--- In flexcoders@yahoogroups.com, "Glenn Jones" <[EMAIL PROTECTED]>
wrote:
>
> I'm having a problem with red borders drawn around a cell in the
DataGrid.
>
> I have a custom itemRenderer which extends HBox and impements
> IDropInListItenRenderer
>
> In the set data() method, I set errorString based on conditions in
the data.
> The errorString is either set to null or a non-blank string.
> In the same set data() method, I also call the super class
> invalidateProperties and invalidateDisplayList methods.
>
> For reasons, I don't understand teh parent HBox class does not draw
the
> border when the borderColor is set to errorColor. So I modified
> the updateDisplayList() method of my custom renderer to say - if (
> getStyle("borderColor") == getStyle("errorColor") ) then draw a
border
> myself using the errorColor (defaults to red).
>
> So far so good.
>
> But I have two problem symptoms:
>
> 1. If I correct the error in the underlying data, the red border
remains
> around the cell even though I've verified that my code is NOT
drawing
> it, and the "borderColor" style is no longer "red"
>
> 2. If I start scrolling around in the grid, other cells without
errors are
> getting a red border.
>
> I understand that the grid recycles instances of itemRenderers for
> performance reasons, so I suspect that fixing root cause of #1 will
fix #2.
> But I'm at a loss as to what to do about #1.
Probably the simplest way to handle this is when you set data() if
your error string is "" then you call graphics.clear() and
invalidateDisplayList().
HTH;
Amy
