Presentation–abstraction–control
Presentation–abstraction–control (PAC) is a software architectural pattern. It is an interaction-oriented software architecture, and is somewhat similar to model–view–controller (MVC) in that it separates an interactive system into three types of components responsible for specific aspects of the application's functionality. The abstraction component retrieves and processes the data, the presentation component formats the visual and audio presentation of data, and the control component handles things such as the flow of control and communication between the other two components.[1]
In contrast to MVC, PAC is used as a hierarchical structure of agents, each consisting of a triad of presentation, abstraction and control parts. The agents (or triads) communicate with each other only through the control part of each triad. It also differs from MVC in that within each triad, it completely insulates the presentation (view in MVC) and the abstraction (model in MVC). This provides the option to separately multithread the model and view which can give the user experience of very short program start times, as the user interface (presentation) can be shown before the abstraction has fully initialized.
History
PAC was initially developed by France computer scientist, Joëlle Coutaz in 1987.[2][3] Coutaz founded the User Interface group at the Laboratoire de Génie Informatique of IMAG.[4]
See also
- Action Domain Responder
- Hierarchical model–view–controller
- Model–view–presenter
- Model–view–viewmodel
- Presenter First
- PAC-Amodeus[5][6][7]
Notes
- ↑ Kai, Qian (2009). "Interaction-oriented Software Architectures". Software Architecture and Design Illuminated. Jones and Bartlett Illuminated. pp. 200. ISBN 978-0-7637-5420-4.
- ↑ "Coutaz, Joëlle" (in en-US). Encounters with HCI Pioneers - A Personal Photo Journal. 2015-12-05. https://hcipioneers.wordpress.com/portfolio/coutaz-joelle/.
- ↑ Coutaz, Joëlle (1987-10-01). "PAC". ACM SIGCHI Bulletin 19 (2): 37–41. doi:10.1145/36111.1045592. ISSN 0736-6906.
- ↑ Unger, Claus; Bass, Leonard J. (2016-01-09) (in en). Engineering for HCI. Springer. pp. 43. ISBN 9780387349077. https://books.google.com/books?id=RiV8CwAAQBAJ&q=Jo%C3%ABlle+Coutaz+pac&pg=PA43.
- ↑ Nigay, Laurence; Coutaz, Joëlle (1991). "Building User Interfaces: Organizing Software Agents".
- ↑ Nigay, Laurence (January 1994) (in fr, en). Conception et modélisation logicielles des systèmes interactifs : application aux interfaces multimodales. PhD dissertation, 315 pages, University of Grenoble, France. pp. 131–268. http://iihm.imag.fr/publs/1994/THESE1994_Nigay.pdf.
- ↑ Nigay, Laurence; Coutaz, Joëlle (1997). "Software Architecture Modelling: Bridging Two Worlds Using Ergonomics and Software Properties". Formal Methods in Human-Computer Interaction. Springer-Verlag. pp. chapter 3, pp. 49–73. ISBN 978-3-540-76158-7. http://iihm.imag.fr/publs/1997/FormalMethodChapNigay97.pdf.
References
- Coutaz, Joëlle (1987). "PAC: an Implementation Model for Dialog Design". in Bullinger, H.-J.. North-Holland. pp. 431–436. http://www.interaction-design.org/references/conferences/interact_87_-_2nd_ifip_international_conference_on_human-computer_interaction.html#objectType_journalArticleInConfProceedings__objectID_7547.
- Buschmann, Frank; Meunier, Regine; Rohnert, Hans; Sommerlad, Peter; Stal, Michael (1996). Pattern-Oriented Software Architecture Vol 1: A System of Patterns. John Wiley and Sons. pp. 145–168. ISBN 978-0-471-95869-7.
- Calvary, Gaëlle; Coutaz, Joëlle; Nigay, Laurence (1997). "From Single-User Architectural Design to PAC*: a Generic Software Architecture Model for CSCW". in Pemberton, Steven. pp. 242–249. http://www1.acm.org/sigs/sigchi/chi97/proceedings/paper/jcc.htm. Retrieved 2006-05-24.
- Coutaz, Joëlle (1997). "PAC-ing the Architecture of Your User Interface". Springer Verlag. pp. 15–32. http://iihm.imag.fr/publs/1997/DSVIS97_PACing.pdf.
- Markopoulos, Panagiotis (1997). A compositional model for the formal specification of user interface software. PhD thesis, Queen Mary and Westfield College, University of London. p. 26. http://www.idemployee.id.tue.nl/p.markopoulos/downloadablePapers/PhDThesisPanosMarkopoulos.pdf. Retrieved 2006-05-25.
- Avgeriou, Paris; Zdun, Uwe (2005). "Architectural patterns revisited – a pattern language". pp. 1–39. http://eprints.cs.univie.ac.at/2698/1/ArchPatterns.pdf.
External links
- Architectural outline for the game Warcraft as it might be implemented using the PAC Architectural Pattern: Programming of the application PACcraft:Architecture (in French)
- Pattern:Presentation-Abstraction-Control (pattern description)
- PAC description in the Portland Pattern Repository
- WengoPhone is a free software VoIP application that is written using the PAC design pattern.
- description of PAC and motivation for use in WengoPhone.
- demonstration code, courtesy of the OpenWengo community.
- Cai, Jason; Kapila, Ranjit; Pal, Gaurav (2000-07-21). "HMVC: The layered pattern for developing strong client tiers". JavaWorld. https://www.infoworld.com/article/2076128/hmvc--the-layered-pattern-for-developing-strong-client-tiers.html.
 |  |
