2006-06-09  Michael Natterer  <mitch@imendio.com>

	* gtk/gtkrange.c: added new style properties "trough-side-details"
	and "draw-trough-under-steppers" and fixed the "stepper-spacing"
	style property. Fixes bugs #342339 and #342249.

	"draw-trough-under-steppers", when set to FALSE, starts trough
	drawing next to the steppers instead of drawing the trough "below"
	(around) the steppers. If "stepper-spacing" is set to any value
	larger than zero, "draw-trough-under-steppers" is set to FALSE
	automatically to avoid rendering an area that looks clickable but
	isn't.

	(gtk_range_calc_layout): honor draw-trough-under-steppers.
	Don't reserve stepper-spacing on sides of the range that don't
	have steppers.

	(gtk_range_expose): changed drawing accordingly. Implement
	"trough-side-details" which enables drawing of the upper and lower
	parts of the trough with different details. This is useful for
	theme engines which want to draw these parts differently.

	(coord_to_value): correctly take all rendering options into
	account. stepper-spacing > 0 caused jumping and otherwise
	strangely behaving ranges before.

	(other functions): changed accordingly.