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iScreen: a toolkit for interactive screens

With the advent of touch-centric operating systems such as iOS and Android, an ever-increasing number of mobile devices are equipped with touch screens. Several integrated computer systems extend this trend to traditional computers and they provide a cost-efficient hardware platform for a pervasive deployment of interactive displays in a variety of environments. However, to be useful for a particular application scenario, their software needs to be customized. Without further support, this customization can be a time-consuming and costly undertaking which may ultimately limit their applicability. To mitigate this, we have developed the iScreen software toolkit that aims at minimizing the development effort by providing a set of reusable building blocks for interactive applications. In this paper, we present the toolkit's architecture and we describe a number of components that we have implemented on top of it. To validate our work, we present four example applications some of which we have been using on a day-to-day basis over the last two years.