include/wx/dialup.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/dialup.h
   3 // Purpose:     Network related wxWidgets classes and functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     07.07.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_DIALUP_H
  13 #define _WX_DIALUP_H
  14
  15 #if wxUSE_DIALUP_MANAGER
  16
  17 #include "wx/event.h"
  18
  19 // ----------------------------------------------------------------------------
  20 // misc
  21 // ----------------------------------------------------------------------------
  22
  23 class WXDLLIMPEXP_FWD_BASE wxArrayString;
  24
  25 #define WXDIALUP_MANAGER_DEFAULT_BEACONHOST  wxT("www.yahoo.com")
  26
  27 // ----------------------------------------------------------------------------
  28 // A class which groups functions dealing with connecting to the network from a
  29 // workstation using dial-up access to the net. There is at most one instance
  30 // of this class in the program accessed via GetDialUpManager().
  31 // ----------------------------------------------------------------------------
  32
  33 /* TODO
  34  *
  35  * 1. more configurability for Unix: i.e. how to initiate the connection, how
  36  *    to check for online status, &c.
  37  * 2. a function to enumerate all connections (ISPs) and show a dialog in
  38  *    Dial() allowing to choose between them if no ISP given
  39  * 3. add an async version of dialing functions which notify the caller about
  40  *    the progress (or may be even start another thread to monitor it)
  41  * 4. the static creation/accessor functions are not MT-safe - but is this
  42  *    really crucial? I think we may suppose they're always called from the
  43  *    main thread?
  44  */
  45
  46 class WXDLLIMPEXP_CORE wxDialUpManager
  47 {
  48 public:
  49     // this function should create and return the object of the
  50     // platform-specific class derived from wxDialUpManager. It's implemented
  51     // in the platform-specific source files.
  52     static wxDialUpManager *Create();
  53
  54     // could the dialup manager be initialized correctly? If this function
  55     // returns false, no other functions will work neither, so it's a good idea
  56     // to call this function and check its result before calling any other
  57     // wxDialUpManager methods
  58     virtual bool IsOk() const = 0;
  59
  60     // virtual dtor for any base class
  61     virtual ~wxDialUpManager() { }
  62
  63     // operations
  64     // ----------
  65
  66     // fills the array with the names of all possible values for the first
  67     // parameter to Dial() on this machine and returns their number (may be 0)
  68     virtual size_t GetISPNames(wxArrayString& names) const = 0;
  69
  70     // dial the given ISP, use username and password to authentificate
  71     //
  72     // if no nameOfISP is given, the function will select the default one
  73     //
  74     // if no username/password are given, the function will try to do without
  75     // them, but will ask the user if really needed
  76     //
  77     // if async parameter is false, the function waits until the end of dialing
  78     // and returns true upon successful completion.
  79     // if async is true, the function only initiates the connection and returns
  80     // immediately - the result is reported via events (an event is sent
  81     // anyhow, but if dialing failed it will be a DISCONNECTED one)
  82     virtual bool Dial(const wxString& nameOfISP = wxEmptyString,
  83                       const wxString& username = wxEmptyString,
  84                       const wxString& password = wxEmptyString,
  85                       bool async = true) = 0;
  86
  87     // returns true if (async) dialing is in progress
  88     virtual bool IsDialing() const = 0;
  89
  90     // cancel dialing the number initiated with Dial(async = true)
  91     // NB: this won't result in DISCONNECTED event being sent
  92     virtual bool CancelDialing() = 0;
  93
  94     // hang up the currently active dial up connection
  95     virtual bool HangUp() = 0;
  96
  97     // online status
  98     // -------------
  99
 100     // returns true if the computer has a permanent network connection (i.e. is
 101     // on a LAN) and so there is no need to use Dial() function to go online
 102     //
 103     // NB: this functions tries to guess the result and it is not always
 104     //     guaranteed to be correct, so it's better to ask user for
 105     //     confirmation or give him a possibility to override it
 106     virtual bool IsAlwaysOnline() const = 0;
 107
 108     // returns true if the computer is connected to the network: under Windows,
 109     // this just means that a RAS connection exists, under Unix we check that
 110     // the "well-known host" (as specified by SetWellKnownHost) is reachable
 111     virtual bool IsOnline() const = 0;
 112
 113     // sometimes the built-in logic for determining the online status may fail,
 114     // so, in general, the user should be allowed to override it. This function
 115     // allows to forcefully set the online status - whatever our internal
 116     // algorithm may think about it.
 117     virtual void SetOnlineStatus(bool isOnline = true) = 0;
 118
 119     // set misc wxDialUpManager options
 120     // --------------------------------
 121
 122     // enable automatical checks for the connection status and sending of
 123     // wxEVT_DIALUP_CONNECTED/wxEVT_DIALUP_DISCONNECTED events. The interval
 124     // parameter is only for Unix where we do the check manually: under
 125     // Windows, the notification about the change of connection status is
 126     // instantenous.
 127     //
 128     // Returns false if couldn't set up automatic check for online status.
 129     virtual bool EnableAutoCheckOnlineStatus(size_t nSeconds = 60) = 0;
 130
 131     // disable automatic check for connection status change - notice that the
 132     // wxEVT_DIALUP_XXX events won't be sent any more neither.
 133     virtual void DisableAutoCheckOnlineStatus() = 0;
 134
 135     // additional Unix-only configuration
 136     // ----------------------------------
 137
 138     // under Unix, the value of well-known host is used to check whether we're
 139     // connected to the internet. It's unused under Windows, but this function
 140     // is always safe to call. The default value is www.yahoo.com.
 141     virtual void SetWellKnownHost(const wxString& hostname,
 142                                   int portno = 80) = 0;
 143
 144     // Sets the commands to start up the network and to hang up again. Used by
 145     // the Unix implementations only.
 146     virtual void
 147     SetConnectCommand(const wxString& commandDial = wxT("/usr/bin/pon"),
 148                       const wxString& commandHangup = wxT("/usr/bin/poff")) = 0;
 149 };
 150
 151 // ----------------------------------------------------------------------------
 152 // wxDialUpManager events
 153 // ----------------------------------------------------------------------------
 154
 155 class WXDLLIMPEXP_FWD_CORE wxDialUpEvent;
 156
 157 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_DIALUP_CONNECTED, wxDialUpEvent );
 158 wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_DIALUP_DISCONNECTED, wxDialUpEvent );
 159
 160 // the event class for the dialup events
 161 class WXDLLIMPEXP_CORE wxDialUpEvent : public wxEvent
 162 {
 163 public:
 164     wxDialUpEvent(bool isConnected, bool isOwnEvent) : wxEvent(isOwnEvent)
 165     {
 166         SetEventType(isConnected ? wxEVT_DIALUP_CONNECTED
 167                                  : wxEVT_DIALUP_DISCONNECTED);
 168     }
 169
 170     // is this a CONNECTED or DISCONNECTED event?
 171     bool IsConnectedEvent() const
 172         { return GetEventType() == wxEVT_DIALUP_CONNECTED; }
 173
 174     // does this event come from wxDialUpManager::Dial() or from some external
 175     // process (i.e. does it result from our own attempt to establish the
 176     // connection)?
 177     bool IsOwnEvent() const { return m_id != 0; }
 178
 179     // implement the base class pure virtual
 180     virtual wxEvent *Clone() const { return new wxDialUpEvent(*this); }
 181
 182 private:
 183     wxDECLARE_NO_ASSIGN_CLASS(wxDialUpEvent);
 184 };
 185
 186 // the type of dialup event handler function
 187 typedef void (wxEvtHandler::*wxDialUpEventFunction)(wxDialUpEvent&);
 188
 189 #define wxDialUpEventHandler(func) \
 190     wxEVENT_HANDLER_CAST(wxDialUpEventFunction, func)
 191
 192 // macros to catch dialup events
 193 #define EVT_DIALUP_CONNECTED(func) \
 194     wx__DECLARE_EVT0(wxEVT_DIALUP_CONNECTED, wxDialUpEventHandler(func))
 195 #define EVT_DIALUP_DISCONNECTED(func) \
 196     wx__DECLARE_EVT0(wxEVT_DIALUP_DISCONNECTED, wxDialUpEventHandler(func))
 197
 198
 199 #endif // wxUSE_DIALUP_MANAGER
 200
 201 #endif // _WX_DIALUP_H