182     std::ostringstream ss;  in ToString()  local
183     ss << "pos(" << xPos << "," << yPos << ")";  in ToString()
184     return ss.str();  in ToString()
189     std::ostringstream ss;  in ToString()  local
190     ss << "{eventType:" << eventType  in ToString()
193         ss << item << ",";  in ToString()
195     ss << "],keyValue:" << keyValue  in ToString()
199         ss << item << ",";  in ToString()
201     ss << "],direction:" << direction  in ToString()
213         ss << item.ToString() << ",";  in ToString()
215     ss << "}" << std::endl;  in ToString()
216     return ss.str();  in ToString()
221     std::ostringstream ss;  in ToString()  local
222     ss << "{deviceName:" << deviceName  in ToString()
226         ss << item.ToString() << ",";  in ToString()
228     ss << "]" << std::endl;  in ToString()
229     return ss.str();  in ToString()