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 #include "wx/ipcbase.h"
  16
  17 /*
  18  * Mini-DDE implementation
  19
  20    Most transactions involve a topic name and an item name (choose these
  21    as befits your application).
  22
  23    A client can:
  24
  25    - ask the server to execute commands (data) associated with a topic
  26    - request data from server by topic and item
  27    - poke data into the server
  28    - ask the server to start an advice loop on topic/item
  29    - ask the server to stop an advice loop
  30
  31    A server can:
  32
  33    - respond to execute, request, poke and advice start/stop
  34    - send advise data to client
  35
  36    Note that this limits the server in the ways it can send data to the
  37    client, i.e. it can't send unsolicited information.
  38  *
  39  */
  40
  41 class WXDLLIMPEXP_BASE wxDDEServer;
  42 class WXDLLIMPEXP_BASE wxDDEClient;
  43
  44 class WXDLLIMPEXP_BASE wxDDEConnection: public wxConnectionBase
  45 {
  46   DECLARE_DYNAMIC_CLASS(wxDDEConnection)
  47 public:
  48   wxDDEConnection(wxChar *buffer, int size); // use external buffer
  49   wxDDEConnection(); // use internal buffer
  50   virtual ~wxDDEConnection(void);
  51
  52   // Calls that CLIENT can make
  53   virtual bool Execute(const wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  54   virtual bool Execute(const wxString& str) { return Execute(str, -1, wxIPC_TEXT); }
  55   virtual wxChar *Request(const wxString& item, int *size = NULL, wxIPCFormat format = wxIPC_TEXT);
  56   virtual bool Poke(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  57   virtual bool StartAdvise(const wxString& item);
  58   virtual bool StopAdvise(const wxString& item);
  59
  60   // Calls that SERVER can make
  61   virtual bool Advise(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
  62
  63   // Calls that both can make
  64   virtual bool Disconnect(void);
  65
  66   // Default behaviour is to delete connection and return true
  67   virtual bool OnDisconnect(void);
  68
  69  public:
  70   wxString      m_topicName;
  71   wxDDEServer*  m_server;
  72   wxDDEClient*  m_client;
  73
  74   WXHCONV       m_hConv;
  75   wxChar*       m_sendingData;
  76   int           m_dataSize;
  77   wxIPCFormat  m_dataType;
  78
  79     DECLARE_NO_COPY_CLASS(wxDDEConnection)
  80 };
  81
  82 class WXDLLIMPEXP_BASE wxDDEServer: public wxServerBase
  83 {
  84   DECLARE_DYNAMIC_CLASS(wxDDEServer)
  85  public:
  86
  87   wxDDEServer(void);
  88   virtual ~wxDDEServer(void);
  89   bool Create(const wxString& server_name); // Returns false if can't create server (e.g. port
  90                                   // number is already in use)
  91   virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
  92
  93   ////////////////////////////////////////////////////////////
  94   // Implementation
  95
  96   // Find/delete wxDDEConnection corresponding to the HCONV
  97   wxDDEConnection *FindConnection(WXHCONV conv);
  98   bool DeleteConnection(WXHCONV conv);
  99   inline wxString& GetServiceName(void) const { return (wxString&) m_serviceName; }
 100     inline wxDDEConnectionList& GetConnections(void) const
 101     {
 102         return (wxDDEConnectionList&) m_connections;
 103     }
 104
 105 protected:
 106     int       m_lastError;
 107     wxString  m_serviceName;
 108     wxDDEConnectionList m_connections;
 109 };
 110
 111 class WXDLLIMPEXP_BASE wxDDEClient: public wxClientBase
 112 {
 113   DECLARE_DYNAMIC_CLASS(wxDDEClient)
 114  public:
 115   wxDDEClient(void);
 116   virtual ~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
 130     inline wxDDEConnectionList& GetConnections(void) const
 131     {
 132         return (wxDDEConnectionList&) m_connections;
 133     }
 134
 135 protected:
 136     int       m_lastError;
 137     wxDDEConnectionList m_connections;
 138 };
 139
 140 void WXDLLIMPEXP_BASE wxDDEInitialize();
 141 void WXDLLIMPEXP_BASE wxDDECleanUp();
 142
 143 #endif
 144     // _WX_DDE_H_