Graphical Modeling Framework Runtime - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 486

preferred approach. For more information on producing diagrams using the
tooling and extending the generative approach, see Chapter 4 and Chapter 11,
“Graphical Modeling Framework Tooling.”

Figure 10-54 Mindmap generated extension-point contributions

10.9 Extending Diagrams

You learned in Section 4.3.5, “Adding Custom Layout,” that it's possible to
extend an existing diagram through the use of a customization plug-in. In this
case, we were able to add a custom layout to our Mindmap diagram, along with
an Insert Subtopic action using standard Eclipse UI contribution techniques. In
Section 4.6.7, “Custom Parsers,” we similarly were able contribute a custom
parser for attributes in our Color Modeling diagram. In this section, we continue
the extension story and demonstrate how to add custom figures to an existing
diagram. Specifically, we add an SVG version of the BPMN Intermediate Event
node for use in our Scenario diagram.

10.9.1 Scenario Diagram Custom View and Edit Providers

We begin by creating a new plug-in project named org.eclipse.sce-
nario.diagram.custom in our workspace. Add a dependency to our
org.eclipse.scenario.diagram plug-in, along with org.eclipse.
gmf.runtime.diagram.ui and org.eclipse.gmf.runtime.draw2d.
ui.render . To override the default View and EditPart providers in the