Flex 4, AdvancedDataGrid: initial column width - apache-flex

Question

I got a problem with the widths of the advanceddatagrid-columns.
First of all, my layout is a HDividedBox, on the left there is the navigation, on the right there is a module, containing the advanceddatagrid.
left Side: navigation
right side: module (e.g. advanceddatagrid)
Most of the columns got a fixed width, some a minWidth. Now, initially the widths of the columns are correct.
So the problem is, whenever I load a new module and later reload the advanceddatagrid, the initial width of the columns is way different, although I change nothing in the process of loading the module. Neither the fixed widths nor the minWidths are initially correct.
I recently saw there is a solution for wrong widths of colums, it looks like that:
var oldPolicy:String = advanceddatagrid.myScrollPolicy;
advanceddatagrid.myScrollPolicy = ScrollPolicy.ON;
for(var i:int = 0; i < advanceddatagrid.columns.length; i++) {
var column:AdvancedDataGridColumn = advanceddatagrid.columns[i] as AdvancedDataGridColumn;
advanceddatagrid.column.width = column.width;
}
advanceddatagrid.validateNow();
advanceddatagrid.myScrollPolicy = oldPolicy;
advanceddatagrid.validateNow();
On the whole this is just a temporary change of the ScrollPolicy, re-setting the column-widths and then changing back. But still, it doenst work.
Does anyone have a clue?

Answer 1

Some relevant references that might help (the first one worked for me):
http://userflex.wordpress.com/2011/04/14/force-resize-datagrid/
http://forums.adobe.com/message/4285461
To summarize the first post (credit goes to Nick Schneble):
public function resizeColumns () : void
{
grid.validateNow ();
// forces the columns to size themselves properly
for each (var column : AdvancedDataGridColumn in grid.columns)
{
column.width = column.width;
}
}
It may seem a bit ridiculous, but if you execute this method whenever the underlying data in your data grid changes, you’ll have beautifully laid out columns.