How you reference something depends on how you want to use it.
If you are programmatically getting data or executing methods or setting
properties, reaching up through the component chain is fine, even using
mx.core.Application.application.
But beware if you are binding. For binding to work correctly, you need
a declared, TYPED variable or property in the component itself.
Text="{mx.core.Application.application.myArray}" will not work reliably
If you are binding, pass a reference to the parent into the child
component, being sure to declare the type for the property. If you pass
in a reference to the Application, the type should be the application
name.
By the way, I do not believe passing references is going to have any
performance impact. Before I learned how to pass a reference to the
application, I was routinely passing 30+ references into components.
Changing that has not resulted in any noticeable performance increase.
You are just passing a "pointer" after all.
Tracy
-----Original Message-----
From: Mehdi, Agha [mailto:[EMAIL PROTECTED]
Sent: Friday, March 18, 2005 3:34 PM
To: '[email protected]'
Subject: RE: [flexcoders] ViewStack beheviour
There's a property called "parent" of mx.core.UIObject. All the
containers,
controls etc extend this Object. This property represents the parent
container of the current control. For eg
<mx:ViewStack id="myVS">
<test:child1/>
<test:child2/>
</mx:ViewStack>
In both of these children, you can get to the stack by:
parentStack = this.parent;
-----Original Message-----
From: Krzysztof Szlapinski [mailto:[EMAIL PROTECTED]
Sent: Friday, March 18, 2005 11:32 AM
To: [email protected]
Subject: Re: [flexcoders] ViewStack beheviour
> Couldn't you just get to the parent, which is the ViewStack, of those
> children from within those children instead of passing the parent into
> each of them?
what do you mean by this?
i did it the way the docs says it shoul be done. at least I think so:)
if
there is a better solution I would be pleased to learn it.
one thing to add - these components use some external actionscript
functions
which operates on the "vs" object
krzysiek
> -----Original Message-----
> From: Krzysztof Szlapinski [mailto:[EMAIL PROTECTED]
> Sent: Friday, March 18, 2005 10:01 AM
> To: [email protected]
> Subject: Re: [flexcoders] ViewStack beheviour
>
>
>
> Yeah, these components have functions that handle this "vs" and its
> children.
> btw
> creationPolicy set to "all" made the problem go away but unfortunately
> all the controls which were invisible became visible :( is it normal
> behaviour that creationPolicy = "all" makes all controls visible even
> if they have visible property set to "false"?
>
> krzysiek
>
>
>>
>> One more thing that I noticed is that you're passing "vs" to every
>> child of the stack? That might also be the cause. Any reason behind
>> that?
>>
>> -----Original Message-----
>> From: Steven Webster [mailto:[EMAIL PROTECTED]
>> Sent: Friday, March 18, 2005 8:24 AM
>> To: [email protected]
>> Subject: RE: [flexcoders] ViewStack beheviour
>>
>>
>>
>>>
>>> The nextButton navigates to the next viewstack element. My problem
>>> is that each component is displayed very slowly.
>>> It takes about 5 sec. to generate about 20 objects in each
component.
>>>
>>> How can I reduce this time?
>>>
>>
>> Do a search for creationPolicy in the livedocs; you should be able to
>> defer or queue the instantiation of your non-visible views in the
>> ViewStack, and spread the performance hit over time.
>>
>> Steven
>>
>> --
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>> Technical Director
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