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#define GAMETYPE_TWOPLAYERS 3
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#define GAMETYPE_TWOPLAYERS 3
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// global variables used in this module only
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// global variables used in this module only
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static int newgame_type = 0;
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static int newgame_type = 0;
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static char ascii_hostname[256];
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static bool is_internet_available = false;
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static bool is_chessserver_reachable = false;
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// prototypes of local functions
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// prototypes of local functions
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static void StartThread_ThisDialog (void *thread_parms);
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static void StartThread_ThisDialog (void *thread_parms);
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static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam);
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static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam);
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   SetWindowText (hMainWnd, PROGRAM_NAME); // update window title
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   SetWindowText (hMainWnd, PROGRAM_NAME); // update window title
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   the_board.reevaluate = true; // evaluate the new board
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   the_board.reevaluate = true; // evaluate the new board
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   the_scene.update = true; // update scene
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   the_scene.update = true; // update scene
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   return; // finished, a new game of the chosen type is being fired up
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   return; // finished, a new game of the chosen type is being fired up
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}
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static void StartThread_TestConnectionInBackground (void *thread_parms)
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{
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   // this function runs in a separate thread and tests the connectivity to the chess server in the background
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   char icmp_send_buffer[32] = "Chess Giants connectivity test";
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   void *icmp_recv_buffer[sizeof (ICMP_ECHO_REPLY) + sizeof (icmp_send_buffer)];
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   char ascii_hostname[256];
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   struct hostent *hostinfo;
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   uint32_t server_ipaddr;
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   HANDLE icmp_descriptor;
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   // since this is a synchronous operation, it's a good idea to do this on this separate thread
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   ConvertTo7BitASCII (ascii_hostname, sizeof (ascii_hostname), options.network.server_address);
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   if ((hostinfo = gethostbyname (ascii_hostname)) != NULL)
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   {
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      // DO NOT CONNECT TO THE SERVER AND DISCONNECT IMMEDIATELY ELSE IT WILL RESULT IN AN IP BAN. Use an ICMP ping instead.
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      server_ipaddr = inet_addr (inet_ntoa (*(struct in_addr *) hostinfo->h_addr_list[0]));
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      icmp_descriptor = IcmpCreateFile ();
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      if ((icmp_descriptor != INVALID_HANDLE_VALUE)
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          && (IcmpSendEcho (icmp_descriptor, server_ipaddr, icmp_send_buffer, sizeof (icmp_send_buffer), NULL, icmp_recv_buffer, sizeof (icmp_recv_buffer), 5000) != 0)
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          && (((ICMP_ECHO_REPLY *) icmp_recv_buffer)->Status == 0))
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         is_chessserver_reachable = true; // on success, remember we could reach the chess server
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   }
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   return; // _endthread() implied
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}
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}
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static void StartThread_ThisDialog (void *thread_parms)
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static void StartThread_ThisDialog (void *thread_parms)
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{
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{
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   // this function runs in a separate thread, for that's the only way (seemingly)
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   // this function runs in a separate thread, for that's the only way (seemingly)
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   // to implement a non-modal message box using the Common Controls library.
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   // to implement a non-modal message box using the Common Controls library.
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   is_internet_available = false; // assume Internet doesn't work until told otherwise
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   is_chessserver_reachable = false;
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   // start the thread that will tell whether Internet works
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   _beginthread (StartThread_TestConnectionInBackground, 0, NULL); // so fire up a new one
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   // display the dialog box
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   // display the dialog box
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   newgame_type = DialogBox (hAppInstance, MAKEINTRESOURCE (THIS_DIALOG), hMainWnd, DialogProc_ThisDialog);
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   newgame_type = DialogBox (hAppInstance, MAKEINTRESOURCE (THIS_DIALOG), hMainWnd, DialogProc_ThisDialog);
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   if (newgame_type > 0)
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   if (newgame_type > 0)
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      is_dialogbox_newgame_validated = true;
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      is_dialogbox_newgame_validated = true;
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static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam)
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static int CALLBACK DialogProc_ThisDialog (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam)
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{
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{
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   // message handler for the dialog box
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   // message handler for the dialog box
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   unsigned long connection_state;
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   unsigned short wParam_hiword;
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   unsigned short wParam_hiword;
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   unsigned short wParam_loword;
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   unsigned short wParam_loword;
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   // filter out the commonly used message values
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   // filter out the commonly used message values
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   wParam_hiword = HIWORD (wParam);
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   wParam_hiword = HIWORD (wParam);
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   wParam_loword = LOWORD (wParam);
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   wParam_loword = LOWORD (wParam);
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   // any message will do (mouse move, etc.) -- is the chess server reachable ?
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   if (!is_internet_available && is_chessserver_reachable)
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   {
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      is_internet_available = true; // remember we no longer need to look after that (FLAG THIS BEFORE ANY SendMessage() HAPPENS!)
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), LOCALIZE (L"NewGame_OnlineDescription"));
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      EnableWindow (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), true);
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      EnableWindow (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), true);
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   }
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   // have we just fired up this window ?
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   // have we just fired up this window ?
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   if (message == WM_INITDIALOG)
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   if (message == WM_INITDIALOG)
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   {
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   {
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      // center the window
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      // center the window
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      SetWindowText (hWnd, LOCALIZE (L"NewGame_Title"));
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      SetWindowText (hWnd, LOCALIZE (L"NewGame_Title"));
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_QUESTION), LOCALIZE (L"NewGame_Question"));
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_QUESTION), LOCALIZE (L"NewGame_Question"));
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      // if computer is connected to a network, enable online mode, else don't.
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      // if computer is connected to a network, enable online mode, else don't.
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), LOCALIZE (L"NewGame_Online"));
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), LOCALIZE (L"NewGame_Online"));
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      if (InternetGetConnectedState (&connection_state, 0)
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          && (ConvertTo7BitASCII (ascii_hostname, sizeof (ascii_hostname), options.network.server_address), gethostbyname (ascii_hostname) != NULL))
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      {
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         Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), LOCALIZE (L"NewGame_OnlineDescription"));
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         EnableWindow (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), true);
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         EnableWindow (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), true);
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      }
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      else
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      {
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         Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), LOCALIZE (L"Error_NetworkInitializationFailed"));
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), LOCALIZE (L"Error_NetworkInitializationFailed"));
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         EnableWindow (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), false);
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      EnableWindow (GetDlgItem (hWnd, BUTTON_NEWGAME_ONLINE), false);
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         EnableWindow (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), false);
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      EnableWindow (GetDlgItem (hWnd, STATICTEXT_NEWGAME_ONLINEDESCRIPTION), false);
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      }
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_COMPUTER), LOCALIZE (L"NewGame_Computer"));
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_COMPUTER), LOCALIZE (L"NewGame_Computer"));
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_COMPUTERDESCRIPTION), LOCALIZE (L"NewGame_ComputerDescription"));
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      Static_SetText (GetDlgItem (hWnd, STATICTEXT_NEWGAME_COMPUTERDESCRIPTION), LOCALIZE (L"NewGame_ComputerDescription"));
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_HUMAN), LOCALIZE (L"NewGame_Human"));
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      SetWindowText (GetDlgItem (hWnd, BUTTON_NEWGAME_HUMAN), LOCALIZE (L"NewGame_Human"));