Download ActionScript Developer's Guide to PureMVC by Cliff Hall PDF

By Cliff Hall

Achieve hands-on adventure with PureMVC, the preferred open resource framework for constructing maintainable purposes with a Model-View-Controller structure. during this concise consultant, PureMVC author Cliff corridor teaches the basics of PureMVC improvement through jogging you thru the development of a whole non-trivial Adobe AIR software. via transparent factors and various ActionScript code examples, you are going to examine most sensible practices for utilizing the framework's periods on your day by day paintings. realize how PureMVC permits you to specialize in the aim and scope of your program, whereas the framework looks after the plumbing in a maintainable and transportable approach.

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Erecting the Startup Scaffolding As with any project, there is a one time bit of setup work to be done. Once you are familiar with the structure and the standard startup flow (see Figure 2-1), this phase should really take no more than 10 minutes to complete. info Figure 2-1. Typical PureMVC startup sequence with Flex Prepare the Project and Initial Package Structure Using your favorite IDE, create a new Flex Desktop (AIR) project. Out of the box, your Flex/AIR project should have a lib or libs folder where you can place libraries in SWC format to be compiled into your application.

The reason for that is to keep the Model tier portable. It is the combined duty of the View and Controller tiers to ensure that the user is able to interact with the data. Those tiers are both able to directly update the Model tier. The Model tier is only responsible for making the data available. For an actor of the Model tier to become interested in the business of presentation would be overstepping its role and potentially coupling it to one particular application implementation. What this means is that Proxy, Mediator, and SimpleCommand can each send a Notifica tion, but only Mediator and SimpleCommand may receive them.

If the app were not modular, then third parties would not be able to enhance it without access to the source code of the entire application, which you may not wish to give away. MultiCore is a whole level of separation beyond MVC, and while it is extremely powerful, not everybody needs it. There is a small but unavoidable overhead in complexity for the developer that was deemed best implemented in an alternate version of the framework. MultiCore was created, and the existing version was dubbed Standard.

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