I used Flash player 10, and Flex SDK 3.4. The code as followings:
// Following comes callbacks
function imageLoadOpenCallback(evt:Event):void
{
trace("in--open");
}
function imageLoadCompleteCallback(evt:Event):void
{
trace("in--load");
var fr:FileReference = evt.target as FileReference;
trace(fr.data);
}
function imageLoadErrorCallback(evt:IOErrorEvent):void
{
trace("in--ioerror");
}
function imageSelectCancelCallback(evt:Event):void
{
trace("in cancel");
}
function imageSelectCallback(evt:Event):void
{
trace("in -- select");
for (var i:int=0; i<frl.fileList.length; i++)
{
frl.fileList[i].addEventListener(Event.OPEN, imageLoadOpenCallback);
frl.fileList[i].addEventListener(Event.COMPLETE, imageLoadCompleteCallback);
frl.fileList[i].addEventListener(IOErrorEvent.IO_ERROR, imageLoadErrorCallback);
frl.fileList[i].load();
trace(frl.fileList[i]);
trace(frl.fileList[i].creationDate);
trace(frl.fileList[i].creator);
trace(frl.fileList[i].data);
trace(frl.fileList[i].name);
}
}
// Following comes UI handlers
function onAddPictures():void
{
var imageFilter:FileFilter = new FileFilter("Images", "*.jpg;*.png");
frl.addEventListener(Event.SELECT, imageSelectCallback);
frl.addEventListener(Event.CANCEL, imageSelectCancelCallback);
frl.browse([imageFilter]);
}
Only the imageSelectCancelCallback handler get called when I select some files in the dialog. But no load/open/io_error handler get called at all. I have Google some code example, in which it used FileReference instead of FileReferenceList. I don't know the reason, could you please help me?
In Air the fileReference objects in fileReferenceList do not fire the complete event when doing fileList[i].load(). In a Flex project it works fine. Adobe has not responded to bug reports on this appropriately.
Make sure in your compiler settings for flex, that you have at least 10.0.0 for "Use a specific version".
The main reason to use FileReferenceList instead of FileReference would be if you need to upload multiple files at once. If you only want to allow uploading one file at once, simply use FileReference.
Some clarification: imageSelectCallback(), and NOT imageSelectCancelCallback(), should get called when you select some files in the file browser AND click OK. imageSelectCancelCallback() is only called when you click Cancel.
Other than that, I never used the load() API, but I did use the upload(URLRequest) API. I am not sure what's your use case, but if you need to upload an image to a server, you should use the upload() method.
Speaking of upload events, I experienced some reliability issues when listening to Event.COMPLETE events, so I actually got better results listening to DataEvent.UPLOAD_COMPLETE_DATA.
Related
According to the docs for the Native Client MediaStreamVideoTrack there is a constructor that "Constructs a MediaStreamVideoTrack that outputs given frames to a new video track, which will be consumed by Javascript."
My idéa was then to put frames into this video track, that can later be displayed by javascript in a video tag or passed to a RTCPeerConnection.
I don't know if do it correctly, but from the docs for PostMessage states that it should be supported to pass a resource. But with the simple Native Client code below I only get a warning in the browser console: "Failed to convert a PostMessage argument from a PP_Var to a Javascript value. It may have cycles or be of an unsupported type."
virtual void HandleMessage(const pp::Var& var_message) {
if (!var_message.is_dictionary()) {
LogToConsole(PP_LOGLEVEL_ERROR, pp::Var("Invalid message!"));
return;
}
pp::VarDictionary var_dictionary_message(var_message);
std::string command = var_dictionary_message.Get("command").AsString();
if (command == "create_track") {
pp::MediaStreamVideoTrack video_track = pp::MediaStreamVideoTrack::MediaStreamVideoTrack(this);
pp::VarDictionary dictionary;
dictionary.Set(pp::Var("track"), pp::Var(video_track));
PostMessage(dictionary);
}
}
Am I doing something wrong, or something that isn't just supported? :)
A MediaStreamVideoTrack can only be created by the page (not the plugin) and passed to the plugin by PostMessage. See this example code:
https://code.google.com/p/chromium/codesearch#chromium/src/ppapi/examples/media_stream_video/media_stream_video.cc
https://code.google.com/p/chromium/codesearch#chromium/src/ppapi/examples/media_stream_video/media_stream_video.html
I googled but didn't find a post for Flex mobile..
All I want for now is display an user agreement popup from TabbedViewNavigatorApplication when the user uses the app for the first time
var agreementView: UserAgreement = new UserAgreement();
PopUpManager.addPopUp(agreementView, this,true);
PopUpManager.centerPopUp(agreementView);
but maybe more later.
Please help..
What i did in my desktop air app;
I guess this will work at a mobile app also.
Make sure you have write access;
open yourproject-app.mxml scroll down to the end of the document. In the section, uncomment the following permission:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
Now you can create files like for example an sqlite database.
At the applicationcomplete call the function checkFirstRun:
// functions to check if the application is run for the first time (also after updates)
// so important structural changes can be made here.
public var file:File;
public var currentVersion:Number;
private function checkFirstRun():void
{
//get the current application version.
currentVersion=getApplicationVersion();
//get versionfile
file = File.applicationStorageDirectory;
file= file.resolvePath("Preferences/version.txt");
if(file.exists)
{
checkVersion();
}
else
{
firstRun(); // create the version file.
}
}
public function getApplicationVersion():Number
{
var appXML:XML = NativeApplication.nativeApplication.applicationDescriptor;
var ns:Namespace = appXML.namespace();
var versionnumber:Number =Number(appXML.ns::versionNumber);
return versionnumber;
}
private function checkVersion():void
{
var stream:FileStream= new FileStream();
stream.open(file,FileMode.READ);
var prevVersion:String = stream.readUTFBytes(stream.bytesAvailable);
stream.close();
if(Number(prevVersion)<currentVersion)
{
// if the versionnumber inside the file is older than the current version we go and run important code.
// like alternating the structure of tables inside the sqlite database file.
runImportantCode();
//after running the important code, we set the version to the currentversion.
saveFile(currentVersion);
}
}
private function firstRun():void
{
// at the first time, we set the file version to 0, so the important code will be executed.
var firstVersion:Number=0;
saveFile(firstVersion);
// we also run the checkversion so important code is run right after installing an update
//(and the version file doesn't exist before the update).
checkFirstRun();
}
private function saveFile(currentVersion:Number):void
{
var stream:FileStream=new FileStream();
stream.open(file,FileMode.WRITE);
stream.writeUTFBytes(String(currentVersion));
stream.close();
}
private function runImportantCode():void
{
// here goes important code.
// make sure you check if the important change previously has been made or not, because this code is run after each update.
}
Hope this helps.
Greets, J.
Some you need to store whether the user has agreed to the agreement or not. IF they haven't agreed, then show it.
One way to do this would be to store a value in a shared object. Another way to do this would be to use a remote service and store such data in a central repository. I assume you'll want the second; so you can do some form of tracking against the number of users using your app.
I'm building a Flex app which requires me to download files.
I have the following code:
public function execute(event:CairngormEvent) : void
{
var evt:StemDownloadEvent = event as StemDownloadEvent;
var req:URLRequest = new URLRequest(evt.data.file_path);
var localRef:FileReference = new FileReference();
localRef.addEventListener(Event.OPEN, _open);
localRef.addEventListener(ProgressEvent.PROGRESS, _progress);
localRef.addEventListener(Event.COMPLETE, _complete);
localRef.addEventListener(Event.CANCEL, _cancel);
localRef.addEventListener(Event.SELECT, _select);
localRef.addEventListener(SecurityErrorEvent.SECURITY_ERROR, _securityError);
localRef.addEventListener(IOErrorEvent.IO_ERROR, _ioError);
try {
localRef.download(req);
} catch (e:Error) {
SoundRoom.logger.log(e);
}
}
As you can see, I hooked up every possible event listener as well.
When this executes, I get the browse window, and am able to select a location, and click save. After that, nothing happens.
I have each event handler hooked up to my logger, and not a single one is being called! Is there something missing here?
The problem seems to be with my command being destroyed before this could finish.
For a proof of concept, I set my localRef variable to be static instead of an instance variable, and everything went through successfully! I guess Cairngorm commands kill themselves asap!
I don't know much about Flash but we are working on a site that has a flash form and when the users pick an option, like selecting a value from a drop down list, we need the value to be passed to asp.net server-side code. What's the easiest way to do this?
Flash can invoke server side service. So use GET or POST to pass data
You could explore these options:
1) Communicate between the SWF and the containing page through JavaScript
2) Communicate via asp.net webservices from the SWF directly to the webservice.
3) Not sure but could probably do a POST to a processing aspx page?
HTH
I think a good option is to use the XML class so consider this:
var xmlRequest = new XML();
xmlRequest.onLoad = parseXMLResponse;
xmlRequest.load("http://yourpathtoyourserver/file.aspx?listselectedvalue=something");
function parseXMLRequest(loaded)
{
trace("hi");
}
You can also have the page give you data back this way so it's not just one way communication.
Assuming you are using Action Script 2.
Read the important notes at the bottom of each codes pertain to sending and retrieving data from flash to .net page. Explanation of the code is in the comment inside the code.
Flash Part (Action Script 2)
//function to send collected form data to asp.net page
//use other control/button to call this function
//important: in order for the 'onLoad' event to work correctly, this function has to be 'Void'
function sendForm():Void
{
//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 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 for filling up the form!" + lv_in.status;
}
//if fail, run this code
else
{
statusMsg.text = "The form you are trying to fill up has an error!";
}
}
//this is the collected data from the form
lv_out.userName = txtUserName.text;
lv_out.userAddress = txtUserAddress.text;
lv_out.userBirthday = txtUserBirthday.text;
//begin invoke .net page
lv_out.sendAndLoad("ProcessDataForm.aspx", lv_in, "POST");
}
Important note:
The function that contain onLoad event, in this case sendForm function, has to be Void function, meaning it's not returning value. If this function return value, what happen is the function will be executed all the way without waiting for the returned data from .net page, thus the onLoad event will not be set properly.
.Net Part
public void ProcessData
{
//process the data here
Response.Write("status=processed&");
}
Important note:
To send data/message back to flash, you can use Response.Write. However, if you want Action Script to parse the posted message/data from .Net page keep in mind you have to include & symbol at the end of the message. When parsing data/message, Action Script will stop at & symbol, thus leave the rest of the message alone and only get the message under sent variable.
I'm looking for a way to find the status of a live stream through a VideoDisplay (or any other method really). I am interested to know if the stream is currently being published to or if the publisher has stopped. This is for a Flex/Flash ActionScript 3 project.
Is there a way to do this or is this ANOTHER oversight by adobe?
flex flash adobe adobe-flex actionscript
I've only found one solution, and that's using the NetStream object in combination with a video control.
The video control must be manually added to an
nsListen = new NetStream(nc);
nsListen.addEventListener(NetStatusEvent.NET_STATUS, nsListenHandler);
nsListen.play(streamname);
var v:Video = new Video();
v.attachStream(nsListen);
uicontrol.add(v);
Finally, the event status is returned in nsListenHandler:
private function nsListenHandler(e:Event):void
{
if(e is NetStatusEvent)
{
var nse:NetStatusEvent = NetStatusEvent(e);
if(nse.info.code == "NetStream.Play.Failed")
{
// Big error.
}
if(nse.info.code == "NetStream.Play.PublishNotify")
{
// Stream has just been published
}
if(nse.info.code == "NetStream.Play.UnpublishNotify")
{
// Stream has just been unpublished
}
trace(NetStatusEvent(e).info.code);
trace(NetStatusEvent(e).info.description);
}
}
Only this code wont do is tell you if a stream is already successfully being published to.
You can dig into NetStatusEvent events.
Check this live docs