Problem with long list for ComboBoxText

[Kerenoc Kerenoc <kerenoc01 gmail com>]

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.

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#!/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();

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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