wxWidgets/include/wx/msw/dde.h

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/////////////////////////////////////////////////////////////////////////////
// Name: dde.h
// Purpose: DDE class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DDE_H_
#define _WX_DDE_H_
#ifdef __GNUG__
#pragma interface "dde.h"
#endif
#include "wx/ipcbase.h"
/*
* Mini-DDE implementation
Most transactions involve a topic name and an item name (choose these
as befits your application).
A client can:
- ask the server to execute commands (data) associated with a topic
- request data from server by topic and item
- poke data into the server
- ask the server to start an advice loop on topic/item
- ask the server to stop an advice loop
A server can:
- respond to execute, request, poke and advice start/stop
- send advise data to client
Note that this limits the server in the ways it can send data to the
client, i.e. it can't send unsolicited information.
*
*/
class WXDLLEXPORT wxDDEServer;
class WXDLLEXPORT wxDDEClient;
class WXDLLEXPORT wxDDEConnection: public wxConnectionBase
{
DECLARE_DYNAMIC_CLASS(wxDDEConnection)
public:
wxDDEConnection(char *buffer, int size);
wxDDEConnection(void);
~wxDDEConnection(void);
// Calls that CLIENT can make
virtual bool Execute(wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
virtual bool Execute(const wxString& str) { return Execute(WXSTRINGCAST str, -1, wxIPC_TEXT); }
virtual char *Request(const wxString& item, int *size = NULL, wxIPCFormat format = wxIPC_TEXT);
virtual bool Poke(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
virtual bool StartAdvise(const wxString& item);
virtual bool StopAdvise(const wxString& item);
// Calls that SERVER can make
virtual bool Advise(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
// Calls that both can make
virtual bool Disconnect(void);
// Callbacks to SERVER - override at will
virtual bool OnExecute(const wxString& topic, char *data, int size, wxIPCFormat format) { return FALSE; };
virtual char *OnRequest(const wxString& topic, const wxString& item, int *size, wxIPCFormat format) { return NULL; };
virtual bool OnPoke(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format) { return FALSE; };
virtual bool OnStartAdvise(const wxString& topic, const wxString& item) { return FALSE; };
virtual bool OnStopAdvise(const wxString& topic, const wxString& item) { return FALSE; };
// Callbacks to CLIENT - override at will
virtual bool OnAdvise(const wxString& topic, const wxString& item, char *data, int size, wxIPCFormat format) { return FALSE; };
// Callbacks to BOTH
// Default behaviour is to delete connection and return TRUE
virtual bool OnDisconnect(void);
public:
char* m_bufPtr;
wxString m_topicName;
int m_bufSize;
wxDDEServer* m_server;
wxDDEClient* m_client;
WXHCONV m_hConv;
wxChar* m_sendingData;
int m_dataSize;
wxIPCFormat m_dataType;
};
class WXDLLEXPORT wxDDEServer: public wxServerBase
{
DECLARE_DYNAMIC_CLASS(wxDDEServer)
public:
wxDDEServer(void);
~wxDDEServer(void);
bool Create(const wxString& server_name); // Returns FALSE if can't create server (e.g. port
// number is already in use)
virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
////////////////////////////////////////////////////////////
// Implementation
// Find/delete wxDDEConnection corresponding to the HCONV
wxDDEConnection *FindConnection(WXHCONV conv);
bool DeleteConnection(WXHCONV conv);
inline wxString& GetServiceName(void) const { return (wxString&) m_serviceName; }
inline wxList& GetConnections(void) const { return (wxList&) m_connections; }
protected:
int m_lastError;
wxString m_serviceName;
wxList m_connections;
};
class WXDLLEXPORT wxDDEClient: public wxClientBase
{
DECLARE_DYNAMIC_CLASS(wxDDEClient)
public:
wxDDEClient(void);
~wxDDEClient(void);
bool ValidHost(const wxString& host);
virtual wxConnectionBase *MakeConnection(const wxString& host, const wxString& server, const wxString& topic);
// Call this to make a connection.
// Returns NULL if cannot.
virtual wxConnectionBase *OnMakeConnection(void); // Tailor this to return own connection.
////////////////////////////////////////////////////////////
// Implementation
// Find/delete wxDDEConnection corresponding to the HCONV
wxDDEConnection *FindConnection(WXHCONV conv);
bool DeleteConnection(WXHCONV conv);
inline wxList& GetConnections(void) const { return (wxList&) m_connections; }
protected:
int m_lastError;
wxList m_connections;
};
void WXDLLEXPORT wxDDEInitialize();
void WXDLLEXPORT wxDDECleanUp();
#endif
// _WX_DDE_H_