2002-12-02  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpdata.[ch]: use GError for reporting load/save
	errors. Added gimp_data_error_quark() and a GimpDataError enum.
	Made simple virtual functions out of save(), get_extension()
	and duplicate() because they don't need to be signals.

	* app/core/gimpbrush.[ch]
	* app/core/gimpbrushgenerated.[ch]
	* app/core/gimpbrushpipe.[ch]
	* app/core/gimpgradient.[ch]
	* app/core/gimppalette.[ch]
	* app/core/gimppattern.[ch]: changed accordingly. Set data->dirty
	to FALSE in each _load() function.

	* app/core/gimpdatafactory.[ch]: report GError messages here.
	Changed the ugly factory->path pointer location hack to
	factory->path_property_name and get the path from
	factory->gimp->config. Added gimp_data_factory_data_duplicate()
	implementation which was already declared in the header.

	* app/core/gimp.c: pass the path property name to
	gimp_data_factory_new().

	* app/widgets/gimpdatafactoryview.c: removed the duplicate
	implementation and call gimp_data_factory_data_duplicate().

	* app/core/gimpgradient.[ch]: added gimp_gradient_save_as_pov().

	* app/gui/gradients-commands.c: removed save_as_pov implementation
	and call gimp_gradient_save_as_pov().