QString GeneralWindow::invertMessage(QString &text)
{
    QString tableR=tr("qwertyuiop[]asdfghjkl;'zxcvbnm,./QWERTYUIOP{}ASDFGHJKL:\"ZXCVBNM<>?");
    QString tableE="qwertyuiop[]asdfghjkl;'zxcvbnm,./QWERTYUIOP{}ASDFGHJKL:\"ZXCVBNM<>?";
    QString txt = text;
    for(int i = 0; i < txt.length(); i++)
    {
        if(txt.at(i) <= QChar('z'))
        {
            int j = 0; bool b=true;
        while((j < tableE.length()) && b)
        {
            if(txt[i] == tableE[j])
            {
               b = false;
               txt[i] = tableR[j];
            }
            j++;
         }
          }else{
         int j = 0; bool b = true;
         while((j < tableR.length()) && b)
         {
            if(txt[i] == tableR[j])
            {
               b = false;
               txt[i] = tableE[j];
            }
            j++;
         }
          }
       }
       return txt;
}