SUpporting distributed, concurrent, one-way constraints in user interface applications

摘要

This paper describes Doppler a new, fast algorithm for suporting conurrent, one-way constraints between objects situated in multiple address spaces. Because of their decalative nature, convenience, low amortizedcost, and good match to interface tasks, constraints have been used to support a variety of user=interface activities. Unfortunately, nearly all existing constraint maintenance algorithms are sequential in nature, and cannot function effectively in a concurrent or distributd setting.