File:
[LON-CAPA] /
loncom /
homework /
imageresponse.pm
Revision
1.43:
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Fri Jan 9 23:22:19 2004 UTC (20 years, 7 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- polygonal correct areas in an image now allowed
- imagechoice.pl changed to imagechoice.pm (while I converted the code for handling the box and single point case I haven;'t tested them and I haven't yet converted the edit code to try to use it, maybe later tonight unless I do some woodworking instead)
- imagechoice now shows you were you have clicked on the image when doing polygonal selection,
# The LearningOnline Network with CAPA
# image click response style
#
# $Id: imageresponse.pm,v 1.43 2004/01/09 23:22:19 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#FIXME LATER assumes multiple possible submissions but only one is possible
#currently
package Apache::imageresponse;
use strict;
use Image::Magick;
use Apache::randomlylabel;
use Apache::Constants qw(:common :http);
BEGIN {
&Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
}
sub start_imageresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
#when in a radiobutton response use these
&Apache::lonxml::register('Apache::imageresponse',
('foilgroup','foil','text','image','rectangle',
'polygon','conceptgroup'));
push (@Apache::lonxml::namespace,'imageresponse');
my $id = &Apache::response::start_response($parstack,$safeeval);
if ($target eq 'meta') {
$result=&Apache::response::meta_package_write('imageresponse');
} elsif ($target eq 'analyze') {
my $part_id="$Apache::inputtags::part.$id";
push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
}
return $result;
}
sub end_imageresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
&Apache::response::end_response;
pop @Apache::lonxml::namespace;
&Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
my $result;
if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
return $result;
}
%Apache::response::foilgroup=();
sub start_foilgroup {
%Apache::response::foilgroup=();
$Apache::imageresponse::conceptgroup=0;
&Apache::response::setrandomnumber();
return '';
}
sub getfoilcounts {
my ($parstack,$safeeval)=@_;
my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
# +1 since instructors will count from 1
my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
if (&Apache::response::showallfoils()) { $max=$count; }
return ($count,$max);
}
sub whichfoils {
my ($max)=@_;
if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
my @names = @{ $Apache::response::foilgroup{'names'} };
my @whichopt =();
while ((($#whichopt+1) < $max) && ($#names > -1)) {
&Apache::lonxml::debug("Have $#whichopt max is $max");
my $aopt;
if (&Apache::response::showallfoils()) {
$aopt=0;
} else {
$aopt=int(&Math::Random::random_uniform() * ($#names+1));
}
&Apache::lonxml::debug("From $#names elms, picking $aopt");
$aopt=splice(@names,$aopt,1);
&Apache::lonxml::debug("Picked $aopt");
push (@whichopt,$aopt);
}
return @whichopt;
}
sub prep_image {
my ($image,$mode,$name)=@_;
my $part=$Apache::inputtags::part;
my $respid=$Apache::inputtags::response['-1'];
my $id=&Apache::loncommon::get_cgi_id();
my %x;
$x{"cgi.$id.BGIMG"}=$image;
my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
#draws 2 xs on the image at the clicked location
#one in white and then one in red on top of the one in white
if (defined($x) && defined($y)) {
$x{"cgi.$id.LINECOUNT"}=4;
my $length = 6;
my $width = 1;
my $extrawidth = 2;
$x{"cgi.$id.LINE0"}=
join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
"FFFFFF",($width+$extrawidth)));
$x{"cgi.$id.LINE1"}=
join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
"FFFFFF",($width+$extrawidth)));
$x{"cgi.$id.LINE2"}=
join(':',(($x-$length),($y-$length),($x+$length),($y+$length),
"FF0000",($width)));
$x{"cgi.$id.LINE3"}=
join(':',(($x-$length),($y+$length),($x+$length),($y-$length),
"FF0000",($width)));
}
if ($mode eq 'answer') {
my $width = 1;
my $extrawidth = 2;
my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
foreach my $area (@areas) {
if ($area=~/^rectangle:/) {
my ($x1,$y1,$x2,$y2)=
($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
my $i=$x{"cgi.$id.BOXCOUNT"}++;
$x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
($width+$extrawidth)));
$i=$x{"cgi.$id.BOXCOUNT"}++;
$x{"cgi.$id.BOX$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
} elsif ($area=~/^polygon:(.*)/) {
my $i=$x{"cgi.$id.POLYCOUNT"}++;
$x{"cgi.$id.POLYOPT$i"}=join(':',("FFFFFF",($width+$extrawidth)));
$x{"cgi.$id.POLY$i"}=$1;
$i=$x{"cgi.$id.POLYCOUNT"}++;
$x{"cgi.$id.POLYOPT$i"}=join(':',("00FF00",$width));
$x{"cgi.$id.POLY$i"}=$1;
}
}
}
&Apache::lonnet::appenv(%x);
return $id;
}
sub displayfoils {
my ($target,@whichopt) = @_;
my $result ='';
my $name;
my $temp=1;
foreach $name (@whichopt) {
$result.=$Apache::response::foilgroup{"$name.text"};
&Apache::lonxml::debug("Text is $result");
if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
my $image=$Apache::response::foilgroup{"$name.image"};
&Apache::lonxml::debug("image is $image");
if ( $target eq 'web' && $image !~ /^http:/ ) {
$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
if (&Apache::lonnet::repcopy($image) ne OK) {
$image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
}
}
&Apache::lonxml::debug("image is $image");
if ( &Apache::response::show_answer() ) {
if ($target eq 'tex') {
$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
} else {
my $token=&prep_image($image,'answer',$name);
$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
}
} else {
if ($target eq 'tex') {
$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
} else {
my $id=$Apache::inputtags::response['-1'];
my $token=&prep_image($image);
my $temp=1;
$result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
"src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
}
}
$temp++;
}
return $result;
}
sub gradefoils {
my (@whichopt) = @_;
my $x;
my $y;
my $result;
my $id=$Apache::inputtags::response['-1'];
my $temp=1;
foreach my $name (@whichopt) {
$x=$ENV{"form.HWVAL_$id:$temp.x"};
$y=$ENV{"form.HWVAL_$id:$temp.y"};
&Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
if (defined($x) && defined($y) &&
defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
my $grade="INCORRECT";
foreach my $area (@areas) {
&Apache::lonxml::debug("Area is $area for $name");
$area =~ m/([a-z]*):/;
&Apache::lonxml::debug("Area of type $1");
if ($1 eq 'rectangle') {
$grade=&grade_rectangle($area,$x,$y);
} elsif ($1 eq 'polygon') {
$grade=&grade_polygon($area,$x,$y);
} else {
&Apache::lonxml::error("Unknown area style $area");
}
&Apache::lonxml::debug("Area said $grade");
if ($grade eq 'APPROX_ANS') { last; }
}
&Apache::lonxml::debug("Foil was $grade");
if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
&Apache::lonxml::debug("Question is $result");
$temp++;
}
}
$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
return '';
}
sub end_foilgroup {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
my @whichopt;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
my ($count,$max) = &getfoilcounts($parstack,$safeeval);
if ($count>$max) { $count=$max }
&Apache::lonxml::debug("Count is $count from $max");
@whichopt = &whichfoils($max);
if ($target eq 'web' || $target eq 'tex') {
$result=&displayfoils($target,@whichopt);
} elsif ($target eq 'grade') {
if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
} elsif ( $target eq 'analyze') {
&Apache::response::analyze_store_foilgroup(\@whichopt,
['text','image','area']);
}
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
sub start_conceptgroup {
$Apache::imageresponse::conceptgroup=1;
%Apache::response::conceptgroup=();
return '';
}
sub end_conceptgroup {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
$Apache::imageresponse::conceptgroup=0;
my $result;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
&Apache::response::pick_foil_for_concept($target,
['area','text','image'],
\%Apache::hint::image,
$parstack,$safeeval);
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
sub insert_foil {
return '
<foil>
<image></image>
<text></text>
<rectangle></rectangle>
</foil>
';
}
$Apache::imageresponse::curname='';
sub start_foil {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
if ($name eq '') { $name=$Apache::lonxml::curdepth; }
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils()) {
push(@{ $Apache::response::conceptgroup{'names'} }, $name);
} else {
push(@{ $Apache::response::foilgroup{'names'} }, $name);
}
$Apache::imageresponse::curname=$name;
}
return '';
}
sub end_foil {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
sub start_text {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
&Apache::lonxml::startredirection;
} elsif ($target eq 'edit') {
my $descr=&Apache::lonxml::get_all_text('/text',$parser);
$result=&Apache::edit::tag_start($target,$token,'Task Description').
&Apache::edit::editfield($token->[1],$descr,'Text',60,2).
&Apache::edit::end_row();
} elsif ($target eq "modified") {
$result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
}
return $result;
}
sub end_text {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
my $name = $Apache::imageresponse::curname;
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils() ) {
$Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
} else {
$Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
}
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
sub start_image {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
&Apache::lonxml::startredirection;
} elsif ($target eq 'edit') {
my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
$Apache::edit::bgimgsrc=$bgimg;
$Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
$result=&Apache::edit::tag_start($target,$token,'Clickable Image').
&Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
$result.=&Apache::edit::browse(undef,'textnode').' ';
$result.=&Apache::edit::search(undef,'textnode').
&Apache::edit::end_row();
} elsif ($target eq "modified") {
$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
}
return $result;
}
sub end_image {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
my $name = $Apache::imageresponse::curname;
if ($target eq 'web') {
my $image = &Apache::lonxml::endredirection;
&Apache::lonxml::debug("original image is $image");
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils()) {
$Apache::response::conceptgroup{"$name.image"} = $image;
} else {
$Apache::response::foilgroup{"$name.image"} = $image;
}
} elsif ($target eq 'analyze') {
my $image = &Apache::lonxml::endredirection;
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils()) {
$Apache::response::conceptgroup{"$name.image"} = $image;
} else {
$Apache::response::foilgroup{"$name.image"} = $image;
}
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
} elsif ($target eq 'tex') {
my $src = &Apache::lonxml::endredirection;
$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
my $width_param = '';
my $height_param = '';
my $scaling = .3;
my $image = Image::Magick->new;
my $current_figure = $image->Read($src);
$width_param = $image->Get('width') * $scaling;;
$height_param = $image->Get('height') * $scaling;;
undef $image;
my $epssrc = $src;
$epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
if (not -e $epssrc) {
my $localfile = $epssrc;
$localfile =~ s/.*(\/res)/$1/;
my $file;
my $path;
if ($localfile =~ m!(.*)/([^/]*)$!) {
$file = $2;
$path = $1.'/';
}
my $signal_eps = 0;
my @content_directory = &Apache::lonnet::dirlist($path);
for (my $iy=0;$iy<=$#content_directory;$iy++) {
my @tempo_array = split(/&/,$content_directory[$iy]);
$content_directory[$iy] = $tempo_array[0];
if ($file eq $tempo_array[0]) {
$signal_eps = 1;
last;
}
}
if ($signal_eps) {
my $eps_file = &Apache::lonnet::getfile($localfile);
} else {
$localfile = $src;
$localfile =~ s/.*(\/res)/$1/;
my $as = &Apache::lonnet::getfile($src);
}
}
my $file;
my $path;
if ($src =~ m!(.*)/([^/]*)$!) {
$file = $2;
$path = $1.'/';
}
my $newsrc = $src;
$newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
$file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
#do we have any specified size of the picture?
my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);
my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);
my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
if ($TeXwidth ne '') {
$width_param = $TeXwidth;
} elsif ($TeXheight ne '') {
$width_param = $TeXheight/$height_param*$width_param;
} elsif ($width ne '') {
$width_param = $width*$scaling;
}
#where can we find the picture?
if (-e $newsrc) {
if ($path) {
$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
}
} else {
my $temp_file;
my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
$temp_file = Apache::File->new('>>'.$filename);
print $temp_file "$src\n";
$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
}
}
return $result;
}
sub start_rectangle {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
&Apache::lonxml::startredirection;
} elsif ($target eq 'edit') {
my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
$result=&Apache::edit::tag_start($target,$token,'Rectangle').
&Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
&Apache::edit::entercoordpair(undef,'textnode').
&Apache::edit::end_row();
} elsif ($target eq "modified") {
$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
}
return $result;
}
sub grade_rectangle {
my ($spec,$x,$y) = @_;
&Apache::lonxml::debug("Spec is $spec");
my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
&Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
return 'APPROX_ANS';
}
return 'INCORRECT';
}
sub end_rectangle {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
my $name = $Apache::imageresponse::curname;
my $area = &Apache::lonxml::endredirection;
&Apache::lonxml::debug("out is $area for $name");
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils()) {
push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
} else {
push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
}
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
sub start_polygon {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
&Apache::lonxml::startredirection;
} elsif ($target eq 'edit') {
my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
$result=&Apache::edit::tag_start($target,$token,'Polygon').
&Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
&Apache::edit::entercoordpolygon(undef,'textnode').
&Apache::edit::end_row();
} elsif ($target eq "modified") {
$result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
}
return $result;
}
sub grade_polygon {
my ($spec,$x,$y) = @_;
&Apache::lonxml::debug("Spec is $spec");
$spec=~s/^polygon://;
my @polygon;
foreach my $coord (split('-',$spec)) {
my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
&Apache::lonxml::debug("x $x y $y");
push @polygon, {'x'=>$x,'y'=>$y};
}
#make end point start point
push @polygon, $polygon[0];
# cribbed from
# http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
my $crossing = 0; # the crossing number counter
# loop through all edges of the polygon
for (my $i=0; $i<$#polygon; $i++) { # edge from V[i] to V[i+1]
if ((($polygon[$i]->{'y'} <= $y)
&& ($polygon[$i+1]->{'y'} > $y)) # an upward crossing
||
(($polygon[$i]->{'y'} > $y)
&& ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
# compute the actual edge-ray intersect x-coordinate
my $vt = ($y - $polygon[$i]->{'y'})
/ ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
if ($x < $polygon[$i]->{'x'} + $vt *
($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
$crossing++; # a valid crossing of y=P.y right of P.x
}
}
}
# 0 if even (out), and 1 if odd (in)
if ($crossing%2) {
return 'APPROX_ANS';
} else {
return 'INCORRECT';
}
}
sub end_polygon {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
$target eq 'analyze') {
my $name = $Apache::imageresponse::curname;
my $area = &Apache::lonxml::endredirection;
&Apache::lonxml::debug("out is $area for $name");
if ( $Apache::imageresponse::conceptgroup
&& !&Apache::response::showallfoils()) {
push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
} else {
push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
}
} elsif ($target eq 'edit') {
$result=&Apache::edit::end_table();
}
return $result;
}
1;
__END__
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