Hi Eli --
1) The number of series is dynamic but for testing purposes
I'm
working with 384 series and 6 categories.
2) Forgive my ignorance, but
I'm not sure what the difference between
speed and performance is. Originally
I was adding an invisible label
to each series and then only showing them if
the series is big enough
to display the label. It doubled the time between
initialization and
updateComplete so I'm trying to come up with a more
efficient method.
3) I'll try calling validateNow() and see how it
affects performance.
thanks,
Mark
--- In [EMAIL PROTECTED]ups.com,
"Ely Greenfield" <[EMAIL PROTECTED].> wrote:
>
>
>
>
> Hi Mark.
>
> 1) How many series are we talking
about here?
> 2) Are you worried about speed, performance, or both? You
could add a
> label to each series ,but hide it if it isn't
needed.
> 3) try calling label.validateNow() on the label to get it
measured. You
> may waste a little performance, but I would cross that
bridge when you
> come to it.
>
> Ely.
>
>
> ________________________________
>
> From:
[EMAIL PROTECTED]ups.com
[mailto:[EMAIL PROTECTED]ups.com]
On
> Behalf Of Mark
> Sent: Thursday, September 14, 2006 12:41
PM
> To: [EMAIL PROTECTED]ups.com
>
Subject: [flexcoders] Re: How can I add a child element to an AreaSeries
>
based on the render data?
>
>
>
> Thanks Ely. I'll
make sure I cache it.
>
> I'm trying to improve performance and I
seem to be stuck. In this
> case I need to measure the available height of
each series, compare it
> to the height of the label, and then position
the label underneath the
> datapoint with the most height during the
updateDisplayList method.
> Unfortunately, I'm finding that if I want to
measure the height of the
> label I have to add it in the createChildren
method rather than the
> updateDisplayList method because newly added
labels (meaning added
> during the same call to updateDisplayList) return
0 for both
> getExplicitOrMeasuredHeight and
getExplicitOrMeasuredWidth. Is that
> to be expected? I think it is,
which for me is unfortunate because it
> means that I need to add the
label to every single series and then
> remove those that don't fit (which
is the case for 95% of the series).
>
> thanks,
>
mark
>
> --- In [EMAIL PROTECTED]ups.com
<mailto:flexcoders%40yahoogroups.com>
> , "Ely Greenfield"
<egreenfi@> wrote:
> >
> >
> >
> >
Hi Mark. I would make your child creation code cache regardless of
> >
circularity reasons, for performance concerns. I don't believe adding
>
a
> > child automatically invalidates your display list. I'm pretty
sure it
> > _does_ invalidate measurement, which then _potentially_
invalidates
> > display. But the built in series classes won't
invalidate their
> display
> > due to a measurement.
> >
> > Ely.
> >
> >
> >
> >
> > ________________________________
> >
> > From: [EMAIL PROTECTED]ups.com
<mailto:flexcoders%40yahoogroups.com>
> [mailto:[EMAIL PROTECTED]ups.com
<mailto:flexcoders%40yahoogroups.com>
> ] On
> >
Behalf Of Mark
> > Sent: Thursday, September 14, 2006 9:43 AM
>
> To: [EMAIL PROTECTED]ups.com
<mailto:flexcoders%40yahoogroups.com>
> > Subject:
[flexcoders] Re: How can I add a child element to an
> AreaSeries
>
> based on the render data?
> >
> >
> >
>
> Thanks for your response Ely. Is there any concern with a circular
>
> reference? What I mean is if I call addChild in updateDisplayList
>
> that will call invalidateDisplayList, which will ultimately
call
> > updateDisplayList again, right? If I make my child creation
code
> > conditional (so that it only runs the first time I go
through
> > updateDisplayList) will that be enough to avoid the
loop?
> >
> > thanks,
> > Mark Haugen
> >
> > --- In [EMAIL PROTECTED]ups.com
>
<mailto:flexcoders%40yahoogroups.com>
>
<mailto:flexcoders%40yahoogroups.com>
> > , "Ely
Greenfield" <egreenfi@> wrote:
> > >
> > >
> > >
> > >
> > > Hi Mark.
createChildren() is the right place for a compnent to
>
create
> > > 'static' children. But dynamic children...i.e.
children that are
> > created
> > > or destroyed based on
some runtime information, like amount of data,
> > > size on screen,
etc...need to be created elsewhere.
> > >
> > > In
general, I would reccomend custom components create/destroy
>
dynamic
> > > children in their commitProperties() function.
This is because
> > > adding/removing children usually means the
component needs to be
> > > re-measured. Doing it in
commitProperties means you do it before any
> > > pending
measurement happens, and don't end up with unnecessary extra
> > >
measurement passes.
> > >
> > > Charts, however, don't
have a natural measured size. So the various
> > > series types
create and destroy their children as necessary in their
> > >
updateDisplayList() function. At that point, you can be sure your
>
data
> > > is all up to date.
> > >
> > >
Ely.
> > >
> > >
> > >
________________________________
> > >
> >
> From: [EMAIL PROTECTED]ups.com
>
<mailto:flexcoders%40yahoogroups.com>
>
<mailto:flexcoders%40yahoogroups.com>
> > [mailto:[EMAIL PROTECTED]ups.com
>
<mailto:flexcoders%40yahoogroups.com>
>
<mailto:flexcoders%40yahoogroups.com>
> > ] On
>
> > Behalf Of Mark
> > > Sent: Thursday, September 14, 2006
8:46 AM
> > > To: [EMAIL PROTECTED]ups.com
<mailto:flexcoders%40yahoogroups.com>
>
<mailto:flexcoders%40yahoogroups.com>
> > >
Subject: [flexcoders] How can I add a child element to an AreaSeries
>
> > based on the render data?
> > >
> > >
> > >
> > > I'm creating an AreaChart that has labels
inside each area. Very few
> > > of the series will be large enough
to display a label so for
> > > performance reasons I only want to
add labels to those that are big
> > > enough. It seems to me that
the best place to create and add the
> > > label is in
createChildren(), however in examining the renderData,
> the
>
> > filterCache is null and all the bounds values in the cache are
NaN.
> > > Where would be the best place to add the label (as far
as
> performance
> > > goes)?
> > >
> >
> Thanks in advance for any help.
> > >
> > > Mark
Haugen
> > >
> >
>
