Initializing Custom MXML component
Hello,
I am new to flex and the one thing I can't seem to get a handle on is using custom mxml components. The whole not being able to use a constructor to pass data through was a tough thing to adjust to so for the most part I've been writing my own AS classes for display purposes that extend layout containers like VBox and such. This is getting cumbersome and I would really like to use MXML to save some time when writing display classes. For the most part I'm trying to use custom mxml components this way: I put the labels and other controls and then want data to display as text from the calling class. However, when I try to set the text it says that the control I am trying to set hasn't been initialized yet. My workaround is something like this.
var data1:String = "Something";
var customComp:CustomMXMLComponent = new CustomMXMLComponent();
customComp.initialize();
customComp.someControl = data1;
Now why wouldn't someControl on the custom component be initialized when the actual component is initialized? Is there something I can change in the mxml component so that I don't always have to call .initialize() after creating an instance of the custom component?
Thanks!
. The "initialize" stuff you had was more concerned with the lifecycle of the component. We don't want to do that , but it is something you should learn about. I think the answer to your problem is to create Bindable variables in your mxml class, then set those parameters.
Observe
<Panel>
<Button label="{buttonLabel1}" >
<Button label="{buttonLabel2}">
<Label label = {labelLabel}>
<Script>
[Bindable] public var buttonLabel1:String;
[Bindable] public var buttonLabel2:String;
[Bindable] public var labelLabel:String;
</Script>
</Panel>
Meanwhile , in another class ...
var customComp:CustomMXMLComponent = new CustomMXMLComponent();
customComp.buttonLabel1 = "Ubuntu";
customComp.buttonLabel2 = "Rocks";
customComp.labelLabel = "My Socks";
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Add change event to a custom MXML component
I am building an MXML project in Flash Builder 4.5
I have a custom MXML component that contains a TextInput field. I want the custom component to have a change event that triggers a function in the main application.
I created a test project to try and solve this. At the moment, it appears to trigger an event once and then stops. Please take a look and let me know where I am going wrong. Many thanks.
customComponent.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
width="40" height="20">
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<![CDATA[
[Bindable]
public var value:Number;
protected function inputBox_clickHandler(event:KeyboardEvent):void
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if (event.keyCode == 40 ) {
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]]>
</mx:Script>
<mx:Metadata>
[Event(name="change", type="flash.events.Event")]
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<?xml version="1.0" encoding="utf-8"?>
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<mx:Script>
<![CDATA[
private function changeTestLabel():void
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]]>
</mx:Script>
<CustomComponents:customComponent x="180" y="183"
id="myComponent" value="0"
change="changeTestLabel()">
</CustomComponents:customComponent>
<mx:Label id="testLabel" x="165" y="206" text="Test label"/>
</mx:Application>I have found the solution to this...
The clue was that it worked the first time a change was made, changing the value to the default '0'.
The problem was that the var value is type Number and the inputBox.text is type String.
I therefore added the following function:
protected function textChange():void
value = Number(inputBox.text);
dispatchEvent(new Event('change'))
I also changed the change="dispatchEvent(new Event('change'))" property to
valueCommit="textChange()"
... and that fixed it..
Thanks to all those who took the trouble to look at this -
Custom mxml component extending another mxml component
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you want to maintain a single instance you could use singleton design pattern
read about it
http://en.wikipedia.org/wiki/Singleton_pattern
public class Singleton
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How to create custom MXML component accepting other MXML componenents as children
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For example:
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Thanks in advanceBhè non so se ho capito .. ti spiego la prova che ho fatto io.. Dunque, io ho provato a creare un mio componente Custom e a metterci dentro degli oggetti miei di esempio.. Il componente di esempio si chiama mioComponenteCustom e all'interno è strutturato in questo modo:
<?xml version="1.0" encoding="utf-8"?>
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Al posto dei puntini ci metto quello che voglio.. nel tuo caso i tuoi 2 famosi pulsanti..
All'esterno chiamerò :
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Dove DataGrid è un componente a caso qualsiasi.. Ora, con questa struttura non ricevo errori e sembra andare bene..
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Max -
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As there's no constructor for custom MXML components, how to
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I'm looking for some alternative to avoid the need to rewrite
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feature (a constructor). PopManager is not an alternative...
Is there any way?
The case/situation:
I have a custom MXML component that needs to be dinamically
added to a NativeWindow created using ActionScript.
Thanks a lot!
Vicente Junior
Independent Web Developer
http://teclandoalto.blogspot.commxml classes get generated into AS classes with a default
constructor.
In fact, there is essentially no difference between an AS
component and an mxml component, they can be used exactly the same
way.
Tracy -
Capture event from mxml component
I have an accordian control in my main mxml application. Each
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<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="
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<![CDATA[
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</mx:VBox>
</mx:Canvas>You have several issues, and several options here. First, a
custom event can pass any data you want, and is not very hard to
create.
However, there is a still easier way. All of the Event
objects have a "target" and "currentTarget" property which give you
a reference to the object that dispatched the event.
So, in your component, implement a public property, say like
this:
public function get Title():String{
return _title;
then in a handler function you can do:
private function onMovieTitle(event:Event):void {
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out for reserved words, though
There are two ways to listen for an event. One easy way is to
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concern for you. It has not yet concerned me enough to make me
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The other way is to declare handler on the component itself.
Also, if you use a metadata tag, you can assign the handler on the
mxml tag, instead of using addEventListener():
<mx:Canvas xmlns:mx="
http://www.adobe.com/2006/mxml"
width="200">
<mx:Metadata>
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</mx:Metadata>
<mx:Script>
Then, in you main app:
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Without the metadata, you would do
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Using a bubbling event:
change the dispatchEvent to this:
dispatchEvent(new Event("MovieTitle",true)); //the 'true'
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Tracy -
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Flex does this anyway at runtime, yes? So it seems like it should
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Any help would be appreciated. Thanks!Ok, I realized I was making another mistake and that the mxml
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nice to know how to get a look at AS classes generated from custom
components though... -
Very simple library with one MXML component ERROR
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<mx:State name="restored"/>
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<fx:Script>
<![CDATA[
import flash.events.MouseEvent;
import mx.core.FlexGlobals;
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]]>
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<s:fill>
<s:SolidColor color="#FFFFFF"/>
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</s:Rect>
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In my main application when i try to load the SWF and use the Custom MXML Component i get this error
[SWF] C:\Users\dude\Adobe Flash Builder 4.7\Colibr8\bin-debug\extensions\00 - WindowControlUIPlugin.swf - 8,287 bytes after decompression
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var appFolder:File = File.applicationDirectory;
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Why is this happening?Can you try giving permissions for the player to access your swf file by adding this
Security.allowDomain( '<Location of the swf file>' );
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Thanks,
Sudhir -
Custom AS3 Component / Event Definition for MXML Tag
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I have made an AS3 custom component named,
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on the MXML tag.
I tried using metadata like [Event("selChange")] in the
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Any help / examples to expose a custom event from an AS3
custom component to the MXML tag for the end user/developer would
help significantly.
Anyone? Thank you.Well, That did not take long.
My mistake, Typo type.
[Event(nane="selChange", type="flash.events.Event")]
That is: naNe not naMe :(
Thank you all for your time and responses.
I WILL check my code more closely next time I post a
question.
P.S.: @VarioPegged : My code is big and not needed now. If
you would like it anyway just message me. TY -
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Hello!
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See my problem here?
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Anyway after looking at Flex's documentation I solved it differently;
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Thank you though! -
Custom Pipeline Component stopped changing input filename
Hi
In my project, I have a custom pipeline component to change the input file name. I use it in the receive pipeline decode stage. It was working initially when I had only a receive pipeline and custom pipeline component in my solution. later I introduced
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receive adapter: FILE
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If this answers your question please mark it accordingly. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply. -
How does one define a default style for a custom Flex component?
How does one define a default style for a custom Flex component?
hello
I created a new set of Flex component library slib.swc (Flex 4.5). Would also like to have a default style. defaults.css file, making it the default style of the component library.
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As follows
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@ namespace mx "library :/ / ns.adobe.com / flex / mx";
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<? xml version = "1.0" encoding = "utf-8"?>
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</ s: Application>
I hope CLabelEx default use cn | CLabelEx, style to display its appearance.
I refer to above approach, but failed to achieve. Can you please re-Detailed
Thanks!dj is right. Any Folder can be a picture folder.
Create a root level folder and add it to your Pictures Library in Windows. It will show up with all the scattered pictures from other programs. It can even be a different dirve if you like. You can even specify one to be the default save location for pictures in this dialog.
Navigate to Pictures in your Libraries in Windows Explorer Right Click and select Properties.
Message was edited by: Rikk Flohr forgot the instructions... -
Loading MXML Component Dynamically
Hi all,
I am new to Flex and was trying out small things . I created
a MXML Application and also MXML components.
I tried loading MXML component to application using xmlns and
it worked fine.(
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute" backgroundColor="#ffffff" xmlns:mi="com.*">
<mi:base1 id="base1" />
<mi:base2 id="base2" />
This method is ok if we are loading 3-4 components .
but , if i have to load a mxml component dynamically how do I
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for example ,if base1 and base2 are two components and i want
to load them based on some event performed.
I have tried the method which uses ViewStack and code
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,where each child will have one component declared or initialized.
Following this method is not a feasible when we have hundred
of components to be loaded.
Can anyone help me on this??"srirama.83" <[email protected]> wrote in
message
news:gpkoui$g3u$[email protected]..
> Hi all,
> I am new to Flex and was trying out small things . I
created a MXML
> Application and also MXML components.
> I tried loading MXML component to application using
xmlns and it worked
> fine.(
> <mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
> layout="absolute"
> backgroundColor="#ffffff" xmlns:mi="com.*">
> <mi:base1 id="base1" />
> <mi:base2 id="base2" />
> )
> This method is ok if we are loading 3-4 components .
> but , if i have to load a mxml component dynamically how
do I do it?
> for example ,if base1 and base2 are two components and i
want to load them
> based on some event performed.
>
> I have tried the method which uses ViewStack and code
>
myViewStack.selectedChild=Container(myViewStack.getChildByName(selectedNode))
> ,where each child will have one component declared or
initialized.
>
> Following this method is not a feasible when we have
hundred of components
> to
> be loaded.
> Can anyone help me on this??
>
>
http://www.magnoliamultimedia.com/flex_examples/Amys_Flex_FAQ.pdf
Q4 -
Steps to create a custom Window component?
What steps do I need to take to create a custom Window component? My approach now results in the component being uneditable in design view. What I do is simply select "New > MXML component", base it on spark.components.Window and supply a filename. I tried with a Panel component and that works fine.
Hi,
Step by Step creation of SAP Payroll Funcitons:
1) Follow the menu path
Human Resources>>Time Management>>Administration>>Tools>>Funtions/Operations
or transaction PE04. Enter a four digit name for e.g ZIABC, and press the create
button, enter the description. On creation the system proposes the name of
the routine use it, or enter a name of your choice by selecting the option 'Self-defined'.
2) During the execution of payroll some tables are filled with wage types and there amounts
to make these tables available to your routine enter the name of the table for e.g (RT or
CRT) in the input parameters, and to make the changes done to the data in the tables
avaiable to the payroll enter the name of the table in the Output parameters as well.
Input Parameters
Ctry Num Object Name
99 1 RT
99 2 CRT
and same shall be done in the Output Paramters if required.
3) Create an include in the program PCBURZ990 (using Transaction:
SE38), in which create a subroutine with the name supplied by SAP or the
name selected by you during Funtion creation,
in our case, it is FUZIABC.
Note: The program PCBURZ990 is in SAP Namespace, so an Access Key
will be required before you can proceed. But it will not be overwritten during any upgrade.
*Example of the subroutine
FORM FUZIABC.
*enter the code
ENDFORM.
4) After this activate the program the Funtion and add it in the schema used for payroll processing.
Reward points if helpful.
Regards,
Manoj. -
Hi all,
I am converting a asp.net website to Flex, I have five web pages which I designed as Five mxml components have buttons, grid, combos, text boxes etc.
my question is how do I move between these pages they are distinct in there looks and functionality. I read a lot about view states and I am confused whether view states will solve my issue.
Please tell me how do we handle this usually in flex applications.Hi,
Flex 4 or Flex 3 the answer remains the same, I have a state for each form then I place a container, be it a group a canvas or a panel, in each state to show how states work, the following is in flex 3
The Application
============
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600" currentState="form1" xmlns:ns1="*">
<mx:states>
<mx:State name="form1">
<mx:AddChild position="lastChild">
<ns1:form1 horizontalCenter="0" verticalCenter="0">
</ns1:form1>
</mx:AddChild>
</mx:State>
<mx:State name="form2">
<mx:AddChild position="lastChild">
<ns1:form2 horizontalCenter="0" verticalCenter="0">
</ns1:form2>
</mx:AddChild>
</mx:State>
<mx:State name="form3">
<mx:AddChild position="lastChild">
<ns1:form3 horizontalCenter="0" verticalCenter="0">
</ns1:form3>
</mx:AddChild>
</mx:State>
</mx:states>
<mx:Button label="Form 1" click="currentState='form1'" top="10" horizontalCenter="-150"/>
<mx:Button label="Form 2" click="currentState='form2'" top="10" horizontalCenter="0"/>
<mx:Button label="Form 3" click="currentState='form3'" top="10" horizontalCenter="150"/>
</mx:Application>
The Mxml Component Container (which is exactly what you said you had)
<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="400" height="300" title="First Form">
</mx:Panel>
You can navigate through your 'pages' however you want to, the first example I offered is pure flex the above code is pure flex only using the antiquated sdk which I would advise against for 'new' projects, flex 3 sdk maybe used in flashbuilder but I would only go to this for legacy purposes using the flex 4 sdk is by far the better option.
I try to help where I can, there is no reward for doing this, but I did answer your initial question about states, I hope you get to understand flex a little better with time.
David.
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