In UML models, a call event is
an event that represents the receipt of a request to invoke an operation.
A transition with a call event initiates when the called operation
is invoked.
Before you begin
Before you can add a trigger to
a transition, you must have a state machine diagram open in the
Modeling perspective.
Procedure
- Right-click a transition; then click .
- Complete one of the following steps:
- To create a new call event, click Create Call Event and
complete one of the following steps:
- To create a new call operation, click Create Operation,
type a name, and press Enter.
- To select an existing operation, click Select Existing
Element, and in the Select Element window,
click an operation, and click OK. Type a name
and press Enter.
- To select an existing call event, click Select
Existing Element, and in the Select Element window,
click a call event, and click OK. Type a name
and press Enter.
Results
The call event is added to the transition in the diagram and
in the
Project Explorer view. You can view and
modify details about the call event in the
Properties view,
on the Triggers page for the selected transition.