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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, 2013 -- leonerd@leonerd.org.uk |
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package Tickit::Widget::LinearSplit; |
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use strict; |
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use warnings; |
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use base qw( Tickit::ContainerWidget ); |
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use Tickit::Window 0.32; # needs drag_start |
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our $VERSION = '0.27'; |
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use Carp; |
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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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my $self = $class->SUPER::new( %args ); |
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$self->{split_fraction} = 0.5; |
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return $self; |
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} |
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sub A_child |
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{ |
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my $self = shift; |
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$self->{A_child}; |
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} |
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sub set_A_child |
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{ |
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my $self = shift; |
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my ( $child ) = @_; |
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$self->remove( $self->{A_child} ) if $self->{A_child}; |
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$self->add( $self->{A_child} = $child ); |
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} |
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sub B_child |
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{ |
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my $self = shift; |
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$self->{B_child}; |
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} |
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sub set_B_child |
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{ |
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my $self = shift; |
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my ( $child ) = @_; |
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$self->remove( $self->{B_child} ) if $self->{B_child}; |
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$self->add( $self->{B_child} = $child ); |
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} |
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sub children |
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{ |
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my $self = shift; |
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return grep { defined } $self->{A_child}, $self->{B_child}; |
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} |
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sub child_resized |
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{ |
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my $self = shift; |
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# TODO: should handle minimums at least |
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} |
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## This should come from ContainerWidget |
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sub children_changed |
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{ |
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my $self = shift; |
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$self->reshape if $self->window; |
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$self->resized; |
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} |
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## |
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sub reshape |
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{ |
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my $self = shift; |
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my $win = $self->window or return; |
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my $spacing = $self->get_style_values( "spacing" ); |
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my $method = $self->VALUE_METHOD; |
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my $quota = $win->$method - $spacing; |
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my $want_split_at = int( $quota * $self->{split_fraction} + 0.5 ); # round to nearest |
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# Enforce child minimum sizes |
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if( my $child = $self->{B_child} ) { |
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my $max = $quota - $child->$method; |
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$want_split_at = $max if $want_split_at > $max; |
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} |
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if( my $child = $self->{A_child} ) { |
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my $min = $child->$method; |
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$want_split_at = $min if $want_split_at < $min; |
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} |
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my $A_value = $want_split_at; |
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my $B_value = $quota - $want_split_at; |
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my @A_geom = $self->_make_child_geom( 0, $A_value ); |
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my @B_geom = $self->_make_child_geom( $A_value + $spacing, $B_value ); |
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if( my $child = $self->{A_child} ) { |
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if( $A_value > 0 ) { |
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if( my $childwin = $child->window ) { |
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$childwin->change_geometry( @A_geom ); |
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} |
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else { |
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$child->set_window( $win->make_sub( @A_geom ) ); |
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} |
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} |
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else { |
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$child->set_window( undef ); |
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} |
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} |
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if( my $child = $self->{B_child} ) { |
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if( $B_value > 0 ) { |
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if( my $childwin = $child->window ) { |
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$childwin->change_geometry( @B_geom ); |
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} |
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else { |
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$child->set_window( $win->make_sub( @B_geom ) ); |
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} |
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} |
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else { |
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$child->set_window( undef ); |
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} |
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} |
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$self->{split_at} = $A_value; |
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$self->{split_len} = $spacing; |
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} |
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sub _on_mouse |
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{ |
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my $self = shift; |
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my ( $ev, $val ) = @_; |
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my $val0 = $val - $self->{split_at}; |
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my $in_split = $val0 >= 0 && $val0 < $self->{split_len}; |
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if( $ev eq "press" ) { |
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$self->set_style_tag( active => 1 ) if $in_split; |
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} |
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elsif( $ev eq "drag_start" ) { |
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return unless $in_split; |
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$self->{drag_mouse_offset} = $val0; |
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return 1; |
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} |
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elsif( $ev eq "drag" ) { |
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return unless defined $self->{drag_mouse_offset}; |
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my $method = $self->VALUE_METHOD; |
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my $quota = $self->window->$method - $self->{split_len}; |
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my $want_split_at = $val - $self->{drag_mouse_offset}; |
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$self->{split_fraction} = $want_split_at / $quota; |
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$self->reshape; |
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$self->redraw; |
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} |
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elsif( $ev eq "drag_drop" ) { |
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undef $self->{drag_mouse_offset}; |
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} |
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elsif( $ev eq "release" ) { |
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$self->set_style_tag( active => 0 ) if $in_split; |
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} |
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} |
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0x55AA; |