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package Wx::Perl::EntryList; |
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=head1 NAME |
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Wx::Perl::EntryList - dynamic list that can be displayed in various controls |
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=head1 SYNOPSIS |
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my $list = Wx::Perl::EntryList->new; |
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$list->add_entries_at( 0, [ 'a', 'b', 'c', 'd', 'e' ] ); |
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# create a view to display it |
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my $view = Wx::Perl::EntryList::ListBoxView->new |
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( $list, sub { return $_[0] }, $parent ); |
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=head1 DESCRIPTION |
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A dynamic list that can be observed (using C) for |
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changes and can be displayed in various controls. |
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=head1 METHODS |
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=cut |
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use strict; |
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use base qw(Class::Publisher Class::Accessor::Fast); |
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our $VERSION = '0.01'; |
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__PACKAGE__->mk_accessors( qw(entries) ); |
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=head2 new |
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my $list = Wx::Perl::EntryList->new; |
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Creates a list object. |
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=cut |
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sub new { |
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my( $class ) = @_; |
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my $self = $class->SUPER::new( { entries => [] } ); |
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return $self; |
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} |
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=head2 get_entry_at |
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my $entry = $list->get_entry_at( $index ); |
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Returns the nth entry of the list. |
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=cut |
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sub get_entry_at { return $_[0]->entries->[ $_[1] ] } |
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=head2 add_entries_at |
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$list->add_entries_at( $index, [ $entry1, $entry2, ... ] ); |
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Add some entries to the list, notifying any listeners. |
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=cut |
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sub _add_entries_at { |
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my( $self, $index, $entries ) = @_; |
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splice @{$self->entries}, $index, 0, @$entries; |
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} |
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sub add_entries_at { |
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my( $self, $index, $entries ) = @_; |
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$self->_add_entries_at( $index, $entries ); |
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$self->notify_subscribers( 'add_entries', |
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index => $index, |
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count => scalar @$entries, |
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); |
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} |
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=head2 delete_entry |
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$list->delete_entry( $index ); |
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Deletes a single entry from the list, notifying any listeners. |
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=cut |
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sub _delete_entries { |
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my( $self, $index, $count ) = @_; |
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return splice @{$self->entries}, $index, $count; |
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} |
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sub delete_entry { |
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my( $self, $index ) = @_; |
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$self->_delete_entries( $index, 1 ); |
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$self->notify_subscribers( 'delete_entries', |
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index => $index, |
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count => 1, |
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); |
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} |
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=head2 move_entry |
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$list->move_entry( $from_index, $to_index ); |
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Moves an entry of the list, notifying any listeners. |
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=cut |
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sub move_entry { |
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my( $self, $from, $to ) = @_; |
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my( $entry ) = $self->_delete_entries( $from, 1 ); |
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$self->_add_entries_at( $to, [ $entry ] ); |
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$self->notify_subscribers( 'move_entries', |
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from => $from, |
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to => $to, |
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count => 1, |
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); |
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} |
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=head2 count |
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my $count = $list->count; |
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The number of items in the list. |
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=cut |
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sub count { scalar @{$_[0]->entries} } |
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sub _fixup_iterator { |
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my( $self, $it, $event, %args ) = @_; |
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if( $event eq 'add_entries' ) { |
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if( $it->current >= $args{index} ) { |
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$it->current( $it->current + $args{count} ); |
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} |
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} elsif( $event eq 'delete_entries' ) { |
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if( $it->current >= $args{index} ) { |
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if( $it->current < $args{index} + $args{count} ) { |
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$it->current( 0 ); |
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} else { |
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$it->current( $it->current - $args{count} ); |
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} |
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} |
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} elsif( $event eq 'move_entries' ) { |
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if( $it->current >= $args{from} |
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&& $it->current < $args{from} + $args{count} ) { |
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$it->current( $it->current - $args{from} + $args{to} ); |
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} else { |
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$self->_fixup_iterator( $it, 'delete_entries', |
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index => $args{from}, |
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count => $args{count}, |
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); |
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$self->_fixup_iterator( $it, 'add_entries', |
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index => $args{to}, |
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count => $args{count}, |
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); |
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} |
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} |
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} |
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=head1 AUTHOR |
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168
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Mattia Barbon . |
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=head1 LICENSE |
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This program is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. |
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=head1 SEE ALSO |
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L, |
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L, L, |
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L |
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=cut |
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1; |