2004-07-29  Sven Neumann  <sven@gimp.org>

	* libgimpwidgets/Makefile.am
	* libgimpwidgets/gimpwidgets.def
	* libgimpwidgets/gimpwidgets.h
	* libgimpwidgets/gimpwidgetstypes.h
	* libgimpwidgets/gimppreviewarea.[ch]: added GimpPreviewArea, a
	replacement for GtkPreview, loosely based on patches from Geert
	Jordaens and David Odin. Fixes bug #144759.

	* plug-ins/common/sharpen.c: use the new widget instead of a
	GtkPreview; saves about 100 lines of rather complex code :)