275: $bubbles_per_line);
276: &Apache::response::analyze_store_foilgroup(\@shown,
277: ['text','value','location']);
278: my $part_id="$part.$id";
279: push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },
280: ('true','false'));
281:
282: }
283: }
284: $Apache::lonxml::post_evaluate=0;
285: }
286: if ($target eq 'web') {
287: &Apache::response::setup_prior_tries_hash(\&format_prior_answer,
288: [\%Apache::response::foilgroup]);
289: }
290: &Apache::response::poprandomnumber();
291: $bubble_lines = &bubble_line_count($answer_count, $bubbles_per_line);
292: &Apache::lonxml::increment_counter($bubble_lines,
293: "$part.$id");
294: if ($target eq 'analyze') {
295: &Apache::lonhomework::set_bubble_lines();
296: }
297: return $result;
298: }
299: sub getbubblesnum {
300: my ($part,$id) = @_;
301: my $bubbles_per_line;
302: my $default_numbubbles = $default_bubbles_per_line;
303: if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
304: ($env{'form.bubbles_per_row'} > 0)) {
305: $default_numbubbles = $env{'form.bubbles_per_row'};
306: }
307: $bubbles_per_line =
308: &Apache::response::get_response_param($part."_$id",'numbubbles',
309: $default_numbubbles);
310: return $bubbles_per_line;
311: }
312:
313: sub getfoilcounts {
314: my @names;
315: my $truecnt=0;
316: my $falsecnt=0;
317: my $name;
318: if ( $Apache::response::foilgroup{'names'} ) {
319: @names= @{ $Apache::response::foilgroup{'names'} };
320: }
321: foreach $name (@names) {
322: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
323: $truecnt++;
324: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
325: $falsecnt++;
326: }
327: }
328: return ($truecnt,$falsecnt);
329: }
330:
331: sub format_prior_answer {
332: my ($mode,$answer,$other_data) = @_;
333: my $foil_data = $other_data->[0];
334: my %response = &Apache::lonnet::str2hash($answer);
335: my ($name) = keys(%response);
336: return '<span class="LC_prior_radiobutton">'.
337: $foil_data->{$name.'.text'}.'</span>';
338:
339: }
340:
341:
342: ##
343: # Return the last survey response. The logic is slightly different than that of
344: # get_last_responses. TODO: See if there are chunks of code betweenthis and
345: # get_last_reponses that are common and can be factored.
346: #
347: # @param $part - Problem part under consideration.
348: # @param $showanswer - True if answers should be shown.
349: # @param $id - Problem id.
350: #
351: # @return hash reference.
352: # @retval reference to the has indexed by answer selection that
353: # indicates the most recent answer.
354: #
355: sub get_last_survey_response {
356: my ($part, $showanswer, $id) = @_;
357:
358: my $newvariation;
359: my $lastresponse; # stringified last response.
360:
361: if (
362: (
363: (
364: $Apache::lonhomework::history{"resource.$part.type"} eq
365: 'randomizetry'
366: )
367: || ( $Apache::lonhomework::type eq 'randomizetry' )
368: )
369: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
370: )
371: {
372: if ( $env{ 'form.' . $part . '.rndseed' } ne
373: $Apache::lonhomework::history{"resource.$part.rndseed"} )
374: {
375: $newvariation = 1;
376: }
377: }
378: $showanswer = &Apache::response::show_answer();
379: unless (
380: (
381: (
382: $Apache::lonhomework::history{"resource.$part.type"} eq
383: 'anonsurvey'
384: )
385: || ( $Apache::lonhomework::history{"resource.$part.type"} eq
386: 'anonsurveycred' )
387: )
388: && ( defined( $env{'form.grade_symb'} ) )
389: || ( $newvariation && !$showanswer )
390: )
391: {
392: $lastresponse =
393: $Apache::lonhomework::history{"resource.$part.$id.submission"};
394: }
395: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
396:
397:
398: return \%lastresponse;
399:
400: }
401: ##
402: # Removes the names from a foil group that are marked as unused.
403: #
404: # @param $names - reference to the array of names to filter.
405: #
406: # @return arrayref
407: # @retval reference to the filtered array.
408: #
409: sub remove_unused {
410: my ($names) = @_;
411: my @result;
412:
413: foreach my $name (@{$names}) {
414: if ($Apache::response::foilgroup{$name . '.value'} ne 'unused') {
415: push(@result, $name);
416: }
417: }
418: return \@result;
419: }
420: ##
421: # Displays all foils in a survey type problem for HTML rendition.
422: # TODO: See if there is any logic in this sub that can be shared
423: # with display_foils_html
424: #
425: # @param $names - ref to array of names of the foils to display.
426: # @param $part - Problem part number.
427: # @param $showanswer - If true, show the answers.
428: # @param $lastresponse - Ref to the last response hash.
429: # @param $direction - Display direction of the radiobuttons.
430: #
431: # @return string
432: # @retval HTML required to display the resource in a browser.
433: #
434: sub display_survey_html {
435: my ($names, $part, $showanswer, $lastresponse, $direction) = @_;
436: my $result;
437:
438: # Figure out a few fragments of html that depend onthe
439: # orientation of the radiobuttons:
440: # closing_html - HTML to emit at the end of the resource.
441: # pre_foil - HTML to emit prior to each foil.
442: # post_foil - HTML to emit following each foil.
443: #
444: # The opening HTML is just added to the $result now
445: #
446: # Figuring these outin advance compresses the loop over foils into something
447: # pretty simple:
448: #
449: # NOTE: There's probably a really cool way to do this with style sheets
450: # and picking the selector based on the orientation, if someone wants to puzzle
451: # that out. In that case, probably the whole thing lives in a <div> and each
452: # foil lives in a <p>
453: #
454:
455:
456: my ($opening_html, $closing_html, $pre_foil, $post_foil) =
457: &html_direction_fragments($direction);
458:
459: $result = $opening_html;
460:
461: # Different rendering depending on whether answers are shown:
462: # I played with different factorings but this seems the most concise/clear...
463: # although I don't like the $showanswer conditino inside the loop. Other things I tried
464: # - two loops..much longer code..no gain in clarity.
465: # - Using a visitor patttern passing it the rendering code chunklets and
466: # an anonymous hash reference for state data etc. Very cool but
467: # quite a bit more code and quite a bit less clear.
468:
469: my $temp = 0;
470: foreach my $name (@{$names}) {
471: $result .= $pre_foil;
472:
473: if ($showanswer) {
474: my $foiltext = $Apache::response::foilgroup{$name . '.text'};
475:
476: # Bold the prior response:
477:
478: if (defined($lastresponse->{$name})) {
479: $result .= '<b>' . $foiltext . '</b>';
480: } else {
481: $result .= $foiltext;
482: }
483: } else {
484: $result .= &html_radiobutton(
485: $part, $Apache::inputtags::response['-1'], $name, $lastresponse, $temp
486: );
487: }
488:
489: $result .= $post_foil;
490: $temp++;
491: }
492:
493:
494: $result .= $closing_html;
495: return $result;
496:
497: }
498:
499: ##
500: # Generate LaTeX for surveys.
501: #
502: # @param $names - names of the foils to display.
503: # @param $showanswer - flag that is true to display answers.
504: # @param $lastresponse - Reference to a hash the indicates the last response.
505: # @param $direction - Orientation of foils ('horiztonal' or otherwise).
506: # @param $venv - LaTeX name for vertical env.
507: #
508: # @return string
509: # @retval LaTeX rendering of the survey question.
510:
511: sub latex_survey {
512: my ($names, $showanswer, $lastresponse, $direction, $venv) = @_;
513:
514: my $result;
515: if ($showanswer) {
516: $result .= "\\begin{$venv}";
517: foreach my $name (@{$names}) {
518:
519:
520: $result .= '\item \vskip -2mm ';
521:
522: if ( defined( $lastresponse->{$name} ) ) {
523: $result .= '}';
524: }
525: $result .= $Apache::response::foilgroup{ $name . '.text' } . ' ';
526: }
527: $result .= "\\end{$venv}";
528:
529: } elsif ( $env{'form.pdfFormFields'} eq 'yes'
530: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
531: $result .= &display_pdf_form($names, $direction, $venv);
532: } else {
533: if ($direction eq 'horizontal') {
534: my @foil_texts = &get_foil_texts($names);
535: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
536: $names, \@foil_texts, '$\bigcirc$');
537: } else {
538: $result .= "\\begin{$venv}";
539:
540: my $temp = 0;
541: my $i = 0;
542: foreach my $name (@{$names}) {
543:
544: $result .= '\item \vskip -2mm ';
545:
546: if ($env{'form.pdfFormFields'} ne 'yes'
547: or $Apache::inputtags::status[-1] ne 'CAN_ANSWER' )
548: {
549: $result .=
550: '$\bigcirc$'
551: . $Apache::response::foilgroup{ $name . '.text' }
552: . '\\\\'; #' stupid emacs
553: }
554:
555: $i++;
556: $temp++;
557:
558: $result .= '\vskip 0 mm ';
559: }
560: $result .= "\\end{$venv}";
561: }
562: }
563: return $result;
564: }
565: ##
566: # Figure out the LaTeX environment in which to wrap the LaTeX vertical output.
567: #
568: # @return string
569: # @retval the environment name. The LaTeX should be wrapped a
570: # \begin{retval} \end{retval} pair.
571: #
572: sub latex_vertical_environment {
573: if ($env{'form.pdfFormFields'} eq 'yes'
574: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
575: return 'itemize';
576: } else {
577: return 'enumerate';
578: }
579: }
580:
581: ##
582: # Figure out the key html fragments that depend on the rendering direction:
583: #
584: # @param $direction - 'horizontal' for horizontal direction.
585: #
586: # @return list
587: # @retval (part_start, part_end, foil_start, foil_end)
588: # Where:
589: # - part_start is the HTML to emit at the start of the part.
590: # - part_end is the HTML to emit at the end of the part.
591: # - foil_start is the HTML to emit prior to each foil.
592: # - foil_end is the HTML to emit after each foil
593: #
594: sub html_direction_fragments {
595: my $direction = shift;
596: if ($direction eq 'horizontal') {
597: return ('<table><tr>', '</tr></table>', '<td>', '</td>');
598: } else {
599: return ('', '<br />', '<br />', '');
600: }
601: }
602:
603: ##
604: #
605: # Displays all the foils of a problem in a format suitable for
606: # surveys, surveys for credit, anonymous surveys and anonymous surveys for credit.
607: #
608: # @param $direction - Display direction of the choices ('horiztonal' or not).
609: # @param $target - Rendering target.
610: #
611: # @return string
612: # @retval Text that renders for the selected target.
613: #
614: sub displayallfoils{
615: my ( $direction, $target ) = @_;
616: my $result;
617: &Apache::lonxml::debug("survey style display");
618:
619: my @names;
620:
621: if ( $Apache::response::foilgroup{'names'} ) {
622: @names = @{ $Apache::response::foilgroup{'names'} };
623: }
624:
625:
626: my $id = $Apache::inputtags::response['-1'];
627: my $part = $Apache::inputtags::part;
628:
629: my $showanswer = &Apache::response::show_answer();
630: my $lastresponse = &get_last_survey_response($part, $showanswer, $id);
631: my $used_names = &remove_unused(\@names);
632:
633:
634: if ($target ne 'tex') {
635: $result .= &display_survey_html(
636: $used_names, $part, $showanswer, $lastresponse, $direction
637: );
638: } else {
639:
640: my $vertical_env = &latex_vertical_environment();
641: $result .= &latex_survey(
642: $used_names, $showanswer, $lastresponse, $direction, $vertical_env
643: );
644:
645: }
646: return $result;
647: }
648:
649: sub whichfoils {
650: my ($max,$randomize)=@_;
651:
652: my @truelist;
653: my @falselist;
654: my @whichfalse =();
655: my ($truecnt,$falsecnt) = &getfoilcounts();
656: my $count=0;
657: # we will add in 1 of the true statements
658: if ( $max>0 && ($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; $max=$count; }
659: my $answer=int(&Math::Random::random_uniform() * ($count));
660: &Apache::lonxml::debug("Count is $count, $answer is $answer");
661: my @names;
662: if ( $Apache::response::foilgroup{'names'} ) {
663: @names= @{ $Apache::response::foilgroup{'names'} };
664: }
665: if (&Apache::response::showallfoils()) {
666: @whichfalse=@names;
667: } elsif ($randomize eq 'no') {
668: &Apache::lonxml::debug("No randomization");
669: my $havetrue=0;
670: foreach my $name (@names) {
671: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
672: if (!$havetrue ) {
673: push(@whichfalse,$name); $havetrue++; $answer=$#whichfalse;
674: }
675: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
676: push (@whichfalse,$name);
677: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
678: } else {
679: &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
680: }
681: }
682: if ((!$havetrue) &&
683: ($Apache::lonhomework::type ne 'survey') &&
684: ($Apache::lonhomework::type ne 'surveycred') &&
685: ($Apache::lonhomework::type ne 'anonsurvey') &&
686: ($Apache::lonhomework::type ne 'anonsurveycred')) {
687: &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
688: }
689: } else {
690: my $current=0;
691: &Apache::lonhomework::showhash(%Apache::response::foilgroup);
692: my (%top,%bottom);
693: #first find out where everyone wants to be
694: foreach my $name (@names) {
695: $current++;
696: if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
697: push (@truelist,$name);
698: if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
699: $top{$name}=$current;
700: } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
701: $bottom{$name}=$current;
702: }
703: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
704: push (@falselist,$name);
705: if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
706: $top{$name}=$current;
707: } elsif ($Apache::response::foilgroup{$name.'.location'} eq 'bottom') {
708: $bottom{$name}=$current;
709: }
710: } elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
711: } else {
712: &Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
713: }
714: }
715: #pick a true statement
716: my $notrue=0;
717: if (scalar(@truelist) == 0) { $notrue=1; }
718: my $whichtrue = int(&Math::Random::random_uniform() * ($#truelist+1));
719: &Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
720: my (@toplist, @bottomlist);
721: my $topcount=0;
722: my $bottomcount=0;
723: # assign everyone to either toplist/bottomlist or whichfalse
724: # which false is randomized, toplist bottomlist are in order
725: while ((($#whichfalse+$topcount+$bottomcount) < $max-2) && ($#falselist > -1)) {
726: &Apache::lonxml::debug("Have $#whichfalse max is $max");
727: my $afalse=int(&Math::Random::random_uniform() * ($#falselist+1));
728: &Apache::lonxml::debug("From $#falselist elms, picking $afalse");
729: $afalse=splice(@falselist,$afalse,1);
730: &Apache::lonxml::debug("Picked $afalse");
731: &Apache::lonhomework::showhash(('names'=>\@names));
732: &Apache::lonhomework::showhash(%top);
733: if ($top{$afalse}) {
734: $toplist[$top{$afalse}]=$afalse;
735: $topcount++;
736: } elsif ($bottom{$afalse}) {
737: $bottomlist[$bottom{$afalse}]=$afalse;
738: $bottomcount++;
739: } else {
740: push (@whichfalse,$afalse);
741: }
742: }
743: &Apache::lonxml::debug("Answer wants $answer");
744: my $truename=$truelist[$whichtrue];
745: my $dosplice=1;
746: if (($notrue) &&
747: ($Apache::lonhomework::type ne 'survey') &&
748: ($Apache::lonhomework::type ne 'surveycred') &&
749: ($Apache::lonhomework::type ne 'anonsurvey') &&
750: ($Apache::lonhomework::type ne 'anonsurveycred')) {
751: $dosplice=0;
752: &Apache::lonxml::error(&mt('There are no true statements available.').'<br />');
753: }
754: #insert the true statement, keeping track of where it wants to be
755: if ($Apache::response::foilgroup{$truename.'.location'} eq 'top' && $dosplice) {
756: $toplist[$top{$truename}]=$truename;
757: $answer=-1;
758: foreach my $top (reverse(@toplist)) {
759: if ($top) { $answer++;}
760: if ($top eq $truename) { last; }
761: }
762: $dosplice=0;
763: } elsif ($Apache::response::foilgroup{$truename.'.location'} eq 'bottom' && $dosplice) {
764: $bottomlist[$bottom{$truename}]=$truename;
765: $answer=-1;
766: foreach my $bot (@bottomlist) {
767: if ($bot) { $answer++;}
768: if ($bot eq $truename) { last; }
769: }
770: $answer+=$topcount+$#whichfalse+1;
771: $dosplice=0;
772: } else {
773: if ($topcount>0 || $bottomcount>0) {
774: my $inc = 1;
775: if (($bottomcount > 0) && ($Apache::lonhomework::type ne 'exam')) {
776: $inc = 2;
777: }
778: $answer=int(&Math::Random::random_uniform() * ($#whichfalse+$inc))
779: + $topcount;
780: }
781: }
782: &Apache::lonxml::debug("Answer now wants $answer");
783: #add the top items to the top, bottom items to the bottom
784: for (my $i=0;$i<=$#toplist;$i++) {
785: if ($toplist[$i]) { unshift(@whichfalse,$toplist[$i]) }
786: }
787: for (my $i=0;$i<=$#bottomlist;$i++) {
788: if ($bottomlist[$i]) { push(@whichfalse,$bottomlist[$i]) }
789: }
790: #if the true statement is randomized insert it into the list
791: if ($dosplice) { splice(@whichfalse,$answer,0,$truelist[$whichtrue]); }
792: }
793: &Apache::lonxml::debug("Answer is $answer");
794: return ($answer,@whichfalse);
795: }
796:
797: ##
798: # Return a list of foil texts given foil names.
799: #
800: # @param $whichfoils - Reference to a list of foil names.
801: #
802: # @return array
803: # @retval foil texts
804: #
805: sub get_foil_texts {
806: my ($whichfoils) = @_;
807: my @foil_texts;
808:
809: foreach my $name (@{$whichfoils}) {
810: push(@foil_texts, $Apache::response::foilgroup{$name . '.text'});
811: }
812: return @foil_texts;
813: }
814:
815: ##
816: # Generate the HTML for a single html foil.
817: # @param $part - The part for which the response is being generated.
818: # @param $fieldname - The basename of the radiobutton field
819: # @param $name - The foilname.
820: # @param $last_responses - Reference to a hash that holds the most recent
821: # responses.
822: # @param $value - radiobutton value.
823: #
824: # @return text
825: # @retval The generated html.
826: #
827: sub html_radiobutton {
828: my ($part, $fieldname, $name, $last_responses, $value) = @_;
829:
830: my $result='<label>';
831:
832: $result .= '<input type="radio"
833: onchange="javascript:setSubmittedPart(' . "'$part');\""
834: . 'name="HWVAL_' . $fieldname . '"'
835: . "value='$value'";
836:
837: if (defined($last_responses->{$name})) {
838: $result .= ' checked="checked" ';
839: }
840: $result .= ' />';
841: $result .= $Apache::response::foilgroup{$name . '.text'};
842: $result .= '</label>';
843:
844: return $result;
845:
846: }
847: ##
848: # Return a reference to the last response hash. This hash has exactly
849: # one or zero entries. The one entry is keyed by the foil 'name' of
850: # the prior response
851: #
852: # @param $part - Number of the problem part.
853: #
854: # @return reference to a hash.
855: # @retval see above.
856: #
857: sub get_last_response {
858: my ($part) = @_;
859:
860: my $id = $Apache::inputtags::response['-1'];
861: my ( $lastresponse, $newvariation );
862:
863: if ((( $Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry')
864: || ( $Apache::lonhomework::type eq 'randomizetry' )
865: )
866: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
867: )
868: {
869:
870: if ( $env{ 'form.' . $part . '.rndseed' } ne
871: $Apache::lonhomework::history{"resource.$part.rndseed"} )
872: {
873: $newvariation = 1;
874: }
875: }
876: unless ($newvariation) {
877: $lastresponse =
878: $Apache::lonhomework::history{"resource.$part.$id.submission"};
879: }
880: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
881:
882: return \%lastresponse;
883: }
884:
885: ##
886: # Display foils in html rendition.:
887: #
888: # @param $whichfoils - Set of foils to display.
889: # @param $target - Rendition target...there are several html targets.
890: # @param $direction - 'horizontal' if layout is horizontal.
891: # @param $part - Part of the problem that's being displayed.
892: # @param $show_answer- True if answers should be shown.
893: #
894: # @return string
895: # @retval generated html.
896: #
897: sub display_foils_html {
898: my ($whichfoils, $target, $direction, $part, $show_answer) = @_;
899: my $result;
900:
901:
902: # if the answers get shown, we need to label each item as correct or
903: # incorrect.
904:
905: my ($opening_html, $finalclose, $item_pretext, $item_posttext) =
906: &html_direction_fragments($direction);
907:
908: $result .= $opening_html;
909:
910:
911: if ($show_answer) {
912:
913: foreach my $name (@{$whichfoils}) {
914:
915: # If the item gets further surrounded by tags, this
916: # holds the closures for those tages.
917:
918: my $item_closetag = '';
919:
920: $result .= $item_pretext;
921:
922: # Label each foil as correct or incorrect:
923:
924: if ($Apache::response::foilgroup{$name . '.value'} eq 'true') {
925: $result .= &mt('Correct:') . '<b>';
926: $item_closetag .= '</b>';
927:
928: } else {
929: $result .= &mt('Incorrect');
930: }
931:
932: # Web rendition encloses the
933: # item text in a label tag as well:
934:
935: if ($target eq 'web') {
936: $result .= '<label>';
937: $item_closetag = '</label>' . $item_closetag;
938: }
939: $result .= $Apache::response::foilgroup{$name . '.text'};
940: $result .= $item_closetag;
941: $result .= $item_posttext;
942: $result .= "\n"; # make the html a bit more readable.
943: }
944:
945:
946: } else {
947: my $lastresponse = &get_last_response($part);
948:
949: my $item_no = 0;
950: foreach my $name (@{$whichfoils}) {
951: $result .= $item_pretext;
952: $result .= &html_radiobutton(
953: $part, $Apache::inputtags::response[-1],
954: $name, $lastresponse, $item_no
955: );
956: $result .= $item_posttext;
957: $item_no++;
958: }
959:
960: }
961: $result .= $finalclose;
962:
963: return $result;
964: }
965: ##
966: # Display foils in exam mode for latex
967: #
968: # @param $whichfoils - Reference to an array that contains the foil names to display
969: # @param $bubbles_per_line - Number of bubbles on a line.
970: # @param $direction - Rendering direction 'horizontal' is what we're looking for.
971: # @param $venv - Name of LaTeX environment to use for vertical rendering.
972: #
973: # @return string
974: # @return the latex rendering of the exam problem.
975: #
976: #
977: sub display_latex_exam {
978: my ($whichfoils, $bubbles_per_line, $direction, $venv) = @_;
979: my $result;
980: my $numlines;
981: my $bubble_number = 0;
982: my $line = 0;
983: my $i = 0;
984:
985:
986: if ($direction eq 'horizontal') {
987:
988: # Marshall the display text for each foil and turn things over to
989: # Apache::response::make_horizontal_bubbles:
990:
991: my @foil_texts = &get_foil_texts($whichfoils);
992: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
993: $whichfoils, \@foil_texts, '$\bigcirc$');
994:
995: } else {
996:
997: $result .= '\vskip 2mm \noindent';
998:
999: # This section puts out the prefix that tells the user
1000: # (if necessary) to only choose one bubble in the next n lines
1001: # for problems with more than one line worth of bubbles in the grid sheet:
1002:
1003: my $numitems = scalar( @{$whichfoils} );
1004: $numlines = int( $numitems / $bubbles_per_line );
1005: if ( ( $numitems % $bubbles_per_line ) != 0 ) {
1006: $numlines++;
1007: }
1008: if ( $numlines < 1 ) {
1009: $numlines = 1;
1010: }
1011: if ( $numlines > 1 ) {
1012: my $linetext;
1013: for ( my $i = 0 ; $i < $numlines ; $i++ ) {
1014: $linetext .= $Apache::lonxml::counter + $i . ', ';
1015: }
1016: $linetext =~ s/,\s$//;
1017: $result .=
1018: '\small {\textbf{'
1019: . $linetext . '}} '
1020: . ' {\footnotesize '
1021: . &mt( '(Bubble once in [_1] lines)', $numlines )
1022: . '} \hspace*{\fill} \\\\';
1023: }
1024: else {
1025: $result .= '\textbf{' . $Apache::lonxml::counter . '}.';
1026: }
1027:
1028: # Now output the bubbles themselves:
1029:
1030: foreach my $name (@{$whichfoils}) {
1031: if ( $bubble_number >= $bubbles_per_line ) {
1032: $line++;
1033: $i = 0;
1034: $bubble_number = 0;
1035: }
1036: my $identifier;
1037: if ( $numlines > 1 ) {
1038: $identifier = $Apache::lonxml::counter + $line;
1039: }
1040: my $preindent;
1041: if ($bubble_number > 0) {
1042: $preindent = '\hspace*{3 mm}';
1043: }
1044: my $foiltext = $Apache::response::foilgroup{$name . '.text'};
1045: $foiltext =~ s/\\noindent//; # forgive me for I have sinned..
1046: $result .= '{\small \textbf{'
1047: . $identifier .$preindent
1048: . $alphabet[$i]
1049: . '}}$\bigcirc$'
1050: . $foiltext
1051: . '\\\\'; #' stupid emacs -- it thinks it needs that apostrophe to close the quote
1052:
1053: $i++;
1054: $bubble_number++;
1055: }
1056:
1057: }
1058:
1059: return $result;
1060:
1061: }
1062:
1063: ##
1064: # Display latex when exam mode is not on.
1065: #
1066: # @param $whichfoils - The foils to display
1067: # @param $direction - Display direction ('horizontal' is what matters to us).
1068: # @param $venv - Vertical env. to use for vertical rendering.
1069: # @param $vend - End the vertical environment being used.
1070: #
1071: # @return string
1072: # @retval - The LaTeX rendering of the resource.'
1073: #
1074: sub display_latex {
1075: my ($whichfoils, $direction, $venv) = @_;
1076: my $result;
1077:
1078: # how we render depends on the direction.
1079: # Vertical is some kind of list environment determined by vbegin/vend.
1080: # Horizontal is a table that is generated by
1081: # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string
1082: # for the actual bubble text.
1083:
1084: if ($direction eq 'horizontal') {
1085: my @foil_texts = &get_foil_texts($whichfoils);
1086: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
1087: $whichfoils, \@foil_texts, '');
1088: } else {
1089: $result .= "\\begin{$venv}";
1090: foreach my $name (@{$whichfoils}) {
1091: $result .= '\vspace*{-2 mm}\item '
1092: . $Apache::response::foilgroup{ $name . '.text' };
1093: }
1094:
1095: $result .= "\\end{$venv}";
1096: }
1097: return $result;
1098: }
1099:
1100:
1101: ##
1102: # Render foils for a PDF form. This is a variant of tex rednering that provides
1103: # sufficient markup that the final PDF is a form that can be filled in online,
1104: # or offline.
1105: #
1106: # @param $whichfoils - References an array of foils to display in the order in which
1107: # they should be displayed.
1108: # @param $direction - Rendering direction. 'horiztonal' means inputs are laid out
1109: # horizontally otherwise they are stacked vertically.
1110: # @param $venv - Vertical environment in which to wrap the foils.
1111: #
1112: # @return string
1113: # @retval String containing the rendering of the resource.
1114: #
1115: # TODO: Take into account direction!!!
1116: #
1117: sub display_pdf_form {
1118: my ($whichfoils, $direction, $venv) = @_;
1119: my $temp = 0;
1120: my $result;
1121:
1122: $result .= "\\begin{$venv}";
1123: foreach my $name ( @{$whichfoils} ) {
1124:
1125: my $fieldname =
1126: $env{'request.symb'}
1127: . '&part_'
1128: . $Apache::inputtags::part
1129: . '&radiobuttonresponse'
1130: . '&HWVAL_'
1131: . $Apache::inputtags::response['-1'];
1132: $result .= '\item[{'
1133: . &Apache::lonxml::print_pdf_radiobutton( $fieldname,
1134: $temp )
1135: . '}]'
1136: . $Apache::response::foilgroup{ $name . '.text' }
1137: . "\n";
1138:
1139: $temp++;
1140: }
1141: $result .= "\\end{$venv}";
1142:
1143: return $result;
1144: }
1145:
1146:
1147: ##
1148: # Display selected foils: This is really just a dispatchter to appropriate renderers
1149: #
1150: # @param $target - Target (e.g. 'tex'...).
1151: # @param $answer - True if answers should be shown.
1152: # @param $whichfoils - Array of foil selectors that indicate which foils shouild be
1153: # rendered, in rendering order.
1154: # @param $direction- Rendering direction ('horizontal' is the one we look for,
1155: # otherwise foils are rendered one per line vertically.
1156: # @param $bubbles_per_line - number of exam bubbles per line.
1157: #
1158: # @return string
1159: # @retval The rendered problem.
1160:
1161: sub displayfoils {
1162: my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_;
1163: my $result;
1164:
1165:
1166: my $part = $Apache::inputtags::part;
1167: my $solved = $Apache::lonhomework::history{"resource.$part.solved"};
1168:
1169: # Show answers html.
1170:
1171: if ( ( $target ne 'tex' )
1172: && &Apache::response::show_answer() )
1173: {
1174:
1175: $result = &display_foils_html(
1176: $whichfoils, $target, $direction, $part, 1);
1177:
1178: # other html
1179: } elsif ($target ne 'tex') {
1180: $result = &display_foils_html($whichfoils, $target, $direction, $part,
1181: 0, 0);
1182:
1183: # LaTeX rendering:
1184: } else {
1185:
1186:
1187: my $id = $Apache::inputtags::response['-1'];
1188: my $part = $Apache::inputtags::part;
1189: my $numlines;
1190:
1191: # Decide how to bracket the list of foils:
1192:
1193: my $vertical_env = &latex_vertical_environment();
1194:
1195: # Rendering for latex exams.
1196:
1197: if ( ( $Apache::lonhomework::type eq 'exam' ) )
1198: {
1199: $result .= &display_latex_exam(
1200: $whichfoils, $bubbles_per_line, $direction, $vertical_env);
1201:
1202: $result .= '\vskip 0mm ';
1203:
1204: } else {
1205:
1206: # Different rendering for PDF form than for a
1207: # 'regular' answer direction is honored in both of those
1208: #
1209:
1210: if ( ($env{'form.pdfFormFields'} eq 'yes')
1211: && ($Apache::inputtags::status[-1] eq 'CAN_ANSWER'))
1212: {
1213: $result .= &display_pdf_form($whichfoils, $direction, $vertical_env);
1214: } else {
1215: $result .= &display_latex($whichfoils, $direction, $vertical_env );
1216: }
1217: $result .= '\vskip 0 mm ';
1218:
1219: }
1220: }
1221: return $result;
1222: }
1223:
1224: sub displayallanswers {
1225: my @names;
1226: if ( $Apache::response::foilgroup{'names'} ) {
1227: @names= @{ $Apache::response::foilgroup{'names'} };
1228: }
1229: my $result=&Apache::response::answer_header('radiobuttonresponse');
1230: foreach my $name (@names) {
1231: $result.=&Apache::response::answer_part('radiobuttonresponse',
1232: $Apache::response::foilgroup{$name.'.value'});
1233: }
1234: $result.=&Apache::response::answer_footer('radiobuttonresponse');
1235: return $result;
1236: }
1237:
1238: sub displayanswers {
1239: my ($answer, $whichopt, $bubbles_per_line)=@_;
1240: my $result;
1241:
1242: if ($Apache::lonhomework::type eq 'exam') {
1243: my $line = int($answer/$bubbles_per_line);
1244: my $correct = ('A'..'Z')[$answer%$bubbles_per_line];
1245: $result .= &Apache::response::answer_header('radiobuttonresponse',
1246: $line);
1247: $result .= &Apache::response::answer_part('radiobuttonresponse',
1248: $correct);
1249: } else {
1250: $result .= &Apache::response::answer_header('radiobuttonresponse');
1251: }
1252: foreach my $name (@{ $whichopt }) {
1253: $result.=&Apache::response::answer_part('radiobuttonresponse',
1254: $Apache::response::foilgroup{$name.'.value'});
1255: }
1256: $result.=&Apache::response::answer_footer('radiobuttonresponse');
1257: return $result;
1258: }
1259:
1260: sub start_conceptgroup {
1261: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1262: $Apache::radiobuttonresponse::conceptgroup=1;
1263: %Apache::response::conceptgroup=();
1264: my $result;
1265: if ($target eq 'edit') {
1266: $result.=&Apache::edit::tag_start($target,$token);
1267: $result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
1268: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1269: } elsif ($target eq 'modified') {
1270: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1271: $safeeval,'concept');
1272: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1273: }
1274: return $result;
1275: }
1276:
1277: sub end_conceptgroup {
1278: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1279: $Apache::radiobuttonresponse::conceptgroup=0;
1280: my $result;
1281: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1282: $target eq 'tex' || $target eq 'analyze') {
1283: &Apache::response::pick_foil_for_concept($target,
1284: ['value','text','location'],
1285: \%Apache::hint::radiobutton,
1286: $parstack,$safeeval);
1287: } elsif ($target eq 'edit') {
1288: $result=&Apache::edit::end_table();
1289: }
1290: return $result;
1291: }
1292:
1293: sub insert_conceptgroup {
1294: my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
1295: return $result;
1296: }
1297:
1298: sub start_foil {
1299: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1300: my $result='';
1301: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1302: &Apache::lonxml::startredirection;
1303: if ($target eq 'analyze') {
1304: &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
1305: }
1306: } elsif ($target eq 'edit') {
1307: $result=&Apache::edit::tag_start($target,$token);
1308: $result.=&Apache::edit::text_arg('Name:','name',$token);
1309: $result.=&Apache::edit::select_or_text_arg('Correct Option:','value',
1310: ['unused','true','false'],
1311: $token);
1312: my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
1313: $safeeval,'-3');
1314: if ($randomize ne 'no') {
1315: $result.=&Apache::edit::select_arg('Location:','location',
1316: ['random','top','bottom'],$token);
1317: }
1318: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1319: } elsif ($target eq 'modified') {
1320: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1321: $safeeval,'value','name',
1322: 'location');
1323: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1324: }
1325: return $result;
1326: }
1327:
1328: sub end_foil {
1329: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1330: my $text='';
1331: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1332: $text=&Apache::lonxml::endredirection;
1333: }
1334: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
1335: || $target eq 'tex' || $target eq 'analyze') {
1336: my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
1337: if ($value ne 'unused') {
1338: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
1339: if ($name eq "") {
1340: &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
1341: $name=$Apache::lonxml::curdepth;
1342: }
1343: if (defined($Apache::response::foilnames{$name})) {
1344: &Apache::lonxml::error(&mt('Foil name [_1] appears more than once. Foil names need to be unique.','<b><tt>'.$name.'</tt></b>'));
1345: }
1346: $Apache::response::foilnames{$name}++;
1347: my $location =&Apache::lonxml::get_param('location',$parstack,
1348: $safeeval);
1349: if ( $Apache::radiobuttonresponse::conceptgroup
1350: && !&Apache::response::showallfoils() ) {
1351: push @{ $Apache::response::conceptgroup{'names'} }, $name;
1352: $Apache::response::conceptgroup{"$name.value"} = $value;
1353: $Apache::response::conceptgroup{"$name.text"} = $text;
1354: $Apache::response::conceptgroup{"$name.location"} = $location;
1355: } else {
1356: push @{ $Apache::response::foilgroup{'names'} }, $name;
1357: $Apache::response::foilgroup{"$name.value"} = $value;
1358: $Apache::response::foilgroup{"$name.text"} = $text;
1359: $Apache::response::foilgroup{"$name.location"} = $location;
1360: }
1361: }
1362: }
1363: return '';
1364: }
1365:
1366: sub insert_foil {
1367: return '
1368: <foil name="" value="unused">
1369: <startouttext />
1370: <endouttext />
1371: </foil>';
1372: }
1373:
1374: 1;
1375: __END__
1376:
1377:
1378:
1379: =head1 NAME
1380:
1381: Apache::radiobuttonresponse
1382:
1383: =head1 SYNOPSIS
1384:
1385: Handles multiple-choice style responses.
1386:
1387: This is part of the LearningOnline Network with CAPA project
1388: described at http://www.lon-capa.org.
1389:
1390: =head1 SUBROUTINES
1391:
1392: =over
1393:
1394: =item start_radiobuttonresponse()
1395:
1396: =item bubble_line_count()
1397:
1398: =item end_radiobuttonresponse()
1399:
1400: =item start_foilgroup()
1401:
1402: =item storesurvey()
1403:
1404: =item grade_response()
1405:
1406: =item end_foilgroup()
1407:
1408: =item getfoilcounts()
1409:
1410: =item format_prior_answer()
1411:
1412: =item displayallfoils()
1413:
1414: =item &whichfoils($max,$randomize)
1415:
1416: Randomizes the list of foils.
1417: Respects
1418: - each foils desire to be randomized
1419: - the existance of Concept groups of foils (select 1 foil from each)
1420: - and selects a single correct statement from all possilble true statments
1421: - and limits it to a toal of $max foils
1422:
1423: WARNING: this routine uses the random number generator, it should only
1424: be called once per target, otherwise it can cause randomness changes in
1425: homework problems.
1426:
1427: Arguments
1428: $max - maximum number of foils to select (including the true one)
1429: (so a max of 5 is: 1 true, 4 false)
1430:
1431: $randomize - whether to randomize the listing of foils, by default
1432: will randomize, only if randomize is 'no' will it not
1433:
1434: Returns
1435: $answer - location in the array of the correct answer
1436: @foils - array of foil names in to display order
1437:
1438: =item displayfoils()
1439:
1440: =item displayallanswers()
1441:
1442: =item displayanswers()
1443:
1444: =item start_conceptgroup()
1445:
1446: =item end_conceptgroup()
1447:
1448: =item insert_conceptgroup()
1449:
1450: =item start_foil()
1451:
1452: =item end_foil()
1453:
1454: =item insert_foil()
1455:
1456: =back
1457:
1458: =cut
1459:
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