--- loncom/homework/radiobuttonresponse.pm 2012/01/20 13:26:34 1.154 +++ loncom/homework/radiobuttonresponse.pm 2012/02/10 00:26:42 1.155 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # mutliple choice style responses # -# $Id: radiobuttonresponse.pm,v 1.154 2012/01/20 13:26:34 raeburn Exp $ +# $Id: radiobuttonresponse.pm,v 1.155 2012/02/10 00:26:42 foxr Exp $ # # Copyright Michigan State University Board of Trustees # @@ -33,14 +33,22 @@ use HTML::Entities(); use Apache::lonlocal; use Apache::lonnet; use Apache::response; +use Apache::caparesponse; my $default_bubbles_per_line = 10; +my @alphabet = ( 'A' .. 'Z' ); # Foil labels. + + BEGIN { &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse')); } +#--------------------------------------------------------------------------- +# +# Generic utility subs. + sub bubble_line_count { my ($numfoils, $bubbles_per_line) = @_; my $bubble_lines; @@ -53,6 +61,10 @@ sub bubble_line_count { } + +#------------------------------------------------------------------------------ +# +# XML handlers. sub start_radiobuttonresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; @@ -90,27 +102,30 @@ sub start_radiobuttonresponse { $safeeval,'max', 'randomize','direction'); if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } - } elsif ($target eq 'tex') { - my $type=&Apache::lonxml::get_param('TeXtype',$parstack,$safeeval, - undef,0); - if ($type eq '1') { - $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}'; - } elsif ($type eq 'A') { - $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}'; - } elsif ($type eq 'a') { - $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}'; - } elsif ($type eq 'i') { - $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}'; - } else { - $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}'; - } - if($env{'form.pdfFormFields'} eq 'yes' && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') { - $result .= '\begin{itemize}'; - } else { - $result .= '\begin{enumerate}'; + + } elsif ( $target eq 'tex' ) { + my $type = + &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef, + 0 ); + if ( $type eq '1' ) { + $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}'; + } + elsif ( $type eq 'A' ) { + $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}'; + } + elsif ( $type eq 'a' ) { + $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}'; + } + elsif ( $type eq 'i' ) { + $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}'; } - } elsif ($target eq 'analyze') { - my $part_id="$Apache::inputtags::part.$id"; + else { + $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}'; + } + + } + elsif ( $target eq 'analyze' ) { + my $part_id = "$Apache::inputtags::part.$id"; $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse'; push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id); } @@ -120,13 +135,8 @@ sub start_radiobuttonresponse { sub end_radiobuttonresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; - if ($target eq 'edit') { $result=&Apache::edit::end_table(); } - if ($target eq 'tex' ) { - if($env{'form.pdfFormFields'} eq 'yes' and $Apache::inputtags::status[-1] eq 'CAN_ANSWER') { - $result .= '\end{itemize}'; - } else { - $result .= '\end{enumerate}'; - } + if ( $target eq 'edit' ) { + $result = &Apache::edit::end_table(); } &Apache::response::end_response; pop @Apache::lonxml::namespace; @@ -223,6 +233,7 @@ sub end_foilgroup { my $part = $Apache::inputtags::part; my $bubbles_per_line = &getbubblesnum($part,$id); + if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze') { my $style = $Apache::lonhomework::type; @@ -285,7 +296,6 @@ sub end_foilgroup { } return $result; } - sub getbubblesnum { my ($part,$id) = @_; my $bubbles_per_line; @@ -328,112 +338,313 @@ sub format_prior_answer { } -sub displayallfoils { - my ($direction, $target)=@_; - my $result; - &Apache::lonxml::debug("survey style display"); - my @names; - if ( $Apache::response::foilgroup{'names'} ) { - @names= @{ $Apache::response::foilgroup{'names'} }; - } - my $temp=0; - my $i =0; - my $id=$Apache::inputtags::response['-1']; - my $part=$Apache::inputtags::part; - my ($lastresponse,$newvariation,$showanswer); - if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') || - ($Apache::lonhomework::type eq 'randomizetry')) && - ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) { - if ($env{'form.'.$part.'.rndseed'} ne - $Apache::lonhomework::history{"resource.$part.rndseed"}) { +## +# Return the last survey response. The logic is slightly different than that of +# get_last_responses. TODO: See if there are chunks of code betweenthis and +# get_last_reponses that are common and can be factored. +# +# @param $part - Problem part under consideration. +# @param $showanswer - True if answers should be shown. +# @param $id - Problem id. +# +# @return hash reference. +# @retval reference to the has indexed by answer selection that +# indicates the most recent answer. +# +sub get_last_survey_response { + my ($part, $showanswer, $id) = @_; + + my $newvariation; + my $lastresponse; # stringified last response. + + if ( + ( + ( + $Apache::lonhomework::history{"resource.$part.type"} eq + 'randomizetry' + ) + || ( $Apache::lonhomework::type eq 'randomizetry' ) + ) + && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' ) + ) + { + if ( $env{ 'form.' . $part . '.rndseed' } ne + $Apache::lonhomework::history{"resource.$part.rndseed"} ) + { $newvariation = 1; } } $showanswer = &Apache::response::show_answer(); - unless ((($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') || ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) && (defined($env{'form.grade_symb'})) || - ($newvariation && !$showanswer)) { - $lastresponse = - $Apache::lonhomework::history{"resource.$part.$id.submission"}; + unless ( + ( + ( + $Apache::lonhomework::history{"resource.$part.type"} eq + 'anonsurvey' + ) + || ( $Apache::lonhomework::history{"resource.$part.type"} eq + 'anonsurveycred' ) + ) + && ( defined( $env{'form.grade_symb'} ) ) + || ( $newvariation && !$showanswer ) + ) + { + $lastresponse = + $Apache::lonhomework::history{"resource.$part.$id.submission"}; + } + my %lastresponse = &Apache::lonnet::str2hash($lastresponse); + + + return \%lastresponse; + +} +## +# Removes the names from a foil group that are marked as unused. +# +# @param $names - reference to the array of names to filter. +# +# @return arrayref +# @retval reference to the filtered array. +# +sub remove_unused { + my ($names) = @_; + my @result; + + foreach my $name (@{$names}) { + if ($Apache::response::foilgroup{$name . '.value'} ne 'unused') { + push(@result, $name); + } + } + return \@result; +} +## +# Displays all foils in a survey type problem for HTML rendition. +# TODO: See if there is any logic in this sub that can be shared +# with display_foils_html +# +# @param $names - ref to array of names of the foils to display. +# @param $part - Problem part number. +# @param $showanswer - If true, show the answers. +# @param $lastresponse - Ref to the last response hash. +# @param $direction - Display direction of the radiobuttons. +# +# @return string +# @retval HTML required to display the resource in a browser. +# +sub display_survey_html { + my ($names, $part, $showanswer, $lastresponse, $direction) = @_; + my $result; + + # Figure out a few fragments of html that depend onthe + # orientation of the radiobuttons: + # closing_html - HTML to emit at the end of the resource. + # pre_foil - HTML to emit prior to each foil. + # post_foil - HTML to emit following each foil. + # + # The opening HTML is just added to the $result now + # + # Figuring these outin advance compresses the loop over foils into something + # pretty simple: + # + # NOTE: There's probably a really cool way to do this with style sheets + # and picking the selector based on the orientation, if someone wants to puzzle + # that out. In that case, probably the whole thing lives in a
and each + # foil lives in a

+ # + + + my ($opening_html, $closing_html, $pre_foil, $post_foil) = + &html_direction_fragments($direction); + + $result = $opening_html; + + # Different rendering depending on whether answers are shown: + # I played with different factorings but this seems the most concise/clear... + # although I don't like the $showanswer conditino inside the loop. Other things I tried + # - two loops..much longer code..no gain in clarity. + # - Using a visitor patttern passing it the rendering code chunklets and + # an anonymous hash reference for state data etc. Very cool but + # quite a bit more code and quite a bit less clear. + + my $temp = 0; + foreach my $name (@{$names}) { + $result .= $pre_foil; + + if ($showanswer) { + my $foiltext = $Apache::response::foilgroup{$name . '.text'}; + + # Bold the prior response: + + if (defined($lastresponse->{$name})) { + $result .= '' . $foiltext . ''; + } else { + $result .= $foiltext; + } + } else { + $result .= &html_radiobutton( + $part, $Apache::inputtags::response['-1'], $name, $lastresponse, $temp + ); + } + + $result .= $post_foil; + $temp++; } - if ($direction eq 'horizontal') { $result.=''; } - my %lastresponse=&Apache::lonnet::str2hash($lastresponse); + + + $result .= $closing_html; + return $result; + +} + +## +# Generate LaTeX for surveys. +# +# @param $names - names of the foils to display. +# @param $showanswer - flag that is true to display answers. +# @param $lastresponse - Reference to a hash the indicates the last response. +# @param $direction - Orientation of foils ('horiztonal' or otherwise). +# @param $venv - LaTeX name for vertical env. +# +# @return string +# @retval LaTeX rendering of the survey question. + +sub latex_survey { + my ($names, $showanswer, $lastresponse, $direction, $venv) = @_; + + my $result; if ($showanswer) { - foreach my $name (@names) { - if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') { - if (($direction eq 'horizontal') && ($target ne 'tex')) { - $result.=""; } + $result .= "\\begin{$venv}"; + foreach my $name (@{$names}) { + + + $result .= '\item \vskip -2mm '; + + if ( defined( $lastresponse->{$name} ) ) { + $result .= '}'; } + $result .= $Apache::response::foilgroup{ $name . '.text' } . ' '; } + $result .= "\\end{$venv}"; + + } elsif ( $env{'form.pdfFormFields'} eq 'yes' + && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') { + $result .= &display_pdf_form($names, $direction, $venv); } else { - foreach my $name (@names) { - if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') { - if ($direction eq 'horizontal') { - $result.=""; } - } else { - $result.='\vskip 0 mm '; - } + + $result .= '\vskip 0 mm '; } - } + $result .= "\\end{$venv}"; + } } - - if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.='
"; - } else { - if ($target eq 'tex') { - $result .= '\item \vskip -2mm '; - } else { - $result.="
"; - } - } - if (defined($lastresponse{$name})) { - if ($target eq 'tex') { - $result .= '}'; - } else { - $result.=''; - } - } - $result .= $Apache::response::foilgroup{$name.'.text'}; - if (defined($lastresponse{$name}) && ($target ne 'tex')) { - $result.=''; - } - if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.="		"; - } else { - if ($target eq 'tex') { - if($env{'form.pdfFormFields'} eq 'yes' && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') { - my $fieldname = $env{'request.symb'}.'&part_'. $Apache::inputtags::part - .'&radiobuttonresponse'.'&HWVAL_'.$Apache::inputtags::response['-1']; - $result .= '\item[{'.&Apache::lonxml::print_pdf_radiobutton($fieldname,$temp).'}]' - .$Apache::response::foilgroup{$name.'.text'}."\n"; - } else { - $result .= '\item \vskip -2mm '; - } - } else { - $result.="
"; - } - } - if ($target eq 'tex') { - if($env{'form.pdfFormFields'} ne 'yes' or $Apache::inputtags::status[-1] ne 'CAN_ANSWER') { - $result .= '$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\'; #' stupid emacs - } - $i++; - } else { - $result .= '
'; } return $result; } +## +# Figure out the LaTeX environment in which to wrap the LaTeX vertical output. +# +# @return string +# @retval the environment name. The LaTeX should be wrapped a +# \begin{retval} \end{retval} pair. +# +sub latex_vertical_environment { + if ($env{'form.pdfFormFields'} eq 'yes' + && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') { + return 'itemize'; + } else { + return 'enumerate'; + } +} + +## +# Figure out the key html fragments that depend on the rendering direction: +# +# @param $direction - 'horizontal' for horizontal direction. +# +# @return list +# @retval (part_start, part_end, foil_start, foil_end) +# Where: +# - part_start is the HTML to emit at the start of the part. +# - part_end is the HTML to emit at the end of the part. +# - foil_start is the HTML to emit prior to each foil. +# - foil_end is the HTML to emit after each foil +# +sub html_direction_fragments { + my $direction = shift; + if ($direction eq 'horizontal') { + return ('', '
', '', ''); + } else { + return ('', '
', '
', ''); + } +} +## +# +# Displays all the foils of a problem in a format suitable for +# surveys, surveys for credit, anonymous surveys and anonymous surveys for credit. +# +# @param $direction - Display direction of the choices ('horiztonal' or not). +# @param $target - Rendering target. +# +# @return string +# @retval Text that renders for the selected target. +# +sub displayallfoils{ + my ( $direction, $target ) = @_; + my $result; + &Apache::lonxml::debug("survey style display"); + + my @names; + + if ( $Apache::response::foilgroup{'names'} ) { + @names = @{ $Apache::response::foilgroup{'names'} }; + } + + + my $id = $Apache::inputtags::response['-1']; + my $part = $Apache::inputtags::part; + + my $showanswer = &Apache::response::show_answer(); + my $lastresponse = &get_last_survey_response($part, $showanswer, $id); + my $used_names = &remove_unused(\@names); + + + if ($target ne 'tex') { + $result .= &display_survey_html( + $used_names, $part, $showanswer, $lastresponse, $direction + ); + } else { + + my $vertical_env = &latex_vertical_environment(); + $result .= &latex_survey( + $used_names, $showanswer, $lastresponse, $direction, $vertical_env + ); + + } + return $result; +} sub whichfoils { my ($max,$randomize)=@_; @@ -583,152 +794,430 @@ sub whichfoils { return ($answer,@whichfalse); } -sub displayfoils { - my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_; +## +# Return a list of foil texts given foil names. +# +# @param $whichfoils - Reference to a list of foil names. +# +# @return array +# @retval foil texts +# +sub get_foil_texts { + my ($whichfoils) = @_; + my @foil_texts; + + foreach my $name (@{$whichfoils}) { + push(@foil_texts, $Apache::response::foilgroup{$name . '.text'}); + } + return @foil_texts; +} + +## +# Generate the HTML for a single html foil. +# @param $part - The part for which the response is being generated. +# @param $fieldname - The basename of the radiobutton field +# @param $name - The foilname. +# @param $last_responses - Reference to a hash that holds the most recent +# responses. +# @param $value - radiobutton value. +# +# @return text +# @retval The generated html. +# +sub html_radiobutton { + my ($part, $fieldname, $name, $last_responses, $value) = @_; + + my $result=''; + + return $result; + +} +## +# Return a reference to the last response hash. This hash has exactly +# one or zero entries. The one entry is keyed by the foil 'name' of +# the prior response +# +# @param $part - Number of the problem part. +# +# @return reference to a hash. +# @retval see above. +# +sub get_last_response { + my ($part) = @_; + + my $id = $Apache::inputtags::response['-1']; + my ( $lastresponse, $newvariation ); + + if ((( $Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') + || ( $Apache::lonhomework::type eq 'randomizetry' ) + ) + && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' ) + ) + { + + if ( $env{ 'form.' . $part . '.rndseed' } ne + $Apache::lonhomework::history{"resource.$part.rndseed"} ) + { + $newvariation = 1; + } + } + unless ($newvariation) { + $lastresponse = + $Apache::lonhomework::history{"resource.$part.$id.submission"}; + } + my %lastresponse = &Apache::lonnet::str2hash($lastresponse); + + return \%lastresponse; +} + +## +# Display foils in html rendition.: +# +# @param $whichfoils - Set of foils to display. +# @param $target - Rendition target...there are several html targets. +# @param $direction - 'horizontal' if layout is horizontal. +# @param $part - Part of the problem that's being displayed. +# @param $show_answer- True if answers should be shown. +# +# @return string +# @retval generated html. +# +sub display_foils_html { + my ($whichfoils, $target, $direction, $part, $show_answer) = @_; my $result; - my $part=$Apache::inputtags::part; - my $solved=$Apache::lonhomework::history{"resource.$part.solved"}; - if ( ($target ne 'tex') && - &Apache::response::show_answer() ) { - if ($direction eq 'horizontal') { - if ($target ne 'tex') { - $result.=''; + + # if the answers get shown, we need to label each item as correct or + # incorrect. + + my ($opening_html, $finalclose, $item_pretext, $item_posttext) = + &html_direction_fragments($direction); + + $result .= $opening_html; + + + if ($show_answer) { + + foreach my $name (@{$whichfoils}) { + + # If the item gets further surrounded by tags, this + # holds the closures for those tages. + + my $item_closetag = ''; + + $result .= $item_pretext; + + # Label each foil as correct or incorrect: + + if ($Apache::response::foilgroup{$name . '.value'} eq 'true') { + $result .= &mt('Correct:') . ''; + $item_closetag .= ''; + + } else { + $result .= &mt('Incorrect'); } - } - foreach my $name (@{ $whichfoils }) { - if ($direction eq 'horizontal') { - if ($target ne 'tex') { $result.=''; } + my $preindent; + if ($bubble_number > 0) { + $preindent = '\hspace*{3 mm}'; } + my $foiltext = $Apache::response::foilgroup{$name . '.text'}; + $foiltext =~ s/\\noindent//; # forgive me for I have sinned.. + $result .= '{\small \textbf{' + . $identifier .$preindent + . $alphabet[$i] + . '}}$\bigcirc$' + . $foiltext + . '\\\\'; #' stupid emacs -- it thinks it needs that apostrophe to close the quote + + $i++; + $bubble_number++; } - if ($direction eq 'horizontal') { - if ($target ne 'tex') { - $result.='
'; } + + # Web rendition encloses the + # item text in a label tag as well: + + if ($target eq 'web') { + $result .= '' . $item_closetag; } - if ($target ne 'tex') { - $result.="
"; - } else { - $result.='\item \vskip -2 mm '; + $result .= $Apache::response::foilgroup{$name . '.text'}; + $result .= $item_closetag; + $result .= $item_posttext; + $result .= "\n"; # make the html a bit more readable. + } + + + } else { + my $lastresponse = &get_last_response($part); + + my $item_no = 0; + foreach my $name (@{$whichfoils}) { + $result .= $item_pretext; + $result .= &html_radiobutton( + $part, $Apache::inputtags::response[-1], + $name, $lastresponse, $item_no + ); + $result .= $item_posttext; + $item_no++; + } + + } + $result .= $finalclose; + + return $result; +} +## +# Display foils in exam mode for latex +# +# @param $whichfoils - Reference to an array that contains the foil names to display +# @param $bubbles_per_line - Number of bubbles on a line. +# @param $direction - Rendering direction 'horizontal' is what we're looking for. +# @param $venv - Name of LaTeX environment to use for vertical rendering. +# +# @return string +# @return the latex rendering of the exam problem. +# +# +sub display_latex_exam { + my ($whichfoils, $bubbles_per_line, $direction, $venv) = @_; + my $result; + my $numlines; + my $bubble_number = 0; + my $line = 0; + my $i = 0; + + + if ($direction eq 'horizontal') { + + # Marshall the display text for each foil and turn things over to + # Apache::response::make_horizontal_bubbles: + + my @foil_texts = &get_foil_texts($whichfoils); + $result .= &Apache::caparesponse::make_horizontal_latex_bubbles( + $whichfoils, \@foil_texts, '$\bigcirc$'); + + } else { + + $result .= '\vskip 2mm \noindent'; + + # This section puts out the prefix that tells the user + # (if necessary) to only choose one bubble in the next n lines + # for problems with more than one line worth of bubbles in the grid sheet: + + my $numitems = scalar( @{$whichfoils} ); + $numlines = int( $numitems / $bubbles_per_line ); + if ( ( $numitems % $bubbles_per_line ) != 0 ) { + $numlines++; + } + if ( $numlines < 1 ) { + $numlines = 1; + } + if ( $numlines > 1 ) { + my $linetext; + for ( my $i = 0 ; $i < $numlines ; $i++ ) { + $linetext .= $Apache::lonxml::counter + $i . ', '; } - if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { - if ($target ne 'tex') { - $result.=&mt('Correct:').''; - } else { - $result.=&mt('Correct:').' \textbf{'; - } - } else { - $result.=&mt('Incorrect:'); + $linetext =~ s/,\s$//; + $result .= + '\small {\textbf{' + . $linetext . '}} ' + . ' {\footnotesize ' + . &mt( '(Bubble once in [_1] lines)', $numlines ) + . '} \hspace*{\fill} \\\\'; + } + else { + $result .= '\textbf{' . $Apache::lonxml::counter . '}.'; + } + + # Now output the bubbles themselves: + + foreach my $name (@{$whichfoils}) { + if ( $bubble_number >= $bubbles_per_line ) { + $line++; + $i = 0; + $bubble_number = 0; } - if ($target eq 'web') { $result.=""; } - if ($Apache::response::foilgroup{$name.'.value'} eq 'true') { - if ($target ne 'tex') { $result.='';} else {$result.='}';} + my $identifier; + if ( $numlines > 1 ) { + $identifier = $Apache::lonxml::counter + $line; } - if ($direction eq 'horizontal') { - if ($target ne 'tex') { $result.='
'; - } + + } + + return $result; + +} + +## +# Display latex when exam mode is not on. +# +# @param $whichfoils - The foils to display +# @param $direction - Display direction ('horizontal' is what matters to us). +# @param $venv - Vertical env. to use for vertical rendering. +# @param $vend - End the vertical environment being used. +# +# @return string +# @retval - The LaTeX rendering of the resource.' +# +sub display_latex { + my ($whichfoils, $direction, $venv) = @_; + my $result; + + # how we render depends on the direction. + # Vertical is some kind of list environment determined by vbegin/vend. + # Horizontal is a table that is generated by + # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string + # for the actual bubble text. + + if ($direction eq 'horizontal') { + my @foil_texts = &get_foil_texts($whichfoils); + $result .= &Apache::caparesponse::make_horizontal_latex_bubbles( + $whichfoils, \@foil_texts, ''); + } else { + $result .= "\\begin{$venv}"; + foreach my $name (@{$whichfoils}) { + $result .= '\vspace*{-2 mm}\item ' + . $Apache::response::foilgroup{ $name . '.text' }; } + + $result .= "\\end{$venv}"; + } + return $result; +} + + +## +# Render foils for a PDF form. This is a variant of tex rednering that provides +# sufficient markup that the final PDF is a form that can be filled in online, +# or offline. +# +# @param $whichfoils - References an array of foils to display in the order in which +# they should be displayed. +# @param $direction - Rendering direction. 'horiztonal' means inputs are laid out +# horizontally otherwise they are stacked vertically. +# @param $venv - Vertical environment in which to wrap the foils. +# +# @return string +# @retval String containing the rendering of the resource. +# +# TODO: Take into account direction!!! +# +sub display_pdf_form { + my ($whichfoils, $direction, $venv) = @_; + my $temp = 0; + my $result; + + $result .= "\\begin{$venv}"; + foreach my $name ( @{$whichfoils} ) { + + my $fieldname = + $env{'request.symb'} + . '&part_' + . $Apache::inputtags::part + . '&radiobuttonresponse' + . '&HWVAL_' + . $Apache::inputtags::response['-1']; + $result .= '\item[{' + . &Apache::lonxml::print_pdf_radiobutton( $fieldname, + $temp ) + . '}]' + . $Apache::response::foilgroup{ $name . '.text' } + . "\n"; + + $temp++; + } + $result .= "\\end{$venv}"; + + return $result; +} + + +## +# Display selected foils: This is really just a dispatchter to appropriate renderers +# +# @param $target - Target (e.g. 'tex'...). +# @param $answer - True if answers should be shown. +# @param $whichfoils - Array of foil selectors that indicate which foils shouild be +# rendered, in rendering order. +# @param $direction- Rendering direction ('horizontal' is the one we look for, +# otherwise foils are rendered one per line vertically. +# @param $bubbles_per_line - number of exam bubbles per line. +# +# @return string +# @retval The rendered problem. + +sub displayfoils { + my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_; + my $result; + + + my $part = $Apache::inputtags::part; + my $solved = $Apache::lonhomework::history{"resource.$part.solved"}; + + # Show answers html. + + if ( ( $target ne 'tex' ) + && &Apache::response::show_answer() ) + { + + $result = &display_foils_html( + $whichfoils, $target, $direction, $part, 1); + + # other html + } elsif ($target ne 'tex') { + $result = &display_foils_html($whichfoils, $target, $direction, $part, + 0, 0); + + # LaTeX rendering: } else { - my @alphabet = ('A'..'Z'); - my $i = 0; - my $bubble_number = 0; - my $line = 0; - my $temp=0; - my $id=$Apache::inputtags::response['-1']; - my $part=$Apache::inputtags::part; - my ($lastresponse,$newvariation); - if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') || - ($Apache::lonhomework::type eq 'randomizetry')) && - ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) { - if ($env{'form.'.$part.'.rndseed'} ne - $Apache::lonhomework::history{"resource.$part.rndseed"}) { - $newvariation = 1; - } - } - unless ($newvariation) { - $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"}; - } - my %lastresponse=&Apache::lonnet::str2hash($lastresponse); - if ($target ne 'tex' && $direction eq 'horizontal') { - $result.=""; - } - my $numlines; - if (($target eq 'tex') && ($Apache::lonhomework::type eq 'exam')) { - my $numitems = scalar(@{ $whichfoils }); - $numlines = int($numitems/$bubbles_per_line); - if (($numitems % $bubbles_per_line) != 0) { - $numlines ++; - } - if ($numlines < 1) { - $numlines = 1; - } - if ($numlines > 1) { - my $linetext; - for (my $i=0; $i<$numlines; $i++) { - $linetext .= $Apache::lonxml::counter+$i.', '; - } - $linetext =~ s/,\s$//; - $result .= '\item[\small {\textbf{'.$linetext.'}}]'. - ' {\footnotesize '. - &mt('(Bubble once in [_1] lines)',$numlines). - '} \hspace*{\fill} \\\\'; - } else { - $result .= '\item[\textbf{'.$Apache::lonxml::counter.'}.]'; - } - } - foreach my $name (@{ $whichfoils }) { - if ($target ne 'tex') { - if ($direction eq 'horizontal') { - $result.=""; + $result .= &display_latex($whichfoils, $direction, $vertical_env ); } - $temp++; - } - if ($target ne 'tex' && $direction eq 'horizontal') { - $result.="
"; - } else { - $result.="
"; - } - } - if ($target ne 'tex') { - $result.= '
"; + $result .= '\vskip 0 mm '; + } } - if ($target ne 'tex') { if ($direction ne 'horizontal') { $result.="
";} } else { $result.='\vskip 0 mm '; } return $result; }