2000-02-22  Michael Natterer  <mitch@gimp.org>

	* app/gimpcontext.[ch]: it's more intelligent to implement the
	parent_context stuff with gtk_signal_connect_object() instead of
	having internal callbacks for each context attribute.
	Exported the existing gimp_context_*_changed() functions and
	changed them to do nothing but emitting the signal.

	* app/app_procs.c
	* app/tools.c
	* app/transform_tool.c: use gimp_context_tool_changed() instead of
	gtk_signal_emit_by_name().