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Creating a custom formatter

You create a custom formatter by creating a class that extends the mx.formatters.Formatter base class, or by creating a class that extends one of the standard formatter classes, which all extend mx.formatters.Formatter. The following example shows the class hierarchy for formatters:

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About data representation, Data binding, Data models, Data validation, Data formatting

Adobe® Flex® provides the following set of features for representing data in your applications: data binding, validation, and formatting. These features work in conjunction with the Adobe® LiveCycle™ Data Services ES and Vega features for working with remote data. Together, they allow you to perform the following tasks:

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Associating a Skin with a Component

Flex’s Button component was the first to be implemented in the new Spark architecture, and is a good example of component and skin separation. The skin definition first references the component to which this skin can be applied. This optional metadata element allows the skin to hold a reference to the component class, if necessary. Next, the various component states are referenced, followed by visual definitions of the component:

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Understanding the Flex 4 Spark Component Architecture and how to Build Custom Components with the Flex 4

The architecture of the new Spark components in Flex 4 supercedes the Halo components of Flex 3. Upon learning how to leverage the architecture of Spark components, you will find the improvements to be quite substantial.

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ObjectCollector: Accessing Flex’s objects by id (even dynamic generated) from anywhere

Flex’s components have a nice id property which can be used to easily referencing object created.
All you know, that if I get the following mxml Application file:

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