Developing flex 4 components pdf

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KINDLE PDF. Read Download Online Developing Flex 4 Components: Using Actionscript & Mxml To. Extend Flex And Air Applications (Developer's Library). Online Source Download and Free Ebook PDF Manual Reference. Developing-flexcomponents-using-actionscript-mxml-to-extend- flex. Developing Flex 4 Components: Using ActionScript & MXML to Extend Flex and Learning Flex 4: Getting Up to Speed with Rich Internet Application Design.

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Using Actionscript & Mxml To Extend Flex And Air Applications (Developer's Library) By Mike E. Jones pdf download. Developing Flex 4 Components: Using. Get Free Read & Download Files Developing Flex 4 Components Using Actionscript Mxml To Extend Flex An PDF. DEVELOPING FLEX 4 COMPONENTS . Developing Flex 4 Components Using Actionscript Mxml To Extend. Flex And Air PDF books which you could acquire as much knowledge as you would like.

The onClick method also accepts an event argument, which defaults to null so that it's optional—this allows it to be used as an event listener, as you'll see shortly. The process, as simple as it may look has influenced the component based development. Note that the regular expression uses similar syntax as Java does, in particular the double backslash when you actually want a single backslash. The dataDirectory , chapter , and fileName fields tell the component where to find the example. Flash Builder provides support for some basic refactoring. WindowedApplication xmlns:

This CMS Frameworks thrives on its community that feeds the component market and that eventually allow local developers to acquire components for their Web Applications, install them and use them without the need for further modification at a programming level, which eventually implies that a complete Web Application can be developed without the need of writing any line of code.

4 components pdf developing flex

The development of JAR components and their reuse in new development processes for new projects permitted the use of most of the aspects in Components Development characteristics. Nevertheless JAR based component development, which had to eventually reach its highest expression in the use of Beans components [4], did not went along with the needs of the developers communities, and eventually drove most of the developers to Object Oriented and API based development.

It's true that code modification cannot be taken away from Component based development, but it can be reduced and redistributed to different profiles in a team, allowing a more dynamic development process and in some cases even obviate the need for code modification [6].

Yet another reason for the unsuccessfulness of the Java Components based development is the lack of a well-established global community that may support the components market. Source Forge2 may be the center and most known source of programs and components for developers. In it, the highest number of elements is Java based, mainly because Java is an Open Source initiative that allows an easier transaction of programmed elements. Yet most of the components taken from the existing Source Forge data base are complex and hard to adapt to a specific need, and as a consequence they eventually end up being used as independent elements and in some cases called from within programs as an external program.

Being a CMS it had a much favorable way of showing to the developers community how an Open Source initiative can be taken care by a complete community, improved, maintained, and eventually used to make a profit out of it. The Joomla! Framework itself is a package of standardized components that were officially approved by the core team in charge of the project.

As a result the main components that form part of a Joomla! The fact that most of the components used in the development of Joomla! The latest version of Flex grasps the idea of Component development allowing an easy creation of components as well as its easy distribution and recycle, and at the same time it finds an equilibrium between the Object Oriented development and Component based development for distribution on a global scale.

It is of great importance that the tools that each technology offers may be easy and strait forward to use. In the case of Joomla! These components will later form part of web applications in which local developers are working. The process, as simple as it may look has influenced the component based development. The introduction of easy component creation decreased the development time for each component, increased the amount of components that are available in the market, and improved the maintenance of these components.

As the market is flooded with new components the role of the community starts to shift towards a more administrative work by judging the quality of each of these components. The work on an open source component's life cycle introduces the need for a collaborative initiative in which the community members participate.

A collaborative work over the internet through virtual communities can be met by new and ground breaking tools that have as an objective to reduce the obstacle of a lack in physical communication, and increase the efficiency in the work process by using as a platform the online communities.

The main obstacle that rises from all this is precisely the complexity of the work process and the lack of an established methodology that can be adapted to these new activities and cover the needs of a standardized work process. In the following sections we explain a solution to this problem by offering a proposal for a new organizational structure and finally achieve an evolved methodology that covers the Community and Component Based Software Development Methodology.

Making use of the theoretical and practical work that has been done by us over this topic for the last few months; we will obtain an optimized methodology that will enclose the activities and profiles that form part of the process. Forums, wikis, FAQ, and many other collaborative activities can take place in those systems [8]. The power that online communities offer is great, but the lack of an established working process for this type of organizational structure shows a great problem in the developing process.

CMS Framework proved us what can be done but also what should not be done.

Effortless Flex 4 Development

These problems are related to its structural system, and any community based open source project has the potential to end up in such a situation if a very dedicated and well elaborated working process is not followed strictly. Flex in the other hand has a potential to follow the proposed work process, as the tools themselves that Adobe offers to work with are design to cover the needs of a Component based development process.

If we consider that behind the scenes stands a large software company as may be Adobe, that offers a support to the Flex SDK, and that on this programming technology the virtual communities or even private entities elaborate Flex Components and release them to the public, the quality of the resulting components and any software application based on these components will be ensured. Flex is yet to prove to the developers communities its potential, there is still much work to be done as more support communities have to be created and even more important, the component sharing activity has to take a more center role.

A possible working process will have to cover the community support, the component sharing ideal, the collaborative development process, the global and local view of the projects, the maintenance and feedback of the development Framework, and the use of proper tools and standards to ensure a common communication language between all the members of the online community. From now on we will consider the existence of these working areas mainly because the development of Components and Community based applications are translated to a local development and implementation of the projects, and in the other level the distribution and feedback to the global community by supporting the global Framework project.

The first level is the Local components based methodology. Any project has to be addressed by a group of developers that are either physically present or share the same work space, or collaborate through collaborative tools on the internet. In both cases it has to be considered as a decentralized work process, as the work is taken forward by the local developer. The work process on the Local level will be strongly connected to the Global level. When a development process takes place on the local level, the developers are constantly in contact with the community and the global framework project, acquiring documentation, examples, and components that may optimize the overall development process.

Finally each local development team will form part as a member of the global development team, and as was stated before will constantly offer feedback to the community and thus improving the quality of the Framework project, and complying with the decentralization ideal.

The Local development methodologies are the ones that will take place in a software preparation and distribution as a final product. Any Framework developed to create software programs has as a main objective to offer the tools for the creation of new products and their eventual distribution. Many different developing entities, enterprises and other independent groups tend to choose a certain development methodology at the moment of starting a project analysis.

The lists of methodologies are well known and explained in the Software Engineering field. One of the great advantages of these methodologies is their easy adaptation to new possible working needs. When it comes to software development under the criteria that we are analyzing in this article, we could rapidly choose a component based methodology and try to adapt it to this case. However it's not as simple as it looks. The fact that we introduced the Local and Global levels require from us to establish a number of new profiles that may ensure the work at the local level as well as at the global level to be as optimal as possible.

During the Joomla! Master Class event, that took place in the month of February in the University of Alcala, the main speaker and one of Joomla! To this methodology we introduced a number of new profiles that are the results of our study on real practical situations.

These profiles are to be considered as an essential part of the proposed methodology being idealized in this paper. The profiles that will interact in a Local development team are: Will work at all levels, on the back and front end of the CMS. Works on the back and front end, with a special dedication to components analysis, design and component development.

Getting Started With Adobe Flash Builder 4

Works on the back and front end, with a special dedication to components development. His responsibilities will be especially in the front end, even though he will have some work on the back end in case of a component development.

Components pdf flex 4 developing

He will be in charge of templates development. Both Front and back end. Will be in charge of the maintenance, and updating the project content. It's a fundamental profile of this methodology. Will work together with the Content Manager. This profile will be in charge of executing validation tests and analyzing the accessibility of the project. As it can be seen above the key profiles are the Component Analyst, and the Content Manager. Nevertheless the rest of these profiles have also a great importance for the success of a Component and Collaborative based Software Development.

The activities offered in the SCRUM work process represent perfectly the spirit of the agile development methodologies. The profiles mentioned above will form working groups, with their respective SCRUM leaders, and will ensure the meetings processes inside the groups and outside of them.

The teams will generally be formed by similar profiles, the Content Managers in one group, the Component Analyst in another, and so on [10]. Making use of the agile nature of this methodology, a constant feedback between the groups will take place through the short meetings between the team leaders.

Flash Builder 4 supports integration with several server technologies, including ASP. Selecting one of these options allows Flash Builder to provide automatic configuration for remote calls. The specific data needed is dependent on the selected technology. The additional steps in the wizard allow for further customization of the project, but the default values are acceptable for most beginner projects. The Flex SDK provides a rich set of components useful for developing applications, including everything from Buttons and Labels to rich charting components.

(PDF Download) Developing Flex 4 Components: Using ActionScript & MXML to Extend Flex and AIR

Flex 4 projects will use a combination of these components. When a project is created or opened, Flash Builder displays the main window, called the workbench. The workbench consists of a set of Views, Editors, and Toolbars.

Views provide visual access to some part of your project. The initial views include the Package Explorer, Outline, Problems, and several others. Editors allow you to edit the source files, and can be text based or visual. Toolbars provide easy access to commonly used menu items.

Perspectives can be used to manage your workbench. A perspective is a collection of views and toolbars appropriate for a certain activity. Flash Builder provides two default perspectives, Flash and Flash Debug. You can modify these perspectives or define your own to customize the Flash Builder environment to your individual taste. Flash Builder 4 is built on Eclipse, and inherits many of its features and shortcuts.

Flex applications consist of two different types of source files. MXML files. ActionScript files. You can achieve the same functionality with either type of file, but they are tailored to different usages.

ActionScript files are ideal for non-visual code, including model or service classes. Adobe Flash Catalyst is a tool that allows designers to easily create Flex applications from artwork created from the Adobe Creative Suite.

Flash Builder provides tools to import Adobe Flash Catalyst projects. For more information on Catalyst: You can switch back and forth between these modes while editing an MXML source file. This makes it easy to manage the visual layout using the designer while switching to the source view to add ActionScript and non-visual components.

Source mode provides an XML editor with robust code completion, syntax highlighting, and error highlighting. The figure below shows the MXML editor in source mode with the code completion pop-up open.

Design mode provides a visual preview of your application. This is very useful for laying out the components, or simply checking to see how they will look without running the application.

The Design mode features a list of available components in the bottom left window. You can drag and drop these onto your application to add them and adjust the layout.

Components developing flex pdf 4

Each Flex container uses a specific layout to determine the size and position of the visual components. The Flex SDK provides four general-purpose layouts.

Components can be configured using absolute or relative positioning. BasicLayout allows absolution positioning, where components are assigned specific x and y coordinates. This mode allows pixel level control over the appearance of the application. However, it also has several drawbacks. When using BasicLayout, users cannot usefully resize the application.

It can also be very difficult to internationalize an application, as buttons and labels are often different sizes based on the language. VerticalLayout, HorizontalLayout, and TileLayout all provide different approaches to layout components using relative positioning. Flex also provides a layout specifically for button bars skins ButtonBarHorizontalLayout.

You can create your own Layouts by extending one of these layouts, or their base class, LayoutBase. When you move beyond simple components and need to begin to create object models and complex logic, it is time to use the ActionScript editor.

The ActionScript editor is a traditional source code text editor. The editor includes keyword highlighting, error highlighting, and provides a list of current problems Errors and Warning in the view at the bottom of the workspace. The following figure shows a simple ActionScript class with two unresolved problems.

Flash Builder provides code completion for many common scenarios. Code completion can be triggered automatically based on context or manually, using Ctrl-Space. Code completion is automatically triggered after a period or colon, displaying either possible variable and property names, or available types. ActionScript is a dynamic language. Therefore, the code completion can only provide guidance for the statically known functions and properties.

There will be occasions when code completion will be unable to identify valid functions or properties. ActionScript is a relatively concise language, avoiding significant amounts of boilerplate code.

However, there are still occasions where it is useful to have Flash Builder perform common code generation. Generate Service Call generates code to integrated with server classes when using Data Services. The following table provides a list of where and how these code generation functions can be invoked.

Flash Builder provides support for some basic refactoring. You can Rename variables and functions, and Rename or Move classes using the menu: These menu items will open a dialog box allowing you to specify the new name or location. Flash Builder supports integration with many different source control management tools. You can install an Eclipse Plug-in for the source control management tool you use.

The Flash Builder Data Centric Development feature allows developers to quickly and easily connect Flex applications to a backend service. To use the Data Centric Development feature, the project must be connected to a service. This can either be done when the project is created, or later when needed. If a service was not defined, Flash Builder will prompt to create one when the Generate Service Call code generation feature is first used.

Select the type of service you are using. You will then be taken to the Project Properties page where you can setup your service this the same options and inputs used by the New Project Wizard. Flash Builder performs a background compilation every time a file is saved. This provides real time feedback to compile errors while also encouraging users to save regularly. You can then opt to rebuild one or more of the projects in your workspace.

Web projects are packaged into. You can find the template in the html-template directory. This enables easy deployment of an application, or can serve as a guide for a custom HTML page. Desktop projects are packaged into an. Each Adobe AIR application must be signed using a digital certificate. You can purchase a certificate from a Root Certificate Authority, or generate your own self-signed certificate. If you generate your own certificate, users will receive a warning when they install the application.

Therefore, it is important to use a valid certificate from a Root Certificate Authority when distributing applications to a broad user base.

Creating Flex components | Adobe Developer Connection

You can also generate an intermediate file. This is an unsigned. This is useful in situations where the person who builds the project is different from the person who is authorized to use the certificate. Flash Builder provides the ability to launch and debug your application from within Flash Builder.

Applications can be launched as a separate process Run , or Flash Builder can attach to the running application Debug. Flash Builder is configured by default to use your primary mxml file as the entry point. For web applications this will launch your application in a browser using the html-template.

Desktop applications will be run using Adobe's runtime engine.