Download Advanced ActionScript 3 with Design Patterns by Joey Lott PDF

By Joey Lott

State-of-the-art ActionScript-based purposes require more and more subtle architectures and code. This ebook aids intermediate and complicated ActionScript builders in studying the way to plan and construct purposes extra successfully. you are going to how to observe layout styles as recommendations to universal programming situations. past a reference, complex ActionScript with layout styles is a realistic consultant entire with pattern mini-applications illustrating each one layout development. The accompanying CD incorporates a trial model of Flash eight in addition to all of the lesson documents had to paintings with the textual content.

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Although it is possible to have a controller that uses several views, it is far more common that the relationship between view and controller is one-to-one. The view contains all the user interface elements through which the user interacts. Yet the controller is the element that responds to user input. In many, if not most, ActionScript applications, the view and the controller are one class. This variation of the MVC pattern is often called a Document View implementation of MVC. The most important key to the MVC pattern is that the model must be an independent object that does not have a reference to the view or controller.

Super(data); // Create the clock face, and draw a circle. drawCircle(0, 0, 100); addChild(_face); // Create the hands. lineTo(0, -80); addChild(_secondHand); // Call the draw() method to draw the initial view. draw(); } // Override the draw() method. This method gets called once // when the object is constructed, and then it gets called // every time the model dispatches a change event. time; // Set the rotation of the hands based on the time // values. second; } } } Testing the Analog Clock The remaining step in the first part of this exercise is to see whether the analog clock really works.

Because you've declared item as type Vegetable, you can assign to it only those objects that are instances of class Vegetable or its subclasses. Even if class Fruit has the exact same interface as class Vegtable, you cannot assign an instance of class Fruit to item when you declare item as in the preceding example. To write more flexible code, you have to differentiate between class and type. In the preceding example, Vegetable is both a class and the type. However, there's a correspondence between a type and an interface and between a (concrete) class and an implementation.

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