Tom, I'm not sure if you are stuck on using charts to do this, but I think I accomplished a similar effect to what you want a while back by using the graphics package to draw a rectangle around a slider. I listened for slider events and would then clear and re-run the drawRect on each move. It was very little code and the effect was quite seamless.
-Mark --- In [email protected], "Ely Greenfield" <[EMAIL PROTECTED]> wrote: > > > > Yup. To do mouse tracking, you generally need a mouse down, mouse move, > and mouse up handler. Almost all of my code that does mouse tracking > looks like this: > > > <someComponent mouseDown="startTracking(event);" /> > > > private function startTracking(e:MouseEvent):void > { > // listen to the systemManager so we get mouse move/up events even > when the mouse moves outside the component. > // listen on capture so we can cancel move/rollover events going to > other components. > systemManager.addEventListener(MouseEvent.MOUSE_MOVE,track,true); > > systemManager.addEventListener(MouseEvent.MOUSE_UP,endTracking,true); > > track(e); > } > > private function track(e:MouseEvent):void > { > // update your data/UI here. > } > > private function endTracking(e:MouseEvent):void > { > track(e); > > // remove the event listeners until we need to track again. > systemManager.removeEventListener(MouseEvent.MOUSE_MOVE,track,true); > > systemManager.removeEventListener(MouseEvent.MOUSE_UP,endTracking,true); > > } > > > > ________________________________ > > From: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of Tom Fitzpatrick > Sent: Tuesday, November 28, 2006 9:37 AM > To: [email protected] > Subject: Re: [flexcoders] Re: Hands-on charts > > > > I'm trying out your suggested approach and ran into a conceptual > problem. I can get the mouse coordinates and convert them to data on the > > mouseDown event - but then how do I track the mouse movement, since that > > uses a different event (mouseMove), and the function I'm working with is > > already tied to the mouseDown? The movement tracking seems necessary to > get the "new" coordinates. > > - Tom > > Ely Greenfield wrote: > > > > > > > > It depends on just how much data you're trying to show in the chart, > > but chances are good that it will be very responsive. > > > > Ely. > > > > > > ---------------------------------------------------------- > > *From:* [email protected] > <mailto:flexcoders%40yahoogroups.com> > [mailto:[email protected] <mailto:flexcoders%40yahoogroups.com> > ] > > *On Behalf Of *tom24569 > > *Sent:* Monday, November 27, 2006 12:08 PM > > *To:* [email protected] <mailto:flexcoders%40yahoogroups.com> > > > *Subject:* [flexcoders] Re: Hands-on charts > > > > Would this happen fast enough that the chart would seem to be > > responding to the mouse movement? > > > > - Tom > > > > --- In [email protected] > <mailto:flexcoders%40yahoogroups.com> > > <mailto:flexcoders%40yahoogroups.com>, "Ely Greenfield" <egreenfi@> > > > wrote: > > > > > > > > > > > > Hi Tom. There's no interative modelling built in, but this should be > > > pretty easy to do: > > > > > > 1) listen for itemMouseDown events. > > > 2) track the mouse position > > > 3) convert the mouse position into data coordinates using the > > > chart.localToData() function. > > > 4) write the new data coordinates into your dataProvider > > > > > > > > > Ely. > > > > > > > > > ________________________________ > > > > > > From: [email protected] > <mailto:flexcoders%40yahoogroups.com> > > <mailto:flexcoders%40yahoogroups.com> > > [mailto:[email protected] > <mailto:flexcoders%40yahoogroups.com> > > <mailto:flexcoders%40yahoogroups.com>] On > > > Behalf Of Tom Fitzpatrick > > > Sent: Monday, November 27, 2006 6:34 AM > > > To: [email protected] <mailto:flexcoders%40yahoogroups.com> > <mailto:flexcoders%40yahoogroups.com> > > > Subject: [flexcoders] Hands-on charts > > > > > > > > > > > > Flex charts work beautifully responding to dynamic changes in data. > > > > > > Using the current components, is there any way to use Flex charts to > > > change data? > > > > > > As a conceptual model, I'm thinking of the way parametric equalizers > > > work in some audio programs, where it's possible to drag nodes on a > line > > > > > > graph vertically or horizontally to change the parametric data. > > > > > > - Tom > > > > > > > >
