Hook: Define new FormSheet for point of sale

Requirement

A FormSheet needs to be defined for a SalesPoint so that the application user can trigger processes by pressing buttons in the FormSheet. Also, general information (e.g. a menu in a restaurant application) can be presented to the application user or a password can be demanded.

Method of Adaptation

Augment feature

Level of Support

Parameter Pattern

HotSpot

FormSheets

Hooks used

Define a FormSheet

Participants

SalesPoint, NewSalesPoint

Changes

1. subclass NewSalesPoint of SalesPoint.
2. NewSalesPoint.getDefaultFormSheet overrides SalesPoint.getDefaultFormSheet .
3. NewSalesPoint.getDefaultFormSheet returns Define a FormSheet [FormSheet].
4. Add a new point of sale [NewSalesPoint = NewSalesPoint].

Comments

• A SalesPoint's FormSheet is displayed in the SalesPoint's display while no process is running.