Annotation of loncom/interface/statistics/lonstathelpers.pm, revision 1.5
1.1 matthew 1: # The LearningOnline Network with CAPA
2: #
1.5 ! matthew 3: # $Id: lonstathelpers.pm,v 1.4 2004/02/19 20:17:01 matthew Exp $
1.1 matthew 4: #
5: # Copyright Michigan State University Board of Trustees
6: #
7: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
8: #
9: # LON-CAPA is free software; you can redistribute it and/or modify
10: # it under the terms of the GNU General Public License as published by
11: # the Free Software Foundation; either version 2 of the License, or
12: # (at your option) any later version.
13: #
14: # LON-CAPA is distributed in the hope that it will be useful,
15: # but WITHOUT ANY WARRANTY; without even the implied warranty of
16: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17: # GNU General Public License for more details.
18: #
19: # You should have received a copy of the GNU General Public License
20: # along with LON-CAPA; if not, write to the Free Software
21: # 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: =pod
31:
32: =head1 NAME
33:
34: Apache::lonstathelpers - helper routines used by statistics
35:
36: =head1 SYNOPSIS
37:
38: This module provides a place to consolidate much of the statistics
39: routines that are needed across multiple statistics functions.
40:
41: =head1 OVERVIEW
42:
43:
44: =over 4
45:
46: =cut
47:
48: ####################################################
49: ####################################################
50: package Apache::lonstathelpers;
51:
52: use strict;
53: use Apache::lonnet();
54: use Apache::loncommon();
55: use Apache::lonhtmlcommon();
56: use Apache::loncoursedata();
57: use Apache::lonstatistics;
58: use Apache::lonlocal;
59: use HTML::Entities();
60: use Time::Local();
61: use Spreadsheet::WriteExcel();
62:
63: ####################################################
64: ####################################################
65:
66: =pod
67:
68: =item &render_resource($resource)
69:
70: Input: a resource generated from
71: &Apache::loncoursedata::get_sequence_assessment_data().
72:
73: Retunrs: a scalar containing html for a rendering of the problem
74: within a table.
75:
76: =cut
77:
78: ####################################################
79: ####################################################
80: sub render_resource {
81: my ($resource) = @_;
82: ##
83: ## Render the problem
84: my $base;
85: ($base,undef) = ($resource->{'src'} =~ m|(.*/)[^/]*$|);
86: $base = "http://".$ENV{'SERVER_NAME'}.$base;
87: my $rendered_problem =
88: &Apache::lonnet::ssi_body($resource->{'src'});
89: $rendered_problem =~ s/<\s*form\s*/<nop /g;
90: $rendered_problem =~ s|(<\s*/form\s*>)|<\/nop>|g;
91: return '<table bgcolor="ffffff"><tr><td>'.
92: '<base href="'.$base.'" />'.
93: $rendered_problem.
94: '</td></tr></table>';
95: }
1.2 matthew 96:
97: ####################################################
98: ####################################################
99:
100: =pod
101:
102: =item &ProblemSelector($AcceptedResponseTypes)
103:
104: Input: scalar containing regular expression which matches response
105: types to show. '.' will yield all, '(option|radiobutton)' will match
106: all option response and radiobutton problems.
107:
108: Returns: A string containing html for a table which lists the sequences
109: and their contents. A radiobutton is provided for each problem.
110:
111: =cut
112:
113: ####################################################
114: ####################################################
115: sub ProblemSelector {
116: my ($AcceptedResponseTypes) = @_;
117: my $Str;
118: $Str = "\n<table>\n";
119: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
120: next if ($seq->{'num_assess'}<1);
121: my $seq_str = '';
122: foreach my $res (@{$seq->{'contents'}}) {
123: next if ($res->{'type'} ne 'assessment');
124: foreach my $part (@{$res->{'parts'}}) {
125: my $partdata = $res->{'partdata'}->{$part};
126: for (my $i=0;$i<scalar(@{$partdata->{'ResponseTypes'}});$i++){
127: my $respid = $partdata->{'ResponseIds'}->[$i];
128: my $resptype = $partdata->{'ResponseTypes'}->[$i];
129: if ($resptype =~ m/$AcceptedResponseTypes/) {
130: my $value = &make_target_id({symb=>$res->{'symb'},
131: part=>$part,
132: respid=>$respid,
133: resptype=>$resptype});
134: my $checked = '';
135: if ($ENV{'form.problemchoice'} eq $value) {
136: $checked = 'checked ';
137: }
138: my $title = $res->{'title'};
139: if (! defined($title) || $title eq '') {
140: ($title) = ($res->{'src'} =~ m:/([^/]*)$:);
141: }
142: $seq_str .= '<tr><td>'.
143: '<input type="radio" name="problemchoice" value="'.$value.'" '.$checked.'/>'.
144: '</td><td>'.
145: $resptype.'</td><td>'.
146: '<a href="'.$res->{'src'}.'">'.$title.'</a> ';
147: # '<a href="'.$res->{'src'}.'">'.$resptype.' '.$res->{'title'}.'</a> ';
1.5 ! matthew 148: if (scalar(@{$partdata->{'ResponseIds'}}) > 1) {
1.2 matthew 149: $seq_str .= &mt('response').' '.$respid;
150: }
151: $seq_str .= "</td></tr>\n";
152: }
153: }
154: }
155: }
156: if ($seq_str ne '') {
157: $Str .= '<tr><td> </td><td colspan="2"><b>'.$seq->{'title'}.'</b></td>'.
158: "</tr>\n".$seq_str;
159: }
160: }
161: $Str .= "</table>\n";
162: return $Str;
163: }
164:
165: ####################################################
166: ####################################################
167:
168: =pod
169:
170: =item &make_target_id($target)
171:
172: Inputs: Hash ref with the following entries:
173: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
174: $target->{'resptype'}.
175:
176: Returns: A string, suitable for a form parameter, which uniquely identifies
177: the problem, part, and response to do statistical analysis on.
178:
179: Used by Apache::lonstathelpers::ProblemSelector().
180:
181: =cut
182:
183: ####################################################
184: ####################################################
185: sub make_target_id {
186: my ($target) = @_;
187: my $id = &Apache::lonnet::escape($target->{'symb'}).':'.
188: &Apache::lonnet::escape($target->{'part'}).':'.
189: &Apache::lonnet::escape($target->{'respid'}).':'.
190: &Apache::lonnet::escape($target->{'resptype'});
191: return $id;
192: }
193:
194: ####################################################
195: ####################################################
196:
197: =pod
198:
199: =item &get_target_from_id($id)
200:
201: Inputs: $id, a scalar string from Apache::lonstathelpers::make_target_id().
202:
203: Returns: A hash reference, $target, containing the following keys:
204: $target->{'symb'}, $target->{'part'}, $target->{'respid'},
205: $target->{'resptype'}.
206:
207: =cut
208:
209: ####################################################
210: ####################################################
211: sub get_target_from_id {
212: my ($id) = @_;
213: my ($symb,$part,$respid,$resptype) = split(':',$id);
214: return ({ symb =>&Apache::lonnet::unescape($symb),
215: part =>&Apache::lonnet::unescape($part),
216: respid =>&Apache::lonnet::unescape($respid),
217: resptype =>&Apache::lonnet::unescape($resptype)});
218: }
219:
220: ####################################################
221: ####################################################
222:
223: =pod
224:
225: =item &get_prev_curr_next($target)
226:
227: Determine the problem parts or responses preceeding and following the
228: current resource.
229:
230: Inputs: $target (see &Apache::lonstathelpers::get_target_from_id())
231: $AcceptableResponseTypes, regular expression matching acceptable
232: response types,
233: $granularity, either 'part' or 'response'
234:
235: Returns: three hash references, $prev, $curr, $next, which refer to the
236: preceeding, current, or following problem parts or responses, depending
237: on the value of $granularity. Values of undef indicate there is no
238: previous or next part/response. A value of undef for all three indicates
239: there was no match found to the current part/resource.
240:
241: The hash references contain the following keys:
242: symb, part, resource
243:
244: If $granularity eq 'response', the following ADDITIONAL keys will be present:
245: respid, resptype
246:
247: =cut
248:
249: ####################################################
250: ####################################################
251: sub get_prev_curr_next {
252: my ($target,$AcceptableResponseTypes,$granularity) = @_;
253: #
254: # Build an array with the data we need to search through
255: my @Resource;
256: foreach my $seq (&Apache::lonstatistics::Sequences_with_Assess()) {
257: foreach my $res (@{$seq->{'contents'}}) {
258: next if ($res->{'type'} ne 'assessment');
259: foreach my $part (@{$res->{'parts'}}) {
260: my $partdata = $res->{'partdata'}->{$part};
261: if ($granularity eq 'part') {
262: push (@Resource,
263: { symb => $res->{symb},
264: part => $part,
265: resource => $res,
266: } );
267: } elsif ($granularity eq 'response') {
268: for (my $i=0;
269: $i<scalar(@{$partdata->{'ResponseTypes'}});
270: $i++){
271: my $respid = $partdata->{'ResponseIds'}->[$i];
272: my $resptype = $partdata->{'ResponseTypes'}->[$i];
273: next if ($resptype !~ m/$AcceptableResponseTypes/);
274: push (@Resource,
275: { symb => $res->{symb},
276: part => $part,
277: respid => $partdata->{'ResponseIds'}->[$i],
278: resource => $res,
279: resptype => $resptype
280: } );
281: }
282: }
283: }
284: }
285: }
286: #
287: # Get the index of the current situation
288: my $curr_idx;
289: for ($curr_idx=0;$curr_idx<$#Resource;$curr_idx++) {
290: my $curr_item = $Resource[$curr_idx];
291: if ($granularity eq 'part') {
292: if ($curr_item->{'symb'} eq $target->{'symb'} &&
293: $curr_item->{'part'} eq $target->{'part'}) {
294: last;
295: }
296: } elsif ($granularity eq 'response') {
297: if ($curr_item->{'symb'} eq $target->{'symb'} &&
298: $curr_item->{'part'} eq $target->{'part'} &&
299: $curr_item->{'respid'} eq $target->{'respid'} &&
300: $curr_item->{'resptype'} eq $target->{'resptype'}) {
301: last;
302: }
303: }
304: }
305: my $curr_item = $Resource[$curr_idx];
306: if ($granularity eq 'part') {
307: if ($curr_item->{'symb'} ne $target->{'symb'} ||
308: $curr_item->{'part'} ne $target->{'part'}) {
309: # bogus symb - return nothing
310: return (undef,undef,undef);
311: }
312: } elsif ($granularity eq 'response') {
313: if ($curr_item->{'symb'} ne $target->{'symb'} ||
314: $curr_item->{'part'} ne $target->{'part'} ||
315: $curr_item->{'respid'} ne $target->{'respid'} ||
316: $curr_item->{'resptype'} ne $target->{'resptype'}){
317: # bogus symb - return nothing
318: return (undef,undef,undef);
319: }
320: }
321: #
322: # Now just pick up the data we need
323: my ($prev,$curr,$next);
324: if ($curr_idx == 0) {
325: $prev = undef;
326: $curr = $Resource[$curr_idx ];
327: $next = $Resource[$curr_idx+1];
328: } elsif ($curr_idx == $#Resource) {
329: $prev = $Resource[$curr_idx-1];
330: $curr = $Resource[$curr_idx ];
331: $next = undef;
332: } else {
333: $prev = $Resource[$curr_idx-1];
334: $curr = $Resource[$curr_idx ];
335: $next = $Resource[$curr_idx+1];
336: }
337: return ($prev,$curr,$next);
1.4 matthew 338: }
339:
340:
341: #####################################################
342: #####################################################
343:
344: =pod
345:
346: =item analyze_problem_as_student
347:
348: Analyzes a homework problem for a student and returns the correct answer
349: for the student. Attempts to put together an answer for problem types
350: that do not natively support it.
351:
352: Inputs: $resource: a resource object
353: $sname, $sdom, $partid, $respid
354:
355: Returns: $answer
356:
357: =cut
358:
359: #####################################################
360: #####################################################
361: sub analyze_problem_as_student {
362: my ($resource,$sname,$sdom,$partid,$respid) = @_;
363: my $returnvalue;
364: my $url = $resource->{'src'};
365: my $symb = $resource->{'symb'};
366: my $courseid = $ENV{'request.course.id'};
367: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze',
368: 'grade_domain' => $sdom,
369: 'grade_username' => $sname,
370: 'grade_symb' => $symb,
371: 'grade_courseid' => $courseid));
372: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
373: my %Answer=&Apache::lonnet::str2hash($Answ);
374: my $prefix = $partid.'.'.$respid;
375: my $key = $prefix.'.answer';
376: if (exists($Answer{$key})) {
377: my $student_answer = $Answer{$key}->[0];
378: if (! defined($student_answer)) {
379: $student_answer = $Answer{$key}->[1];
380: }
381: $returnvalue = $student_answer;
382: } else {
383: if (exists($Answer{$prefix.'.shown'})) {
384: # The response has foils
385: my %values;
386: while (my ($k,$v) = each(%Answer)) {
387: next if ($k !~ /^$prefix\.foil\.(value|area)\.(.*)$/);
388: my $foilname = $2;
389: $values{$foilname}=$v;
390: }
391: foreach my $foil (@{$Answer{$prefix.'.shown'}}) {
392: if (ref($values{$foil}) eq 'ARRAY') {
393: $returnvalue.=&HTML::Entities::encode($foil).'='.
394: join(',',map {&HTML::Entities::encode($_)} @{$values{$foil}}).'&';
395: } else {
396: $returnvalue.=&HTML::Entities::encode($foil).'='.
397: &HTML::Entities::encode($values{$foil}).'&';
398: }
399: }
400: $returnvalue =~ s/ /\%20/g;
401: chop ($returnvalue);
402: }
403: }
404: return $returnvalue;
405: }
406:
407:
408: ##
409: ## The following is copied from datecalc1.pl, part of the
410: ## Spreadsheet::WriteExcel CPAN module.
411: ##
412: ##
413: ######################################################################
414: #
415: # Demonstration of writing date/time cells to Excel spreadsheets,
416: # using UNIX/Perl time as source of date/time.
417: #
418: # Copyright 2000, Andrew Benham, adsb@bigfoot.com
419: #
420: ######################################################################
421: #
422: # UNIX/Perl time is the time since the Epoch (00:00:00 GMT, 1 Jan 1970)
423: # measured in seconds.
424: #
425: # An Excel file can use exactly one of two different date/time systems.
426: # In these systems, a floating point number represents the number of days
427: # (and fractional parts of the day) since a start point. The floating point
428: # number is referred to as a 'serial'.
429: # The two systems ('1900' and '1904') use different starting points:
430: # '1900'; '1.00' is 1 Jan 1900 BUT 1900 is erroneously regarded as
431: # a leap year - see:
432: # http://support.microsoft.com/support/kb/articles/Q181/3/70.asp
433: # for the excuse^H^H^H^H^H^Hreason.
434: # '1904'; '1.00' is 2 Jan 1904.
435: #
436: # The '1904' system is the default for Apple Macs. Windows versions of
437: # Excel have the option to use the '1904' system.
438: #
439: # Note that Visual Basic's "DateSerial" function does NOT erroneously
440: # regard 1900 as a leap year, and thus its serials do not agree with
441: # the 1900 serials of Excel for dates before 1 Mar 1900.
442: #
443: # Note that StarOffice (at least at version 5.2) does NOT erroneously
444: # regard 1900 as a leap year, and thus its serials do not agree with
445: # the 1900 serials of Excel for dates before 1 Mar 1900.
446: #
447: ######################################################################
448: #
449: # Calculation description
450: # =======================
451: #
452: # 1900 system
453: # -----------
454: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 70 years after 1 Jan 1900.
455: # Of those 70 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
456: # were leap years with an extra day.
457: # Thus there were 17 + 70*365 days = 25567 days between 1 Jan 1900 and
458: # 1 Jan 1970.
459: # In the 1900 system, '1' is 1 Jan 1900, but as 1900 was not a leap year
460: # 1 Jan 1900 should really be '2', so 1 Jan 1970 is '25569'.
461: #
462: # 1904 system
463: # -----------
464: # Unix time is '0' at 00:00:00 GMT 1 Jan 1970, i.e. 66 years after 1 Jan 1904.
465: # Of those 66 years, 17 (1904,08,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68)
466: # were leap years with an extra day.
467: # Thus there were 17 + 66*365 days = 24107 days between 1 Jan 1904 and
468: # 1 Jan 1970.
469: # In the 1904 system, 2 Jan 1904 being '1', 1 Jan 1970 is '24107'.
470: #
471: ######################################################################
472: #
473: # Copyright (c) 2000, Andrew Benham.
474: # This program is free software. It may be used, redistributed and/or
475: # modified under the same terms as Perl itself.
476: #
477: # Andrew Benham, adsb@bigfoot.com
478: # London, United Kingdom
479: # 11 Nov 2000
480: #
481: ######################################################################
482: #-----------------------------------------------------------
483: # calc_serial()
484: #
485: # Called with (up to) 2 parameters.
486: # 1. Unix timestamp. If omitted, uses current time.
487: # 2. GMT flag. Set to '1' to return serial in GMT.
488: # If omitted, returns serial in appropriate timezone.
489: #
490: # Returns date/time serial according to $DATE_SYSTEM selected
491: #-----------------------------------------------------------
492: sub calc_serial {
493: # Use 1900 date system on all platforms other than Apple Mac (for which
494: # use 1904 date system).
495: my $DATE_SYSTEM = ($^O eq 'MacOS') ? 1 : 0;
496: my $time = (defined $_[0]) ? $_[0] : time();
497: my $gmtflag = (defined $_[1]) ? $_[1] : 0;
498: #
499: # Divide timestamp by number of seconds in a day.
500: # This gives a date serial with '0' on 1 Jan 1970.
501: my $serial = $time / 86400;
502: #
503: # Adjust the date serial by the offset appropriate to the
504: # currently selected system (1900/1904).
505: if ($DATE_SYSTEM == 0) { # use 1900 system
506: $serial += 25569;
507: } else { # use 1904 system
508: $serial += 24107;
509: }
510: #
511: unless ($gmtflag) {
512: # Now have a 'raw' serial with the right offset. But this
513: # gives a serial in GMT, which is false unless the timezone
514: # is GMT. We need to adjust the serial by the appropriate
515: # timezone offset.
516: # Calculate the appropriate timezone offset by seeing what
517: # the differences between localtime and gmtime for the given
518: # time are.
519: #
520: my @gmtime = gmtime($time);
521: my @ltime = localtime($time);
522: #
523: # For the first 7 elements of the two arrays, adjust the
524: # date serial where the elements differ.
525: for (0 .. 6) {
526: my $diff = $ltime[$_] - $gmtime[$_];
527: if ($diff) {
528: $serial += _adjustment($diff,$_);
529: }
530: }
531: }
532: #
533: # Perpetuate the error that 1900 was a leap year by decrementing
534: # the serial if we're using the 1900 system and the date is prior to
535: # 1 Mar 1900. This has the effect of making serial value '60'
536: # 29 Feb 1900.
537: #
538: # This fix only has any effect if UNIX/Perl time on the platform
539: # can represent 1900. Many can't.
540: #
541: unless ($DATE_SYSTEM) {
542: $serial-- if ($serial < 61); # '61' is 1 Mar 1900
543: }
544: return $serial;
545: }
546:
547: sub _adjustment {
548: # Based on the difference in the localtime/gmtime array elements
549: # number, return the adjustment required to the serial.
550: #
551: # We only look at some elements of the localtime/gmtime arrays:
552: # seconds unlikely to be different as all known timezones
553: # have an offset of integral multiples of 15 minutes,
554: # but it's easy to do.
555: # minutes will be different for timezone offsets which are
556: # not an exact number of hours.
557: # hours very likely to be different.
558: # weekday will differ when localtime/gmtime difference
559: # straddles midnight.
560: #
561: # Assume that difference between localtime and gmtime is less than
562: # 5 days, then don't have to do maths for day of month, month number,
563: # year number, etc...
564: #
565: my ($delta,$element) = @_;
566: my $adjust = 0;
567: #
568: if ($element == 0) { # Seconds
569: $adjust = $delta/86400; # 60 * 60 * 24
570: } elsif ($element == 1) { # Minutes
571: $adjust = $delta/1440; # 60 * 24
572: } elsif ($element == 2) { # Hours
573: $adjust = $delta/24; # 24
574: } elsif ($element == 6) { # Day of week number
575: # Catch difference straddling Sat/Sun in either direction
576: $delta += 7 if ($delta < -4);
577: $delta -= 7 if ($delta > 4);
578: #
579: $adjust = $delta;
580: }
581: return $adjust;
582: }
583:
584: ###########################################################
585: ###########################################################
586:
587: =pod
588:
589: =item get_problem_data
590:
591: Returns a data structure describing the problem.
592:
593: Inputs: $url
594:
595: Returns: %Partdata
596:
597: =cut
598:
599: ## note: we must force each foil and option to not begin or end with
600: ## spaces as they are stored without such data.
601: ##
602: ###########################################################
603: ###########################################################
604: sub get_problem_data {
605: my ($url) = @_;
606: my $Answ=&Apache::lonnet::ssi($url,('grade_target' => 'analyze'));
607: (my $garbage,$Answ)=split(/_HASH_REF__/,$Answ,2);
608: my %Answer;
609: %Answer=&Apache::lonnet::str2hash($Answ);
610: my %Partdata;
611: foreach my $part (@{$Answer{'parts'}}) {
612: while (my($key,$value) = each(%Answer)) {
613: #
614: # Logging code:
615: if (1) {
616: &Apache::lonnet::logthis($part.' got key "'.$key.'"');
617: if (ref($value) eq 'ARRAY') {
618: &Apache::lonnet::logthis(' @'.join(',',@$value));
619: } else {
620: &Apache::lonnet::logthis(' '.$value);
621: }
622: }
623: # End of logging code
624: next if ($key !~ /^$part/);
625: $key =~ s/^$part\.//;
626: if (ref($value) eq 'ARRAY') {
627: if ($key eq 'options') {
628: $Partdata{$part}->{'_Options'}=$value;
629: } elsif ($key eq 'concepts') {
630: $Partdata{$part}->{'_Concepts'}=$value;
631: } elsif ($key =~ /^concept\.(.*)$/) {
632: my $concept = $1;
633: foreach my $foil (@$value) {
634: $Partdata{$part}->{'_Foils'}->{$foil}->{'_Concept'}=
635: $concept;
636: }
637: } elsif ($key =~ /^(incorrect|answer|ans_low|ans_high)$/) {
638: $Partdata{$part}->{$key}=$value;
639: }
640: } else {
641: if ($key=~ /^foil\.text\.(.*)$/) {
642: my $foil = $1;
643: $Partdata{$part}->{'_Foils'}->{$foil}->{'name'}=$foil;
644: $value =~ s/(\s*$|^\s*)//g;
645: $Partdata{$part}->{'_Foils'}->{$foil}->{'text'}=$value;
646: } elsif ($key =~ /^foil\.value\.(.*)$/) {
647: my $foil = $1;
648: $Partdata{$part}->{'_Foils'}->{$foil}->{'value'}=$value;
649: }
650: }
651: }
652: }
653: return %Partdata;
1.5 ! matthew 654: }
! 655:
! 656: ####################################################
! 657: ####################################################
! 658:
! 659: =pod
! 660:
! 661: =item &limit_by_time()
! 662:
! 663: =cut
! 664:
! 665: ####################################################
! 666: ####################################################
! 667: sub limit_by_time_form {
! 668: my $Starttime_form = '';
! 669: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
! 670: ('limitby_startdate');
! 671: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
! 672: ('limitby_enddate');
! 673: if (! defined($endtime)) {
! 674: $endtime = time;
! 675: }
! 676: if (! defined($starttime)) {
! 677: $starttime = $endtime - 60*60*24*7;
! 678: }
! 679: my $state;
! 680: if (&limit_by_time()) {
! 681: $state = '';
! 682: } else {
! 683: $state = 'disabled';
! 684: }
! 685: my $startdateform = &Apache::lonhtmlcommon::date_setter
! 686: ('Statistics','limitby_startdate',$starttime,undef,undef,$state);
! 687: my $enddateform = &Apache::lonhtmlcommon::date_setter
! 688: ('Statistics','limitby_enddate',$endtime,undef,undef,$state);
! 689: my $Str;
! 690: $Str .= '<script language="Javascript" >';
! 691: $Str .= 'function toggle_limitby_activity(state) {';
! 692: $Str .= ' if (state) {';
! 693: $Str .= ' limitby_startdate_enable();';
! 694: $Str .= ' limitby_enddate_enable();';
! 695: $Str .= ' } else {';
! 696: $Str .= ' limitby_startdate_disable();';
! 697: $Str .= ' limitby_enddate_disable();';
! 698: $Str .= ' }';
! 699: $Str .= '}';
! 700: $Str .= '</script>';
! 701: $Str .= '<fieldset>';
! 702: my $timecheckbox = '<input type="checkbox" name="limit_by_time" ';
! 703: if (&limit_by_time()) {
! 704: $timecheckbox .= ' checked ';
! 705: }
! 706: $timecheckbox .= 'OnChange="javascript:toggle_limitby_activity(this.checked);" ';
! 707: $timecheckbox .= ' />';
! 708: $Str .= '<legend>'.&mt('[_1] Limit by time',$timecheckbox).'</legend>';
! 709: $Str .= &mt('Start Time: [_1]',$startdateform).'<br />';
! 710: $Str .= &mt(' End Time: [_1]',$enddateform).'<br />';
! 711: $Str .= '</fieldset>';
! 712: return $Str;
! 713: }
! 714:
! 715: sub limit_by_time {
! 716: if (exists($ENV{'form.limit_by_time'}) &&
! 717: $ENV{'form.limit_by_time'} ne '' ) {
! 718: return 1;
! 719: } else {
! 720: return 0;
! 721: }
! 722: }
! 723:
! 724: sub get_time_limits {
! 725: my $starttime = &Apache::lonhtmlcommon::get_date_from_form
! 726: ('limitby_startdate');
! 727: my $endtime = &Apache::lonhtmlcommon::get_date_from_form
! 728: ('limitby_enddate');
! 729: return ($starttime,$endtime);
1.2 matthew 730: }
731:
732: ####################################################
733: ####################################################
734:
735: =pod
736:
737: =back
738:
739: =cut
740:
741: ####################################################
742: ####################################################
1.1 matthew 743:
744: 1;
745:
746: __END__
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