Well that's easy enough :)
On Fri, Mar 28, 2008 at 3:41 AM, Jim Boone <[EMAIL PROTECTED]> wrote:
> Josh,
>
> I was able to make the chart work nicely using a stock LineChart
> component and using the cursor from the ICollectionView interface
> implementation. I also profiled the code and didn't see any memory
> issues (other than what is associated with the ARLabelData class which
> is discussed elsewhere). The following are snippets of code that I
> used. I hope it helps someone.
>
> // In class definition
> [Bindable]
> private var metrics:ArrayCollection;
> private var cursor:IViewCursor;
> ...
>
> // In init function
>
> // Populate the array with place holder objects
> var i:int;
> var myArray:Array = new Array(ARRAY_SIZE);
> for (i = 0; i < ARRAY_SIZE; i++){
> myArray[i] = new MetricsVO();
> }
>
> metrics = new ArrayCollection(myArray);
>
> // Store cursor as an instance variable to minimize memory consumption
> cursor = metrics.createCursor();
>
> ...
>
> // In callback handler
> var msg:AsyncMessage = message.message as AsyncMessage;
> var data:MetricsVO = msg.body as MetricsVO;
>
> // Update chart data provider, remove the oldest and add
> // the newest data point
> cursor.seek(CursorBookmark.FIRST);
> cursor.remove();
> cursor.seek(CursorBookmark.LAST,1);
> cursor.insert(data);
>
>
> --- In [email protected] <flexcoders%40yahoogroups.com>, "Josh
> McDonald" <[EMAIL PROTECTED]> wrote:
> >
> > Just implement IList or ICollectionView or whichever interface is
> needed,
> > and keep a pointer to the actual data and "start" and "length"
> variables,
> > and all refresh() when any of those things is updated?
> >
> > I assume this would work, but somebody a little more familiar with the
> > internals of the iterable interfaces and/or charts might be able to
> clarify
> > :)
> >
> > -J
> >
> > On Thu, Mar 27, 2008 at 11:10 AM, Jim Boone <[EMAIL PROTECTED]> wrote:
> >
> > > Josh,
> > >
> > > Yes I actually have. I haven't tried it yet, but I believe if I
> > > initialize the list with a fixed number of entries the X axis delta
> > > will remain constant which is required by my application. The only
> > > thing that I have not figured out is how to efficiently shift the
> > > elements of the array without triggering lots of garbage collections.
> > > In the Java world I would use a linked list implementation of a
> > > collection. I just need to figure out what that same implementation
> > > looks like in ActionScript. Thanks for your your response.
> > >
> > > Jim
> > >
> > >
> > > --- In [email protected]
> > > <flexcoders%40yahoogroups.com><flexcoders%40yahoogroups.com>,
>
> "Josh
> > > McDonald" <dznuts@> wrote:
> > > >
> > > > Have you considered using some sort of proxy IList that hooks
> into your
> > > > datastream but only shows the last n rows? That would allow you to
> > > use the
> > > > various existing chart components.
> > > >
> > > > -J
> > > >
> > > > On Fri, Mar 21, 2008 at 10:30 AM, Jim Boone <jim@> wrote:
> > > >
> > > > > I am attempting to write a dashboard application that shows
> > > real-time
> > > > > dynamic metrics of one of our production applications. I would
> like
> > > > > to plot parameters on graphs similar to what you see in the
> Windows
> > > > > task manager under the performance tab (basically an emulation
> of a
> > > > > moving strip chart). I have considered using the line chart
> component
> > > > > but it doesn't seem well-suited for showing historical trends.
> Does
> > > > > anyone have any ideas on how I should tackle this problem?
> Thanks in
> > > > > advance for your help.
> > > > >
> > > > > Jim
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > "Therefore, send not to know For whom the bell tolls, It tolls for
> > > thee."
> > > >
> > > > :: Josh 'G-Funk' McDonald
> > > > :: 0437 221 380 :: josh@
> > > >
> > >
> > >
> > >
> >
> >
> >
> > --
> > "Therefore, send not to know For whom the bell tolls, It tolls for
> thee."
> >
> > :: Josh 'G-Funk' McDonald
> > :: 0437 221 380 :: [EMAIL PROTECTED]
> >
>
>
>
--
"Therefore, send not to know For whom the bell tolls, It tolls for thee."
:: Josh 'G-Funk' McDonald
:: 0437 221 380 :: [EMAIL PROTECTED]
