Research on operation activity of a special computer pointing device - trackball 一种特殊的计算机指点装置追踪球的操作活动研究
3.
Provides a virtual - trackball alternative for rotating objects . only works in fullscreen mode in main view 在操作物件旋转时提供一组轨迹球供操作，仅能工作于全萤幕的模式下的主视窗。
4.
A designer can work with any number of common input devices - leading electronic whiteboards , trackballs , and so on - and ideogramic s proprietary gesture recognition algorithms convert the sketches into uml diagrams 设计者可以使用任意多的常见输入设备先进的电子白板、轨迹球等ideogramic的专利产品“手势识别”算法将这些草图转换成uml图。
5.
Assistive devices , such as braille display , screen enlargement and voice synthesising software , touch screen and trackball , have been installed to cater for the distinctive needs of special groups such as the elderly and people with disabilities 政府也在电脑安装了点字显示器、屏幕放大软件、语音模拟软件、轻触式显示屏及追踪球等辅助工具，照顾长者及残障人士等的需要。
