2001-05-06  Michael Natterer  <mitch@gimp.org>

	* app/gimpimage.[ch]: renamed the "resize" signal to "size_changed".

	* app/gimage.c: changed accordingly.

	* app/undo.c: renamed the "shrink_wrap" to "size_changed", call
	gimp_image_size_changed() and let the handlers do the work.

	* app/widgets/gimplistitem.[ch]: added a virtual set_preview_size()
	method and a default implementation.

	* app/widgets/gimplayerlistitem.c: added an inplementation of
	set_preview_size() which set's the size of the mask preview.

	* app/widgets/gimpchannellistview.c: implement set_preview_size()
	and set the size of the component previews.

	* app/widgets/gimpcontainerlistview.c: call
	gimp_list_item_set_preview_size() instead of resizing the preview
	manually.

	* app/widgets/gimpcontainerview.c: emit "set_preview_size" even if
	the size has not changed so we can use it to re-calculate the
	preview size on image size change.

	* app/widgets/gimpdrawablelistview.c: connect to the image's
	"size_changed" signal and trigger preview size re-calculation in
	the callback.