On 08.07.2012 05:20, Daniel Kasak wrote:
One of my Gtk2 projects has some customer CellRenderers. I've done the
basic s/Gtk2/Gtk3/ on everything ... and now my treeview code is dying with:
GLib-GObject-CRITICAL **: Object class My__CellEditableText doesn't
implement property 'editing-canceled' from interface 'GtkCellEditable'
at
/usr/lib64/perl5/vendor_perl/5.12.4/x86_64-linux-thread-multi/Glib/Object/Subclass.pm
line 233.
That's just a (strong) warning, your program will normally not exit due
to this. Also, if your gtk+ >= 2.20, you will also get this warning
with Gtk2.
Are there any docs on this ( ie what's required when subclassing a
GtkCellEditable ) ... or even better ... what's changed between Gtk2 and
Gtk3 more generally?
Well, what is required to implement an interface actually depends on the
interface. There is some general documentation at
<http://developer.gnome.org/gobject/stable/howto-interface.html>, but
much of it shows boilerplate code that Glib::Object::Subclass handles
for you already. For GtkCellEditable, it seems like nothing is really
required, the default implementations are sufficient. If you wanted to
pass such an editable to code that assumes a fully general editable,
maybe something would break, I'm not sure.
To get rid of the property warning, you would use
use Glib::Object::Subclass
Gtk2::TextView::,
properties => [
Glib::ParamSpec->boolean (
'editing-canceled',
'Editing canceled',
'Editing canceled',
Glib::FALSE,
[qw/readable writable/]
),
],
interfaces => [ Gtk2::CellEditable:: ];
But that doesn't currently work correctly, at least on my machine,
because the order that the 'properties' and 'interfaces' args from above
reach the type registration machinery is currently random. The warning
occurs if 'interfaces' is processed before 'properties'. The attached
patch to Glib fixes this for me.
Also, this warning would not occur if Glib handled interface properties
more smartly: <http://bugzilla.gnome.org/show_bug.cgi?id=570792>.
For now, I think it's safe for you to ignore this warning.
diff --git a/lib/Glib/Object/Subclass.pm b/lib/Glib/Object/Subclass.pm
index 1652d8e..5968b65 100644
--- a/lib/Glib/Object/Subclass.pm
+++ b/lib/Glib/Object/Subclass.pm
@@ -227,12 +227,12 @@ sub import {
# ignore anything that doesn't look like a registration attempt.
return unless @_ > 1;
- my ($self, $superclass, %arg) = @_;
+ my ($self, $superclass, @args) = @_;
my $class = caller;
Glib::Type->register_object(
$superclass, $class,
- %arg,
+ @args,
);
# ensure that we have a perlish new(). the old version of this
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