[perl-Gtk3] Add Gtk3::EVENT_PROPAGATE and Gtk3::EVENT_STOP

[Torsten SchÃnfeld <tsch src gnome org>]

commit 6de0240ca61dc9da8215ee5ed0d2c142cb6de383
Author: Torsten SchÃnfeld <kaffeetisch gmx de>
Date:   Tue Jan 8 22:44:57 2013 +0100

    Add Gtk3::EVENT_PROPAGATE and Gtk3::EVENT_STOP

 NEWS        |    1 +
 lib/Gtk3.pm |   13 +++++++++++++
 2 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 6715910..067daee 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 {{$NEXT}}
 
 * Add overrides for Gtk3::Container.
+* Add Gtk3::EVENT_PROPAGATE and Gtk3::EVENT_STOP.
 * Test that no double-frees occur for custom Gtk3::Widget subclasses.
 
 Overview of changes in Gtk3 0.008 [2012-08-26]
diff --git a/lib/Gtk3.pm b/lib/Gtk3.pm
index 63eb53d..ee886bd 100644
--- a/lib/Gtk3.pm
+++ b/lib/Gtk3.pm
@@ -205,6 +205,19 @@ sub Gtk3::check_version {
                                        @_ == 4 ? @_[1..3] : @_);
 }
 
+# Names "STOP" and "PROPAGATE" here are per the GtkWidget event signal
+# descriptions.  In some other flavours of signals the jargon is "handled"
+# instead of "stop".  "Handled" matches g_signal_accumulator_true_handled(),
+# though that function doesn't rate a mention in the Gtk docs.  There's
+# nothing fixed in the idea of "true means cease emission" (whether it's
+# called "stop" or "handled").  You can just as easily have false for cease
+# (the way the underlying GSignalAccumulator func in fact operates).  The
+# upshot being don't want to attempt to be too universal with the names
+# here; "EVENT" is meant to hint at the context or signal flavour they're
+# for use with.
+sub Gtk3::EVENT_PROPAGATE() { !1 };
+sub Gtk3::EVENT_STOP() { 1 };
+
 sub Gtk3::init {
   my $rest = Glib::Object::Introspection->invoke (
                $_GTK_BASENAME, undef, 'init',