SWT与JFace实战：构建Eclipse 3.0图形应用程序

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"SWT-JFace-in-Action.pdf" 《SWT/JFace in Action》是由Matthew Scarpino、Stephen Holder、Stanford Ng和Laurent Mihalkovic合著的一本关于如何使用Eclipse 3.0的图形应用程序设计指南。本书是Manning出版社出版的，详细介绍了如何利用SWT和JFace这两个强大的Java GUI API来构建高效且用户友好的界面。 SWT（Standard Widget Toolkit）是Eclipse项目的一部分，它为Java提供了与平台原生GUI组件直接交互的能力，使开发者可以创建与操作系统风格一致的用户界面。SWT提供了丰富的控件集合，包括按钮、文本框、列表、树视图等，同时通过JNI（Java Native Interface）实现了高性能和低级别的操作系统集成。 JFace是建立在SWT之上的一个抽象层，旨在简化GUI开发，减少代码量，提高可维护性。它引入了一些高级概念，如数据绑定、视图模型和控制器模式，以及对SWT组件的封装，比如对话框、表单和视图。JFace提供了一种更加面向对象的方式来构建用户界面，使得代码结构更加清晰，减少了直接操作SWT组件的复杂性。在《SWT/JFace in Action》这本书中，作者深入探讨了如何使用这两个库来设计复杂的图形应用。他们详细讲解了如何创建窗口、布局管理、事件处理、数据模型以及对话框的实现。书中还可能涵盖了 SWT 和 JFace 的高级特性，如拖放支持、国际化和本地化、数据库连接、以及利用Eclipse插件系统扩展应用功能的方法。此外，书中还会介绍如何利用SWT和JFace的组合来实现应用程序的可移植性和可扩展性，让开发者能够轻松地跨平台开发。读者还可以期待一些实际的示例代码和最佳实践，帮助他们在自己的项目中快速上手并避免常见问题。《SWT/JFace in Action》是一本面向Java GUI开发者的实用指南，它不仅提供了SWT和JFace的基础知识，还深入讨论了这两者在实际开发中的应用，是提升Java图形界面编程技能的理想参考资料。

xvi

acknowledgments

The authors would like to acknowledge and thank the people who made this book

a reality:

First, we'd like to express our appreciation to Marjan Bace, publisher of Man-

ning, for this opportunity, and to his staff, Clay Andres, Susan Capparelle, and

Dave Roberson, for their support throughout the process. Our heartfelt thanks go

to Jacquelyn Carter, our beleaguered and ever-patient developmental editor who

put up with all our whining and last-minute changes. We particularly want to rec-

ognize the hard work put in by the production team: Mary Piergies, Tiffany Tay-

lor, and Tony Roberts. Their efforts have provided the professionalism and polish

that has kept this book to its high production standard.

Next, we want to extend our sincere appreciation to our diligent reviewers: Phil

Hanna, Christophe Avare, Frank Jania, Ted Neward, Dan Dobrin, Ryan Lowe,

Steve Gutz, Carl Hume, Ed Burnette, Charles Bundy, and Robert McGovern. Their

feedback and encouragement helped us tremendously and in many cases guided

the direction of the book’s content. We’re particularly grateful for the technical

reviewing of Phil Hanna. There’s nothing worse than a programming book with

poor code, and his exacting tests ensured that our code will work as promised.

We also want to thank the Eclipse.org community in general. Not only have

they produced a quality product, but this book wouldn’t be possible without their

dedication to technical support. Their programmers have promptly and thor-

oughly answered our many questions, and their documentation has provided a

great deal of assistance. Of course, we’re also indebted to the Eclipse developers

Licensed to jromero <jose.romero@galicia.seresco.es>

ABOUT THIS BOOK xix

add another tab. Where the initial chapters develop the foundation of the appli-

cation, the code for the later chapters can stand on its own without needing that

from the preceding chapters. We hope this approach lets you focus on the topics

that are of particular interest to you, using the framework of the Widget Window

application to play with the code and see the effects of different parameters on

each component.

Beyond a general introduction to the tools, we cover several specific aspects of

SWT/JFace:

■

The relationship between SWT and JFace—When you first approach these two

libraries, it’s difficult to know when to use one over the other, or why JFace

exists. We explain the seeming redundancies between the two libraries and

demonstrate the trade-offs in coding with one or the other.

■

Rules of thumb concerning GUI development—Having used these tools exten-

sively, we’ve found a number of routines that simplify the process of creat-

ing

GUIs. We’ve also encountered a number of places where SWT/JFace’s

operation differs from its documentation. In each case, we provide explana-

tions and practical examples to help you avoid these pitfalls and create reli-

able SWT/JFace applications.

■

Cross-platform development—Between SWT and JFace, you can find many dif-

ferent ways to build the same user interface. However, some methods trans-

late well across operating systems, and some don’t. Throughout this book,

we present screenshots on multiple windowing platforms to show you how

your application will appear.

■

Practical code examples—When we came up with the example code in this

book, we held two priorities in mind: We kept them concise, for hands-on

readers; and we made them modular, so you can use them in SWT/JFace

applications you build in the future.

■

Toolsets that build on SWT/JFace—We’re excited to present the first thorough

walkthrough of the Draw2D and Graphical Editor Framework (

GEF)

toolsets. These libraries, which build on the capabilities of

SWT and JFace,

greatly extend the power and flexibility of

GUI design.

Chapter 1, “Overview,” presents the history of

SWT and JFace and places these tech-

nologies in context. We present an overview of the history of graphical user inter-

face development using Java and discuss the organization of the various classes

and packages within

SWT and JFace.

Chapter 2, “Getting started with SWT/JFace,” shows you how to set up a project to

use

SWT and JFace, either within the Eclipse IDE or as a standalone project built

Licensed to jromero <jose.romero@galicia.seresco.es>

xx ABOUT THIS BOOK

from the command line. After showing how to implement a traditional “Hello

World” application using

SWT and JFace, we introduce the basic framework on

which the Widget Window will be built.

Chapter 3, “Widgets: part 1,” discusses the inheritance hierarchy used by the SWT

and JFace classes. We also discuss several concepts common to all widgets within

SWT and show how to use some basic, common widgets such as buttons and labels.

Chapter 4, “Working with events,” explains how to enable your application to

react appropriately when the user takes an action such as clicking a button on the

screen. We show the details of low-level event classes in both

SWT and JFace and

discuss the higher-level Action framework that makes handling events easier.

Chapter 5, “More widgets,” dives back in to the discussion of individual compo-

nents provided by

SWT. Most important, we discuss how to let users edit text

within your application, and we cover a variety of useful widgets that are often

used in user interfaces.

Chapter 6, “Layouts,” takes a break from the details of individual widgets to dis-

cuss ways to organize widgets on the screen. After covering the built-in layout

managers provided by

SWT, we show how to create a custom layout manager if the

default ones don’t meet the needs of your application.

Chapter 7, “Graphics,” covers low-level SWT facilities for drawing graphics by

hand. In addition, we show how to programmatically manipulate colors, fonts,

and images from within

SWT.

Chapter 8, “Working with trees and lists,” introduces the Viewer framework, a set

of classes and interfaces provided by JFace to make working with data easier. We

use this discussion of viewers and their related classes to show you how to easily

work with tree and list widgets.

Chapter 9, “Tables and menus,” continues the Viewer framework discussion from

chapter 8 and includes several advanced features of the framework. We show how

these features enable you to create tables that users can easily and intuitively edit.

The chapter ends with a discussion of menus and how they tie into the action

classes from chapter 4.

Chapter 10, “Dialogs,” covers ways to create dialog boxes in both

SWT and JFace.

We discuss the dialog boxes provided by

SWT and JFace and show how to create

your own dialogs when necessary.

Chapter 11, “Wizards,” shows how to use the framework provided by JFace to

create a wizard that guides the user through a series of steps.

Chapter 12, “Advanced features,” covers a variety of miscellaneous features. These

are important topics to understand in order to fully master

SWT and JFace, but

they aren’t essential to get a basic application running. We discuss subjects such as

Licensed to jromero <jose.romero@galicia.seresco.es>

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