1 files changed, 139 insertions, 0 deletions
diff --git a/lib/Reaction/UI/ViewPort/Field/ChooseMany.pm b/lib/Reaction/UI/ViewPort/Field/ChooseMany.pm
new file mode 100644
index 0000000..0ea4ed0
--- /dev/null
+++ b/lib/Reaction/UI/ViewPort/Field/ChooseMany.pm
@@ -0,0 +1,139 @@
+package Reaction::UI::ViewPort::Field::ChooseMany;
+
+use Reaction::Class;
+
+class ChooseMany is 'Reaction::UI::ViewPort::Field::ChooseOne', which {
+
+  has '+layout' => (default => 'dual_select_group');
+  
+  has '+value' => (isa => 'ArrayRef');
+  
+  has available_value_names => 
+      (isa => 'ArrayRef', is => 'ro', lazy_build => 1);
+  
+  has value_names => (isa => 'ArrayRef', is => 'ro', lazy_build => 1);
+  
+  my $listify = sub {                  # quick utility function, $listify->($arg)
+    return (defined($_[0])
+             ? (ref($_[0]) eq 'ARRAY'
+                 ? $_[0]               # \@arr => \@arr
+                 : [$_[0]])            # $scalar => [$scalar]
+             : []);                    # undef => []
+  };
+  
+  around value => sub {
+    my $orig = shift;
+    my $self = shift;
+    if (@_) {
+      my $value = $listify->(shift);
+      if (defined $value) {
+	$_ = $self->str_to_ident($_) for @$value;
+        my $checked = $self->attribute->check_valid_value($self->action, $value);
+        # i.e. fail if any of the values fail
+	confess "Not a valid set of values" 
+	  if (@$checked < @$value || grep { !defined($_) } @$checked);
+
+        $value = $checked;
+      }
+      $orig->($self, $value);
+    } else {
+      $orig->($self);
+    }
+  };
+  
+  override build_value => sub {
+    return super() || [];
+  };
+  
+  implements is_current_value => as {
+    my ($self, $check_value) = @_;
+    my @our_values = @{$self->value||[]};
+    #$check_value = $check_value->id if ref($check_value);
+    #return grep { $_->id eq $check_value } @our_values;
+    $check_value = $self->obj_to_str($check_value) if ref($check_value);
+    return grep { $self->obj_to_str($_) eq $check_value } @our_values;
+  };
+  
+  implements current_values => as {
+    my $self = shift;
+    my @all = grep { $self->is_current_value($_) } @{$self->valid_values};
+    return [ @all ];
+  };
+  
+  implements available_values => as {
+    my $self = shift;
+    my @all = grep { !$self->is_current_value($_) } @{$self->valid_values};
+    return [ @all ];
+  };
+  
+  implements build_available_value_names => as {
+    my $self = shift;
+    my @all = @{$self->available_values};
+    my $meth = $self->value_map_method;
+    my @names = map { $_->$meth } @all;
+    return [ sort @names ];
+  };
+  
+  implements build_value_names => as {
+    my $self = shift;
+    my @all = @{$self->value||[]};
+    my $meth = $self->value_map_method;
+    my @names = map { $_->$meth } @all;
+    return [ sort @names ];
+  };
+  
+  around handle_events => sub {
+    my $orig = shift;
+    my ($self, $events) = @_;
+    my $ev_value = $listify->($events->{value});
+    if (delete $events->{add_all_values}) {
+      $events->{value} = $self->valid_values;
+    } 
+    if (delete $events->{do_add_values} && exists $events->{add_values}) {
+      my $add = $listify->(delete $events->{add_values});
+      $events->{value} = [ @{$ev_value}, @$add ];
+    }
+    if (delete $events->{remove_all_values}) {
+      $events->{value} = [];
+    } 
+    if (delete $events->{do_remove_values} && exists $events->{remove_values}) {
+      my $remove = $listify->(delete $events->{remove_values});
+      my %r = map { ($_ => 1) } @$remove;
+      $events->{value} = [ grep { !$r{$_} } @{$ev_value} ];
+    }
+    return $orig->(@_);
+  };
+
+};
+
+1;
+
+=head1 NAME
+
+Reaction::UI::ViewPort::Field::ChooseMany
+
+=head1 DESCRIPTION
+
+=head1 METHODS
+
+=head2 is_current_value
+
+=head2 current_values
+
+=head2 available_values
+
+=head2 available_value_names
+
+=head1 SEE ALSO
+
+=head2 L<Reaction::UI::ViewPort::Field>
+
+=head1 AUTHORS
+
+See L<Reaction::Class> for authors.
+
+=head1 LICENSE
+
+See L<Reaction::Class> for the license.
+
+=cut