User interface design adaptation

This chapter aims to help user interface designers and developers understand the issues involved in multi-device interactive applications, which can be accessed through mobile and stationary devices, even exploiting different interaction modalities (graphical, vocal, etc.). The chapter provides a discussion of the possible solutions in terms of concepts, techniques, languages, and tools, with particular attention to Web environments. The chapter deals with the various strategies for adapting, distributing, and migrating the user interface according to the context of use. It considers how to address such issues both when authoring multi-device interfaces and when user interfaces for different devices are dynamically adapted, distributed, or even migrated seamlessly across devices to follow the mobile user. Thus, it discusses task continuity across multiple devices in migratory interfaces as well as related usability issues.