20cb47c1c4
This is a more hackish but more compatible solution to the problem of
data sent using wxIPC_UTF8TEXT format being simply lost when using DDE
for IPC classes. We must use CF_TEXT for the DDE to pass our data, but
we can try to decode it as UTF-8 in the client and assume it was sent in
this format if it worked. This obviously suffers from false positives as
any ASCII string will still be assumed to be UTF-8, but there shouldn't
be any real harm coming from this.
This change also makes sending data in wxIPC_UTF{16,32}TEXT formats work
as well by converting it to UTF-8.
Update the sample to call Advise() with both wxIPC_UTF{8,16}TEXT formats
and remove the now unnecessary wxDDEConnection::m_dataType member.
Closes #17900.
137 lines
4.1 KiB
C++
137 lines
4.1 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/msw/dde.h
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// Purpose: DDE class
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// Author: Julian Smart
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// Modified by:
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// Created: 01/02/97
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_DDE_H_
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#define _WX_DDE_H_
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#include "wx/ipcbase.h"
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/*
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* Mini-DDE implementation
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Most transactions involve a topic name and an item name (choose these
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as befits your application).
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A client can:
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- ask the server to execute commands (data) associated with a topic
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- request data from server by topic and item
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- poke data into the server
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- ask the server to start an advice loop on topic/item
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- ask the server to stop an advice loop
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A server can:
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- respond to execute, request, poke and advice start/stop
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- send advise data to client
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Note that this limits the server in the ways it can send data to the
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client, i.e. it can't send unsolicited information.
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*
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*/
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class WXDLLIMPEXP_FWD_BASE wxDDEServer;
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class WXDLLIMPEXP_FWD_BASE wxDDEClient;
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class WXDLLIMPEXP_BASE wxDDEConnection : public wxConnectionBase
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{
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public:
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wxDDEConnection(void *buffer, size_t size); // use external buffer
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wxDDEConnection(); // use internal buffer
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virtual ~wxDDEConnection();
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// implement base class pure virtual methods
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virtual const void *Request(const wxString& item,
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size_t *size = NULL,
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wxIPCFormat format = wxIPC_TEXT) wxOVERRIDE;
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virtual bool StartAdvise(const wxString& item) wxOVERRIDE;
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virtual bool StopAdvise(const wxString& item) wxOVERRIDE;
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virtual bool Disconnect() wxOVERRIDE;
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protected:
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virtual bool DoExecute(const void *data, size_t size, wxIPCFormat format) wxOVERRIDE;
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virtual bool DoPoke(const wxString& item, const void *data, size_t size,
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wxIPCFormat format) wxOVERRIDE;
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virtual bool DoAdvise(const wxString& item, const void *data, size_t size,
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wxIPCFormat format) wxOVERRIDE;
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public:
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wxString m_topicName;
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wxDDEServer* m_server;
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wxDDEClient* m_client;
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WXHCONV m_hConv;
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const void* m_sendingData;
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int m_dataSize;
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wxDECLARE_NO_COPY_CLASS(wxDDEConnection);
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wxDECLARE_DYNAMIC_CLASS(wxDDEConnection);
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};
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class WXDLLIMPEXP_BASE wxDDEServer : public wxServerBase
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{
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public:
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wxDDEServer();
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bool Create(const wxString& server_name) wxOVERRIDE;
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virtual ~wxDDEServer();
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virtual wxConnectionBase *OnAcceptConnection(const wxString& topic) wxOVERRIDE;
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// Find/delete wxDDEConnection corresponding to the HCONV
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wxDDEConnection *FindConnection(WXHCONV conv);
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bool DeleteConnection(WXHCONV conv);
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wxString& GetServiceName() const { return (wxString&) m_serviceName; }
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wxDDEConnectionList& GetConnections() const
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{ return (wxDDEConnectionList&) m_connections; }
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protected:
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int m_lastError;
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wxString m_serviceName;
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wxDDEConnectionList m_connections;
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wxDECLARE_DYNAMIC_CLASS(wxDDEServer);
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};
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class WXDLLIMPEXP_BASE wxDDEClient: public wxClientBase
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{
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public:
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wxDDEClient();
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virtual ~wxDDEClient();
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bool ValidHost(const wxString& host) wxOVERRIDE;
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// Call this to make a connection. Returns NULL if cannot.
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virtual wxConnectionBase *MakeConnection(const wxString& host,
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const wxString& server,
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const wxString& topic) wxOVERRIDE;
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// Tailor this to return own connection.
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virtual wxConnectionBase *OnMakeConnection() wxOVERRIDE;
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// Find/delete wxDDEConnection corresponding to the HCONV
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wxDDEConnection *FindConnection(WXHCONV conv);
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bool DeleteConnection(WXHCONV conv);
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wxDDEConnectionList& GetConnections() const
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{ return (wxDDEConnectionList&) m_connections; }
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protected:
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int m_lastError;
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wxDDEConnectionList m_connections;
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wxDECLARE_DYNAMIC_CLASS(wxDDEClient);
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};
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void WXDLLIMPEXP_BASE wxDDEInitialize();
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void WXDLLIMPEXP_BASE wxDDECleanUp();
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#endif // _WX_DDE_H_
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