my $window = map { $_->signal_connect( delete_event => sub { Gtk2->main_quit } ); $_->set_title( "Test" ); $_->set_border_width( 15 ); $_->add( map { $_->signal_connect( clicked => sub { Gtk2->main_quit } ); $_; } Gtk2::Button->new( "Quit" ) ); $_->show_all(); $_; } Gtk2::Window->new( "toplevel" );