Bug 145021 Enhance the agrregate on option in column binding dialog
1. Check if the expression is aggregate expression by data utility class. 2. If yes, the option is ?all? and group name list 3. if not, the option disabled (or set to none?) if the column binding is in detail row. If the column binding is in group row, the option is ?None? and group name list.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
*/
	public static void setInitWidth( Object object )
	{
		int percentAll = 100;
		try
		{
			if ( object instanceof TableHandle )
			{
				TableHandle table = (TableHandle) object;
				table.setWidth( percentAll
						+ DesignChoiceConstants.UNITS_PERCENTAGE );
			}
			else if ( object instanceof GridHandle )
			{
				GridHandle grid = (GridHandle) object;
				grid.setWidth( percentAll
						+ DesignChoiceConstants.UNITS_PERCENTAGE );
			}
			else
				return;
		}
		catch ( SemanticException e )
		{
			ExceptionHandler.handle( e );
		}
	}
	protected static boolean isHandleValid( DesignElementHandle handle )
	{
		return handle.isValid( ) && handle.getSemanticErrors( ).isEmpty( );
	}