Developing Flex 4 Components: Using ActionScript & MXML to by Mike Jones

By Mike Jones

The 1st e-book to totally demystify modern part improvement with the Adobe Flex three platform - the best way to construct parts for Flex and AIR purposes utilizing ActionScript 3.0 and Adobe's strong MXML person interface markup language - Covers specialist strategies such a lot books forget about, together with part metadata, errors dealing with, documentation, and developing Flex parts in Flash utilizing the Flex part package - by means of Mike Jones, world-renowned Flex improvement advisor and speaker precis Adobe Flex three bargains a strong new framework that internet builders can use to speedy produce richer, extra immersive, higher-value ideas. to aid builders construct the main robust next-generation internet purposes, Adobe established the Flex framework round parts, and allowed builders to expand Flex's features with their very own parts. besides the fact that, few Flex builders know the way to create those customized parts. constructing Flex parts is the 1st ebook to fully demystify that approach. popular Flex developer and speaker Mike Jones starts off via providing a brief evaluation of Flex and Flex Builder aimed toward ActionScript 3.0 Flash builders. Jones explains the anatomy of a Flex part, together with either visible and non-visual elements, and introduces the elements that include the Flex framework. subsequent, one step at a time, he walks via construction new Flex parts that leverage the platform's strong services and will be integrated into either Flex and AIR purposes. Jones covers subject matters which are hardly addressed in Flex books, together with part metadata, occasions and mistakes dealing with, info binding, skinning, styling, and growing Flex elements in Flash utilizing the Flex part package. He additionally provides an entire bankruptcy on writing and retaining part documentation, in addition to an appendix of extra assets for Flex part builders.

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If you want more information on naming standards within ActionScript and Flex,Adobe provides a coding standards document that you can read at your leisure; see Appendix A for the URL. With this information in mind, give your project the name DFC_DevelopingComponents. 8 and the following ones will become second nature to you. 8 Initial Create a Flex Project screen Click Next to proceed to the next step in the process. On the next screen, we have the default output folder into which our Flex-compiled files are placed.

Suffice it to say that a lot of stuff is going on under the hood of the new layout components and, once you are familiar with them, it’s unlikely that you’ll go back to the older Halo versions. After all, why pay the file-size hit for scrollbars if your application doesn’t use them? Within Halo, you don’t have a choice; you can only turn them off, but they’re still there in the code base.

These components can accept a vast selection of data formats to use as a data provider. However, the most commonly used are arrays and collections. Where they differ is how you access and interact with the data; arrays, as you are probably aware, use a zero-based index, whereas collections deal with items. ” These pairs are constructed of a label and a data property. They can accept complex data and display it for you. If you have multiple fields within a data object that you want to display, you can employ ItemRenderer.

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