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  1. // window_main.cpp
  2.  
  3. #include "../common.h"
  4.  
  5.  
  6. // global variables used in this module only
  7. static wchar_t folder_path[MAX_PATH];
  8.  
  9.  
  10. // prototypes of local functions
  11. static bool Button_IsHovered (guibutton_t *button, int gui_x, int gui_y);
  12. static bool Button_UpdateHoverState (guibutton_t *button, int gui_x, int gui_y);
  13.  
  14.  
  15. LRESULT CALLBACK WindowProc_Main (HWND hWnd, unsigned int message, WPARAM wParam, LPARAM lParam)
  16. {
  17.    // this is the main message handler for the program
  18.  
  19.    static wchar_t fen_string[128];
  20.    static char selectable_parts[14] = "PRNBQK kqbnrp";
  21.    static int prevgui_x = 0;
  22.    static int prevgui_y = 0;
  23.    static bool ctrl_pressed = false;
  24.    static bool rbutton_pushed = false;
  25.  
  26.    unsigned short wParam_hiword;
  27.    unsigned short wParam_loword;
  28.    int prev_hovered_position[2];
  29.    player_t *current_player;
  30.    player_t *opposite_player;
  31.    player_t *local_player;
  32.    player_t *remote_player;
  33.    ccreply_t *entered_ccreply;
  34.    boardmove_t *current_move;
  35.    float board_x;
  36.    float board_y;
  37.    int gui_x;
  38.    int gui_y;
  39.    int line;
  40.    int column;
  41.    int index_line;
  42.    int index_column;
  43.    int part_index;
  44.    int part_color;
  45.    int viewer_index;
  46.    RECT rect;
  47.    POINT point;
  48.  
  49.    // filter out the commonly used message values
  50.    wParam_hiword = HIWORD (wParam);
  51.    wParam_loword = LOWORD (wParam);
  52.  
  53.    // get current and opposite players and see if we're online
  54.    current_player = Player_GetCurrent ();
  55.    opposite_player = Player_GetOpposite ();
  56.    remote_player = Player_FindByType (PLAYER_INTERNET);
  57.  
  58.    ////////////////////////////////////////////////////////////////////////////////////////////////
  59.    // has the window just been fired up ?
  60.    if (message == WM_CREATE)
  61.    {
  62.       the_scene.gui.is_entering_text = false; // we are NOT entering text yet
  63.  
  64.       // call the default window message processing function to keep things going
  65.       return (DefWindowProc (hWnd, message, wParam, lParam));
  66.    }
  67.  
  68.    ////////////////////////////////////////////////////////////////////////////////////////////////
  69.    // else is the window being resized ?
  70.    else if ((message == WM_SIZE) || (message == WM_WINDOWPOSCHANGED))
  71.    {
  72.       GetWindowRect (hMainWnd, &rect); // grab the current window size and update the options accordingly
  73.       options.want_maximized = (rect.right - rect.left > GetSystemMetrics (SM_CXMAXIMIZED) * 90 / 100) && (rect.bottom - rect.top > GetSystemMetrics (SM_CYMAXIMIZED) * 80 / 100);
  74.       if (!options.want_maximized)
  75.       {
  76.          options.window_width = max (rect.right - rect.left, 640); // min window width
  77.          options.window_height = max (rect.bottom - rect.top, 480); // min window height (only save them when the window is not maximized)
  78.       }
  79.  
  80.       return (0); // don't let Windows do the default processing on this message
  81.    }
  82.  
  83.    ////////////////////////////////////////////////////////////////////////////////////////////////
  84.    // else have we clicked on the close button ?
  85.    else if (message == WM_CLOSE)
  86.    {
  87.       if ((the_board.game_state == STATE_PLAYING) && ((the_board.move_count > 1) || (remote_player != NULL)))
  88.          DialogBox_Quit (); // if a game has started OR if we are online against somebody, ask for confirmation
  89.       else
  90.          is_dialogbox_quit_validated = true; // if game hasn't started yet, quit without question
  91.  
  92.       return (0); // don't let Windows do the default processing on this message
  93.    }
  94.  
  95.    ////////////////////////////////////////////////////////////////////////////////////////////////
  96.    // else is the user closing its session OR the window is being destroyed ?
  97.    else if ((message == WM_QUERYENDSESSION) || (message == WM_ENDSESSION) || (message == WM_DESTROY))
  98.       terminate_everything = true; // suicide (for some reason, PostQuitMessage() is unreliable !?)
  99.  
  100.    /////////////////
  101.    // MENU EVENTS //
  102.    /////////////////
  103.  
  104.    ///////////////
  105.    // menu command
  106.    else if (message == WM_COMMAND)
  107.    {
  108.       // ANY menu choice makes the "new game" / "open game" front GUI button disappear
  109.       GUIBUTTON_DISABLE (the_scene.gui.newgamebutton);
  110.       GUIBUTTON_DISABLE (the_scene.gui.opengamebutton);
  111.  
  112.       // game menu, new game
  113.       if (wParam_loword == MENUID_GAME_NEWGAME)
  114.       {
  115.          if ((the_board.game_state == STATE_PLAYING) && (the_board.move_count > 1))
  116.             DialogBox_Resign (RESIGNTYPE_NEWGAME); // if a game is playing, ask to resign first
  117.          else
  118.             DialogBox_NewGame (); // game not started yet, show the new game dialog box
  119.       }
  120.  
  121.       // game menu, setup start position
  122.       else if (wParam_loword == MENUID_GAME_SETUPPOSITION)
  123.          Board_EnterSetupPosition (&the_board); // enter setup position mode
  124.  
  125.       // game menu, load game
  126.       else if (wParam_loword == MENUID_GAME_LOAD)
  127.       {
  128.          if ((the_board.game_state == STATE_PLAYING) && (the_board.move_count > 1))
  129.             DialogBox_Resign (RESIGNTYPE_LOADGAME); // if a game is playing, ask to resign first
  130.          else
  131.             DialogBox_Load (); // fire up the load dialog box
  132.       }
  133.  
  134.       // game menu, save game
  135.       else if (wParam_loword == MENUID_GAME_SAVE)
  136.       {
  137.          if (save_pathname[0] != 0)
  138.             is_dialogbox_save_validated = true; // if the filename is known, save it directly
  139.          else
  140.             DialogBox_Save (false); // else fire up the save dialog box
  141.       }
  142.  
  143.       // game menu, save as
  144.       else if (wParam_loword == MENUID_GAME_SAVEAS)
  145.          DialogBox_Save (false); // fire up the save dialog box
  146.  
  147.       // game menu, save position as
  148.       else if (wParam_loword == MENUID_GAME_SAVEPOSITIONAS)
  149.          DialogBox_SavePosition (); // fire up the save position dialog box
  150.  
  151.       // game menu, pause
  152.       else if (wParam_loword == MENUID_GAME_PAUSE)
  153.       {
  154.          is_paused ^= true; // toggle game pause state on/off
  155.          CheckMenuItem (GetMenu (hWnd), MENUID_GAME_PAUSE, (is_paused ? MF_CHECKED : MF_UNCHECKED)); // highlight the menu entry as necessary
  156.          the_board.reevaluate = true; // evaluate board again
  157.       }
  158.  
  159.       // game menu, resign
  160.       else if (wParam_loword == MENUID_GAME_RESIGN)
  161.          DialogBox_Resign (RESIGNTYPE_UNDEFINED); // if a game has started, ask for confirmation
  162.  
  163.       // game menu, statistics (stats are only available in online mode)
  164.       else if (wParam_loword == MENUID_GAME_STATISTICS)
  165.       {
  166.          local_player = Player_FindByType (PLAYER_HUMAN);
  167.          if (local_player != NULL)
  168.             PlayerCard_FindOrCreate (local_player->name); // display player's own player card
  169.       }
  170.  
  171.       // game menu, options
  172.       else if (wParam_loword == MENUID_GAME_OPTIONS)
  173.          DialogBox_Options (); // fire up the options dialog box
  174.  
  175.       // game menu, quit
  176.       else if (wParam_loword == MENUID_GAME_QUIT)
  177.       {
  178.          if ((the_board.game_state == STATE_PLAYING) && ((the_board.move_count > 1) || (remote_player != NULL)))
  179.             DialogBox_Quit (); // if a game has started OR if we are online against somebody, ask for confirmation
  180.          else
  181.             is_dialogbox_quit_validated = true; // if game hasn't started yet, quit without question
  182.       }
  183.  
  184.       // move menu, cancel last move
  185.       else if (wParam_loword == MENUID_MOVE_CANCELLASTMOVE)
  186.          the_board.players[current_viewer].wants_cancel = true; // remember this player wants to cancel his last move
  187.  
  188.       // move menu, suggest move
  189.       else if (wParam_loword == MENUID_MOVE_SUGGESTMOVE)
  190.          the_board.players[current_viewer].wants_hint = true; // remember this player wants a hint
  191.  
  192.       // move menu, comment move
  193.       else if (wParam_loword == MENUID_MOVE_COMMENTMOVE)
  194.          DialogBox_Comment (); // fire up the comment dialog box
  195.  
  196.       // move menu, go to move
  197.       else if (wParam_loword == MENUID_MOVE_GOTOMOVE)
  198.          DialogBox_GoToMove (); // fire up the go to move dialog box
  199.  
  200.       // chessboard menu, swap sides
  201.       else if (wParam_loword == MENUID_CHESSBOARD_SWAPSIDES)
  202.          the_board.want_playerswap = true; // remember board sides are to be swapped
  203.  
  204.       // chessboard menu, rename players
  205.       else if (wParam_loword == MENUID_CHESSBOARD_RENAMESIDES)
  206.          DialogBox_RenameSides(); // fire up the rename sides dialog box
  207.  
  208.       // chessboard menu, beginning of game
  209.       else if (wParam_loword == MENUID_CHESSBOARD_BEGINNINGOFGAME)
  210.       {
  211.          the_board.viewed_move = 0; // enter view mode and go to the beginning of the game
  212.          Audio_PlaySound (SOUNDTYPE_CLICK, 0.0f, 0.0f, 0.04f); // make a click sound at the center of the board
  213.          the_board.reevaluate = true; // evaluate board again
  214.       }
  215.  
  216.       // chessboard menu, previous move (only if arrow is enabled)
  217.       else if ((wParam_loword == MENUID_CHESSBOARD_PREVIOUSMOVE) && (the_scene.gui.larrow.state != 0))
  218.       {
  219.          the_board.viewed_move--; // enter view mode and go back one move
  220.          Audio_PlaySound (SOUNDTYPE_CLICK, 0.0f, 0.0f, 0.04f); // make a click sound at the center of the board
  221.          the_board.reevaluate = true; // evaluate board again
  222.       }
  223.  
  224.       // chessboard menu, next move (only if arrow is enabled)
  225.       else if ((wParam_loword == MENUID_CHESSBOARD_NEXTMOVE) && (the_scene.gui.rarrow.state != 0))
  226.       {
  227.          the_board.viewed_move++; // enter view mode and go forward one move
  228.          Audio_PlaySound (SOUNDTYPE_CLICK, 0.0f, 0.0f, 0.04f); // make a click sound at the center of the board
  229.          the_board.reevaluate = true; // evaluate board again
  230.       }
  231.  
  232.       // chessboard menu, current state of game
  233.       else if (wParam_loword == MENUID_CHESSBOARD_CURRENTSTATEOFGAME)
  234.       {
  235.          the_board.viewed_move = the_board.move_count - 1; // enter view mode and go to the current state of the game
  236.          Audio_PlaySound (SOUNDTYPE_CLICK, 0.0f, 0.0f, 0.04f); // make a click sound at the center of the board
  237.          the_board.reevaluate = true; // evaluate board again
  238.       }
  239.  
  240.       // chessboard menu, top view
  241.       else if (wParam_loword == MENUID_CHESSBOARD_TOPVIEW)
  242.       {
  243.          // cycle through both players and change their view angles EXCEPT the opponent if he's human
  244.          for (viewer_index = 0; viewer_index < 2; viewer_index++)
  245.             if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  246.                 || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  247.                 || (viewer_index == current_viewer))
  248.             {
  249.                the_board.players[viewer_index].view_pitch = 89.99f;
  250.                the_board.players[viewer_index].view_yaw = (current_viewer == COLOR_BLACK ? 90.0f : -90.0f);
  251.                the_board.players[viewer_index].view_distance = 58.0f;
  252.             }
  253.       }
  254.  
  255.       // chessboard menu, default view
  256.       else if (wParam_loword == MENUID_CHESSBOARD_DEFAULTVIEW)
  257.       {
  258.          // cycle through both players and change their view angles EXCEPT the opponent if he's human
  259.          for (viewer_index = 0; viewer_index < 2; viewer_index++)
  260.             if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  261.                 || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  262.                 || (viewer_index == current_viewer))
  263.             {
  264.                the_board.players[viewer_index].view_pitch = 55.0f;
  265.                the_board.players[viewer_index].view_yaw = (current_viewer == COLOR_BLACK ? 90.0f : -90.0f);
  266.                the_board.players[viewer_index].view_distance = 70.0f;
  267.             }
  268.       }
  269.  
  270.       // chessboard menu, reset view
  271.       else if (wParam_loword == MENUID_CHESSBOARD_RESETVIEW)
  272.       {
  273.          // cycle through both players and change their view angles EXCEPT the opponent if he's human
  274.          for (viewer_index = 0; viewer_index < 2; viewer_index++)
  275.             if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  276.                 || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  277.                 || (viewer_index == current_viewer))
  278.             {
  279.                the_board.players[viewer_index].view_pitch = the_board.players[current_viewer].custom_pitch;
  280.                the_board.players[viewer_index].view_yaw = the_board.players[current_viewer].custom_yaw;
  281.                the_board.players[viewer_index].view_distance = the_board.players[current_viewer].custom_distance;
  282.             }
  283.       }
  284.  
  285.       // chessboard menu, zoom in
  286.       else if (wParam_loword == MENUID_CHESSBOARD_ZOOMIN)
  287.       {
  288.          // scroll up & save this as the new custom distance
  289.          the_board.players[current_viewer].view_distance = max (48.0f, the_board.players[current_viewer].view_distance - 2.0f);
  290.          the_board.players[current_viewer].custom_distance = the_board.players[current_viewer].view_distance;
  291.          the_scene.update = true; // update the 3D scene
  292.       }
  293.  
  294.       // chessboard menu, zoom out
  295.       else if (wParam_loword == MENUID_CHESSBOARD_ZOOMOUT)
  296.       {
  297.          // scroll down & save this as the new custom distance
  298.          the_board.players[current_viewer].view_distance = min (100.0f, the_board.players[current_viewer].view_distance + 2.0f);
  299.          the_board.players[current_viewer].custom_distance = the_board.players[current_viewer].view_distance;
  300.          the_scene.update = true; // update the 3D scene
  301.       }
  302.  
  303.       // chessboard menu, change appearance
  304.       else if (wParam_loword == MENUID_CHESSBOARD_CHANGEAPPEARANCE)
  305.          DialogBox_ChangeAppearance ();
  306.  
  307.       // chessboard menu, display windows desktop
  308.       else if (wParam_loword == MENUID_CHESSBOARD_DISPLAYWINDOWSDESKTOP)
  309.          ShowWindow (hWnd, SW_MINIMIZE);
  310.  
  311.       // internet menu, show online players
  312.       else if (wParam_loword == MENUID_INTERNET_SHOWONLINEPLAYERS)
  313.          Window_Opponents ();
  314.  
  315.       // internet menu, show sought games
  316.       else if (wParam_loword == MENUID_INTERNET_SHOWSOUGHTGAMES)
  317.          Window_Sought ();
  318.  
  319.       // internet menu, seek game
  320.       else if (wParam_loword == MENUID_INTERNET_SEEKGAME)
  321.          DialogBox_SendSeek ();
  322.  
  323.       // internet menu, chatter channels
  324.       else if (wParam_loword == MENUID_INTERNET_CHATTERCHANNELS)
  325.          Window_ChatterChannels ();
  326.  
  327.       // internet menu, enter chat text
  328.       else if (wParam_loword == MENUID_INTERNET_ENTERCHATTEXT)
  329.          PostMessage (hWnd, WM_CHAR, L' ', 0); // emulate a space bar hit
  330.  
  331.       // internet menu, display player card
  332.       else if (wParam_loword == MENUID_INTERNET_DISPLAYPLAYERCARD)
  333.          DialogBox_PlayerInfoName ();
  334.  
  335.       // internet menu, display your card
  336.       else if (wParam_loword == MENUID_INTERNET_DISPLAYYOURCARD)
  337.       {
  338.          local_player = Player_FindByType (PLAYER_HUMAN);
  339.          if (local_player != NULL)
  340.             PlayerCard_FindOrCreate (local_player->name); // display player's own player card
  341.       }
  342.  
  343.       // internet menu, MOTD
  344.       else if (wParam_loword == MENUID_INTERNET_MOTD)
  345.          Window_MOTD ();
  346.  
  347.       // help menu, help
  348.       else if (wParam_loword == MENUID_HELP_HELP)
  349.       {
  350.          swprintf_s (folder_path, WCHAR_SIZEOF (folder_path), L"%s\\Chess Giants (%s).html", app_path, languages[language_id].name);
  351.          if (_waccess (folder_path, 0) != 0)
  352.             swprintf_s (folder_path, WCHAR_SIZEOF (folder_path), L"%s\\Chess Giants (English).html", app_path);
  353.          ShellExecute (NULL, L"open", folder_path, NULL, NULL, SW_MAXIMIZE); // fire up the help file
  354.       }
  355.  
  356.       // help menu, get chess games
  357.       else if (wParam_loword == MENUID_HELP_GETCHESSGAMES)
  358.          ShellExecute (NULL, L"open", L"http://www.chessgames.com", NULL, NULL, SW_MAXIMIZE); // fire up the browser
  359.  
  360.       // help menu, add/modify visual themes
  361.       else if (wParam_loword == MENUID_HELP_ADDMODIFYVISUALTHEMES)
  362.       {
  363.          swprintf_s (folder_path, WCHAR_SIZEOF (folder_path), L"%s\\themes", app_path);
  364.          ShellExecute (NULL, L"open", folder_path, NULL, NULL, SW_SHOWNORMAL); // fire up Windows Explorer
  365.       }
  366.  
  367.       // help menu, add/modify engines
  368.       else if (wParam_loword == MENUID_HELP_ADDMODIFYENGINES)
  369.       {
  370.          swprintf_s (folder_path, WCHAR_SIZEOF (folder_path), L"%s\\engines", app_path);
  371.          ShellExecute (NULL, L"open", folder_path, NULL, NULL, SW_SHOWNORMAL); // fire up Windows Explorer
  372.       }
  373.  
  374.       // help menu, add/modify translations
  375.       else if (wParam_loword == MENUID_HELP_ADDMODIFYTRANSLATIONS)
  376.       {
  377.          swprintf_s (folder_path, WCHAR_SIZEOF (folder_path), L"%s\\data\\languages", app_path);
  378.          ShellExecute (NULL, L"open", folder_path, NULL, NULL, SW_SHOWNORMAL); // fire up Windows Explorer
  379.       }
  380.  
  381.       // help menu, report a problem to the author
  382.       else if (wParam_loword == MENUID_HELP_REPORTAPROBLEM)
  383.       {
  384.          // send the game engine history to the author and display an error message if failed
  385.          if (MessageBox (hMainWnd, LOCALIZE (L"ReportAProblem"), LOCALIZE (L"ImportantMessage"), MB_ICONQUESTION | MB_YESNOCANCEL | MB_DEFBUTTON3) == IDYES)
  386.             if (Debug_SendLogToAuthor ("user request", true)) // with user description
  387.                MessageBox (hMainWnd, LOCALIZE (L"MessageSent"), PROGRAM_NAME, MB_ICONINFORMATION | MB_OK);
  388.             else
  389.                MessageBox (hMainWnd, LOCALIZE (L"NoInternetConnection"), LOCALIZE (L"FatalError"), MB_ICONWARNING | MB_OK);
  390.       }
  391.  
  392.       // help menu, about
  393.       else if (wParam_loword == MENUID_HELP_ABOUT)
  394.          DialogBox_About (); // show the About dialog box
  395.  
  396.       // call the default window message processing function to keep things going
  397.       return (DefWindowProc (hWnd, message, wParam, lParam));
  398.    }
  399.  
  400.    /////////////////////////////////////////////////////
  401.    // ctrl key press or release (while not in animation)
  402.    else if ((message == WM_KEYDOWN) && (wParam == VK_CONTROL) && (animation_endtime + 1.0f < current_time))
  403.    {
  404.       ctrl_pressed = true; // remember the ctrl key is pressed
  405.  
  406.       // call the default window message processing function to keep things going
  407.       return (DefWindowProc (hWnd, message, wParam, lParam));
  408.    }
  409.    else if ((message == WM_KEYUP) && (wParam == VK_CONTROL) && (animation_endtime + 1.0f < current_time))
  410.    {
  411.       ctrl_pressed = false; // remember the ctrl key is released
  412.       rbutton_pushed = false; // remember button is released
  413.       the_scene.update = true; // update the 3D scene
  414.  
  415.       // call the default window message processing function to keep things going
  416.       return (DefWindowProc (hWnd, message, wParam, lParam));
  417.    }
  418.  
  419.    //////////////////
  420.    // MOUSE EVENTS //
  421.    //////////////////
  422.  
  423.    ////////////////////////////////////////////////////////////////////////////////////////////////
  424.    // left mouse button push
  425.    else if (message == WM_LBUTTONDOWN)
  426.    {
  427.       // are we in animation OR are mouse commands NOT allowed ?
  428.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  429.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  430.  
  431.       // are we in board closeup mode OR are we online AND do we NOT have the right to select anything ?
  432.       if (((current_distance == CLOSEUP_VIEW_DISTANCE) && (current_pitch == CLOSEUP_VIEW_PITCH))
  433.           || ((remote_player != NULL) && !remote_player->is_in_game))
  434.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default window message processing function to keep things going
  435.  
  436.       // is the ctrl key pressed (emulates a right click) ?
  437.       if (ctrl_pressed)
  438.       {
  439.          prevgui_x = GET_X_LPARAM (lParam); // remember mouse coordinates
  440.          prevgui_y = GET_Y_LPARAM (lParam);
  441.  
  442.          // if we click something, stop moving the table immediately
  443.  
  444.          // cycle through both players and change their view angles EXCEPT the opponent if he's human
  445.          for (viewer_index = 0; viewer_index < 2; viewer_index++)
  446.             if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  447.                 || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  448.                 || (viewer_index == current_viewer))
  449.             {
  450.                the_board.players[viewer_index].view_pitch = current_pitch;
  451.                the_board.players[viewer_index].view_yaw = current_yaw;
  452.             }
  453.  
  454.          rbutton_pushed = true; // remember button is clicked
  455.       }
  456.  
  457.       // call the default window message processing function to keep things going
  458.       return (DefWindowProc (hWnd, message, wParam, lParam));
  459.    }
  460.  
  461.    ////////////////////////////////////////////////////////////////////////////////////////////////
  462.    // left mouse button release
  463.    else if (message == WM_LBUTTONUP)
  464.    {
  465.       // are we in animation OR are mouse commands NOT allowed ?
  466.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  467.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  468.  
  469.       // is the ctrl key pressed (emulates a right click) ?
  470.       if (ctrl_pressed)
  471.       {
  472.          rbutton_pushed = false; // remember button is released
  473.          the_scene.update = true; // update the 3D scene
  474.  
  475.          // call the default window message processing function to keep things going
  476.          return (DefWindowProc (hWnd, message, wParam, lParam));
  477.       }
  478.  
  479.       prevgui_x = GET_X_LPARAM (lParam); // remember mouse coordinates
  480.       prevgui_y = GET_Y_LPARAM (lParam);
  481.  
  482.       // get mouse coordinates
  483.       gui_x = GET_X_LPARAM (lParam);
  484.       gui_y = GET_Y_LPARAM (lParam);
  485.  
  486.       // is the "new game" button displayed AND is the mouse hovering it ?
  487.       if ((the_scene.gui.newgamebutton.state != 0) && Button_IsHovered (&the_scene.gui.newgamebutton, gui_x, gui_y))
  488.       {
  489.          GUIBUTTON_DISABLE (the_scene.gui.newgamebutton); // hide the "new game" button
  490.          GUIBUTTON_DISABLE (the_scene.gui.opengamebutton); // hide the "open game" button
  491.          DialogBox_NewGame (); // fire up the "new game" dialog box
  492.       }
  493.  
  494.       // is the "open game" button displayed AND is the mouse hovering it ?
  495.       if ((the_scene.gui.opengamebutton.state != 0) && Button_IsHovered (&the_scene.gui.opengamebutton, gui_x, gui_y))
  496.       {
  497.          GUIBUTTON_DISABLE (the_scene.gui.newgamebutton); // hide the "new game" button
  498.          GUIBUTTON_DISABLE (the_scene.gui.opengamebutton); // hide the "open game" button
  499.          DialogBox_Load (); // fire up the "open game" dialog box
  500.       }
  501.  
  502.       // is the chat button displayed AND is the mouse hovering it ?
  503.       if ((the_scene.gui.chatbutton.state != 0) && Button_IsHovered (&the_scene.gui.chatbutton, gui_x, gui_y))
  504.       {
  505.          // find or create the corresponding interlocutor structure and fire it up
  506.          if (remote_player != NULL)
  507.             Interlocutor_FindOrCreate (remote_player->name);
  508.       }
  509.  
  510.       // is the games button displayed AND is the mouse hovering it ?
  511.       if ((the_scene.gui.gamesbutton.state != 0) && Button_IsHovered (&the_scene.gui.gamesbutton, gui_x, gui_y))
  512.          Window_Sought (); // if so, display the sought games window
  513.  
  514.       // is the people button displayed AND is the mouse hovering it ?
  515.       if ((the_scene.gui.peoplebutton.state != 0) && Button_IsHovered (&the_scene.gui.peoplebutton, gui_x, gui_y))
  516.          Window_Opponents (); // if so, display the opponents window
  517.  
  518.       // are we in board closeup mode OR are we online AND do we NOT have the right to select anything ?
  519.       if (((current_distance == CLOSEUP_VIEW_DISTANCE) && (current_pitch == CLOSEUP_VIEW_PITCH))
  520.           || ((remote_player != NULL) && !remote_player->is_in_game))
  521.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default window message processing function to keep things going
  522.  
  523.       // handle game history navigation
  524.       if ((the_scene.gui.llarrow.state != 0) && Button_IsHovered (&the_scene.gui.llarrow, gui_x, gui_y))
  525.          SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_BEGINNINGOFGAME, NULL); // send a "jump to beginning" event
  526.       else if ((the_scene.gui.larrow.state != 0) && Button_IsHovered (&the_scene.gui.larrow, gui_x, gui_y))
  527.          SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_PREVIOUSMOVE, NULL); // send a "previous move" event
  528.       else if ((the_scene.gui.rarrow.state != 0) && Button_IsHovered (&the_scene.gui.rarrow, gui_x, gui_y))
  529.          SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_NEXTMOVE, NULL); // send a "next move" event
  530.       else if ((the_scene.gui.rrarrow.state != 0) && Button_IsHovered (&the_scene.gui.rrarrow, gui_x, gui_y))
  531.          SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_CURRENTSTATEOFGAME, NULL); // send a "jump to end" event
  532.  
  533.       // is the parts selection line displayed AND is the mouse anywhere near it ?
  534.       if (the_scene.gui.is_partspick_displayed && Render_IsMouseInBox (gui_x, gui_y, 0.0f, 0.0f, 100.0f, 11.0f))
  535.       {
  536.          // for each selectable part, if the mouse is on it, mark it as selected
  537.          for (part_index = 0; part_index < 13; part_index++)
  538.             if (Render_IsMouseInBox (gui_x, gui_y, part_index * (100.0f / 13.0f), 0, 100.0f / 13.0f, 11.0f))
  539.             {
  540.                the_scene.gui.partspick_selectedpart = selectable_parts[part_index]; // mark it as selected
  541.                Audio_PlaySound (SOUNDTYPE_CLICK, 0.0f, 0.0f, 0.04f); // make a click sound at the center of the board
  542.                break; // no need to search further if one selection was found
  543.             }
  544.       }
  545.  
  546.       // if we are not allowed to select anything, don't even try
  547.       if (is_paused || (current_player->type != PLAYER_HUMAN) || (the_board.viewed_move != the_board.move_count - 1)
  548.           || ((the_board.game_state != STATE_SETUPPOSITION) && (the_board.game_state != STATE_PLAYING))
  549.           || ((remote_player != NULL) && !remote_player->is_in_game))
  550.       {
  551.          the_scene.update = true; // update the 3D scene
  552.  
  553.          // call the default window message processing function to keep things going
  554.          return (DefWindowProc (hWnd, message, wParam, lParam));
  555.       }
  556.  
  557.       // it's a single click. The user clicked on a square.
  558.  
  559.       // figure out the coordinates on table
  560.       Render_MouseToFloor (gui_x, gui_y, &board_x, &board_y);
  561.  
  562.       // translate them to board coordinates
  563.       the_board.hovered_position[0] = (int) floor ((20.0f - board_y) / 5.0f);
  564.       the_board.hovered_position[1] = 7 - (int) floor ((20.0f - board_x) / 5.0f);
  565.       highlight_endtime = 0; // stop highlighting anything
  566.  
  567.       // if it's outside the table, end the job
  568.       if (!IS_VALID_POSITION (the_board.hovered_position))
  569.       {
  570.          the_scene.update = true; // update the 3D scene
  571.  
  572.          // call the default window message processing function to keep things going
  573.          return (DefWindowProc (hWnd, message, wParam, lParam));
  574.       }
  575.  
  576.       // we clicked a valid slot on the table
  577.  
  578.       current_move = &the_board.moves[the_board.viewed_move]; // quick access to current move
  579.  
  580.       ///////////////////////////////////
  581.       // are we in parts placement mode ?
  582.       if (the_board.game_state == STATE_SETUPPOSITION)
  583.       {
  584.          // quick access to line and column
  585.          line = the_board.hovered_position[0];
  586.          column = the_board.hovered_position[1];
  587.  
  588.          // figure out the color of the part we are placing
  589.          if (the_scene.gui.partspick_selectedpart == tolower (the_scene.gui.partspick_selectedpart))
  590.             part_color = COLOR_BLACK; // black color
  591.          else
  592.             part_color = COLOR_WHITE; // white color
  593.  
  594.          // are we erasing a king ? if so, replace it at its default location
  595.          if ((current_move->slots[line][column].part == PART_KING) && (current_move->slots[line][column].color == COLOR_BLACK)
  596.              && (the_scene.gui.partspick_selectedpart != 'k'))
  597.          {
  598.             // is it ALREADY the king's default location ? if so, give up
  599.             if ((line == 7) && (column == 4))
  600.             {
  601.                Audio_PlaySound (SOUNDTYPE_ILLEGALMOVE, 17.5f - (7 - column) * 5.0f, 17.5f - line * 5.0f, 0.04f); // play the "illegal move" sound
  602.                return (DefWindowProc (hWnd, message, wParam, lParam)); // call the default window message proc
  603.             }
  604.  
  605.             Move_SetSlot (current_move, 7, 4, COLOR_BLACK, PART_KING); // replace black king
  606.          }
  607.          else if ((current_move->slots[line][column].part == PART_KING) && (current_move->slots[line][column].color == COLOR_WHITE)
  608.                   && (the_scene.gui.partspick_selectedpart != 'K'))
  609.          {
  610.             // is it ALREADY the king's default location ? if so, give up
  611.             if ((line == 0) && (column == 4))
  612.             {
  613.                Audio_PlaySound (SOUNDTYPE_ILLEGALMOVE, 17.5f - (7 - column) * 5.0f, 17.5f - line * 5.0f, 0.04f); // play the "illegal move" sound
  614.                return (DefWindowProc (hWnd, message, wParam, lParam)); // call the default window message proc
  615.             }
  616.  
  617.             Move_SetSlot (current_move, 0, 4, COLOR_WHITE, PART_KING); // replace white king
  618.          }
  619.  
  620.          // place the selected part on the board
  621.          if (tolower (the_scene.gui.partspick_selectedpart) == 'p')
  622.             Move_SetSlot (current_move, line, column, part_color, PART_PAWN); // pawn
  623.          else if (tolower (the_scene.gui.partspick_selectedpart) == 'r')
  624.             Move_SetSlot (current_move, line, column, part_color, PART_ROOK); // rook
  625.          else if (tolower (the_scene.gui.partspick_selectedpart) == 'n')
  626.             Move_SetSlot (current_move, line, column, part_color, PART_KNIGHT); // knight
  627.          else if (tolower (the_scene.gui.partspick_selectedpart) == 'b')
  628.             Move_SetSlot (current_move, line, column, part_color, PART_BISHOP); // bishop
  629.          else if (tolower (the_scene.gui.partspick_selectedpart) == 'q')
  630.             Move_SetSlot (current_move, line, column, part_color, PART_QUEEN); // queen
  631.          else if (tolower (the_scene.gui.partspick_selectedpart) == 'k')
  632.          {
  633.             // parse the board for other kings of the same color and erase them
  634.             for (index_line = 0; index_line < 8; index_line++)
  635.                for (index_column = 0; index_column < 8; index_column++)
  636.                   if ((current_move->slots[index_line][index_column].color == part_color)
  637.                       && (current_move->slots[index_line][index_column].part == PART_KING))
  638.                      memset (&current_move->slots[index_line][index_column], 0, sizeof (boardslot_t)); // erase this slot
  639.  
  640.             Move_SetSlot (current_move, line, column, part_color, PART_KING); // king
  641.          }
  642.          else
  643.             Move_SetSlot (current_move, line, column, 0, PART_NONE); // no part
  644.  
  645.          // figure out which sound to play
  646.          if (the_scene.gui.partspick_selectedpart != ' ')
  647.             Audio_PlaySound (SOUNDTYPE_MOVE, 17.5f - (7 - column) * 5.0f, 17.5f - line * 5.0f, 0.04f); // play a move sound when placing a part
  648.  
  649.          the_scene.update = true; // update the 3D scene
  650.  
  651.          // call the default window message processing function to keep things going
  652.          return (DefWindowProc (hWnd, message, wParam, lParam));
  653.       }
  654.       // end of parts placement mode
  655.       //////////////////////////////
  656.  
  657.       // does a selection NOT exist yet ?
  658.       if (!IS_VALID_POSITION (the_board.selected_position))
  659.       {
  660.          // is there a selectable part at this location ?
  661.          if ((current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].part != PART_NONE)
  662.             && (current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].color == Board_ColorToMove (&the_board)))
  663.          {
  664.             // mark the selected position as selected (and remember it)
  665.             the_board.selected_position[0] = the_board.hovered_position[0];
  666.             the_board.selected_position[1] = the_board.hovered_position[1];
  667.          }
  668.  
  669.          the_scene.update = true; // update the 3D scene
  670.  
  671.          // call the default window message processing function to keep things going
  672.          return (DefWindowProc (hWnd, message, wParam, lParam));
  673.       }
  674.  
  675.       // a selection exists already
  676.  
  677.       // is it the slot that was previously selected ? (i.e, user wants to "unselect" it)
  678.       if ((the_board.hovered_position[0] == the_board.selected_position[0]) && (the_board.hovered_position[1] == the_board.selected_position[1]))
  679.       {
  680.          // forget the selected position
  681.          the_board.selected_position[0] = -1;
  682.          the_board.selected_position[1] = -1;
  683.  
  684.          the_scene.update = true; // update the 3D scene
  685.  
  686.          // call the default window message processing function to keep things going
  687.          return (DefWindowProc (hWnd, message, wParam, lParam));
  688.       }
  689.  
  690.       // else is it another part of the same color ? (i.e, user wants to change the part he selected)
  691.       else if ((current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].part != PART_NONE)
  692.                && (current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].color == Board_ColorToMove (&the_board)))
  693.       {
  694.          // mark the selected position as selected (and remember it)
  695.          the_board.selected_position[0] = the_board.hovered_position[0];
  696.          the_board.selected_position[1] = the_board.hovered_position[1];
  697.  
  698.          the_scene.update = true; // update the 3D scene
  699.  
  700.          // call the default window message processing function to keep things going
  701.          return (DefWindowProc (hWnd, message, wParam, lParam));
  702.       }
  703.  
  704.       // else is it a possible move ?
  705.       else if ((current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].flags & FLAG_POSSIBLEMOVE)
  706.                || (current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].flags & FLAG_TAKEABLE))
  707.       {
  708.          // are we in check after the move ? (FIXME: call EP version of this func for en passant moves)
  709.          if (Move_IsColorInCheckAfterTestMove (current_move, the_board.selected_position[0], the_board.selected_position[1], the_board.hovered_position[0], the_board.hovered_position[1], Board_ColorToMove (&the_board)))
  710.          {
  711.             Audio_PlaySound (SOUNDTYPE_ILLEGALMOVE, 17.5f - (7 - the_board.hovered_position[1]) * 5.0f, 17.5f - the_board.hovered_position[0] * 5.0f, 0.04f); // play the "illegal move" sound
  712.  
  713.             the_scene.update = true; // update the 3D scene
  714.  
  715.             // call the default window message processing function to keep things going
  716.             return (DefWindowProc (hWnd, message, wParam, lParam));
  717.          }
  718.  
  719.          ////////////////////
  720.          // movement is valid
  721.  
  722.          // do it
  723.          Board_AppendMove (&the_board, the_board.selected_position[0], the_board.selected_position[1], the_board.hovered_position[0], the_board.hovered_position[1], PART_NONE, NULL);
  724.          current_move = &the_board.moves[the_board.move_count - 1]; // update current move pointer
  725.  
  726.          // are we in internet mode ?
  727.          if (remote_player != NULL)
  728.             the_board.reevaluate = false; // if so, don't reevaluate the board yet, let the server do it
  729.  
  730.          // was it a pawn being promoted ? if so, display the dialog box and wait for the reply
  731.          if ((current_move->slots[the_board.hovered_position[0]][the_board.hovered_position[1]].part == PART_PAWN)
  732.              && ((the_board.hovered_position[0] == 0) || (the_board.hovered_position[0] == 7)))
  733.             DialogBox_PawnPromotion (); // display the pawn promotion dialog box
  734.  
  735.          // else it was a normal move
  736.          else
  737.          {
  738.             Board_SetSelectedAndHovered (&the_board, -1, -1, -1, -1); // forget the hovered and selected positions
  739.             opposite_player->should_wakeup = true; // and switch players
  740.          }
  741.  
  742.          the_scene.update = true; // update the 3D scene
  743.          animation_endtime = current_time + ANIMATION_DURATION; // play animation now
  744.  
  745.          // call the default window message processing function to keep things going
  746.          return (DefWindowProc (hWnd, message, wParam, lParam));
  747.       }
  748.  
  749.       // else it's another location
  750.  
  751.       Audio_PlaySound (SOUNDTYPE_ILLEGALMOVE, 17.5f - (7 - the_board.hovered_position[1]) * 5.0f, 17.5f - the_board.hovered_position[0] * 5.0f, 0.04f); // play the "illegal move" sound
  752.  
  753.       the_scene.update = true; // update the 3D scene
  754.  
  755.       // call the default window message processing function to keep things going
  756.       return (DefWindowProc (hWnd, message, wParam, lParam));
  757.    }
  758.  
  759.    ////////////////////////////////////////////////////////////////////////////////////////////////
  760.    // right mouse button push
  761.    else if (message == WM_RBUTTONDOWN)
  762.    {
  763.       // are we in animation OR are mouse commands NOT allowed ?
  764.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  765.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  766.  
  767.       prevgui_x = GET_X_LPARAM (lParam); // remember mouse coordinates
  768.       prevgui_y = GET_Y_LPARAM (lParam);
  769.  
  770.       // if we click something, stop moving the table immediately
  771.  
  772.       // cycle through both players and change their view angles EXCEPT the opponent if he's human
  773.       for (viewer_index = 0; viewer_index < 2; viewer_index++)
  774.          if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  775.                || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  776.                || (viewer_index == current_viewer))
  777.          {
  778.             the_board.players[viewer_index].view_pitch = current_pitch;
  779.             the_board.players[viewer_index].view_yaw = current_yaw;
  780.          }
  781.  
  782.       rbutton_pushed = true; // remember button is clicked
  783.  
  784.       // call the default window message processing function to keep things going
  785.       return (DefWindowProc (hWnd, message, wParam, lParam));
  786.    }
  787.  
  788.    ////////////////////////////////////////////////////////////////////////////////////////////////
  789.    // right mouse button release
  790.    else if (message == WM_RBUTTONUP)
  791.    {
  792.       // are we in animation OR are mouse commands NOT allowed ?
  793.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  794.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  795.  
  796.       rbutton_pushed = false; // remember button is released
  797.       the_scene.update = true; // update the 3D scene
  798.  
  799.       // call the default window message processing function to keep things going
  800.       return (DefWindowProc (hWnd, message, wParam, lParam));
  801.    }
  802.  
  803.    ////////////////////////////////////////////////////////////////////////////////////////////////
  804.    // left mouse button DOUBLE-click
  805.    else if (message == WM_LBUTTONDBLCLK)
  806.    {
  807.       // are we in animation OR are mouse commands NOT allowed ?
  808.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  809.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  810.  
  811.       // get mouse coordinates
  812.       gui_x = GET_X_LPARAM (lParam);
  813.       gui_y = GET_Y_LPARAM (lParam);
  814.  
  815.       // are we in game and did we click the move comments area ?
  816.       if ((the_board.game_state >= STATE_PLAYING) && (the_board.viewed_move > 0) && Render_IsMouseInBox (gui_x, gui_y, 10.0f, 0.0f, 80.0f, 10.0f))
  817.       {
  818.          DialogBox_Comment (); // fire up the comment dialog box
  819.          return (DefWindowProc (hWnd, message, wParam, lParam)); // call the default window message processing function to keep things going
  820.       }
  821.  
  822.       // call the default window message processing function to keep things going
  823.       return (DefWindowProc (hWnd, message, wParam, lParam));
  824.    }
  825.  
  826.    ////////////////////////////////////////////////////////////////////////////////////////////////
  827.    // mouse move (while not in animation)
  828.    else if (message == WM_MOUSEMOVE)
  829.    {
  830.       // are we in animation OR are mouse commands NOT allowed ?
  831.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  832.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  833.  
  834.       // get mouse coordinates
  835.       gui_x = GET_X_LPARAM (lParam);
  836.       gui_y = GET_Y_LPARAM (lParam);
  837.  
  838.       // handle button update status
  839.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.llarrow, gui_x, gui_y);
  840.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.larrow, gui_x, gui_y);
  841.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.rarrow, gui_x, gui_y);
  842.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.rrarrow, gui_x, gui_y);
  843.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.newgamebutton, gui_x, gui_y);
  844.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.opengamebutton, gui_x, gui_y);
  845.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.chatbutton, gui_x, gui_y);
  846.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.gamesbutton, gui_x, gui_y);
  847.       the_scene.update |= Button_UpdateHoverState (&the_scene.gui.peoplebutton, gui_x, gui_y);
  848.  
  849.       // are we in board closeup mode OR are we online AND do we NOT have the right to select anything ?
  850.       if (((current_distance == CLOSEUP_VIEW_DISTANCE) && (current_pitch == CLOSEUP_VIEW_PITCH))
  851.           || ((remote_player != NULL) && !remote_player->is_in_game))
  852.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default window message processing function to keep things going
  853.  
  854.       // is the parts selection line displayed AND is the mouse anywhere in it ?
  855.       if (the_scene.gui.is_partspick_displayed && Render_IsMouseInBox (gui_x, gui_y, 0.0f, 0.0f, 100.0f, 11.0f))
  856.       {
  857.          // for each selectable part...
  858.          for (part_index = 0; part_index < 13; part_index++)
  859.          {
  860.             // is the mouse hovering it ?
  861.             if (Render_IsMouseInBox (gui_x, gui_y, part_index * (100.0f / 13.0f), 0, 100.0f / 13.0f, 11.0f))
  862.             {
  863.                // was it NOT hovered before ?
  864.                if (the_scene.gui.partspick_hoveredpart != selectable_parts[part_index])
  865.                {
  866.                   the_scene.gui.partspick_hoveredpart = selectable_parts[part_index]; // mark it as hovered
  867.                   the_scene.update = true; // update the scene
  868.                }
  869.             }
  870.  
  871.             // else was it hovered before ?
  872.             else if (the_scene.gui.partspick_hoveredpart == selectable_parts[part_index])
  873.             {
  874.                the_scene.gui.partspick_hoveredpart = 0; // clear the hovered part
  875.                the_scene.update = true; // update the scene
  876.             }
  877.          }
  878.       }
  879.       else
  880.          the_scene.gui.partspick_hoveredpart = 0; // clear the hovered part
  881.  
  882.       // if right button was clicked, compute new pitch and yaw
  883.       if (rbutton_pushed)
  884.       {
  885.          // cycle through both players and change their view angles EXCEPT the opponent if he's human
  886.          for (viewer_index = 0; viewer_index < 2; viewer_index++)
  887.             if ((the_board.players[viewer_index].type == PLAYER_COMPUTER)
  888.                 || (the_board.players[viewer_index].type == PLAYER_INTERNET)
  889.                 || (viewer_index == current_viewer))
  890.             {
  891.                the_board.players[viewer_index].view_pitch += (gui_y - prevgui_y) * 0.3f;
  892.                if (the_board.players[viewer_index].view_pitch < MIN_VIEW_PITCH)
  893.                   the_board.players[viewer_index].view_pitch = MIN_VIEW_PITCH; // wrap angles around so that they
  894.                if (the_board.players[viewer_index].view_pitch > MAX_VIEW_PITCH)
  895.                   the_board.players[viewer_index].view_pitch = MAX_VIEW_PITCH; // stay in the min-max pitch bounds
  896.  
  897.                the_board.players[viewer_index].view_yaw += (gui_x - prevgui_x) * 0.3f;
  898.                the_board.players[viewer_index].view_yaw = WrapAngle (the_board.players[viewer_index].view_yaw);
  899.  
  900.                // save these as the new custom angles
  901.                the_board.players[viewer_index].custom_pitch = the_board.players[viewer_index].view_pitch;
  902.                the_board.players[viewer_index].custom_yaw = the_board.players[viewer_index].view_yaw;
  903.  
  904.                // when moving the table around, jump to ideal angles immediately
  905.                current_pitch = the_board.players[viewer_index].view_pitch;
  906.                current_yaw = the_board.players[viewer_index].view_yaw;
  907.             }
  908.  
  909.          the_scene.update = true; // button was clicked, update the 3D scene
  910.       }
  911.  
  912.       // else it's just the mouse wandering around ; have we the right to select something ?
  913.       else if ((the_board.viewed_move == the_board.move_count - 1) && (current_player->type == PLAYER_HUMAN) && (highlight_endtime < current_time))
  914.       {
  915.          // save the old positions
  916.          prev_hovered_position[0] = the_board.hovered_position[0];
  917.          prev_hovered_position[1] = the_board.hovered_position[1];
  918.  
  919.          // figure out the coordinates on table
  920.          Render_MouseToFloor (gui_x, gui_y, &board_x, &board_y);
  921.  
  922.          // translate them to board coordinates
  923.          the_board.hovered_position[0] = (int) floor ((20.0f - board_y) / 5.0f);
  924.          the_board.hovered_position[1] = 7 - (int) floor ((20.0f - board_x) / 5.0f);
  925.  
  926.          // do they differ from last time ?
  927.          if ((the_board.hovered_position[0] != prev_hovered_position[0]) || (the_board.hovered_position[1] != prev_hovered_position[1]))
  928.             the_scene.update = true; // if so, update scene
  929.       }
  930.  
  931.       // has the user the right to leave a comment AND is there no comment yet ?
  932.       if ((the_board.game_state >= STATE_PLAYING) && (the_board.viewed_move > 0)
  933.           && ((the_board.moves[the_board.viewed_move].comment == NULL) || (the_board.moves[the_board.viewed_move].comment[0] == 0)))
  934.       {
  935.          // is the mouse above the comments zone ? if so, display a dimmed hint text
  936.          if (Render_IsMouseInBox (gui_x, gui_y, 30.0f, 0.0f, 40.0f, 10.0f))
  937.          {
  938.             if (!the_scene.gui.comment_text.is_displayed)
  939.             {
  940.                Scene_UpdateText (&the_scene.gui.comment_text, RGBA_TO_RGBACOLOR (255, 255, 255, 127), DURATION_INFINITE, false, L"\n\n%s", LOCALIZE (L"DoubleClickToEnterComment"));
  941.                the_scene.update = true; // and update the scene
  942.             }
  943.          }
  944.          else
  945.          {
  946.             if (the_scene.gui.comment_text.is_displayed)
  947.             {
  948.                the_scene.gui.comment_text.is_displayed = false; // if not, erase the hint text
  949.                the_scene.update = true; // and update the scene
  950.             }
  951.          }
  952.       }
  953.  
  954.       // remember these coordinates for next time
  955.       prevgui_x = gui_x;
  956.       prevgui_y = gui_y;
  957.  
  958.       // call the default window message processing function to keep things going
  959.       return (DefWindowProc (hWnd, message, wParam, lParam));
  960.    }
  961.  
  962.    ////////////////////////////////////////////////////////////////////////////////////////////////
  963.    // mouse scroll
  964.    else if (message == WM_MOUSEWHEEL)
  965.    {
  966.       // are we in animation OR are mouse commands NOT allowed ?
  967.       if ((animation_endtime + 1.0f >= current_time) || (command_ignoretime >= current_time))
  968.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default message proc to keep things going
  969.  
  970.       // are we in board closeup mode OR are we online AND do we NOT have the right to select anything ?
  971.       if (((current_distance == CLOSEUP_VIEW_DISTANCE) && (current_pitch == CLOSEUP_VIEW_PITCH))
  972.           || ((remote_player != NULL) && !remote_player->is_in_game))
  973.          return (DefWindowProc (hWnd, message, wParam, lParam)); // if so, call the default window message processing function to keep things going
  974.  
  975.       // get mouse coordinates (strangely enough, the WM_MOUSEWHEEL message outputs ABSOLUTE coordinates, and we need to convert them...)
  976.       point.x = GET_X_LPARAM (lParam);
  977.       point.y = GET_Y_LPARAM (lParam);
  978.       ScreenToClient (hWnd, &point);
  979.       gui_x = point.x;
  980.       gui_y = point.y;
  981.  
  982.       // is a game history displayed and are we (roughly) hovering this area ?
  983.       if (the_scene.gui.history_text.is_displayed && Render_IsMouseInBox (gui_x, gui_y, 90.0f, 10.0f, 10.0f, 40.0f))
  984.       {
  985.          // we want to scroll through the game history rather than zooming in/out. Scroll up or scroll down ?
  986.          if ((GET_WHEEL_DELTA_WPARAM (wParam) > 0) && (the_scene.gui.larrow.state != 0))
  987.             SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_PREVIOUSMOVE, NULL); // send a "previous move" event
  988.          else if ((GET_WHEEL_DELTA_WPARAM (wParam) < 0) && (the_scene.gui.rarrow.state != 0))
  989.             SendMessage (hWnd, WM_COMMAND, MENUID_CHESSBOARD_NEXTMOVE, NULL); // send a "next move" event
  990.  
  991.          return (DefWindowProc (hWnd, message, wParam, lParam)); // and call the default window message processing function to keep things going
  992.       }
  993.  
  994.       // we want to zoom in/out of the scene. Scroll up or scroll down ?
  995.       if (GET_WHEEL_DELTA_WPARAM (wParam) > 0)
  996.          the_board.players[current_viewer].view_distance = max (MIN_VIEW_DISTANCE, the_board.players[current_viewer].view_distance - 2.0f);
  997.       else if (GET_WHEEL_DELTA_WPARAM (wParam) < 0)
  998.          the_board.players[current_viewer].view_distance = min (MAX_VIEW_DISTANCE, the_board.players[current_viewer].view_distance + 2.0f);
  999.  
  1000.       // save this as the new custom distance
  1001.       the_board.players[current_viewer].custom_distance = the_board.players[current_viewer].view_distance;
  1002.  
  1003.       // when moving the table around, jump to ideal angles immediately
  1004.       current_distance = the_board.players[current_viewer].view_distance;
  1005.  
  1006.       the_scene.update = true; // update the 3D scene
  1007.  
  1008.       // call the default window message processing function to keep things going
  1009.       return (DefWindowProc (hWnd, message, wParam, lParam));
  1010.    }
  1011.  
  1012.    ////////////////////////////////////////////////////////////////////////////////////////////////
  1013.    // keyboard release
  1014.    else if (message == WM_CHAR)
  1015.    {
  1016.       // are we in position setup mode ?
  1017.       if (the_board.game_state == STATE_SETUPPOSITION)
  1018.       {
  1019.          // is it the enter key ? if so, exit setup mode and start playing
  1020.          if (wParam == L'\r')
  1021.          {
  1022.             current_move = &the_board.moves[the_board.viewed_move]; // quick access to current move
  1023.  
  1024.             // make sure there is at least one king of each color (i.e. two kings)
  1025.             part_index = 0;
  1026.             for (line = 0; line < 8; line++)
  1027.                for (column = 0; column < 8; column++)
  1028.                   if (current_move->slots[line][column].part == PART_KING)
  1029.                      part_index++; // there's one king more on this board
  1030.             if (part_index != 2)
  1031.                return (DefWindowProc (hWnd, message, wParam, lParam)); // when at least one king is missing, we just can't leave edition mode
  1032.  
  1033.             // (in)validate the castling positions
  1034.             if ((current_move->slots[0][0].color == COLOR_WHITE) && (current_move->slots[0][0].part == PART_ROOK)
  1035.                 && (current_move->slots[0][4].color == COLOR_WHITE) && (current_move->slots[0][4].part == PART_KING))
  1036.                current_move->sides[COLOR_WHITE].longcastle_allowed = true; // white castling queenside allowed
  1037.             else
  1038.                current_move->sides[COLOR_WHITE].longcastle_allowed = false; // white castling queenside no longer possible
  1039.             if ((current_move->slots[0][7].color == COLOR_WHITE) && (current_move->slots[0][7].part == PART_ROOK)
  1040.                 && (current_move->slots[0][4].color == COLOR_WHITE) && (current_move->slots[0][4].part == PART_KING))
  1041.                current_move->sides[COLOR_WHITE].shortcastle_allowed = true; // white castling kingside allowed
  1042.             else
  1043.                current_move->sides[COLOR_WHITE].shortcastle_allowed = false; // white castling kingside no longer possible
  1044.             if ((current_move->slots[7][0].color == COLOR_BLACK) && (current_move->slots[7][0].part == PART_ROOK)
  1045.                 && (current_move->slots[7][4].color == COLOR_BLACK) && (current_move->slots[7][4].part == PART_KING))
  1046.                current_move->sides[COLOR_BLACK].longcastle_allowed = true; // white castling queenside allowed
  1047.             else
  1048.                current_move->sides[COLOR_BLACK].longcastle_allowed = false; // white castling queenside no longer possible
  1049.             if ((current_move->slots[7][7].color == COLOR_BLACK) && (current_move->slots[7][7].part == PART_ROOK)
  1050.                 && (current_move->slots[7][4].color == COLOR_BLACK) && (current_move->slots[7][4].part == PART_KING))
  1051.                current_move->sides[COLOR_BLACK].shortcastle_allowed = true; // white castling kingside allowed
  1052.             else
  1053.                current_move->sides[COLOR_BLACK].shortcastle_allowed = false; // white castling kingside no longer possible
  1054.  
  1055.             current_move->color = COLOR_BLACK; // so that game starts with white
  1056.  
  1057.             // validate this board in Forsyth-Edwards Notation and reset it
  1058.             Move_DescribeInFEN (current_move);
  1059.             wcscpy_s (fen_string, WCHAR_SIZEOF (fen_string), current_move->fen_string); // have a copy of fen string
  1060.             Board_Reset (&the_board, fen_string);
  1061.  
  1062.             the_board.game_state = STATE_PLAYING; // start the game now
  1063.             the_board.reevaluate = true; // evaluate board again
  1064.  
  1065.             the_scene.gui.central_text.disappear_time = current_time + 1.0f; // fade out help text now (FIXME: ugly)
  1066.             the_scene.update = true; // update the 3D scene
  1067.  
  1068.             // call the default window message processing function to keep things going
  1069.             return (DefWindowProc (hWnd, message, wParam, lParam));
  1070.          }
  1071.       }
  1072.  
  1073.       // else are we in internet mode ?
  1074.       else if (remote_player != NULL)
  1075.       {
  1076.          entered_ccreply = &the_scene.gui.entered_ccreply; // quick access to entered ccreply
  1077.          local_player = Player_FindByType (PLAYER_HUMAN); // quick access to local player
  1078.          if (local_player == NULL)
  1079.             return (DefWindowProc (hWnd, message, wParam, lParam)); // theoretically impossible condition, but better be sure
  1080.          if (selected_chatterchannel == NULL)
  1081.             return (DefWindowProc (hWnd, message, wParam, lParam)); // theoretically impossible condition, but better be sure
  1082.  
  1083.          // are we NOT entering text yet ?
  1084.          if (!the_scene.gui.is_entering_text)
  1085.          {
  1086.             // is it the space bar ?
  1087.             if (wParam == L' ')
  1088.             {
  1089.                the_scene.gui.is_entering_text = true; // remember we are entering text
  1090.  
  1091.                // reset the entered text buffer
  1092.                entered_ccreply->text = (wchar_t *) SAFE_malloc (1, sizeof (wchar_t), false);
  1093.                entered_ccreply->text[0] = 0; // only the null terminator will fit
  1094.                entered_ccreply->text_length = 0; // and set its length to zero
  1095.             }
  1096.          }
  1097.  
  1098.          // else we are currently in text entering mode
  1099.          else
  1100.          {
  1101.             // is the typed character a printable character ?
  1102.             if (iswprint (wParam))
  1103.             {
  1104.                // if so, reallocate space in the typed buffer (include null terminator)
  1105.                entered_ccreply->text = (wchar_t *) SAFE_realloc (entered_ccreply->text, entered_ccreply->text_length + 1, entered_ccreply->text_length + 1 + 1, sizeof (wchar_t), false);
  1106.                swprintf_s (&entered_ccreply->text[entered_ccreply->text_length], 1 + 1, L"%c", wParam); // append character
  1107.                entered_ccreply->text_length++; // buffer holds now one character more
  1108.             }
  1109.  
  1110.             // else is the typed character a backspace AND is there text to erase ?
  1111.             else if ((wParam == 0x08) && (entered_ccreply->text_length > 0))
  1112.             {
  1113.                // if so, reallocate space in the typed buffer (include null terminator)
  1114.                entered_ccreply->text = (wchar_t *) SAFE_realloc (entered_ccreply->text, entered_ccreply->text_length + 1, entered_ccreply->text_length + 1 - 1, sizeof (wchar_t), false);
  1115.                entered_ccreply->text[entered_ccreply->text_length - 1] = 0; // backspace, delete one character
  1116.                entered_ccreply->text_length--; // buffer holds now one character less
  1117.             }
  1118.  
  1119.             // else is the typed character the escape key ?
  1120.             else if (wParam == 0x1b)
  1121.             {
  1122.                SAFE_free ((void **) &entered_ccreply->text); // reset the entered text buffer
  1123.                entered_ccreply->text_length = 0; // and set its length to zero
  1124.                the_scene.gui.is_entering_text = false; // and exit from the text entering mode
  1125.             }
  1126.  
  1127.             // else is the typed character the enter key ?
  1128.             else if (wParam == 0x0d)
  1129.                the_scene.gui.is_entering_text = false; // enter, exit from the text entering mode (this will validate our reply)
  1130.  
  1131.             // else it's an illegal character
  1132.             else
  1133.                Audio_PlaySound (SOUNDTYPE_ILLEGALMOVE, 0.0f, 0.0f, 0.04f); // illegal character, beep the illegal move sound at the center of the board
  1134.          }
  1135.  
  1136.          the_scene.update = true; // update the 3D scene
  1137.  
  1138.          // call the default window message processing function to keep things going
  1139.          return (DefWindowProc (hWnd, message, wParam, lParam));
  1140.       }
  1141.    }
  1142.  
  1143.    ////////////////////////////////////////////////////////////////////////////////////////////////
  1144.    // mouse move outside the window
  1145.    else if (message == WM_NCMOUSEMOVE)
  1146.    {
  1147.       rbutton_pushed = false; // remember right button is released
  1148.  
  1149.       // call the default window message processing function to keep things going
  1150.       return (DefWindowProc (hWnd, message, wParam, lParam));
  1151.    }
  1152.  
  1153.    ////////////////////////////////////////////////////////////////////////////////////////////////
  1154.    // window repaint
  1155.    else if (message == WM_PAINT)
  1156.    {
  1157.       the_scene.update = true; // update the 3D scene
  1158.  
  1159.       // call the default window message processing function to keep things going
  1160.       return (DefWindowProc (hWnd, message, wParam, lParam));
  1161.    }
  1162.  
  1163.    // call the default window message processing function to keep things going
  1164.    return (DefWindowProc (hWnd, message, wParam, lParam));
  1165. }
  1166.  
  1167.  
  1168. static bool Button_IsHovered (guibutton_t *button, int gui_x, int gui_y)
  1169. {
  1170.    // handy wrapper that returns whether a particular GUI button is hovered when the mouse is at the given coordinates
  1171.  
  1172.    return (Render_IsMouseInBox (gui_x, gui_y, button->left, button->top, button->width, button->height));
  1173. }
  1174.  
  1175.  
  1176. static bool Button_UpdateHoverState (guibutton_t *button, int gui_x, int gui_y)
  1177. {
  1178.    // this function updates the hover state of a GUI button, and returns TRUE if the
  1179.    // scene needs to be updated, FALSE otherwise.
  1180.  
  1181.    // is the button displayed ?
  1182.    if (button->state != 0)
  1183.    {
  1184.       // is the mouse hovering it ?
  1185.       if (Render_IsMouseInBox (gui_x, gui_y, button->left, button->top, button->width, button->height))
  1186.       {
  1187.          // was it NOT hovered before ?
  1188.          if (button->state != 2)
  1189.          {
  1190.             button->state = 2; // mark it as hovered
  1191.             return (true); // return TRUE so as to update the scene
  1192.          }
  1193.       }
  1194.  
  1195.       // else was it hovered before ?
  1196.       else if (button->state == 2)
  1197.       {
  1198.          button->state = 1; // else mark it as not hovered
  1199.          return (true); // return TRUE so as to update the scene
  1200.       }
  1201.    }
  1202.  
  1203.    return (false); // no need to update the scene
  1204. }
  1205.