[jboss-user] [JBoss jBPM] - Re: extending eclipse process designer plugin

[koen.aers@jboss.com]

Hi Paul and Sunil,

Extending the designer is not really easy at the moment. There are a couple of extension points that allow you to do these kinds of things, but they are not documented and will probably change in the future. Have a look at the plugin.xml file of the org.jbpm.gd.jpdl.ui project. 
You will find the 'editPolicies' and 'graphElements' extension points. You can see how they are used in the following excerpts:
      <graphElement
  |             name="state"
  |             contributor="org.jbpm.ui.contributor.StateContributor">
  |          <entry
  |                category="org.jbpm.palette.1.BasicNodeTools"
  |                id="org.jbpm.ui.palette.2.State"
  |                label="State"
  |                tooltip="Creates a State node"
  |                type="node"/>
  |       </graphElement>
  | 
      <editPolicy
  |             id="org.jbpm.ui.NodeComponentEditPolicy"
  |             part="org.jbpm.ui.part.graph.NodeGraphicalEditPart"
  |             policy="org.jbpm.ui.policy.NodeComponentEditPolicy"
  |             role="ComponentEditPolicy"/>
  | 
Certainly the use of the 'editPolicy' extension point (which serves to modify and customize the way graphical objects react to user input) requires a fair amount of GEF knowledge. 

Hopefully this helps.

Regards,
Koen

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