-    gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
-      GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
-
-    wxSize size_best( DoGetBestSize() );
-    wxSize new_size( size );
-    if (new_size.x == -1)
-        new_size.x = size_best.x;
-    if (new_size.y == -1)
-        new_size.y = size_best.y;
-    if (new_size.y > size_best.y)
-        new_size.y = size_best.y;
-    if ((new_size.x != size.x) || (new_size.y != size.y))
-    {
-        SetSize( new_size.x, new_size.y );
-        
-        // This is required for tool bar support
-        gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
-    }
+    if (style & wxCB_READONLY)
+        gtk_entry_set_editable( GTK_ENTRY( combo->entry ), FALSE );