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(wxChar *buffer, int size); // use external buffer
  53   wxDDEConnection(); // use internal buffer
  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 wxChar *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   wxString      m_topicName;
  74   wxDDEServer*  m_server;
  75   wxDDEClient*  m_client;
  76
  77   WXHCONV       m_hConv;
  78   wxChar*       m_sendingData;
  79   int           m_dataSize;
  80   wxIPCFormat  m_dataType;
  81
  82     DECLARE_NO_COPY_CLASS(wxDDEConnection)
  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 wxDDEConnectionList& GetConnections(void) const
 104     {
 105         return (wxDDEConnectionList&) m_connections;
 106     }
 107
 108 protected:
 109     int       m_lastError;
 110     wxString  m_serviceName;
 111     wxDDEConnectionList m_connections;
 112 };
 113
 114 class WXDLLEXPORT wxDDEClient: public wxClientBase
 115 {
 116   DECLARE_DYNAMIC_CLASS(wxDDEClient)
 117  public:
 118   wxDDEClient(void);
 119   ~wxDDEClient(void);
 120   bool ValidHost(const wxString& host);
 121   virtual wxConnectionBase *MakeConnection(const wxString& host, const wxString& server, const wxString& topic);
 122                                                 // Call this to make a connection.
 123                                                 // Returns NULL if cannot.
 124   virtual wxConnectionBase *OnMakeConnection(void); // Tailor this to return own connection.
 125
 126   ////////////////////////////////////////////////////////////
 127   // Implementation
 128
 129   // Find/delete wxDDEConnection corresponding to the HCONV
 130   wxDDEConnection *FindConnection(WXHCONV conv);
 131   bool DeleteConnection(WXHCONV conv);
 132
 133     inline wxDDEConnectionList& GetConnections(void) const
 134     {
 135         return (wxDDEConnectionList&) m_connections;
 136     }
 137
 138 protected:
 139     int       m_lastError;
 140     wxDDEConnectionList m_connections;
 141 };
 142
 143 void WXDLLEXPORT wxDDEInitialize();
 144 void WXDLLEXPORT wxDDECleanUp();
 145
 146 #endif
 147     // _WX_DDE_H_