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玩转Eclipse tools第三部分GEF

摘要: 玩转Eclipse tools第三部分GEF

一、概述<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Graphical Editing Framework (GEF) 是目前为止介绍的最震撼的Eclipse工具了。GEF使用

基于SWT插件Draw2d建立图形环境。对MVC (model-view-controller) architecture感兴趣的赶快研究源代码吧。

先看一个例子震撼一下：
http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/gef-home/images/LogicExample.jpg?cvsroot=Tools_Project

GEF可以用于开发以下应用：

flow builders,

GUI builders,

UML diagram editors (such as work-flow and class modeling diagrams),

WYSIWYG text editors like HTML

参考文档：

The GEF FAQ

Display a UML Diagram using Draw2D Daniel Lee (IBM) August 25, 2003

Using Native Drag and Drop with GEF Eric Bordeau (IBM) August 25, 2003

Create an Eclipse-based Application using the Graphical Editing Framework Randy Hudson (IBM) July 29, 2003

二、GEF主要包括两个部分：

GEF和Draw2d

The Draw2d plug-in provides a standalone rendering and layout package for an SWT Canvas. It includes common shapes and layouts that can be assembled to render almost anything.

Features

Double buffered painting and optimized layouts

Various Figure and Layout implementations

Simple event routing to figures (mouse and keyboard)

Border support on figures

Cursor and tooltip support

Connection anchoring, routing and decorating

Multiple layers

Flexible coordinate systems

Overview window (thumbnail with scrolling)

The GEF plug-in uses Draw2d for rendering, but adds a rich MVC editing framework on top of it. This framework helps ensure that most graphical applications look and behave in a similar way.

Features

Tools like Selection, Creation, Connection and Marquee tools

A Palette for displaying those tools

Handles for resizing objects and bending connections

Two types of GEF Viewers (Graphical and Tree)

A Controller framework for mapping the business Model to a View

Plug-in policies for mapping interactions with the view to changes in the model

Various implementations for showing feedback and adding selection handles

Various request types and tools or actions that send these requests to the controllers

Undo/Redo support via Commands and a CommandStack

三、下载和使用

GEF-SDK-3.0.1.zip

GEF-examples-3.0.1.zip

安装后核实6个plugins:

org.eclipse.draw2d - The Draw2d plug-in

org.eclipse.gef - The GEF plug-in (requires Draw2d)

org.eclipse.draw2d.doc.isv - ISV integrated Help

org.eclipse.gef.doc.isv - ISV integrated Help

org.eclipse.gef.example.logic - A GEF example that shows containers, nodes, and connections.

org.eclipse.gef.example.flow - A GEF example of a flow editor.

注意后面两个例子，当你安装以后，就可以新建两种文件，logic 和 flow ．