By Marco Casario

This booklet is for any Flex developer who's pleased with the fundamentals and desires to take their wisdom to the following point. It presents a library of over a hundred options to universal difficulties. every one resolution takes you thru the workings of the instance step by step after which provides a few expert's information, so one can take your figuring out additional and provides you precise insights into Flex improvement. insurance comprises Flex 2 elements, charting, operating with distant info, facts validation, showing facts with record dependent controls, controlling the appear and feel of purposes, program safety, and dealing with dynamic information sources.

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Additional resources for Flex solutions : essential techniques for Flex 2 and 3 developers

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Com/2006/mxml" creationComplete="initStyle();"> 5. Save the file and run the application—your example should look like Figure 1-4. Figure 1-4. The StyleManager class enables the global selector to be applied to the application. qxd 10/31/07 1:19 PM Page 12 FLEX SOLUTIONS: ESSENTIAL TECHNIQUES FOR FLEX 2 AND 3 DEVELOPERS The result is the same as that obtained using the CSS global selector solution, as shown in Figure 1-4. All the texts defined in the application are forced to inherit the defined styles.

Mxml. 2. com/2006/mxml" creationComplete ="init()"> 3. text="The Button has been clicked"; } ]]> The init() function uses the addEventListener() method, which registers the clickHandler event handler on the Application of the myButton component. This component will be a Button control that you define in the application. The first parameter of the addEventListener() method is the event type, which is the type of event for which the object will be registered. The click event was inserted by sending it as a string.

In this case, you defined a new custom event and called it changeRegionEvt. This event is registered by the metadata [Bindable], which is declared on the getter functions chooseRegion() and changeRegion(): [Bindable(event="changeRegionEvt")] The metadata [Bindable] is required to communicate to Flex to propagate the change of the property to all the data binding that refers to it. Solution 1-4 explains the data binding feature. If the property value remains the same, Flex does not dispatch the event or update the property.

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