windows.c

   1 /*
   2  * windows.c: Windows front end for my puzzle collection.
   3  *
   4  * TODO:
   5  *
   6  *  - Figure out what to do if a puzzle requests a size bigger than
   7  *    the screen will take. In principle we could put scrollbars in
   8  *    the window, although that would be pretty horrid. Another
   9  *    option is to detect in advance that this will be a problem -
  10  *    we can probably tell this using midend_size() before actually
  11  *    generating the puzzle - and simply refuse to do it.
  12  */
  13
  14 #include <windows.h>
  15 #include <commctrl.h>
  16
  17 #include <stdio.h>
  18 #include <assert.h>
  19 #include <ctype.h>
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <time.h>
  23
  24 #include "puzzles.h"
  25
  26 #define IDM_NEW       0x0010
  27 #define IDM_RESTART   0x0020
  28 #define IDM_UNDO      0x0030
  29 #define IDM_REDO      0x0040
  30 #define IDM_QUIT      0x0050
  31 #define IDM_CONFIG    0x0060
  32 #define IDM_SEED      0x0070
  33 #define IDM_HELPC     0x0080
  34 #define IDM_GAMEHELP  0x0090
  35 #define IDM_PRESETS   0x0100
  36
  37 #define HELP_FILE_NAME  "puzzles.hlp"
  38 #define HELP_CNT_NAME   "puzzles.cnt"
  39
  40 #ifdef DEBUG
  41 static FILE *debug_fp = NULL;
  42 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
  43 static int debug_got_console = 0;
  44
  45 void dputs(char *buf)
  46 {
  47     DWORD dw;
  48
  49     if (!debug_got_console) {
  50         if (AllocConsole()) {
  51             debug_got_console = 1;
  52             debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
  53         }
  54     }
  55     if (!debug_fp) {
  56         debug_fp = fopen("debug.log", "w");
  57     }
  58
  59     if (debug_hdl != INVALID_HANDLE_VALUE) {
  60         WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
  61     }
  62     fputs(buf, debug_fp);
  63     fflush(debug_fp);
  64 }
  65
  66 void debug_printf(char *fmt, ...)
  67 {
  68     char buf[4096];
  69     va_list ap;
  70
  71     va_start(ap, fmt);
  72     vsprintf(buf, fmt, ap);
  73     dputs(buf);
  74     va_end(ap);
  75 }
  76
  77 #define debug(x) (debug_printf x)
  78
  79 #else
  80
  81 #define debug(x)
  82
  83 #endif
  84
  85 struct font {
  86     HFONT font;
  87     int type;
  88     int size;
  89 };
  90
  91 struct cfg_aux {
  92     int ctlid;
  93 };
  94
  95 struct frontend {
  96     midend_data *me;
  97     HWND hwnd, statusbar, cfgbox;
  98     HINSTANCE inst;
  99     HBITMAP bitmap, prevbm;
 100     HDC hdc_bm;
 101     COLORREF *colours;
 102     HBRUSH *brushes;
 103     HPEN *pens;
 104     HRGN clip;
 105     UINT timer;
 106     DWORD timer_last_tickcount;
 107     int npresets;
 108     game_params **presets;
 109     struct font *fonts;
 110     int nfonts, fontsize;
 111     config_item *cfg;
 112     struct cfg_aux *cfgaux;
 113     int cfg_which, cfg_done;
 114     HFONT cfgfont;
 115     char *help_path;
 116     int help_has_contents;
 117 };
 118
 119 void fatal(char *fmt, ...)
 120 {
 121     char buf[2048];
 122     va_list ap;
 123
 124     va_start(ap, fmt);
 125     vsprintf(buf, fmt, ap);
 126     va_end(ap);
 127
 128     MessageBox(NULL, buf, "Fatal error", MB_ICONEXCLAMATION | MB_OK);
 129
 130     exit(1);
 131 }
 132
 133 void get_random_seed(void **randseed, int *randseedsize)
 134 {
 135     time_t *tp = snew(time_t);
 136     time(tp);
 137     *randseed = (void *)tp;
 138     *randseedsize = sizeof(time_t);
 139 }
 140
 141 void status_bar(frontend *fe, char *text)
 142 {
 143     SetWindowText(fe->statusbar, text);
 144 }
 145
 146 void frontend_default_colour(frontend *fe, float *output)
 147 {
 148     DWORD c = GetSysColor(COLOR_MENU); /* ick */
 149
 150     output[0] = (float)(GetRValue(c) / 255.0);
 151     output[1] = (float)(GetGValue(c) / 255.0);
 152     output[2] = (float)(GetBValue(c) / 255.0);
 153 }
 154
 155 void clip(frontend *fe, int x, int y, int w, int h)
 156 {
 157     if (!fe->clip) {
 158         fe->clip = CreateRectRgn(0, 0, 1, 1);
 159         GetClipRgn(fe->hdc_bm, fe->clip);
 160     }
 161
 162     IntersectClipRect(fe->hdc_bm, x, y, x+w, y+h);
 163 }
 164
 165 void unclip(frontend *fe)
 166 {
 167     assert(fe->clip);
 168     SelectClipRgn(fe->hdc_bm, fe->clip);
 169 }
 170
 171 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 172                int align, int colour, char *text)
 173 {
 174     int i;
 175
 176     /*
 177      * Find or create the font.
 178      */
 179     for (i = 0; i < fe->nfonts; i++)
 180         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 181             break;
 182
 183     if (i == fe->nfonts) {
 184         if (fe->fontsize <= fe->nfonts) {
 185             fe->fontsize = fe->nfonts + 10;
 186             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 187         }
 188
 189         fe->nfonts++;
 190
 191         fe->fonts[i].type = fonttype;
 192         fe->fonts[i].size = fontsize;
 193
 194         /*
 195          * FIXME: Really I should make at least _some_ effort to
 196          * pick the correct font.
 197          */
 198         fe->fonts[i].font = CreateFont(-fontsize, 0, 0, 0, 0,
 199                                        FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 200                                        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 201                                        DEFAULT_QUALITY,
 202                                        (fonttype == FONT_FIXED ?
 203                                         FIXED_PITCH | FF_DONTCARE :
 204                                         VARIABLE_PITCH | FF_SWISS),
 205                                        NULL);
 206     }
 207
 208     /*
 209      * Position and draw the text.
 210      */
 211     {
 212         HFONT oldfont;
 213         TEXTMETRIC tm;
 214         SIZE size;
 215
 216         oldfont = SelectObject(fe->hdc_bm, fe->fonts[i].font);
 217         if (GetTextMetrics(fe->hdc_bm, &tm)) {
 218             if (align & ALIGN_VCENTRE)
 219                 y -= (tm.tmAscent+tm.tmDescent)/2;
 220             else
 221                 y -= tm.tmAscent;
 222         }
 223         if (GetTextExtentPoint32(fe->hdc_bm, text, strlen(text), &size)) {
 224             if (align & ALIGN_HCENTRE)
 225                 x -= size.cx / 2;
 226             else if (align & ALIGN_HRIGHT)
 227                 x -= size.cx;
 228         }
 229         SetBkMode(fe->hdc_bm, TRANSPARENT);
 230         SetTextColor(fe->hdc_bm, fe->colours[colour]);
 231         TextOut(fe->hdc_bm, x, y, text, strlen(text));
 232         SelectObject(fe->hdc_bm, oldfont);
 233     }
 234 }
 235
 236 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour)
 237 {
 238     if (w == 1 && h == 1) {
 239         /*
 240          * Rectangle() appears to get uppity if asked to draw a 1x1
 241          * rectangle, presumably on the grounds that that's beneath
 242          * its dignity and you ought to be using SetPixel instead.
 243          * So I will.
 244          */
 245         SetPixel(fe->hdc_bm, x, y, fe->colours[colour]);
 246     } else {
 247         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 248         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 249         Rectangle(fe->hdc_bm, x, y, x+w, y+h);
 250         SelectObject(fe->hdc_bm, oldbrush);
 251         SelectObject(fe->hdc_bm, oldpen);
 252     }
 253 }
 254
 255 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour)
 256 {
 257     HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 258     MoveToEx(fe->hdc_bm, x1, y1, NULL);
 259     LineTo(fe->hdc_bm, x2, y2);
 260     SetPixel(fe->hdc_bm, x2, y2, fe->colours[colour]);
 261     SelectObject(fe->hdc_bm, oldpen);
 262 }
 263
 264 void draw_polygon(frontend *fe, int *coords, int npoints,
 265                   int fill, int colour)
 266 {
 267     POINT *pts = snewn(npoints+1, POINT);
 268     int i;
 269
 270     for (i = 0; i <= npoints; i++) {
 271         int j = (i < npoints ? i : 0);
 272         pts[i].x = coords[j*2];
 273         pts[i].y = coords[j*2+1];
 274     }
 275
 276     if (fill) {
 277         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 278         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 279         Polygon(fe->hdc_bm, pts, npoints);
 280         SelectObject(fe->hdc_bm, oldbrush);
 281         SelectObject(fe->hdc_bm, oldpen);
 282     } else {
 283         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 284         Polyline(fe->hdc_bm, pts, npoints+1);
 285         SelectObject(fe->hdc_bm, oldpen);
 286     }
 287
 288     sfree(pts);
 289 }
 290
 291 void start_draw(frontend *fe)
 292 {
 293     HDC hdc_win;
 294     hdc_win = GetDC(fe->hwnd);
 295     fe->hdc_bm = CreateCompatibleDC(hdc_win);
 296     fe->prevbm = SelectObject(fe->hdc_bm, fe->bitmap);
 297     ReleaseDC(fe->hwnd, hdc_win);
 298     fe->clip = NULL;
 299     SetMapMode(fe->hdc_bm, MM_TEXT);
 300 }
 301
 302 void draw_update(frontend *fe, int x, int y, int w, int h)
 303 {
 304     RECT r;
 305
 306     r.left = x;
 307     r.top = y;
 308     r.right = x + w;
 309     r.bottom = y + h;
 310
 311     InvalidateRect(fe->hwnd, &r, FALSE);
 312 }
 313
 314 void end_draw(frontend *fe)
 315 {
 316     SelectObject(fe->hdc_bm, fe->prevbm);
 317     DeleteDC(fe->hdc_bm);
 318     if (fe->clip) {
 319         DeleteObject(fe->clip);
 320         fe->clip = NULL;
 321     }
 322 }
 323
 324 void deactivate_timer(frontend *fe)
 325 {
 326     KillTimer(fe->hwnd, fe->timer);
 327     fe->timer = 0;
 328 }
 329
 330 void activate_timer(frontend *fe)
 331 {
 332     if (!fe->timer) {
 333         fe->timer = SetTimer(fe->hwnd, fe->timer, 20, NULL);
 334         fe->timer_last_tickcount = GetTickCount();
 335     }
 336 }
 337
 338 /*
 339  * See if we can find a help file.
 340  */
 341 static void find_help_file(frontend *fe)
 342 {
 343     char b[2048], *p, *q, *r;
 344     FILE *fp;
 345     if (!fe->help_path) {
 346         GetModuleFileName(NULL, b, sizeof(b) - 1);
 347         r = b;
 348         p = strrchr(b, '\\');
 349         if (p && p >= r) r = p+1;
 350         q = strrchr(b, ':');
 351         if (q && q >= r) r = q+1;
 352         strcpy(r, HELP_FILE_NAME);
 353         if ( (fp = fopen(b, "r")) != NULL) {
 354             fe->help_path = dupstr(b);
 355             fclose(fp);
 356         } else
 357             fe->help_path = NULL;
 358         strcpy(r, HELP_CNT_NAME);
 359         if ( (fp = fopen(b, "r")) != NULL) {
 360             fe->help_has_contents = TRUE;
 361             fclose(fp);
 362         } else
 363             fe->help_has_contents = FALSE;
 364     }
 365 }
 366
 367 static frontend *new_window(HINSTANCE inst, char *game_id, char **error)
 368 {
 369     frontend *fe;
 370     int x, y;
 371     RECT r, sr;
 372     HDC hdc;
 373
 374     fe = snew(frontend);
 375
 376     fe->me = midend_new(fe, &thegame);
 377
 378     if (game_id) {
 379         *error = midend_game_id(fe->me, game_id, FALSE);
 380         if (*error) {
 381             midend_free(fe->me);
 382             sfree(fe);
 383             return NULL;
 384         }
 385     }
 386
 387     fe->help_path = NULL;
 388     find_help_file(fe);
 389
 390     fe->inst = inst;
 391     midend_new_game(fe->me);
 392     midend_size(fe->me, &x, &y);
 393
 394     fe->timer = 0;
 395
 396     fe->fonts = NULL;
 397     fe->nfonts = fe->fontsize = 0;
 398
 399     {
 400         int i, ncolours;
 401         float *colours;
 402
 403         colours = midend_colours(fe->me, &ncolours);
 404
 405         fe->colours = snewn(ncolours, COLORREF);
 406         fe->brushes = snewn(ncolours, HBRUSH);
 407         fe->pens = snewn(ncolours, HPEN);
 408
 409         for (i = 0; i < ncolours; i++) {
 410             fe->colours[i] = RGB(255 * colours[i*3+0],
 411                                  255 * colours[i*3+1],
 412                                  255 * colours[i*3+2]);
 413             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
 414             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
 415         }
 416     }
 417
 418     r.left = r.top = 0;
 419     r.right = x;
 420     r.bottom = y;
 421     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 422                        (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 423                        TRUE, 0);
 424
 425     fe->hwnd = CreateWindowEx(0, thegame.name, thegame.name,
 426                               WS_OVERLAPPEDWINDOW &~
 427                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
 428                               CW_USEDEFAULT, CW_USEDEFAULT,
 429                               r.right - r.left, r.bottom - r.top,
 430                               NULL, NULL, inst, NULL);
 431
 432     {
 433         HMENU bar = CreateMenu();
 434         HMENU menu = CreateMenu();
 435
 436         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
 437         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
 438         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
 439         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Specific...");
 440
 441         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
 442             thegame.can_configure) {
 443             HMENU sub = CreateMenu();
 444             int i;
 445
 446             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
 447
 448             fe->presets = snewn(fe->npresets, game_params *);
 449
 450             for (i = 0; i < fe->npresets; i++) {
 451                 char *name;
 452
 453                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
 454
 455                 /*
 456                  * FIXME: we ought to go through and do something
 457                  * with ampersands here.
 458                  */
 459
 460                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
 461             }
 462
 463             if (thegame.can_configure) {
 464                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
 465             }
 466         }
 467
 468         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 469         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
 470         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
 471         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 472         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
 473         if (fe->help_path) {
 474             HMENU hmenu = CreateMenu();
 475             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)hmenu, "Help");
 476             AppendMenu(hmenu, MF_ENABLED, IDM_HELPC, "Contents");
 477             if (thegame.winhelp_topic) {
 478                 char *item;
 479                 assert(thegame.name);
 480                 item = snewn(9+strlen(thegame.name), char); /*ick*/
 481                 sprintf(item, "Help on %s", thegame.name);
 482                 AppendMenu(hmenu, MF_ENABLED, IDM_GAMEHELP, item);
 483                 sfree(item);
 484             }
 485         }
 486         SetMenu(fe->hwnd, bar);
 487     }
 488
 489     if (midend_wants_statusbar(fe->me)) {
 490         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
 491                                        WS_CHILD | WS_VISIBLE,
 492                                        0, 0, 0, 0, /* status bar does these */
 493                                        fe->hwnd, NULL, inst, NULL);
 494         GetWindowRect(fe->statusbar, &sr);
 495         SetWindowPos(fe->hwnd, NULL, 0, 0,
 496                      r.right - r.left, r.bottom - r.top + sr.bottom - sr.top,
 497                      SWP_NOMOVE | SWP_NOZORDER);
 498         SetWindowPos(fe->statusbar, NULL, 0, y, x, sr.bottom - sr.top,
 499                      SWP_NOZORDER);
 500     } else {
 501         fe->statusbar = NULL;
 502     }
 503
 504     hdc = GetDC(fe->hwnd);
 505     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 506     ReleaseDC(fe->hwnd, hdc);
 507
 508     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
 509
 510     ShowWindow(fe->hwnd, SW_NORMAL);
 511     SetForegroundWindow(fe->hwnd);
 512
 513     midend_redraw(fe->me);
 514
 515     return fe;
 516 }
 517
 518 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
 519                                   WPARAM wParam, LPARAM lParam)
 520 {
 521     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 522     config_item *i;
 523     struct cfg_aux *j;
 524
 525     switch (msg) {
 526       case WM_INITDIALOG:
 527         return 0;
 528
 529       case WM_COMMAND:
 530         /*
 531          * OK and Cancel are special cases.
 532          */
 533         if ((HIWORD(wParam) == BN_CLICKED ||
 534              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 535             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
 536             if (LOWORD(wParam) == IDOK) {
 537                 char *err = midend_set_config(fe->me, fe->cfg_which, fe->cfg);
 538
 539                 if (err) {
 540                     MessageBox(hwnd, err, "Validation error",
 541                                MB_ICONERROR | MB_OK);
 542                 } else {
 543                     fe->cfg_done = 2;
 544                 }
 545             } else {
 546                 fe->cfg_done = 1;
 547             }
 548             return 0;
 549         }
 550
 551         /*
 552          * First find the control whose id this is.
 553          */
 554         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 555             if (j->ctlid == LOWORD(wParam))
 556                 break;
 557         }
 558         if (i->type == C_END)
 559             return 0;                  /* not our problem */
 560
 561         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
 562             char buffer[4096];
 563             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
 564             buffer[lenof(buffer)-1] = '\0';
 565             sfree(i->sval);
 566             i->sval = dupstr(buffer);
 567         } else if (i->type == C_BOOLEAN &&
 568                    (HIWORD(wParam) == BN_CLICKED ||
 569                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
 570             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
 571         } else if (i->type == C_CHOICES &&
 572                    HIWORD(wParam) == CBN_SELCHANGE) {
 573             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
 574                                          CB_GETCURSEL, 0, 0);
 575         }
 576
 577         return 0;
 578
 579       case WM_CLOSE:
 580         fe->cfg_done = 1;
 581         return 0;
 582     }
 583
 584     return 0;
 585 }
 586
 587 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
 588             char *wclass, int wstyle,
 589             int exstyle, char *wtext, int wid)
 590 {
 591     HWND ret;
 592     ret = CreateWindowEx(exstyle, wclass, wtext,
 593                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
 594                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
 595     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
 596     return ret;
 597 }
 598
 599 static int get_config(frontend *fe, int which)
 600 {
 601     config_item *i;
 602     struct cfg_aux *j;
 603     char *title;
 604     WNDCLASS wc;
 605     MSG msg;
 606     TEXTMETRIC tm;
 607     HDC hdc;
 608     HFONT oldfont;
 609     SIZE size;
 610     HWND ctl;
 611     int gm, id, nctrls;
 612     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
 613     int height, width, maxlabel, maxcheckbox;
 614
 615     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 616     wc.lpfnWndProc = DefDlgProc;
 617     wc.cbClsExtra = 0;
 618     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 619     wc.hInstance = fe->inst;
 620     wc.hIcon = NULL;
 621     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 622     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 623     wc.lpszMenuName = NULL;
 624     wc.lpszClassName = "GameConfigBox";
 625     RegisterClass(&wc);
 626
 627     hdc = GetDC(fe->hwnd);
 628     SetMapMode(hdc, MM_TEXT);
 629
 630     fe->cfg_done = FALSE;
 631
 632     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 633                              0, 0, 0, 0,
 634                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 635                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 636                              DEFAULT_QUALITY,
 637                              FF_SWISS,
 638                              "MS Shell Dlg");
 639
 640     oldfont = SelectObject(hdc, fe->cfgfont);
 641     if (GetTextMetrics(hdc, &tm)) {
 642         height = tm.tmAscent + tm.tmDescent;
 643         width = tm.tmAveCharWidth;
 644     } else {
 645         height = width = 30;
 646     }
 647
 648     fe->cfg = midend_get_config(fe->me, which, &title);
 649     fe->cfg_which = which;
 650
 651     /*
 652      * Figure out the layout of the config box by measuring the
 653      * length of each piece of text.
 654      */
 655     maxlabel = maxcheckbox = 0;
 656     winheight = height/2;
 657
 658     for (i = fe->cfg; i->type != C_END; i++) {
 659         switch (i->type) {
 660           case C_STRING:
 661           case C_CHOICES:
 662             /*
 663              * Both these control types have a label filling only
 664              * the left-hand column of the box.
 665              */
 666             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
 667                 maxlabel < size.cx)
 668                 maxlabel = size.cx;
 669             winheight += height * 3 / 2 + (height / 2);
 670             break;
 671
 672           case C_BOOLEAN:
 673             /*
 674              * Checkboxes take up the whole of the box width.
 675              */
 676             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
 677                 maxcheckbox < size.cx)
 678                 maxcheckbox = size.cx;
 679             winheight += height + (height / 2);
 680             break;
 681         }
 682     }
 683
 684     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
 685
 686     col1l = 2*width;
 687     col1r = col1l + maxlabel;
 688     col2l = col1r + 2*width;
 689     col2r = col2l + 30*width;
 690     if (col2r < col1l+2*height+maxcheckbox)
 691         col2r = col1l+2*height+maxcheckbox;
 692     winwidth = col2r + 2*width;
 693
 694     ReleaseDC(fe->hwnd, hdc);
 695
 696     /*
 697      * Create the dialog, now that we know its size.
 698      */
 699     {
 700         RECT r, r2;
 701
 702         r.left = r.top = 0;
 703         r.right = winwidth;
 704         r.bottom = winheight;
 705
 706         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
 707                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 708                                 WS_CAPTION | WS_SYSMENU*/) &~
 709                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
 710                            FALSE, 0);
 711
 712         /*
 713          * Centre the dialog on its parent window.
 714          */
 715         r.right -= r.left;
 716         r.bottom -= r.top;
 717         GetWindowRect(fe->hwnd, &r2);
 718         r.left = (r2.left + r2.right - r.right) / 2;
 719         r.top = (r2.top + r2.bottom - r.bottom) / 2;
 720         r.right += r.left;
 721         r.bottom += r.top;
 722
 723         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
 724                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 725                                     WS_CAPTION | WS_SYSMENU,
 726                                     r.left, r.top,
 727                                     r.right-r.left, r.bottom-r.top,
 728                                     fe->hwnd, NULL, fe->inst, NULL);
 729         sfree(title);
 730     }
 731
 732     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
 733
 734     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
 735     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
 736
 737     /*
 738      * Count the controls so we can allocate cfgaux.
 739      */
 740     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
 741         nctrls++;
 742     fe->cfgaux = snewn(nctrls, struct cfg_aux);
 743
 744     id = 1000;
 745     y = height/2;
 746     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 747         switch (i->type) {
 748           case C_STRING:
 749             /*
 750              * Edit box with a label beside it.
 751              */
 752             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
 753                    "Static", 0, 0, i->name, id++);
 754             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
 755                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
 756                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
 757             SetWindowText(ctl, i->sval);
 758             y += height*3/2;
 759             break;
 760
 761           case C_BOOLEAN:
 762             /*
 763              * Simple checkbox.
 764              */
 765             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
 766                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
 767                    0, i->name, (j->ctlid = id++));
 768             CheckDlgButton(fe->cfgbox, j->ctlid, (i->ival != 0));
 769             y += height;
 770             break;
 771
 772           case C_CHOICES:
 773             /*
 774              * Drop-down list with a label beside it.
 775              */
 776             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
 777                    "STATIC", 0, 0, i->name, id++);
 778             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
 779                          "COMBOBOX", WS_TABSTOP |
 780                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
 781                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
 782             {
 783                 char c, *p, *q, *str;
 784
 785                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
 786                 p = i->sval;
 787                 c = *p++;
 788                 while (*p) {
 789                     q = p;
 790                     while (*q && *q != c) q++;
 791                     str = snewn(q-p+1, char);
 792                     strncpy(str, p, q-p);
 793                     str[q-p] = '\0';
 794                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
 795                     sfree(str);
 796                     if (*q) q++;
 797                     p = q;
 798                 }
 799             }
 800
 801             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
 802
 803             y += height*3/2;
 804             break;
 805         }
 806
 807         assert(y < winheight);
 808         y += height/2;
 809     }
 810
 811     y += height/2;                     /* extra space before OK and Cancel */
 812     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
 813            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
 814            "OK", IDOK);
 815     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
 816            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
 817
 818     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
 819
 820     EnableWindow(fe->hwnd, FALSE);
 821     ShowWindow(fe->cfgbox, SW_NORMAL);
 822     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
 823         if (!IsDialogMessage(fe->cfgbox, &msg))
 824             DispatchMessage(&msg);
 825         if (fe->cfg_done)
 826             break;
 827     }
 828     EnableWindow(fe->hwnd, TRUE);
 829     SetForegroundWindow(fe->hwnd);
 830     DestroyWindow(fe->cfgbox);
 831     DeleteObject(fe->cfgfont);
 832
 833     free_cfg(fe->cfg);
 834     sfree(fe->cfgaux);
 835
 836     return (fe->cfg_done == 2);
 837 }
 838
 839 static void new_game_type(frontend *fe)
 840 {
 841     RECT r, sr;
 842     HDC hdc;
 843     int x, y;
 844
 845     midend_new_game(fe->me);
 846     midend_size(fe->me, &x, &y);
 847
 848     r.left = r.top = 0;
 849     r.right = x;
 850     r.bottom = y;
 851     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 852                        (WS_THICKFRAME | WS_MAXIMIZEBOX |
 853                         WS_OVERLAPPED),
 854                        TRUE, 0);
 855
 856     if (fe->statusbar != NULL) {
 857         GetWindowRect(fe->statusbar, &sr);
 858     } else {
 859         sr.left = sr.right = sr.top = sr.bottom = 0;
 860     }
 861     SetWindowPos(fe->hwnd, NULL, 0, 0,
 862                  r.right - r.left,
 863                  r.bottom - r.top + sr.bottom - sr.top,
 864                  SWP_NOMOVE | SWP_NOZORDER);
 865     if (fe->statusbar != NULL)
 866         SetWindowPos(fe->statusbar, NULL, 0, y, x,
 867                      sr.bottom - sr.top, SWP_NOZORDER);
 868
 869     DeleteObject(fe->bitmap);
 870
 871     hdc = GetDC(fe->hwnd);
 872     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 873     ReleaseDC(fe->hwnd, hdc);
 874
 875     midend_redraw(fe->me);
 876 }
 877
 878 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
 879                                 WPARAM wParam, LPARAM lParam)
 880 {
 881     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 882
 883     switch (message) {
 884       case WM_CLOSE:
 885         DestroyWindow(hwnd);
 886         return 0;
 887       case WM_COMMAND:
 888         switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
 889           case IDM_NEW:
 890             if (!midend_process_key(fe->me, 0, 0, 'n'))
 891                 PostQuitMessage(0);
 892             break;
 893           case IDM_RESTART:
 894             if (!midend_process_key(fe->me, 0, 0, 'r'))
 895                 PostQuitMessage(0);
 896             break;
 897           case IDM_UNDO:
 898             if (!midend_process_key(fe->me, 0, 0, 'u'))
 899                 PostQuitMessage(0);
 900             break;
 901           case IDM_REDO:
 902             if (!midend_process_key(fe->me, 0, 0, '\x12'))
 903                 PostQuitMessage(0);
 904             break;
 905           case IDM_QUIT:
 906             if (!midend_process_key(fe->me, 0, 0, 'q'))
 907                 PostQuitMessage(0);
 908             break;
 909           case IDM_CONFIG:
 910             if (get_config(fe, CFG_SETTINGS))
 911                 new_game_type(fe);
 912             break;
 913           case IDM_SEED:
 914             if (get_config(fe, CFG_SEED))
 915                 new_game_type(fe);
 916             break;
 917           case IDM_HELPC:
 918             assert(fe->help_path);
 919             WinHelp(hwnd, fe->help_path,
 920                     fe->help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
 921             break;
 922           case IDM_GAMEHELP:
 923             assert(fe->help_path);
 924             assert(thegame.winhelp_topic);
 925             {
 926                 char *cmd = snewn(10+strlen(thegame.winhelp_topic), char);
 927                 sprintf(cmd, "JI(`',`%s')", thegame.winhelp_topic);
 928                 WinHelp(hwnd, fe->help_path, HELP_COMMAND, (DWORD)cmd);
 929                 sfree(cmd);
 930             }
 931             break;
 932           default:
 933             {
 934                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
 935
 936                 if (p >= 0 && p < fe->npresets) {
 937                     midend_set_params(fe->me, fe->presets[p]);
 938                     new_game_type(fe);
 939                 }
 940             }
 941             break;
 942         }
 943         break;
 944       case WM_DESTROY:
 945         PostQuitMessage(0);
 946         return 0;
 947       case WM_PAINT:
 948         {
 949             PAINTSTRUCT p;
 950             HDC hdc, hdc2;
 951             HBITMAP prevbm;
 952
 953             hdc = BeginPaint(hwnd, &p);
 954             hdc2 = CreateCompatibleDC(hdc);
 955             prevbm = SelectObject(hdc2, fe->bitmap);
 956             BitBlt(hdc,
 957                    p.rcPaint.left, p.rcPaint.top,
 958                    p.rcPaint.right - p.rcPaint.left,
 959                    p.rcPaint.bottom - p.rcPaint.top,
 960                    hdc2,
 961                    p.rcPaint.left, p.rcPaint.top,
 962                    SRCCOPY);
 963             SelectObject(hdc2, prevbm);
 964             DeleteDC(hdc2);
 965             EndPaint(hwnd, &p);
 966         }
 967         return 0;
 968       case WM_KEYDOWN:
 969         {
 970             int key = -1;
 971
 972             switch (wParam) {
 973               case VK_LEFT: key = CURSOR_LEFT; break;
 974               case VK_RIGHT: key = CURSOR_RIGHT; break;
 975               case VK_UP: key = CURSOR_UP; break;
 976               case VK_DOWN: key = CURSOR_DOWN; break;
 977                 /*
 978                  * Diagonal keys on the numeric keypad.
 979                  */
 980               case VK_PRIOR:
 981                 if (!(lParam & 0x01000000)) key = CURSOR_UP_RIGHT;
 982                 break;
 983               case VK_NEXT:
 984                 if (!(lParam & 0x01000000)) key = CURSOR_DOWN_RIGHT;
 985                 break;
 986               case VK_HOME:
 987                 if (!(lParam & 0x01000000)) key = CURSOR_UP_LEFT;
 988                 break;
 989               case VK_END:
 990                 if (!(lParam & 0x01000000)) key = CURSOR_DOWN_LEFT;
 991                 break;
 992                 /*
 993                  * Numeric keypad keys with Num Lock on.
 994                  */
 995               case VK_NUMPAD4: key = CURSOR_LEFT; break;
 996               case VK_NUMPAD6: key = CURSOR_RIGHT; break;
 997               case VK_NUMPAD8: key = CURSOR_UP; break;
 998               case VK_NUMPAD2: key = CURSOR_DOWN; break;
 999               case VK_NUMPAD9: key = CURSOR_UP_RIGHT; break;
1000               case VK_NUMPAD3: key = CURSOR_DOWN_RIGHT; break;
1001               case VK_NUMPAD7: key = CURSOR_UP_LEFT; break;
1002               case VK_NUMPAD1: key = CURSOR_DOWN_LEFT; break;
1003             }
1004
1005             if (key != -1) {
1006                 if (!midend_process_key(fe->me, 0, 0, key))
1007                     PostQuitMessage(0);
1008             } else {
1009                 MSG m;
1010                 m.hwnd = hwnd;
1011                 m.message = WM_KEYDOWN;
1012                 m.wParam = wParam;
1013                 m.lParam = lParam & 0xdfff;
1014                 TranslateMessage(&m);
1015             }
1016         }
1017         break;
1018       case WM_LBUTTONDOWN:
1019       case WM_RBUTTONDOWN:
1020       case WM_MBUTTONDOWN:
1021         {
1022             int button;
1023
1024             /*
1025              * Shift-clicks count as middle-clicks, since otherwise
1026              * two-button Windows users won't have any kind of
1027              * middle click to use.
1028              */
1029             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
1030                 button = MIDDLE_BUTTON;
1031             else if (message == WM_LBUTTONDOWN)
1032                 button = LEFT_BUTTON;
1033             else
1034                 button = RIGHT_BUTTON;
1035
1036             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1037                                     (signed short)HIWORD(lParam), button))
1038                 PostQuitMessage(0);
1039
1040             SetCapture(hwnd);
1041         }
1042         break;
1043       case WM_LBUTTONUP:
1044       case WM_RBUTTONUP:
1045       case WM_MBUTTONUP:
1046         {
1047             int button;
1048
1049             /*
1050              * Shift-clicks count as middle-clicks, since otherwise
1051              * two-button Windows users won't have any kind of
1052              * middle click to use.
1053              */
1054             if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
1055                 button = MIDDLE_RELEASE;
1056             else if (message == WM_LBUTTONUP)
1057                 button = LEFT_RELEASE;
1058             else
1059                 button = RIGHT_RELEASE;
1060
1061             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1062                                     (signed short)HIWORD(lParam), button))
1063                 PostQuitMessage(0);
1064
1065             ReleaseCapture();
1066         }
1067         break;
1068       case WM_MOUSEMOVE:
1069         {
1070             int button;
1071
1072             if (wParam & (MK_MBUTTON | MK_SHIFT))
1073                 button = MIDDLE_DRAG;
1074             else if (wParam & MK_LBUTTON)
1075                 button = LEFT_DRAG;
1076             else
1077                 button = RIGHT_DRAG;
1078
1079             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1080                                     (signed short)HIWORD(lParam), button))
1081                 PostQuitMessage(0);
1082         }
1083         break;
1084       case WM_CHAR:
1085         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
1086             PostQuitMessage(0);
1087         return 0;
1088       case WM_TIMER:
1089         if (fe->timer) {
1090             DWORD now = GetTickCount();
1091             float elapsed = (float) (now - fe->timer_last_tickcount) * 0.001F;
1092             midend_timer(fe->me, elapsed);
1093             fe->timer_last_tickcount = now;
1094         }
1095         return 0;
1096     }
1097
1098     return DefWindowProc(hwnd, message, wParam, lParam);
1099 }
1100
1101 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
1102 {
1103     MSG msg;
1104     char *error;
1105
1106     InitCommonControls();
1107
1108     if (!prev) {
1109         WNDCLASS wndclass;
1110
1111         wndclass.style = 0;
1112         wndclass.lpfnWndProc = WndProc;
1113         wndclass.cbClsExtra = 0;
1114         wndclass.cbWndExtra = 0;
1115         wndclass.hInstance = inst;
1116         wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
1117         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
1118         wndclass.hbrBackground = NULL;
1119         wndclass.lpszMenuName = NULL;
1120         wndclass.lpszClassName = thegame.name;
1121
1122         RegisterClass(&wndclass);
1123     }
1124
1125     while (*cmdline && isspace(*cmdline))
1126         cmdline++;
1127
1128     if (!new_window(inst, *cmdline ? cmdline : NULL, &error)) {
1129         char buf[128];
1130         sprintf(buf, "%.100s Error", thegame.name);
1131         MessageBox(NULL, error, buf, MB_OK|MB_ICONERROR);
1132         return 1;
1133     }
1134
1135     while (GetMessage(&msg, NULL, 0, 0)) {
1136         DispatchMessage(&msg);
1137     }
1138
1139     return msg.wParam;
1140 }