lib/gtk: add `GtkBox` to containers hierarchy

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gtk/v3_4/gtk_core.nit b/lib/gtk/v3_4/gtk_core.nit
index 561139b..cee996c 100644 (file)
--- a/lib/gtk/v3_4/gtk_core.nit
+++ b/lib/gtk/v3_4/gtk_core.nit
@@ -348,6 +348,13 @@ extern class GtkGrid `{GtkGrid *`}
        `}
 end
 
+# A container box
+#
+# @https://developer.gnome.org/gtk3/3.4/GtkBox.html
+extern class GtkBox `{ GtkBox * `}
+       super GtkContainer
+end
+
 #The tree interface used by GtkTreeView
 #@https://developer.gnome.org/gtk3/stable/GtkTreeModel.html
 extern class GtkTreeModel `{GtkTreeModel *`}