String ArrayCtrl::AsText(String (*format)(const Value&), bool sel,
                         const char *tab, const char *row,
                         const char *hdrtab, const char *hdrrow) const
{
	String txt;
	if(hdrtab) {
		for(int i = 0; i < GetColumnCount(); i++) {
			if(i)
				txt << hdrtab;
			txt << (*format)(HeaderTab(i).GetText());
		}
		if(hdrrow)
			txt << hdrrow;
	}
	bool next = false;
	for(int r = 0; r < GetCount(); r++)
		if(!sel || IsSel(r)) {
			if(!next)
				txt << row;  // \r\n is just included for the first row
			for(int i = 0; i < GetColumnCount(); i++) {
				if(i)
					txt << tab;
				txt << (*format)(GetConvertedColumn(r, i));
			}
			next = true;
		}
	return txt;
}