gtk-render-activity (context cr x y width height)

context -- a gtk-style-context object
cr -- a cairo-t context
x -- a number, coerced to a double float, with a x origin of the rectangle
y -- a number, coerced to a double float, with a y origin of the rectangle
width -- a number, coerced to a double float, with a rectangle width
height -- a number, coerced to a double float, with a rectangle height

Renders an activity area such as in the gtk-spinner widget or the fill line in the gtk-range widget. The :active state of the gtk-stage-flags flags determines whether there is activity going on.