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