--- loncom/homework/imageresponse.pm 2003/11/10 23:29:27 1.40 +++ loncom/homework/imageresponse.pm 2007/09/25 23:45:33 1.86 @@ -1,7 +1,8 @@ + # The LearningOnline Network with CAPA # image click response style # -# $Id: imageresponse.pm,v 1.40 2003/11/10 23:29:27 albertel Exp $ +# $Id: imageresponse.pm,v 1.86 2007/09/25 23:45:33 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -30,9 +31,15 @@ package Apache::imageresponse; use strict; -use Image::Magick; -use Apache::randomlylabel; +use Image::Magick(); +use Apache::randomlylabel(); +use Apache::londefdef(); use Apache::Constants qw(:common :http); +use Apache::lonlocal; +use Apache::lonnet; +use lib '/home/httpd/lib/perl/'; +use LONCAPA; + BEGIN { &Apache::lonxml::register('Apache::imageresponse',('imageresponse')); @@ -42,25 +49,45 @@ 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','conceptgroup')); + &Apache::lonxml::register('Apache::imageresponse', + ('foilgroup','foil','text','image','rectangle', + 'polygon','conceptgroup')); push (@Apache::lonxml::namespace,'imageresponse'); my $id = &Apache::response::start_response($parstack,$safeeval); + undef(%Apache::response::foilnames); if ($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); + push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} }, + 1); } return $result; } sub end_imageresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - &Apache::response::end_response; - pop @Apache::lonxml::namespace; + + pop(@Apache::lonxml::namespace); &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup')); + my $result; - if ($target eq 'edit') { $result=&Apache::edit::end_table(); } + if ($target eq 'edit') { + $result=&Apache::edit::end_table(); + } elsif ($target eq 'tex' + && $Apache::lonhomework::type eq 'exam') { + $result=&Apache::inputtags::exam_score_line($target); + } + + undef(%Apache::response::foilnames); + + if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || + $target eq 'tex' || $target eq 'analyze') { + &Apache::lonxml::increment_counter(&Apache::response::repetition()); + } + &Apache::response::end_response(); + return $result; } @@ -68,7 +95,7 @@ sub end_imageresponse { sub start_foilgroup { %Apache::response::foilgroup=(); $Apache::imageresponse::conceptgroup=0; - &Apache::response::setrandomnumber(); + &Apache::response::pushrandomnumber(); return ''; } @@ -78,7 +105,7 @@ sub getfoilcounts { 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; } + #if (&Apache::response::showallfoils()) { $max=$count; } return ($count,$max); } @@ -90,11 +117,11 @@ sub whichfoils { while ((($#whichopt+1) < $max) && ($#names > -1)) { &Apache::lonxml::debug("Have $#whichopt max is $max"); my $aopt; - if (&Apache::response::showallfoils()) { - $aopt=0; - } else { +# 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 $aopt"); @@ -104,94 +131,207 @@ sub whichfoils { } sub prep_image { - my ($image)=@_; - my $part=$Apache::inputtags::part; - my $id=$Apache::inputtags::response['-1']; - my $token=$Apache::lonxml::curdepth.'_'.$$; - my $args="BGIMG=".$image; - &Apache::lonxml::debug("args is $args image is $image"); - my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$id.submission"}); + my ($image,$mode,$name)=@_; + + my ($x,$y)= &get_submission($name); + &Apache::lonxml::debug("for $name drawing click at $x and $y"); + &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"}); +} + +sub draw_image { + my ($mode,$image,$x,$y,$areas) = @_; + + my $id=&Apache::loncommon::get_cgi_id(); + + my (%x,$i); + $x{"cgi.$id.BGIMG"}=&escape($image); + #draws 2 xs on the image at the clicked location #one in white and then one in red on top of the one in white - if (defined($x) && defined($y)) { - $args.="&LINECOUNT=4"; + + if (defined($x) && $x =~/\S/ + && defined($y) && $y =~/\S/ + && ($mode eq 'submission' || !&Apache::response::show_answer()) + && $mode ne 'answeronly') { my $length = 6; my $width = 1; my $extrawidth = 2; - $args.="&LINEW0=".($width+$extrawidth); - $args.="&LINEC0=FFFFFF"; - $args.="&LINEX10=".($x-$length)."&LINEY10=".($y-$length); - $args.="&LINEX20=".($x+$length)."&LINEY20=".($y+$length); - $args.="&LINEW1=".($width+$extrawidth); - $args.="&LINEC1=FFFFFF"; - $args.="&LINEX11=".($x-$length)."&LINEY11=".($y+$length); - $args.="&LINEX21=".($x+$length)."&LINEY21=".($y-$length); - $args.="&LINEW2=$width"; - $args.="&LINEC2=FF0000"; - $args.="&LINEX12=".($x-$length)."&LINEY12=".($y-$length); - $args.="&LINEX22=".($x+$length)."&LINEY22=".($y+$length); - $args.="&LINEW3=$width"; - $args.="&LINEC3=FF0000"; - $args.="&LINEX13=".($x-$length)."&LINEY13=".($y+$length); - $args.="&LINEX23=".($x+$length)."&LINEY23=".($y-$length); - } - &Apache::lonxml::debug("args is $args image is $image"); - &Apache::lonnet::appenv(("imagerequest.$token"=> - &Apache::lonnet::escape($args))); - return $token; + my $xmin=($x-$length); + my $xmax=($x+$length); + my $ymin=($y-$length); + my $ymax=($y+$length); + + $x{"cgi.$id.OBJTYPE"}.='LINE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax), + "FFFFFF",($width+$extrawidth))); + $x{"cgi.$id.OBJTYPE"}.='LINE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin), + "FFFFFF",($width+$extrawidth))); + $x{"cgi.$id.OBJTYPE"}.='LINE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax), + "FF0000",($width))); + $x{"cgi.$id.OBJTYPE"}.='LINE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin), + "FF0000",($width))); + } + if ($mode eq 'answer' || $mode eq 'answeronly') { + my $width = 1; + my $extrawidth = 2; + foreach my $area (@{ $areas }) { + if ($area=~/^rectangle:/) { + $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + my ($x1,$y1,$x2,$y2)= + ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/); + $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF", + ($width+$extrawidth))); + $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width)); + } elsif ($area=~/^polygon:(.*)/) { + $x{"cgi.$id.OBJTYPE"}.='POLYGON:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth))); + $x{"cgi.$id.OBJEXTRA$i"}=$1; + $x{"cgi.$id.OBJTYPE"}.='POLYGON:'; + $i=$x{"cgi.$id.OBJCOUNT"}++; + $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width)); + $x{"cgi.$id.OBJEXTRA$i"}=$1; + } + } + } + &Apache::lonnet::appenv(%x); + return $id; } sub displayfoils { my ($target,@whichopt) = @_; my $result =''; - my $name; my $temp=1; - foreach $name (@whichopt) { + my @images; + foreach my $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.="
\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'; - } + $image=&clean_up_image($image); } + push(@images,$image); &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); + my $token=&prep_image($image,'answer',$name); $result.="
\n"; } } else { if ($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.="
\n"; + my $respid=$Apache::inputtags::response['-1']; + my $token=&prep_image($image,'submission',$name); + my $id = "HWVAL_$respid:$temp"; + $result.=''. + '
'. + ''. + ''; } } $temp++; } + if ($target eq 'web') { + &Apache::response::setup_prior_tries_hash(\&format_prior_response, + [\@images,\@whichopt]); + } return $result; } +sub format_prior_response { + my ($mode,$answer,$other_data) = @_; + + my $result; + + # make a copy of the data in the refs + my @images = @{ $other_data->[0] }; + my @foils = @{ $other_data->[1] }; + foreach my $name (@foils) { + my $image = pop(@images); + my ($x,$y) = &get_submission($name,$answer); + my $token = &draw_image('submission',$image,$x,$y); + $result .= + '
'; + } + return $result; +} + +sub display_answers { + my ($target,$whichopt)=@_; + + my $result; + foreach my $name (@$whichopt) { + my $image=$Apache::response::foilgroup{"$name.image"}; + &Apache::lonxml::debug("image is $image"); + if ( $target eq 'web' && $image !~ /^http:/ ) { + $image = &clean_up_image($image); + } + my $token=&prep_image($image,'answeronly',$name); + + $result.=&Apache::response::answer_header('imageresponse'); + $result.=&Apache::response::answer_part('imageresponse',"
\n"); + $result.=&Apache::response::answer_footer('imageresponse'); + } + return $result; +} + +sub clean_up_image { + my ($image)=@_; + if ($image =~ /\s*$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); + $Apache::lonxml::post_evaluate=0; } elsif ($target eq 'grade') { - if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); } + if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); } } elsif ( $target eq 'analyze') { &Apache::response::analyze_store_foilgroup(\@whichopt, ['text','image','area']); + } elsif ($target eq 'answer' + && $env{'form.answer_output_mode'} ne 'tex') { + $result=&display_answers($target,\@whichopt); } + } elsif ($target eq 'edit') { $result=&Apache::edit::end_table(); } + &Apache::response::poprandomnumber(); return $result; } @@ -280,19 +468,37 @@ sub insert_foil { $Apache::imageresponse::curname=''; sub start_foil { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result; if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || - $target eq 'analyze') { + $target eq 'analyze' || $target eq 'answer') { my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); - if ($name eq '') { $name=$Apache::lonxml::curdepth; } + if ($name eq "") { + &Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction."); + $name=$Apache::lonxml::curdepth; + } + if (defined($Apache::response::foilnames{$name})) { + &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique.",$name)); + } + $Apache::response::foilnames{$name}++; if ( $Apache::imageresponse::conceptgroup - && !&Apache::response::showallfoils()) { + #&& !&Apache::response::showallfoils() + ) { push(@{ $Apache::response::conceptgroup{'names'} }, $name); } else { push(@{ $Apache::response::foilgroup{'names'} }, $name); } $Apache::imageresponse::curname=$name; - } - return ''; + } elsif ($target eq 'edit') { + $result = &Apache::edit::tag_start($target,$token); + $result .= &Apache::edit::text_arg('Name:','name',$token); + $result .= &Apache::edit::end_row(). + &Apache::edit::start_spanning_row(); + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args($token,$parstack, + $safeeval,'name'); + if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } + } + return $result;; } sub end_foil { @@ -307,10 +513,11 @@ sub end_foil { sub start_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { + if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' + || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { - my $descr=&Apache::lonxml::get_all_text('/text',$parser); + my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style); $result=&Apache::edit::tag_start($target,$token,'Task Description'). &Apache::edit::editfield($token->[1],$descr,'Text',60,2). &Apache::edit::end_row(); @@ -323,10 +530,12 @@ sub start_text { sub end_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; - if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { + if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' + || $target eq 'answer') { my $name = $Apache::imageresponse::curname; if ( $Apache::imageresponse::conceptgroup - && !&Apache::response::showallfoils() ) { + #&& !&Apache::response::showallfoils() + ) { $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection; } else { $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection; @@ -340,16 +549,18 @@ sub end_text { sub start_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; - if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { + my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures')); + if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' + || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { - my $bgimg=&Apache::lonxml::get_all_text('/image',$parser); + my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style); $Apache::edit::bgimgsrc=$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').' '; + $result.=&Apache::edit::browse(undef,'textnode',undef,$only).' '; $result.=&Apache::edit::search(undef,'textnode'). &Apache::edit::end_row(); } elsif ($target eq "modified") { @@ -362,19 +573,21 @@ sub end_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; my $name = $Apache::imageresponse::curname; - if ($target eq 'web') { - my $image = &Apache::lonxml::endredirection; + if ($target eq 'web' || $target eq 'answer') { + my $image = &Apache::lonxml::endredirection(); &Apache::lonxml::debug("original image is $image"); if ( $Apache::imageresponse::conceptgroup - && !&Apache::response::showallfoils()) { + #&& !&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; + my $image = &Apache::lonxml::endredirection(); if ( $Apache::imageresponse::conceptgroup - && !&Apache::response::showallfoils()) { + #&& !&Apache::response::showallfoils() + ) { $Apache::response::conceptgroup{"$name.image"} = $image; } else { $Apache::response::foilgroup{"$name.image"} = $image; @@ -382,77 +595,31 @@ sub end_image { } elsif ($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.'} '; - } + my $src = &Apache::lonxml::endredirection(); + + # There may be all sorts of whitespace on fore and aft: + + $src =~ s/\s+$//s; + $src =~ s/^\s+//s; + + # + # Gnuplot e.g. just generates the latex to put inplace. + # + my $graphinclude; + if ($src =~ /^%DYNAMICIMAGE/) { + # This is needed because the newline is not always passed -> tex. + # At present we don't care about the sizing info. + + my ($commentline, $restofstuff) = split(/\n/, $src); + $graphinclude = $src; + $graphinclude =~ s/^$commentline//; } 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.'} '; + my ($path,$file) = &Apache::londefdef::get_eps_image($src); + my ($height_param,$width_param)= + &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval); + $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}'; } + $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude; } return $result; } @@ -461,15 +628,16 @@ sub start_rectangle { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || - $target eq 'analyze') { + $target eq 'analyze' || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { - my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser); + my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style); $result=&Apache::edit::tag_start($target,$token,'Rectangle'). &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40). - &Apache::edit::entercoordpair(undef,'textnode'). + &Apache::edit::entercoord(undef,'textnode',undef,undef,'box'). &Apache::edit::end_row(); } elsif ($target eq "modified") { + &Apache::edit::deletecoorddata(); $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser); } return $result; @@ -478,11 +646,7 @@ sub start_rectangle { sub grade_rectangle { my ($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=$4; + my ($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; } @@ -496,18 +660,101 @@ 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') { + $target eq 'analyze' || $target eq 'answer') { my $name = $Apache::imageresponse::curname; my $area = &Apache::lonxml::endredirection; + $area=~s/\s//g; &Apache::lonxml::debug("out is $area for $name"); if ( $Apache::imageresponse::conceptgroup - && !&Apache::response::showallfoils()) { + #&& !&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' || $target eq 'answer') { + &Apache::lonxml::startredirection; + } elsif ($target eq 'edit') { + my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style); + $result=&Apache::edit::tag_start($target,$token,'Polygon'). + &Apache::edit::editline($token->[1],$coords,'Coordinate list',40). + &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon'). + &Apache::edit::end_row(); + } elsif ($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