WAComponent
Last updated at 3:16 am UTC on 15 September 2017
Part of Seaside. Superclass of Seaside components.
http://www.hpi.uni-potsdam.de/hirschfeld/seaside/tutorial?chapter=4
I am a Presenter with the additional abilities of wrapping myself with Decorations and displaying another Component with #call:.
Call/Answer:
If a sub-Component makes a #call: to another Component, that Component will appear in place of the sub-Component. For example, if an embedded WACounter, stored in an instance variable called myCounter, made a #call: to DateSelector, that DateSelector would appear in the context of the counter's parent, with the 'My Counter' heading above it.
Since an embedded subcomponent has not been #call:'d, in general #answer: is a no-op. However, the parent may attach an #onAnswer: block to the embedded subcomponent to be notified if it sends #answer:. This allows one component to be used both from #call: and through embedding. For example:
initialize
dateSelector := WADateSelector new
onAnswer: [ :date | self dateChosen: date ].
Visibility:
A component is visible if it:
- meets the visibility requirements of a Presenter; or
- is passed as an argument to #call: on a visible component
