MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador descarregar pdf (Página 54)

54 Building a Flex Application

For example, the following figure shows two different Box containers that each contain three

Button controls and a ComboBox control:

This figure shows the controls within a horizontal Box (HBox) container. An HBox container

arranges its controls horizontally across the Flash Player drawing surface. The figure also

shows the controls in a vertical Box (VBox) container. A VBox container arranges its controls

vertically.

Containers and controls define the application’s user interface. In an MVC design pattern,

those pieces of the application model represent the view. The model is represented by the data

model. Flex data models let you separate your application’s data and business logic from the

user interface.

You define your data models using MXML or ActionScript as part of a Flex application. The

following figure shows a form created in Flex that uses a data model:

Data binding is the process of tying the data in one object to another object. The data model

supports bidirectional data binding for writing data from Flex controls to the data model, or

for reading data into controls from the model. You can also bind server data to a data model

or directly to Flex controls. For example, you can bind the results returned from a web service

to the data model, and then have that data propagate to your form controls.

Box container with horizontal layout

Box container with vertical layout

Data model

HTTP/SOAP/AMF

Server

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador Página 54