When OnTimer event will be fired ?

Question

Can any one tell me when OnTimer event will be fired ? (new to VC++) (sorry for bad formattibg)

enter code here

// iSCSIDlg.h : header file

define WM_RECVDATA WM_USER+1

class CISCSIDlg : public CDialog { public: bool m_testrand; bool m_ack; bool m_testProc; BOOL m_isConnect; BOOL InitSocket(); CISCSIDlg(CWnd* pParent = NULL); static DWORD WINAPI RecvProc(LPVOID lpParameter);
static DWORD WINAPI send_test(LPVOID lpParameter);

protected:
virtual void DoDataExchange(CDataExchange* pDX);

protected: afx_msg void OnTimer(UINT nIDEvent); DECLARE_MESSAGE_MAP()

};

class CAboutDlg : public CDialog { public: CAboutDlg(); enum { IDD = IDD_ABOUTBOX }; protected: virtual void DoDataExchange(CDataExchange* pDX);

protected: DECLARE_MESSAGE_MAP() };

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { }

void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); }

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)

END_MESSAGE_MAP()

CISCSIDlg::CISCSIDlg(CWnd* pParent) : CDialog(CISCSIDlg::IDD, pParent) { m_srvPort = 0; m_cmd = -1; m_param1 = 0; m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); }

void CISCSIDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); DDX_Control(pDX, IDC_BTN_CONNECT, m_btnConnect); DDX_Control(pDX, IDC_BTN_SEND, m_btnSend); DDX_Text(pDX, IDC_EDIT_PORT, m_srvPort); DDX_Radio(pDX, IDC_RADIO0, m_cmd); DDX_Text(pDX, IDC_EDIT1, m_param1); }

BEGIN_MESSAGE_MAP(CISCSIDlg, CDialog) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BTN_CONNECT, OnBtnConnect) ON_BN_CLICKED(IDC_BTN_SEND, OnBtnSend) ON_BN_CLICKED(IDC_RADIO0, OnRadio) ON_WM_TIMER() ON_MESSAGE(WM_RECVDATA,OnRecvData) END_MESSAGE_MAP()

BOOL CISCSIDlg::OnInitDialog() { CDialog::OnInitDialog(); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } UpdateData(FALSE); GetDlgItem(IDC_EDIT1)->ShowWindow(SW_HIDE); GetDlgItem(IDC_EDIT2)->ShowWindow(SW_HIDE); return TRUE; }

void CISCSIDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } }

void CISCSIDlg::OnPaint() {

}

HCURSOR CISCSIDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; }

DWORD WINAPI CISCSIDlg::RecvProc(LPVOID lpParameter) { SOCKET sock=((RECVPARAM*)lpParameter)->sock; HWND hwnd=((RECVPARAM*)lpParameter)->hwnd; delete lpParameter;

unsigned char recvBuf[1500];
unsigned char tempBuf[1500];
int retval;
while(TRUE)
{
    memset(recvBuf,0,sizeof(recvBuf));
    retval=recv(sock,(char *)recvBuf,1500,0);
    memcpy(tempBuf,recvBuf,1500);
    ::PostMessage(hwnd,WM_RECVDATA,0,(LPARAM)tempBuf);
}
return 0;

}

void CISCSIDlg::OnRecvData(WPARAM wParam,LPARAM lParam) {

CTime time=CTime::GetCurrentTime();

if(msg[12]==0)
{

}
else
{

    send(m_socket,(char*)tmp_buf,32,0);
}

if(msg[12]==0 && m_testProc)
{

    SetDlgItemText(IDC_ERR,temp);
}
else
    if(msg[12]==0 && m_testrand)
    {

    }
    else
        if(m_testProc || m_testrand)
            m_ack=true;

}

void CISCSIDlg::OnBtnConnect() {

}

void CISCSIDlg::OnBtnSend() {

send(m_socket,(char*)msg_header,cmdSize+16,0);//kh 2

}

void CISCSIDlg::OnTimer(UINT nIDEvent) {

if(nIDEvent==1)
{
    timeout--;
    if(timeout<0)
    {
        KillTimer(1);
        flag_test_ready=0;
        AfxMessageBox("xxx");
    }

}

if(nIDEvent==2)
{
    unsigned char testBuf[100];
    int testSize=16;
    memset(testBuf,0,sizeof(testBuf));

    testBuf[0]=0xa5;


    if(m_testrand  &&  m_isConnect )
    {
        if(m_ack)
        {
            m_ack=false;

            unsigned char msg_header[16+100];



            send(m_socket,(char*)msg_header,16+testSize,0);

            CString toShow,temp;
            CTime time=CTime::GetCurrentTime();

            toShow.Format("rand:%2d:%2d:%2d  cmd(%2x):--",time.GetHour(),time.GetMinute(),time.GetSecond(),testBuf[0]);
            for( i=0;i<testSize+16;i++)
            {
                temp.Format(" %2x",msg_header[i]);  
                toShow+=temp;
                if(i%8==7)
                {
                    ((CListBox*)GetDlgItem(IDC_LIST_MSG))->InsertString(0,toShow);
                    toShow.Empty();
                    toShow.Format("rand:%2d:%2d:%2d  cmd(%2x):--",time.GetHour(),time.GetMinute(),time.GetSecond(),testBuf[0]);
                }
            }
            if(i%8!=0)
                ((CListBox*)GetDlgItem(IDC_LIST_MSG))->InsertString(0,toShow);
        }
    }
}

CDialog::OnTimer(nIDEvent);

}

Answer 1

In the Code uploaded, OnTimer will not be called. In order for OnTimer to be called, an initial call to SetTimer must be made.

UINT_PTR SetTimer(
   UINT_PTR nIDEvent,
   UINT nElapse,
   void (CALLBACK* lpfnTimer) ( HWND, UINT, UINT_PTR, DWORD ) 
);

This call can be made in OnInitDialog():

...
//TODO: Add extra initialization here
//         +---------------- Some unique identifier, to differentiate timers
//         |      +--------- The timeout value,
//         |      |    +---- A callback - NULL in this case because of WM_TIMER
//         |      |    |
//         V      V    V
SetTimer( 9001, 2000, NULL );
...

See the MSDN article for more detail:

http://msdn.microsoft.com/en-us/library/49313fdf(VS.80).aspx