Annotation of loncom/homework/imageresponse.pm, revision 1.81
1.58 albertel 1:
1.12 albertel 2: # The LearningOnline Network with CAPA
1.14 albertel 3: # image click response style
4: #
1.81 ! albertel 5: # $Id: imageresponse.pm,v 1.80 2006/11/06 23:44:42 foxr Exp $
1.14 albertel 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
1.25 www 29: #FIXME LATER assumes multiple possible submissions but only one is possible
30: #currently
1.3 albertel 31:
1.1 albertel 32: package Apache::imageresponse;
33: use strict;
1.51 albertel 34: use Image::Magick();
35: use Apache::randomlylabel();
36: use Apache::londefdef();
1.40 albertel 37: use Apache::Constants qw(:common :http);
1.51 albertel 38: use Apache::lonlocal;
1.65 albertel 39: use Apache::lonnet;
1.78 www 40: use lib '/home/httpd/lib/perl/';
41: use LONCAPA;
42:
1.1 albertel 43:
1.16 harris41 44: BEGIN {
1.36 albertel 45: &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
1.1 albertel 46: }
47:
48: sub start_imageresponse {
1.36 albertel 49: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
50: my $result;
51: #when in a radiobutton response use these
1.43 albertel 52: &Apache::lonxml::register('Apache::imageresponse',
53: ('foilgroup','foil','text','image','rectangle',
54: 'polygon','conceptgroup'));
1.36 albertel 55: push (@Apache::lonxml::namespace,'imageresponse');
56: my $id = &Apache::response::start_response($parstack,$safeeval);
1.51 albertel 57: undef(%Apache::response::foilnames);
1.36 albertel 58: if ($target eq 'meta') {
59: $result=&Apache::response::meta_package_write('imageresponse');
1.37 albertel 60: } elsif ($target eq 'analyze') {
61: my $part_id="$Apache::inputtags::part.$id";
62: push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.36 albertel 63: }
64: return $result;
1.1 albertel 65: }
66:
67: sub end_imageresponse {
1.30 albertel 68: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.74 albertel 69:
70: pop(@Apache::lonxml::namespace);
1.30 albertel 71: &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
1.74 albertel 72:
1.30 albertel 73: my $result;
1.74 albertel 74: if ($target eq 'edit') {
75: $result=&Apache::edit::end_table();
1.77 albertel 76: } elsif ($target eq 'tex'
77: && $Apache::lonhomework::type eq 'exam') {
1.74 albertel 78: $result=&Apache::inputtags::exam_score_line($target);
79: }
80:
1.51 albertel 81: undef(%Apache::response::foilnames);
1.74 albertel 82:
83: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
84: $target eq 'tex' || $target eq 'analyze') {
85: &Apache::lonxml::increment_counter(&Apache::response::repetition());
86: }
87: &Apache::response::end_response();
88:
1.30 albertel 89: return $result;
1.1 albertel 90: }
91:
1.20 albertel 92: %Apache::response::foilgroup=();
1.1 albertel 93: sub start_foilgroup {
1.36 albertel 94: %Apache::response::foilgroup=();
95: $Apache::imageresponse::conceptgroup=0;
1.53 albertel 96: &Apache::response::pushrandomnumber();
1.36 albertel 97: return '';
1.1 albertel 98: }
99:
1.2 albertel 100: sub getfoilcounts {
1.36 albertel 101: my ($parstack,$safeeval)=@_;
1.12 albertel 102:
1.36 albertel 103: my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
104: # +1 since instructors will count from 1
105: my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
1.56 albertel 106: #if (&Apache::response::showallfoils()) { $max=$count; }
1.36 albertel 107: return ($count,$max);
1.2 albertel 108: }
109:
110: sub whichfoils {
1.36 albertel 111: my ($max)=@_;
112: if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
113: my @names = @{ $Apache::response::foilgroup{'names'} };
114: my @whichopt =();
115: while ((($#whichopt+1) < $max) && ($#names > -1)) {
116: &Apache::lonxml::debug("Have $#whichopt max is $max");
117: my $aopt;
1.56 albertel 118: # if (&Apache::response::showallfoils()) {
119: # $aopt=0;
120: # } else {
1.36 albertel 121: $aopt=int(&Math::Random::random_uniform() * ($#names+1));
1.56 albertel 122: # }
1.36 albertel 123: &Apache::lonxml::debug("From $#names elms, picking $aopt");
124: $aopt=splice(@names,$aopt,1);
125: &Apache::lonxml::debug("Picked $aopt");
126: push (@whichopt,$aopt);
127: }
128: return @whichopt;
1.2 albertel 129: }
130:
1.40 albertel 131: sub prep_image {
1.42 albertel 132: my ($image,$mode,$name)=@_;
1.40 albertel 133: my $part=$Apache::inputtags::part;
1.41 albertel 134: my $respid=$Apache::inputtags::response['-1'];
135: my $id=&Apache::loncommon::get_cgi_id();
1.49 albertel 136: my (%x,$i);
1.78 www 137: $x{"cgi.$id.BGIMG"}=&escape($image);
1.41 albertel 138: my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
1.40 albertel 139: #draws 2 xs on the image at the clicked location
140: #one in white and then one in red on top of the one in white
1.75 albertel 141: if (defined($x) && $x =~/\S/
142: && defined($y) && $y =~/\S/
143: && !&Apache::response::show_answer()
144: && $mode ne 'answeronly') {
1.40 albertel 145: my $length = 6;
146: my $width = 1;
147: my $extrawidth = 2;
1.48 albertel 148: my $xmin=($x-$length);
149: my $xmax=($x+$length);
150: my $ymin=($y-$length);
151: my $ymax=($y+$length);
152:
1.49 albertel 153: $x{"cgi.$id.OBJTYPE"}.='LINE:';
154: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 155: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49 albertel 156: "FFFFFF",($width+$extrawidth)));
157: $x{"cgi.$id.OBJTYPE"}.='LINE:';
158: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 159: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49 albertel 160: "FFFFFF",($width+$extrawidth)));
161: $x{"cgi.$id.OBJTYPE"}.='LINE:';
162: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 163: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49 albertel 164: "FF0000",($width)));
165: $x{"cgi.$id.OBJTYPE"}.='LINE:';
166: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.58 albertel 167: $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49 albertel 168: "FF0000",($width)));
1.40 albertel 169: }
1.75 albertel 170: if ($mode eq 'answer' || $mode eq 'answeronly') {
1.42 albertel 171: my $width = 1;
172: my $extrawidth = 2;
173: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
174: foreach my $area (@areas) {
1.43 albertel 175: if ($area=~/^rectangle:/) {
1.49 albertel 176: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
177: $i=$x{"cgi.$id.OBJCOUNT"}++;
1.43 albertel 178: my ($x1,$y1,$x2,$y2)=
179: ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.49 albertel 180: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
1.43 albertel 181: ($width+$extrawidth)));
1.49 albertel 182: $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
183: $i=$x{"cgi.$id.OBJCOUNT"}++;
184: $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
1.43 albertel 185: } elsif ($area=~/^polygon:(.*)/) {
1.49 albertel 186: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
187: $i=$x{"cgi.$id.OBJCOUNT"}++;
188: $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
189: $x{"cgi.$id.OBJEXTRA$i"}=$1;
190: $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
191: $i=$x{"cgi.$id.OBJCOUNT"}++;
192: $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
193: $x{"cgi.$id.OBJEXTRA$i"}=$1;
1.43 albertel 194: }
1.42 albertel 195: }
196: }
1.41 albertel 197: &Apache::lonnet::appenv(%x);
198: return $id;
1.40 albertel 199: }
200:
1.2 albertel 201: sub displayfoils {
1.36 albertel 202: my ($target,@whichopt) = @_;
203: my $result ='';
204: my $name;
205: my $temp=1;
206: foreach $name (@whichopt) {
207: $result.=$Apache::response::foilgroup{"$name.text"};
208: &Apache::lonxml::debug("Text is $result");
209: if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
210: my $image=$Apache::response::foilgroup{"$name.image"};
211: &Apache::lonxml::debug("image is $image");
1.40 albertel 212: if ( $target eq 'web' && $image !~ /^http:/ ) {
1.47 albertel 213: $image=&clean_up_image($image);
214: }
1.40 albertel 215: &Apache::lonxml::debug("image is $image");
1.36 albertel 216: if ( &Apache::response::show_answer() ) {
217: if ($target eq 'tex') {
218: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
219: } else {
1.42 albertel 220: my $token=&prep_image($image,'answer',$name);
1.40 albertel 221: $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36 albertel 222: }
223: } else {
224: if ($target eq 'tex') {
225: $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
226: } else {
1.40 albertel 227: my $id=$Apache::inputtags::response['-1'];
228: my $token=&prep_image($image);
229: my $temp=1;
230: $result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
231: "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36 albertel 232: }
233: }
234: $temp++;
235: }
236: return $result;
1.47 albertel 237: }
238:
1.75 albertel 239: sub display_answers {
240: my ($target,$whichopt)=@_;
241:
242: my $result;
243: foreach my $name (@$whichopt) {
244: my $image=$Apache::response::foilgroup{"$name.image"};
245: &Apache::lonxml::debug("image is $image");
246: if ( $target eq 'web' && $image !~ /^http:/ ) {
247: $image = &clean_up_image($image);
248: }
249: my $token=&prep_image($image,'answeronly',$name);
250:
251: $result.=&Apache::response::answer_header('imageresponse');
252: $result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
253: $result.=&Apache::response::answer_footer('imageresponse');
254: }
255: return $result;
256: }
257:
1.47 albertel 258: sub clean_up_image {
259: my ($image)=@_;
260: if ($image =~ /\s*<img\s*/) {
1.50 albertel 261: ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
1.47 albertel 262: if ($image !~ /^http:/) {
263: $image=&Apache::lonnet::hreflocation('',$image);
264: }
265: if (!$image) {
266: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
267: }
268: } else {
269: $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
1.66 foxr 270: &Apache::lonxml::debug("repcopying: $image");
1.64 raeburn 271: if (&Apache::lonnet::repcopy($image) ne 'ok') {
1.47 albertel 272: $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
273: }
274: }
275: return $image;
1.2 albertel 276: }
277:
1.3 albertel 278: sub gradefoils {
1.36 albertel 279: my (@whichopt) = @_;
1.74 albertel 280:
281: my $partid = $Apache::inputtags::part;
282: my $id = $Apache::inputtags::response['-1'];
283:
284: if ($Apache::lonhomework::type eq 'exam') {
285: &Apache::response::scored_response($partid,$id);
286: return;
287: }
288:
1.36 albertel 289: my $x;
290: my $y;
291: my $result;
292: my $temp=1;
293: foreach my $name (@whichopt) {
1.65 albertel 294: $x=$env{"form.HWVAL_$id:$temp.x"};
295: $y=$env{"form.HWVAL_$id:$temp.y"};
1.36 albertel 296: &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
297: if (defined($x) && defined($y) &&
298: defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
299: my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
300: my $grade="INCORRECT";
301: foreach my $area (@areas) {
302: &Apache::lonxml::debug("Area is $area for $name");
303: $area =~ m/([a-z]*):/;
304: &Apache::lonxml::debug("Area of type $1");
305: if ($1 eq 'rectangle') {
306: $grade=&grade_rectangle($area,$x,$y);
1.43 albertel 307: } elsif ($1 eq 'polygon') {
308: $grade=&grade_polygon($area,$x,$y);
1.36 albertel 309: } else {
310: &Apache::lonxml::error("Unknown area style $area");
311: }
312: &Apache::lonxml::debug("Area said $grade");
313: if ($grade eq 'APPROX_ANS') { last; }
314: }
315: &Apache::lonxml::debug("Foil was $grade");
316: if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
317: if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
318: &Apache::lonxml::debug("Question is $result");
319: $temp++;
1.9 albertel 320: }
1.36 albertel 321: }
1.60 albertel 322: my $responsestr="$x:$y";
323: my $part=$Apache::inputtags::part;
324: my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
1.56 albertel 325: if ($result
326: && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
1.60 albertel 327: &Apache::response::handle_previous(\%previous,$result);
328: $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
329: $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
1.74 albertel 330: return;
1.3 albertel 331: }
332:
1.1 albertel 333: sub end_foilgroup {
1.36 albertel 334: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
335: my $result='';
336: my @whichopt;
1.75 albertel 337:
1.38 albertel 338: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 339: $target eq 'analyze' || $target eq 'answer') {
340:
1.36 albertel 341: my ($count,$max) = &getfoilcounts($parstack,$safeeval);
342: if ($count>$max) { $count=$max }
343: &Apache::lonxml::debug("Count is $count from $max");
1.75 albertel 344:
1.36 albertel 345: @whichopt = &whichfoils($max);
1.75 albertel 346:
1.36 albertel 347: if ($target eq 'web' || $target eq 'tex') {
348: $result=&displayfoils($target,@whichopt);
1.81 ! albertel 349: $Apache::lonxml::post_evaluate=0;
1.36 albertel 350: } elsif ($target eq 'grade') {
1.65 albertel 351: if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
1.37 albertel 352: } elsif ( $target eq 'analyze') {
353: &Apache::response::analyze_store_foilgroup(\@whichopt,
354: ['text','image','area']);
1.76 albertel 355: } elsif ($target eq 'answer'
356: && $env{'form.answer_output_mode'} ne 'tex') {
1.75 albertel 357: $result=&display_answers($target,\@whichopt);
1.37 albertel 358: }
1.75 albertel 359:
1.36 albertel 360: } elsif ($target eq 'edit') {
361: $result=&Apache::edit::end_table();
362: }
1.53 albertel 363: &Apache::response::poprandomnumber();
1.36 albertel 364: return $result;
1.1 albertel 365: }
366:
367: sub start_conceptgroup {
1.36 albertel 368: $Apache::imageresponse::conceptgroup=1;
369: %Apache::response::conceptgroup=();
370: return '';
1.1 albertel 371: }
372:
373: sub end_conceptgroup {
1.36 albertel 374: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
375: $Apache::imageresponse::conceptgroup=0;
376: my $result;
1.37 albertel 377: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
378: $target eq 'analyze') {
379: &Apache::response::pick_foil_for_concept($target,
380: ['area','text','image'],
381: \%Apache::hint::image,
382: $parstack,$safeeval);
1.36 albertel 383: } elsif ($target eq 'edit') {
384: $result=&Apache::edit::end_table();
385: }
386: return $result;
1.31 albertel 387: }
388:
389: sub insert_foil {
390: return '
391: <foil>
392: <image></image>
393: <text></text>
394: <rectangle></rectangle>
395: </foil>
396: ';
1.1 albertel 397: }
398:
1.12 albertel 399: $Apache::imageresponse::curname='';
1.1 albertel 400: sub start_foil {
1.36 albertel 401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.67 albertel 402: my $result;
1.37 albertel 403: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 404: $target eq 'analyze' || $target eq 'answer') {
1.36 albertel 405: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.72 albertel 406: if ($name eq "") {
1.71 albertel 407: &Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
1.59 albertel 408: $name=$Apache::lonxml::curdepth;
409: }
1.51 albertel 410: if (defined($Apache::response::foilnames{$name})) {
411: &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
412: }
1.52 albertel 413: $Apache::response::foilnames{$name}++;
1.36 albertel 414: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 415: #&& !&Apache::response::showallfoils()
416: ) {
1.36 albertel 417: push(@{ $Apache::response::conceptgroup{'names'} }, $name);
418: } else {
419: push(@{ $Apache::response::foilgroup{'names'} }, $name);
420: }
421: $Apache::imageresponse::curname=$name;
1.67 albertel 422: } elsif ($target eq 'edit') {
423: $result = &Apache::edit::tag_start($target,$token);
424: $result .= &Apache::edit::text_arg('Name:','name',$token);
425: $result .= &Apache::edit::end_row().
426: &Apache::edit::start_spanning_row();
427: } elsif ($target eq 'modified') {
428: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
429: $safeeval,'name');
430: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
431: }
432: return $result;;
1.1 albertel 433: }
434:
435: sub end_foil {
1.26 albertel 436: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
437: my $result;
438: if ($target eq 'edit') {
439: $result=&Apache::edit::end_table();
440: }
441: return $result;
1.1 albertel 442: }
443:
444: sub start_text {
1.36 albertel 445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
446: my $result='';
1.75 albertel 447: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
448: || $target eq 'answer') {
1.36 albertel 449: &Apache::lonxml::startredirection;
450: } elsif ($target eq 'edit') {
1.73 albertel 451: my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
1.36 albertel 452: $result=&Apache::edit::tag_start($target,$token,'Task Description').
453: &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
454: &Apache::edit::end_row();
455: } elsif ($target eq "modified") {
1.39 albertel 456: $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
1.36 albertel 457: }
458: return $result;
1.1 albertel 459: }
460:
461: sub end_text {
1.36 albertel 462: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
463: my $result;
1.75 albertel 464: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
465: || $target eq 'answer') {
1.36 albertel 466: my $name = $Apache::imageresponse::curname;
467: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 468: #&& !&Apache::response::showallfoils()
469: ) {
1.36 albertel 470: $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
471: } else {
472: $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
473: }
474: } elsif ($target eq 'edit') {
475: $result=&Apache::edit::end_table();
476: }
477: return $result;
1.1 albertel 478: }
479:
480: sub start_image {
1.36 albertel 481: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
482: my $result='';
1.75 albertel 483: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
484: || $target eq 'answer') {
1.36 albertel 485: &Apache::lonxml::startredirection;
486: } elsif ($target eq 'edit') {
1.73 albertel 487: my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
1.36 albertel 488: $Apache::edit::bgimgsrc=$bgimg;
489: $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
490:
491: $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
492: &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
493: $result.=&Apache::edit::browse(undef,'textnode').' ';
494: $result.=&Apache::edit::search(undef,'textnode').
495: &Apache::edit::end_row();
496: } elsif ($target eq "modified") {
1.39 albertel 497: $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
1.36 albertel 498: }
499: return $result;
1.1 albertel 500: }
501:
502: sub end_image {
1.36 albertel 503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
504: my $result;
505: my $name = $Apache::imageresponse::curname;
1.75 albertel 506: if ($target eq 'web' || $target eq 'answer') {
1.62 albertel 507: my $image = &Apache::lonxml::endredirection();
1.36 albertel 508: &Apache::lonxml::debug("original image is $image");
1.37 albertel 509: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 510: #&& !&Apache::response::showallfoils()
511: ) {
1.37 albertel 512: $Apache::response::conceptgroup{"$name.image"} = $image;
513: } else {
514: $Apache::response::foilgroup{"$name.image"} = $image;
515: }
516: } elsif ($target eq 'analyze') {
1.62 albertel 517: my $image = &Apache::lonxml::endredirection();
1.36 albertel 518: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 519: #&& !&Apache::response::showallfoils()
520: ) {
1.36 albertel 521: $Apache::response::conceptgroup{"$name.image"} = $image;
522: } else {
523: $Apache::response::foilgroup{"$name.image"} = $image;
524: }
525: } elsif ($target eq 'edit') {
526: $result=&Apache::edit::end_table();
527: } elsif ($target eq 'tex') {
1.62 albertel 528: my $src = &Apache::lonxml::endredirection();
1.68 foxr 529:
530: # There may be all sorts of whitespace on fore and aft:
531:
1.69 foxr 532: $src =~ s/\s+$//s;
533: $src =~ s/^\s+//s;
1.68 foxr 534:
535: #
536: # Gnuplot e.g. just generates the latex to put inplace.
537: #
538: my $graphinclude;
1.70 foxr 539: if ($src =~ /^%DYNAMICIMAGE/) {
540: # This is needed because the newline is not always passed -> tex.
541: # At present we don't care about the sizing info.
542:
543: my ($commentline, $restofstuff) = split(/\n/, $src);
1.68 foxr 544: $graphinclude = $src;
1.70 foxr 545: $graphinclude =~ s/^$commentline//;
1.68 foxr 546: } else {
547: my ($path,$file) = &Apache::londefdef::get_eps_image($src);
548: my ($height_param,$width_param)=
549: &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
550: $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
551: }
552: $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
1.36 albertel 553: }
554: return $result;
1.1 albertel 555: }
556:
557: sub start_rectangle {
1.36 albertel 558: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
559: my $result='';
1.38 albertel 560: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 561: $target eq 'analyze' || $target eq 'answer') {
1.36 albertel 562: &Apache::lonxml::startredirection;
563: } elsif ($target eq 'edit') {
1.73 albertel 564: my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
1.36 albertel 565: $result=&Apache::edit::tag_start($target,$token,'Rectangle').
566: &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
1.44 albertel 567: &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
1.36 albertel 568: &Apache::edit::end_row();
569: } elsif ($target eq "modified") {
1.44 albertel 570: &Apache::edit::deletecoorddata();
1.39 albertel 571: $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
1.36 albertel 572: }
573: return $result;
1.1 albertel 574: }
575:
1.3 albertel 576: sub grade_rectangle {
1.36 albertel 577: my ($spec,$x,$y) = @_;
578: &Apache::lonxml::debug("Spec is $spec");
1.43 albertel 579: my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.36 albertel 580: &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
581: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
582: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
583: if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
584: return 'APPROX_ANS';
585: }
586: return 'INCORRECT';
1.3 albertel 587: }
588:
1.1 albertel 589: sub end_rectangle {
1.36 albertel 590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
591: my $result;
1.38 albertel 592: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 593: $target eq 'analyze' || $target eq 'answer') {
1.36 albertel 594: my $name = $Apache::imageresponse::curname;
595: my $area = &Apache::lonxml::endredirection;
1.54 albertel 596: $area=~s/\s//g;
1.36 albertel 597: &Apache::lonxml::debug("out is $area for $name");
598: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 599: #&& !&Apache::response::showallfoils()
600: ) {
1.36 albertel 601: push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
602: } else {
603: push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
1.43 albertel 604: }
605: } elsif ($target eq 'edit') {
606: $result=&Apache::edit::end_table();
607: }
608: return $result;
609: }
610:
611: sub start_polygon {
612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
613: my $result='';
614: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 615: $target eq 'analyze' || $target eq 'answer') {
1.43 albertel 616: &Apache::lonxml::startredirection;
617: } elsif ($target eq 'edit') {
1.73 albertel 618: my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
1.43 albertel 619: $result=&Apache::edit::tag_start($target,$token,'Polygon').
620: &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
1.44 albertel 621: &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
1.43 albertel 622: &Apache::edit::end_row();
623: } elsif ($target eq "modified") {
624: $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
625: }
626: return $result;
627: }
628:
629: sub grade_polygon {
630: my ($spec,$x,$y) = @_;
631: &Apache::lonxml::debug("Spec is $spec");
632: $spec=~s/^polygon://;
633: my @polygon;
634: foreach my $coord (split('-',$spec)) {
635: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
636: &Apache::lonxml::debug("x $x y $y");
637: push @polygon, {'x'=>$x,'y'=>$y};
638: }
639: #make end point start point
640: push @polygon, $polygon[0];
641: # cribbed from
642: # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
643: my $crossing = 0; # the crossing number counter
644:
645: # loop through all edges of the polygon
646: for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
647: if ((($polygon[$i]->{'y'} <= $y)
648: && ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
649: ||
650: (($polygon[$i]->{'y'} > $y)
651: && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
652: # compute the actual edge-ray intersect x-coordinate
653: my $vt = ($y - $polygon[$i]->{'y'})
654: / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
655: if ($x < $polygon[$i]->{'x'} + $vt *
656: ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
657: $crossing++; # a valid crossing of y=P.y right of P.x
658: }
659: }
660: }
661:
662: # 0 if even (out), and 1 if odd (in)
663: if ($crossing%2) {
664: return 'APPROX_ANS';
665: } else {
666: return 'INCORRECT';
667: }
668: }
669:
670: sub end_polygon {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
672: my $result;
673: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
1.75 albertel 674: $target eq 'analyze' || $target eq 'answer') {
1.43 albertel 675: my $name = $Apache::imageresponse::curname;
676: my $area = &Apache::lonxml::endredirection;
1.48 albertel 677: $area=~s/\s*//g;
1.43 albertel 678: &Apache::lonxml::debug("out is $area for $name");
679: if ( $Apache::imageresponse::conceptgroup
1.56 albertel 680: #&& !&Apache::response::showallfoils()
681: ) {
1.43 albertel 682: push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
683: } else {
684: push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
1.36 albertel 685: }
686: } elsif ($target eq 'edit') {
687: $result=&Apache::edit::end_table();
688: }
689: return $result;
1.1 albertel 690: }
691: 1;
692: __END__
693:
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