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# You may distribute under the terms of either the GNU General Public License |
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# or the Artistic License (the same terms as Perl itself) |
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# |
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# (C) Paul Evans, 2012-2014 -- leonerd@leonerd.org.uk |
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package Tickit::Widget::Menu::base; |
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use strict; |
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use warnings; |
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use feature qw( switch ); |
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use base qw( Tickit::Widget Tickit::Widget::Menu::itembase ); |
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our $VERSION = '0.11'; |
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use Carp; |
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use Tickit::Utils qw( textwidth ); |
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use constant separator => []; |
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sub new |
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{ |
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my $class = shift; |
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my %args = @_; |
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foreach my $method (qw( pos2item on_mouse_item redraw_item popup_item activated )) { |
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$class->can( $method ) or |
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croak "$class cannot ->$method - do you subclass and implement it?"; |
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} |
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my $self = $class->SUPER::new( %args ); |
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$self->_init_itembase( %args ); |
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$self->{items} = []; |
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$self->{itemwidths} = []; |
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$self->{active_idx} = undef; # index of keyboard-selected highlight |
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if( $args{items} ) { |
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$self->push_item( $_ ) for @{ $args{items} }; |
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} |
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return $self; |
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} |
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sub items |
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{ |
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my $self = shift; |
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return @{ $self->{items} }; |
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} |
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sub _itemwidth |
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{ |
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my $self = shift; |
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my ( $idx ) = @_; |
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return $self->{itemwidths}[$idx]; |
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} |
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sub push_item |
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{ |
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my $self = shift; |
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my ( $item ) = @_; |
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push @{ $self->{items} }, $item; |
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push @{ $self->{itemwidths} }, $item == separator ? 0 : textwidth $item->name; |
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} |
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sub highlight_item |
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{ |
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my $self = shift; |
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my ( $idx ) = @_; |
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return if defined $self->{active_idx} and $idx == $self->{active_idx}; |
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my $have_window = defined $self->window; |
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if( defined( my $old_idx = $self->{active_idx} ) ) { |
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undef $self->{active_idx}; |
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my $old_item = $self->{items}[$old_idx]; |
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if( $old_item->isa( "Tickit::Widget::Menu" ) ) { |
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$old_item->dismiss; |
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} |
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$self->redraw_item( $old_idx ) if $have_window; |
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} |
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$self->{active_idx} = $idx; |
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$self->redraw_item( $idx ) if $have_window; |
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} |
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sub expand_item |
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{ |
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my $self = shift; |
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my ( $idx ) = @_; |
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$self->highlight_item( $idx ); |
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my $item = $self->{items}[$idx]; |
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if( $item->isa( "Tickit::Widget::Menu" ) ) { |
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$self->popup_item( $idx ); |
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$item->set_supermenu( $self ); |
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} |
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# else don't bother expanding non-menus |
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} |
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sub activate_item |
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{ |
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my $self = shift; |
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my ( $idx ) = @_; |
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my $item = $self->{items}[$idx]; |
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if( $item->isa( "Tickit::Widget::Menu" ) ) { |
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$self->expand_item( $idx ); |
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} |
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else { |
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$self->activated; |
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$item->activate; |
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} |
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} |
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sub set_on_activated |
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{ |
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my $self = shift; |
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( $self->{on_activated} ) = @_; |
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} |
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sub dismiss |
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{ |
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my $self = shift; |
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if( defined $self->{active_idx} ) { |
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my $item = $self->{items}[$self->{active_idx}]; |
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$item->dismiss if $item->isa( "Tickit::Widget::Menu" ); |
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} |
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undef $self->{active_idx}; |
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} |
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sub key_highlight_next |
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{ |
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my $self = shift; |
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my $items = $self->{items}; |
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my $idx = $self->{active_idx}; |
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if( defined $idx ) { |
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$idx++, $idx %= @$items; |
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} |
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else { |
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$idx = 0; |
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} |
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$idx++, $idx %= @$items while $items->[$idx] == separator; |
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$self->highlight_item( $idx ); |
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return 1; |
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} |
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sub key_highlight_prev |
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{ |
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my $self = shift; |
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163
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my $items = $self->{items}; |
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my $idx = $self->{active_idx}; |
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if( defined $idx ) { |
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$idx--, $idx %= @$items; |
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} |
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else { |
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$idx = $#$items; |
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} |
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$idx--, $idx %= @$items while $items->[$idx] == separator; |
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$self->highlight_item( $idx ); |
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177
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return 1; |
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} |
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sub key_dismiss |
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{ |
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my $self = shift; |
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$self->dismiss; |
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186
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return 1; |
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} |
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189
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sub key_activate |
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{ |
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my $self = shift; |
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193
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if( defined( my $idx = $self->{active_idx} ) ) { |
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$self->activate_item( $idx ); |
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} |
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197
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return 1; |
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} |
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200
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sub on_mouse |
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{ |
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my $self = shift; |
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my ( $args ) = @_; |
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205
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my $line = $args->line; |
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my $col = $args->col; |
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208
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if( $line < 0 or $line >= $self->window->lines or |
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$col < 0 or $col >= $self->window->cols ) { |
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$self->dismiss, return 0 if $args->type eq "press"; |
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return 0; |
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} |
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my ( $item, $item_idx, $item_col ) = $self->pos2item( $line, $col ); |
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$item or return 1; |
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217
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$self->on_mouse_item( $args, $item, $item_idx, $item_col ); |
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} |
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0x55AA; |