Re: Gtk3::TargetEntry

[Torsten Schönfeld <kaffeetisch gmx de>]

On 06.12.2017 18:15, Jeff wrote:
> In migrating my Gtk2 application to Gtk3, I am struggling to find the
> new name for the Gtk3::TargetFlags
>
> This doesn't work:
>
>      my $target_entry = Gtk3::TargetEntry->new(
>          'Glib::Scalar',    # some string representing the drag type
>          Gtk3::TARGET_SAME_WIDGET,     # Gtk3::TargetFlags
>          $ID_PAGE,          # some app-defined integer identifier
>      );

GtkTargetFlags is represented as a normal flags class, so you should be 
able to simply use, e.g., qw/same-widget/.  However, for some reason, 
the C-level constructor underlying Gtk3::TargetEntry->new has the flags 
argument typed simply as an unsigned integer, not as GtkTargetFlags. 
Hence, all the conversion magic is never invoked.  I see three options 
for you:

* Use the recently introduced 
Glib::Object::Introspection->convert_sv_to_flags:

        Glib::Object::Introspection->convert_sv_to_flags (
                "Gtk3::TargetFlags", qw/same-widget/)

* Use the undocumented implementation detail that Glib::Flags objects 
dereference to the underlying integer:

        ${Gtk3::TargetFlags->new (qw/same-widget/)}

* Add an override for Gtk3::TargetEntry->new to Gtk3.pm that takes care 
of this automatically and submit a patch.  The override for 
Gtk3::Widget->set_events might serve as an example.

-Torsten