Hi Evan,
You are indeed on the edge of what Roassal can do. This is a situation that I
have tried to fix. Please play with the solution I propose and complain if this
is not what you expect.
Try this:
-=-=-=-=-=-=-=-=-=-=-=-=
v := RTView new.
es := RTShape withAllSubclasses collect: [ :cls |
b := RTPieBuilder new.
b interaction popupText.
b objects: cls withAllSuperclasses.
b slice: #numberOfMethods.
b normalizer distinctColor.
b build; asElement.
].
v addAll: es.
RTCellLayout new lineItemsCount: 8; on: es.
v
-=-=-=-=-=-=-=-=-=-=-=-=
It produces the following
Now, you can send the message #asElement to a builder or a view. This message
returns a "compound element” (something new I have recently introduced) which
can freely be added to a view.
Is this what you expect?
It is likely that this mechanism will be a foundation of Roassal3 as nesting is
a recurrent need.
Cheers,
Alexandre
> On Mar 17, 2016, at 9:59 PM, Evan Donahue <emdon...@gmail.com> wrote:
>
> Hello,
>
> I am working with Roassal and trying to write a cell-layout builder that uses
> RTPieBuilders internally as its nested objects. The nesting docs cover
> nesting RT elements, but not builders. The composition docs cover composing
> builders, but not nesting them. I have a partial solution, but it is getting
> increasingly hacky, to the point where it may be easier to just duplicate the
> piebuilder code in my builder. Before I go down that road, I wanted to check
> if there was a more natural way to nest builders.
>
> Below is a mashup of the Roassal Examples Nesting and Pie Chart builders that
> gives the basic flavor of what I am trying to accomplish. Notice that I am
> creating new PieBuilders every time, running them, and extracting their
> createdElements for my layout. This works well enough, but if I then want to
> normalize global properties so that all pie slices with the same property get
> the same color, I have no way to coordinate the newly generated PieBuilders,
> as each possesses its own normalizer. Likewise, if I have a global
> PieBuilder, its internal state gets trampled with each iteration. I figured
> there was likely an easy way to compose builders that I didn't know about, so
> I thought I would ask.
>
> | v es b |
> v := RTView new.
> es := RTEllipse elementsOn: RTShape withAllSubclasses.
> v addAll: es.
>
> RTNest new
> for: es
> add: [ :group :model |
> b := RTPieBuilder new.
> b objects: RTShape withAllSubclasses.
> b slice: #numberOfMethods.
> b normalizer distinctColor.
> b view: v.
> b build.
> group addAll: b createdElements. ].
>
> RTCellLayout new lineItemsCount: 8; on: es.
> v
>
>
> Thanks,
> Evan
--
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
