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 elementâ (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 <emdonahu@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 ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
