Hi everybody !

I have a strange problem this morning. I'm tryng to use a QTimer object in a class but it does not work.

I have a class which has a QTimer objet as a member. this class has also a slot to process each timer timeout.

I call a function to start the timer and check the return value of the function ... every thing is ok because the returned value is different from zero ... cool. I also check that there is no problem with the SIGNAL SLOT conection ... here again no problem. In fact there is a problem because the SLOT to process timer timeout is never called, why ?

My header file class is :
Qt Code: 
  1. #include <qobject.h>
  2. #include "HmiStateA.h"
  3. #include "HmiState.h"
  4. #include "Hmi.h"
  5. #include <qtimer.h>
  6.  
  7. class CHmiStateB : public QObject, public CAvreHmiStateA
  8. {
  9. 	Q_OBJECT
  10.  
  11. public:
  12. 	static CHmiState* GetInstance();
  13. 	virtual ~CHmiStateB();
  14.  
  15. protected:
  16. 	CHmiStateB();
  17. 	static CHmiStateB* m_Instance;
  18.  
  19. public:
  20. 	virtual void ShowHmi(CHmi*);
  21. 	virtual void HideHmi(CHmi*);
  22. 	virtual void ResetHmi(CHmi*);
  23. 	virtual void ValidateHmiItem(CHmi*);
  24. 	virtual void CancelHmiItem(CHmi*);
  25.  
  26. protected slots:
  27. 	void ProcessTimerTimeout();
  28. protected:
  29. 	QTimer* pTimer;
  30. };
  31.  
  32. #endif
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My implementation file class is :
Qt Code: 
  1. #include "HmiStateB.h"
  2. #include "HmiStateA.h"
  3. #include <qapplication.h>
  4.  
  5. CHmiStateB* CHmiStateB::m_Instance = 0;
  6.  
  7. CHmiStateB::CHmiStateB():
  9. CHmiStateA(),
  10. pTimer(0)
  11. {
  12. if( !pTimer )
  13. {
  14. 	pTimer = new QTimer;
  15. 	Q_ASSERT( pTimer );
  16. 	connect(pTimer, SIGNAL(timeout()), this, SLOT(ProcessTimerTimeout()));
  17. }
  18. }
  19.  
  20. CHmiStateB::~CHmiStateB()
  21. {
  22. if( pTimer )
  23. {
  24. 	if( pTimer->isActive() )
  25. 		pTimer->stop();
  26. 	delete pTimer;
  27. 	pTimer = 0;
  28. }
  29.  
  30. }
  31.  
  32. CHmiState* CHmiStateB::GetInstance()
  33. {
  34. 	if( !m_Instance )
  35. 		m_Instance = new CHmiStateB;
  36.  
  37. 	return m_Instance;
  38. }
  39.  
  40. void CHmiStateB::ShowHmi(CHmi* hmi)
  41. {
  42. 	if( !pTimer->start(4000, TRUE) )
  43. 		qDebug("Failed to start timer");
  44. }
  45.  
  46. void CHmiStateB::HideHmi(CHmi* hmi)
  47. {
  48. 	if( pTimer->isActive() )
  49. 		pTimer->stop();
  50. }
  51.  
  52. void CHmiStateB::ResetHmi(CHmi* hmi)
  53. {
  54. }
  55.  
  56.  
  57. void CHmiStateB::ValidateHmiItem(CHmi* hmi)
  58. {
  59. }
  60.  
  61. void CHmiStateB::CancelHmiItem(CHmi* hmi)
  62. {
  63. }
  64.  
  65. void CHmiStateB::ProcessTimerTimeout()
  66. {
  67. 	qDebug("Timer Timeout");
  68. }
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So if someone could tell what is wrong ?

Thanks in advance