Developing a DSL Graphical Notation - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 142

</propertySection>
</propertySections>
</extension>

The generated class extends the runtime's AdvancedPropertySection
class. This provides the same table style of property view we're trying to replace,
so we can delete the class content and have it extend the provided
AbstractBasicTextPropertySection class, as shown here. This class pro-
vides a simple text field with code that sets up a forms-based property sheet, just
as we wanted. Some changes we've made include the use of a text area and not
a single line text field. Also, we have overridden the unwrap() method to iden-
tify our Requirement s class or edit part properly, ensuring that the sheet will
work when selections are made in both the diagram and tree view.

/**
* @generated NOT
*/
public class RequirementDescriptionPropertySection extends
AbstractBasicTextPropertySection {

@Override
protected String getPropertyChangeCommandName() {
return "RequirementDescriptionChangeCommand";

}

@Override
protected String getPropertyNameLabel() {
return "";

}

@Override
protected String getPropertyValueString() {
String description = ((Requirement)
getEObject()).getDescription();
return description == null ? "" : description;

}

@Override
protected void setPropertyValue(EObject object, Object value) {
((Requirement) getEObject()).setDescription((String) value);

}

protected Text createTextWidget(Composite parent) {
Text text = getWidgetFactory().createText(parent,
StringStatics.BLANK,
SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP);
FormData data = new FormData();