Wait for Renderers to Display

Question

I'm testing a component with an editable DataGrid with custom item renderers. I wanted to use a sequence to simulate the user modifying a cell in the datagrid, but to be able to do that, I have to first make sure all the visible renders have been added and drawn. I've tried waiting for creationComplete and show but both of those events can potentially be dispatched before the renderers are added. Is there any event I can listen for in my test that will guarantee all the renderers have been drawn and displayed for the visible section of the datagrid?

Answer 1

Yes, but if you combine that with other methods you can get where you need to go.
var renderer:IListItemRenderer = dataGrid.itemToItemRenderer ( dataObjectToFind );
if(renderer)
     var rowIndex:int = dataGrid.itemRendererToIndex( renderer );
     var colIndex:int = columnDataFieldToIndex( dataFieldToFind );
     // index null checks..
     dataGrid.editedItemPosition = {columnIndex: colIndex, rowIndex: rowIndex };
Here is a example method for finding your column index for a datafield.
public function columnDataFieldToIndex ( dataField:String ) : int
     var colIndex : int;
     for each (var column:AdvancedDataGridColumn in columns)
          if(column.dataField == dataField)
               colIndex = columns.indexOf( column );
               break;
     return colIndex;
Hope that helps.