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

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