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Flex Component Class Hierarchy

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This article is all about presenting the visual component hierarchy this is basic thing in flex which shows how different properties, method and evens added to the component at various levels and this give knowledge to the lower level of abstraction.

Flex Visual component are created with the class hierarchy of several ActionScript class to provide more flexibility and add more features at the different level of hierarchy.

Following is a visual representation of class hierarchy of Flex Visual Components:

Flex Component Class HierarchyObject: Object is a Top/Root Level class of AactionScript class hierarchy. | More Info…

EventDispatcher: EventDispatcher class extends object class. EvenDispacher class allows any object on the display list to be an event target. | More Info

DisplayObject: Display Object class extends object and this is the base class for all objects which can be added in the DisplayList. Display object class allows some properties (x, y, width, height )for components/Objects like MovieClip, Button, TextField etc. | More Info

InteractiveObject: InteractiveObject extends DisplayObject and it is an abstract base class for all DisplayObject with which user can interact. InteractiveObject provides some common properties like doubleClickEnabled, focusRect, tabIndex etc… and Events like all mouse Events, Keyboard Events. | More Info

DisplayObjectContainer: DisplayObjectContainer extends InteractiveObject class and it is a base shell for all containers which adds display objects in the container shell. . DisplayObjectContainer provides some common properties like numChildren, tabChildren etc and methods like addChild(), removeChilld() method related to the child display object management. .. | More Info

FlexSprite: FlexSprite is a subclass of the Player’s Sprite class and the superclass of UIComponent. It overrides the toString() method to return a string indicating the location of the object within the hierarchy of DisplayObjects in the application. The Sprite class is a basic display list building block: a display list node that can display graphics and can also contain children. | More Info

UIComponent: UIComponent extends Sprite and it is a base class for all Interactive and non Interactive component. The UIComponent class is not used as an MXML tag, but is used as a base class for other classes. | More Info

All Visual Components like VBox, HBox, Canvas, Button etc. extends UIComponent.

Hope this article will help you. Any Comments?

One Response to “Flex Component Class Hierarchy”

  1. […] Do u know Adoeb Flex Component Life Cycle..? November 6, 2009 mukeshinpossibility Leave a comment Go to comments Each flex develooper must know the Adoeb Flex Component Life Cycle. It covers the basic s of component developement in Flex. Got some posts regarding that which covers that topic in detail. Though they are little boring but if curious to know about it then check out the following links1)by  msimtiyaz2) by simplyolaf3) by suketu […]

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