2004-07-14  Michael Natterer  <mitch@gimp.org>

	* app/core/Makefile.am
	* app/core/core-types.h
	* app/core/gimppickable.[ch]: new interface which has
	get_image_type(), get_tiles() and get_color_at() methods.

	* app/core/gimpdrawable.[ch]
	* app/core/gimpimagemap.[ch]
	* app/core/gimpprojection.[ch]: implement GimpPickableInterface
	and removed public get_colot_at() functions.

	* app/core/gimpimage-pick-color.[ch]: removed typedef
	GimpImagePickColorFunc and gimp_image_pick_color_by_func(). Use
	gimp_pickable_pick_color() instead.

	* app/core/gimpimage-contiguous-region.c
	* app/core/gimpimage-crop.c
	* app/gui/info-window.c
	* app/paint/gimpconvolve.c
	* app/paint/gimpsmudge.c
	* app/tools/gimpbycolorselecttool.c
	* app/tools/gimpimagemaptool.c
	* app/widgets/gimpselectioneditor.c: use GimpPickable functions
	instead of the various get_color_at() functions. Simplifies code
	which has a "sample_merged" boolean. Various cleanups.