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1. An overview of JFDraw architecture

    Before you start your own graph drawing application via JFDraw binary library or source code. You can take a quick view of JFDraw architecture.

         Overview of JFDraw Binary Library and Source Code architecture.

    A JFDraw library is consisted by JFDraw GUI, JFGraph infrustructure, JFDraw Utilities and 3rd party utilities.

• JFDraw GUI contains the top level visiable frames, panels and drawing canvas.
   
• JFGraph infrustructure is used for the basic graph processing.
   
• JFDraw Utilities are other assistance for drawing and calculating.
   
• And with 3rd party libraries for some external file formats output, such as eps, swf,cgm,etc.
   

    A graph demonstration of this architecture.

(Click on image to enlarge it)

       MVC architecture in JFDraw.

    Three major parts of JFDraw,JFDraw Canvas & GUI, JFDraw Event and Action dispatcher and JFDraw Infrustructure, consisted the MVC architecture.

       Class diagram of JFDraw.   

    The diagram below is a simple and not complete UML class diagram for JFDraw.

• As described on the diagram, you can use both CADPane or DrawPane class to build your own vector drawing applications. And There are already some samples in this developer's guide that based on DrawPane.
   
• All shapes will be drawn on DrawCanvas class, a DrawCanvas is just a subclass of JPanel.
   
• All shapes are stored temporary in a JFPage object, a JFPage class is used to represent a JFD/JFX JFDraw file in memory and objects model.
   
• JFLayer class is used to seperate different layers within one JFPage.
   
• All shapes are subclasses that are derived from AbstractShape.
   
• An AbstractShape object will always has a NodeList, a PortList, and a Label defined internally.
   
• A NodeList is used to define the outline of a shape. And a PortList is used to define the necessary ports to connect other shapes. And a Label is just a movable text tag for a shape.
   
• Some shapes, e.g. AbstractRectangle, will assemble some internal basic graph objects, such as Rect, LineSeg,JFPoint for graph calculating and processing.
   

(Click on image to enlarge it)

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