Developing a DSL Graphical Notation - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 104

4.4 Developing a Requirements Diagram

We want a simple diagram that displays requirements so that we can visualize
their relationships and dependencies. We first develop the diagram to be stand-
alone, and then we integrate it as a tab in the generated EMF editor to illustrate
the approach. Eventually, we want the requirements editor to be primarily form
based.

4.4.1 Diagram Definition

Beginning with the Graphical Definition Model Wizard, we create a new
requirements.gmfgraph model in our /diagrams folder of the
org.eclipse.dsl.requirements project. In the wizard, be sure to select the
Model class as the diagram element. Table 4-11 shows the completed model,
indicating values that changed from their default.

Table 4-11 Requirements Figure Definition

Element Property Value

Canvas Name RequirementCanvas

Figure Gallery Name RequirementGallery

Polyline Decoration Name OpenArrow

Figure Descriptor Name Circle

Rectangle Name CircleOuterRectangle

Fill False

Outline False

Stack Layout

Ellipse Name Circle

Label Name CenterLetter

Basic Font Face Name Arial

Height 10

Style BOLD

Margin Border

Insets Left, Top 6, 5

Child Access Figure Rectangle CircleOuterRectangle