Abstract
This paper introduces a new Graphical User Interface (GUI) and Interaction framework based on the Entity-Component-System model (ECS). In this model, interactive elements (Entities) are characterized only by their data (Components). Behaviors are managed by continuously running processes (Systems) which select entities by the Components they possess. This model facilitates the handling of behaviors and promotes their reuse. It provides developers with a simple yet powerful composition pattern to build new interactive elements with Components. It materializes interaction devices as Entities and interaction techniques as a sequence of Systems operating on them. We present Polyphony, an experimental toolkit implementing this approach, and discuss our interpretation of the ECS model in the context of GUIs programming.
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