I'm working with a large flex applications and I have noticed that one of our largest components (with lots of child canvases) takes about 6 seconds between the initialize and creationComplete events. I've been doing some reading and have found that having lots of nested canvases can cause slowdowns, but i'm not sure if this is where the slowdowns would be?
View 3 RepliesI tried to send some services to fetch data in the creationComplete handler. Then I need to process the server raw data before displaying some sub components. Where should I put these kind of code?
View 2 RepliesIn my flex application I use the viewstack.selectedchild() property to change the views.
When I revisit the views by the viewstack.selectedchild() property the initialize method doesnot get invoked..
Will I take a big hit in performance using nested ViewStacks? Should I strive to handle all navigation in one ViewStack and push children manually or will the affected performance be negligible?
eg.
<viewstack>
<tabnavigator />
<tabnavigator />
<tabnavigator />
</viewstack>
We have a medium size Flex 3.6 application that contains around 20 different page views (managed via a single lazy ViewStack) each having multiple components. Most use custom renderers.All model data is loaded at startup and changes to model instances are communicated via binding and/or collection change events.Once the user has viewed each page at least once, all page views are instantiated and happily listen to update events.Which in effect means that each time a model instance changes, all interested views receive that event and compute derived data or trigger item-renderers.I have tested and confirmed this behaviour in a proof-of-concept application. Even when setting a list to being invisible, it still listens to collection change events and invalidates any renderer affected.What would you do?
View 1 RepliesI have made a tile list is Adobe Flex as follows
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the problem is the creationComplete event is not fired for each PageImageRenderer, and it is fired only for the tiles visible at start so the rectangles drawn in initComponents() is only drawn for those tiles with valid values, and when I scroll to next row using scrollToIndex() function the rectangles are shown with previous values. and no initComponents() is called for these tiles? however the data.name, data.class are correctly displayed but not the rectangles, why it is so? What is the proper event against which I should call initComponents()?
I am using the new Flex4 Spark stuff but I'm stuck at an awful problem. Let me explain a bit of the situation first. I have a container (mx:Canvas) in which I do addElement() of one type instances (DocumentWindow). The document window class is supposed to be the holder for a view according to the type of the document. The DocumentWindow class extends TitleWindow. I also have a task bar which is a mx:Canvas with buttonBar inside so that the windows should be switchable. So in 2 words I got windows holder and a taskbar. The strange thing comes now: When I put a DocumentWindow with type "doc" (which loads swf made by swftools) the window appears in the windows holder and as task on the taskbar.
But if first I open something else - DocumentWindow with type audio or video which causes the DocumentWindow to instantiate different view inside, the window doesn't appear on the screen neither a task button is being shown in the taskBar. I put a trace() on that and it shows that numElements is increasing, the taskBar ButtonBar.dataProvider.length is increased, so the things are there - just that they stay invisible until I open DocumentWindow with type 'doc'? I even tried to make DocumentWindow not to load the view inside because I thought that the only difference is the view... but then even the 'doc' typed DocumentWindow didn't show. A clue may be that creationComplete is never called until a 'doc' view is added.
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I didn't get the difference between those two event.What is the difference between them ?
View 3 RepliesI have a creationComplete="myMethod(event)" in my s:Application, and it runs fine on my 3 flex (Flash Builder 4) development machines. However it is not working on the 2 end user machines I tried it on today!
It is not executing the creationComplete at all, but it is running the application and it seems like all the other code is running fine - with the exception of possibly some other creationComplete code for other components in the app.
On my machines I have tested it under IE 8 and 9, FireFox and Chrome - on all 3 machines.
On these two machines it has the problem on both IE 7 and IE 8. I even installed FireFox new and it also has the issue. After installing the latest flash player and deleting all browser history/cookies it still has the problem.
What might cause the creationComplete to not execute?
Update: I tried using initialize() and no difference.
However, I believe I found the line of code causing the problem:
var isDebug:Boolean = new Error().getStackTrace().search(/:[0-9]+]$/m) > -1;
If I comment that out, it works fine. I need that to know if my app is running in development/debug mode or on an end users machine.
I have a simple component I created which I instantiate in my main program like so:[code]I receive the error "Cannot access a property or method of a null object reference" on the second line because newMessage was not fully created prior to hitting the second line of code trying to set my "body" textarea's text. I know I can build a "creationComplete" event handler, but isn't there a simpler way to do this?
View 2 RepliesI have a component that, once it's all ready, I need to set the state based on a variable I'm reading in from XML. I tried doing it with creationComplete, but it's apparently not ready, as the state isn't being set with elements rendering properly, but the states & rendering work fine if I do a subsequent state change with a click action on some element.
What should I do in this situation to make sure the state gets set at the right time & elements that should appear due to includeIn exist so they can be rendered? initialize instead of creationComplete doesn't seem to do the trick for the first time the component is created. Any successive calls to the component are fine.
I've coded this small snippet to show what I'm not understanding:
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Shouldn't I be able to read loaderInfo inside the creationComplete handler? I'm trying to pass a string from the html to my flash component, that's why I have to get loaderInfo working.
I have created a flex project on flash builder 4. In the MXML I have
xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="init();"
And to check if it runs
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I have a spark DataGrid component with several columns and I want to have my application default to descending order on the first column in the DataGrid. I would like to use the built-in default sort that occurs when clicking the top header once. I have no need to sort the ArrayCollection I'm working with or change what the comparators are.I also want any user-generated sorting such as clicking on a different column's header to override the default sorting.
View 1 RepliesI want to call the sortCompareFunction for a particular row when the grids first loads. Is this possible? Otherwise is there a way to call a sort method on grid load after it has been asssigned the dataprovdier has been updatad
View 2 Replies<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
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Is that because i used both applicationComplete and Initilize together ?
My problem: I have a tab navigator, with many forms in each tab. But I have a single global save button.Problem is, if I don't open a Tab, it doesn't get initialized and therefore the forms it contains do not exist..
How Can I make it as if the user had clicked on every tab?
what the onLoad() or similar Event is in Flex? I'm trying initialize, but no joy.
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How can I initialise two-dimentional typed Vector is AS3? Now I can get working only this:
private var _mainArray : Array = new Array( MyConst.DIMENTION );
public function MyArray()
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I have an AIR app, which keeps its settings stored on the disk.Now, when the application starts, i need to read these values from the disk file and populate the variables in my ModelLocator. My doubt is where to put this code during the App Lifecycle. I have it currently on applicationComplete. Since i am not making any updates to the UI in this code, can i move this initialization code to the 'initialize' event and thereby speed up the startup time?
View 1 Repliesi want to know what i should put befor .mx_internal
override public function initialize() : void
{
var target:DialogButtons;
var watcherSetupUtilClass:Object;
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I need to completely initialize a custom component in my Flex app (i.e. I should be able to access it from action script and get its properties and its children etc), But I do not want to add it to the display or make it visible. I have tried to add it to my visible component, but keep it visible, but often many of its properties are set only when it is drawn, so i don't get what i need. Is there a way to add a custom component to some sort of 'Virtual' display, that is not visible to the user?
View 3 RepliesHow to initialize and make condition for 2 variables in single for loop in Flex let keep i and j are two variables
View 2 RepliesI have quite some experience with Flex and I am just starting to write my first AIR application and would like to use as much Spark as possible here. So I started withe a simple Hello World application:
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Unfortunately this simple example shows no child components and even none of the initialize handlers is triggered. However as soon as I change the root tag to mx:WindowedApplication everything behaves as expected: The label and the button are shown and the console shows the output of the two trace statements.
problem is I have a spark Tabbar, with many forms in each tab. But I have a single global save button.problem is, if I don't open a Tab,it doesn't get initialized and therefore the forms it contains do not exist..
How Can I make it as if the user had clicked on every tab?
I have the following Application tag code in my widget:
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:local="*"
width="100%" height="100%" minWidth="200" minHeight="200" layout="absolute"
creationComplete="init()"
defaultButton="{Send_btn}">
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I am developing a Flex application on top of Mate framework. In this application, I am using a webservice to retrieve data.As this webservice as not a fix location URL (depending on where customers installed it), I define this URL in a config file.When the Flex application starts, it first reads this config file, then I would like to use the value I found to initialize the webservice.But currently, I have no idea how to this.
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this is what i'm trying to accomplish; With a click on a movieclip (cannon_mc)a shot is being fired (ball_mc)
The longer mouse is down, the speed of wich the ball is fired with should increase.My question to you is;
What is the most efficient way to accomplish this? With a timer or something like this;
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I'm devloping some library classes for flocking/steering behaviours on large numbers of objects (2000+). I'm finding that at < 500 instances, performance is reasonable. As the numbers increase, framerate bogs down.
I've seen remarkable performance with libraries such as Flint or Box2D with ridiculous #'s of particles / objects, so it should be possible to optimize / refactor my code to be a bit better.
I'm aware of the basic optimizations, such as bitwise operations and optimized for loops. Are there any more fundamental approaches I should be considering? For example, currently each instance is a vector-based MovieClip. Would working with BitmapData be more efficient?
I am working on an Adobe AIR (2.0) application that contains a feature to allow users to print documents (such as salary slips). Those documents are originally in PDF format. Due to circumstances we cannot directly display those PDFs in the AIR application (for example using flash.html.HTMLLoader). Therefore we convert the PDFs to SWFs (using the pdf2swf tool, see The SWFs are loaded into the application using a mx.controls.SWFLoader, like so:
<mx:SWFLoader
id="salarySlipImage"
loaderContext="{someLoaderContext}"
[code].....