1: # The LearningOnline Network with CAPA
2: # mutliple choice style responses
3: #
4: # $Id: radiobuttonresponse.pm,v 1.153.6.10 2012/02/05 16:11:57 foxr 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: package Apache::radiobuttonresponse;
29: use strict;
30: use HTML::Entities();
31: use Apache::lonlocal;
32: use Apache::lonnet;
33: use Apache::response;
34: use Apache::caparesponse;
35:
36: my $default_bubbles_per_line = 10;
37: my @alphabet = ( 'A' .. 'Z' ); # Foil labels.
38:
39:
40:
41: BEGIN {
42: &Apache::lonxml::register( 'Apache::radiobuttonresponse',
43: ('radiobuttonresponse') );
44: }
45:
46: #---------------------------------------------------------------------------
47: #
48: # Generic utility subs.
49:
50: sub bubble_line_count {
51: my ( $numfoils, $bubbles_per_line ) = @_;
52: my $bubble_lines;
53: $bubble_lines = int( $numfoils / $bubbles_per_line );
54: if ( ( $numfoils % $bubbles_per_line ) != 0 ) {
55: $bubble_lines++;
56: }
57: return $bubble_lines;
58:
59: }
60:
61:
62: #------------------------------------------------------------------------------
63: #
64: # XML handlers.
65: sub start_radiobuttonresponse {
66: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
67: @_;
68: my $result;
69:
70: #when in a radiobutton response use these
71: &Apache::lonxml::register( 'Apache::radiobuttonresponse',
72: ( 'foilgroup', 'foil', 'conceptgroup' ) );
73: push( @Apache::lonxml::namespace, 'radiobuttonresponse' );
74: my $id = &Apache::response::start_response( $parstack, $safeeval );
75:
76: %Apache::hint::radiobutton = ();
77: undef(%Apache::response::foilnames);
78: if ( $target eq 'meta' ) {
79: $result = &Apache::response::meta_package_write('radiobuttonresponse');
80: }
81: elsif ( $target eq 'edit' ) {
82: $result .=
83: &Apache::edit::start_table($token)
84: . '<tr><td>'
85: . &Apache::lonxml::description($token)
86: . &Apache::loncommon::help_open_topic('Radio_Response_Problems')
87: . '</td>'
88: . '<td><span class="LC_nobreak">'
89: . &mt('Delete?') . ' '
90: . &Apache::edit::deletelist( $target, $token )
91: . '</span></td>'
92: . '<td> '
93: . &Apache::edit::end_row()
94: . &Apache::edit::start_spanning_row();
95: $result .= &Apache::edit::text_arg( 'Max Number Of Shown Foils:',
96: 'max', $token, '4' )
97: . ' ' x 3
98: . &Apache::edit::select_arg( 'Randomize Foil Order:',
99: 'randomize', [ 'yes', 'no' ], $token )
100: . ' ' x 3
101: . &Apache::edit::select_arg(
102: 'Display Direction:', 'direction',
103: [ 'vertical', 'horizontal' ], $token
104: )
105: . &Apache::edit::end_row()
106: . &Apache::edit::start_spanning_row() . "\n";
107: }
108: elsif ( $target eq 'modified' ) {
109: my $constructtag =
110: &Apache::edit::get_new_args( $token, $parstack, $safeeval, 'max',
111: 'randomize', 'direction' );
112: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
113: }
114: elsif ( $target eq 'tex' ) {
115: my $type =
116: &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef,
117: 0 );
118: if ( $type eq '1' ) {
119: $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
120: }
121: elsif ( $type eq 'A' ) {
122: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
123: }
124: elsif ( $type eq 'a' ) {
125: $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
126: }
127: elsif ( $type eq 'i' ) {
128: $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';
129: }
130: else {
131: $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
132: }
133:
134: }
135: elsif ( $target eq 'analyze' ) {
136: my $part_id = "$Apache::inputtags::part.$id";
137: $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';
138: push( @{ $Apache::lonhomework::analyze{"parts"} }, $part_id );
139: }
140: return $result;
141: }
142:
143: sub end_radiobuttonresponse {
144: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
145: @_;
146: my $result;
147: if ( $target eq 'edit' ) { $result = &Apache::edit::end_table(); }
148:
149: &Apache::response::end_response;
150: pop @Apache::lonxml::namespace;
151: &Apache::lonxml::deregister( 'Apache::radiobuttonresponse',
152: ( 'foilgroup', 'foil', 'conceptgroup' ) );
153: undef(%Apache::response::foilnames);
154: return $result;
155: }
156:
157: %Apache::response::foilgroup = ();
158:
159: sub start_foilgroup {
160: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
161: @_;
162: %Apache::response::foilgroup = ();
163: $Apache::radiobuttonresponse::conceptgroup = 0;
164: &Apache::response::pushrandomnumber( undef, $target );
165: return;
166: }
167:
168: sub storesurvey {
169: my ($style) = @_;
170: if ( !&Apache::response::submitted() ) { return ''; }
171: my $response = $env{ 'form.HWVAL_' . $Apache::inputtags::response['-1'] };
172: &Apache::lonxml::debug("Here I am!:$response:");
173: if ( $response !~ /[0-9]+/ ) { return ''; }
174: my $part = $Apache::inputtags::part;
175: my $id = $Apache::inputtags::response['-1'];
176: my @whichfoils = @{ $Apache::response::foilgroup{'names'} };
177: my %responsehash;
178: $responsehash{ $whichfoils[$response] } = $response;
179: my $responsestr = &Apache::lonnet::hash2str(%responsehash);
180: $Apache::lonhomework::results{"resource.$part.$id.submission"} =
181: $responsestr;
182: my %previous =
183: &Apache::response::check_for_previous( $responsestr, $part, $id );
184: my $ad;
185:
186: if ( $style eq 'anonsurvey' ) {
187: $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
188: 'ANONYMOUS';
189: }
190: elsif ( $style eq 'anonsurveycred' ) {
191: $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
192: 'ANONYMOUS_CREDIT';
193: }
194: elsif ( $style eq 'surveycred' ) {
195: $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
196: 'SUBMITTED_CREDIT';
197: }
198: else {
199: $ad = $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} =
200: 'SUBMITTED';
201: }
202: &Apache::response::handle_previous( \%previous, $ad );
203: &Apache::lonxml::debug("submitted a $response<br />\n");
204: return '';
205: }
206:
207: sub grade_response {
208: my ( $answer, $whichfoils, $bubbles_per_line ) = @_;
209:
210: if ( !&Apache::response::submitted() ) { return; }
211: my $response;
212:
213: if ( $env{'form.submitted'} eq 'scantron' ) {
214: $response =
215: &Apache::response::getresponse( 1, undef,
216: &bubble_line_count( scalar( @{$whichfoils} ), $bubbles_per_line ),
217: $bubbles_per_line );
218:
219: }
220: else {
221: $response = $env{ 'form.HWVAL_' . $Apache::inputtags::response['-1'] };
222: }
223:
224: if ( $response !~ /[0-9]+/ ) { return; }
225: my $part = $Apache::inputtags::part;
226: my $id = $Apache::inputtags::response['-1'];
227: my %responsehash;
228: $responsehash{ $whichfoils->[$response] } = $response;
229: my $responsestr = &Apache::lonnet::hash2str(%responsehash);
230: my %previous =
231: &Apache::response::check_for_previous( $responsestr, $part, $id );
232: $Apache::lonhomework::results{"resource.$part.$id.submission"} =
233: $responsestr;
234: &Apache::lonxml::debug("submitted a $response<br />\n");
235: my $ad;
236:
237: if ( $response == $answer ) {
238: $ad = 'EXACT_ANS';
239: }
240: else {
241: $ad = 'INCORRECT';
242: }
243: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"} = $ad;
244: &Apache::response::handle_previous( \%previous, $ad );
245: }
246:
247: sub end_foilgroup {
248: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
249: @_;
250:
251: my $result;
252: my $bubble_lines;
253: my $answer_count;
254: my $id = $Apache::inputtags::response['-1'];
255: my $part = $Apache::inputtags::part;
256: my $bubbles_per_line = &getbubblesnum( $part, $id );
257:
258:
259: if ( $target eq 'grade'
260: || $target eq 'web'
261: || $target eq 'answer'
262: || $target eq 'tex'
263: || $target eq 'analyze' )
264: {
265: my $style = $Apache::lonhomework::type;
266: my $direction =
267: &Apache::lonxml::get_param( 'direction', $parstack, $safeeval, '-2' );
268: if (
269: (
270: ( $style eq 'survey' )
271: || ( $style eq 'surveycred' )
272: || ( $style eq 'anonsurvey' )
273: || ( $style eq 'anonsurveycred' )
274: )
275: && ( $target ne 'analyze' )
276: )
277: {
278: if ( $target eq 'web' || $target eq 'tex' ) {
279: $result = &displayallfoils( $direction, $target );
280: }
281: elsif ( $target eq 'answer' ) {
282: $result = &displayallanswers();
283: }
284: elsif ( $target eq 'grade' ) {
285: $result = &storesurvey($style);
286: }
287: $answer_count =
288: scalar( @{ $Apache::response::foilgroup{'names'} } );
289:
290: }
291: else {
292:
293: my $name;
294: my $max =
295: &Apache::lonxml::get_param( 'max', $parstack, $safeeval, '-2' );
296: my $randomize =
297: &Apache::lonxml::get_param( 'randomize', $parstack, $safeeval,
298: '-2' );
299: my ( $answer, @shown ) = &whichfoils( $max, $randomize );
300: $answer_count = scalar(@shown);
301:
302: if ( $target eq 'web' || $target eq 'tex' ) {
303: $result =
304: &displayfoils( $target, $answer, \@shown, $direction,
305: $bubbles_per_line );
306: }
307: elsif ( $target eq 'answer' ) {
308: $result =
309: &displayanswers( $answer, \@shown, $bubbles_per_line );
310: }
311: elsif ( $target eq 'grade' ) {
312: &grade_response( $answer, \@shown, $bubbles_per_line );
313: }
314: elsif ( $target eq 'analyze' ) {
315: my $bubble_lines =
316: &bubble_line_count( $answer_count, $bubbles_per_line );
317: &Apache::response::analyze_store_foilgroup( \@shown,
318: [ 'text', 'value', 'location' ] );
319: my $part_id = "$part.$id";
320: push(
321: @{ $Apache::lonhomework::analyze{"$part_id.options"} },
322: ( 'true', 'false' )
323: );
324:
325: }
326: }
327: $Apache::lonxml::post_evaluate = 0;
328: }
329: if ( $target eq 'web' ) {
330: &Apache::response::setup_prior_tries_hash( \&format_prior_answer,
331: [ \%Apache::response::foilgroup ] );
332: }
333: &Apache::response::poprandomnumber();
334: $bubble_lines = &bubble_line_count( $answer_count, $bubbles_per_line );
335: &Apache::lonxml::increment_counter( $bubble_lines, "$part.$id" );
336: if ( $target eq 'analyze' ) {
337: &Apache::lonhomework::set_bubble_lines();
338: }
339: return $result;
340: }
341:
342: sub getbubblesnum {
343: my ( $part, $id ) = @_;
344: my $bubbles_per_line;
345: my $default_numbubbles = $default_bubbles_per_line;
346: if ( ( $env{'form.bubbles_per_row'} =~ /^\d+$/ )
347: && ( $env{'form.bubbles_per_row'} > 0 ) )
348: {
349: $default_numbubbles = $env{'form.bubbles_per_row'};
350: }
351: $bubbles_per_line = &Apache::response::get_response_param( $part . "_$id",
352: 'numbubbles', $default_numbubbles );
353: return $bubbles_per_line;
354: }
355:
356: sub getfoilcounts {
357: my @names;
358: my $truecnt = 0;
359: my $falsecnt = 0;
360: my $name;
361: if ( $Apache::response::foilgroup{'names'} ) {
362: @names = @{ $Apache::response::foilgroup{'names'} };
363: }
364: foreach $name (@names) {
365: if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
366: $truecnt++;
367: }
368: elsif ( $Apache::response::foilgroup{ $name . '.value' } eq 'false' ) {
369: $falsecnt++;
370: }
371: }
372: return ( $truecnt, $falsecnt );
373: }
374:
375: sub format_prior_answer {
376: my ( $mode, $answer, $other_data ) = @_;
377: my $foil_data = $other_data->[0];
378: my %response = &Apache::lonnet::str2hash($answer);
379: my ($name) = keys(%response);
380: return
381: '<span class="LC_prior_radiobutton">'
382: . $foil_data->{ $name . '.text' }
383: . '</span>';
384:
385: }
386:
387: ##
388: # Return the last survey response. The logic is slightly different than that of
389: # get_last_responses. TODO: See if there are chunks of code betweenthis and
390: # get_last_reponses that are common and can be factored.
391: #
392: # @param $part - Problem part under consideration.
393: # @param $showanswer - True if answers should be shown.
394: # @param $id - Problem id.
395: #
396: # @return hash reference.
397: # @retval reference to the has indexed by answer selection that
398: # indicates the most recent answer.
399: #
400: sub get_last_survey_response {
401: my ($part, $showanswer, $id) = @_;
402:
403: my $newvariation;
404: my $lastresponse; # stringified last response.
405:
406: if (
407: (
408: (
409: $Apache::lonhomework::history{"resource.$part.type"} eq
410: 'randomizetry'
411: )
412: || ( $Apache::lonhomework::type eq 'randomizetry' )
413: )
414: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
415: )
416: {
417: if ( $env{ 'form.' . $part . '.rndseed' } ne
418: $Apache::lonhomework::history{"resource.$part.rndseed"} )
419: {
420: $newvariation = 1;
421: }
422: }
423: unless (
424: (
425: (
426: $Apache::lonhomework::history{"resource.$part.type"} eq
427: 'anonsurvey'
428: )
429: || ( $Apache::lonhomework::history{"resource.$part.type"} eq
430: 'anonsurveycred' )
431: )
432: && ( defined( $env{'form.grade_symb'} ) )
433: || ( $newvariation && !$showanswer )
434: )
435: {
436: $lastresponse =
437: $Apache::lonhomework::history{"resource.$part.$id.submission"};
438: }
439: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
440:
441:
442: return \%lastresponse;
443:
444: }
445: ##
446: # Removes the names from a foil group that are marked as unused.
447: #
448: # @param $names - reference to the array of names to filter.
449: #
450: # @return arrayref
451: # @retval reference to the filtered array.
452: #
453: sub remove_unused {
454: my ($names) = @_;
455: my @result;
456:
457: foreach my $name (@{$names}) {
458: if ($Apache::response::foilgroup{$name . '.value'} ne 'unused') {
459: push(@result, $name);
460: }
461: }
462: return \@result;
463: }
464: ##
465: # Displays all foils in a survey type problem for HTML rendition.
466: # TODO: See if there is any logic in this sub that can be shared
467: # with display_foils_html
468: #
469: # @param $names - ref to array of names of the foils to display.
470: # @param $part - Problem part number.
471: # @param $showanswer - If true, show the answers.
472: # @param $lastresponse - Ref to the last response hash.
473: # @param $direction - Display direction of the radiobuttons.
474: #
475: # @return string
476: # @retval HTML required to display the resource in a browser.
477: #
478: sub display_survey_html {
479: my ($names, $part, $showanswer, $lastresponse, $direction) = @_;
480: my $result;
481:
482: # Figure out a few fragments of html that depend onthe
483: # orientation of the radiobuttons:
484: # closing_html - HTML to emit at the end of the resource.
485: # pre_foil - HTML to emit prior to each foil.
486: # post_foil - HTML to emit following each foil.
487: #
488: # The opening HTML is just added to the $result now
489: #
490: # Figuring these outin advance compresses the loop over foils into something
491: # pretty simple:
492: #
493: # NOTE: There's probably a really cool way to do this with style sheets
494: # and picking the selector based on the orientation, if someone wants to puzzle
495: # that out. In that case, probably the whole thing lives in a <div> and each
496: # foil lives in a <p>
497: #
498:
499:
500: my ($opening_html, $closing_html, $pre_foil, $post_foil) =
501: &html_direction_fragments($direction);
502:
503: $result = $opening_html;
504:
505: # Different rendering depending on whether answers are shown:
506: # I played with different factorings but this seems the most concise/clear...
507: # although I don't like the $showanswer conditino inside the loop. Other things I tried
508: # - two loops..much longer code..no gain in clarity.
509: # - Using a visitor patttern passing it the rendering code chunklets and
510: # an anonymous hash reference for state data etc. Very cool but
511: # quite a bit more code and quite a bit less clear.
512:
513: my $temp = 0;
514: foreach my $name (@{$names}) {
515: $result .= $pre_foil;
516:
517: if ($showanswer) {
518: my $foiltext = $Apache::response::foilgroup{$name . '.text'};
519:
520: # Bold the prior response:
521:
522: if (defined($lastresponse->{$name})) {
523: $result .= '<b>' . $foiltext . '</b>';
524: } else {
525: $result .= $foiltext;
526: }
527: } else {
528: $result .= &html_radiobutton(
529: $part, $Apache::inputtags::response['-1'], $name, $lastresponse, $temp
530: );
531: }
532:
533: $result .= $post_foil;
534: $temp++;
535: }
536:
537:
538: $result .= $closing_html;
539: return $result;
540:
541: }
542:
543: ##
544: # Generate LaTeX for surveys.
545: #
546: # @param $names - names of the foils to display.
547: # @param $showanswer - flag that is true to display answers.
548: # @param $lastresponse - Reference to a hash the indicates the last response.
549: # @param $direction - Orientation of foils ('horiztonal' or otherwise).
550: # @param $venv - LaTeX name for vertical env.
551: #
552: # @return string
553: # @retval LaTeX rendering of the survey question.
554:
555: sub latex_survey {
556: my ($names, $showanswer, $lastresponse, $direction, $venv) = @_;
557:
558: my $result;
559:
560:
561:
562:
563: if ($showanswer) {
564:
565: $result .= "\\begin{$venv}";
566: foreach my $name (@{$names}) {
567:
568:
569: $result .= '\item \vskip -2mm ';
570:
571: if ( defined( $lastresponse->{$name} ) ) {
572: $result .= '}';
573: }
574: $result .= $Apache::response::foilgroup{ $name . '.text' } . ' ';
575: }
576: $result .= "\\end{$venv}";
577:
578: } elsif ( $env{'form.pdfFormFields'} eq 'yes'
579: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
580: $result .= &display_pdf_form($names, $direction, $venv);
581: } else {
582: if ($direction eq 'horizontal') {
583: my @foil_texts = &get_foil_texts($names);
584: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
585: $names, \@foil_texts, '$\bigcirc$');
586: } else {
587: $result .= "\\begin{$venv}";
588:
589: my $temp = 0;
590: my $i = 0;
591: foreach my $name (@{$names}) {
592:
593: $result .= '\item \vskip -2mm ';
594:
595: if ($env{'form.pdfFormFields'} ne 'yes'
596: or $Apache::inputtags::status[-1] ne 'CAN_ANSWER' )
597: {
598: $result .=
599: '$\bigcirc$'
600: . $Apache::response::foilgroup{ $name . '.text' }
601: . '\\\\'; #' stupid emacs
602: }
603:
604: $i++;
605: $temp++;
606:
607: $result .= '\vskip 0 mm ';
608: }
609: $result .= "\\end{$venv}";
610: }
611:
612:
613: }
614:
615: return $result;
616:
617:
618: }
619: ##
620: # Figure out the LaTeX environment in which to wrap the LaTeX vertical output.
621: #
622: # @return string
623: # @retval the environment name. The LaTeX should be wrapped a
624: # \begin{retval} \end{retval} pair.
625: #
626: sub latex_vertical_environment {
627: if ($env{'form.pdfFormFields'} eq 'yes'
628: && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
629: return 'itemize';
630: } else {
631: return 'enumerate';
632: }
633: }
634:
635: ##
636: # Figure out the key html fragments that depend on the rendering direction:
637: #
638: # @param $direction - 'horizontal' for horizontal direction.
639: #
640: # @return list
641: # @retval (part_start, part_end, foil_start, foil_end)
642: # Where:
643: # - part_start is the HTML to emit at the start of the part.
644: # - part_end is the HTML to emit at the end of the part.
645: # - foil_start is the HTML to emit prior to each foil.
646: # - foil_end is the HTML to emit after each foil
647: #
648: sub html_direction_fragments {
649: my $direction = shift;
650: if ($direction eq 'horizontal') {
651: return ('<table><tr>', '</tr></table>', '<td>', '</td>');
652: } else {
653: return ('', '<br />', '<br />', '');
654: }
655: }
656:
657: ##
658: #
659: # Displays all the foils of a problem in a format suitable for
660: # surveys, surveys for credit, anonymous surveys and anonymous surveys for credit.
661: #
662: # @param $direction - Display direction of the choices ('horiztonal' or not).
663: # @param $target - Rendering target.
664: #
665: # @return string
666: # @retval Text that renders for the selected target.
667: #
668: sub displayallfoils{
669: my ( $direction, $target ) = @_;
670: my $result;
671: &Apache::lonxml::debug("survey style display");
672:
673: my @names;
674:
675: if ( $Apache::response::foilgroup{'names'} ) {
676: @names = @{ $Apache::response::foilgroup{'names'} };
677: }
678:
679:
680: my $id = $Apache::inputtags::response['-1'];
681: my $part = $Apache::inputtags::part;
682:
683: my $showanswer = &Apache::response::show_answer();
684: my $lastresponse = &get_last_survey_response($part, $showanswer, $id);
685: my $used_names = &remove_unused(\@names);
686:
687:
688: if ($target ne 'tex') {
689: $result .= &display_survey_html(
690: $used_names, $part, $showanswer, $lastresponse, $direction
691: );
692: } else {
693:
694: my $vertical_env = &latex_vertical_environment();
695: $result .= &latex_survey(
696: $used_names, $showanswer, $lastresponse, $direction, $vertical_env
697: );
698:
699: }
700:
701:
702:
703: return $result;
704: }
705:
706:
707:
708: sub whichfoils {
709: my ( $max, $randomize ) = @_;
710:
711: my @truelist;
712: my @falselist;
713: my @whichfalse = ();
714: my ( $truecnt, $falsecnt ) = &getfoilcounts();
715: my $count = 0;
716:
717: # we will add in 1 of the true statements
718: if ( $max > 0 && ( $falsecnt + 1 ) > $max ) { $count = $max }
719: else { $count = $falsecnt + 1; $max = $count; }
720: my $answer = int( &Math::Random::random_uniform() * ($count) );
721: &Apache::lonxml::debug("Count is $count, $answer is $answer");
722: my @names;
723: if ( $Apache::response::foilgroup{'names'} ) {
724: @names = @{ $Apache::response::foilgroup{'names'} };
725: }
726: if ( &Apache::response::showallfoils() ) {
727: @whichfalse = @names;
728: }
729: elsif ( $randomize eq 'no' ) {
730: &Apache::lonxml::debug("No randomization");
731: my $havetrue = 0;
732: foreach my $name (@names) {
733: if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
734: if ( !$havetrue ) {
735: push( @whichfalse, $name );
736: $havetrue++;
737: $answer = $#whichfalse;
738: }
739: }
740: elsif (
741: $Apache::response::foilgroup{ $name . '.value' } eq 'false' )
742: {
743: push( @whichfalse, $name );
744: }
745: elsif (
746: $Apache::response::foilgroup{ $name . '.value' } eq 'unused' )
747: {
748: }
749: else {
750: &Apache::lonxml::error(
751: &HTML::Entities::encode(
752: "No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",
753: '<>&"'
754: )
755: );
756: }
757: }
758: if ( ( !$havetrue )
759: && ( $Apache::lonhomework::type ne 'survey' )
760: && ( $Apache::lonhomework::type ne 'surveycred' )
761: && ( $Apache::lonhomework::type ne 'anonsurvey' )
762: && ( $Apache::lonhomework::type ne 'anonsurveycred' ) )
763: {
764: &Apache::lonxml::error(
765: &mt('There are no true statements available.') . '<br />' );
766: }
767: }
768: else {
769: my $current = 0;
770: &Apache::lonhomework::showhash(%Apache::response::foilgroup);
771: my ( %top, %bottom );
772:
773: #first find out where everyone wants to be
774: foreach my $name (@names) {
775: $current++;
776: if ( $Apache::response::foilgroup{ $name . '.value' } eq 'true' ) {
777: push( @truelist, $name );
778: if ( $Apache::response::foilgroup{ $name . '.location' } eq
779: 'top' )
780: {
781: $top{$name} = $current;
782: }
783: elsif ( $Apache::response::foilgroup{ $name . '.location' } eq
784: 'bottom' )
785: {
786: $bottom{$name} = $current;
787: }
788: }
789: elsif (
790: $Apache::response::foilgroup{ $name . '.value' } eq 'false' )
791: {
792: push( @falselist, $name );
793: if ( $Apache::response::foilgroup{ $name . '.location' } eq
794: 'top' )
795: {
796: $top{$name} = $current;
797: }
798: elsif ( $Apache::response::foilgroup{ $name . '.location' } eq
799: 'bottom' )
800: {
801: $bottom{$name} = $current;
802: }
803: }
804: elsif (
805: $Apache::response::foilgroup{ $name . '.value' } eq 'unused' )
806: {
807: }
808: else {
809: &Apache::lonxml::error(
810: &HTML::Entities::encode(
811: "No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",
812: '<>&"'
813: )
814: );
815: }
816: }
817:
818: #pick a true statement
819: my $notrue = 0;
820: if ( scalar(@truelist) == 0 ) { $notrue = 1; }
821: my $whichtrue =
822: int( &Math::Random::random_uniform() * ( $#truelist + 1 ) );
823: &Apache::lonxml::debug(
824: "Max is $max, From $#truelist elms, picking $whichtrue");
825: my ( @toplist, @bottomlist );
826: my $topcount = 0;
827: my $bottomcount = 0;
828:
829: # assign everyone to either toplist/bottomlist or whichfalse
830: # which false is randomized, toplist bottomlist are in order
831: while (( ( $#whichfalse + $topcount + $bottomcount ) < $max - 2 )
832: && ( $#falselist > -1 ) )
833: {
834: &Apache::lonxml::debug("Have $#whichfalse max is $max");
835: my $afalse =
836: int( &Math::Random::random_uniform() * ( $#falselist + 1 ) );
837: &Apache::lonxml::debug("From $#falselist elms, picking $afalse");
838: $afalse = splice( @falselist, $afalse, 1 );
839: &Apache::lonxml::debug("Picked $afalse");
840: &Apache::lonhomework::showhash( ( 'names' => \@names ) );
841: &Apache::lonhomework::showhash(%top);
842: if ( $top{$afalse} ) {
843: $toplist[ $top{$afalse} ] = $afalse;
844: $topcount++;
845: }
846: elsif ( $bottom{$afalse} ) {
847: $bottomlist[ $bottom{$afalse} ] = $afalse;
848: $bottomcount++;
849: }
850: else {
851: push( @whichfalse, $afalse );
852: }
853: }
854: &Apache::lonxml::debug("Answer wants $answer");
855: my $truename = $truelist[$whichtrue];
856: my $dosplice = 1;
857: if ( ($notrue)
858: && ( $Apache::lonhomework::type ne 'survey' )
859: && ( $Apache::lonhomework::type ne 'surveycred' )
860: && ( $Apache::lonhomework::type ne 'anonsurvey' )
861: && ( $Apache::lonhomework::type ne 'anonsurveycred' ) )
862: {
863: $dosplice = 0;
864: &Apache::lonxml::error(
865: &mt('There are no true statements available.') . '<br />' );
866: }
867:
868: #insert the true statement, keeping track of where it wants to be
869: if ( $Apache::response::foilgroup{ $truename . '.location' } eq 'top'
870: && $dosplice )
871: {
872: $toplist[ $top{$truename} ] = $truename;
873: $answer = -1;
874: foreach my $top ( reverse(@toplist) ) {
875: if ($top) { $answer++; }
876: if ( $top eq $truename ) { last; }
877: }
878: $dosplice = 0;
879: }
880: elsif (
881: $Apache::response::foilgroup{ $truename . '.location' } eq 'bottom'
882: && $dosplice )
883: {
884: $bottomlist[ $bottom{$truename} ] = $truename;
885: $answer = -1;
886: foreach my $bot (@bottomlist) {
887: if ($bot) { $answer++; }
888: if ( $bot eq $truename ) { last; }
889: }
890: $answer += $topcount + $#whichfalse + 1;
891: $dosplice = 0;
892: }
893: else {
894: if ( $topcount > 0 || $bottomcount > 0 ) {
895: my $inc = 1;
896: if ( ( $bottomcount > 0 )
897: && ( $Apache::lonhomework::type ne 'exam' ) )
898: {
899: $inc = 2;
900: }
901: $answer = int(
902: &Math::Random::random_uniform() * ( $#whichfalse + $inc ) )
903: + $topcount;
904: }
905: }
906: &Apache::lonxml::debug("Answer now wants $answer");
907:
908: #add the top items to the top, bottom items to the bottom
909: for ( my $i = 0 ; $i <= $#toplist ; $i++ ) {
910: if ( $toplist[$i] ) { unshift( @whichfalse, $toplist[$i] ) }
911: }
912: for ( my $i = 0 ; $i <= $#bottomlist ; $i++ ) {
913: if ( $bottomlist[$i] ) { push( @whichfalse, $bottomlist[$i] ) }
914: }
915:
916: #if the true statement is randomized insert it into the list
917: if ($dosplice) {
918: splice( @whichfalse, $answer, 0, $truelist[$whichtrue] );
919: }
920: }
921: &Apache::lonxml::debug("Answer is $answer");
922: return ( $answer, @whichfalse );
923: }
924:
925: ##
926: # Return a list of foil texts given foil names.
927: #
928: # @param $whichfoils - Reference to a list of foil names.
929: #
930: # @return array
931: # @retval foil texts
932: #
933: sub get_foil_texts {
934: my ($whichfoils) = @_;
935: my @foil_texts;
936:
937: foreach my $name (@{$whichfoils}) {
938: push(@foil_texts, $Apache::response::foilgroup{$name . '.text'});
939: }
940: return @foil_texts;
941: }
942:
943: ##
944: # Generate the HTML for a single html foil.
945: # @param $part - The part for which the response is being generated.
946: # @param $fieldname - The basename of the radiobutton field
947: # @param $name - The foilname.
948: # @param $last_responses - Reference to a hash that holds the most recent
949: # responses.
950: # @param $value - radiobutton value.
951: #
952: # @return text
953: # @retval The generated html.
954: #
955: sub html_radiobutton {
956: my ($part, $fieldname, $name, $last_responses, $value) = @_;
957:
958: my $result='<label>';
959:
960: $result .= '<input type="radio"
961: onchange="javascript:setSubmittedPart(' . "'$part');\""
962: . 'name="HWVAL_' . $fieldname . '"'
963: . "value='$value'";
964:
965: if (defined($last_responses->{$name})) {
966: $result .= ' checked="checked" ';
967: }
968: $result .= ' />';
969: $result .= $Apache::response::foilgroup{$name . '.text'};
970: $result .= '</label>';
971:
972: return $result;
973:
974: }
975: ##
976: # Return a reference to the last response hash. This hash has exactly
977: # one or zero entries. The one entry is keyed by the foil 'name' of
978: # the prior response
979: #
980: # @param $part - Number of the problem part.
981: #
982: # @return reference to a hash.
983: # @retval see above.
984: #
985: sub get_last_response {
986: my ($part) = @_;
987:
988: my $id = $Apache::inputtags::response['-1'];
989: my ( $lastresponse, $newvariation );
990:
991: if ((( $Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry')
992: || ( $Apache::lonhomework::type eq 'randomizetry' )
993: )
994: && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
995: )
996: {
997:
998: if ( $env{ 'form.' . $part . '.rndseed' } ne
999: $Apache::lonhomework::history{"resource.$part.rndseed"} )
1000: {
1001: $newvariation = 1;
1002: }
1003: }
1004: unless ($newvariation) {
1005: $lastresponse =
1006: $Apache::lonhomework::history{"resource.$part.$id.submission"};
1007: }
1008: my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
1009:
1010: return \%lastresponse;
1011: }
1012:
1013: ##
1014: # Display foils in html rendition.:
1015: #
1016: # @param $whichfoils - Set of foils to display.
1017: # @param $target - Rendition target...there are several html targets.
1018: # @param $direction - 'horizontal' if layout is horizontal.
1019: # @param $part - Part of the problem that's being displayed.
1020: # @param $show_answer- True if answers should be shown.
1021: #
1022: # @return string
1023: # @retval generated html.
1024: #
1025: sub display_foils_html {
1026: my ($whichfoils, $target, $direction, $part, $show_answer) = @_;
1027: my $result;
1028:
1029:
1030: # if the answers get shown, we need to label each item as correct or
1031: # incorrect.
1032:
1033: my ($opening_html, $finalclose, $item_pretext, $item_posttext) =
1034: &html_direction_fragments($direction);
1035:
1036: $result .= $opening_html;
1037:
1038:
1039: if ($show_answer) {
1040:
1041: foreach my $name (@{$whichfoils}) {
1042:
1043: # If the item gets further surrounded by tags, this
1044: # holds the closures for those tages.
1045:
1046: my $item_closetag = '';
1047:
1048: $result .= $item_pretext;
1049:
1050: # Label each foil as correct or incorrect:
1051:
1052: if ($Apache::response::foilgroup{$name . '.value'} eq 'true') {
1053: $result .= &mt('Correct:') . '<b>';
1054: $item_closetag .= '</b>';
1055:
1056: } else {
1057: $result .= &mt('Incorrect');
1058: }
1059:
1060: # Web rendition encloses the
1061: # item text in a label tag as well:
1062:
1063: if ($target eq 'web') {
1064: $result .= '<label>';
1065: $item_closetag = '</label>' . $item_closetag;
1066: }
1067: $result .= $Apache::response::foilgroup{$name . '.text'};
1068: $result .= $item_closetag;
1069: $result .= $item_posttext;
1070: $result .= "\n"; # make the html a bit more readable.
1071: }
1072:
1073:
1074: } else {
1075: my $lastresponse = &get_last_response($part);
1076:
1077: my $item_no = 0;
1078: foreach my $name (@{$whichfoils}) {
1079: $result .= $item_pretext;
1080: $result .= &html_radiobutton(
1081: $part, $Apache::inputtags::response[-1],
1082: $name, $lastresponse, $item_no
1083: );
1084: $result .= $item_posttext;
1085: $item_no++;
1086: }
1087:
1088: }
1089: $result .= $finalclose;
1090:
1091: return $result;
1092: }
1093: ##
1094: # Display foils in exam mode for latex
1095: #
1096: # @param $whichfoils - Reference to an array that contains the foil names to display
1097: # @param $bubbles_per_line - Number of bubbles on a line.
1098: # @param $direction - Rendering direction 'horizontal' is what we're looking for.
1099: # @param $venv - Name of LaTeX environment to use for vertical rendering.
1100: #
1101: # @return string
1102: # @return the latex rendering of the exam problem.
1103: #
1104: #
1105: sub display_latex_exam {
1106: my ($whichfoils, $bubbles_per_line, $direction, $venv) = @_;
1107: my $result;
1108: my $numlines;
1109: my $bubble_number = 0;
1110: my $line = 0;
1111: my $i = 0;
1112:
1113:
1114: if ($direction eq 'horizontal') {
1115:
1116: # Marshall the display text for each foil and turn things over to
1117: # Apache::response::make_horizontal_bubbles:
1118:
1119: my @foil_texts = &get_foil_texts($whichfoils);
1120: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
1121: $whichfoils, \@foil_texts, '$\bigcirc$');
1122:
1123: } else {
1124: $result .= "\\begin{$venv}";
1125:
1126: # This section puts out the prefix that tells the user
1127: # (if necessary) to only choose one bubble in the next n lines
1128: # for problems with more than one line worth of bubbles in the grid sheet:
1129:
1130: my $numitems = scalar( @{$whichfoils} );
1131: $numlines = int( $numitems / $bubbles_per_line );
1132: if ( ( $numitems % $bubbles_per_line ) != 0 ) {
1133: $numlines++;
1134: }
1135: if ( $numlines < 1 ) {
1136: $numlines = 1;
1137: }
1138: if ( $numlines > 1 ) {
1139: my $linetext;
1140: for ( my $i = 0 ; $i < $numlines ; $i++ ) {
1141: $linetext .= $Apache::lonxml::counter + $i . ', ';
1142: }
1143: $linetext =~ s/,\s$//;
1144: $result .=
1145: '\item[\small {\textbf{'
1146: . $linetext . '}}]'
1147: . ' {\footnotesize '
1148: . &mt( '(Bubble once in [_1] lines)', $numlines )
1149: . '} \hspace*{\fill} \\\\';
1150: }
1151: else {
1152: $result .= '\item[\textbf{' . $Apache::lonxml::counter . '}.]';
1153: }
1154:
1155: # Now output the bubbles themselves:
1156:
1157: foreach my $name (@{$whichfoils}) {
1158: if ( $bubble_number >= $bubbles_per_line ) {
1159: $line++;
1160: $i = 0;
1161: $bubble_number = 0;
1162: }
1163: my $identifier;
1164: if ( $numlines > 1 ) {
1165: $identifier = $Apache::lonxml::counter + $line;
1166: }
1167: $result .=
1168: '{\small \textbf{'
1169: . $identifier
1170: . $alphabet[$i]
1171: . '}}$\bigcirc$'
1172: . $Apache::response::foilgroup{ $name . '.text' }
1173: . '\\\\'; #' stupid emacs -- it thinks it needs that apostrophe to close the quote
1174:
1175: $i++;
1176: $bubble_number++;
1177: }
1178: $result .= "\\end{$venv}";
1179:
1180: }
1181:
1182: return $result;
1183:
1184: }
1185:
1186: ##
1187: # Display latex when exam mode is not on.
1188: #
1189: # @param $whichfoils - The foils to display
1190: # @param $direction - Display direction ('horizontal' is what matters to us).
1191: # @param $venv - Vertical env. to use for vertical rendering.
1192: # @param $vend - End the vertical environment being used.
1193: #
1194: # @return string
1195: # @retval - The LaTeX rendering of the resource.'
1196: #
1197: sub display_latex {
1198: my ($whichfoils, $direction, $venv) = @_;
1199: my $result;
1200:
1201: # how we render depends on the direction.
1202: # Vertical is some kind of list environment determined by vbegin/vend.
1203: # Horizontal is a table that is generated by
1204: # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string
1205: # for the actual bubble text.
1206:
1207: if ($direction eq 'horizontal') {
1208: my @foil_texts = &get_foil_texts($whichfoils);
1209: $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
1210: $whichfoils, \@foil_texts, '');
1211: } else {
1212: $result .= "\\begin{$venv}";
1213: foreach my $name (@{$whichfoils}) {
1214: $result .= '\vspace*{-2 mm}\item '
1215: . $Apache::response::foilgroup{ $name . '.text' };
1216: }
1217:
1218: $result .= "\\end{$venv}";
1219: }
1220: return $result;
1221: }
1222:
1223:
1224: ##
1225: # Render foils for a PDF form. This is a variant of tex rednering that provides
1226: # sufficient markup that the final PDF is a form that can be filled in online,
1227: # or offline.
1228: #
1229: # @param $whichfoils - References an array of foils to display in the order in which
1230: # they should be displayed.
1231: # @param $direction - Rendering direction. 'horiztonal' means inputs are laid out
1232: # horizontally otherwise they are stacked vertically.
1233: # @param $venv - Vertical environment in which to wrap the foils.
1234: #
1235: # @return string
1236: # @retval String containing the rendering of the resource.
1237: #
1238: # TODO: Take into account direction!!!
1239: #
1240: sub display_pdf_form {
1241: my ($whichfoils, $direction, $venv) = @_;
1242: my $temp = 0;
1243: my $result;
1244:
1245: $result .= "\\begin{$venv}";
1246: foreach my $name ( @{$whichfoils} ) {
1247:
1248: my $fieldname =
1249: $env{'request.symb'}
1250: . '&part_'
1251: . $Apache::inputtags::part
1252: . '&radiobuttonresponse'
1253: . '&HWVAL_'
1254: . $Apache::inputtags::response['-1'];
1255: $result .= '\item[{'
1256: . &Apache::lonxml::print_pdf_radiobutton( $fieldname,
1257: $temp )
1258: . '}]'
1259: . $Apache::response::foilgroup{ $name . '.text' }
1260: . "\n";
1261:
1262: $temp++;
1263: }
1264: $result .= "\\end{$venv}";
1265:
1266: return $result;
1267: }
1268:
1269:
1270: ##
1271: # Display selected foils: This is really just a dispatchter to appropriate renderers
1272: #
1273: # @param $target - Target (e.g. 'tex'...).
1274: # @param $answer - True if answers should be shown.
1275: # @param $whichfoils - Array of foil selectors that indicate which foils shouild be
1276: # rendered, in rendering order.
1277: # @param $direction- Rendering direction ('horizontal' is the one we look for,
1278: # otherwise foils are rendered one per line vertically.
1279: # @param $bubbles_per_line - number of exam bubbles per line.
1280: #
1281: # @return string
1282: # @retval The rendered problem.
1283:
1284: sub displayfoils {
1285: my ( $target, $answer, $whichfoils, $direction, $bubbles_per_line ) = @_;
1286: my $result;
1287:
1288: my $part = $Apache::inputtags::part;
1289: my $solved = $Apache::lonhomework::history{"resource.$part.solved"};
1290:
1291: # Show answers html.
1292:
1293: if ( ( $target ne 'tex' )
1294: && &Apache::response::show_answer() )
1295: {
1296:
1297: $result = &display_foils_html(
1298: $whichfoils, $target, $direction, $part, 1);
1299:
1300: # other html
1301: } elsif ($target ne 'tex') {
1302: $result = &display_foils_html($whichfoils, $target, $direction, $part,
1303: 0, 0);
1304:
1305: # LaTeX rendering:
1306: } else {
1307:
1308:
1309: my $id = $Apache::inputtags::response['-1'];
1310: my $part = $Apache::inputtags::part;
1311: my $numlines;
1312:
1313: # Decide how to bracket the list of foils:
1314:
1315: my $vertical_env = &latex_vertical_environment();
1316:
1317: # Rendering for latex exams.
1318:
1319: if ( ( $Apache::lonhomework::type eq 'exam' ) )
1320: {
1321: $result .= &display_latex_exam(
1322: $whichfoils, $bubbles_per_line, $direction, $vertical_env);
1323:
1324: $result .= '\vskip 0mm ';
1325:
1326: } else {
1327:
1328: # Different rendering for PDF form than for a
1329: # 'regular' answer direction is honored in both of those
1330: #
1331:
1332: if ( ($env{'form.pdfFormFields'} eq 'yes')
1333: && ($Apache::inputtags::status[-1] eq 'CAN_ANSWER'))
1334: {
1335: $result .= &display_pdf_form($whichfoils, $direction, $vertical_env);
1336: } else {
1337: $result .= &display_latex($whichfoils, $direction, $vertical_env );
1338: }
1339: $result .= '\vskip 0 mm ';
1340:
1341: }
1342:
1343:
1344: }
1345: return $result;
1346: }
1347:
1348: sub displayallanswers {
1349: my @names;
1350: if ( $Apache::response::foilgroup{'names'} ) {
1351: @names = @{ $Apache::response::foilgroup{'names'} };
1352: }
1353: my $result = &Apache::response::answer_header('radiobuttonresponse');
1354: foreach my $name (@names) {
1355: $result .=
1356: &Apache::response::answer_part( 'radiobuttonresponse',
1357: $Apache::response::foilgroup{ $name . '.value' } );
1358: }
1359: $result .= &Apache::response::answer_footer('radiobuttonresponse');
1360: return $result;
1361: }
1362:
1363: sub displayanswers {
1364: my ( $answer, $whichopt, $bubbles_per_line ) = @_;
1365: my $result;
1366:
1367: if ( $Apache::lonhomework::type eq 'exam' ) {
1368: my $line = int( $answer / $bubbles_per_line );
1369: my $correct = ( 'A' .. 'Z' )[ $answer % $bubbles_per_line ];
1370: $result .=
1371: &Apache::response::answer_header( 'radiobuttonresponse', $line );
1372: $result .=
1373: &Apache::response::answer_part( 'radiobuttonresponse', $correct );
1374: }
1375: else {
1376: $result .= &Apache::response::answer_header('radiobuttonresponse');
1377: }
1378: foreach my $name ( @{$whichopt} ) {
1379: $result .=
1380: &Apache::response::answer_part( 'radiobuttonresponse',
1381: $Apache::response::foilgroup{ $name . '.value' } );
1382: }
1383: $result .= &Apache::response::answer_footer('radiobuttonresponse');
1384: return $result;
1385: }
1386:
1387: sub start_conceptgroup {
1388: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
1389: @_;
1390: $Apache::radiobuttonresponse::conceptgroup = 1;
1391: %Apache::response::conceptgroup = ();
1392: my $result;
1393: if ( $target eq 'edit' ) {
1394: $result .= &Apache::edit::tag_start( $target, $token );
1395: $result .=
1396: &Apache::edit::text_arg( 'Concept:', 'concept', $token, '50' )
1397: . &Apache::edit::end_row()
1398: . &Apache::edit::start_spanning_row();
1399: }
1400: elsif ( $target eq 'modified' ) {
1401: my $constructtag =
1402: &Apache::edit::get_new_args( $token, $parstack, $safeeval,
1403: 'concept' );
1404: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1405: }
1406: return $result;
1407: }
1408:
1409: sub end_conceptgroup {
1410: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
1411: @_;
1412: $Apache::radiobuttonresponse::conceptgroup = 0;
1413: my $result;
1414: if ( $target eq 'web'
1415: || $target eq 'grade'
1416: || $target eq 'answer'
1417: || $target eq 'tex'
1418: || $target eq 'analyze' )
1419: {
1420: &Apache::response::pick_foil_for_concept( $target,
1421: [ 'value', 'text', 'location' ],
1422: \%Apache::hint::radiobutton, $parstack, $safeeval );
1423: }
1424: elsif ( $target eq 'edit' ) {
1425: $result = &Apache::edit::end_table();
1426: }
1427: return $result;
1428: }
1429:
1430: sub insert_conceptgroup {
1431: my $result =
1432: "\n\t\t<conceptgroup concept=\"\">"
1433: . &insert_foil()
1434: . "\n\t\t</conceptgroup>\n";
1435: return $result;
1436: }
1437:
1438: sub start_foil {
1439: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
1440: @_;
1441: my $result = '';
1442: if ( $target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
1443: &Apache::lonxml::startredirection;
1444: if ( $target eq 'analyze' ) {
1445: &Apache::response::check_if_computed( $token, $parstack, $safeeval,
1446: 'value' );
1447: }
1448: }
1449: elsif ( $target eq 'edit' ) {
1450: $result = &Apache::edit::tag_start( $target, $token );
1451: $result .= &Apache::edit::text_arg( 'Name:', 'name', $token );
1452: $result .= &Apache::edit::select_or_text_arg(
1453: 'Correct Option:', 'value',
1454: [ 'unused', 'true', 'false' ], $token
1455: );
1456: my $randomize =
1457: &Apache::lonxml::get_param( 'randomize', $parstack, $safeeval, '-3' );
1458: if ( $randomize ne 'no' ) {
1459: $result .=
1460: &Apache::edit::select_arg( 'Location:', 'location',
1461: [ 'random', 'top', 'bottom' ], $token );
1462: }
1463: $result .=
1464: &Apache::edit::end_row() . &Apache::edit::start_spanning_row();
1465: }
1466: elsif ( $target eq 'modified' ) {
1467: my $constructtag =
1468: &Apache::edit::get_new_args( $token, $parstack, $safeeval, 'value',
1469: 'name', 'location' );
1470: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1471: }
1472: return $result;
1473: }
1474:
1475: sub end_foil {
1476: my ( $target, $token, $tagstack, $parstack, $parser, $safeeval, $style ) =
1477: @_;
1478: my $text = '';
1479: if ( $target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
1480: $text = &Apache::lonxml::endredirection;
1481: }
1482: if ( $target eq 'web'
1483: || $target eq 'grade'
1484: || $target eq 'answer'
1485: || $target eq 'tex'
1486: || $target eq 'analyze' )
1487: {
1488: my $value = &Apache::lonxml::get_param( 'value', $parstack, $safeeval );
1489: if ( $value ne 'unused' ) {
1490: my $name =
1491: &Apache::lonxml::get_param( 'name', $parstack, $safeeval );
1492: if ( $name eq "" ) {
1493: &Apache::lonxml::warning(
1494: &mt(
1495: 'Foils without names exist. This can cause problems to malfunction.'
1496: )
1497: );
1498: $name = $Apache::lonxml::curdepth;
1499: }
1500: if ( defined( $Apache::response::foilnames{$name} ) ) {
1501: &Apache::lonxml::error(
1502: &mt(
1503: 'Foil name [_1] appears more than once. Foil names need to be unique.',
1504: '<b><tt>' . $name . '</tt></b>'
1505: )
1506: );
1507: }
1508: $Apache::response::foilnames{$name}++;
1509: my $location =
1510: &Apache::lonxml::get_param( 'location', $parstack, $safeeval );
1511: if ( $Apache::radiobuttonresponse::conceptgroup
1512: && !&Apache::response::showallfoils() )
1513: {
1514: push @{ $Apache::response::conceptgroup{'names'} }, $name;
1515: $Apache::response::conceptgroup{"$name.value"} = $value;
1516: $Apache::response::conceptgroup{"$name.text"} = $text;
1517: $Apache::response::conceptgroup{"$name.location"} = $location;
1518: }
1519: else {
1520: push @{ $Apache::response::foilgroup{'names'} }, $name;
1521: $Apache::response::foilgroup{"$name.value"} = $value;
1522: $Apache::response::foilgroup{"$name.text"} = $text;
1523: $Apache::response::foilgroup{"$name.location"} = $location;
1524: }
1525: }
1526: }
1527: return '';
1528: }
1529:
1530: sub insert_foil {
1531: return '
1532: <foil name="" value="unused">
1533: <startouttext />
1534: <endouttext />
1535: </foil>';
1536: }
1537:
1538: 1;
1539: __END__
1540:
1541:
1542:
1543: =head1 NAME
1544:
1545: Apache::radiobuttonresponse
1546:
1547: =head1 SYNOPSIS
1548:
1549: Handles multiple-choice style responses.
1550:
1551: This is part of the LearningOnline Network with CAPA project
1552: described at http://www.lon-capa.org.
1553:
1554: =head1 SUBROUTINES
1555:
1556: =over
1557:
1558: =item start_radiobuttonresponse()
1559:
1560: =item bubble_line_count()
1561:
1562: =item end_radiobuttonresponse()
1563:
1564: =item start_foilgroup()
1565:
1566: =item storesurvey()
1567:
1568: =item grade_response()
1569:
1570: =item end_foilgroup()
1571:
1572: =item getfoilcounts()
1573:
1574: =item format_prior_answer()
1575:
1576: =item displayallfoils()
1577:
1578: =item &whichfoils($max,$randomize)
1579:
1580: Randomizes the list of foils.
1581: Respects
1582: - each foils desire to be randomized
1583: - the existance of Concept groups of foils (select 1 foil from each)
1584: - and selects a single correct statement from all possilble true statments
1585: - and limits it to a toal of $max foils
1586:
1587: WARNING: this routine uses the random number generator, it should only
1588: be called once per target, otherwise it can cause randomness changes in
1589: homework problems.
1590:
1591: Arguments
1592: $max - maximum number of foils to select (including the true one)
1593: (so a max of 5 is: 1 true, 4 false)
1594:
1595: $randomize - whether to randomize the listing of foils, by default
1596: will randomize, only if randomize is 'no' will it not
1597:
1598: Returns
1599: $answer - location in the array of the correct answer
1600: @foils - array of foil names in to display order
1601:
1602: =item displayfoils()
1603:
1604: =item displayallanswers()
1605:
1606: =item displayanswers()
1607:
1608: =item start_conceptgroup()
1609:
1610: =item end_conceptgroup()
1611:
1612: =item insert_conceptgroup()
1613:
1614: =item start_foil()
1615:
1616: =item end_foil()
1617:
1618: =item insert_foil()
1619:
1620: =back
1621:
1622: =cut
1623:
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