[gtkmm: 4/5] Gtk::Filter: Fix reference counting errors

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 0250b0d6f803111fa0c634e85ff74b325a90f5a8
Author: Andreas Persson <andreasp56 outlook com>
Date:   Mon Aug 10 11:57:55 2020 +0200

    Gtk::Filter: Fix reference counting errors
    
    Fix reference counting for Filter::match(). Make Filter::changed()
    protected. Update doc for SortListModel.

 gtk/src/filter.hg        | 10 +++++-----
 gtk/src/sortlistmodel.hg |  4 ++++
 2 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/gtk/src/filter.hg b/gtk/src/filter.hg
index a52b365d..cf4624d3 100644
--- a/gtk/src/filter.hg
+++ b/gtk/src/filter.hg
@@ -61,17 +61,17 @@ public:
   _WRAP_ENUM(Match, GtkFilterMatch, decl_prefix GTKMM_API)
   _WRAP_ENUM(Change, GtkFilterChange, decl_prefix GTKMM_API)
 
-#m4 _CONVERSION(`const Glib::RefPtr<Glib::ObjectBase>&',`gpointer',`($3)->gobj_copy()')
+#m4 _CONVERSION(`const Glib::RefPtr<Glib::ObjectBase>&',`gpointer',`($3)->gobj()')
   _WRAP_METHOD(bool match(const Glib::RefPtr<Glib::ObjectBase>& item), gtk_filter_match)
   _WRAP_METHOD(Match get_strictness(), gtk_filter_get_strictness)
 
-  // for filter implementations
-  _WRAP_METHOD(void changed(Change change = Change::DIFFERENT), gtk_filter_changed)
- 
   _WRAP_SIGNAL(void changed(Change change), "changed", no_default_handler)
 
 protected:
-#m4 _CONVERSION(`gpointer',`const Glib::RefPtr<Glib::ObjectBase>&',`Glib::wrap(G_OBJECT($3))')
+  // for filter implementations
+  _WRAP_METHOD(void changed(Change change = Change::DIFFERENT), gtk_filter_changed)
+
+#m4 _CONVERSION(`gpointer',`const Glib::RefPtr<Glib::ObjectBase>&',`Glib::wrap(G_OBJECT($3), true)')
   _WRAP_VFUNC(bool match(const Glib::RefPtr<Glib::ObjectBase>& item), match)
   _WRAP_VFUNC(Match get_strictness(), get_strictness)
 };
diff --git a/gtk/src/sortlistmodel.hg b/gtk/src/sortlistmodel.hg
index 0c6b4187..af12fb3c 100644
--- a/gtk/src/sortlistmodel.hg
+++ b/gtk/src/sortlistmodel.hg
@@ -31,6 +31,10 @@ namespace Gtk
  * %Gtk::SortListModel is a list model that takes a list model and
  * sorts its elements according to a Gtk::Sorter.
  *
+ * The model can be set up to do incremental sorting, so that
+ * sorting long lists doesn't block the UI. See set_incremental()
+ * for details.
+ *
  * %Gtk::SortListModel is a generic model and because of that it
  * cannot take advantage of any external knowledge when sorting.
  * If you run into performance issues with %Gtk::SortListModel, it