1: # The LearningOnline Network with CAPA
2: # image click response style
3: #
4: # $Id: imageresponse.pm,v 1.36 2003/09/24 19:20:58 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: # July,August 2003 H. K. Ng
29: #
30: #FIXME LATER assumes multiple possible submissions but only one is possible
31: #currently
32:
33: package Apache::imageresponse;
34: use Apache::randomlylabel;
35: use strict;
36: use Image::Magick;
37: use GD;
38:
39: BEGIN {
40: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
41: }
42:
43: sub start_imageresponse {
44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
45: my $result;
46: #when in a radiobutton response use these
47: &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
48: push (@Apache::lonxml::namespace,'imageresponse');
49: my $id = &Apache::response::start_response($parstack,$safeeval);
50: if ($target eq 'meta') {
51: $result=&Apache::response::meta_package_write('imageresponse');
52: }
53: return $result;
54: }
55:
56: sub end_imageresponse {
57: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
58: &Apache::response::end_response;
59: pop @Apache::lonxml::namespace;
60: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
61: my $result;
62: if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
63: return $result;
64: }
65:
66: %Apache::response::foilgroup=();
67: sub start_foilgroup {
68: %Apache::response::foilgroup=();
69: $Apache::imageresponse::conceptgroup=0;
70: &Apache::response::setrandomnumber();
71: return '';
72: }
73:
74: sub getfoilcounts {
75: my ($parstack,$safeeval)=@_;
76:
77: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
78: # +1 since instructors will count from 1
79: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
80: if (&Apache::response::showallfoils()) { $max=$count; }
81: return ($count,$max);
82: }
83:
84: sub whichfoils {
85: my ($max)=@_;
86: if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
87: my @names = @{ $Apache::response::foilgroup{'names'} };
88: my @whichopt =();
89: while ((($#whichopt+1) < $max) && ($#names > -1)) {
90: &Apache::lonxml::debug("Have $#whichopt max is $max");
91: my $aopt;
92: if (&Apache::response::showallfoils()) {
93: $aopt=0;
94: } else {
95: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
96: }
97: &Apache::lonxml::debug("From $#names elms, picking $aopt");
98: $aopt=splice(@names,$aopt,1);
99: &Apache::lonxml::debug("Picked $aopt");
100: push (@whichopt,$aopt);
101: }
102: return @whichopt;
103: }
104:
105: sub displayfoils {
106: my ($target,@whichopt) = @_;
107: my $result ='';
108: my $name;
109: my $temp=1;
110: foreach $name (@whichopt) {
111: $result.=$Apache::response::foilgroup{"$name.text"};
112: &Apache::lonxml::debug("Text is $result");
113: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
114: my $image=$Apache::response::foilgroup{"$name.image"};
115: &Apache::lonxml::debug("image is $image");
116: if ( &Apache::response::show_answer() ) {
117: if ($target eq 'tex') {
118: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
119: } else {
120: $result.="<img src=\"$image\"/> <br />\n";
121: }
122: } else {
123: if ($target eq 'tex') {
124: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
125: } else {
126: $result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";
127: }
128: }
129: $temp++;
130: }
131: return $result;
132: }
133:
134: sub gradefoils {
135: my (@whichopt) = @_;
136: my $x;
137: my $y;
138: my $result;
139: my $id=$Apache::inputtags::response['-1'];
140: my $temp=1;
141: foreach my $name (@whichopt) {
142: $x=$ENV{"form.HWVAL_$id:$temp.x"};
143: $y=$ENV{"form.HWVAL_$id:$temp.y"};
144: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
145: if (defined($x) && defined($y) &&
146: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
147: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
148: my $grade="INCORRECT";
149: foreach my $area (@areas) {
150: &Apache::lonxml::debug("Area is $area for $name");
151: $area =~ m/([a-z]*):/;
152: &Apache::lonxml::debug("Area of type $1");
153: if ($1 eq 'rectangle') {
154: $grade=&grade_rectangle($area,$x,$y);
155: } else {
156: &Apache::lonxml::error("Unknown area style $area");
157: }
158: &Apache::lonxml::debug("Area said $grade");
159: if ($grade eq 'APPROX_ANS') { last; }
160: }
161: &Apache::lonxml::debug("Foil was $grade");
162: if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
163: if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
164: &Apache::lonxml::debug("Question is $result");
165: $temp++;
166: }
167: }
168: $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
169: $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
170: return '';
171: }
172:
173: sub end_foilgroup {
174: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
175: my $result='';
176: my @whichopt;
177: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
178: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
179: if ($count>$max) { $count=$max }
180: &Apache::lonxml::debug("Count is $count from $max");
181: @whichopt = &whichfoils($max);
182: if ($target eq 'web' || $target eq 'tex') {
183: $result=&displayfoils($target,@whichopt);
184: } elsif ($target eq 'grade') {
185: if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
186: }
187: } elsif ($target eq 'edit') {
188: $result=&Apache::edit::end_table();
189: }
190: return $result;
191: }
192:
193: sub start_conceptgroup {
194: $Apache::imageresponse::conceptgroup=1;
195: %Apache::response::conceptgroup=();
196: return '';
197: }
198:
199: sub end_conceptgroup {
200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
201: $Apache::imageresponse::conceptgroup=0;
202: my $result;
203: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
204: if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
205: my @names = @{ $Apache::response::conceptgroup{'names'} };
206: my $pick=int(&Math::Random::random_uniform() * ($#names+1));
207: my $name=$names[$pick];
208: if (defined(@{ $Apache::response::conceptgroup{"$name.area"} })) {
209: push @{ $Apache::response::foilgroup{'names'} }, $name;
210: $Apache::response::foilgroup{"$name.text"} = $Apache::response::conceptgroup{"$name.text"};
211: $Apache::response::foilgroup{"$name.image"} = $Apache::response::conceptgroup{"$name.image"};
212: push(@{ $Apache::response::foilgroup{"$name.area"} }, @{ $Apache::response::conceptgroup{"$name.area"} });
213: my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
214: $Apache::response::foilgroup{"$name.concept"} = $concept;
215: &Apache::lonxml::debug("Selecting $name in $concept");
216: }
217: }
218: } elsif ($target eq 'edit') {
219: $result=&Apache::edit::end_table();
220: }
221: return $result;
222: }
223:
224: sub insert_foil {
225: return '
226: <foil>
227: <image></image>
228: <text></text>
229: <rectangle></rectangle>
230: </foil>
231: ';
232: }
233:
234: $Apache::imageresponse::curname='';
235: sub start_foil {
236: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
237: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
238: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
239: if ($name eq '') { $name=$Apache::lonxml::curdepth; }
240: if ( $Apache::imageresponse::conceptgroup
241: && !&Apache::response::showallfoils()) {
242: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
243: } else {
244: push(@{ $Apache::response::foilgroup{'names'} }, $name);
245: }
246: $Apache::imageresponse::curname=$name;
247: }
248: return '';
249: }
250:
251: sub end_foil {
252: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
253: my $result;
254: if ($target eq 'edit') {
255: $result=&Apache::edit::end_table();
256: }
257: return $result;
258: }
259:
260: sub start_text {
261: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
262: my $result='';
263: if ($target eq 'web' || $target eq 'tex') {
264: &Apache::lonxml::startredirection;
265: } elsif ($target eq 'edit') {
266: my $descr=&Apache::lonxml::get_all_text('/text',$parser);
267: $result=&Apache::edit::tag_start($target,$token,'Task Description').
268: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
269: &Apache::edit::end_row();
270: } elsif ($target eq "modified") {
271: my $descr=&Apache::lonxml::get_all_text('/text',$parser);
272: $result=$token->[4].&Apache::edit::modifiedfield($token);
273: &Apache::lonxml::debug($result);
274: }
275: return $result;
276: }
277:
278: sub end_text {
279: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
280: my $result;
281: if ($target eq 'web' || $target eq 'tex') {
282: my $name = $Apache::imageresponse::curname;
283: if ( $Apache::imageresponse::conceptgroup
284: && !&Apache::response::showallfoils() ) {
285: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
286: } else {
287: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
288: }
289: } elsif ($target eq 'edit') {
290: $result=&Apache::edit::end_table();
291: }
292: return $result;
293: }
294:
295: sub start_image {
296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
297: my $result='';
298: if ($target eq 'web' || $target eq 'tex') {
299: &Apache::lonxml::startredirection;
300: } elsif ($target eq 'edit') {
301: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
302: $Apache::edit::bgimgsrc=$bgimg;
303: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
304:
305: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
306: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
307: $result.=&Apache::edit::browse(undef,'textnode').' ';
308: $result.=&Apache::edit::search(undef,'textnode').
309: &Apache::edit::end_row();
310: } elsif ($target eq "modified") {
311: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
312: $result=$token->[4].&Apache::edit::modifiedfield($token);
313: &Apache::lonxml::debug($result);
314: }
315: return $result;
316: }
317:
318: sub end_image {
319: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
320: my $result;
321: my $name = $Apache::imageresponse::curname;
322: if ($target eq 'web') {
323: my $image = &Apache::lonxml::endredirection;
324: &Apache::lonxml::debug("original image is $image");
325: my $id=$Apache::inputtags::response['-1'];
326: my $temp=1;
327: my $x=$ENV{"form.HWVAL_$id:$temp.x"};
328: my $y=$ENV{"form.HWVAL_$id:$temp.y"};
329: if (defined ($x) && defined ($y)) {
330: &Apache::lonxml::debug("x and y defined as $x,$y");
331: my $currentImage = &Apache::randomlylabel::get_image('/home/httpd/html'.$image,1);
332: if (! defined($currentImage)) {
333: &Apache::lonnet::logthis('Unable to create image object for '.$image);
334: return '';
335: }
336: my $red;
337: if (!($red = $currentImage->colorResolve(255,0,0))) {
338: $red = $currentImage->colorClosestHWB(255,0,0);
339: }
340: my $length = 6;
341: $currentImage->line($x-$length,$y-$length,$x+$length,$y+$length,$red);
342: $currentImage->line($x-$length,$y+$length,$x+$length,$y-$length,$red);
343:
344: my ($nameWOext) = ($image =~ /^.*\/(.*)\..*$/);
345: &Apache::lonxml::debug("graph name $nameWOext");
346: my $webImageName = "/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_".
347: $nameWOext.'.png'; #needs to be more random or specific
348: my $newImageName = '/home/httpd'.$webImageName;
349:
350: my $imgfh = Apache::File->new('>'.$newImageName);
351: print $imgfh $currentImage->png;
352: $image = $webImageName;
353: }
354: &Apache::lonxml::debug("out image is $image");
355: if ( $Apache::imageresponse::conceptgroup
356: && !&Apache::response::showallfoils()) {
357: $Apache::response::conceptgroup{"$name.image"} = $image;
358: } else {
359: $Apache::response::foilgroup{"$name.image"} = $image;
360: }
361: } elsif ($target eq 'edit') {
362: $result=&Apache::edit::end_table();
363: } elsif ($target eq 'tex') {
364: my $src = &Apache::lonxml::endredirection;
365: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
366: my $width_param = '';
367: my $height_param = '';
368: my $scaling = .3;
369: my $image = Image::Magick->new;
370: my $current_figure = $image->Read($src);
371: $width_param = $image->Get('width') * $scaling;;
372: $height_param = $image->Get('height') * $scaling;;
373: undef $image;
374: my $epssrc = $src;
375: $epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
376: if (not -e $epssrc) {
377: my $localfile = $epssrc;
378: $localfile =~ s/.*(\/res)/$1/;
379: my $file;
380: my $path;
381: if ($localfile =~ m!(.*)/([^/]*)$!) {
382: $file = $2;
383: $path = $1.'/';
384: }
385: my $signal_eps = 0;
386: my @content_directory = &Apache::lonnet::dirlist($path);
387: for (my $iy=0;$iy<=$#content_directory;$iy++) {
388: my @tempo_array = split(/&/,$content_directory[$iy]);
389: $content_directory[$iy] = $tempo_array[0];
390: if ($file eq $tempo_array[0]) {
391: $signal_eps = 1;
392: last;
393: }
394: }
395: if ($signal_eps) {
396: my $eps_file = &Apache::lonnet::getfile($localfile);
397: } else {
398: $localfile = $src;
399: $localfile =~ s/.*(\/res)/$1/;
400: my $as = &Apache::lonnet::getfile($src);
401: }
402: }
403: my $file;
404: my $path;
405: if ($src =~ m!(.*)/([^/]*)$!) {
406: $file = $2;
407: $path = $1.'/';
408: }
409: my $newsrc = $src;
410: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
411: $file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
412: #do we have any specified size of the picture?
413: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
414: my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
415: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
416: if ($TeXwidth ne '') {
417: $width_param = $TeXwidth;
418: } elsif ($TeXheight ne '') {
419: $width_param = $TeXheight/$height_param*$width_param;
420: } elsif ($width ne '') {
421: $width_param = $width*$scaling;
422: }
423: #where can we find the picture?
424: if (-e $newsrc) {
425: if ($path) {
426: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
427: }
428: } else {
429: my $temp_file;
430: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
431: $temp_file = Apache::File->new('>>'.$filename);
432: print $temp_file "$src\n";
433: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
434: }
435: }
436: return $result;
437: }
438:
439: sub start_rectangle {
440: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
441: my $result='';
442: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
443: &Apache::lonxml::startredirection;
444: } elsif ($target eq 'edit') {
445: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
446: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
447: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
448: &Apache::edit::entercoordpair(undef,'textnode').
449: &Apache::edit::end_row();
450: } elsif ($target eq "modified") {
451: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
452: $result=$token->[4].&Apache::edit::modifiedfield($token);
453: &Apache::lonxml::debug($result);
454: }
455: return $result;
456: }
457:
458: sub grade_rectangle {
459: my ($spec,$x,$y) = @_;
460: &Apache::lonxml::debug("Spec is $spec");
461: $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;
462: my $x1=$1;
463: my $y1=$2;
464: my $x2=$3;
465: my $y2=$4;
466: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
467: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
468: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
469: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
470: return 'APPROX_ANS';
471: }
472: return 'INCORRECT';
473: }
474:
475: sub end_rectangle {
476: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
477: my $result;
478: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
479: my $name = $Apache::imageresponse::curname;
480: my $area = &Apache::lonxml::endredirection;
481: &Apache::lonxml::debug("out is $area for $name");
482: if ( $Apache::imageresponse::conceptgroup
483: && !&Apache::response::showallfoils()) {
484: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
485: } else {
486: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
487: }
488: } elsif ($target eq 'edit') {
489: $result=&Apache::edit::end_table();
490: }
491: return $result;
492: }
493: 1;
494: __END__
495:
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