[flexcoders] Datagrid scrollbar lag
Hi. I've got a datagrid with about 60 rows and 30 columns. Each has a custom item renderer that extends a Canvas component. The scrollbar that appears is lagging majorly with this set. I've tried cacheasBitmap, Implementing different dataproviders such as XMLListCollection and other things to somewhat speed up the lag-also changing framerate. It seems that the scrollbar lag stays. Anyone have any ideas on this? Best, Austin
Re: [flexcoders] Datagrid scrollbar lag
60 rows and 30 columns. So basically you have 1,800 Canvas objects. Can you try maybe using a lighter item renderer (maybe you don't really need Canvas?)? On 4/25/07, Austin Kottke [EMAIL PROTECTED] wrote: Hi. I've got a datagrid with about 60 rows and 30 columns. Each has a custom item renderer that extends a Canvas component. The scrollbar that appears is lagging majorly with this set. I've tried cacheasBitmap, Implementing different dataproviders such as XMLListCollection and other things to somewhat speed up the lag-also changing framerate. It seems that the scrollbar lag stays. Anyone have any ideas on this? Best, Austin -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links
Re: [flexcoders] Datagrid scrollbar lag
Sorry, I thought you had 60 *visible* rows and 30 *visible* columns :)) (heh). On 4/25/07, Manish Jethani [EMAIL PROTECTED] wrote: 60 rows and 30 columns. So basically you have 1,800 Canvas objects. Can you try maybe using a lighter item renderer (maybe you don't really need Canvas?)? On 4/25/07, Austin Kottke [EMAIL PROTECTED] wrote: Hi. I've got a datagrid with about 60 rows and 30 columns. Each has a custom item renderer that extends a Canvas component. The scrollbar that appears is lagging majorly with this set. I've tried cacheasBitmap, Implementing different dataproviders such as XMLListCollection and other things to somewhat speed up the lag-also changing framerate. It seems that the scrollbar lag stays. Anyone have any ideas on this? Best, Austin -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links
Re: [flexcoders] Datagrid scrollbar lag
On 4/24/07, Austin Kottke [EMAIL PROTECTED] wrote: Hi. I've got a datagrid with about 60 rows and 30 columns. Each has a custom item renderer that extends a Canvas component. The scrollbar that appears is lagging majorly with this set. I've tried cacheasBitmap, Implementing different dataproviders such as XMLListCollection and other things to somewhat speed up the lag-also changing framerate. It seems that the scrollbar lag stays. Anyone have any ideas on this? Alex Harui's blog suggests that extending Canvas in a DataGrid's ItemRenderer is probably not a good idea if you have a lot of visible cells, because of the overhead that comes with using a container (they do a lot behind the scenes that you might not really need). His recommendation is to extend UIComponent directly and programatically lay out your view of the item. e
Re: [flexcoders] Datagrid scrollbar lag
Thanks E, I saw that post. I tried using a DataGridItemRenderer -- extending it and putting the core logic in validateNow. This is the default item renderer Its not a UIComponent. Is there some speed increase by using the uicomponent? I *still* get major lag on the scroll bar after 20 or so records. I then remove the item renderer and its better, but its still laggy. I'm on a dual core 2.8 p4 -- I wouldn't expect the datagrid to run this bad. Any other ideas? Best, Austin Alex Harui's blog suggests that extending Canvas in a DataGrid's ItemRenderer is probably not a good idea if you have a lot of visible cells, because of the overhead that comes with using a container (they do a lot behind the scenes that you might not really need). His recommendation is to extend UIComponent directly and programatically lay out your view of the item. e
