# The LearningOnline Network with CAPA
# iimage click response style
package Apache::imageresponse;
use strict;
sub BEGIN {
&Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
}
sub start_imageresponse {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
#when in a radiobutton response use these
&Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle'));
my $id = &Apache::response::start_response($parstack,$safeeval);
return '';
}
sub end_imageresponse {
&Apache::response::end_response;
return '';
}
%Apache::response::foilgroup={};
sub start_foilgroup {
%Apache::response::foilgroup={};
return '';
}
sub setrandomnumber {
my $rndseed=&Apache::lonnet::rndseed();
$rndseed=unpack("%32i",$rndseed);
$rndseed=$rndseed
+&Apache::lonnet::numval($Apache::inputtags::part)
+&Apache::lonnet::numval($Apache::inputtags::response['-1']);
srand($rndseed);
return '';
}
sub getfoilcounts {
my ($parstack,$safeeval)=@_;
my $rrargs ='';
if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }
my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);
my $count = $#{ $Apache::response::foilgroup{'names'} };
return ($count,$max);
}
sub whichfoils {
my ($max)=@_;
my @names = @{ $Apache::response::foilgroup{'names'} };
my @whichopt =();
while ((($#whichopt+1) < $max) && ($#names > -1)) {
my $aopt=int rand $#names;
&Apache::lonxml::debug("From $#names elms, picking $aopt");
$aopt=splice(@names,$aopt,1);
&Apache::lonxml::debug("Picked $aopt");
push (@whichopt,$aopt);
}
return @whichopt;
}
sub displayfoils {
my (@whichopt) = @_;
my $result ='';
#<input type=image name=timg0 src=/~walt/kap18/picts/ch1map.gif>
my $name;
my $temp=1;
foreach $name (@whichopt) {
$result.=$Apache::response::foilgroup{"$name.text"}."<br />\n";
my $image=$Apache::response::foilgroup{"$name.image"};
$result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";
$temp++;
}
return $result;
}
sub end_foilgroup {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'grade') {
&setrandomnumber();
my ($count,$max) = &getfoilcounts($parstack,$safeeval);
if ($count>$max) { $count=$max }
&Apache::lonxml::debug("Count is $count from $max");
my @whichopt = &whichfoils($max);
}
if ($target eq 'web') {
$result=&displayfoils(@whichopt);
}
if ($target eq 'grade') {
&gradefoils(@whichopt);
}
return $result;
}
sub start_conceptgroup {
}
sub end_conceptgroup {
}
$Apache::imageresponse::curname='';
sub start_foil {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web' || $target eq 'grade') {
my $args ='';
if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
push @{ $Apache::response::foilgroup{'names'} }, $name;
$Apache::imageresponse::curname=$name;
}
return '';
}
sub end_foil {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
return '';
}
sub start_text {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') {
$Apache::lonxml::redirection--;
}
return '';
}
sub end_text {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') {
my $name = $Apache::imageresponse::curname;
$Apache::response::foilgroup{"$name.text"} = $Apache::lonxml::outputstack;
if ($target eq 'web' ) {
$Apache::lonxml::redirection++;
if ($Apache::lonxml::redirection == 1) {
$Apache::lonxml::outputstack='';
}
}
}
return '';
}
sub start_image {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') { $Apache::lonxml::redirection--; }
return '';
}
sub end_image {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') {
my $name = $Apache::imageresponse::curname;
$Apache::response::foilgroup{"$name.image"} = $Apache::lonxml::outputstack;
if ($target eq 'web' ) {
$Apache::lonxml::redirection++;
if ($Apache::lonxml::redirection == 1) {$Apache::lonxml::outputstack='';}
}
}
return '';
}
sub start_rectangle {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') { $Apache::lonxml::redirection--; }
return '';
}
sub end_rectangle {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
if ($target eq 'web') {
my $name = $Apache::imageresponse::curname;
push ${ $Apache::response::foilgroup{"$name.area"}},"rectangle:$Apache::lonxml::outputstack";
if ($target eq 'web' ) {
$Apache::lonxml::redirection++;
if ($Apache::lonxml::redirection == 1) {$Apache::lonxml::outputstack='';}
}
}
}
1;
__END__
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