ActionScript 3.0 :: RIA For Handling Objects Across Components?
Feb 10, 2010
I'm used to building web apps using proper architectures, but relatively new to the RIA space.One of the issues in rich client app is approaches to handling communication across components. (I've played around using the EventBroker concept.)In a recent Flex3/AS app I was looking at they took an approach that seemed to work pretty well, but I wonder about the drawbacks (or any other pros)...They took the concept of having a singleton object that would hold objects that could be used obviously from any components within the app by a simple call to...
var myAppModel:AppModel = AppModel.getInstance();
You thus could put any objects in there that you wanted access to from different components. It seemed to serve as the equivalent of a "Session" in the JEE space. I'm not so sure from an OO perspective it's the best thing to do, but it did seem to work pretty well.
I'm building an application, where objects are attached on a canvas and the tree of that canvas is held on a tree component. Each time that i attach an object the tree adds a new child etc. I want to do this on the other way around.. I want to press a tree node and "communicate" with the specific object, so that i can change its color, delete it etc. I've tried some things but nothing happens!This is my code:
var working_space:XML = new XML(); working_space.addTreeNode("Canvas",0); myTree.dataProvider = working_space;
I have been trying to fix my collision handling for hours now, but it seems like I am running in circles. To be blunt, my collision handling sucks. It is easy to break, and hardly works on complex objects(like water in my case, see the test at megaswf . com / serve / 1577272)
For collision detection I am using the collision detection kit, or CDK.My level is made up of different large MCs, such as a "wall" MC containing all of the smaller walls, such as water, a tree, or a wall. CDK allows me to hittest the single walls by hittesting the large one, and not each one individually, making it easier for myself.My code has a lot of repetition(8 directional movement), so I will put a "//..." to simplify.
Main.as:
ActionScript Code: public class Main extends MovieClip[code]......
I have literally been working on this all day, and only feel like I'm making it worse every time I change something. You don't have to spoon-feed me code, the idea should be enough...
I need to make a function that creates an object based on each set of data in an XML file. I am currently using bracket notation to do it, but don't know how to increment the next object's name dynamically. I wanted to do something like this:
I've posted my question on other forum but without success so I couraged myself to ask here too. I've got an application (see image) which consists mainly from two different components. It is media player similar to winamp or so. Two main components are MainPanel and second one Playlist. These contain several other components so MainPanel constains Buttons objects TimeCounter or TrackDescriptionWidnow etc. and Playlist contains AlbumNext AlbumPrev buttons, Display which holds Textfields with names of tracks. So the thing which is most complicated is actually communicatig between some objects. Let's say I click on the track in the Playlist. In fact many objects need data when other one changes its state. When I click NextTrackButton in MainPanel, next songName displayed in the Playlist needs to shine, or if the ShuffleButton is pressed one of the random song will be played. My question is how to communicate between objects that are not in the propagation scope when events occur For example if some object fire an event in the playlist(Component2) only objects that come from Stage through Engine can listen for that event. So objects in MainPanel can not hear dispatched event. I've got many events, many objects listening for some of them, and I ended up with the total mess who is listening for. I register events to my class by public static const EVENT_NAME; and then dispatch it on that occured situtation. I managed to add some events listener to Engine and set bubbling to true, this way Engine can listen for most of the events, but then I have to dispatc new event to the other component to make it listening. Do you know how to communicate properly between differently scoped objects?
Here is what I'm trying to do. I have some TextArea objects inside a HGroup, created in the mxml part. I want them to have an id of an element of a bidimensional Array, a matrix. I'm having problems declaring the TextArea objects as Array components. I've tried a lot of formats and google it, but I found nothing relevant.
I'm writing a Flex application using Flash Builder 4 and I'm having a bit of trouble with an AS3 object.Essentially, it is a BorderContainer, with a few buttons and images, and programming logic that determines how these interact with eachother and a database.
What I want to be able to do is configure the layout/style of the inner components using MXML and CSS. I can configure the inherited objects, but not ones that I have defined.[code]...
I am pretty new to flex, specially to mxml part. There are some confusing things for me.[code]...
So question is how do I access that button's properties. I want when something happens in Xyz file, button's (someId) visibility to become false. If Abc.mxml was AS class file then it would be easy, just make object etc., but how to get if it's mxml file.
I am created a dynamically adding a VBox, that contains two images. Into a Custom Component that is derived from UIComponent. The problem is the Vbox that contains the two image is only a really tiny size. I would like the VBox stretch to the size of the two images. This is how I am creating the Vbox....
Is it bad practice/design to nest components inside components using Flex 4? Should I simply be creating components and inserting them into my main application as below, or doesn't it matter?
how i can use actionscript component code in mmxl components,as in actionscript components we use classes ,but in mmxl component we can not use classes function, so how i can use actionscript component code in mmxl component
[Code]...
but i cant use this code in mmxl components how i can use public class DialogTitle extends HBox implements IBindingClient in mmxl component code,what are the way to use it,sorry i am newbie if it is silly question
I am trying to get metadate from my NetStream object and do things depending on what is going on. here is what I have, but I get an error I don't know what it means.
var customClient:Object = new Object(); customClient.onMetaData = metaDataHandler; function metaDataHandler(infoObject:Object):void {
[code]....
The error I get is:Error #2044: Unhandled AsyncErrorEvent:.text=Error #2095: flash.net.NetStream was unable to invoke callback onMetaData. error=TypeError: Error #1010: A term is undefined and has no properties. at AMG_ASP_ICS_072709_fla::MainTimeline/frame1()
How do you communicate an error to the web service consumer ?
For example, my web service has a function to insert employee into db.Suppose while inserting the data , the database gave an error,what should be the best way to inform the user about the error.
One way is to depict it through the return value of the web service method but what to do when the function is supposed to return a complex object like employee when there is no error ,and will send an error string when there is an error ?
I have a bit of code listens for a user to click a navigation item, however if they click another nav item then my code loads both of them and puts the content pages on top of each other.I am having loads of problems with this bit of code.
PHP Code: private function _menuSelectHandler (event : MenuEvent):void { if (! event.abstract) {
I have a problem with event handling. I'm working on a calendar, on which events can be listed. With actionscript i loop through an XML file with the days (and if there, the events for that day). So far so good. Where it goes wrong is this: I only want to display blocks with the day numbers on it. When you click on a day, a box pops up and shows the event's for that day.
This is what i did: created a movieclip with classname mc. loop trough the xml file and for each day create a new instance of mc with the day number as text on it. This al works, but now i want to add an eventhandler for each day. How to do this?
I'm asking many questions these days but its really urgent
I am doing an application to load xml file into data grid and everything is done now. The only thing left is that i wanna make sure that if the xml file isn't there, the user will not have a runtime error.I have the following code to load the file.
var myXML:XML = new XML();var XML_URL:String = "questions.xml"; var myXMLURL:URLRequest = new URLRequest(XML_URL);var myLoader:URLLoader = new URLLoader(myXMLURL); myLoader.addEventListener("complete", xmlLoaded);
i tried many ways i found on the net using try and catch but didnt work. Anyone can write me the peice of code to hande this error if the file is not there??
If I have a graphic that is fully transparent in places, can I make only the non-transparent portions of the graphic respond to mouse clicks? I realize I can probably do this with a few lines of code, e.g. detect the click and then check the alpha value under the mouse. But I was looking for something simple. For example, in Director there is an "alphaThreshold" in a graphic that determines at what alpha value a bitmap will respond to mouse clicks. Does Flash / AS3 have a similar capability?
I'm working on a game, that loads up external text files to create maps. There is a error if the player moves out of bounds, and there is no map to load. All I need is a sort of check to see if the text file actually exists, before loading it
I'd like to arrange things so that I have a chain of keyboard event handlers in my flex application, all of whom are queried when key down events occur. Basically, when a visual component is on screen, it is a candidate for handling a key press event. Something like this (clearly this is pseudocode):
I have a class written that will respond to the key events the way I want it to, so how do I register one or more instances of this class to have the results I want? Also, note that there are some situations where this class should receive events that would ordinarily be handled by a UI component. The TAB key is the main example; I have a few cases where I want my key down event handler to fire even when the focus is on a text field.
We have a Flex client and a server that is using the Spring/Blazeds project. After the user logs in and is authenticated, the spring security layer sends a redirect to a new URL which is where our main application is located. However, within the flex client, I'm currently using HTTPService for the initial request and I get the redirected page sent back to me in its entirety. How can I just get the URL so that I can use navigatetourl to get where the app to go where it needs to?
I am building a Flex application using Pure MVC pattern and Zend framework for calling php code on the server. I need to sync some data with my server which is using MySQL as the database. And there are 5 such tables I need to sync. So I call these php functions at regular intervals from Flex and use long polling on php side. The client side code for my subjects lies in 5 different proxies.
Should I send 5 separate requests from each proxy to call the php code which is lying in separate classes. Or should I build a separate proxy to send 1 request from 1 php file and then distribute this data among different proxies on the client side. Which one will be more effecient? Mathematics shows using separate proxies and php classes allow more number of users to be accomodated on the server.Can I write 1 SQL command to fetch data from all 5 tables given they cant be joined on any column?
I have a very simple Flash movie with multiple keyframes. Each keyframe has buttons which I'll be attaching event listeners.
I was hoping that I could add all event listeners to all buttons in all keyframes by using a document class. This works for buttons in frame #1, but anything else gets a null reference exception:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
I also tried adding a layer to the timeline that spans all keyframes and putting in the eventlisteners (and respective addEventListeners) there. Same thing - null reference exceptions for everything not in frame #1.
Have been dabbling with flash for few years, but would like to send data to external PHP file and would like flash to process response.The way I have it working is to register function for the submit button on the main stage where I have the form instance. However, when I do this, it stops rollover effects from working on submit button. (The button is actually a movie clip instead of straight forward button btw.)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~ Form code below: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~
on clicking the Search Icon , a search bar will be visible (ON) if user click anywhere on the stage the search bar will be NO visible(OFF) OR user click on ICON again the search bar will be OFF but it Stage CLICK is triggered without clicking
Code: searchIcon.addEventListener(MouseEvent.CLICK, showSearch); var srchBox:Boolean = true; function showSearch(event:MouseEvent):void
I am trying to create an app that will read files form a local folder on a memory stick (flash drive) which the app will be on too, then I need to be able to move one of the files in this local directory to a specified folder on the system BUT there has to be a variable taken from a text input to complete something along the lines of
I have a class with a XML object in it. In one of the class' methods, I tell the XML object to load a document. Before I do that, I set up the onLoad event to call one of the class' other methods. The problem is that in that handler function, I can't seem to access any of my class' data. If I try to use the "this" pointer, I'm getting the XML object not my class.
