include/wx/msw/dde.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dde.h
   3 // Purpose:     DDE class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DDE_H_
  13 #define _WX_DDE_H_
  14
  15 #ifdef __GNUG__
  16 #pragma interface "dde.h"
  17 #endif
  18
  19 #include "wx/ipcbase.h"
  20
  21 /*
  22  * Mini-DDE implementation
  23
  24    Most transactions involve a topic name and an item name (choose these
  25    as befits your application).
  26
  27    A client can:
  28
  29    - ask the server to execute commands (data) associated with a topic
  30    - request data from server by topic and item
  31    - poke data into the server
  32    - ask the server to start an advice loop on topic/item
  33    - ask the server to stop an advice loop
  34
  35    A server can:
  36
  37    - respond to execute, request, poke and advice start/stop
  38    - send advise data to client
  39
  40    Note that this limits the server in the ways it can send data to the
  41    client, i.e. it can't send unsolicited information.
  42  *
  43  */
  44
  45 class WXDLLEXPORT wxDDEServer;
  46 class WXDLLEXPORT wxDDEClient;
  47
  48 class WXDLLEXPORT wxDDEConnection: public wxConnectionBase
  49 {
  50   DECLARE_DYNAMIC_CLASS(wxDDEConnection)
  51 public:
  52   wxDDEConnection(char *buffer, int size);
  53   wxDDEConnection(void);
  54   ~wxDDEConnection(void);
  55
  56   // Calls that CLIENT can make
  57   virtual bool Execute(const wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  58   virtual char *Request(const wxString& item, int *size = NULL, wxIPCFormat format = wxIPC_TEXT);
  59   virtual bool Poke(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  60   virtual bool StartAdvise(const wxString& item);
  61   virtual bool StopAdvise(const wxString& item);
  62
  63   // Calls that SERVER can make
  64   virtual bool Advise(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  65
  66   // Calls that both can make
  67   virtual bool Disconnect(void);
  68
  69   // Default behaviour is to delete connection and return TRUE
  70   virtual bool OnDisconnect(void);
  71
  72  public:
  73   char*         m_bufPtr;
  74   wxString      m_topicName;
  75   int           m_bufSize;
  76   wxDDEServer*  m_server;
  77   wxDDEClient*  m_client;
  78
  79   WXHCONV       m_hConv;
  80   wxChar*       m_sendingData;
  81   int           m_dataSize;
  82   wxIPCFormat  m_dataType;
  83 };
  84
  85 class WXDLLEXPORT wxDDEServer: public wxServerBase
  86 {
  87   DECLARE_DYNAMIC_CLASS(wxDDEServer)
  88  public:
  89
  90   wxDDEServer(void);
  91   ~wxDDEServer(void);
  92   bool Create(const wxString& server_name); // Returns FALSE if can't create server (e.g. port
  93                                   // number is already in use)
  94   virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
  95
  96   ////////////////////////////////////////////////////////////
  97   // Implementation
  98
  99   // Find/delete wxDDEConnection corresponding to the HCONV
 100   wxDDEConnection *FindConnection(WXHCONV conv);
 101   bool DeleteConnection(WXHCONV conv);
 102   inline wxString& GetServiceName(void) const { return (wxString&) m_serviceName; }
 103   inline wxList& GetConnections(void) const { return (wxList&) m_connections; }
 104
 105  protected:
 106   int       m_lastError;
 107   wxString  m_serviceName;
 108   wxList    m_connections;
 109 };
 110
 111 class WXDLLEXPORT wxDDEClient: public wxClientBase
 112 {
 113   DECLARE_DYNAMIC_CLASS(wxDDEClient)
 114  public:
 115   wxDDEClient(void);
 116   ~wxDDEClient(void);
 117   bool ValidHost(const wxString& host);
 118   virtual wxConnectionBase *MakeConnection(const wxString& host, const wxString& server, const wxString& topic);
 119                                                 // Call this to make a connection.
 120                                                 // Returns NULL if cannot.
 121   virtual wxConnectionBase *OnMakeConnection(void); // Tailor this to return own connection.
 122
 123   ////////////////////////////////////////////////////////////
 124   // Implementation
 125
 126   // Find/delete wxDDEConnection corresponding to the HCONV
 127   wxDDEConnection *FindConnection(WXHCONV conv);
 128   bool DeleteConnection(WXHCONV conv);
 129   inline wxList& GetConnections(void) const { return (wxList&) m_connections; }
 130
 131  protected:
 132   int       m_lastError;
 133   wxList    m_connections;
 134 };
 135
 136 void WXDLLEXPORT wxDDEInitialize();
 137 void WXDLLEXPORT wxDDECleanUp();
 138
 139 #endif
 140     // _WX_DDE_H_