readstatus.cpp

介绍控制器运动的例子

// ReadStatus.cpp: implementation of the ReadStatus class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MFCStatus.h"
#include "ReadStatus.h"
#include "MFCStatusDlg.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

// ATL defined structure for defining the parameter data of the callback.  
// In this case there are two prameters.
_ATL_FUNC_INFO ReadAlertInfo = {CC_STDCALL, VT_EMPTY, 2, {VT_I4,VT_I4}};

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

ReadStatus::ReadStatus(void *winPtr)
{
  // We could have passed in just the specific data needed, to make this
  // more generic, but passing in the window pointer makes it look more
  // like the MFCStatusMT application it is a copy of.
  CMFCStatusDlg *workIt = (CMFCStatusDlg *) winPtr;
 	m_hDialog = workIt->m_hWnd;                       // window handle for messages

  m_stat.CreateInstance(BOXBRIDGELib::CLSID_Status);// start up COM Interface
  HRESULT hr = DispEventAdvise((IUnknown*)m_stat);

  m_stat->PutnStatusWaitRate(7);                     // Minimum time between status events
  m_stat->PutnBPS(workIt->m_BPS);                   // Set BPS
  m_stat->PutnPort(workIt->m_Port);                 // Set Port
  m_stat->PutbstrIP(workIt->m_IP.AllocSysString()); // Set IP Address
  m_stat->PutnBus(workIt->m_BusType?1:0);           // Set Bus, checked(true) is ISA, else PCI
  m_stat->Connect(workIt->m_Transport,workIt->m_CardNbr);// Connect to Transport
  if(!m_stat->GetisOffline()){
    m_Msgid = m_stat->AddACRCustom(_T("P6916"));    // Start the status queue - p6916 is the ACR global clock
  }
}

ReadStatus::~ReadStatus()
{
  if(m_stat){
    m_stat->DelStatus(m_Msgid);
    DispEventUnadvise((IUnknown*)m_stat);
    m_stat->Disconnect();
    m_stat = NULL;         // Setting smart pointers to NULL is *VERY IMPORTANT*
  }
}

void __stdcall ReadStatus::ReadAlert(long msg, long err)
{
  // Init SafeArray Stuff
  SAFEARRAY* pSA;
  long lBound = 0; 
  CComVariant vItem;  // The CComVariant is found in the atlbase.h include file
  CComVariant status; // it will clean up SAFEARRAY when it goes out of scope.

  if(m_Msgid == msg){  // only process desired event
    status = m_stat->GetStatus(msg);
    if(status.vt & VT_ARRAY){ 
      pSA = status.parray;
      SafeArrayGetElement(pSA, &lBound, &vItem);
      if(vItem.vt!=VT_EMPTY)
        // Either Send or Post message can be used.
        //::SendMessage(workIt->m_hDialog,WMU_UpdateClock,0,vItem.lVal);
        ::PostMessage(m_hDialog,WMU_UpdateClock,0,vItem.lVal);
    }
  }
}