2003-03-03  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimppreviewrenderer.[ch]: removed the constructors
	with a GimpViewable parameter and always create renderers from
	viewable types only. Made gimp_preview_renderer_update() emit only
	the "update" signal and added the new function
	gimp_preview_renderer_invalidate() which does what the old
	_update() did (invalidating and adding an idle function which
	emits "update"). Added gimp_preview_renderer_remove_idle() so
	renderer updating can be fully controlled using public functions.

	* app/widgets/gimppreviewrendererbrush.[ch]: no need to remember
	the widget for the brushpipe animation, simply call
	gimp_preview_renderer_update() in the animation timeout.

	* app/widgets/gimppreview.[ch]
	* app/widgets/gimpcontainertreeview.c: changed accordingly. Call
	gimp_preview_renderer_remove_idle() after setting the initial
	viewable because we will be updated anyway by the first expose.

	* app/widgets/gimppreview.[ch]: Added a size_request()
	implementation. Removed gimp_preview_update(). Added new
	constructor gimp_preview_new_full_by_types() to make the
	constructor API symmetric. Removed code duplication by calling the
	_by_types() constructors from the ones taking GimpViewable
	parameters.

	* app/gui/palette-import-dialog.c
	* app/widgets/gimppropwidgets.c
	* app/widgets/gimpselectioneditor.c: changed accordingly.