I have a simple video/chat application built in FLEX. I've created a groupSpecifier, netGroup and a NetStream for the different functionalities.
NetGroup is mainly used for the messaging (Posting) and keeping track of the users who enter.
NetStream is (or would be used) to control some functions like "start video, stop video" for everyone under the same group.
The most important functions I will post on here. The first is setupGroup.
private function setupGroup():void{
var groupspec:GroupSpecifier = new GroupSpecifier("vid"+GROUP_ID+"_sid_"+SESSION_ID);
groupspec.serverChannelEnabled = true;
groupspec.postingEnabled = true;
groupspec.multicastEnabled = true;
groupspec.ipMulticastMemberUpdatesEnabled = true;
trace("Groupspec: "+groupspec.groupspecWithoutAuthorizations());
netGroup = new NetGroup(nc,groupspec.groupspecWithoutAuthorizations());
netGroup.addEventListener(NetStatusEvent.NET_STATUS,netStatus);
netVideo = new NetStream(nc,groupspec.groupspecWithoutAuthorizations());
netVideo.addEventListener(NetStatusEvent.NET_STATUS,netStatus);
user = "user"+Math.round(Math.random()*10000);
}
The second is sendMessage
private function sendMessage():void{
var message:Object = new Object();
message.sender = netGroup.convertPeerIDToGroupAddress(nc.nearID);
message.user = txtUser.text;
message.text = txtMessage.text;
netGroup.post(message);
receiveMessage(message);
txtMessage.text = "";
}
And then startVideo
private function startVideo():void{
netVideo.send("publishVideo");
ns.togglePause();
}
There is another function called "publishVideo" which I hope would be called for the rest of the members in the group, but this is not happening. Most of this code is straight from the example Tom has provided from http://www.flashrealtime.com. Any help / suggestions would be appreciated!
p.s. I am not using group object replication because of the latency.
Answer is prosaically simple.
You need to start video with:
netVideo.publish("channel");
NetStream.send() is for invoking callback method on receiver NetStream.client object.
http://www.flashrealtime.com/multicast-explained-flash-101-p2p/
Related
Hey folks, i ve got this issue implementing the Factory method.
Following is the snippet of the the main chart class which calls ChartFactory's method to attain the proper object. I Type Cast chartobject so as to be able to call the Show method;i m apprehensive about that as well.
container = new VBox();
container.percentWidth = 100;
container.percentHeight = 100;
super.media.addChild(container);
chartObject = new ChartBase();
chartObject = ChartFactory.CreateChartObject(chartType);
IChart(chartObject).Show(o);
container.addChild(chartObject);
legend = new Legend();
legend.dataProvider = IChart(chartObject);
container.addChild(legend);
Following is the snippet of ChartFactory's method:
public static function CreateChartObject(subType:String):ChartBase
{
switch(subType)
{
case ChartFactory.AREA_CHART:
return new AreaCharts();
break;
case ChartFactory.COLUMN_CHART:
return new ColumnCharts();
break;
case ChartFactory.PIE_CHART:
return new PieCharts();
break;
default:
throw new ArgumentError(subType + ": Chart type is not recognized.");
}
}
And following is Show method of one of the several Charts type classes: AreaCharts, PieCharts etc. All of which implements IChart Interface.
public function Show(o:ObjectProxy):void
{
var grids:GridLines;
var stroke:SolidColorStroke;
var horizontalAxis:CategoryAxis;
var verticalAxis:LinearAxis;
var horizontalAxisRenderer:AxisRenderer;
var verticalAxisRenderer:AxisRenderer;
grids = new GridLines();
if(WidgetStylesheet.instance.LineChart_ShowGrid)
grids.setStyle("gridDirection", "both");
else
grids.setStyle("gridDirection", "");
stroke = new SolidColorStroke(WidgetStylesheet.instance.LineChart_GridLineColor, WidgetStylesheet.instance.LineChart_GridLineThickness);
grids.setStyle("horizontalStroke", stroke);
grids.setStyle("verticalStroke", stroke);
horizontalAxis = new CategoryAxis();
horizontalAxis.categoryField = o.LargeUrl.Chart.xField;
horizontalAxis.title = o.LargeUrl.Chart.xAxisTitle.toString();
verticalAxis = new LinearAxis();
verticalAxis.title = o.LargeUrl.Chart.yAxisTitle.toString();
horizontalAxisRenderer = new AxisRenderer();
horizontalAxisRenderer.axis = horizontalAxis;
horizontalAxisRenderer.setStyle("tickLength", 0);
horizontalAxisRenderer.setStyle("showLine", false);
horizontalAxisRenderer.setStyle("showLabels", true);
horizontalAxisRenderer.setStyle("fontSize", WidgetStylesheet.instance.ComputeChartAxisFontSize(o.HeadlineFontSize));
verticalAxisRenderer = new AxisRenderer();
verticalAxisRenderer.axis = verticalAxis;
verticalAxisRenderer.setStyle("tickLength", 0);
verticalAxisRenderer.setStyle("showLine", false);
verticalAxisRenderer.setStyle("fontSize", WidgetStylesheet.instance.ComputeChartAxisFontSize(o.HeadlineFontSize));
this.series = this.m_createSeries(o);
this.horizontalAxis = horizontalAxis;
this.horizontalAxisRenderers = [horizontalAxisRenderer];
this.verticalAxis = verticalAxis;
this.verticalAxisRenderers = [verticalAxisRenderer];
this.backgroundElements = [grids];
}
I'm afraid that there is more than one issue with this code. Unfortunately it is not obvious why your chart doesn't show up so you may apply some of advices below and use debugger to analyse the issue.
There is no point in creating ChartBase instance if you are going to change value of chartObject reference in the next line
chartObject = new ChartBase();
chartObject = ChartFactory.CreateChartObject(chartType);
If the API of your charts is IChart your factory should return IChart instead of casting.
public static function CreateChartObject(subType:String):IChart
Make sure that you are returning instances of the correct class from the factory. i.e. that you are returning your subclass of standard PieChart. Generally it's not the best idea to extend the class keeping the same name and just changing the package.
Once again, if you are not sure if the program enters some function use the Flash Builder debugger to check this. I can't imagine development without debugger.
Some thoughts:
you call the Show method, pass it some object but nowhere in that method is any child added to a displayObject. What exactly is Show supposed to do?
a lot of member variables in your classes start with UpperCase. The compiler can easily confuse those with class names, in case your classes are named the same. Bad practice to start variable and function names with capitals.
If your casting an instance to another class or interface fails, you will get a runtime error. Those are easy to debug using the Flash Builder debugger.
Hey ppl..
i found out wat wnt wrng..as olwys it wa "I".
I ve a habit of mkin mock ups secluded from the main project n dn integrate it. So in mock up i hd used an xml whch hd a format slightly diff dn d one being used in the main project.
N i hd a conditional chk to return from the prog if certain value doesnt match, n due to faulty xml i did'nt.
So this more a lexical error than a logical one.
Sorry n Thanx evryone for responding.
I am working on a Flash training video. I would like at the end of the video for a message to pop up with a dynamic confirmation code. I have the code for the confirmation code, but am having trouble creating something either at the end of the flash video or within the aspx page to trigger this message. Any thoughts or ideas of how to solve this would be greatly appreciated.
Thank You.
Depend on the purpose of the application, you can do either one. One thing to consider is does the user has to go through the flash video to obtain the code. If so, you need to organize the flow of the application in a way that the user can't cheat their way to obtain the code.
The ideal way is to have the flash called aspx page at the end of the movie to obtain the dynamic code. This can be done using URLLoader in ActionScript 3.0 or LoadVars in ActionScript 2.0.
URLLoader example
//this is the data
var data = "This is data";
//url of your aspx code
var request:URLRequest = new URLRequest("http://www.yourdomain.com/GenerateCode.aspx");
request.contentType = "text/xml";
request.data = data;
//use POST method
request.method = URLRequestMethod.POST;
var loader:URLLoader = new URLLoader();
try
{
//execute the request
loader.load(request);
}
catch (error:ArgumentError)
{
trace("There is an ArgumentError.");
}
LoadVars example:
//create LoadVars object
var lv_in:LoadVars = new LoadVars();
var lv_out:LoadVars = new LoadVars();
//set onLoad event
lv_in.onLoad = function(success:Boolean)
{
//if success, meaning data has received response from .net page, run this code
if (success)
{
//lv_in.status is use to get the posted data from .Net page
statusMsg.text = "Thank you!" + lv_in.status;
}
//if fail, run this code
else
{
statusMsg.text = "Error!";
}
}
//this is the data
lv_out.data = "This is data";
//begin invoke aspx page
lv_out.sendAndLoad("GenerateCode.aspx", lv_in, "POST");
There another easier way but not the best practice i should say. The easier way would be to direct user to aspx page that generate dynamic code after users finish the flash movie. The negative side is, the page can be accessed although users did not finish the flash movie.
This is a super newbie question on Flex. While I am a seasoned programmer, this is my first ever Flex application; please bear with me for my Flex codes.
I have a web service written in ColdFusion. In this web service, there are two functions; one is to return all the questions in a quiz and the other one is to return all the answer selections to the questions in a quiz.
[Bindable]
private var questionArray:ArrayCollection;
private var cfquiz:RemoteObject;
private function loadQuestions():void {
currentQuestionCounter = 0;
btnPrev.enabled = false;
btnNext.enabled = false;
cfquiz = new RemoteObject("ColdFusion");
cfquiz.source = "CFCertExam.cfquiz";
cfquiz.addEventListener(ResultEvent.RESULT, resultHandler);
}
private function resultHandler(event:ResultEvent):void {
questionArray = event.result as ArrayCollection;
txt1Questions.htmlText = questionArray.getItemAt(currentQuestionCounter).Question_Text;
btnNext.enabled = true;
}
I have the codes above. loadQuestions is called at creationComplete to retrieve the questions. Things are working fine. What I want to do is to call another function within the same web service, returnAnswers, to return the answer options for a question. Since I have cfquiz associated to the web service already, I was using cfquiz to call returnAnswers. However, there is an event listener associated to cfquiz already, resultHandler is being called when returnAnswers comes back with the results.
My questions are, first, is it possible to check which function returns the results within resultHandler? If so, how? And second, what is the best way to handle calls to multiple functions within the same web service?
Thanks in advance,
Monte
Yes you can. You need to specify a handler function for each method which in turn calls a different webservice.
The better way to do this is using AsyncToken and AsyncResponder instead of addEventListener, as following code.
tokenA = cfquiz.methodA();
tokenA.addResponder(new AsyncResponder(onResultForMethodA, onFaultMethodA));
tokenB = cfquiz.methodA();
tokenB.addResponder(new AsyncResponder(onResultForMethodB, onFaultMethodB));
tokenC = cfquiz.methodA();
tokenC.addResponder(new AsyncResponder(onResultForMethodC, onFaultMethodC));
or
tokenA = cfquiz.methodA();
var responderA:IResponder = new AsyncResponder(onResult, onFault, "methodA");
tokenB = cfquiz.methodB();
var responderB:IResponder = new AsyncResponder(onResult, onFault, "methodB");
tokenA.addResponder(responderA);
tokenB.addResponder(responderB);
private function onResult(evt:ResultEvent, token:Object):void {
if(token == "methodA" ) {
//logic for methodA
}
if(token == "methodB" ) {
//logic for methodB
}
}
I'm a little confused as I can't see where you are calling the actual web service function, for example from these examples, I am expecting to see:
cfquiz = new RemoteObject("ColdFusion");
cfquiz.source = "CFCertExam.cfquiz";
cfquiz.addEventListener(ResultEvent.RESULT, resultHandler);
cfquiz.myCFCFunctionCall(); /* where is this? */
Anyway, AFAIK you can create a new instance of the remote object and set that up to have it's own event listener.
Hope that helps.
I'm using Adobe Stratus (now renamed to Cirrus) to build a p2p application. Inside the application, I used NetStream.onPeerConnect callback function and expected it to be triggered every time when a peer is connected. However, it always failed with my friend A while strangely friend B managed to have the function called without any problem.
I was wondering what could be the cause to this issue?
Here are how the code pieces look like.
First of all, create a NetConnection.
netConnection = new NetConnection();
netConnection.addEventListener(NetStatusEvent.NET_STATUS, netConnectionHandler);
netConnection.connect(SERVER_ADDRESS+DEVELOPER_KEY);
Secondly, create NetStream upon NetConnection successfully connected.
private function netConnectionHandler(event:NetStatusEvent):void{
switch (event.info.code){
case "NetConnection.Connect.Success":
sendStream = new NetStream(netConnection, NetStream.DIRECT_CONNECTIONS);
sendStream.addEventListener(NetStatusEvent.NET_STATUS, netStreamHandler);
var sendObj:Object = new Object();
sendObj.onPeerConnect = function(subscriber:NetStream) : Boolean {
trace("[onPeerConnect] far id: " + subscriber.farID);
return true;
}
sendStream.client = sendObj;
sendStream.publish("file");
......
Thirdly, here's how I build the connection between two peers
receivedStream = new NetStream(netConnection, farId);
receivedStream.client = this;
receivedStream.addEventListener(NetStatusEvent.NET_STATUS, incomingStreamHandler);
receivedStream.play("file");
Please help enlighten me. Thanks!
It turns out my friend A is behind a symmetric NAT. I'm thinking to setup a TURN server for us to build a successful connection.
A crazy idea just dropped from the sky and hit me in the head xD. I was wondering if it is possible to make and App capable of listening when the user "adds" new files to a directory.
Example:
The User opens up our Application.
The user adds new files on the desktop (using the Microsoft Explorer).
Our application automatically detects that new files have been added and executes a function or whatever.
Sound interesting right?
Maybe, this could be done using a programming language like Visual Basic and open the executable with the NativeProcess api and listen for an stdOut event... (:
Anyone got and idea to share with us? :)
Thanks
Lombardi
AIR can handle this natively...
the FileSystemList class fires an event directoryChange whenever a file in the watched directory changes.
You can even use it to watch for drives being mounted (I think Christian Cantrell showed that one off)
Ok, I think I'm getting closer, check out this solution! :)
private var CheckDelay:Timer = new Timer(5000, 0);
private function InitApp():void
{
CheckDelay.addEventListener(TimerEvent.Timer, CheckForNewFiles, false, 0, true);
CheckDelay.start();
}
private function CheckForNewFiles(event:TimerEvent):void
{
var FS:FileStream = new FileStream();
var Buffer:File = File.applicationStorageDirectory.resolvePath("FilesBuffer.cmd");
FS.open(Buffer, FileMode.Write);
FS.writeUTFBytes("cd " + File.desktopDirectory.nativePath + "\r\n" +
"dir /on /b > " + File.applicationStorageDirectory.resolvePath("FileList.txt").nativePath);
FS.close();
var Process:NativeProcess = new NativeProcess();
var NPI:NativeProcessStartupInfo = NativeProcessStartupInfo(); // What a large name! xD
NPI.executable = Buffer;
Process.start(NPI);
Process..addEventListener(NativeProcessExitEvent.EXIT, ReadFileList, false, 0, true);
}
private function ReadFileList(event:Event):void
{
var FS:FileStream = new FileStream();
var Buffer:File = File.applicationStorageDirectory.resolvePath("FilesBuffer.cmd");
FS.open(Buffer, FileMode.Read);
var FileData:String = FS.readUTFBytes(FS.bytesAvailable);
FS.close();
var FileArray:Array = FileData.split("\r\n");
var TempArray:ArrayCollection = new ArrayColletion();
var TempFile:File;
for(var i:int = 0;i<FileArray.length;i++){
TempFile = new File(FileArray[i]);
TempArray.addItem(TempFile);
}
}
At the end we got an Array (TempArray) that we could use on a datagrid (for example) with colums like: "extension, File Name, FilePath, etc.."
The files are updated every 5 seconds.
And, why we use all that code instead of a simple "File.getDirectoryListing()"? Because we are updating our application every 5 seconds, if why use getDirectoryListing(), our application will take much more RAM and also, the cmd command is much faster... :)
If you have a better idea, please share it with us! Thank you! :D
1 excellent solution for Windows: use Visual Studio, build the .net app found here http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx
In Adobe AIR use the native process to listen for change events dispatched by .net