25 Jul
2015
25 Jul
'15
10:52 p.m.
Okay!
Alexandre
On Jul 25, 2015, at 10:46 PM, Peter Uhnák
<i.uhnak(a)gmail.com> wrote:
Hi Alex,
On Sat, Jul 25, 2015 at 10:02 PM, Alexandre Bergel <alexandre.bergel(a)me.com>
wrote:
Hi Peter!
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
Basically I want to have either:
a) option to execute behavior when element is added to view --- this is basically direct
counterpart to TRRemovedCallback.
So I could do things like...
element addCallback: (TRAddedCallback: [ :shape | "add dependent elements or
whatever" ]).
Sure, easy. I have just committed this. Update Trachel and you can do (this is a test I
wrote):
Excellent, thank you!
b) have RTInteractions be lazily initialized ---
only after the element has been added to the view.
(or both)
This is a bit more problematic. I am not sure about it.
The idea is to have more clearly resolvable
interactions like RTLabelled, which currently requires for the element to be already in
the view.
I'm not sure if the second option will be entirely feasible, because many of the
interactions are stateless and require immediate evaluation... but that could be resolved
with some flags or different subclassing or something...
Is it possible for you? Is this something you want in Roassal?
Are these lazy interactions something you need just for the added callback? Or is it
something you need for other needs?
TRAddedCallback is generic so I can easily use it for lazy interactions...
imagine for example
RTLabelled>>initializeElement: anElement
anElement view
ifNil: [ anElement addCallback: (TRAddedCallback: [ :evt | self
lazyInitializeElement: anElement ]) ]
ifNotNil: [ self lazyInitializeElement: anElement ]
and then you can remove the el view ifNil: [ self error: 'You are trying to use
RTLabelled ].error checking.
So TRAddedCallback is good for both scenarios.
Thank you!!
Peter
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