#! perl

sub on_button_press {
   my ($self, $event) = @_;

   my ($row, $col) = $self->screen_cur;
   my $line = $self->line ($row);
   my $cur = $line->offset_of ($row, $col);
   my $ofs = $line->offset_of ($event->{row}, $event->{col});

   if ($ofs >= 0 && $ofs < $line->l) {
      my $diff = $ofs - $cur;

      $self->tt_write ($diff < 0 ? "\x1b[D" x -$diff
                                 : "\x1b[C" x $diff);
   }

   ()
}