COM Events

COM Events

• Vincent D. - Nolme Informatique

  This forum is for general C++ compiler and IDE issues. For Win32 programming issues, please post your question in one of the MSDN discussion groups. In particular:

  http://msdn.microsoft.com/newsgroups/default.aspx dg=microsoft.public.win32.programmer.ole&lang=en&cr=US

  
  

• BCras

  Here's the client code that won't compile. Everything else is just like the DispSink example except for the necessary corrections (check attributes box for server and client as it's not really the default). The sample project can be found at :

  ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.VisualStudio.v80.en/dv_vclib/html/6c3d27a6-80d3-4a80-833c-aa8b19487632.htm

  **********************************************

  // MyDispCtl.h : Declaration of the CMyDispCtl

  #pragma once

  #include "resource.h" // main symbols

  #include <atlctl.h>

  #import "progid:MyDispServer.MyDispServ.1" embedded_idl, no_namespace

  #if defined(_WIN32_WCE) && !defined(_CE_DCOM) && !defined(_CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA)

  #error "Single-threaded COM objects are not properly supported on Windows CE platform, such as the Windows Mobile platforms that do not include full DCOM support. Define _CE_ALLOW_SINGLE_THREADED_OBJECTS_IN_MTA to force ATL to support creating single-thread COM object's and allow use of it's single-threaded COM object implementations. The threading model in your rgs file was set to 'Free' as that is the only threading model supported in non DCOM Windows CE platforms."

  #endif

  // IMyDispCtl

  [

  object,

  uuid(787EDBCA-7FA3-4375-9214-A4C3979AA6F0),

  dual,

  helpstring("IMyDispCtl Interface"),

  pointer_default(unique)

  ]

  __interface IMyDispCtl : public IDispatch

  {

  [id(1), helpstring("method Connect")] HRESULT Connect();

  [id(2), helpstring("method Disconnect")] HRESULT Disconnect();

  [id(3), helpstring("method Send")] HRESULT Send(VARIANT data);

  };

  // _IMyDispCtlEvents

  [

  uuid("FDA3A9A2-FD09-458D-A360-8DECD4186B89"),

  dispinterface,

  helpstring("_IMyDispCtlEvents Interface")

  ]

  __interface _IMyDispCtlEvents

  {

  };

  // CMyDispCtl

  [

  coclass,

  control,

  default(IMyDispCtl, _IMyDispCtlEvents),

  threading(single),

  vi_progid("MyDispClient.MyDispCtl"),

  progid("MyDispClient.MyDispCtl.1"),

  version(1.0),

  uuid("8CE77369-8959-4FFE-8E83-DD8F7FC64C7E"),

  helpstring("MyDispCtl Class"),

  event_source(com),

  registration_script("control.rgs"),

  event_receiver(com)

  ]

  class ATL_NO_VTABLE CMyDispCtl :

  public IMyDispCtl,

  public IPersistStreamInitImpl<CMyDispCtl>,

  public IOleControlImpl<CMyDispCtl>,

  public IOleObjectImpl<CMyDispCtl>,

  public IOleInPlaceActiveObjectImpl<CMyDispCtl>,

  public IViewObjectExImpl<CMyDispCtl>,

  public IOleInPlaceObjectWindowlessImpl<CMyDispCtl>,

  #ifndef _WIN32_WCE

  public IDataObjectImpl<CMyDispCtl>,

  #endif

  #ifdef _WIN32_WCE // IObjectSafety is required on Windows CE for the control to be loaded correctly

  public IObjectSafetyImpl<CMyDispCtl, INTERFACESAFE_FOR_UNTRUSTED_CALLER>,

  #endif

  public CComControl<CMyDispCtl>

  {

  public:

  CMyDispCtl()

  {

  m_bConnected = false;

  m_OutText = L"Not connected";

  }

  ~CMyDispCtl()

  {

  Disconnect();

  }

  DECLARE_OLEMISC_STATUS(OLEMISC_RECOMPOSEONRESIZE |

  OLEMISC_CANTLINKINSIDE |

  OLEMISC_INSIDEOUT |

  OLEMISC_ACTIVATEWHENVISIBLE |

  OLEMISC_SETCLIENTSITEFIRST

  )

  BEGIN_PROP_MAP(CMyDispCtl)

  PROP_DATA_ENTRY("_cx", m_sizeExtent.cx, VT_UI4)

  PROP_DATA_ENTRY("_cy", m_sizeExtent.cy, VT_UI4)

  // Example entries

  // PROP_ENTRY("Property Description", dispid, clsid)

  // PROP_PAGE(CLSID_StockColorPage)

  END_PROP_MAP()

  BEGIN_MSG_MAP(CMyDispCtl)

  CHAIN_MSG_MAP(CComControl<CMyDispCtl>)

  DEFAULT_REFLECTION_HANDLER()

  END_MSG_MAP()

  // Handler prototypes:

  // LRESULT MessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);

  // LRESULT CommandHandler(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled);

  // LRESULT NotifyHandler(int idCtrl, LPNMHDR pnmh, BOOL& bHandled);

  __event __interface _IMyDispCtlEvents;

  // IViewObjectEx

  DECLARE_VIEW_STATUS(VIEWSTATUS_SOLIDBKGND | VIEWSTATUS_OPAQUE)

  // IMyDispCtl

  public:

  HRESULT OnDraw(ATL_DRAWINFO& di)

  {

  USES_CONVERSION;

  LPCTSTR text = OLE2CT(m_OutText.bstrVal);

  RECT& rc = *(RECT*)di.prcBounds;

  Rectangle(di.hdcDraw, rc.left, rc.top, rc.right, rc.bottom);

  SetTextAlign(di.hdcDraw, TA_CENTER|TA_BASELINE);

  TextOut(di.hdcDraw,

  (rc.left + rc.right) / 2,

  (rc.top + rc.bottom) / 2,

  text,

  lstrlen(text));

  return S_OK;

  }

  DECLARE_PROTECT_FINAL_CONSTRUCT()

  HRESULT FinalConstruct()

  {

  return S_OK;

  }

  void FinalRelease()

  {

  }

  private:

  // Data

  bool m_bConnected;

  CComPtr<IMyDispServ> m_spIServ;

  CComVariant m_OutText;

  public:

  HRESULT Connect()

  {

  HRESULT hr;

  hr = m_spIServ.CoCreateInstance(__uuidof(CMyDispServ));

  if (SUCCEEDED(hr))

  {

  hr = __hook(&_IMyDispServEvents::Transfer, m_spIServ, &CMyDispCtl::OnTransmit);

  }

  if (hr == S_OK)

  {

  m_bConnected = true;

  m_OutText = L"Connected";

  }

  FireViewChange();

  return(hr);

  }

  HRESULT Disconnect()

  {

  if (m_bConnected)

  {

  HRESULT hr = __unhook(&_IMyDispServEvents::Transfer, m_spIServ, &CMyDispCtl::OnTransmit);

  if (SUCCEEDED(hr))

  {

  m_spIServ.Release();

  m_bConnected = false;

  m_OutText = L"Not connected";

  }

  FireViewChange();

  return(hr);

  }

  return(S_OK);

  }

  HRESULT OnTransmit(VARIANT data)

  {

  if (data.vt == VT_BSTR)

  m_OutText = data;

  FireViewChange();

  return(S_OK);

  }

  HRESULT Send(VARIANT data)

  {

  if (m_bConnected)

  m_spIServ->Send(data);

  return(S_OK);

  }

  };

  
  
  

• Learning WPF

  I just wanted to add, I'm trying to do this in C++ with MVS 2005 Standard Edition. - spd3001
  
  
• COM Events