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