Question : Which one of the following best defines attributes as used in AutoCAD and defined by the command DDATTDEF.         Answers: (a) Text entities that can link to a database. (b) Special text entities... Read More

No. Basically, what we are about to do is creating XMLHttpRequest with Javascript in Flex, and calling a server data with the parameters we will give to the object. e.g. xmlHttpRequest.open("GET","http://localhost/Default.aspx",false); 1. Request... Read More

File is already there , we need to register our ip address to flicker?s crossdomain.xml Since the images are located on a flickr server like farm1.static.flickr.com and there is no crossdomain.xml file on that server (there is a crossdomain.xml... Read More

The services-config.xml configuration file is required at compile time if the Flex application uses Flex Data Services. In the case of RPC services, this applies to all applications that use RemoteObject or proxy-based WebService or HTTPService. Read More

Math.round(Math.random() * (high - low)) + low Read More

CountryComboBox.as package components { import mx.controls.ComboBox; public class CountryComboBox extends ComboBox { public function CountryComboBox() { dataProvider = [ "United States", " United Kingdom" ]; } } } <? xml version="1... Read More

Using BlazeDS Server, LiveCycle Data Services Read More

To let Flex resize the image as part of laying out your application, set the height or width properties to a percentage value. Flex attempts to resize components with percentage values for these properties to the specified percentage of their... Read More

The ResourceManager ? now handles access to all localized resources in an application. Any components that extend UIComponent, Formatter, or Validator now have a new resourceManager property, which lets you easily access the singleton instance of... Read More

Both can be used as client application, both have packages, OOP based , support XML , import external packages, up casting, support ArrayCollection ,almost same primitive data types, both support class library packaging( . jar , .swc). Read More

Specifies that instances of a class may possess dynamic properties added at runtime. If you use the dynamic attribute on a class, you can add properties to instances of that class at runtime. Classes that are not marked as dynamic are considered... Read More

Using Blaze DS Server & LCDS Read More

Yes . import flash.filesystem.*; private var stream:FileStream; private function saveFile():void{ var file:File = File.desktopDirectory.resolvePath("HelloWorld.txt"); var stream:FileStream = new FileStream() stream.open(file, FileMode.WRITE); ... Read More

The Flex Drag and Drop Manager lets you select an object, such as an item in a List control, or a Flex control, such as an Image control, and then drag it over another component to add it to that component. Read More

Using the ExternalInterface API to access JavaScript from Flex and Using the navigateToURL() method in Flex. The navigateToURL() method is in the flash.net package flash.external.ExternalInterface.call(function_name:String[, arg1, ...]):Object; ... Read More

<mx:Application> <mx:Script> <![CDATA[ [Bindable] public var myArray:Array=[1,2,3,4]; ]]> </mx:Script> <mx:Panel title="Repeater: emulating a for loop" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop... Read More

Skinning is the process of changing the appearance of a component by modifying or replacing its visual elements. These elements can be made up of images, SWF files, or class files that contain drawing API methods. There are several ways that you can... Read More

External styles are defined in a separate file and can be used in any MXML file that references the CSS file. You reference a CSS file into an MXML file with the source property of the <mx:Style> tag, as follows: <mx:Style source="..... Read More

Classes are sealed by default, i.e. properties cannot be added dynamically at runtime. * Dynamic classes can add additional dynamic properties at runtime; sealed classes cannot. * Sealed classes conserve memory because no internal hash table is... Read More

All components dispatch the following events that let you specify ActionScript to initialize a component: preInitialize Dispatched when a component has been created in a rough state, and no children have been created. initialize Dispatched when a... Read More

(Separation of concerns) The goal of the Model-View-Controller (MVC) architecture is that by creating components with a well-defined and limited scope in your application, you increase the reusability of the components and improve the maintainability... Read More

The State class defines a view state, a particular view of a component. For example, a product thumbnail could have two view states; a base view state with minimal information, and a rich view state with additional information. The overrides ... Read More

Each list control has a default mechanism for controlling the display of data, or view, and lets you override that default. To override the default view, you create a custom item renderer. Note: With reusable inline item renderers you use data... Read More

Private keyword , this keyworld (? ) in flex Read More

class UnpaidIntern extends Employee { override public function receivePayment():Number { return 0; } } class Manager extends Employee { override public function receivePayment():Number { return baseSalary*3; } } class Engineer extends... Read More

Method overloading using namespaces. (?) Read More

Dynamic classes, which allow you to programmatically add new properties and behavior to classes during the run-time. Just add the magic keyword dynamic to the class definition: dynamic class Person { var name:String; } Now let?s add dynamically... Read More

A sealed class possesses only the fixed set of properties and methods that were defined at compile-time; additional properties and methods cannot be added. This makes stricter compile-time checking possible, resulting in more robust programs. Read More

Cairngorm is the lightweight micro-architecture for Rich Internet Applications built in Flex or AIR. A collaboration of recognized design patterns, Cairngorm exemplifies and encourages best-practices for RIA development advocated by Adobe... Read More

Flex does not support abstart class directly. Read More

1. Creational Pattern * Factory Method Pattern * Singleton Pattern 2. Structural Patterns * Decorator Pattern * Adapter Pattern * Coposite Pattern 3. Behavioral Patterns * Command Pattern * Observer Pattern * Template Metod Pattern *... Read More

Binding in MXML Lets look at the following code? <mx:TextInput id=?ti1?/> <mx:Label id=?label1? text=?{ti1.text}?/> Here you are binding the text property of the TextInput to the label. So whatever you type in the textInput... Read More

ChangeWatcher: Acts like the watch on AS2. It watches a variable for changes and when something happens fires an event. Make sure you call the canWatch to ensure that you can watch it! There are 3 ways to specify the second parameter, the chain. ... Read More

So we can reattach the watcher again & We can change the source object (of changewatcher) by reset method. The ChangeWatcher class defines utility methods that you can use with bindable Flex properties. These methods let you define an event... Read More

* addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void * removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void * dispatchEvent(event... Read More

Cancels an event's default behavior if that behavior can be canceled.. For example, the doubleClick event has an associated default behavior that highlights the word under the mouse pointer at the time of the event. Your event listener can... Read More

Calling the setStyle() method can result in decreased performance. Use it only when necessary. You should try to apply style sheets rather than use the setStyle() method because it is computationally expensive. This method should only be used when... Read More

To create a behavior, you define a specific effect with a unique ID and bind it to the trigger. For example, the following code creates two zoom effects: one for shrinking the component slightly, and one for reverting it to its original size. These... Read More

If currentIndex value is greater than startIndex value means a component is created in Repeater. We can use count property to find number of children. A Repeater component executes initially when it is instantiated. If the Repeater component's... Read More

Flex 1.5 does not support this. First declare the tags in MXML and then manipulate the URLs, request objects, and so forth using ActionScript. Read More

Dynamic loading of CSS files is not supported in Flex. CSS in Flex is processed on the server side during MXML compilation rather than on the client side at runtime. There is a trick though: A CSS file can be compiled into a separate SWF file and... Read More

You can often achieve the "display=none" effect by setting the height/width to zero when you set it invisible, and then set it back to a fixed value or to undefined when you make it visible again. Read More

Flash Player deserializes objects in a special order that can confuse developers used to object serialization from other RPC systems. When a strongly typed object is returned to the player, it first creates an instance from the prototype of the... Read More

The NetConnection Debugger is an old utility from the early days of Flash Remoting that some developers still find useful. It has an issue, however, displaying types that have been registered with Object.registerClass(). If your Flex server is... Read More

The AMF Gateway provides access to the current HttpServletRequest instance in a thread local variable. The session can be obtained from the request, as follows: flashgateway.Gateway.getHttpRequest().getSession(); Read More

There are a few differences between defining data bindings in MXML at compile time and in defining them at runtime in ActionScript: * You cannot include ActionScript code in a data binding expression defined by the bindProperty() or bindSetter()... Read More

See the LocalConnection API in the flex documentation. Read More

Unfortunately, double-clicking is not supported by default. If you wish to add this functionality to, say, a List or DataGrid component, you will have to add the following ActionScript 2.0 code to your application: var someTimestamp:Number; public... Read More

WebLogic ships with its own version of the fop. jar, which in turn includes the batik.jar, which is older and breaks Flex. To resolve this issue, remove the fop.jar from the CLASSPATH in the startWebLogic.cmd file. This may apply to non-WebLogic... Read More

This is a focus issue with Flash Player; usually when the UI changes "underneath" the mouse pointer, as in a ViewStack navigation where the buttons are in the same screen location. Read More

Make sure you use the TreeDataProvider methods to modify a node. Do not rely on the node being XML. For example, the above should be myTreeNode.getProperty("label") instead. Read More

Low-level methods like Array.push() or myArray[0] = "whatever" do not cause the dataProvider's modelChanged event to fire. When you work with a dataProvider, it is always best to use the dataProvider API. In the above example, you might code:... Read More

Select a node in your myTree. In ActionScript, you can reference this node by using the following code: myTree.selectedNode; To access the attributes of the node, use the tree DataProvider API. These methods will work for any format dataProvider... Read More

Three different ways to pass data into a title window. It uses the initobj to pass in several built-in properties plus two user defined properties. One is a simple string, the other is a reference to the main application that can be used for... Read More

Flex is not a server that you deploy and run. It is simply deployed as part of your web application. So it will work, no matter which web container you are using: Tomcat, JRun 4, WebLogic, and so forth. To learn how to deploy Tomcat, JRun 4, or any... Read More

Flex does not have any native database integration functionality. You must have your own server-side tier that provides the database-access tier and sends the data back to Flex through one of the following protocols: ? RemoteObjects: This is the... Read More

You are probably trying to read the result immediately after the send(), right? You're expecting synchronous behavior? Read More

You cannot make synchronous calls. You must use the result event. No, you can't use a loop, setInterval, or even doLater. This paradigm is quite aggravating at first. Take a deep breath, surrender to the inevitable, resistance is futile. There... Read More

Use getURL() to communicate with JavaScript in the HTML wrapper: getURL('javascript:window.resizeTo(1050,900)'); Read More

This is a known issue that is caused by the inability of Flex to differentiate between an object and an array with a single row. The solution is to always use toArray(), as in the following examples: In MXML: {mx.utils.ArrayUtil.toArray... Read More

The order is typically the reverse of the order in which they were added. If you need a specific order, specify that and many other good things by using DataGridColumn tags. Read More

Flex supports a limited subset of HTML in its TextArea and some other text-related classes. Read More