Nope... I use it quite a bit. Must be a bug in the way you are
specifying the renderer. Can you post a code snippet?
Scott
Scott Melby
Founder, Fast Lane Software LLC
http://www.fastlanesw.com
letterpigeon wrote:
Hi Scott,
Not sure why if I only use a checkbox (or CenteredCheckBox) as the
item renderer, a checkbox also appears on the header of that column.
Have you seen this problem before?? Thanks.
Ban
--- In [email protected]
<mailto:flexcoders%40yahoogroups.com>, Scott Melby <[EMAIL PROTECTED]> wrote:
>
> Should have mentioned a couple of quick cheats in case you have not
> thought of them... if you use Alex's centered image renderer then you
> could probably do either of the following very easily
>
> 1) Put the label in the column next to the image
> 2) Just show the image and set the data tip for the column to be the
> label text.
>
> hth
> Scott
>
> Scott Melby
> Founder, Fast Lane Software LLC
> http://www.fastlanesw.com <http://www.fastlanesw.com>
>
>
>
> Scott Melby wrote:
> > Check out CenteredCheckBox on Alex's blog (assuming you want it
> > centered, otherwise just use CheckBox). I think Alex's blog also has
> > something for a centered image which should be easily adaptable to
add
> > the text next to it (if it doesn't already support it). You can
> > contact me off list if you want help with the image one.
> >
> > Scott
> > Scott Melby
> > Founder, Fast Lane Software LLC
> > http://www.fastlanesw.com <http://www.fastlanesw.com>
> >
> >
> > letterpigeon wrote:
> >>
> >> Hi Scott and Alex,
> >>
> >> Thanks for all your help. I adopted Alex's example of the
> >> backgroundColorRenderer and it worked really well. So now I'm using
> >> this lightweight for most of the columns in my datagrid except 2,
> >> which are both hbox'es. One to display a checkbox, and another one to
> >> display an image along side with the text. What components/classes do
> >> you think should be used to further improve performance? Thanks.
> >>
> >> Ban
> >>
> >> --- In [email protected]
<mailto:flexcoders%40yahoogroups.com>
> >> <mailto:flexcoders%40yahoogroups.com>, Scott Melby <smelby@> wrote:
> >> >
> >> > Ban -
> >> >
> >> > I don't think TextInput is nearly as lightweight as you might
think.
> >> Do
> >> > you really need them all to be editable at all times? Typically I
> >> use a
> >> > lightweight itemrenderer derived from UIComponent etc. and use a
> >> > separate itemEditor (TextInput, ComboBox, DateField), etc. when the
> >> user
> >> > clicks on a particular data value (row/column).
> >> >
> >> > hth
> >> > Scott
> >> >
> >> > Scott Melby
> >> > Founder, Fast Lane Software LLC
> >> > http://www.fastlanesw.com <http://www.fastlanesw.com>
<http://www.fastlanesw.com <http://www.fastlanesw.com>>
> >> >
> >> >
> >> >
> >> > letterpigeon wrote:
> >> > >
> >> > > Hi Scott,
> >> > >
> >> > > Thanks for your post. But I'm on flex 2 now so the
> >> > > AdvancedDataGridItemRenderer is not available to me. Also, in
terms
> >> > > of keeping the item renderer as light weight as possible, my item
> >> > > renderer is just a TextInput and I change its background color by
> >> > > calling this.styleName = "ErrorCell" where "ErrorCell" is
defined in
> >> > > my stylesheet. But even if I comment all this out, & have my item
> >> > > renderer just to renderer the text, I'm still seeing a
considerable
> >> > > performance hit just by using custom item renderers on all the
> >> columns
> >> > > of my datagrid. Is this a limitation in flex that we must
trade off
> >> > > performance for using custom renderers heavily?? Thanks.
> >> > >
> >> > > Ban
> >> > >
> >> > > --- In [email protected]
<mailto:flexcoders%40yahoogroups.com>
> >> <mailto:flexcoders%40yahoogroups.com>
> >> > > <mailto:flexcoders%40yahoogroups.com>, Scott Melby <smelby@>
wrote:
> >> > > >
> >> > > > Check out this post <http://blog.fastlanesw.com/?p=25
<http://blog.fastlanesw.com/?p=25>
> >> <http://blog.fastlanesw.com/?p=25 <http://blog.fastlanesw.com/?p=25>>
> >> > > <http://blog.fastlanesw.com/?p=25
<http://blog.fastlanesw.com/?p=25>
> >> <http://blog.fastlanesw.com/?p=25
<http://blog.fastlanesw.com/?p=25>>>> on my blog
> >> > > where
> >> > > > I discuss and demonstrate performance diffs using various item
> >> > > renderers
> >> > > > in Flex. Source code is available if you run the app and right
> >> click.
> >> > > > Notice how the optimized renderer does not use layout
containers
> >> > > such as
> >> > > > HBox, etc. Instead it extends the AdvancedDataGridItemRenderer
> >> class.
> >> > > > In general you want to make your renderers as light weight as
> >> possible.
> >> > > >
> >> > > > hth
> >> > > > Scott
> >> > > >
> >> > > > Scott Melby
> >> > > > Founder, Fast Lane Software LLC
> >> > > > http://www.fastlanesw.com <http://www.fastlanesw.com>
<http://www.fastlanesw.com <http://www.fastlanesw.com>>
> >> <http://www.fastlanesw.com <http://www.fastlanesw.com>
<http://www.fastlanesw.com <http://www.fastlanesw.com>>>
> >> > > >
> >> > > >
> >> > > >
> >> > > > letterpigeon wrote:
> >> > > > >
> >> > > > > Hi all,
> >> > > > >
> >> > > > > I'm seeing a huge performance degradation while using
custom item
> >> > > > > renderer with a datagrid. My datagrid is using a custom item
> >> renderer
> >> > > > > for all its column. And even if my item renderer does
nothing
> >> more
> >> > > > > than :
> >> > > > >
> >> > > > > public override function data(value:object)
> >> > > > > {
> >> > > > > super.data = value;
> >> > > > > }
> >> > > > >
> >> > > > > I'm still seeing a few more seconds delay compared to not
> >> using custom
> >> > > > > item renderers for a data set of 50 rows or more.
> >> > > > >
> >> > > > > Just wondering if this is a known issue with flex due to
heavy
> >> graphic
> >> > > > > rendering? Any pointers on how to speed things up a
little bit?
> >> > > Thanks.
> >> > > > >
> >> > > > > Ban
> >> > > > >
> >> > > > >
> >> > > >
> >> > >
> >> > >
> >> >
> >>
> >>
>
