This is my header:
Qt Code: 
  1. #ifndef ALARMH_H
  2. #define ALARMH_H
  3.  
  4. class Alarm : public QObject
  5. {
  6.     Q_OBJECT
  7.  
  8. public:
  9.     Alarm(QString file)
  10. {
  11. // code here
  12. }
  13.     int parseXML(QDomDocument doc, QString file)
  14. {
  15. // code here
  16. }
  17.     void checkAlarm()
  18.     {
  19.         QTimer *timer = new QTimer(this);
  20.         connect(timer, SIGNAL(timeout()), this, SLOT(checkTime()));
  21.         qDebug() << timer->timerId();
  22.         timer->start(100);
  23.     }
  24. private:
  25.     QString alarmName;
  26.     QTime alarmTime;
  27.     QDate alarmDate;
  28.     QString alarmSound;
  29.     QString alarmMessage;
  30.     QString alarmApp;
  31.     QString alarmAppArg;
  32.  
  33. signals:
  34.     void soundAlarm();
  35.  
  36. private slots:
  37.     void checkTime()
  38.     {
  39.         qDebug() << "check ....";
  40.     }
  41.  
  42.  
  43. };
  44. #endif // ALARMH_H
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I use it in .cpp:
Qt Code: 
  1. Alarm a(filename);
  2. a.checkAlarm();
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But the timer somehow does not call the SLOT once it's timed out. Probably my mistake, but where?