# The LON-CAPA image response handler
#
# Image click response style
#
# YEAR=2001
# 2/7,2/9,2/22,3/1,5/4,5/15,5/31,6/2,6/26 Guy Albertelli
# 8/6 Scott Harrison
#FIXME assumes multiple possible submissions but only one is possible currently
package Apache::imageresponse;
use strict;
# ======================================================================= BEGIN
sub BEGIN {
&Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
}
# ======================================================== Start image response
sub start_imageresponse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
#when in a radiobutton response use these
&Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil',
'text','image',
'rectangle',
'conceptgroup'));
push (@Apache::lonxml::namespace,'imageresponse');
my $id = &Apache::response::start_response($parstack,$safeeval);
return '';
}
# ========================================================== End image response
sub end_imageresponse {
&Apache::response::end_response;
pop @Apache::lonxml::namespace;
return '';
}
%Apache::response::foilgroup = {};
# ============================================================ Start foil group
sub start_foilgroup {
%Apache::response::foilgroup = {};
$Apache::imageresponse::conceptgroup = 0;
&Apache::response::setrandomnumber();
return '';
}
# =================================== Get foil counts (returns 2 element array)
sub getfoilcounts {
my ($parstack,$safeeval) = @_;
my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
# +1 since instructors will count from 1
my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
return ($count,$max);
}
# ============================================== Which foils (returns an array)
sub whichfoils {
my ($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 $aopt = int(rand($#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;
}
# ======================================= Display foils (returns scalar string)
sub displayfoils {
my (@whichopt) = @_;
my $result ='';
my $name;
my $temp = 1;
foreach $name (@whichopt) {
$result .= $Apache::response::foilgroup{"$name.text"}."
\n";
my $image = $Apache::response::foilgroup{"$name.image"};
if ($Apache::lonhomework::history{'resource.'.
$Apache::inputtags::part.
'.solved'} =~ /^correct/) {
$result .= "
\n";
} else {
$result .= "
\n";
}
$temp++;
}
return $result;
}
# ================================================================= Grade foils
sub gradefoils {
my (@whichopt) = @_;
my $result = '';
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(@{ $Apache::response::foilgroup{"$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);
} 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"} = $result;
return '';
}
# ======================================= End foil group (return scalar string)
sub end_foilgroup {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
my @whichopt;
if ($target eq 'web' || $target eq 'grade') {
my ($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') {
$result = &displayfoils(@whichopt);
}
if ($target eq 'grade') {
if ( defined $ENV{'form.submitted'}) {
&gradefoils(@whichopt);
}
}
return $result;
}
# ========================================================= Start concept group
sub start_conceptgroup {
$Apache::imageresponse::conceptgroup = 1;
%Apache::response::conceptgroup = {};
return '';
}
# =========================================================== End concept group
sub end_conceptgroup {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
$Apache::imageresponse::conceptgroup = 0;
if ($target eq 'web' || $target eq 'grade') {
if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
my @names = @{ $Apache::response::conceptgroup{'names'} };
my $pick = int(rand($#names+1));
my $name = $names[$pick];
if (defined(@{ $Apache::response::conceptgroup{"$name.area"} })) {
push @{ $Apache::response::foilgroup{'names'} }, $name;
$Apache::response::foilgroup{"$name.text"} =
$Apache::response::conceptgroup{"$name.text"};
$Apache::response::foilgroup{"$name.image"} =
$Apache::response::conceptgroup{"$name.image"};
push(@{ $Apache::response::foilgroup{"$name.area"} },
@{ $Apache::response::conceptgroup{"$name.area"} });
my $concept = &Apache::lonxml::get_param('concept',$parstack,
$safeeval);
$Apache::response::foilgroup{"$name.concept"} = $concept;
&Apache::lonxml::debug("Selecting $name in $concept");
}
}
}
return '';
}
$Apache::imageresponse::curname = '';
# ================================================================== Start foil
sub start_foil {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web' || $target eq 'grade') {
my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
if ($name eq '') { $name=$Apache::lonxml::curdepth; }
if ( $Apache::imageresponse::conceptgroup ) {
push(@{ $Apache::response::conceptgroup{'names'} }, $name);
} else {
push(@{ $Apache::response::foilgroup{'names'} }, $name);
}
$Apache::imageresponse::curname=$name;
}
return '';
}
# ==================================================================== End foil
sub end_foil {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
return '';
}
# ================================================================== Start text
sub start_text {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web') { &Apache::lonxml::startredirection; }
return '';
}
# ==================================================================== End text
sub end_text {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web') {
my $name = $Apache::imageresponse::curname;
if ( $Apache::imageresponse::conceptgroup ) {
$Apache::response::conceptgroup{"$name.text"} =
&Apache::lonxml::endredirection;
} else {
$Apache::response::foilgroup{"$name.text"} =
&Apache::lonxml::endredirection;
}
}
return '';
}
# ================================================================= Start image
sub start_image {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web') { &Apache::lonxml::startredirection; }
return '';
}
# =================================================================== End image
sub end_image {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web') {
my $name = $Apache::imageresponse::curname;
my $image = &Apache::lonxml::endredirection;
&Apache::lonxml::debug("out is $image");
if ( $Apache::imageresponse::conceptgroup ) {
$Apache::response::conceptgroup{"$name.image"} = $image;
} else {
$Apache::response::foilgroup{"$name.image"} = $image;
}
}
return '';
}
# ============================================================= Start rectangle
sub start_rectangle {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web' || $target eq 'grade') {
&Apache::lonxml::startredirection;
}
return '';
}
# ============================================================= Grade rectangle
sub grade_rectangle {
my ($spec,$x,$y) = @_;
&Apache::lonxml::debug("Spec is $spec");
$spec =~ m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;
my $x1 = $1;
my $y1 = $2;
my $x2 = $3;
my $y2 = $4;
&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 => $x1) { if ($x <= $x2) { if ($y => $y1) {
if ($y <= $y2) { return 'APPROX_ANS'; } } } }
return 'INCORRECT';
}
# =============================================================== End rectangle
sub end_rectangle {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
if ($target eq 'web' || $target eq 'grade') {
my $name = $Apache::imageresponse::curname;
my $area = &Apache::lonxml::endredirection;
&Apache::lonxml::debug("out is $area for $name");
if ( $Apache::imageresponse::conceptgroup ) {
push @{ $Apache::response::conceptgroup{"$name.area"} },
"rectangle:$area";
} else {
push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
}
}
return '';
}
1;
__END__