Programmer's Reference
addDependent:, broadcast:, broadcast:with:,
changed, changed:, dependents, release, removeDependent:,
update:
Note: | For details on the dependents mechanism see Chapter 14 of the Blue
Book. The dependents mechanism is really a legacy from earlier
Smalltalk graphics implementations. It was used to force updates in
cases where several windows provided views on the same object or several
closely related objects. It is no longer used in modern GUI systems
like Common Graphics and Common Widgets. Consequently, we have included
only the basic protocol in CLDT.
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Porting tip: | All Smalltalk dialects use the same basic messages to implement the
dependents mechanism, with one exception: Smalltalk/V does not support
removeDependent:. Both Smalltalk/V and
Objectworks\Smalltalk provide a number of additional (and
different) messages that extend the basic mechanism.
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