【作者】 马晓婷；

【导师】 马义忠；

【作者基本信息】 兰州大学 ， 计算机应用技术， 2012， 硕士

【摘要】 随着计算机网络技术的飞速发展以及教育信息化的不断深入,以提高数学教学质量的辅助系统渐渐走近人们的视线,几何画板(Geometric Sketchpad)便是其中的一种。几何画板为用户提供几何对象以及几何示例等的编辑环境。目前,几乎所有的几何画板都是以软件的形式存在,运行于单机环境,故而不能为用户提供相互交流与共享资源的功能。本文所介绍的GeometryEditor与上述几何画板系统相比,具有显著的优点：GeometryEditor绘图面板嵌入于网页中,用户在客户端通过浏览器访问的形式通过鼠标拖曳操作实现基本几何图形,如点、线段、圆等的绘制以及几何示例的编辑功能。用户也可通过系统提供的各种工具实现基于对象的几何操作,如计算圆的半径与面积以及判断两条直线之间的位置关系等。本文结合了iPad触摸平台的事件响应、触摸手势以及iPad手势操作的特殊性,设计开发出符合触摸平台交互任务要求的PDA GeometryEditor(简称,PGE)系统,该系统是在GeometryEditor的实践基础上将其基本功能和几何操作移植到iPad等手持设备上的产物。本文详细阐述了PGE系统的移植方案,深入探讨了PGE中触摸手势与具体交互任务的映射关系问题,设计出一种符合用户操作习惯的触摸手势与几何操作之间的映射方案。除此之外,本文提炼出PGE系统的三层结构,并通过分析提出了三层结构之间的两级映射模式,从而大大提高了PGE系统的可移植性和跨平台性。更多还原

【Abstract】 With the rapid development of computer networks and the development of educational informationization, kinds of products which aim at improving the quality of mathematic teaching has gradually approached people’s attention, Geometric Sketchpad is a kind of them. Geometric Sketchpad provides users with geometric objects and geometric manipulation editing environment. At present, almost all of the Geometric Sketchpad existing in the form of software, and running on a stand-alone environment, therefore can not provide users with the functionality of the mutual exchange and sharing of resources.Compared to the above Geometric Sketchpad systems, the GeometryEditor this paper introduced has significant advantages:GeometryEditor’s drawing panel is embedded in a website, users can visit the site through a browser client, and edit points, segments, circles and other geometry objects via mouse drag operation. Users also can use the various tools provided by the system to achieve functions such as computing the radius and area of a circle, judge the relationship between two lines, etc.This paper combined the iPad touch platform response events, touches gestures and gesture operation characteristic, designed and developed the PDA GeometryEditor (PGE, for short) system which is the product of transplanted the functions and manipulates of GeometryEditor to the iPad and other touch platform devices. The paper described in detail the transplantion program of the PGE system, in-depth studied the touch gestures and specific interaction task mapping problem, designed a touch gestures and geometric operations mapping program with could better suits PGE users’habits. Besides, this paper extracted PDA GeometryEditor’s three-layer structure, by analyzing the three-layer structure we proposed a two-layer mapping program among the three layers, thus improved the portability and cross-platform ability of PDA GeometryEditor system.更多还原