JLOW - Java Libraries fOr Workflow - Release 1.0

Author : Cyril Pestel - Read before any use of available Java classes

Requirements

JAVA J2SE Development Kit (JDK) 1.4 or later
Use the last version of JLOW
JGraph library is needed and available at http://www.jgraph.com (download the free library)

In a first step we will use JLOW in a very simple application in which the Workflow is just one box.

You must create the window in which the Workflow will be displayed :

public HelloWorldFrame() {

Container content = getContentPane();

content.setLayout(new BorderLayout());

setSize(400, 300);

setTitle("Hello World");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

Don't forget the main :

public static void main(String args[]) {

HelloWorldFrame frame = new HelloWorldFrame();

frame.setVisible(true);

}

You must create a GraphJ object which offer the display zone of the Workflow :

IRegisterer register = new Registerer();

GraphJ graph = new GraphJ(register);

content.add(graph, "Center");

You must create a descriptor for your task Hello World and specify its display features with an Attributs object :

Attributs atts = new Attributs("AttHW", new Color(141, 90, 99), Attributs.TASK, new Dimension(80, 100));

atts.putAtt(Attributs.GRADIENTCOLOR, new GradientPaint(0, 0, new Color(141, 90, 99), 175,175, new Color(255, 255, 255, 200), true));

register.putAtt("CatHW", atts);

Creation of a descriptor for “Hello World” and adding to the registry :

TaskDescriptor desc = new TaskDescriptor("Hello World", "CatHW");

register.putDescriptor("Helloworld", desc);

The task is now known from the graph and it can be inserted with insert method (of GraphJ) :

graph.insert(new Point(10,10), "Helloworld");

Execute your application :

Sample

Remark : the "Name : Hello World" is only shown when the mouse is on the bow "Hello World".