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=doc
Use the insert-text signal to trap and possibly mangle text as the user types,
but before it is committed and displayed.
=cut
use Gtk2 -init;
use Data::Dumper;
$dialog = Gtk2::Dialog->new;
$dialog->add_button ('gtk-close' => 'close');
$entry = Gtk2::Entry->new;
$entry->set_activates_default (1);
$entry->signal_connect ('insert-text' => sub {
my ($widget, $string, $len, $position) = @_;
if ($string eq '-') {
$_[1] = '_';
$_[3]--;
} elsif ($string eq 'ee') {
$_[1] = ' <whee> ';
} elsif ($string eq '#') {
# just can't insert these.
$entry->signal_stop_emission_by_name
('insert-text');
warn "NOSOUPFORYOU!!\n";
}
() # this callback must return either 2 or 0 items.
});
$dialog->vbox->pack_start ($entry, 0, 0, 0);
$entry->show;
$label = Gtk2::Label->new;
$label->set_markup ('using a handler for insert-text, this entry
turns dashes into underscores (moved back
one space), turns the string "ee" into
something else (you\'ll have to paste it),
and won\'t let you type a #.');
$dialog->vbox->pack_start ($label, 1,1, 0);
$label->show;
# while we're testing custom marshallers, connect to dialog's response
# signal, which also has a custom marshaller. if the blue smoke gets
# out, then something i broken deep inside.
$dialog->signal_connect (response => sub {
print Dumper(\@_);
Gtk2->main_quit;
});
$dialog->show;
Gtk2->main;
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