mdw@git.distorted.org.uk Git - sgt/puzzles/blob - windows.c

   1 /*
   2  * windows.c: Windows front end for my puzzle collection.
   3  */
   4
   5 #include <windows.h>
   6 #include <commctrl.h>
   7
   8 #include <stdio.h>
   9 #include <assert.h>
  10 #include <ctype.h>
  11 #include <stdarg.h>
  12 #include <stdlib.h>
  13 #include <limits.h>
  14 #include <time.h>
  15
  16 #include "puzzles.h"
  17
  18 #define IDM_NEW       0x0010
  19 #define IDM_RESTART   0x0020
  20 #define IDM_UNDO      0x0030
  21 #define IDM_REDO      0x0040
  22 #define IDM_COPY      0x0050
  23 #define IDM_SOLVE     0x0060
  24 #define IDM_QUIT      0x0070
  25 #define IDM_CONFIG    0x0080
  26 #define IDM_DESC      0x0090
  27 #define IDM_SEED      0x00A0
  28 #define IDM_HELPC     0x00B0
  29 #define IDM_GAMEHELP  0x00C0
  30 #define IDM_ABOUT     0x00D0
  31 #define IDM_PRESETS   0x0100
  32
  33 #define HELP_FILE_NAME  "puzzles.hlp"
  34 #define HELP_CNT_NAME   "puzzles.cnt"
  35
  36 #ifdef DEBUG
  37 static FILE *debug_fp = NULL;
  38 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
  39 static int debug_got_console = 0;
  40
  41 void dputs(char *buf)
  42 {
  43     DWORD dw;
  44
  45     if (!debug_got_console) {
  46         if (AllocConsole()) {
  47             debug_got_console = 1;
  48             debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
  49         }
  50     }
  51     if (!debug_fp) {
  52         debug_fp = fopen("debug.log", "w");
  53     }
  54
  55     if (debug_hdl != INVALID_HANDLE_VALUE) {
  56         WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
  57     }
  58     fputs(buf, debug_fp);
  59     fflush(debug_fp);
  60 }
  61
  62 void debug_printf(char *fmt, ...)
  63 {
  64     char buf[4096];
  65     va_list ap;
  66
  67     va_start(ap, fmt);
  68     vsprintf(buf, fmt, ap);
  69     dputs(buf);
  70     va_end(ap);
  71 }
  72 #endif
  73
  74 struct font {
  75     HFONT font;
  76     int type;
  77     int size;
  78 };
  79
  80 struct cfg_aux {
  81     int ctlid;
  82 };
  83
  84 struct blitter {
  85     HBITMAP bitmap;
  86     frontend *fe;
  87     int x, y, w, h;
  88 };
  89
  90 struct frontend {
  91     midend_data *me;
  92     HWND hwnd, statusbar, cfgbox;
  93     HINSTANCE inst;
  94     HBITMAP bitmap, prevbm;
  95     HDC hdc_bm;
  96     COLORREF *colours;
  97     HBRUSH *brushes;
  98     HPEN *pens;
  99     HRGN clip;
 100     UINT timer;
 101     DWORD timer_last_tickcount;
 102     int npresets;
 103     game_params **presets;
 104     struct font *fonts;
 105     int nfonts, fontsize;
 106     config_item *cfg;
 107     struct cfg_aux *cfgaux;
 108     int cfg_which, dlg_done;
 109     HFONT cfgfont;
 110     char *help_path;
 111     int help_has_contents;
 112     char *laststatus;
 113 };
 114
 115 void fatal(char *fmt, ...)
 116 {
 117     char buf[2048];
 118     va_list ap;
 119
 120     va_start(ap, fmt);
 121     vsprintf(buf, fmt, ap);
 122     va_end(ap);
 123
 124     MessageBox(NULL, buf, "Fatal error", MB_ICONEXCLAMATION | MB_OK);
 125
 126     exit(1);
 127 }
 128
 129 void get_random_seed(void **randseed, int *randseedsize)
 130 {
 131     time_t *tp = snew(time_t);
 132     time(tp);
 133     *randseed = (void *)tp;
 134     *randseedsize = sizeof(time_t);
 135 }
 136
 137 void status_bar(frontend *fe, char *text)
 138 {
 139     char *rewritten = midend_rewrite_statusbar(fe->me, text);
 140     if (!fe->laststatus || strcmp(rewritten, fe->laststatus)) {
 141         SetWindowText(fe->statusbar, rewritten);
 142         sfree(fe->laststatus);
 143         fe->laststatus = rewritten;
 144     } else {
 145         sfree(rewritten);
 146     }
 147 }
 148
 149 blitter *blitter_new(int w, int h)
 150 {
 151     blitter *bl = snew(blitter);
 152
 153     memset(bl, 0, sizeof(blitter));
 154     bl->w = w;
 155     bl->h = h;
 156     bl->bitmap = 0;
 157
 158     return bl;
 159 }
 160
 161 void blitter_free(blitter *bl)
 162 {
 163     if (bl->bitmap) DeleteObject(bl->bitmap);
 164     sfree(bl);
 165 }
 166
 167 static void blitter_mkbitmap(frontend *fe, blitter *bl)
 168 {
 169     HDC hdc = GetDC(fe->hwnd);
 170     bl->bitmap = CreateCompatibleBitmap(hdc, bl->w, bl->h);
 171     ReleaseDC(fe->hwnd, hdc);
 172 }
 173
 174 /* BitBlt(dstDC, dstX, dstY, dstW, dstH, srcDC, srcX, srcY, dType) */
 175
 176 void blitter_save(frontend *fe, blitter *bl, int x, int y)
 177 {
 178     HDC hdc_win, hdc_blit;
 179     HBITMAP prev_blit;
 180
 181     if (!bl->bitmap) blitter_mkbitmap(fe, bl);
 182
 183     bl->x = x; bl->y = y;
 184
 185     hdc_win = GetDC(fe->hwnd);
 186     hdc_blit = CreateCompatibleDC(hdc_win);
 187     if (!hdc_blit) fatal("hdc_blit failed: 0x%x", GetLastError());
 188
 189     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 190     if (prev_blit == NULL || prev_blit == HGDI_ERROR)
 191         fatal("SelectObject for hdc_main failed: 0x%x", GetLastError());
 192
 193     if (!BitBlt(hdc_blit, 0, 0, bl->w, bl->h,
 194                 fe->hdc_bm, x, y, SRCCOPY))
 195         fatal("BitBlt failed: 0x%x", GetLastError());
 196
 197     SelectObject(hdc_blit, prev_blit);
 198     DeleteDC(hdc_blit);
 199     ReleaseDC(fe->hwnd, hdc_win);
 200 }
 201
 202 void blitter_load(frontend *fe, blitter *bl, int x, int y)
 203 {
 204     HDC hdc_win, hdc_blit;
 205     HBITMAP prev_blit;
 206
 207     assert(bl->bitmap); /* we should always have saved before loading */
 208
 209     if (x == BLITTER_FROMSAVED) x = bl->x;
 210     if (y == BLITTER_FROMSAVED) y = bl->y;
 211
 212     hdc_win = GetDC(fe->hwnd);
 213     hdc_blit = CreateCompatibleDC(hdc_win);
 214
 215     prev_blit = SelectObject(hdc_blit, bl->bitmap);
 216
 217     BitBlt(fe->hdc_bm, x, y, bl->w, bl->h,
 218            hdc_blit, 0, 0, SRCCOPY);
 219
 220     SelectObject(hdc_blit, prev_blit);
 221     DeleteDC(hdc_blit);
 222     ReleaseDC(fe->hwnd, hdc_win);
 223 }
 224
 225 void frontend_default_colour(frontend *fe, float *output)
 226 {
 227     DWORD c = GetSysColor(COLOR_MENU); /* ick */
 228
 229     output[0] = (float)(GetRValue(c) / 255.0);
 230     output[1] = (float)(GetGValue(c) / 255.0);
 231     output[2] = (float)(GetBValue(c) / 255.0);
 232 }
 233
 234 void clip(frontend *fe, int x, int y, int w, int h)
 235 {
 236     IntersectClipRect(fe->hdc_bm, x, y, x+w, y+h);
 237 }
 238
 239 void unclip(frontend *fe)
 240 {
 241     SelectClipRgn(fe->hdc_bm, NULL);
 242 }
 243
 244 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 245                int align, int colour, char *text)
 246 {
 247     int i;
 248
 249     /*
 250      * Find or create the font.
 251      */
 252     for (i = 0; i < fe->nfonts; i++)
 253         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 254             break;
 255
 256     if (i == fe->nfonts) {
 257         if (fe->fontsize <= fe->nfonts) {
 258             fe->fontsize = fe->nfonts + 10;
 259             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 260         }
 261
 262         fe->nfonts++;
 263
 264         fe->fonts[i].type = fonttype;
 265         fe->fonts[i].size = fontsize;
 266
 267         fe->fonts[i].font = CreateFont(-fontsize, 0, 0, 0, FW_BOLD,
 268                                        FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 269                                        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 270                                        DEFAULT_QUALITY,
 271                                        (fonttype == FONT_FIXED ?
 272                                         FIXED_PITCH | FF_DONTCARE :
 273                                         VARIABLE_PITCH | FF_SWISS),
 274                                        NULL);
 275     }
 276
 277     /*
 278      * Position and draw the text.
 279      */
 280     {
 281         HFONT oldfont;
 282         TEXTMETRIC tm;
 283         SIZE size;
 284
 285         oldfont = SelectObject(fe->hdc_bm, fe->fonts[i].font);
 286         if (GetTextMetrics(fe->hdc_bm, &tm)) {
 287             if (align & ALIGN_VCENTRE)
 288                 y -= (tm.tmAscent+tm.tmDescent)/2;
 289             else
 290                 y -= tm.tmAscent;
 291         }
 292         if (GetTextExtentPoint32(fe->hdc_bm, text, strlen(text), &size)) {
 293             if (align & ALIGN_HCENTRE)
 294                 x -= size.cx / 2;
 295             else if (align & ALIGN_HRIGHT)
 296                 x -= size.cx;
 297         }
 298         SetBkMode(fe->hdc_bm, TRANSPARENT);
 299         SetTextColor(fe->hdc_bm, fe->colours[colour]);
 300         TextOut(fe->hdc_bm, x, y, text, strlen(text));
 301         SelectObject(fe->hdc_bm, oldfont);
 302     }
 303 }
 304
 305 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour)
 306 {
 307     if (w == 1 && h == 1) {
 308         /*
 309          * Rectangle() appears to get uppity if asked to draw a 1x1
 310          * rectangle, presumably on the grounds that that's beneath
 311          * its dignity and you ought to be using SetPixel instead.
 312          * So I will.
 313          */
 314         SetPixel(fe->hdc_bm, x, y, fe->colours[colour]);
 315     } else {
 316         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 317         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 318         Rectangle(fe->hdc_bm, x, y, x+w, y+h);
 319         SelectObject(fe->hdc_bm, oldbrush);
 320         SelectObject(fe->hdc_bm, oldpen);
 321     }
 322 }
 323
 324 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour)
 325 {
 326     HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 327     MoveToEx(fe->hdc_bm, x1, y1, NULL);
 328     LineTo(fe->hdc_bm, x2, y2);
 329     SetPixel(fe->hdc_bm, x2, y2, fe->colours[colour]);
 330     SelectObject(fe->hdc_bm, oldpen);
 331 }
 332
 333 void draw_polygon(frontend *fe, int *coords, int npoints,
 334                   int fill, int colour)
 335 {
 336     POINT *pts = snewn(npoints+1, POINT);
 337     int i;
 338
 339     for (i = 0; i <= npoints; i++) {
 340         int j = (i < npoints ? i : 0);
 341         pts[i].x = coords[j*2];
 342         pts[i].y = coords[j*2+1];
 343     }
 344
 345     if (fill) {
 346         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 347         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 348         Polygon(fe->hdc_bm, pts, npoints);
 349         SelectObject(fe->hdc_bm, oldbrush);
 350         SelectObject(fe->hdc_bm, oldpen);
 351     } else {
 352         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 353         Polyline(fe->hdc_bm, pts, npoints+1);
 354         SelectObject(fe->hdc_bm, oldpen);
 355     }
 356
 357     sfree(pts);
 358 }
 359
 360 void start_draw(frontend *fe)
 361 {
 362     HDC hdc_win;
 363     hdc_win = GetDC(fe->hwnd);
 364     fe->hdc_bm = CreateCompatibleDC(hdc_win);
 365     fe->prevbm = SelectObject(fe->hdc_bm, fe->bitmap);
 366     ReleaseDC(fe->hwnd, hdc_win);
 367     fe->clip = NULL;
 368     SetMapMode(fe->hdc_bm, MM_TEXT);
 369 }
 370
 371 void draw_update(frontend *fe, int x, int y, int w, int h)
 372 {
 373     RECT r;
 374
 375     r.left = x;
 376     r.top = y;
 377     r.right = x + w;
 378     r.bottom = y + h;
 379
 380     InvalidateRect(fe->hwnd, &r, FALSE);
 381 }
 382
 383 void end_draw(frontend *fe)
 384 {
 385     SelectObject(fe->hdc_bm, fe->prevbm);
 386     DeleteDC(fe->hdc_bm);
 387     if (fe->clip) {
 388         DeleteObject(fe->clip);
 389         fe->clip = NULL;
 390     }
 391 }
 392
 393 void deactivate_timer(frontend *fe)
 394 {
 395     KillTimer(fe->hwnd, fe->timer);
 396     fe->timer = 0;
 397 }
 398
 399 void activate_timer(frontend *fe)
 400 {
 401     if (!fe->timer) {
 402         fe->timer = SetTimer(fe->hwnd, fe->timer, 20, NULL);
 403         fe->timer_last_tickcount = GetTickCount();
 404     }
 405 }
 406
 407 void write_clip(HWND hwnd, char *data)
 408 {
 409     HGLOBAL clipdata;
 410     int len, i, j;
 411     char *data2;
 412     void *lock;
 413
 414     /*
 415      * Windows expects CRLF in the clipboard, so we must convert
 416      * any \n that has come out of the puzzle backend.
 417      */
 418     len = 0;
 419     for (i = 0; data[i]; i++) {
 420         if (data[i] == '\n')
 421             len++;
 422         len++;
 423     }
 424     data2 = snewn(len+1, char);
 425     j = 0;
 426     for (i = 0; data[i]; i++) {
 427         if (data[i] == '\n')
 428             data2[j++] = '\r';
 429         data2[j++] = data[i];
 430     }
 431     assert(j == len);
 432     data2[j] = '\0';
 433
 434     clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
 435     if (!clipdata)
 436         return;
 437     lock = GlobalLock(clipdata);
 438     if (!lock)
 439         return;
 440     memcpy(lock, data2, len);
 441     ((unsigned char *) lock)[len] = 0;
 442     GlobalUnlock(clipdata);
 443
 444     if (OpenClipboard(hwnd)) {
 445         EmptyClipboard();
 446         SetClipboardData(CF_TEXT, clipdata);
 447         CloseClipboard();
 448     } else
 449         GlobalFree(clipdata);
 450
 451     sfree(data2);
 452 }
 453
 454 /*
 455  * See if we can find a help file.
 456  */
 457 static void find_help_file(frontend *fe)
 458 {
 459     char b[2048], *p, *q, *r;
 460     FILE *fp;
 461     if (!fe->help_path) {
 462         GetModuleFileName(NULL, b, sizeof(b) - 1);
 463         r = b;
 464         p = strrchr(b, '\\');
 465         if (p && p >= r) r = p+1;
 466         q = strrchr(b, ':');
 467         if (q && q >= r) r = q+1;
 468         strcpy(r, HELP_FILE_NAME);
 469         if ( (fp = fopen(b, "r")) != NULL) {
 470             fe->help_path = dupstr(b);
 471             fclose(fp);
 472         } else
 473             fe->help_path = NULL;
 474         strcpy(r, HELP_CNT_NAME);
 475         if ( (fp = fopen(b, "r")) != NULL) {
 476             fe->help_has_contents = TRUE;
 477             fclose(fp);
 478         } else
 479             fe->help_has_contents = FALSE;
 480     }
 481 }
 482
 483 static void check_window_size(frontend *fe, int *px, int *py)
 484 {
 485     RECT r;
 486     int x, y, sy;
 487
 488     if (fe->statusbar) {
 489         RECT sr;
 490         GetWindowRect(fe->statusbar, &sr);
 491         sy = sr.bottom - sr.top;
 492     } else {
 493         sy = 0;
 494     }
 495
 496     /*
 497      * See if we actually got the window size we wanted, and adjust
 498      * the puzzle size if not.
 499      */
 500     GetClientRect(fe->hwnd, &r);
 501     x = r.right - r.left;
 502     y = r.bottom - r.top - sy;
 503     midend_size(fe->me, &x, &y, FALSE);
 504     if (x != r.right - r.left || y != r.bottom - r.top) {
 505         /*
 506          * Resize the window, now we know what size we _really_
 507          * want it to be.
 508          */
 509         r.left = r.top = 0;
 510         r.right = x;
 511         r.bottom = y + sy;
 512         AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 513                            (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 514                            TRUE, 0);
 515         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left, r.bottom - r.top,
 516                      SWP_NOMOVE | SWP_NOZORDER);
 517     }
 518
 519     if (fe->statusbar) {
 520         GetClientRect(fe->hwnd, &r);
 521         SetWindowPos(fe->statusbar, NULL, 0, r.bottom-r.top-sy, r.right-r.left,
 522                      sy, SWP_NOZORDER);
 523     }
 524
 525     *px = x;
 526     *py = y;
 527 }
 528
 529 static frontend *new_window(HINSTANCE inst, char *game_id, char **error)
 530 {
 531     frontend *fe;
 532     int x, y;
 533     RECT r;
 534     HDC hdc;
 535
 536     fe = snew(frontend);
 537
 538     fe->me = midend_new(fe, &thegame);
 539
 540     if (game_id) {
 541         *error = midend_game_id(fe->me, game_id);
 542         if (*error) {
 543             midend_free(fe->me);
 544             sfree(fe);
 545             return NULL;
 546         }
 547     }
 548
 549     fe->help_path = NULL;
 550     find_help_file(fe);
 551
 552     fe->inst = inst;
 553     midend_new_game(fe->me);
 554
 555     fe->timer = 0;
 556
 557     fe->fonts = NULL;
 558     fe->nfonts = fe->fontsize = 0;
 559
 560     fe->laststatus = NULL;
 561
 562     {
 563         int i, ncolours;
 564         float *colours;
 565
 566         colours = midend_colours(fe->me, &ncolours);
 567
 568         fe->colours = snewn(ncolours, COLORREF);
 569         fe->brushes = snewn(ncolours, HBRUSH);
 570         fe->pens = snewn(ncolours, HPEN);
 571
 572         for (i = 0; i < ncolours; i++) {
 573             fe->colours[i] = RGB(255 * colours[i*3+0],
 574                                  255 * colours[i*3+1],
 575                                  255 * colours[i*3+2]);
 576             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
 577             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
 578         }
 579     }
 580
 581     x = y = INT_MAX;                   /* find puzzle's preferred size */
 582     midend_size(fe->me, &x, &y, FALSE);
 583
 584     r.left = r.top = 0;
 585     r.right = x;
 586     r.bottom = y;
 587     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 588                        (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 589                        TRUE, 0);
 590
 591     fe->hwnd = CreateWindowEx(0, thegame.name, thegame.name,
 592                               WS_OVERLAPPEDWINDOW &~
 593                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
 594                               CW_USEDEFAULT, CW_USEDEFAULT,
 595                               r.right - r.left, r.bottom - r.top,
 596                               NULL, NULL, inst, NULL);
 597
 598     if (midend_wants_statusbar(fe->me)) {
 599         RECT sr;
 600         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
 601                                        WS_CHILD | WS_VISIBLE,
 602                                        0, 0, 0, 0, /* status bar does these */
 603                                        fe->hwnd, NULL, inst, NULL);
 604         /*
 605          * Now resize the window to take account of the status bar.
 606          */
 607         GetWindowRect(fe->statusbar, &sr);
 608         GetWindowRect(fe->hwnd, &r);
 609         SetWindowPos(fe->hwnd, NULL, 0, 0, r.right - r.left,
 610                      r.bottom - r.top + sr.bottom - sr.top,
 611                      SWP_NOMOVE | SWP_NOZORDER);
 612     } else {
 613         fe->statusbar = NULL;
 614     }
 615
 616     {
 617         HMENU bar = CreateMenu();
 618         HMENU menu = CreateMenu();
 619
 620         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
 621         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
 622         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
 623         AppendMenu(menu, MF_ENABLED, IDM_DESC, "Specific...");
 624         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Random Seed...");
 625
 626         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
 627             thegame.can_configure) {
 628             HMENU sub = CreateMenu();
 629             int i;
 630
 631             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
 632
 633             fe->presets = snewn(fe->npresets, game_params *);
 634
 635             for (i = 0; i < fe->npresets; i++) {
 636                 char *name;
 637
 638                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
 639
 640                 /*
 641                  * FIXME: we ought to go through and do something
 642                  * with ampersands here.
 643                  */
 644
 645                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
 646             }
 647
 648             if (thegame.can_configure) {
 649                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
 650             }
 651         }
 652
 653         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 654         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
 655         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
 656         if (thegame.can_format_as_text) {
 657             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 658             AppendMenu(menu, MF_ENABLED, IDM_COPY, "Copy");
 659         }
 660         if (thegame.can_solve) {
 661             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 662             AppendMenu(menu, MF_ENABLED, IDM_SOLVE, "Solve");
 663         }
 664         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 665         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
 666         menu = CreateMenu();
 667         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Help");
 668         AppendMenu(menu, MF_ENABLED, IDM_ABOUT, "About");
 669         if (fe->help_path) {
 670             AppendMenu(menu, MF_SEPARATOR, 0, 0);
 671             AppendMenu(menu, MF_ENABLED, IDM_HELPC, "Contents");
 672             if (thegame.winhelp_topic) {
 673                 char *item;
 674                 assert(thegame.name);
 675                 item = snewn(9+strlen(thegame.name), char); /*ick*/
 676                 sprintf(item, "Help on %s", thegame.name);
 677                 AppendMenu(menu, MF_ENABLED, IDM_GAMEHELP, item);
 678                 sfree(item);
 679             }
 680         }
 681         SetMenu(fe->hwnd, bar);
 682     }
 683
 684     check_window_size(fe, &x, &y);
 685
 686     hdc = GetDC(fe->hwnd);
 687     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 688     ReleaseDC(fe->hwnd, hdc);
 689
 690     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
 691
 692     ShowWindow(fe->hwnd, SW_NORMAL);
 693     SetForegroundWindow(fe->hwnd);
 694
 695     midend_redraw(fe->me);
 696
 697     return fe;
 698 }
 699
 700 static int CALLBACK AboutDlgProc(HWND hwnd, UINT msg,
 701                                  WPARAM wParam, LPARAM lParam)
 702 {
 703     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 704
 705     switch (msg) {
 706       case WM_INITDIALOG:
 707         return 0;
 708
 709       case WM_COMMAND:
 710         if ((HIWORD(wParam) == BN_CLICKED ||
 711              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 712             LOWORD(wParam) == IDOK)
 713             fe->dlg_done = 1;
 714         return 0;
 715
 716       case WM_CLOSE:
 717         fe->dlg_done = 1;
 718         return 0;
 719     }
 720
 721     return 0;
 722 }
 723
 724 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
 725                                   WPARAM wParam, LPARAM lParam)
 726 {
 727     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 728     config_item *i;
 729     struct cfg_aux *j;
 730
 731     switch (msg) {
 732       case WM_INITDIALOG:
 733         return 0;
 734
 735       case WM_COMMAND:
 736         /*
 737          * OK and Cancel are special cases.
 738          */
 739         if ((HIWORD(wParam) == BN_CLICKED ||
 740              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 741             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
 742             if (LOWORD(wParam) == IDOK) {
 743                 char *err = midend_set_config(fe->me, fe->cfg_which, fe->cfg);
 744
 745                 if (err) {
 746                     MessageBox(hwnd, err, "Validation error",
 747                                MB_ICONERROR | MB_OK);
 748                 } else {
 749                     fe->dlg_done = 2;
 750                 }
 751             } else {
 752                 fe->dlg_done = 1;
 753             }
 754             return 0;
 755         }
 756
 757         /*
 758          * First find the control whose id this is.
 759          */
 760         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 761             if (j->ctlid == LOWORD(wParam))
 762                 break;
 763         }
 764         if (i->type == C_END)
 765             return 0;                  /* not our problem */
 766
 767         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
 768             char buffer[4096];
 769             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
 770             buffer[lenof(buffer)-1] = '\0';
 771             sfree(i->sval);
 772             i->sval = dupstr(buffer);
 773         } else if (i->type == C_BOOLEAN &&
 774                    (HIWORD(wParam) == BN_CLICKED ||
 775                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
 776             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
 777         } else if (i->type == C_CHOICES &&
 778                    HIWORD(wParam) == CBN_SELCHANGE) {
 779             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
 780                                          CB_GETCURSEL, 0, 0);
 781         }
 782
 783         return 0;
 784
 785       case WM_CLOSE:
 786         fe->dlg_done = 1;
 787         return 0;
 788     }
 789
 790     return 0;
 791 }
 792
 793 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
 794             char *wclass, int wstyle,
 795             int exstyle, const char *wtext, int wid)
 796 {
 797     HWND ret;
 798     ret = CreateWindowEx(exstyle, wclass, wtext,
 799                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
 800                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
 801     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
 802     return ret;
 803 }
 804
 805 static void about(frontend *fe)
 806 {
 807     int i;
 808     WNDCLASS wc;
 809     MSG msg;
 810     TEXTMETRIC tm;
 811     HDC hdc;
 812     HFONT oldfont;
 813     SIZE size;
 814     int gm, id;
 815     int winwidth, winheight, y;
 816     int height, width, maxwid;
 817     const char *strings[16];
 818     int lengths[16];
 819     int nstrings = 0;
 820     char titlebuf[512];
 821
 822     sprintf(titlebuf, "About %.250s", thegame.name);
 823
 824     strings[nstrings++] = thegame.name;
 825     strings[nstrings++] = "from Simon Tatham's Portable Puzzle Collection";
 826     strings[nstrings++] = ver;
 827
 828     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 829     wc.lpfnWndProc = DefDlgProc;
 830     wc.cbClsExtra = 0;
 831     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 832     wc.hInstance = fe->inst;
 833     wc.hIcon = NULL;
 834     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 835     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 836     wc.lpszMenuName = NULL;
 837     wc.lpszClassName = "GameAboutBox";
 838     RegisterClass(&wc);
 839
 840     hdc = GetDC(fe->hwnd);
 841     SetMapMode(hdc, MM_TEXT);
 842
 843     fe->dlg_done = FALSE;
 844
 845     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 846                              0, 0, 0, 0,
 847                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 848                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 849                              DEFAULT_QUALITY,
 850                              FF_SWISS,
 851                              "MS Shell Dlg");
 852
 853     oldfont = SelectObject(hdc, fe->cfgfont);
 854     if (GetTextMetrics(hdc, &tm)) {
 855         height = tm.tmAscent + tm.tmDescent;
 856         width = tm.tmAveCharWidth;
 857     } else {
 858         height = width = 30;
 859     }
 860
 861     /*
 862      * Figure out the layout of the About box by measuring the
 863      * length of each piece of text.
 864      */
 865     maxwid = 0;
 866     winheight = height/2;
 867
 868     for (i = 0; i < nstrings; i++) {
 869         if (GetTextExtentPoint32(hdc, strings[i], strlen(strings[i]), &size))
 870             lengths[i] = size.cx;
 871         else
 872             lengths[i] = 0;            /* *shrug* */
 873         if (maxwid < lengths[i])
 874             maxwid = lengths[i];
 875         winheight += height * 3 / 2 + (height / 2);
 876     }
 877
 878     winheight += height + height * 7 / 4;      /* OK button */
 879     winwidth = maxwid + 4*width;
 880
 881     SelectObject(hdc, oldfont);
 882     ReleaseDC(fe->hwnd, hdc);
 883
 884     /*
 885      * Create the dialog, now that we know its size.
 886      */
 887     {
 888         RECT r, r2;
 889
 890         r.left = r.top = 0;
 891         r.right = winwidth;
 892         r.bottom = winheight;
 893
 894         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
 895                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 896                                 WS_CAPTION | WS_SYSMENU*/) &~
 897                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
 898                            FALSE, 0);
 899
 900         /*
 901          * Centre the dialog on its parent window.
 902          */
 903         r.right -= r.left;
 904         r.bottom -= r.top;
 905         GetWindowRect(fe->hwnd, &r2);
 906         r.left = (r2.left + r2.right - r.right) / 2;
 907         r.top = (r2.top + r2.bottom - r.bottom) / 2;
 908         r.right += r.left;
 909         r.bottom += r.top;
 910
 911         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, titlebuf,
 912                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 913                                     WS_CAPTION | WS_SYSMENU,
 914                                     r.left, r.top,
 915                                     r.right-r.left, r.bottom-r.top,
 916                                     fe->hwnd, NULL, fe->inst, NULL);
 917     }
 918
 919     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
 920
 921     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
 922     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)AboutDlgProc);
 923
 924     id = 1000;
 925     y = height/2;
 926     for (i = 0; i < nstrings; i++) {
 927         int border = width*2 + (maxwid - lengths[i]) / 2;
 928         mkctrl(fe, border, border+lengths[i], y+height*1/8, y+height*9/8,
 929                "Static", 0, 0, strings[i], id++);
 930         y += height*3/2;
 931
 932         assert(y < winheight);
 933         y += height/2;
 934     }
 935
 936     y += height/2;                     /* extra space before OK */
 937     mkctrl(fe, width*2, maxwid+width*2, y, y+height*7/4, "BUTTON",
 938            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
 939            "OK", IDOK);
 940
 941     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
 942
 943     EnableWindow(fe->hwnd, FALSE);
 944     ShowWindow(fe->cfgbox, SW_NORMAL);
 945     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
 946         if (!IsDialogMessage(fe->cfgbox, &msg))
 947             DispatchMessage(&msg);
 948         if (fe->dlg_done)
 949             break;
 950     }
 951     EnableWindow(fe->hwnd, TRUE);
 952     SetForegroundWindow(fe->hwnd);
 953     DestroyWindow(fe->cfgbox);
 954     DeleteObject(fe->cfgfont);
 955 }
 956
 957 static int get_config(frontend *fe, int which)
 958 {
 959     config_item *i;
 960     struct cfg_aux *j;
 961     char *title;
 962     WNDCLASS wc;
 963     MSG msg;
 964     TEXTMETRIC tm;
 965     HDC hdc;
 966     HFONT oldfont;
 967     SIZE size;
 968     HWND ctl;
 969     int gm, id, nctrls;
 970     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
 971     int height, width, maxlabel, maxcheckbox;
 972
 973     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 974     wc.lpfnWndProc = DefDlgProc;
 975     wc.cbClsExtra = 0;
 976     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 977     wc.hInstance = fe->inst;
 978     wc.hIcon = NULL;
 979     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 980     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 981     wc.lpszMenuName = NULL;
 982     wc.lpszClassName = "GameConfigBox";
 983     RegisterClass(&wc);
 984
 985     hdc = GetDC(fe->hwnd);
 986     SetMapMode(hdc, MM_TEXT);
 987
 988     fe->dlg_done = FALSE;
 989
 990     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 991                              0, 0, 0, 0,
 992                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 993                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 994                              DEFAULT_QUALITY,
 995                              FF_SWISS,
 996                              "MS Shell Dlg");
 997
 998     oldfont = SelectObject(hdc, fe->cfgfont);
 999     if (GetTextMetrics(hdc, &tm)) {
1000         height = tm.tmAscent + tm.tmDescent;
1001         width = tm.tmAveCharWidth;
1002     } else {
1003         height = width = 30;
1004     }
1005
1006     fe->cfg = midend_get_config(fe->me, which, &title);
1007     fe->cfg_which = which;
1008
1009     /*
1010      * Figure out the layout of the config box by measuring the
1011      * length of each piece of text.
1012      */
1013     maxlabel = maxcheckbox = 0;
1014     winheight = height/2;
1015
1016     for (i = fe->cfg; i->type != C_END; i++) {
1017         switch (i->type) {
1018           case C_STRING:
1019           case C_CHOICES:
1020             /*
1021              * Both these control types have a label filling only
1022              * the left-hand column of the box.
1023              */
1024             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1025                 maxlabel < size.cx)
1026                 maxlabel = size.cx;
1027             winheight += height * 3 / 2 + (height / 2);
1028             break;
1029
1030           case C_BOOLEAN:
1031             /*
1032              * Checkboxes take up the whole of the box width.
1033              */
1034             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
1035                 maxcheckbox < size.cx)
1036                 maxcheckbox = size.cx;
1037             winheight += height + (height / 2);
1038             break;
1039         }
1040     }
1041
1042     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
1043
1044     col1l = 2*width;
1045     col1r = col1l + maxlabel;
1046     col2l = col1r + 2*width;
1047     col2r = col2l + 30*width;
1048     if (col2r < col1l+2*height+maxcheckbox)
1049         col2r = col1l+2*height+maxcheckbox;
1050     winwidth = col2r + 2*width;
1051
1052     SelectObject(hdc, oldfont);
1053     ReleaseDC(fe->hwnd, hdc);
1054
1055     /*
1056      * Create the dialog, now that we know its size.
1057      */
1058     {
1059         RECT r, r2;
1060
1061         r.left = r.top = 0;
1062         r.right = winwidth;
1063         r.bottom = winheight;
1064
1065         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
1066                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1067                                 WS_CAPTION | WS_SYSMENU*/) &~
1068                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
1069                            FALSE, 0);
1070
1071         /*
1072          * Centre the dialog on its parent window.
1073          */
1074         r.right -= r.left;
1075         r.bottom -= r.top;
1076         GetWindowRect(fe->hwnd, &r2);
1077         r.left = (r2.left + r2.right - r.right) / 2;
1078         r.top = (r2.top + r2.bottom - r.bottom) / 2;
1079         r.right += r.left;
1080         r.bottom += r.top;
1081
1082         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
1083                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
1084                                     WS_CAPTION | WS_SYSMENU,
1085                                     r.left, r.top,
1086                                     r.right-r.left, r.bottom-r.top,
1087                                     fe->hwnd, NULL, fe->inst, NULL);
1088         sfree(title);
1089     }
1090
1091     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
1092
1093     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
1094     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
1095
1096     /*
1097      * Count the controls so we can allocate cfgaux.
1098      */
1099     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
1100         nctrls++;
1101     fe->cfgaux = snewn(nctrls, struct cfg_aux);
1102
1103     id = 1000;
1104     y = height/2;
1105     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
1106         switch (i->type) {
1107           case C_STRING:
1108             /*
1109              * Edit box with a label beside it.
1110              */
1111             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1112                    "Static", 0, 0, i->name, id++);
1113             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
1114                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
1115                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1116             SetWindowText(ctl, i->sval);
1117             y += height*3/2;
1118             break;
1119
1120           case C_BOOLEAN:
1121             /*
1122              * Simple checkbox.
1123              */
1124             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
1125                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
1126                    0, i->name, (j->ctlid = id++));
1127             CheckDlgButton(fe->cfgbox, j->ctlid, (i->ival != 0));
1128             y += height;
1129             break;
1130
1131           case C_CHOICES:
1132             /*
1133              * Drop-down list with a label beside it.
1134              */
1135             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
1136                    "STATIC", 0, 0, i->name, id++);
1137             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
1138                          "COMBOBOX", WS_TABSTOP |
1139                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
1140                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
1141             {
1142                 char c, *p, *q, *str;
1143
1144                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
1145                 p = i->sval;
1146                 c = *p++;
1147                 while (*p) {
1148                     q = p;
1149                     while (*q && *q != c) q++;
1150                     str = snewn(q-p+1, char);
1151                     strncpy(str, p, q-p);
1152                     str[q-p] = '\0';
1153                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
1154                     sfree(str);
1155                     if (*q) q++;
1156                     p = q;
1157                 }
1158             }
1159
1160             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
1161
1162             y += height*3/2;
1163             break;
1164         }
1165
1166         assert(y < winheight);
1167         y += height/2;
1168     }
1169
1170     y += height/2;                     /* extra space before OK and Cancel */
1171     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
1172            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
1173            "OK", IDOK);
1174     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
1175            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
1176
1177     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
1178
1179     EnableWindow(fe->hwnd, FALSE);
1180     ShowWindow(fe->cfgbox, SW_NORMAL);
1181     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
1182         if (!IsDialogMessage(fe->cfgbox, &msg))
1183             DispatchMessage(&msg);
1184         if (fe->dlg_done)
1185             break;
1186     }
1187     EnableWindow(fe->hwnd, TRUE);
1188     SetForegroundWindow(fe->hwnd);
1189     DestroyWindow(fe->cfgbox);
1190     DeleteObject(fe->cfgfont);
1191
1192     free_cfg(fe->cfg);
1193     sfree(fe->cfgaux);
1194
1195     return (fe->dlg_done == 2);
1196 }
1197
1198 static void new_game_type(frontend *fe)
1199 {
1200     RECT r, sr;
1201     HDC hdc;
1202     int x, y;
1203
1204     midend_new_game(fe->me);
1205     x = y = INT_MAX;
1206     midend_size(fe->me, &x, &y, FALSE);
1207
1208     r.left = r.top = 0;
1209     r.right = x;
1210     r.bottom = y;
1211     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
1212                        (WS_THICKFRAME | WS_MAXIMIZEBOX |
1213                         WS_OVERLAPPED),
1214                        TRUE, 0);
1215
1216     if (fe->statusbar != NULL) {
1217         GetWindowRect(fe->statusbar, &sr);
1218     } else {
1219         sr.left = sr.right = sr.top = sr.bottom = 0;
1220     }
1221     SetWindowPos(fe->hwnd, NULL, 0, 0,
1222                  r.right - r.left,
1223                  r.bottom - r.top + sr.bottom - sr.top,
1224                  SWP_NOMOVE | SWP_NOZORDER);
1225
1226     check_window_size(fe, &x, &y);
1227
1228     if (fe->statusbar != NULL)
1229         SetWindowPos(fe->statusbar, NULL, 0, y, x,
1230                      sr.bottom - sr.top, SWP_NOZORDER);
1231
1232     DeleteObject(fe->bitmap);
1233
1234     hdc = GetDC(fe->hwnd);
1235     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
1236     ReleaseDC(fe->hwnd, hdc);
1237
1238     midend_redraw(fe->me);
1239 }
1240
1241 static int is_alt_pressed(void)
1242 {
1243     BYTE keystate[256];
1244     int r = GetKeyboardState(keystate);
1245     if (!r)
1246         return FALSE;
1247     if (keystate[VK_MENU] & 0x80)
1248         return TRUE;
1249     if (keystate[VK_RMENU] & 0x80)
1250         return TRUE;
1251     return FALSE;
1252 }
1253
1254 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
1255                                 WPARAM wParam, LPARAM lParam)
1256 {
1257     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
1258
1259     switch (message) {
1260       case WM_CLOSE:
1261         DestroyWindow(hwnd);
1262         return 0;
1263       case WM_COMMAND:
1264         switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
1265           case IDM_NEW:
1266             if (!midend_process_key(fe->me, 0, 0, 'n'))
1267                 PostQuitMessage(0);
1268             break;
1269           case IDM_RESTART:
1270             midend_restart_game(fe->me);
1271             break;
1272           case IDM_UNDO:
1273             if (!midend_process_key(fe->me, 0, 0, 'u'))
1274                 PostQuitMessage(0);
1275             break;
1276           case IDM_REDO:
1277             if (!midend_process_key(fe->me, 0, 0, '\x12'))
1278                 PostQuitMessage(0);
1279             break;
1280           case IDM_COPY:
1281             {
1282                 char *text = midend_text_format(fe->me);
1283                 if (text)
1284                     write_clip(hwnd, text);
1285                 else
1286                     MessageBeep(MB_ICONWARNING);
1287                 sfree(text);
1288             }
1289             break;
1290           case IDM_SOLVE:
1291             {
1292                 char *msg = midend_solve(fe->me);
1293                 if (msg)
1294                     MessageBox(hwnd, msg, "Unable to solve",
1295                                MB_ICONERROR | MB_OK);
1296             }
1297             break;
1298           case IDM_QUIT:
1299             if (!midend_process_key(fe->me, 0, 0, 'q'))
1300                 PostQuitMessage(0);
1301             break;
1302           case IDM_CONFIG:
1303             if (get_config(fe, CFG_SETTINGS))
1304                 new_game_type(fe);
1305             break;
1306           case IDM_SEED:
1307             if (get_config(fe, CFG_SEED))
1308                 new_game_type(fe);
1309             break;
1310           case IDM_DESC:
1311             if (get_config(fe, CFG_DESC))
1312                 new_game_type(fe);
1313             break;
1314           case IDM_ABOUT:
1315             about(fe);
1316             break;
1317           case IDM_HELPC:
1318             assert(fe->help_path);
1319             WinHelp(hwnd, fe->help_path,
1320                     fe->help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
1321             break;
1322           case IDM_GAMEHELP:
1323             assert(fe->help_path);
1324             assert(thegame.winhelp_topic);
1325             {
1326                 char *cmd = snewn(10+strlen(thegame.winhelp_topic), char);
1327                 sprintf(cmd, "JI(`',`%s')", thegame.winhelp_topic);
1328                 WinHelp(hwnd, fe->help_path, HELP_COMMAND, (DWORD)cmd);
1329                 sfree(cmd);
1330             }
1331             break;
1332           default:
1333             {
1334                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
1335
1336                 if (p >= 0 && p < fe->npresets) {
1337                     midend_set_params(fe->me, fe->presets[p]);
1338                     new_game_type(fe);
1339                 }
1340             }
1341             break;
1342         }
1343         break;
1344       case WM_DESTROY:
1345         PostQuitMessage(0);
1346         return 0;
1347       case WM_PAINT:
1348         {
1349             PAINTSTRUCT p;
1350             HDC hdc, hdc2;
1351             HBITMAP prevbm;
1352
1353             hdc = BeginPaint(hwnd, &p);
1354             hdc2 = CreateCompatibleDC(hdc);
1355             prevbm = SelectObject(hdc2, fe->bitmap);
1356             BitBlt(hdc,
1357                    p.rcPaint.left, p.rcPaint.top,
1358                    p.rcPaint.right - p.rcPaint.left,
1359                    p.rcPaint.bottom - p.rcPaint.top,
1360                    hdc2,
1361                    p.rcPaint.left, p.rcPaint.top,
1362                    SRCCOPY);
1363             SelectObject(hdc2, prevbm);
1364             DeleteDC(hdc2);
1365             EndPaint(hwnd, &p);
1366         }
1367         return 0;
1368       case WM_KEYDOWN:
1369         {
1370             int key = -1;
1371             BYTE keystate[256];
1372             int r = GetKeyboardState(keystate);
1373             int shift = (r && (keystate[VK_SHIFT] & 0x80)) ? MOD_SHFT : 0;
1374             int ctrl = (r && (keystate[VK_CONTROL] & 0x80)) ? MOD_CTRL : 0;
1375
1376             switch (wParam) {
1377               case VK_LEFT:
1378                 if (!(lParam & 0x01000000))
1379                     key = MOD_NUM_KEYPAD | '4';
1380                 else
1381                     key = shift | ctrl | CURSOR_LEFT;
1382                 break;
1383               case VK_RIGHT:
1384                 if (!(lParam & 0x01000000))
1385                     key = MOD_NUM_KEYPAD | '6';
1386                 else
1387                     key = shift | ctrl | CURSOR_RIGHT;
1388                 break;
1389               case VK_UP:
1390                 if (!(lParam & 0x01000000))
1391                     key = MOD_NUM_KEYPAD | '8';
1392                 else
1393                     key = shift | ctrl | CURSOR_UP;
1394                 break;
1395               case VK_DOWN:
1396                 if (!(lParam & 0x01000000))
1397                     key = MOD_NUM_KEYPAD | '2';
1398                 else
1399                     key = shift | ctrl | CURSOR_DOWN;
1400                 break;
1401                 /*
1402                  * Diagonal keys on the numeric keypad.
1403                  */
1404               case VK_PRIOR:
1405                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '9';
1406                 break;
1407               case VK_NEXT:
1408                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '3';
1409                 break;
1410               case VK_HOME:
1411                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '7';
1412                 break;
1413               case VK_END:
1414                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '1';
1415                 break;
1416               case VK_INSERT:
1417                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '0';
1418                 break;
1419               case VK_CLEAR:
1420                 if (!(lParam & 0x01000000)) key = MOD_NUM_KEYPAD | '5';
1421                 break;
1422                 /*
1423                  * Numeric keypad keys with Num Lock on.
1424                  */
1425               case VK_NUMPAD4: key = MOD_NUM_KEYPAD | '4'; break;
1426               case VK_NUMPAD6: key = MOD_NUM_KEYPAD | '6'; break;
1427               case VK_NUMPAD8: key = MOD_NUM_KEYPAD | '8'; break;
1428               case VK_NUMPAD2: key = MOD_NUM_KEYPAD | '2'; break;
1429               case VK_NUMPAD5: key = MOD_NUM_KEYPAD | '5'; break;
1430               case VK_NUMPAD9: key = MOD_NUM_KEYPAD | '9'; break;
1431               case VK_NUMPAD3: key = MOD_NUM_KEYPAD | '3'; break;
1432               case VK_NUMPAD7: key = MOD_NUM_KEYPAD | '7'; break;
1433               case VK_NUMPAD1: key = MOD_NUM_KEYPAD | '1'; break;
1434               case VK_NUMPAD0: key = MOD_NUM_KEYPAD | '0'; break;
1435             }
1436
1437             if (key != -1) {
1438                 if (!midend_process_key(fe->me, 0, 0, key))
1439                     PostQuitMessage(0);
1440             } else {
1441                 MSG m;
1442                 m.hwnd = hwnd;
1443                 m.message = WM_KEYDOWN;
1444                 m.wParam = wParam;
1445                 m.lParam = lParam & 0xdfff;
1446                 TranslateMessage(&m);
1447             }
1448         }
1449         break;
1450       case WM_LBUTTONDOWN:
1451       case WM_RBUTTONDOWN:
1452       case WM_MBUTTONDOWN:
1453         {
1454             int button;
1455
1456             /*
1457              * Shift-clicks count as middle-clicks, since otherwise
1458              * two-button Windows users won't have any kind of
1459              * middle click to use.
1460              */
1461             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
1462                 button = MIDDLE_BUTTON;
1463             else if (message == WM_RBUTTONDOWN || is_alt_pressed())
1464                 button = RIGHT_BUTTON;
1465             else
1466                 button = LEFT_BUTTON;
1467
1468             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1469                                     (signed short)HIWORD(lParam), button))
1470                 PostQuitMessage(0);
1471
1472             SetCapture(hwnd);
1473         }
1474         break;
1475       case WM_LBUTTONUP:
1476       case WM_RBUTTONUP:
1477       case WM_MBUTTONUP:
1478         {
1479             int button;
1480
1481             /*
1482              * Shift-clicks count as middle-clicks, since otherwise
1483              * two-button Windows users won't have any kind of
1484              * middle click to use.
1485              */
1486             if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
1487                 button = MIDDLE_RELEASE;
1488             else if (message == WM_RBUTTONUP || is_alt_pressed())
1489                 button = RIGHT_RELEASE;
1490             else
1491                 button = LEFT_RELEASE;
1492
1493             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1494                                     (signed short)HIWORD(lParam), button))
1495                 PostQuitMessage(0);
1496
1497             ReleaseCapture();
1498         }
1499         break;
1500       case WM_MOUSEMOVE:
1501         {
1502             int button;
1503
1504             if (wParam & (MK_MBUTTON | MK_SHIFT))
1505                 button = MIDDLE_DRAG;
1506             else if (wParam & MK_RBUTTON || is_alt_pressed())
1507                 button = RIGHT_DRAG;
1508             else
1509                 button = LEFT_DRAG;
1510
1511             if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
1512                                     (signed short)HIWORD(lParam), button))
1513                 PostQuitMessage(0);
1514         }
1515         break;
1516       case WM_CHAR:
1517         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
1518             PostQuitMessage(0);
1519         return 0;
1520       case WM_TIMER:
1521         if (fe->timer) {
1522             DWORD now = GetTickCount();
1523             float elapsed = (float) (now - fe->timer_last_tickcount) * 0.001F;
1524             midend_timer(fe->me, elapsed);
1525             fe->timer_last_tickcount = now;
1526         }
1527         return 0;
1528     }
1529
1530     return DefWindowProc(hwnd, message, wParam, lParam);
1531 }
1532
1533 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
1534 {
1535     MSG msg;
1536     char *error;
1537
1538     InitCommonControls();
1539
1540     if (!prev) {
1541         WNDCLASS wndclass;
1542
1543         wndclass.style = 0;
1544         wndclass.lpfnWndProc = WndProc;
1545         wndclass.cbClsExtra = 0;
1546         wndclass.cbWndExtra = 0;
1547         wndclass.hInstance = inst;
1548         wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
1549         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
1550         wndclass.hbrBackground = NULL;
1551         wndclass.lpszMenuName = NULL;
1552         wndclass.lpszClassName = thegame.name;
1553
1554         RegisterClass(&wndclass);
1555     }
1556
1557     while (*cmdline && isspace(*cmdline))
1558         cmdline++;
1559
1560     if (!new_window(inst, *cmdline ? cmdline : NULL, &error)) {
1561         char buf[128];
1562         sprintf(buf, "%.100s Error", thegame.name);
1563         MessageBox(NULL, error, buf, MB_OK|MB_ICONERROR);
1564         return 1;
1565     }
1566
1567     while (GetMessage(&msg, NULL, 0, 0)) {
1568         DispatchMessage(&msg);
1569     }
1570
1571     return msg.wParam;
1572 }