UML Designer User's Guide
To add a class design to the diagram, follow these steps:
- Select
Class from the tool bar.
- Place the new figure on the drawing surface.
When first added to the drawing surface, the new figure is labeled with a
question mark. This is because it is not yet associated with any
underlying model element (in this case, a class design).

- Click mouse button 2 on the figure to display its pop-up menu.
- Select Attach from the pop-up menu.
- A window appears prompting you for the class design you want to link
to. The one we want doesn't exist yet, so instead of selecting
from the list of available class designs, type Catalog in the
Specify New Item field at the bottom of the window.
- Select New.
- The next window confirms the name of the new class design, and also
confirms that we want to create a real Smalltalk class in addition to the
class design. From here, you can specify the superclass and the
Smalltalk application for the new class; if you specify a class that
already exists, UML Designer attaches the class design to the existing
class. Accept the defaults and select OK to create the class
design.
The new class design is created and attached to the figure, which is now
labeled Catalog.

When first created, the new class design figure is empty; it does not
show any methods or attributes. If the underlying Catalog class (which
we just created) had any methods or instance variables, they would appear in
the class design figure. (If you want to see the class definition,
double-click on the Catalog class figure, or select Open
With>Class Browser from its pop-up menu, to open a class
browser.) In our case, however, we want to use a protocol to indicate
the interface of the Catalog class.
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