I need to load several images as Bitmap or BitmapData objects. The images are hosted outside the Flex project, and they're referenced by an external configuration file, so I can't embed them. Because the images won't be displayed directly to the user (they're being added to a PDF that is generated for download), creating a grouping of Image objects, attaching them to the application, and waiting for their LoadComplete handler to fire seems inefficient.
What is the best way to load these images into an application?
Have you considered using Loader class?
var ldr:Loader = new Loader();
ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoad);
ldr.load(new URLRequest("image.png"));
function onLoad(e:Event):void
{
var image:Bitmap = Bitmap(LoaderInfo(e.target).content);
var bmpData:BitmapData = image.bitmapData;
//use bmpdata the way you want
trace(bmpdata.width);
trace(bmpdata.height);
}
Related
I have two flex applications Main.mxml(where I have a button called loadDataViewer) and ViewData.mxml. What I want is when the user press the loadDataViewer button, the application ViewData.mxml will open in a new window. Is there any way to do it in Flex?
SWFLoader class looks interesting but I think it will load the other appliation inside the Main application which I don't want. I also saw that there is ExternalInterfaceAPI which can be used to open a url browser but not sure if I can reference the swf file of VewData application. As suggested here( http://learn.adobe.com/wiki/display/Flex/Local+Connections ) that LocalCOnnection can be used to reference one flex application in another but that's only when both applications are open I guess.
Any suggestion to guide me to the right direction wouild be greatly appreciated.
You could embed your viewData swf to an HTML file, and either do any of the following:
Call External Interface...
var url:String = 'myViewData.html';
ExternalInterface.call('window.open("' + url + '")');
or
Call the navigateToURL method...
var url:String = 'myViewData.html';
var urlReq = new URLRequest(url);
navigateToURL(urlReq,'_blank');
Use Modules. Adobe help.
I'm absolute newbie in Flash development but anyway I need to do something.
I have a pure AS3 project that plays video from youtube (chromeless player). I need to add some controls to manage this player. I don't know how to do that? If I just add mxml file into the project nothing happens. How to bind this file to as3?
Thanks
Flex components need to have UIComponent parent to function properly. If your player is based on Sprite, controls will not be initialized.
There is a trick to use Flex controls in the Sprite, but only after initialization in Flex Application. If you don't have Application, no luck.
You could use an AS3-only alternative. One library I've used is minimalcomps which offers some simple but effective controls for use in any AS3 project.
You can't use MXML, but nobody stops you to create your own controls if they are simple.
A short and simple example of how to add a button with an image:
loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
loader.load(new URLRequest('http://i1.nyt.com/images/misc/nytlogo379x64.gif'));
function onComplete(event:Event):void
{
var button:Sprite = new Sprite();
button.addChild(event.currentTarget.content);
addChild(button);
button.buttonMode = true;
button.addEventListener(MouseEvent.CLICK, onButtonClick);
}
function onButtonClick(event:MouseEvent):void
{
trace ('click');
}
This would be the most basic version of a button with a loaded bitmap image.
Normally you would like to check for errors as well... what to do if the image is not found, or when you're not allowed to access it.
If you're going to need more then one button you could make a class which accepts an url, so you could just pass the url to the class and the button would be created.
A completely other way to approach this is with an SWC file, you could create the buttons in the Flash IDE and export them as an swc, which you can embed and use in your pure AS3 project.
I have created a simple SWF-loader in ActionScript 3.0. It loads an SWF from a server and then plays it. While downloading, it displays the "loading" screen.
Its main defect is that it can load only one Flash application - the one which it is compiled for. Let's say it's named test1.swf.
Is there any way to make the loader support more than one Flash app (for example test2.swf and test3.swf)? I mean by passing external parameters to it and not by creating another loader. Is using Javascript the only way to do it? I don't want my loader to require the Javascript support.
And I really don't want to create separate loaders for all of my apps...
Thanks in advance.
In order to load an external SWF your loader only need the url of the swf to be loaded, this url doesn't have to be hardcoded. There are many ways to pass parameters to a SWF file and they don't necessarily require Javascript.
You could load a XML file for instance, a simple text file would work too , you could also use a PHP script. Using flahsvars would require Javascript, although only to set your application in your HTML page.
With the following example , your app doesn't need to recompile , you simply change the url in the text file.
Example with a text file containing a url, something like this:
http://yourwebsite.com/test1.swf
var urlLoader:URLLoader = new URLLoader();
urlLoader.addEventListener(Event.COMPLETE , completeHandler );
urlLoader.load( new URLRequest('swfURL.txt') );
function completeHandler(event:Event):void
{
loadExternalSWF(event.target.data );
event.target.removeEventListener(Event.COMPLETE , completeHandler );
}
function loadExternalSWF(url:String ):void
{
//your code here , using the url value
trace(url );//should return your text file content
}
I have a Flex 3.4 app that embeds a swf with mx:SwfLoader...
That swf has a public function named "playIt". I've tried dispatching events to gettingHere.content, casting gettingHere.content as a MovieClip and other stuff...
var swfApp:MovieClip = MovieClip(gettingHere.content);
if (swfApp.hasOwnProperty("playIt")) {
var helloWorld:Function = (swfApp["playIt"] as Function);
helloWorld();
}
to no avail. Help!
See the example here for interacting with a loaded Flex application.
Essentially:
var swfLoader:SWFLoader; // assuming loading complete
var loadedSM:SystemManager = SystemManager(swfLoader.content);
var loadedApp:Object = loadedSM.application;
app.playIt();
Are you able to load the swf into Flex at runtime rather than embed it? I've had good results loading swfs into Flex after launch, whereas embedding tends to be problematic for accessing a swf API.
Either use Loaders with eventListeners in a script or mx:SWFLoader in MXML with a listener on complete should work for you.
I have a flash application (pure AS, no Flex framework) that I'd like to embed inside of a flex application using SWFLoader.
Embedding one instance works well. However, when I try to embed multiple instances (each with a separate SwfLoader), there is really strange behavior that seems to be caused by clashes among the class definitions of the multiple instances. This flash application is written with a lot of singleton classes, so my guess is that these singletons are overriding each other and causing the weird behavior.
I tried loading the flash application into a child applicationdomain, but that doesn't seem to help much either. Has anyone faced this problem?
You would want to load the SWF into its own application domain (not a child) to avoid name clashing.
There are three types of application domains:
var swfLoader:Loader = new Loader();
var loaderContext:LoaderContext = new LoaderContext();
// child SWF adds its unique definitions to
// parent SWF; both SWFs share the same domain
// child SWFs definitions do not overwrite parents
loaderContext.applicationDomain = new ApplicationDomain(ApplicationDomain.currentDomain);
// child SWF uses parent domain definitions
// if defined there, otherwise its own
loaderContext.applicationDomain = ApplicationDomain.currentDomain;
// child SWF domain is completely separate and
// each SWF uses its own definitions
loaderContext.applicationDomain = new ApplicationDomain();
// Load the swf file
swfLoader.load(new URLRequest("file.swf"), loaderContext);
I would suggest using the first method, as it will not overwrite definitions.