def find_row(self, ev_start, ev_end):
        """Highlight event row in table from start and end time.
        
        Parameters
        ----------
        ev_start : float
            start time, in seconds from record start
        ev_end : float
            end time, in seconds from record start
            
        Returns
        -------
        int
            index of event row in idx_annot_list QTableWidget
        """
        all_starts = self.idx_annot_list.property('start')
        all_ends = self.idx_annot_list.property('end')
        
        for i, (start, end) in enumerate(zip(all_starts, all_ends)):
            if start == ev_start and end == ev_end:
                return i
        
        for i, start in enumerate(all_starts):
            if start == ev_start:
                return i
            
        for i, end in enumerate(all_ends):
            if end == ev_end:
                return i
        
        raise ValueError