File:
[LON-CAPA] /
loncom /
homework /
radiobuttonresponse.pm
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1.13:
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Thu Feb 22 00:49:03 2001 UTC (23 years, 6 months ago) by
albertel
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- changed redirection, and output stack to work more intelligently, checkount radiobuttonresponse for a good example, should have to muck with @Apache::lonxml::outputstack and $Apache::lonxml::redirection directly use startredirection and enredirection
# The LearningOnline Network with CAPA
# mutliple choice style responses
# 2/21 Guy
package Apache::radiobuttonresponse;
use strict;
sub BEGIN {
&Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
}
sub start_radiobuttonresponse {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
#when in a radiobutton response use these
&Apache::lonxml::register('Apache::radiobuttonresponse',('foilgroup','foil'));
my $id = &Apache::response::start_response($parstack,$safeeval);
return '';
}
sub end_radiobuttonresponse {
&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($rndseed);
return '';
}
sub end_foilgroup {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target ne 'meta') {
my $name;
&setrandomnumber();
my ($truecnt,$falsecnt,$max) = &getfoilcounts($parstack,$safeeval);
my $count=0;
# we will add in 1 of the true statements
if (($falsecnt+1)>$max) { $count=$max } else { $count=$falsecnt+1; }
my $answer = int(rand ($count));
&Apache::lonxml::debug("Answer is $answer, $count from $max, $falsecnt");
if ($target eq 'web') {
$result=&displayfoils($max,$answer);
} elsif ( $target eq 'grade') {
if ( defined $ENV{'form.submitted'}) {
my $response = $ENV{'form.HWVAL'.$Apache::inputtags::response['-1']};
if ( $response =~ /[^\s]/) {
my $id = $Apache::inputtags::response['-1'];
$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}=$response;
&Apache::lonxml::debug("submitted a $response<br />\n");
if ($response == $answer) {
$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='EXACT_ANS';
} else {
$Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}='INCORRECT';
}
}
}
}
}
return $result;
}
sub getfoilcounts {
my ($parstack,$safeeval)=@_;
my $rrargs ='';
if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }
my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);
my @names = @{ $Apache::response::foilgroup{'names'} };
my $truecnt=0;
my $falsecnt=0;
my $name;
foreach $name (@names) {
if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
$truecnt++;
} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
$falsecnt++;
}
}
return ($truecnt,$falsecnt,$max);
}
sub displayfoils {
my ($max,$answer)=@_;
my @names = @{ $Apache::response::foilgroup{'names'} };
my @truelist;
my @falselist;
my $result;
my $name;
foreach $name (@names) {
#result.="<br /><b>$name</b> is <i> $Apache::response::foilgroup{$name.'.value'} </i>";
if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
push (@truelist,$name);
} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'false') {
push (@falselist,$name);
} elsif ($Apache::response::foilgroup{$name.'.value'} eq 'unused') {
} else {
&Apache::lonxml::error("Unknown state $Apache::response::foilgroup{$name.'.value'} for $name in <foilgroup>");
}
}
my $whichtrue = rand $#truelist;
&Apache::lonxml::debug("Max is $max, From $#truelist elms, picking $whichtrue");
my @whichfalse =();
while ((($#whichfalse+2) < $max) && ($#falselist > -1)) {
my $afalse=rand $#falselist;
&Apache::lonxml::debug("From $#falselist elms, picking $afalse");
$afalse=splice(@falselist,$afalse,1);
&Apache::lonxml::debug("Picked $afalse");
push (@whichfalse,$afalse);
}
splice(@whichfalse,$answer,0,$truelist[$whichtrue]);
&Apache::lonxml::debug("the true statement is $answer");
if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {
foreach $name (@whichfalse) {
$result.="<br />";
if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {
$result.='Correct';
} else {
$result.='Incorrect';
}
$result.=":".$Apache::response::foilgroup{$name.'.text'}."</input>\n";
}
} else {
my $temp=0;
foreach $name (@whichfalse) {
$result.="<br /><input type=\"radio\" name=\"HWVAL$Apache::inputtags::response['-1']\" value=\"$temp\">".$Apache::response::foilgroup{$name.'.text'}."</input>\n";
$temp++;
}
}
return $result."<br />";
}
sub start_foil {
&Apache::lonxml::startredirection;
return '';
}
sub end_foil {
my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
my $foil=&Apache::lonxml::endredirection;
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;
my $value = &Apache::run::run("{$args;".'return $value}',$safeeval);
$Apache::response::foilgroup{"$name.value"} = $value;
$Apache::response::foilgroup{"$name.text"} = $foil;
}
return '';
}
1;
__END__
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