Description: ------------ Now when extending Spreadsheet_Excel_Writer_Workbook class there is no way to return extended classes for *_Worksheet, *_Format, etc. from ->addWorksheet(), ->addFormat(), etc... I sudgest to add additional parameter for those methods - $className: < function &addWorksheet($name = '') > function &addWorksheet($name = '', $className = '') < function &addFormat($properties = array()) > function &addFormat($properties = array(), $className = '') ... And then reimplement thouse methods to support different classes: < $worksheet = new Spreadsheet_Excel_Writer_Worksheet(... > if (! class_exists($className)) { > $className = 'Spreadsheet_Excel_Writer_Worksheet'; > } > $worksheet = new $className(... > if (! is_a($worksheet, 'Spreadsheet_Excel_Writer_Worksheet')) { > $this->raiseError('Custom class do not extends Spreadsheet_Excel_Writer_Worksheet', 0, PEAR_ERROR_DIE); > } ...and the same for all other classes.

This would help in getting more specialist classes tied to certain rules into place. Instead of using >$className = ''<, I would default it to the original SEW class.