[eel-canvas] don't use GtkObject (GTK3)

the ::destroy signal of GtkObject has only been moved to GtkWidget in GTK3
(after GtkObject removal): http://developer.gnome.org/gtk3/3.0/ch25s02.html
So, we conditionals in this case, to keep working with GTK2

Nautilus commit message: This implies adding a 'destroy' signal to EelCanvasItem,
with similar semantics to gtk_object_destroy()
http://git.gnome.org/browse/nautilus/commit/?id=1f615321613751a5dbc84d5ef7f20edd104b8dc4

1 files changed, 6 insertions, 2 deletions

diff --git a/eel/eel-canvas.h b/eel/eel-canvas.h
index 453cdaee..b288dedf 100644
--- a/eel/eel-canvas.h
+++ b/eel/eel-canvas.h
@@ -115,7 +115,7 @@ extern "C" {
 
     struct _EelCanvasItem
     {
-        GtkObject object;
+        GInitiallyUnowned object;
 
         /* Parent canvas for this item */
         EelCanvas *canvas;
@@ -132,7 +132,9 @@ extern "C" {
 
     struct _EelCanvasItemClass
     {
-        GtkObjectClass parent_class;
+        GInitiallyUnownedClass parent_class;
+
+        void (* destroy) (EelCanvasItem *item);
 
         /* Tell the item to update itself.  The flags are from the update flags
          * defined above.  The item should update its internal state from its
@@ -195,6 +197,8 @@ extern "C" {
     EelCanvasItem *eel_canvas_item_new (EelCanvasGroup *parent, GType type,
                                         const gchar *first_arg_name, ...);
 
+    void eel_canvas_item_destroy (EelCanvasItem *item);
+
     /* Constructors for use in derived classes and language wrappers */
     void eel_canvas_item_construct (EelCanvasItem *item, EelCanvasGroup *parent,
                                     const gchar *first_arg_name, va_list args);