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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	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	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 bool Execute(const wxString& str) { return Execute(str, -1, wxIPC_TEXT); }
	59	virtual wxChar Request(const wxString& item, int size = NULL, wxIPCFormat format = wxIPC_TEXT);
	60	virtual bool Poke(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
	61	virtual bool StartAdvise(const wxString& item);
	62	virtual bool StopAdvise(const wxString& item);
	63
	64	// Calls that SERVER can make
	65	virtual bool Advise(const wxString& item, wxChar *data, int size = -1, wxIPCFormat format = wxIPC_TEXT);
	66
	67	// Calls that both can make
	68	virtual bool Disconnect(void);
	69
	70	// Default behaviour is to delete connection and return true
	71	virtual bool OnDisconnect(void);
	72
	73	public:
	74	wxString m_topicName;
	75	wxDDEServer* m_server;
	76	wxDDEClient* m_client;
	77
	78	WXHCONV m_hConv;
	79	wxChar* m_sendingData;
	80	int m_dataSize;
	81	wxIPCFormat m_dataType;
	82
	83	DECLARE_NO_COPY_CLASS(wxDDEConnection)
	84	};
	85
	86	class WXDLLIMPEXP_BASE wxDDEServer: public wxServerBase
	87	{
	88	DECLARE_DYNAMIC_CLASS(wxDDEServer)
	89	public:
	90
	91	wxDDEServer(void);
	92	~wxDDEServer(void);
	93	bool Create(const wxString& server_name); // Returns false if can't create server (e.g. port
	94	// number is already in use)
	95	virtual wxConnectionBase *OnAcceptConnection(const wxString& topic);
	96
	97	////////////////////////////////////////////////////////////
	98	// Implementation
	99
	100	// Find/delete wxDDEConnection corresponding to the HCONV
	101	wxDDEConnection *FindConnection(WXHCONV conv);
	102	bool DeleteConnection(WXHCONV conv);
	103	inline wxString& GetServiceName(void) const { return (wxString&) m_serviceName; }
	104	inline wxDDEConnectionList& GetConnections(void) const
	105	{
	106	return (wxDDEConnectionList&) m_connections;
	107	}
	108
	109	protected:
	110	int m_lastError;
	111	wxString m_serviceName;
	112	wxDDEConnectionList m_connections;
	113	};
	114
	115	class WXDLLIMPEXP_BASE wxDDEClient: public wxClientBase
	116	{
	117	DECLARE_DYNAMIC_CLASS(wxDDEClient)
	118	public:
	119	wxDDEClient(void);
	120	~wxDDEClient(void);
	121	bool ValidHost(const wxString& host);
	122	virtual wxConnectionBase *MakeConnection(const wxString& host, const wxString& server, const wxString& topic);
	123	// Call this to make a connection.
	124	// Returns NULL if cannot.
	125	virtual wxConnectionBase *OnMakeConnection(void); // Tailor this to return own connection.
	126
	127	////////////////////////////////////////////////////////////
	128	// Implementation
	129
	130	// Find/delete wxDDEConnection corresponding to the HCONV
	131	wxDDEConnection *FindConnection(WXHCONV conv);
	132	bool DeleteConnection(WXHCONV conv);
	133
	134	inline wxDDEConnectionList& GetConnections(void) const
	135	{
	136	return (wxDDEConnectionList&) m_connections;
	137	}
	138
	139	protected:
	140	int m_lastError;
	141	wxDDEConnectionList m_connections;
	142	};
	143
	144	void WXDLLIMPEXP_BASE wxDDEInitialize();
	145	void WXDLLIMPEXP_BASE wxDDECleanUp();
	146
	147	#endif
	148	// _WX_DDE_H_