Sorry if I am being really dense but I take it you can't just check the "visible" property of the column?
Ben --- In [email protected], "parkerwhirlow" <[EMAIL PROTECTED]> wrote: > > So, I'm finding that this is really a nasty bug, and I haven't found a > good work-around. > > I've tried searching through the DataGrid.columnMap to ensure there's > renderers for my column before setting the width. This works until you > scroll horizontally. The columns that used to be visible, but aren't > anymore still have renderers in columnMap... and as soon as you set > the width on a non-visible column, bam... null reference error. > > I've submitted a bug report on Flex 2.0.1 through the normal feedback > channel. > > Still looking for some kind of work-around if anyone knows of one, I > really need something! > > thanks, > PW > > --- In [email protected], "parkerwhirlow" <parkerwhirlow@> > wrote: > > > > Hi, > > > > I have an issue where I've created a special routine to calculate the > > size of the columns in my DataGrid subclass. > > > > The problem I have is that I have several data grids that interact > > with eachother, and not all columns are visible (or were ever visible). > > > > When I programmatically set the width of the columns, if the columns > > have not been shown (are not in the 'visibleColumns' array) I get a > > null pointer error. See the stack trace below. > > > > Since I can't get to the 'visibleColumns' collection, how can I set > > the 'desired' widths of my columns without running into this error? > > > > Also, looking at the actual code, they tried to check for some timing > > on whether they had calc'd columns. But they don't check if the column > > you're setting the width on is in the 'visibleColumns' list. This > > seems like a relatively simple defect to fix... It should fall into > > that upper if block, and set the width on the column itself, right? > > > > > > thanks, > > Parker Whirlow > > __________________________ > > > > TypeError: Error #1010: A term is undefined and has no properties. > > at > > > mx.controls::DataGrid/http://www.adobe.com/2006/flex/mx/internal::resizeColumn()[C:\dev\flex_201_gmc\sdk\frameworks\mx\controls\DataGrid.as:2462] > > at mx.controls.dataGridClasses::DataGridColumn/set > > > width()[C:\dev\flex_201_gmc\sdk\frameworks\mx\controls\dataGridClasses\DataGridColumn.as:1048] > > at > > > company.visualizations::MyGrid/company.visualizations:MyGrid::setDefaultColumnWidths()[C:\work\Flex\src\company\visualizations\MyGrid.as:1720] > > > > _________________________ > > source at DataGrid:2462 > > > > // there's a window of time before we calc columnsizes > > // that someone can set width in AS > > if (!visibleColumns || visibleColumns.length == 0) > > { > > columns[col].setWidth(w); > > return; > > } > > > > if (w < visibleColumns[col].minWidth) // ERROR IS HERE > > w = visibleColumns[col].minWidth; > > >
