wxWidgets/include/wx/msw/dde.h

149 lines
4.5 KiB
C++

/////////////////////////////////////////////////////////////////////////////
// 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_
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#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 WXDLLIMPEXP_BASE wxDDEServer;
class WXDLLIMPEXP_BASE wxDDEClient;
class WXDLLIMPEXP_BASE wxDDEConnection: public wxConnectionBase
{
DECLARE_DYNAMIC_CLASS(wxDDEConnection)
public:
wxDDEConnection(wxChar *buffer, int size); // use external buffer
wxDDEConnection(); // use internal buffer
~wxDDEConnection(void);
// Calls that CLIENT can make
virtual bool Execute(const wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
virtual bool Execute(const wxString& str) { return Execute(str, -1, wxIPC_TEXT); }
virtual wxChar *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);
// Default behaviour is to delete connection and return true
virtual bool OnDisconnect(void);
public:
wxString m_topicName;
wxDDEServer* m_server;
wxDDEClient* m_client;
WXHCONV m_hConv;
wxChar* m_sendingData;
int m_dataSize;
wxIPCFormat m_dataType;
DECLARE_NO_COPY_CLASS(wxDDEConnection)
};
class WXDLLIMPEXP_BASE 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 wxDDEConnectionList& GetConnections(void) const
{
return (wxDDEConnectionList&) m_connections;
}
protected:
int m_lastError;
wxString m_serviceName;
wxDDEConnectionList m_connections;
};
class WXDLLIMPEXP_BASE 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 wxDDEConnectionList& GetConnections(void) const
{
return (wxDDEConnectionList&) m_connections;
}
protected:
int m_lastError;
wxDDEConnectionList m_connections;
};
void WXDLLIMPEXP_BASE wxDDEInitialize();
void WXDLLIMPEXP_BASE wxDDECleanUp();
#endif
// _WX_DDE_H_