Perforce JViews Diagrammer Code Example: Graph Layout Sample 3

Description

This example shows how to use graph layout inside a diagram component by loading a style sheet.

How to Run the Code Example as an Application

This code example can be run as an application. The installation directory contains an executable JAR file, diagrammer-layout-sample3.jar, that allows you to execute the code example with a double click from a file browser. Note that if you are using Internet Explorer, you can open the installation directory and execute the JAR file from the browser. This technique may not work in other Web browsers.

Alternatively, you can run the code example application from the command line. First check that the Ant utility is properly configured. If not, see the instructions on how to configure Ant for Perforce JViews.

Then, go to the installation directory of the code example and type:

ant run

Topics Covered

• Use the Graph Layout facility in the diagram component.
• Use the Graph Layout API directly without mutable style sheets.

Detailed Description

This example shows how to use graph layout inside a diagram component with changes to layout parameters. It shows how to bypass the style sheets when changing layout parameters: it calls the layout parameter API on the graph layout instance directly. Layout parameter modifications on the graph layout instance are automatically undone when the style sheet changes or is reloaded, therefore this mechanism is not well suited for permanent layout parameter settings.

Installation Directory

The Graph Layout Sample 3 code example is installed here.

Classes Involved

• ilog.views.diagrammer.IlvDiagrammer

  The main class of the diagram component.

• ilog.views.graphlayout.IlvGraphLayout

  The root class of the Graph Layout package.

• ilog.views.graphlayout.tree.IlvTreeLayout

  The tree layout class.

Source Files

• Sample3

  The entry point of the example.