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Commit	Line	Data
	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 WXDLLIMPEXP_BASE wxDDEServer;
	46	class WXDLLIMPEXP_BASE wxDDEClient;
	47
	48	class WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE wxDDEInitialize();
	144	void WXDLLIMPEXP_BASE wxDDECleanUp();
	145
	146	#endif
	147	// _WX_DDE_H_