+ /* This cursor is not intended to be used directly, it just
+ serves as an out-of-bounds value when we need to indicate
+ "no cursor". NULL/0 doesn't work for this, because it
+ is actually a valid value for a Gdk::Cursor - it indicates
+ "use the parent window's cursor"
+ */
+
+ static bool is_invalid (Gdk::Cursor* c) { if (!_invalid) { create_invalid(); } return c == _invalid; }
+ static Gdk::Cursor* invalid_cursor() { if (!_invalid) { create_invalid(); } return _invalid; }
+