28 Mar
2015
28 Mar
'15
10:26 a.m.
Could you compare this what we did with description builders in QCMagritte?
QCObject>>magritteDescription
|basicDescription builders|
basicDescription := self basicMagritteDescription.
builders := self magritteDescriptionBuilders.
builders ifNotNil: [^builders buildFrom: basicDescription target:
self].
^basicDescription
QCContainerComponent>>magritteDescription
^magritteDescription ifNil: [
| model builder |
builder := description descriptionBuilder.
builder ifNil: [ ^description].
model := self model.
magritteDescription := builder buildFrom: description target:
model model: self model model.
self setMemento: (model mementoClass model: model description:
magritteDescription).
magritteDescription ]
Stephan
On 26/03/15 14:25, Sean P. DeNigris wrote:
Should or could the MADescriptionMorph hierarchy
use/inherit-fro MAVisitor?
"Magritte Meta-Described Web Application Development" says "Custom
Rendering... Sometimes other layouts are more convenient, for example the
widgets should be laid out from left to right with the labels on top...
Magritte allows one to define one’s own builder by subclassing a Visitor and
overriding some of the methods used to place the user interface elements".
With the current implementation, it seems one would have to hack the
MADescriptionMorph classes themselves for that kind of change, but if a
visitor was used, they could just supply a custom visitor class, no?
-----
Cheers,
Sean
--
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