In
UML models, a signal event represents a specific message that initiates a
transition when an object receives it.
Before you begin
Before you can add a trigger to a transition,
you must have a state machine diagram open in the
Modeling perspective.
About this task
To add a signal event to a transition:
Procedure
- Right-click a transition; then click .
- Complete one of the following steps:
- To create a new signal event, click Create Signal Event and
complete one of the following steps:
- To create a new signal, click Create Signal, type
a name, and press Enter.
- To select an existing signal, 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 signal event, click Select Existing
Element, and in the Select Element window,
click a signal event, and click OK. Type a name and
press Enter.
Results
The signal event is added to the transition in the diagram and in
the
Project Explorer view. You can view and modify details
about the signal event in the
Properties view, on the
Triggers page for the selected transition.