I'm not sure what happens in memory but I have an application with a PlotSeries and every time the trend switches to either positive or negative I have to display a green or red arrow (around 10-15 times on an average chart) and when I was monitoring it during development I was able to see each request to the server.
You could cache the images with a Dictionary object (google cached itemRenderers for example code). I would suggest using the source pointed to the server at first and if you see any lag, then you can embed the images or try some kind of caching On Tue, Nov 17, 2009 at 1:03 PM, Vivian Richard <[email protected]> wrote: > > > > Got your point - very clearly. But Every time a point is rendered, does > it mean > that for each point all the images will be attached with the app. I mean > is there > a possibility that these images will be duplicated? > > > > > > On Tue, Nov 17, 2009 at 10:57 AM, Jake Churchill <[email protected]>wrote: > >> >> >> Yes, that is possible but you have to remember that each image you display >> will be a subsequent request to the web server. If you embed the image, you >> embed it once and use it a bunch of times without subsequent requests. >> >> >> On Tue, Nov 17, 2009 at 12:54 PM, Vivian Richard <[email protected]>wrote: >> >>> >>> >>> >>> >>> Is it possible to do it with out embedding the image? Just >>> creating am iamge and then pointing the source of the image >>> to the image component. Instead Embedding all the images. >>> >>> >>> On Tue, Nov 17, 2009 at 10:07 AM, turbo_vb <[email protected]> wrote: >>> >>>> >>>> >>>> Just read your last post a little more. To add an Image control, first >>>> create a var: >>>> >>>> private var myImage:Image; >>>> >>>> Then in createChildren(): >>>> >>>> override protected function createChildren():void >>>> { >>>> super.createChildren(); >>>> >>>> if ( !myImage ) >>>> { >>>> myImage = new Image(); >>>> addChild( myImage ); >>>> } >>>> >>>> } >>>> >>>> -TH >>>> >>>> >>>> --- In [email protected] <flexcoders%40yahoogroups.com>, >>>> "turbo_vb" <timh...@...> wrote: >>>> > >>>> > >>>> > >>>> > Ok 2 things, better to change the image in the set data method and >>>> then invalidateDisplayList(); because updateDisplayList gets called a lot >>>> more frequently than than the data changes. And for the image, add an Image >>>> control to the UIComponent itemRenderer in createChildren. (remember to >>>> setActualSize and position in updateDisplayList). Then when the data >>>> changes, inspect it and change the source of the image to one of several >>>> embedded image classes in the itemRenderer. Something like: >>>> > >>>> > [Embed(source="../assets/butterfly.gif")] >>>> > public var myButterfly:Class; >>>> > >>>> > [Embed(source="../assets/grassHopper.gif")] >>>> > public var myGrassHopper:Class; >>>> > >>>> > public function set data(value:Object):void >>>> > { >>>> > // perform conditional logic here >>>> > // don't know your code, so psuedo >>>> > if ( butterfly ) >>>> > { >>>> > myImage.source = myButterfly; >>>> > } >>>> > >>>> > if ( grasshopper ) >>>> > { >>>> > myImage.source = myGrasshopper; >>>> > } >>>> > >>>> > super.invalidateDisplayList(); >>>> > } >>>> > >>>> > -TH >>>> > >>>> > --- In [email protected] <flexcoders%40yahoogroups.com>, >>>> Vivian Richard <kanpsack@> wrote: >>>> > > >>>> > > Thanks for the reply. I got the logic part. In updateDisplayList I >>>> get >>>> > > the >>>> > > data like data.item.type = spider or bee or butterfly ..... >>>> > > >>>> > > so depending on the type I want to show the image of the insects. >>>> But >>>> > > the problem is since this itemrenderer inherits UIComponent, I >>>> cannot >>>> > > or do not know how to add an image on it. >>>> > > >>>> > > >>>> > > >>>> > > >>>> > > On Tue, Nov 17, 2009 at 9:28 AM, turbo_vb <TimHoff@> wrote: >>>> > > >>>> > > > >>>> > > > >>>> > > > Thanks Vivian, >>>> > > > >>>> > > > For the plot chart, you can do the same type of thing, except with >>>> more >>>> > > > images, with an itemRenderer. Just like the way you can change >>>> icons, or >>>> > > > images, in a List itemRenderer, the same can be done with a chart. >>>> In the >>>> > > > last sample, you can see how to inspect the data; to determine >>>> which image >>>> > > > class to display. This next < >>>> http://www.timothyhoff.com/projects/ChartLabeledRendererSample/srcview/index.html >>>> > >>>> > > > Sample< >>>> http://www.timothyhoff.com/projects/ChartLabeledRendererSample/ChartLabeledRendererSample.html >>>> > >>>> > > > shows how you can use an itemRenderer that extends UIComponent. >>>> This is >>>> > > > a little different than creating an itemRenderer that extends >>>> > > > ProgrammaticSkin, as it gives you a lot more flexibility. Between >>>> the two >>>> > > > samples, you might be able to come up with a solution. If you get >>>> stuck, >>>> > > > please feel free to reach out. >>>> > > > >>>> > > > -TH >>>> > > > >>>> > > > --- In [email protected] <flexcoders%40yahoogroups.com>, >>>> Vivian Richard <kanpsack@> wrote: >>>> > > > > >>>> > > > > Liked your example. Sleek!!! By the way I am trying to write an >>>> > > > > itemrenderer >>>> > > > > for plot chart. Depending on the value of the plot item I want >>>> to show >>>> > > > > different >>>> > > > > icons in the plotted spot. These is an example of plot chart >>>> where you >>>> > > > > can >>>> > > > > embed an image but in that way you can only put same image in >>>> one series. >>>> > > > > Here is the link: >>>> > > > > >>>> > > > > >>>> > > > > >>>> > > > >>>> http://livedocs.adobe.com/flex/3/html/help.html?content=charts_formatting_12.html >>>> > > > > >>>> > > > > The butterfly example - I am talking about. >>>> > > > > >>>> > > > > >>>> > > > > >>>> > > > > On Mon, Nov 16, 2009 at 3:02 PM, turbo_vb TimHoff@ wrote: >>>> > > > > >>>> > > > > > >>>> > > > > > >>>> > > > > > Cool, yeah I should have said custom lineSegmentRenderer. >>>> > > > > > >>>> > > > > > >>>> > > > > > -TH >>>> > > > > > >>>> > > > > > --- In >>>> > > > > > [email protected]<flexcoders%40yahoogroups.com><flexcoders% >>>> 40yahoogroups.com>, Jake >>>> > > > >>>> > > > > > Churchill reynacho@ wrote: >>>> > > > > > > >>>> > > > > > > THANK YOU. I have seen this before and I've been looking for >>>> it >>>> > > > forever. >>>> > > > > > > The stinking chart components are all in the dataviz SWC and >>>> I >>>> > > > couldn't >>>> > > > > > get >>>> > > > > > > past a null error I was getting. >>>> > > > > > > >>>> > > > > > > On Mon, Nov 16, 2009 at 4:43 PM, turbo_vb TimHoff@ wrote: >>>> > > > > > > >>>> > > > > > > > >>>> > > > > > > > >>>> > > > > > > > Sorry bout that, let's try it again: Sample< >>>> > > > > > >>>> > > > >>>> http://www.timothyhoff.com/projects/LineRendererSample/LineRendererSample.html >>>> > > > > > > >>>> > > > > > >>>> > > > > > > > >>>> > > > > > > > >>>> > > > > > > > -TH >>>> > > > > > > > >>>> > > > > > > > --- In >>>> > > > > > > > [email protected]<flexcoders%40yahoogroups.com><flexcoders% >>>> 40yahoogroups.com>, >>>> > > > Jake >>>> > > > >>>> > > > > > Churchill <reynacho@> wrote: >>>> > > > > > > > > >>>> > > > > > > > > I've been trying something like this but item renders >>>> and actual >>>> > > > > > segments >>>> > > > > > > > of >>>> > > > > > > > > the line seem to be drawn separately. By the way, your >>>> link >>>> > > > doesn't >>>> > > > > > work. >>>> > > > > > > > > >>>> > > > > > > > > On Mon, Nov 16, 2009 at 3:35 PM, turbo_vb timh...@wrote: >>>> > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > Hi Jake, >>>> > > > > > > > > > >>>> > > > > > > > > > You could do it with a custom itemRenderer and control >>>> the >>>> > > > alpha or >>>> > > > > > > > actual >>>> > > > > > > > > > drawing; based on a data property. Here's a custom >>>> renderer >>>> > > > sample >>>> > > > > > to >>>> > > > > > > > get >>>> > > > > > > > > > you started: >>>> > > > > > > > > > >>>> > > > > > > > > > Colored Line Chart Sample< >>>> > > > > > > > >>>> http://www.flashcomguru.com/index.cfm/2009/11/11/pdf-for-flex-devs >>>> > > > > >>>> > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > -TH >>>> > > > > > > > > > >>>> > > > > > > > > > --- In >>>> > > > > > > > > > [email protected]<flexcoders%40yahoogroups.com><flexcoders% >>>> > > > 40yahoogroups.com>, >>>> > > > >>>> > > > > > Jake Churchill reynacho@ wrote: >>>> > > > > > > > > > > >>>> > > > > > > > > > > I'm struggling with how to hide a section of a >>>> LineSeries. >>>> > > > Does >>>> > > > > > > > anyone >>>> > > > > > > > > > have >>>> > > > > > > > > > > any pointers or links to point me in the right >>>> direction? >>>> > > > > > > > > > > >>>> > > > > > > > > > > Thanks! >>>> > > > > > > > > > > >>>> > > > > > > > > > > -Jake >>>> > > > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > > >>>> > > > > > > > > >>>> > > > > > > > >>>> > > > > > > > >>>> > > > > > > > >>>> > > > > > > >>>> > > > > > >>>> > > > > > >>>> > > > > > >>>> > > > > >>>> > > > >>>> > > > >>>> > > >>>> > >>>> >>>> >>> >> > >
