QTextEdit

void MainWidget2::slotShowMsg(MsgType type,QString msg)
{
     logSize_++;
     msg=QDateTime::currentDateTime ().toString ("[yyyy/MM/dd hh:mm:ss zzz] ")+msg;
     if(type==L_ERROR)
     {
       ui->teMsg->append("<font color=\"#FF0000\">"+msg+"</font>");
     }
     else
     {
         ui->teMsg->append(msg); 
     }
    
     if(logSize_>LOG_MAX_SIZE)
     {
         ui->teMsg->clear();
         logSize_=0;
     }
}