I did say ugly :P
If you can rely on calling a method to check for visibility something
like this in your custom component should work I'd think:
public function isReallyVisible():Boolean {
var isVisible:Boolean = visible;
var parent:UIComponent = this.parent;
while(parent != null && isVisible) {
isVisible = parent.visible;
parent = parent.parent;
}
return isVisible;
}
FYI I haven't run that code at all.
Doug
On Sat, Apr 12, 2008 at 8:18 PM, Alex Harui <[EMAIL PROTECTED]> wrote:
>
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>
> I was about to say that #1 and #2 could have serious performance
> implications. Visibility is changed at least once per UIComponent (they are
> invisible when created).
>
>
>
> ________________________________
>
>
> From: [email protected] [mailto:[EMAIL PROTECTED] On
> Behalf Of Doug McCune
> Sent: Saturday, April 12, 2008 8:00 PM
> To: [email protected]
> Subject: Re: [flexcoders] how do I know when a component is invisible
>
>
>
>
>
>
>
>
> "or if its parent's parent is not the current view in a viewstack"
>
> I think when the selected child changes in a ViewStack the ViewStack
> sets the visible property of the old child to false, so checking
> visibility of parents would still work in that case (same with TabNav
> or Accordion).
>
> Doug
>
> On Sat, Apr 12, 2008 at 7:52 PM, Doug McCune <[EMAIL PROTECTED]> wrote:
> > Ugly way #1:
> > Try adding a listener to SystemManager for the FlexEvent.SHOW and
> > FlexEvent.HIDE event using the capture phase. Then when that comes in
> > loop over all the children of the component that is being shown and do
> > whatever it is you need to do when you find a certain component is
> > being shown or hidden
> >
> > Ugly way #2:
> > monkey patch UIComponent. Change the getter for visible. If the
> > UIComponent has normal visibility set to true, then check if it has a
> > parent, if so return the parent's visibility (and since you're monkey
> > patching UIComponent that would trickle all the way up the display
> > list)
> >
> > What is it exactly that you need to do if somewhere up in the display
> > list a parent has visible set to false?
> >
> > Doug
> >
> >
> >
> > On Sat, Apr 12, 2008 at 7:35 PM, Alex Harui <[EMAIL PROTECTED]> wrote:
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > There's no quick answer, you have to test each parent.
> > >
> > >
> > >
> > > ________________________________
> > >
> > >
> > > From: [email protected] [mailto:[EMAIL PROTECTED] On
> > > Behalf Of Jason Rayles
> > > Sent: Saturday, April 12, 2008 10:56 AM
> > > To: [email protected]
> > > Subject: [flexcoders] how do I know when a component is invisible
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > I have some custom components, and they live inside various containers
> > > inside various containers.
> > >
> > > How can I let my components know that they are invisible, whether it is
> > > the component itself that has visible=false or the parent's visibility
> > > is false or if its parent's parent is not the current view in a
> > > viewstack or any other permutation?
> > >
> > > Thanks,
> > > Jason
> > >
> > >
> >
>
>
