Viktoras,
I have not tried this in Rev but I was thinking that you might want to
mix the array with custom props so that the array set the custom props
of the object. The array could build the object and it's properties.
Just a thought.
Others on the list will have more experience with this.
Tom
On Mar 19, 2008, at 8:25 AM, viktoras didziulis wrote:
I would like to define a class, an object (the both with their
properties) and methods that are not a part of graphical user
interface or Revolution engine...
Let's say I need an object "City" having properties: minLatitude,
maxLatitude, minLongitude, maxLongitude, area, populationSize,
growthRate, dateFounded, currentDate so it can be handled using
specific handlers and functions (e.g. its methods). Or, well, it
would be more correct to start with creation of a class "City" or
"templateCity" and then use it to create new "city" objects
(NewYork, Paris, etc...) that can be processed by their functions
like "populationGrowth(Paris, start_year, end_year)" and so on...
The three approaches that I can imagine are somehow inter-tangled:
(1) creating an object as a custom property set of a stack or (2)
creating it as an array or (3) creating it as an invisible control
with custom properties. But all these have their drawbacks.
The (1) and (3) approach allows attaching handlers to custom
properties and allows accessing object (e.g. a custom property set)
properties using both an array notation (somehow an equivalent to an
array-like behavior of objects in javascript) and in a way
consistent with handling of properties in Rev e.g. "set the .. of ..
to ..." or "get .. the .. of ...". Unfortunately (1) allows only a
single object to be active and thus accessible. The (3) is a dirty
one, because object is created using empty controls with their own
additional properties and methods. The (2) looks promising, one can
create a class, write a constructor function that would create new
objects from the class, etc... But it lacks consistency with the
existing OOP style in Rev - e.g. you can not get or set an element
of an array using "get the <element/property> of <array/object>" or
"set the <element/property> of <array/object> to <value>". Besides
you can not use getProp or setProp handlers with array's elements.
Did anyone try doing something like this kind of OOP in Rev? I would
appreciate if you can share your thoughts, warnings, tricks and
approaches :-). I am not looking for a complex C++ like style of OOP
in Rev. Anything simpler like the OOP model of javascript would be
OK. In general, I think, it would be nice if one could treat and
access Revolution arrays as objects with custom properties, with all
the getProp, setProp and templateObject stuff... Or is it possible
somehow? If not, is this already posted to QC as an enhancement
request - I would vote for it? Otherwise going to post it there
myself...
All the best!
Viktoras
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