Hook: Removing Items From Container - Button

Requirement

A data container's contents is displayed as a single table, and the ability to remove the selected item is needed.

Method of Adaptation

Enable Feature

Level of Support

Parameter Pattern

HotSpot

Standard User Interaction for Data Management

Hooks used

Define New Strategy For Add Or Remove Button

Participants

SingleTableFormSheet, formSheet , DefaultRemoveCatalogItemStrategy, strategy , FormSheetContentCreator, NewContentCreator

Changes

1. instance formSheet of SingleTableFormSheet.
2. if formSheet displays Catalog's contents:
1. instance strategy of DefaultRemoveCatalogItemStrategy.
3. else:
1. instance strategy of Define New Strategy For Add Or Remove Button [NewStrategy].
4. subclass NewContentCreator Of FormSheetContentCreator.
5. NewContentCreator.createFormSheetContents overrides FormSheetContentCreator.createFormSheetContents :
1. call formSheet.addRemoveButton with parameter strategy.

Constraints

• This hook may only be invoked from the Display Contents Of Container hook.

Comments

• By overriding other methods in DefaultRemoveCatalogItemStrategy you can customize the CatalogItem's removal sub-process.
• If there are both, an add and a remove button, you can also use data.stdforms.SingleTableFormSheet.addEditingButtons .