2004-10-16  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimpitemtreeview.[ch]: moved "item_type" and
	"signal_name" from GimpItemTreeView to GimpItemTreeViewClass.
	Removed them from gimp_item_tree_view_new(). Require the view_type
	instead of item_type in gimp_item_tree_view_new().

	* app/widgets/gimpitemtreeview.c
	* app/widgets/gimpdrawabletreeview.c (get_type): made them
	abstract base classes.

	* app/widgets/gimpchanneltreeview.c
	* app/widgets/gimplayertreeview.c
	* app/widgets/gimpvectorstreeview.c (class_init): set the
	item_type and signal_name members if GimpItemTreeViewClass.

	* app/dialogs/dialogs-constructors.c: changed accordingly.