笔式用户界面作为Post-WIMP界面的一种重要形式，成为当前研究的热点之一。基于笔交互的应用程序通常有如下需求：自然统一的风格、个性化界面定制的支持，以及各种终端设备上的移植。为了支持笔交互应用程序快速稳定的开发，提出了一种新的笔交互范式PGIS，以及基于PGIS的应用程序开发平台。PGIS交互范式包含了纸、小工具等交互组件， 定义了各种组件的显示及交互形式。PGIS平台采用模型驱动构架的设计方法，主要包括3个部分：界面的设计工具，PGIS交互引擎，PGIS底层核心库。目前，已经在PGIS平台上开发了几款优秀的笔式交互软件，完全满足上述笔式交互应用程序的需求。PGIS的可行性也因此得到了很好的验证。

In order to reduce the cognitive workload and operation difficulty, this paper utilizes an adaptive human computer interaction strategy based on context awareness, and analyzes its interaction mechanisms and visualizations. A new user interface model is proposed to guide the interface design and prototype development. The model defines different types of channels for context data acquiring, and describes the context information’s functions and logical structures. Adaptation triggering rules and controlling strategies are used to restrict the state transitions during the operation process. Interface modes and their transition functions are defined, and the related visualization presentations styles are described, such as reconstruction, replacement, geometry transition, filter and push. The model constructs the evaluation functions through the different metrics from the user feedback information, and it can help adjust and refine the adaptation mechanism. Finally, a prototype of adaptive user interface for mobile phone contact list is provided, and it supplies users with high efficiency and satisfactions during the user test. It illustrates the feasibility and effectiveness of the proposed user interface model.