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 defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "dialup.h"
  17 #endif
  18
  19 #if wxUSE_DIALUP_MANAGER
  20
  21 #include "wx/event.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // misc
  25 // ----------------------------------------------------------------------------
  26
  27 class WXDLLIMPEXP_BASE wxArrayString;
  28
  29 #define WXDIALUP_MANAGER_DEFAULT_BEACONHOST  wxT("www.yahoo.com")
  30
  31 // ----------------------------------------------------------------------------
  32 // A class which groups functions dealing with connecting to the network from a
  33 // workstation using dial-up access to the net. There is at most one instance
  34 // of this class in the program accessed via GetDialUpManager().
  35 // ----------------------------------------------------------------------------
  36
  37 /* TODO
  38  *
  39  * 1. more configurability for Unix: i.e. how to initiate the connection, how
  40  *    to check for online status, &c.
  41  * 2. a function to enumerate all connections (ISPs) and show a dialog in
  42  *    Dial() allowing to choose between them if no ISP given
  43  * 3. add an async version of dialing functions which notify the caller about
  44  *    the progress (or may be even start another thread to monitor it)
  45  * 4. the static creation/accessor functions are not MT-safe - but is this
  46  *    really crucial? I think we may suppose they're always called from the
  47  *    main thread?
  48  */
  49
  50 class WXDLLEXPORT wxDialUpManager
  51 {
  52 public:
  53     // this function should create and return the object of the
  54     // platform-specific class derived from wxDialUpManager. It's implemented
  55     // in the platform-specific source files.
  56     static wxDialUpManager *Create();
  57
  58     // could the dialup manager be initialized correctly? If this function
  59     // returns false, no other functions will work neither, so it's a good idea
  60     // to call this function and check its result before calling any other
  61     // wxDialUpManager methods
  62     virtual bool IsOk() const = 0;
  63
  64     // virtual dtor for any base class
  65     virtual ~wxDialUpManager() { }
  66
  67     // operations
  68     // ----------
  69
  70     // fills the array with the names of all possible values for the first
  71     // parameter to Dial() on this machine and returns their number (may be 0)
  72     virtual size_t GetISPNames(wxArrayString& names) const = 0;
  73
  74     // dial the given ISP, use username and password to authentificate
  75     //
  76     // if no nameOfISP is given, the function will select the default one
  77     //
  78     // if no username/password are given, the function will try to do without
  79     // them, but will ask the user if really needed
  80     //
  81     // if async parameter is false, the function waits until the end of dialing
  82     // and returns true upon successful completion.
  83     // if async is true, the function only initiates the connection and returns
  84     // immediately - the result is reported via events (an event is sent
  85     // anyhow, but if dialing failed it will be a DISCONNECTED one)
  86     virtual bool Dial(const wxString& nameOfISP = wxEmptyString,
  87                       const wxString& username = wxEmptyString,
  88                       const wxString& password = wxEmptyString,
  89                       bool async = true) = 0;
  90
  91     // returns true if (async) dialing is in progress
  92     virtual bool IsDialing() const = 0;
  93
  94     // cancel dialing the number initiated with Dial(async = true)
  95     // NB: this won't result in DISCONNECTED event being sent
  96     virtual bool CancelDialing() = 0;
  97
  98     // hang up the currently active dial up connection
  99     virtual bool HangUp() = 0;
 100
 101     // online status
 102     // -------------
 103
 104     // returns true if the computer has a permanent network connection (i.e. is
 105     // on a LAN) and so there is no need to use Dial() function to go online
 106     //
 107     // NB: this functions tries to guess the result and it is not always
 108     //     guaranteed to be correct, so it's better to ask user for
 109     //     confirmation or give him a possibility to override it
 110     virtual bool IsAlwaysOnline() const = 0;
 111
 112     // returns true if the computer is connected to the network: under Windows,
 113     // this just means that a RAS connection exists, under Unix we check that
 114     // the "well-known host" (as specified by SetWellKnownHost) is reachable
 115     virtual bool IsOnline() const = 0;
 116
 117     // sometimes the built-in logic for determining the online status may fail,
 118     // so, in general, the user should be allowed to override it. This function
 119     // allows to forcefully set the online status - whatever our internal
 120     // algorithm may think about it.
 121     virtual void SetOnlineStatus(bool isOnline = true) = 0;
 122
 123     // set misc wxDialUpManager options
 124     // --------------------------------
 125
 126     // enable automatical checks for the connection status and sending of
 127     // wxEVT_DIALUP_CONNECTED/wxEVT_DIALUP_DISCONNECTED events. The interval
 128     // parameter is only for Unix where we do the check manually: under
 129     // Windows, the notification about the change of connection status is
 130     // instantenous.
 131     //
 132     // Returns false if couldn't set up automatic check for online status.
 133     virtual bool EnableAutoCheckOnlineStatus(size_t nSeconds = 60) = 0;
 134
 135     // disable automatic check for connection status change - notice that the
 136     // wxEVT_DIALUP_XXX events won't be sent any more neither.
 137     virtual void DisableAutoCheckOnlineStatus() = 0;
 138
 139     // additional Unix-only configuration
 140     // ----------------------------------
 141
 142     // under Unix, the value of well-known host is used to check whether we're
 143     // connected to the internet. It's unused under Windows, but this function
 144     // is always safe to call. The default value is www.yahoo.com.
 145     virtual void SetWellKnownHost(const wxString& hostname,
 146                                   int portno = 80) = 0;
 147
 148     // Sets the commands to start up the network and to hang up again. Used by
 149     // the Unix implementations only.
 150     virtual void
 151     SetConnectCommand(const wxString& commandDial = wxT("/usr/bin/pon"),
 152                       const wxString& commandHangup = wxT("/usr/bin/poff")) = 0;
 153 };
 154
 155 // ----------------------------------------------------------------------------
 156 // wxDialUpManager events
 157 // ----------------------------------------------------------------------------
 158
 159 BEGIN_DECLARE_EVENT_TYPES()
 160     DECLARE_EVENT_TYPE(wxEVT_DIALUP_CONNECTED, 450)
 161     DECLARE_EVENT_TYPE(wxEVT_DIALUP_DISCONNECTED, 451)
 162 END_DECLARE_EVENT_TYPES()
 163
 164 // the event class for the dialup events
 165 class WXDLLEXPORT wxDialUpEvent : public wxEvent
 166 {
 167 public:
 168     wxDialUpEvent(bool isConnected, bool isOwnEvent) : wxEvent(isOwnEvent)
 169     {
 170         SetEventType(isConnected ? wxEVT_DIALUP_CONNECTED
 171                                  : wxEVT_DIALUP_DISCONNECTED);
 172     }
 173
 174     // is this a CONNECTED or DISCONNECTED event?
 175     bool IsConnectedEvent() const
 176         { return GetEventType() == wxEVT_DIALUP_CONNECTED; }
 177
 178     // does this event come from wxDialUpManager::Dial() or from some extrenal
 179     // process (i.e. does it result from our own attempt to establish the
 180     // connection)?
 181     bool IsOwnEvent() const { return m_id != 0; }
 182
 183     // implement the base class pure virtual
 184     virtual wxEvent *Clone() const { return new wxDialUpEvent(*this); }
 185
 186 private:
 187     DECLARE_NO_ASSIGN_CLASS(wxDialUpEvent)
 188 };
 189
 190 // the type of dialup event handler function
 191 typedef void (wxEvtHandler::*wxDialUpEventFunction)(wxDialUpEvent&);
 192
 193 #define wxDialUpEventHandler(func) \
 194     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxDialUpEventFunction, &func)
 195
 196 // macros to catch dialup events
 197 #define EVT_DIALUP_CONNECTED(func) \
 198     wx__DECLARE_EVT0(wxEVT_DIALUP_CONNECTED, wxDialUpEventHandler(func))
 199 #define EVT_DIALUP_DISCONNECTED(func) \
 200     wx__DECLARE_EVT0(wxEVT_DIALUP_DISCONNECTED, wxDialUpEventHandler(func))
 201
 202
 203 #endif // wxUSE_DIALUP_MANAGER
 204
 205 #endif // _WX_DIALUP_H