Flex :: Initialization - Completely Initialize A Component But Not Add It To The Display?
Dec 20, 2011
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?
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Dec 5, 2005
I initialize the "point" object like:
point = {x:'209', y:'270'};
trace(point.x);
this is working fine, But I have to initialize the "point" object with a string variable which holds the initialization properties like:
[Code]...
I know this is not working. Is there any method to initialize the object with a string variable which holds the initialization properties (without parsing the text) ?
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Oct 25, 2010
I am loading a component which makes a HTTPService call to get data that will then be used to set certain variables in the component. I make the HTTPService call in an init() function (for the initialization event) and then set the variables according to the data received in the HTTPService result handler. However, the variables are still null at both the initialize stage and at the creationComplete stage. If I try and read the variables in a creationComp() function (for the creationComplete event), those variables are still null. Is this correct?
I guess I don't understand the flex initialization cycle very well. When are those variables actually set and available to be used? I need to manipulate those variables automatically after the component loads. Is there an event that comes after creationComplete that is appropriate or some other way to approach this? I am using Flex 3.
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Mar 1, 2011
I'm experiencing some strange text rendering behavior in the Spark RichEditableText component.
<?xml version="1.0" encoding="utf-8"?>
<s:Application
xmlns:fx="[URL]"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
[Code] .....
The above application simply navigates through the five sentences in the DATA array (every time the Next button is pressed). For whatever reason, RichEditableText component doesn't completely reset its view (by clearing the previous text) before setting new content. From what I can gather, this faulty rendering is somehow based on the combination of line count and relative width. I also discovered that if I set the width property of the RichEditableText component to an absolute value (say, 100) as opposed to relative (percentage, 100%) the text is rendered correctly. As far as I can see, this behavior is unintended and is, in fact, a bug.
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Jun 23, 2010
Is it "better" to initialize AS3 class variables in the class constructor? Or can I just initialize them to their default value when I declare them at the top of my class? I ask because when there's a lot of class variables, it appears inefficient to declare them in one place and then initialize them in another when I could easily do both in the same place. It one option is better than the other,
[Code]...
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May 10, 2011
I've got a component written for my app by a third party developer and am trying to integrate it, but I've found a bug that seems like it's either a compiler bug, or there's something with how Flex and static variables work that I wasn't aware of.Basically, I have this:
public class ModeChangeController {
public static const DISPLAY_MODE:String = "DisplayMode";
}[code]...
If I use //V2 (i.e. comment out V1), a bug occurs at the startup of the application (some TextFields are uneditable and contains no text), but with //V1 and not V2, it works fine. If I comment out both, that also works fine (I don't get the TextField bug).It took me a while to figure out that it was that static const String that was causing the issue, but I'm still not sure why or if there's something I can do about it except for just moving the DISPLAY_MODE to Events (which is what I've done at the moment, but it's not a particularly nice solution).There are no errors in the log. The order of the includes in my BorderContainer code doesn't matter. I've googled for "as3/flex static initialization order" but haven't found anything.
Clarification: showInitialView() never gets called. It doesn't get there before the other bug shows up. Just having the V2 line there causes the problem.
Update: I've fixed my problem with the TextInput strings not showing: Turns out that adding the component caused the Tahoma font to not show up. However, setting the font-weight to bold fixed that problem, or switching to Arial. With that said, the original question still stands, because when I ran it without V2, it found Tahoma with normal font-weight.
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Jun 24, 2010
To remove a dynamic displayObject completely you need removeChild or removeChildAt(index) remove all the refrences to the displayObject nulling the displayObject
But this is my case
PHP Code:
//here recto is a MovieClip on stage//i creat a dynamic display Object named newMcvar newMc:MovieClip =new MovieClip();newMc.graphics.beginFill(0x000000,1);newMc.graphics.drawRect(0,0,10,10);newMc.graphics.endFill();recto.addChildAt(newMc,1);//i refrence the newMc using
[Code].....
I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc
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Jun 24, 2010
To remove a dynamic displayObject completely you need removeChild or removeChildAt(index) remove all the refrences to the displayObject nulling the displayObject
But this is my case
ActionScript Code:
//here recto is a MovieClip on stage
//i creat a dynamic display Object named newMc
var newMc:MovieClip =new MovieClip();
[Code].....
I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc
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Jun 24, 2010
To remove a dynamic displayObject completely you need
RemoveChild or removeChildAt(index)
Remove all the refrences to the displayObject
Nulling the displayObject
But this is my case
PHP Code:
//here recto is a MovieClip on stage
//I creat a dynamic display Object named
newMcvar newMc:MovieClip =new MovieClip();
newMc.graphics.beginFill(0x000000,1);
newMc.graphics.drawRect(0,0,10,10);
[Code] .....
is referencing newMc or creating a copy of it. I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc.
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Sep 3, 2011
to point out some good tutorials on creating applications in flex that are don't have UI's?Actually, it looks like all I really need to know is how to call afunction upon initialization of the flash object. I tried the creationComplete attribute, but it doesn't work in browser.
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Jan 26, 2010
Once you load an actionscript page from scratch (in my case loading XML data from a file, initializing various other elements in a fairly time consuming way) if you navigate away from that page and then return to it, (via the browser 'back' key for example) is their a way to forego the previous initialization and just immediately bring up the previous Actionscript page in its fully initialized state.
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May 29, 2009
I used a FlexBuilder Library Project to create a custom component library (swc). The custom component is a control bar with text fields and buttons, etc.The vast majority of our team's code is done in pure AS3 I've successfully included my new SWC in the lib and build path in our AS3 project.I've also successfully instatiated an instance of my custom component, but for some reason, it will not display. I know it exists, because 1) the compiler had no complaints, and 2) I can trace property values of the custom component and get valid output from the trace statement.
trainer.games.board.MatchThree {
import flash.display.Sprite;
public class Test extends Sprite{
[code].....
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Feb 3, 2010
I have used Flash to make skins, which I import and apply to Flex components.But how can I create a component in Flash, with properties and methods. And make it able to be added to the displayList in a Flex app?I installed the Flex component kit for flash. Created my component in flash (it extends MovieClip). Did Command->Convert to flex Component, did File->Published, which gave me a .swc, dropped the .sec file into my Flex project. Now when I create a new var the class "FlashFlexComponentTest" pops up in the new class hint box, so flex sees it. But afterwards I get the error: [code]I added the .swc via project build path -> add SWC.I no longer have a compile-time error but I am getting a runtime error:[code]
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Feb 16, 2011
i want to implement this.archive/flex/tourdeflex/web/#docIndex=1;illustIndex=0;sampleId=0)type of structure in my application.how can i display different component in differentparts.
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Nov 18, 2009
I am putting together a presentation on flex for adobe user group that specialize in coldfusion. In my example I would like to display the text of the cfc being called from the webservice tag in my flex application. Is there a simple way to load the actual text for the cfc instead of the html that coldfusion is passing back to my URLloader variable?
[Code]...
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Sep 29, 2010
Is there a way display the display list in the Tree component. I could parse the display list into xml but then I would not be able to create a reference to the display object.
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Jul 12, 2011
I've created a component which is basically a meter (extends skinnable container). The skin to the component contains two rectangles (background and the actual meter). This component receives an arraycollection with the following fields value, max and min(the arraycollection I am passing is Bindable). When I initialize and pass the data to be used to draw It works great (keep in mind - only works the first time). I've created a button that changes the data array and shows the current meter value. Apparently the meter's value is changing everytime I modify the ArrayCollection I've set to be used for rendering.(dont want to say "dataProvider" because it is not a Flex dataprovider, just a variable )... here is the code...
public class meter extends SkinnableContainer {
[SkinPart( required = "true" )]
public var meter:spark.primitives.Rect;
[Code]....
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May 22, 2009
I have an arrayCollection of objects that extend Sprite, and have bitmaps within them. I want to display these in a list (or some other component that would allow a user to scroll through them, and see their associated data.)
When I do: myList.dataProvider = myArrayCollection
the list just shows a bunch of lines of [Object, Item] instead of the visual sprites.
Here is a simplified version of my Object:
public class myUIC extends UIComponent
[Code]...
Tried many different ways to get it to show up in a List, but can't do it.
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Feb 22, 2011
Following error is arising if I use NavigatorContent in Repeater. Is there a way to initialize image and lable on which I am encountering following error: Unable to generate initialization codewithin Repeater, due to id or databinding on a component that is not a visual child.
Code:
<mx:Repeater id="rep" dataProvider="{usersArray}">
<s:NavigatorContent width="100%" height="100%" label="{rep.currentItem.name}" >
[code]....
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Mar 3, 2011
My Flex application (SWF) initialization takes 25 second to load 1.6mb SWF in widescreen monitor. The same SWF loads pretty fast (3 Sec) in Flat panel monitor 1024x768 resolution. What is the reason for +/- in rendering speed , +/- in CPU utilization on different monitors , screen resolution.
note: my internet sepped is 10+ mbps broadband.
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May 27, 2011
I am trying to write a simple multicore PureMVC helloword. I am getting Error: multitonKey for this Notifier not yet initialized!
[Code]....
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Jun 7, 2011
I have a Spark list with a customItemRenderer that is taking a good 3 seconds to initialize with just 50 items.
I'm using Flex 4.5, my ItemRenderer is already very optimized, using as little nesting as possible, fxg and so on.
Is anyone having similar issues? I've tried almost everything in the book bar going back to mx.
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Jul 21, 2009
Here is part of my code in short:
[Code]....
I realized that if I do addChild, I can't really see the dynamically added component, since flex did not reserve space for my List to display. So I do parentDocument.addChild, and then it appears no problem. My question is since it's being added in the parentDocument, so it is suppose to be a component belong to parentDocument, so is that component still be able to call this handleMouseDown? From my experience, it's still able to, but which doesn't make sense to me. Can someone explain a little about why it can still work, or any better approach other than parentDocument.addChild
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Sep 3, 2009
The jist of what I'd like to know and focus on understanding, is details on how binary deserialization occurs in Flex 3. When is the constructor called, when are properties set, are private members serialized or does all deserialization occur on and through setters, etc? I'm having a hard time finding information on this.In a Flex 3 AIR application, I have a pretty complex object graph(just a bunch of objects referencing one another, kinda like a big data model except a bit more complex) that I serialize to a file using a single call on the FileStream.writeObject and readObject on a root object, which serializes and deserializes the entire object graph.I found that I needed to always have a default constructor, else I would get exceptions on the objects when deserializing if they were part of an ArrayCollection. So I had to eleminate the constructor parameters or set default values. I now have many setters like this in my classes, such as the below where mConnection accumulates some information it needs through different setters, where as before I had this all packed into the constructor since all of the information is really necesary for the Connection to function:[code]So the connection's serverIP is still an empty string because the server was assigned to the client's property before the server was completely initialized.
I could probably resolve this by using binding so that updates to the serverip in the server are bound to the connection, but I find binding properties to be fairly complicated (it's really simple on UI in mxml cause you just use the curly bracket syntax but doing it by code is what I found complicated). I have also resolved some cases by removing the constructor parameters entirely, so that there is no default values. All that aside, I still really need a deeper understanding of the details of binary serialization as far as how it rebuilds the object graph. I even have circular references, and it seems to handle those fine and maintain multiple references without duplicating objects. It's just when my constructors/setters are more complex that I'm running into these problems because of the order of what occurs during deserialization. It is really inconsistent though, as adding breakpoints in various places seems to influence the order that things occur, making it more difficult to debug.On a side note for anyone that might sidetrack the topic because I am serializing a class called Connection. I added some code to address some things, like in the Connection class there is an instance of a Socket. Of course my socket would not be connected after I close and reopen the application and deserialize it, so before I serialize my object graph, I go through and close the socket and set the reference in the Connection class to null, so that there is no longer a reference to the socket and thus it will not get serialized. After deserialization on the next application run I create a new socket.
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Jan 25, 2012
I am working on a server push from Java to Flex. But some how the MessageBrokerServlet is not getting initialized, seems like it is calling a method from: flex.messaging.config.LoginCommandSettings.setMatch() Eventually I found out that this method indeed does not exist in that class (LoginCommandSettings). I there something else that is going wrong?
[Code]....
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Aug 31, 2009
I'm trying componentize one of the pieces of UI in an AIR application that I'm developing in Flex. In this example, I want to display file information on a single line (which has an icon, some text/link and the size).
My code looks like this (component is called FileDisplay):
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="[URL]"><mx:Script>
<![CDATA[
public function set iconType(source:String):void {
this.ficon.source = source;
[Code] .....
However, when I do this, I get an error: Error #1009: Cannot access a property or method of a null object reference. This is because the child components of the FileDisplay are null (or at least they show up that way in the debugger). Am I supposed to be waiting for events indicating the child components were created? For now I can manually do everything in ActionScript in my main app (create a Canvas and add children to it) but how to separate the code more cleanly.
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Nov 19, 2011
I'm trying to make a Flex Tree Component display the children of a sprite in a hierarchical way. Moreover, dragging the items on the FlexTree would resort and reparent the items. I have special Elements set as Folders. This would allow other elements to be added there as a children by dragging an element on the tree and dropping it there. I have a failed attempt which works, but breaks when I try to add folders. Basically, it fails at reparenting the items by dragging and resorting folders and that Does anyone know of a component or something which can do this, has anyone have created any of this or could anyone give me a clue?
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Dec 3, 2009
I 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
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Sep 26, 2011
<?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"
[Code]....
Is that because i used both applicationComplete and Initilize together ?
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Dec 2, 2009
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?
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