2001-02-07  Michael Natterer  <mitch@gimp.org>

	* app/gimpcontext.[ch]: added "set_by_type", "get_by_type" and
	"changed_by_type" methods which take a GtkType and decide from
	that if to manipulate the Brush, Pattern etc.

	* app/gimpcontainerview.[ch]
	* app/gimpcontainergridview.[ch]
	* app/gimpcontainerlistview.[ch]: added a GimpContext to the views
	which is used to manage the active item.

	* app/commands.c: pass the user_context to the test views.

	* app/gimpbrushpreview.c
	* app/gimppatternpreview.c
	* app/gimppreview.[ch]: added a virtual "needs_popup" method which
	returns a boolen indicating if the viewable is already fully
	visible.

	* app/gimage.[ch]: removed gimage_foreach() and some other
	functions which can easily be done be gimp_container_foreach().
	Removed gimage_delete().

	* app/fileops.c
	* app/gdisplay.c
	* app/lc_dialog.c
	* app/nav_window.c
	* app/palette_import.c
	* app/preferences_dialog.c
	* app/xcf.c
	* app/pdb/image_cmds.c
	* tools/pdbgen/pdb/image.pdb: changed accordingly. Switched from
	"disp_count" refcounting to real GtkObject refcounting for
	GimpImages.