华中农业大学本科毕业论文（或设计）
基于QT的嵌入式终端应用程序开发
——记事本和电子相册开发
摘 要
越来越多的嵌入式终端需要一个图形化的人机接口界面（GUI），良好的人机交互界面是嵌入式系统设计的一个关键技术，尤其是在嵌入式手持设备中，对嵌入式终端的实用性、美观性和视听娱乐性提出了更高的要求。而记事本和电子相册以其实用性和良好的观赏性逐渐成为嵌入式设备中不可或缺的组成部分。开发基于嵌入式终端的界面美观、功能丰富、交互性好的记事本和电子相册，具有一定的实用意义和价值。
本文的目标是设计和实现嵌入式终端下的记事本和电子相册。论文首先介绍了Linux的优点和Qt开发环境的搭建，着重分析了Qt在软件开发中的编程机制。并根据嵌入式应用的特点对嵌入式终端下的记事本和电子相册进行了设计需求分析、具体界面的设计和整体结构的设计。本课题根据记事本和电子相册的算法，设计并实现了记事本的相关功能（如：新建、打开、编辑和删除文件等）和电子相册的相关功能(如：图片放大、缩小、旋转和移动等）。最后对关于论文进一步工作的方向进行了简要的讨论。
关键词
嵌入式Linux； Qt； 图形用户界面； 记事本； 电子相册
I
华中农业大学本科毕业论文（或设计）
Embedded terminal application program development based on QT
——Development of notepad and electronic album
Abstract
More and more embbeded Embedded Terminal need graphics user interface(GUI). A good Human-Computer Interaction interface is the key technology of embedded system design. Higher demands of the practicality, aesthetics and audio-visual entertainment of embedded terminal are needed, especially in embbeded system handheld device. Notepad and electronic photo album are becoming an integral part of embedded device for their pracicality and good viewing. It has some practical significance and value to develop a notepad and an album with beautiful interface, rich functions and good interaction based on embedded terminal.
The aim of this paper is to design and implement a notepad and an album in the embeded terminal environment. This paper presented the advantage of Linux and the building of QT developing environment, focused on the programming mechanism of developing software with Qt. It analysed the needs of the design, designed the specific interface and overall structure of notepad and album in the embeded terminal environment according to features of embedded application.This project designed and implemented the relevant functions of norepad(such as new file,open file ,edit file and delete file) as well as the relevant functions of album(such as enlarge 、minify、 rotate and move the picture) based on the algorithms of notepad and album. Finally, brief disscusion about the further reaserch of this paper was presented.
Key words
Embedded Linux；Qt；GUI；notepad；alb
II
华中农业大学本科毕业论文（或设计）
目 录
目 录 ........................................................................................................................................... I 摘 要 ......................................................................................................................................... I 关键词 ......................................................................................................................................... I Abstract ..................................................................................................................................... II Key Words ................................................................................................................................. II 1 前言 ........................................................................................................................................ 6 1.1 课题研究背景和意义 ...................................................................................................... 6 1.2 嵌入式软件技术发展现状与未来 .................................................................................. 6 1.2.1 标志性的嵌入式产品已露头角 ............................................................................... 6 1.2.2 嵌入式软件技术面临挑战 ....................................................................................... 7 1.2.3 影响未来的若干软件新技术 ................................................................................... 7 1.3 课题研究内容 .................................................................................................................. 8 2 Linux和Qt简介 .................................................................................................................... 9 2.1 Linux主要特性 ................................................................................................................ 9 2.2 QT开发工具简介 ............................................................................................................ 9 2.2.1 Qt主要特性 ............................................................................................................... 9 2.2.2 Qt编程机制简介 ..................................................................................................... 10 3 嵌入式终端应用程序之记事本和电子相册架构设计 ...................................................... 12 3.1 记事本架构设计 ............................................................................................................ 13 3.1.1 记事本设计需求 ..................................................................................................... 13 3.1.2 记事本界面设计 ..................................................................................................... 14 3.1.3 记事本结构设计 ..................................................................................................... 17 3.2 电子相册架构设计 ........................................................................................................ 18 3.2.1 电子相册设计需求 ................................................................................................. 18 3.2.2 电子相册界面设计 ................................................................................................. 19 3.2.3 电子相册结构设计 ................................................................................................. 22 4 算法设计和实现 .................................................................................................................. 23 4.1 记事本主要算法设计和实现 ........................................................................................ 23
III
华中农业大学本科毕业论文（或设计）
4.1.1 记事本类结构设计 ................................................................................................. 23 4.1.2 记事本功能实现 ..................................................................................................... 24 4.2 电子相册主要算法设计和实现 .................................................................................... 29 4.2.1 电子相册类结构设计 ............................................................................................. 29 4.2.2 电子相册功能实现 ................................................................................................. 29 5 总结和展望 .......................................................................................................................... 36 参考文献 .................................................................................................................................. 38 致 谢 ........................................................................................................................................ 39
IV
华中农业大学本科毕业论文（或设计）
V
