version 1.41, 2003/08/07 17:26:44
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version 1.43, 2003/08/13 14:52:08
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Line 1142 sub end_choice {
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Line 1142 sub end_choice {
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} |
} |
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sub render { |
sub render { |
# START HERE: Replace this with correct choices code. |
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my $self = shift; |
my $self = shift; |
my $var = $self->{'variable'}; |
my $var = $self->{'variable'}; |
my $buttons = ''; |
my $buttons = ''; |
Line 1261 sub postprocess {
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Line 1260 sub postprocess {
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} |
} |
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if (defined($self->{NEXTSTATE})) { |
if (defined($self->{NEXTSTATE})) { |
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$helper->changeState($self->{NEXTSTATE}); |
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} |
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foreach my $choice (@{$self->{CHOICES}}) { |
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if ($choice->[1] eq $chosenValue) { |
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if (defined($choice->[2])) { |
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$helper->changeState($choice->[2]); |
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} |
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} |
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} |
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return 1; |
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} |
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1; |
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package Apache::lonhelper::dropdown; |
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=pod |
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=head2 Element: dropdown |
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A drop-down provides a drop-down box instead of a radio button |
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box. Because most people do not know how to use a multi-select |
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drop-down box, that option is not allowed. Otherwise, the arguments |
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are the same as "choices", except "allowempty" is also meaningless. |
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<dropdown> takes an attribute "variable" to control which helper variable |
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the result is stored in. |
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B<SUB-TAGS> |
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<choice>, which acts just as it does in the "choices" element. |
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=back |
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=cut |
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no strict; |
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@ISA = ("Apache::lonhelper::element"); |
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use strict; |
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BEGIN { |
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&Apache::lonhelper::register('Apache::lonhelper::dropdown', |
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('dropdown')); |
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} |
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sub new { |
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my $ref = Apache::lonhelper::element->new(); |
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bless($ref); |
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} |
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# CONSTRUCTION: Construct the message element from the XML |
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sub start_dropdown { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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if ($target ne 'helper') { |
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return ''; |
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} |
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# Need to initialize the choices list, so everything can assume it exists |
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$paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'})); |
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$helper->declareVar($paramHash->{'variable'}); |
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$paramHash->{CHOICES} = []; |
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return ''; |
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} |
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sub end_dropdown { |
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my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; |
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if ($target ne 'helper') { |
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return ''; |
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} |
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Apache::lonhelper::dropdown->new(); |
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return ''; |
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} |
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sub render { |
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my $self = shift; |
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my $var = $self->{'variable'}; |
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my $result = ''; |
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if (defined $self->{ERROR_MSG}) { |
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$result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />'; |
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} |
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my %checkedChoices; |
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my $checkedChoicesFunc; |
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if (defined($self->{DEFAULT_VALUE})) { |
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$checkedChoicesFunc = eval ($self->{DEFAULT_VALUE}); |
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die 'Error in default value code for variable ' . |
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$self->{'variable'} . ', Perl said: ' . $@ if $@; |
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} else { |
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$checkedChoicesFunc = sub { return ''; }; |
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} |
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# single choice |
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my $selectedChoice = &$checkedChoicesFunc($helper, $self); |
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my $foundChoice = 0; |
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# check that the choice is in the list of choices. |
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for my $choice (@{$self->{CHOICES}}) { |
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if ($choice->[1] eq $selectedChoice) { |
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$checkedChoices{$choice->[1]} = 1; |
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$foundChoice = 1; |
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} |
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} |
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# If we couldn't find the choice, pick the first one |
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if (!$foundChoice) { |
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$checkedChoices{$self->{CHOICES}->[0]->[1]} = 1; |
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} |
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$result .= "<select name='${var}.forminput'>\n"; |
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foreach my $choice (@{$self->{CHOICES}}) { |
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$result .= "<option value='" . |
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HTML::Entities::encode($choice->[1]) |
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. "'"; |
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if ($checkedChoices{$choice->[1]}) { |
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$result .= " selected"; |
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} |
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my $choiceLabel = $choice->[0]; |
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if ($choice->[4]) { # if we need to evaluate this choice |
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$choiceLabel = "sub { my $helper = shift; my $state = shift;" . |
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$choiceLabel . "}"; |
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$choiceLabel = eval($choiceLabel); |
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$choiceLabel = &$choiceLabel($helper, $self); |
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} |
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$result .= ">" . $choiceLabel . "\n"; |
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} |
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$result .= "</select>\n"; |
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return $result; |
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} |
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# If a NEXTSTATE was given or a nextstate for this choice was |
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# given, switch to it |
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sub postprocess { |
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my $self = shift; |
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my $chosenValue = $ENV{'form.' . $self->{'variable'} . '.forminput'}; |
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if (!defined($chosenValue) && !$self->{'allowempty'}) { |
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$self->{ERROR_MSG} = "You must choose one or more choices to" . |
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" continue."; |
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return 0; |
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} |
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if (defined($self->{NEXTSTATE})) { |
$helper->changeState($self->{NEXTSTATE}); |
$helper->changeState($self->{NEXTSTATE}); |
} |
} |
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