Provides commands that modify the state of the Design Engine.
Package Specification
The application modifies a report design using a set of commands.
Each command does the following:
- Checks the arguments of the call.
- Validates that the requested change is valid.
- Creates an activity record to perform the change in a way
that can be undone.
Most commands have four parts:
- The command class itself.
- An exception thrown if an error occurs. Many exceptions provide
detailed error codes to clearly identify what went wrong.
- The activity record class that records the change in a way that
can be undone and redone.
- A notification event sent to the UI each time the operation is
done, undone or redone.
Related Documentation
The application generally uses the API handle classes to work with a
design. These handle classes use the commands defined here to modify
the design.