Are all 10-15 markers visible at one time? If not, you might want to consider the 'recycle' method that is employed with item renderers. Either that... or have a single MEGA WONKA sprite where each marker is drawn at the appropriate location.
Rick Winscot On Wed, Jul 23, 2008 at 12:42 PM, Alex Harui <[EMAIL PROTECTED]> wrote: > 10 to 15 shouldn't be a problem. Make sure it is only that many (and you > didn't create more and stack them on top of the others). > > > > Are you saying the addEventLIstener calls are affecting the cpu load? > > > > ________________________________ > > From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On > Behalf Of ibo > Sent: Wednesday, July 23, 2008 8:05 AM > To: flexcoders@yahoogroups.com > Subject: [flexcoders] event listeners on Sprites - performance problem > > > > MIME-Version: 1.0 > Content-Type: multipart/alternative; > boundary="0-617774704-1216825475=:34053" > > --0-617774704-1216825475=:34053 > Content-Type: text/plain; charset=us-ascii > > I created a component what I call bookmark bar where there are markers that > you can click > to jump/scroll to a particular portion of a list (given the index). Similar > to Eclipse/Flexbuilder when you have > errors and there are markers on the right side pane that lets you jump to > the erroneous line. I am using > this for a datagrid using Canvas as parent component. > > var uiComponent:UIComponent = new UIComponent(); > addChild(uiComponent); > > for (var i:int=0; i<_dataProvider.length; i++) { > var bm:Bookmark = _dataProvider[i] as Bookmark; > .... > sprite = new MySprite(); // extends Sprite. Creates an instance Sprite for > each marker > sprite.graphics.lineStyle(3, bm.color, 1, false, LineScaleMode.NORMAL, > CapsStyle.SQUARE); > sprite.graphics.moveTo(x, y); > sprite.graphics.lineTo(x + xOffset, y); > ... > sprite.addEventListener(MouseEvent.CLICK, scrollToLine); > sprite.buttonMode = true; > ... > uiComponent.addChild(sprite); > } > > It works as expected but I noticed it is heavy on CPU and affects the > responsiveness of the > UI. CPU spikes at 55% to 60% even if I only have a few markers (10 to 15). > The lag is very noticeable because just hovering the mouse pointer over the > list, > the item highlighter, delay in rendering the display is very evident. > It doesnt happen on my app when I turn it off. > > Am I doing this right? any workaround? > > Regards, > Stephen > > --0-617774704-1216825475=:34053 > Content-Type: text/html; charset=us-ascii > > <html><head><style type="text/css"><!-- DIV {margin:0px;} > --></style></head><body><div style="font-family:times new roman, new york, > times, serif;font-size:12pt"><div>I created a component what I call bookmark > bar where there are markers that you can click<br>to jump/scroll to a > particular portion of a list (given the index). Similar to > Eclipse/Flexbuilder when you have<br>errors and there are markers on the > right side pane that lets you jump to the erroneous line. I am using > <br>this for a datagrid using Canvas as parent > component.<br><br> > var uiComponent:UIComponent = new > UIComponent(); <br> ! > > addChild(uiComponent);<br><br> > for (var > i:int=0; i<_dataProvider.length; i++) > {<br> > var bm:Bookmark = _dataProvider[i] as > Bookmark; > <br> > > ....<br> > sprite = new MySprite(); // extends Sprite. Creates an instance > Sprite f! or each marker<br> > > sprite.graphics.lineStyle(3, bm.color, 1, false, > LineScaleMode.NORMAL, CapsStyle.SQUARE); > > <br> > > sprite.graphics.moveTo(x, y);<br> > > sprite.graphics.lineTo(x + xOffset, > y);<br> > ... > > <br> > > sprite.addEventListener(MouseEvent.CLICK, scrollToLine);<br&! > gt; > sprite.buttonMode = > true;<br> > ...<br> > > uiComponent.addChild(sprite); > > <br> > }<br><br>It > works as expected but I noticed it is heavy on CPU and affects the > responsiveness of the<br>UI. CPU spikes at 55% to 60% even if I only have a > few markers (10 to 15).<br>The lag is very noticeable because just hovering > the mouse pointer over the list,<br>the item highlighter, delay in rendering > the display is very evident.<br>It doesnt happen on my app when I turn it > off.<br><br>Am I doing this right? any > workaround?<br><br>Regards,<br>Stephen<br></div></div></body></html> > --0-617774704-1216825475=:34053-- > >
