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/////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/dde.h
// Purpose: DDE class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DDE_H_
#define _WX_DDE_H_
#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_FWD_BASE wxDDEServer;
class WXDLLIMPEXP_FWD_BASE wxDDEClient;
class WXDLLIMPEXP_BASE wxDDEConnection : public wxConnectionBase
{
public:
wxDDEConnection(void *buffer, size_t size); // use external buffer
wxDDEConnection(); // use internal buffer
virtual ~wxDDEConnection();
// implement base class pure virtual methods
virtual const void *Request(const wxString& item,
size_t *size = NULL,
wxIPCFormat format = wxIPC_TEXT);
virtual bool StartAdvise(const wxString& item);
virtual bool StopAdvise(const wxString& item);
virtual bool Disconnect();
protected:
virtual bool DoExecute(const void *data, size_t size, wxIPCFormat format);
virtual bool DoPoke(const wxString& item, const void *data, size_t size,
wxIPCFormat format);
virtual bool DoAdvise(const wxString& item, const void *data, size_t size,
wxIPCFormat format);
public:
wxString m_topicName;
wxDDEServer* m_server;
wxDDEClient* m_client;
WXHCONV m_hConv;
const void* m_sendingData;
int m_dataSize;
wxIPCFormat m_dataType;
wxDECLARE_NO_COPY_CLASS(wxDDEConnection);
DECLARE_DYNAMIC_CLASS(wxDDEConnection)
};
class WXDLLIMPEXP_BASE wxDDEServer : public wxServerBase
{
public:
wxDDEServer();
bool Create(const wxString& server_name);
virtual ~wxDDEServer();
virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
// Find/delete wxDDEConnection corresponding to the HCONV
wxDDEConnection *FindConnection(WXHCONV conv);
bool DeleteConnection(WXHCONV conv);
wxString& GetServiceName() const { return (wxString&) m_serviceName; }
wxDDEConnectionList& GetConnections() const
{ return (wxDDEConnectionList&) m_connections; }
protected:
int m_lastError;
wxString m_serviceName;
wxDDEConnectionList m_connections;
DECLARE_DYNAMIC_CLASS(wxDDEServer)
};
class WXDLLIMPEXP_BASE wxDDEClient: public wxClientBase
{
public:
wxDDEClient();
virtual ~wxDDEClient();
bool ValidHost(const wxString& host);
// Call this to make a connection. Returns NULL if cannot.
virtual wxConnectionBase *MakeConnection(const wxString& host,
const wxString& server,
const wxString& topic);
// Tailor this to return own connection.
virtual wxConnectionBase *OnMakeConnection();
// Find/delete wxDDEConnection corresponding to the HCONV
wxDDEConnection *FindConnection(WXHCONV conv);
bool DeleteConnection(WXHCONV conv);
wxDDEConnectionList& GetConnections() const
{ return (wxDDEConnectionList&) m_connections; }
protected:
int m_lastError;
wxDDEConnectionList m_connections;
DECLARE_DYNAMIC_CLASS(wxDDEClient)
};
void WXDLLIMPEXP_BASE wxDDEInitialize();
void WXDLLIMPEXP_BASE wxDDECleanUp();
#endif // _WX_DDE_H_
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