1: # The LearningOnline Network with CAPA
2: # image click response style
3: #
4: # $Id: imageresponse.pm,v 1.42 2003/11/11 00:39:33 albertel 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
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: #FIXME LATER assumes multiple possible submissions but only one is possible
29: #currently
30:
31: package Apache::imageresponse;
32: use strict;
33: use Image::Magick;
34: use Apache::randomlylabel;
35: use Apache::Constants qw(:common :http);
36:
37: BEGIN {
38: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
39: }
40:
41: sub start_imageresponse {
42: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
43: my $result;
44: #when in a radiobutton response use these
45: &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
46: push (@Apache::lonxml::namespace,'imageresponse');
47: my $id = &Apache::response::start_response($parstack,$safeeval);
48: if ($target eq 'meta') {
49: $result=&Apache::response::meta_package_write('imageresponse');
50: } elsif ($target eq 'analyze') {
51: my $part_id="$Apache::inputtags::part.$id";
52: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
53: }
54: return $result;
55: }
56:
57: sub end_imageresponse {
58: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
59: &Apache::response::end_response;
60: pop @Apache::lonxml::namespace;
61: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
62: my $result;
63: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
64: return $result;
65: }
66:
67: %Apache::response::foilgroup=();
68: sub start_foilgroup {
69: %Apache::response::foilgroup=();
70: $Apache::imageresponse::conceptgroup=0;
71: &Apache::response::setrandomnumber();
72: return '';
73: }
74:
75: sub getfoilcounts {
76: my ($parstack,$safeeval)=@_;
77:
78: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
79: # +1 since instructors will count from 1
80: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
81: if (&Apache::response::showallfoils()) { $max=$count; }
82: return ($count,$max);
83: }
84:
85: sub whichfoils {
86: my ($max)=@_;
87: if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
88: my @names = @{ $Apache::response::foilgroup{'names'} };
89: my @whichopt =();
90: while ((($#whichopt+1) < $max) && ($#names > -1)) {
91: &Apache::lonxml::debug("Have $#whichopt max is $max");
92: my $aopt;
93: if (&Apache::response::showallfoils()) {
94: $aopt=0;
95: } else {
96: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
97: }
98: &Apache::lonxml::debug("From $#names elms, picking $aopt");
99: $aopt=splice(@names,$aopt,1);
100: &Apache::lonxml::debug("Picked $aopt");
101: push (@whichopt,$aopt);
102: }
103: return @whichopt;
104: }
105:
106: sub prep_image {
107: my ($image,$mode,$name)=@_;
108: my $part=$Apache::inputtags::part;
109: my $respid=$Apache::inputtags::response['-1'];
110: my $id=&Apache::loncommon::get_cgi_id();
111: my %x;
112: $x{"cgi.$id.BGIMG"}=$image;
113: my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
114: #draws 2 xs on the image at the clicked location
115: #one in white and then one in red on top of the one in white
116: if (defined($x) && defined($y)) {
117: $x{"cgi.$id.LINECOUNT"}=4;
118: my $length = 6;
119: my $width = 1;
120: my $extrawidth = 2;
121: $x{"cgi.$id.LINE0"}=
122: join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
123: "FFFFFF",($width+$extrawidth)));
124: $x{"cgi.$id.LINE1"}=
125: join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
126: "FFFFFF",($width+$extrawidth)));
127: $x{"cgi.$id.LINE2"}=
128: join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
129: "FF0000",($width)));
130: $x{"cgi.$id.LINE3"}=
131: join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
132: "FF0000",($width)));
133: }
134: if ($mode eq 'answer') {
135: my $width = 1;
136: my $extrawidth = 2;
137: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
138: foreach my $area (@areas) {
139: my ($x1,$y1,$x2,$y2)=
140: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
141: my $i=$x{"cgi.$id.BOXCOUNT"}++;
142: $x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
143: ($width+$extrawidth)));
144: $i=$x{"cgi.$id.BOXCOUNT"}++;
145: $x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
146: }
147: }
148: &Apache::lonnet::appenv(%x);
149: return $id;
150: }
151:
152: sub displayfoils {
153: my ($target,@whichopt) = @_;
154: my $result ='';
155: my $name;
156: my $temp=1;
157: foreach $name (@whichopt) {
158: $result.=$Apache::response::foilgroup{"$name.text"};
159: &Apache::lonxml::debug("Text is $result");
160: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
161: my $image=$Apache::response::foilgroup{"$name.image"};
162: &Apache::lonxml::debug("image is $image");
163: if ( $target eq 'web' && $image !~ /^http:/ ) {
164: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
165: if (&Apache::lonnet::repcopy($image) ne OK) {
166: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
167: }
168: }
169: &Apache::lonxml::debug("image is $image");
170: if ( &Apache::response::show_answer() ) {
171: if ($target eq 'tex') {
172: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
173: } else {
174: my $token=&prep_image($image,'answer',$name);
175: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
176: }
177: } else {
178: if ($target eq 'tex') {
179: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
180: } else {
181: my $id=$Apache::inputtags::response['-1'];
182: my $token=&prep_image($image);
183: my $temp=1;
184: $result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
185: "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
186: }
187: }
188: $temp++;
189: }
190: return $result;
191: }
192:
193: sub gradefoils {
194: my (@whichopt) = @_;
195: my $x;
196: my $y;
197: my $result;
198: my $id=$Apache::inputtags::response['-1'];
199: my $temp=1;
200: foreach my $name (@whichopt) {
201: $x=$ENV{"form.HWVAL_$id:$temp.x"};
202: $y=$ENV{"form.HWVAL_$id:$temp.y"};
203: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
204: if (defined($x) && defined($y) &&
205: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
206: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
207: my $grade="INCORRECT";
208: foreach my $area (@areas) {
209: &Apache::lonxml::debug("Area is $area for $name");
210: $area =~ m/([a-z]*):/;
211: &Apache::lonxml::debug("Area of type $1");
212: if ($1 eq 'rectangle') {
213: $grade=&grade_rectangle($area,$x,$y);
214: } else {
215: &Apache::lonxml::error("Unknown area style $area");
216: }
217: &Apache::lonxml::debug("Area said $grade");
218: if ($grade eq 'APPROX_ANS') { last; }
219: }
220: &Apache::lonxml::debug("Foil was $grade");
221: if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
222: if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
223: &Apache::lonxml::debug("Question is $result");
224: $temp++;
225: }
226: }
227: $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
228: $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
229: return '';
230: }
231:
232: sub end_foilgroup {
233: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
234: my $result='';
235: my @whichopt;
236: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
237: $target eq 'analyze') {
238: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
239: if ($count>$max) { $count=$max }
240: &Apache::lonxml::debug("Count is $count from $max");
241: @whichopt = &whichfoils($max);
242: if ($target eq 'web' || $target eq 'tex') {
243: $result=&displayfoils($target,@whichopt);
244: } elsif ($target eq 'grade') {
245: if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
246: } elsif ( $target eq 'analyze') {
247: &Apache::response::analyze_store_foilgroup(\@whichopt,
248: ['text','image','area']);
249: }
250: } elsif ($target eq 'edit') {
251: $result=&Apache::edit::end_table();
252: }
253: return $result;
254: }
255:
256: sub start_conceptgroup {
257: $Apache::imageresponse::conceptgroup=1;
258: %Apache::response::conceptgroup=();
259: return '';
260: }
261:
262: sub end_conceptgroup {
263: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
264: $Apache::imageresponse::conceptgroup=0;
265: my $result;
266: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
267: $target eq 'analyze') {
268: &Apache::response::pick_foil_for_concept($target,
269: ['area','text','image'],
270: \%Apache::hint::image,
271: $parstack,$safeeval);
272: } elsif ($target eq 'edit') {
273: $result=&Apache::edit::end_table();
274: }
275: return $result;
276: }
277:
278: sub insert_foil {
279: return '
280: <foil>
281: <image></image>
282: <text></text>
283: <rectangle></rectangle>
284: </foil>
285: ';
286: }
287:
288: $Apache::imageresponse::curname='';
289: sub start_foil {
290: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
291: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
292: $target eq 'analyze') {
293: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
294: if ($name eq '') { $name=$Apache::lonxml::curdepth; }
295: if ( $Apache::imageresponse::conceptgroup
296: && !&Apache::response::showallfoils()) {
297: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
298: } else {
299: push(@{ $Apache::response::foilgroup{'names'} }, $name);
300: }
301: $Apache::imageresponse::curname=$name;
302: }
303: return '';
304: }
305:
306: sub end_foil {
307: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
308: my $result;
309: if ($target eq 'edit') {
310: $result=&Apache::edit::end_table();
311: }
312: return $result;
313: }
314:
315: sub start_text {
316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
317: my $result='';
318: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
319: &Apache::lonxml::startredirection;
320: } elsif ($target eq 'edit') {
321: my $descr=&Apache::lonxml::get_all_text('/text',$parser);
322: $result=&Apache::edit::tag_start($target,$token,'Task Description').
323: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
324: &Apache::edit::end_row();
325: } elsif ($target eq "modified") {
326: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
327: }
328: return $result;
329: }
330:
331: sub end_text {
332: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
333: my $result;
334: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
335: my $name = $Apache::imageresponse::curname;
336: if ( $Apache::imageresponse::conceptgroup
337: && !&Apache::response::showallfoils() ) {
338: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
339: } else {
340: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
341: }
342: } elsif ($target eq 'edit') {
343: $result=&Apache::edit::end_table();
344: }
345: return $result;
346: }
347:
348: sub start_image {
349: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
350: my $result='';
351: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
352: &Apache::lonxml::startredirection;
353: } elsif ($target eq 'edit') {
354: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
355: $Apache::edit::bgimgsrc=$bgimg;
356: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
357:
358: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
359: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
360: $result.=&Apache::edit::browse(undef,'textnode').' ';
361: $result.=&Apache::edit::search(undef,'textnode').
362: &Apache::edit::end_row();
363: } elsif ($target eq "modified") {
364: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
365: }
366: return $result;
367: }
368:
369: sub end_image {
370: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
371: my $result;
372: my $name = $Apache::imageresponse::curname;
373: if ($target eq 'web') {
374: my $image = &Apache::lonxml::endredirection;
375: &Apache::lonxml::debug("original image is $image");
376: if ( $Apache::imageresponse::conceptgroup
377: && !&Apache::response::showallfoils()) {
378: $Apache::response::conceptgroup{"$name.image"} = $image;
379: } else {
380: $Apache::response::foilgroup{"$name.image"} = $image;
381: }
382: } elsif ($target eq 'analyze') {
383: my $image = &Apache::lonxml::endredirection;
384: if ( $Apache::imageresponse::conceptgroup
385: && !&Apache::response::showallfoils()) {
386: $Apache::response::conceptgroup{"$name.image"} = $image;
387: } else {
388: $Apache::response::foilgroup{"$name.image"} = $image;
389: }
390: } elsif ($target eq 'edit') {
391: $result=&Apache::edit::end_table();
392: } elsif ($target eq 'tex') {
393: my $src = &Apache::lonxml::endredirection;
394: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
395: my $width_param = '';
396: my $height_param = '';
397: my $scaling = .3;
398: my $image = Image::Magick->new;
399: my $current_figure = $image->Read($src);
400: $width_param = $image->Get('width') * $scaling;;
401: $height_param = $image->Get('height') * $scaling;;
402: undef $image;
403: my $epssrc = $src;
404: $epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
405: if (not -e $epssrc) {
406: my $localfile = $epssrc;
407: $localfile =~ s/.*(\/res)/$1/;
408: my $file;
409: my $path;
410: if ($localfile =~ m!(.*)/([^/]*)$!) {
411: $file = $2;
412: $path = $1.'/';
413: }
414: my $signal_eps = 0;
415: my @content_directory = &Apache::lonnet::dirlist($path);
416: for (my $iy=0;$iy<=$#content_directory;$iy++) {
417: my @tempo_array = split(/&/,$content_directory[$iy]);
418: $content_directory[$iy] = $tempo_array[0];
419: if ($file eq $tempo_array[0]) {
420: $signal_eps = 1;
421: last;
422: }
423: }
424: if ($signal_eps) {
425: my $eps_file = &Apache::lonnet::getfile($localfile);
426: } else {
427: $localfile = $src;
428: $localfile =~ s/.*(\/res)/$1/;
429: my $as = &Apache::lonnet::getfile($src);
430: }
431: }
432: my $file;
433: my $path;
434: if ($src =~ m!(.*)/([^/]*)$!) {
435: $file = $2;
436: $path = $1.'/';
437: }
438: my $newsrc = $src;
439: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
440: $file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
441: #do we have any specified size of the picture?
442: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
443: my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
444: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
445: if ($TeXwidth ne '') {
446: $width_param = $TeXwidth;
447: } elsif ($TeXheight ne '') {
448: $width_param = $TeXheight/$height_param*$width_param;
449: } elsif ($width ne '') {
450: $width_param = $width*$scaling;
451: }
452: #where can we find the picture?
453: if (-e $newsrc) {
454: if ($path) {
455: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
456: }
457: } else {
458: my $temp_file;
459: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
460: $temp_file = Apache::File->new('>>'.$filename);
461: print $temp_file "$src\n";
462: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
463: }
464: }
465: return $result;
466: }
467:
468: sub start_rectangle {
469: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
470: my $result='';
471: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
472: $target eq 'analyze') {
473: &Apache::lonxml::startredirection;
474: } elsif ($target eq 'edit') {
475: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
476: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
477: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
478: &Apache::edit::entercoordpair(undef,'textnode').
479: &Apache::edit::end_row();
480: } elsif ($target eq "modified") {
481: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
482: }
483: return $result;
484: }
485:
486: sub grade_rectangle {
487: my ($spec,$x,$y) = @_;
488: &Apache::lonxml::debug("Spec is $spec");
489: $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;
490: my $x1=$1;
491: my $y1=$2;
492: my $x2=$3;
493: my $y2=$4;
494: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
495: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
496: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
497: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
498: return 'APPROX_ANS';
499: }
500: return 'INCORRECT';
501: }
502:
503: sub end_rectangle {
504: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
505: my $result;
506: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
507: $target eq 'analyze') {
508: my $name = $Apache::imageresponse::curname;
509: my $area = &Apache::lonxml::endredirection;
510: &Apache::lonxml::debug("out is $area for $name");
511: if ( $Apache::imageresponse::conceptgroup
512: && !&Apache::response::showallfoils()) {
513: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
514: } else {
515: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
516: }
517: } elsif ($target eq 'edit') {
518: $result=&Apache::edit::end_table();
519: }
520: return $result;
521: }
522: 1;
523: __END__
524:
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