This is, I think, a design decision of GTK (mainly due to accessibility
concerns). See issue post here:
https://gitlab.gnome.org/GNOME/gtk/-/issues/270#note_394060.
It may be possible to implement the keypress hack you described, but you may be
compromising accessibility for aesthetics.
Best,
Jeremy
On Wed, Mar 23, 2022 at 04:59:42PM +0100, Kerenoc Kerenoc via gtk-perl-list
wrote:
> Hello,
>
> With Gtk3 on Windows and Linux, when a ComboBox has a long list of items to
> select from, there is a large empty zone above the first element of the
> list. Using the up arrow key then the down arrow key restores a normal
> situation.
>
> Here is a simple program to reproduce the problem.
>
> ================================
> #!/usr/bin/perl
>
> use Gtk3 -init;
>
> my $combobox = Gtk3::ComboBoxText->new;
> for (0 .. 150) { $combobox->append_text("$_"); };
> $combobox->set_active(0);
>
> my $window=Gtk3::Window->new('toplevel');
> $window->signal_connect( destroy => sub {Gtk3::main_quit} );
> $window->add($combobox);
> $window->show_all;
> Gtk3->main();
> ================================
>
> The problem can also be reproduced with a Gtk3::ComboBox.
>
> In case this problem couldn't be solved, how could one emulate two key
> events (up and down) in a callback when the combobox opens?
>
> Best regards
> _______________________________________________
> gtk-perl-list mailing list
> gtk-perl-list@gnome.org
> https://mail.gnome.org/mailman/listinfo/gtk-perl-list
--
Few things are harder to put up with than the annoyance of a good example.
-- "Mark Twain, Pudd'nhead Wilson's Calendar"
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