eta-gestemas | System-wide Multitouch Gesture Recognition Application

eta-gestemas is a C++ library. eta-gestemas has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

This project is yet another attempt to bring global multitouch gesture reconizers to GNU/Linux desktop environments. In those desktop environments, there are few applications that has native touch event support, but a large number of applications written for keyboard and mouse interactions only. For touch enabled devices, there is currently no support for multitouch gestures, such as pinch and rotate, on those legacy applications. One approach to control legacy applications with multitouch gestures is that we first recognize those gestures and send keyboard-mouse event combinations to those legacy applications. There are a number of programs doing this quite well on laptops with high-quality touchscreens or touchpads, but they did not do very well on low-cost, non-hid optical touch interactive white boards. User experience on these interactive white boards with existing multitouch global gesture recognizer programs, such as Touchegg and ginn, was not quite satisfactory. It is probably due to the high amount of noise factor. We observed that even a small pinch with these programs ended up with a huge zoom on the target client window. One of our requirements is to have a long press gesture triggering a right click event on the target window. Existing programs do not meet this requirement either. They are based on libgeis, which does not support long press gesture recognition, and neither does its backend libgrail. Another drawback with existing programs is that it is not possible to have a kind of private window which is not affected by global gestures, so that only the local gestures for that specific window are in effect. Applications with native touch support are good candidates to be private windows. We do not want their native gestures to get blocked by our global gestures. eta-gestemas is designed all of these requirements in mind. Having spent some time on existing projects' source code, cheifly Touchegg, ginn and Gestouch, eta-gestemas adopted the way Gestouch implements the gesture recognizers.