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 <stdarg.h>
  11 #include <stdlib.h>
  12 #include <time.h>
  13
  14 #include "puzzles.h"
  15
  16 #define IDM_NEW       0x0010
  17 #define IDM_RESTART   0x0020
  18 #define IDM_UNDO      0x0030
  19 #define IDM_REDO      0x0040
  20 #define IDM_QUIT      0x0050
  21 #define IDM_CONFIG    0x0060
  22 #define IDM_SEED      0x0070
  23 #define IDM_PRESETS   0x0100
  24
  25 #ifdef DEBUG
  26 static FILE *debug_fp = NULL;
  27 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
  28 static int debug_got_console = 0;
  29
  30 void dputs(char *buf)
  31 {
  32     DWORD dw;
  33
  34     if (!debug_got_console) {
  35         if (AllocConsole()) {
  36             debug_got_console = 1;
  37             debug_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
  38         }
  39     }
  40     if (!debug_fp) {
  41         debug_fp = fopen("debug.log", "w");
  42     }
  43
  44     if (debug_hdl != INVALID_HANDLE_VALUE) {
  45         WriteFile(debug_hdl, buf, strlen(buf), &dw, NULL);
  46     }
  47     fputs(buf, debug_fp);
  48     fflush(debug_fp);
  49 }
  50
  51 void debug_printf(char *fmt, ...)
  52 {
  53     char buf[4096];
  54     va_list ap;
  55
  56     va_start(ap, fmt);
  57     vsprintf(buf, fmt, ap);
  58     dputs(buf);
  59     va_end(ap);
  60 }
  61
  62 #define debug(x) (debug_printf x)
  63
  64 #else
  65
  66 #define debug(x)
  67
  68 #endif
  69
  70 struct font {
  71     HFONT font;
  72     int type;
  73     int size;
  74 };
  75
  76 struct cfg_aux {
  77     int ctlid;
  78 };
  79
  80 struct frontend {
  81     midend_data *me;
  82     HWND hwnd, statusbar, cfgbox;
  83     HINSTANCE inst;
  84     HBITMAP bitmap, prevbm;
  85     HDC hdc_bm;
  86     COLORREF *colours;
  87     HBRUSH *brushes;
  88     HPEN *pens;
  89     HRGN clip;
  90     UINT timer;
  91     int npresets;
  92     game_params **presets;
  93     struct font *fonts;
  94     int nfonts, fontsize;
  95     config_item *cfg;
  96     struct cfg_aux *cfgaux;
  97     int cfg_which, cfg_done;
  98     HFONT cfgfont;
  99 };
 100
 101 void fatal(char *fmt, ...)
 102 {
 103     char buf[2048];
 104     va_list ap;
 105
 106     va_start(ap, fmt);
 107     vsprintf(buf, fmt, ap);
 108     va_end(ap);
 109
 110     MessageBox(NULL, buf, "Fatal error", MB_ICONEXCLAMATION | MB_OK);
 111
 112     exit(1);
 113 }
 114
 115 void status_bar(frontend *fe, char *text)
 116 {
 117     SetWindowText(fe->statusbar, text);
 118 }
 119
 120 void frontend_default_colour(frontend *fe, float *output)
 121 {
 122     DWORD c = GetSysColor(COLOR_MENU); /* ick */
 123
 124     output[0] = (float)(GetRValue(c) / 255.0);
 125     output[1] = (float)(GetGValue(c) / 255.0);
 126     output[2] = (float)(GetBValue(c) / 255.0);
 127 }
 128
 129 void clip(frontend *fe, int x, int y, int w, int h)
 130 {
 131     if (!fe->clip) {
 132         fe->clip = CreateRectRgn(0, 0, 1, 1);
 133         GetClipRgn(fe->hdc_bm, fe->clip);
 134     }
 135
 136     IntersectClipRect(fe->hdc_bm, x, y, x+w, y+h);
 137 }
 138
 139 void unclip(frontend *fe)
 140 {
 141     assert(fe->clip);
 142     SelectClipRgn(fe->hdc_bm, fe->clip);
 143 }
 144
 145 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 146                int align, int colour, char *text)
 147 {
 148     int i;
 149
 150     /*
 151      * Find or create the font.
 152      */
 153     for (i = 0; i < fe->nfonts; i++)
 154         if (fe->fonts[i].type == fonttype && fe->fonts[i].size == fontsize)
 155             break;
 156
 157     if (i == fe->nfonts) {
 158         if (fe->fontsize <= fe->nfonts) {
 159             fe->fontsize = fe->nfonts + 10;
 160             fe->fonts = sresize(fe->fonts, fe->fontsize, struct font);
 161         }
 162
 163         fe->nfonts++;
 164
 165         fe->fonts[i].type = fonttype;
 166         fe->fonts[i].size = fontsize;
 167
 168         /*
 169          * FIXME: Really I should make at least _some_ effort to
 170          * pick the correct font.
 171          */
 172         fe->fonts[i].font = CreateFont(-fontsize, 0, 0, 0, 0,
 173                                        FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 174                                        OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 175                                        DEFAULT_QUALITY,
 176                                        (fonttype == FONT_FIXED ?
 177                                         FIXED_PITCH | FF_DONTCARE :
 178                                         VARIABLE_PITCH | FF_SWISS),
 179                                        NULL);
 180     }
 181
 182     /*
 183      * Position and draw the text.
 184      */
 185     {
 186         HFONT oldfont;
 187         TEXTMETRIC tm;
 188         SIZE size;
 189
 190         oldfont = SelectObject(fe->hdc_bm, fe->fonts[i].font);
 191         if (GetTextMetrics(fe->hdc_bm, &tm)) {
 192             if (align & ALIGN_VCENTRE)
 193                 y -= (tm.tmAscent+tm.tmDescent)/2;
 194             else
 195                 y -= tm.tmAscent;
 196         }
 197         if (GetTextExtentPoint32(fe->hdc_bm, text, strlen(text), &size)) {
 198             if (align & ALIGN_HCENTRE)
 199                 x -= size.cx / 2;
 200             else if (align & ALIGN_HRIGHT)
 201                 x -= size.cx;
 202         }
 203         SetBkMode(fe->hdc_bm, TRANSPARENT);
 204         TextOut(fe->hdc_bm, x, y, text, strlen(text));
 205         SelectObject(fe->hdc_bm, oldfont);
 206     }
 207 }
 208
 209 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour)
 210 {
 211     if (w == 1 && h == 1) {
 212         /*
 213          * Rectangle() appears to get uppity if asked to draw a 1x1
 214          * rectangle, presumably on the grounds that that's beneath
 215          * its dignity and you ought to be using SetPixel instead.
 216          * So I will.
 217          */
 218         SetPixel(fe->hdc_bm, x, y, fe->colours[colour]);
 219     } else {
 220         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 221         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 222         Rectangle(fe->hdc_bm, x, y, x+w, y+h);
 223         SelectObject(fe->hdc_bm, oldbrush);
 224         SelectObject(fe->hdc_bm, oldpen);
 225     }
 226 }
 227
 228 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour)
 229 {
 230     HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 231     MoveToEx(fe->hdc_bm, x1, y1, NULL);
 232     LineTo(fe->hdc_bm, x2, y2);
 233     SetPixel(fe->hdc_bm, x2, y2, fe->colours[colour]);
 234     SelectObject(fe->hdc_bm, oldpen);
 235 }
 236
 237 void draw_polygon(frontend *fe, int *coords, int npoints,
 238                   int fill, int colour)
 239 {
 240     POINT *pts = snewn(npoints+1, POINT);
 241     int i;
 242
 243     for (i = 0; i <= npoints; i++) {
 244         int j = (i < npoints ? i : 0);
 245         pts[i].x = coords[j*2];
 246         pts[i].y = coords[j*2+1];
 247     }
 248
 249     if (fill) {
 250         HBRUSH oldbrush = SelectObject(fe->hdc_bm, fe->brushes[colour]);
 251         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 252         Polygon(fe->hdc_bm, pts, npoints);
 253         SelectObject(fe->hdc_bm, oldbrush);
 254         SelectObject(fe->hdc_bm, oldpen);
 255     } else {
 256         HPEN oldpen = SelectObject(fe->hdc_bm, fe->pens[colour]);
 257         Polyline(fe->hdc_bm, pts, npoints+1);
 258         SelectObject(fe->hdc_bm, oldpen);
 259     }
 260
 261     sfree(pts);
 262 }
 263
 264 void start_draw(frontend *fe)
 265 {
 266     HDC hdc_win;
 267     hdc_win = GetDC(fe->hwnd);
 268     fe->hdc_bm = CreateCompatibleDC(hdc_win);
 269     fe->prevbm = SelectObject(fe->hdc_bm, fe->bitmap);
 270     ReleaseDC(fe->hwnd, hdc_win);
 271     fe->clip = NULL;
 272     SetMapMode(fe->hdc_bm, MM_TEXT);
 273 }
 274
 275 void draw_update(frontend *fe, int x, int y, int w, int h)
 276 {
 277     RECT r;
 278
 279     r.left = x;
 280     r.top = y;
 281     r.right = x + w;
 282     r.bottom = y + h;
 283
 284     InvalidateRect(fe->hwnd, &r, FALSE);
 285 }
 286
 287 void end_draw(frontend *fe)
 288 {
 289     SelectObject(fe->hdc_bm, fe->prevbm);
 290     DeleteDC(fe->hdc_bm);
 291     if (fe->clip) {
 292         DeleteObject(fe->clip);
 293         fe->clip = NULL;
 294     }
 295 }
 296
 297 void deactivate_timer(frontend *fe)
 298 {
 299     KillTimer(fe->hwnd, fe->timer);
 300     fe->timer = 0;
 301 }
 302
 303 void activate_timer(frontend *fe)
 304 {
 305     fe->timer = SetTimer(fe->hwnd, fe->timer, 20, NULL);
 306 }
 307
 308 static frontend *new_window(HINSTANCE inst)
 309 {
 310     frontend *fe;
 311     int x, y;
 312     RECT r, sr;
 313     HDC hdc;
 314
 315     fe = snew(frontend);
 316     fe->me = midend_new(fe);
 317     fe->inst = inst;
 318     midend_new_game(fe->me);
 319     midend_size(fe->me, &x, &y);
 320
 321     fe->timer = 0;
 322
 323     {
 324         int i, ncolours;
 325         float *colours;
 326
 327         colours = midend_colours(fe->me, &ncolours);
 328
 329         fe->colours = snewn(ncolours, COLORREF);
 330         fe->brushes = snewn(ncolours, HBRUSH);
 331         fe->pens = snewn(ncolours, HPEN);
 332
 333         for (i = 0; i < ncolours; i++) {
 334             fe->colours[i] = RGB(255 * colours[i*3+0],
 335                                  255 * colours[i*3+1],
 336                                  255 * colours[i*3+2]);
 337             fe->brushes[i] = CreateSolidBrush(fe->colours[i]);
 338             fe->pens[i] = CreatePen(PS_SOLID, 1, fe->colours[i]);
 339         }
 340     }
 341
 342     r.left = r.top = 0;
 343     r.right = x;
 344     r.bottom = y;
 345     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 346                        (WS_THICKFRAME | WS_MAXIMIZEBOX | WS_OVERLAPPED),
 347                        TRUE, 0);
 348
 349     fe->hwnd = CreateWindowEx(0, game_name, game_name,
 350                               WS_OVERLAPPEDWINDOW &~
 351                               (WS_THICKFRAME | WS_MAXIMIZEBOX),
 352                               CW_USEDEFAULT, CW_USEDEFAULT,
 353                               r.right - r.left, r.bottom - r.top,
 354                               NULL, NULL, inst, NULL);
 355
 356     {
 357         HMENU bar = CreateMenu();
 358         HMENU menu = CreateMenu();
 359
 360         AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)menu, "Game");
 361         AppendMenu(menu, MF_ENABLED, IDM_NEW, "New");
 362         AppendMenu(menu, MF_ENABLED, IDM_RESTART, "Restart");
 363         AppendMenu(menu, MF_ENABLED, IDM_SEED, "Specific...");
 364
 365         if ((fe->npresets = midend_num_presets(fe->me)) > 0 ||
 366             game_can_configure) {
 367             HMENU sub = CreateMenu();
 368             int i;
 369
 370             AppendMenu(bar, MF_ENABLED|MF_POPUP, (UINT)sub, "Type");
 371
 372             fe->presets = snewn(fe->npresets, game_params *);
 373
 374             for (i = 0; i < fe->npresets; i++) {
 375                 char *name;
 376
 377                 midend_fetch_preset(fe->me, i, &name, &fe->presets[i]);
 378
 379                 /*
 380                  * FIXME: we ought to go through and do something
 381                  * with ampersands here.
 382                  */
 383
 384                 AppendMenu(sub, MF_ENABLED, IDM_PRESETS + 0x10 * i, name);
 385             }
 386
 387             if (game_can_configure) {
 388                 AppendMenu(sub, MF_ENABLED, IDM_CONFIG, "Custom...");
 389             }
 390         }
 391
 392         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 393         AppendMenu(menu, MF_ENABLED, IDM_UNDO, "Undo");
 394         AppendMenu(menu, MF_ENABLED, IDM_REDO, "Redo");
 395         AppendMenu(menu, MF_SEPARATOR, 0, 0);
 396         AppendMenu(menu, MF_ENABLED, IDM_QUIT, "Exit");
 397         SetMenu(fe->hwnd, bar);
 398     }
 399
 400     if (midend_wants_statusbar(fe->me)) {
 401         fe->statusbar = CreateWindowEx(0, STATUSCLASSNAME, "ooh",
 402                                        WS_CHILD | WS_VISIBLE,
 403                                        0, 0, 0, 0, /* status bar does these */
 404                                        fe->hwnd, NULL, inst, NULL);
 405         GetWindowRect(fe->statusbar, &sr);
 406         SetWindowPos(fe->hwnd, NULL, 0, 0,
 407                      r.right - r.left, r.bottom - r.top + sr.bottom - sr.top,
 408                      SWP_NOMOVE | SWP_NOZORDER);
 409         SetWindowPos(fe->statusbar, NULL, 0, y, x, sr.bottom - sr.top,
 410                      SWP_NOZORDER);
 411     } else {
 412         fe->statusbar = NULL;
 413     }
 414
 415     hdc = GetDC(fe->hwnd);
 416     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 417     ReleaseDC(fe->hwnd, hdc);
 418
 419     SetWindowLong(fe->hwnd, GWL_USERDATA, (LONG)fe);
 420
 421     ShowWindow(fe->hwnd, SW_NORMAL);
 422     SetForegroundWindow(fe->hwnd);
 423
 424     midend_redraw(fe->me);
 425
 426     return fe;
 427 }
 428
 429 static int CALLBACK ConfigDlgProc(HWND hwnd, UINT msg,
 430                                   WPARAM wParam, LPARAM lParam)
 431 {
 432     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 433     config_item *i;
 434     struct cfg_aux *j;
 435
 436     switch (msg) {
 437       case WM_INITDIALOG:
 438         return 0;
 439
 440       case WM_COMMAND:
 441         /*
 442          * OK and Cancel are special cases.
 443          */
 444         if ((HIWORD(wParam) == BN_CLICKED ||
 445              HIWORD(wParam) == BN_DOUBLECLICKED) &&
 446             (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)) {
 447             if (LOWORD(wParam) == IDOK) {
 448                 char *err = midend_set_config(fe->me, fe->cfg_which, fe->cfg);
 449
 450                 if (err) {
 451                     MessageBox(hwnd, err, "Validation error",
 452                                MB_ICONERROR | MB_OK);
 453                 } else {
 454                     fe->cfg_done = 2;
 455                 }
 456             } else {
 457                 fe->cfg_done = 1;
 458             }
 459             return 0;
 460         }
 461
 462         /*
 463          * First find the control whose id this is.
 464          */
 465         for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 466             if (j->ctlid == LOWORD(wParam))
 467                 break;
 468         }
 469         if (i->type == C_END)
 470             return 0;                  /* not our problem */
 471
 472         if (i->type == C_STRING && HIWORD(wParam) == EN_CHANGE) {
 473             char buffer[4096];
 474             GetDlgItemText(fe->cfgbox, j->ctlid, buffer, lenof(buffer));
 475             buffer[lenof(buffer)-1] = '\0';
 476             sfree(i->sval);
 477             i->sval = dupstr(buffer);
 478         } else if (i->type == C_BOOLEAN &&
 479                    (HIWORD(wParam) == BN_CLICKED ||
 480                     HIWORD(wParam) == BN_DOUBLECLICKED)) {
 481             i->ival = IsDlgButtonChecked(fe->cfgbox, j->ctlid);
 482         } else if (i->type == C_CHOICES &&
 483                    HIWORD(wParam) == CBN_SELCHANGE) {
 484             i->ival = SendDlgItemMessage(fe->cfgbox, j->ctlid,
 485                                          CB_GETCURSEL, 0, 0);
 486         }
 487
 488         return 0;
 489
 490       case WM_CLOSE:
 491         fe->cfg_done = 1;
 492         return 0;
 493     }
 494
 495     return 0;
 496 }
 497
 498 HWND mkctrl(frontend *fe, int x1, int x2, int y1, int y2,
 499             char *wclass, int wstyle,
 500             int exstyle, char *wtext, int wid)
 501 {
 502     HWND ret;
 503     ret = CreateWindowEx(exstyle, wclass, wtext,
 504                          wstyle | WS_CHILD | WS_VISIBLE, x1, y1, x2-x1, y2-y1,
 505                          fe->cfgbox, (HMENU) wid, fe->inst, NULL);
 506     SendMessage(ret, WM_SETFONT, (WPARAM)fe->cfgfont, MAKELPARAM(TRUE, 0));
 507     return ret;
 508 }
 509
 510 static int get_config(frontend *fe, int which)
 511 {
 512     config_item *i;
 513     struct cfg_aux *j;
 514     char *title;
 515     WNDCLASS wc;
 516     MSG msg;
 517     TEXTMETRIC tm;
 518     HDC hdc;
 519     HFONT oldfont;
 520     SIZE size;
 521     HWND ctl;
 522     int gm, id, nctrls;
 523     int winwidth, winheight, col1l, col1r, col2l, col2r, y;
 524     int height, width, maxlabel, maxcheckbox;
 525
 526     wc.style = CS_DBLCLKS | CS_SAVEBITS | CS_BYTEALIGNWINDOW;
 527     wc.lpfnWndProc = DefDlgProc;
 528     wc.cbClsExtra = 0;
 529     wc.cbWndExtra = DLGWINDOWEXTRA + 8;
 530     wc.hInstance = fe->inst;
 531     wc.hIcon = NULL;
 532     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 533     wc.hbrBackground = (HBRUSH) (COLOR_BACKGROUND +1);
 534     wc.lpszMenuName = NULL;
 535     wc.lpszClassName = "GameConfigBox";
 536     RegisterClass(&wc);
 537
 538     hdc = GetDC(fe->hwnd);
 539     SetMapMode(hdc, MM_TEXT);
 540
 541     fe->cfg_done = FALSE;
 542
 543     fe->cfgfont = CreateFont(-MulDiv(8, GetDeviceCaps(hdc, LOGPIXELSY), 72),
 544                              0, 0, 0, 0,
 545                              FALSE, FALSE, FALSE, DEFAULT_CHARSET,
 546                              OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
 547                              DEFAULT_QUALITY,
 548                              FF_SWISS,
 549                              "MS Shell Dlg");
 550
 551     oldfont = SelectObject(hdc, fe->cfgfont);
 552     if (GetTextMetrics(hdc, &tm)) {
 553         height = tm.tmAscent + tm.tmDescent;
 554         width = tm.tmAveCharWidth;
 555     } else {
 556         height = width = 30;
 557     }
 558
 559     fe->cfg = midend_get_config(fe->me, which, &title);
 560     fe->cfg_which = which;
 561
 562     /*
 563      * Figure out the layout of the config box by measuring the
 564      * length of each piece of text.
 565      */
 566     maxlabel = maxcheckbox = 0;
 567     winheight = height/2;
 568
 569     for (i = fe->cfg; i->type != C_END; i++) {
 570         switch (i->type) {
 571           case C_STRING:
 572           case C_CHOICES:
 573             /*
 574              * Both these control types have a label filling only
 575              * the left-hand column of the box.
 576              */
 577             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
 578                 maxlabel < size.cx)
 579                 maxlabel = size.cx;
 580             winheight += height * 3 / 2 + (height / 2);
 581             break;
 582
 583           case C_BOOLEAN:
 584             /*
 585              * Checkboxes take up the whole of the box width.
 586              */
 587             if (GetTextExtentPoint32(hdc, i->name, strlen(i->name), &size) &&
 588                 maxcheckbox < size.cx)
 589                 maxcheckbox = size.cx;
 590             winheight += height + (height / 2);
 591             break;
 592         }
 593     }
 594
 595     winheight += height + height * 7 / 4;      /* OK / Cancel buttons */
 596
 597     col1l = 2*width;
 598     col1r = col1l + maxlabel;
 599     col2l = col1r + 2*width;
 600     col2r = col2l + 30*width;
 601     if (col2r < col1l+2*height+maxcheckbox)
 602         col2r = col1l+2*height+maxcheckbox;
 603     winwidth = col2r + 2*width;
 604
 605     ReleaseDC(fe->hwnd, hdc);
 606
 607     /*
 608      * Create the dialog, now that we know its size.
 609      */
 610     {
 611         RECT r, r2;
 612
 613         r.left = r.top = 0;
 614         r.right = winwidth;
 615         r.bottom = winheight;
 616
 617         AdjustWindowRectEx(&r, (WS_OVERLAPPEDWINDOW /*|
 618                                 DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 619                                 WS_CAPTION | WS_SYSMENU*/) &~
 620                            (WS_MAXIMIZEBOX | WS_OVERLAPPED),
 621                            FALSE, 0);
 622
 623         /*
 624          * Centre the dialog on its parent window.
 625          */
 626         r.right -= r.left;
 627         r.bottom -= r.top;
 628         GetWindowRect(fe->hwnd, &r2);
 629         r.left = (r2.left + r2.right - r.right) / 2;
 630         r.top = (r2.top + r2.bottom - r.bottom) / 2;
 631         r.right += r.left;
 632         r.bottom += r.top;
 633
 634         fe->cfgbox = CreateWindowEx(0, wc.lpszClassName, title,
 635                                     DS_MODALFRAME | WS_POPUP | WS_VISIBLE |
 636                                     WS_CAPTION | WS_SYSMENU,
 637                                     r.left, r.top,
 638                                     r.right-r.left, r.bottom-r.top,
 639                                     fe->hwnd, NULL, fe->inst, NULL);
 640         sfree(title);
 641     }
 642
 643     SendMessage(fe->cfgbox, WM_SETFONT, (WPARAM)fe->cfgfont, FALSE);
 644
 645     SetWindowLong(fe->cfgbox, GWL_USERDATA, (LONG)fe);
 646     SetWindowLong(fe->cfgbox, DWL_DLGPROC, (LONG)ConfigDlgProc);
 647
 648     /*
 649      * Count the controls so we can allocate cfgaux.
 650      */
 651     for (nctrls = 0, i = fe->cfg; i->type != C_END; i++)
 652         nctrls++;
 653     fe->cfgaux = snewn(nctrls, struct cfg_aux);
 654
 655     id = 1000;
 656     y = height/2;
 657     for (i = fe->cfg, j = fe->cfgaux; i->type != C_END; i++, j++) {
 658         switch (i->type) {
 659           case C_STRING:
 660             /*
 661              * Edit box with a label beside it.
 662              */
 663             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
 664                    "Static", 0, 0, i->name, id++);
 665             ctl = mkctrl(fe, col2l, col2r, y, y+height*3/2,
 666                          "EDIT", WS_TABSTOP | ES_AUTOHSCROLL,
 667                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
 668             SetWindowText(ctl, i->sval);
 669             y += height*3/2;
 670             break;
 671
 672           case C_BOOLEAN:
 673             /*
 674              * Simple checkbox.
 675              */
 676             mkctrl(fe, col1l, col2r, y, y+height, "BUTTON",
 677                    BS_NOTIFY | BS_AUTOCHECKBOX | WS_TABSTOP,
 678                    0, i->name, (j->ctlid = id++));
 679             y += height;
 680             break;
 681
 682           case C_CHOICES:
 683             /*
 684              * Drop-down list with a label beside it.
 685              */
 686             mkctrl(fe, col1l, col1r, y+height*1/8, y+height*9/8,
 687                    "STATIC", 0, 0, i->name, id++);
 688             ctl = mkctrl(fe, col2l, col2r, y, y+height*41/2,
 689                          "COMBOBOX", WS_TABSTOP |
 690                          CBS_DROPDOWNLIST | CBS_HASSTRINGS,
 691                          WS_EX_CLIENTEDGE, "", (j->ctlid = id++));
 692             {
 693                 char c, *p, *q, *str;
 694
 695                 SendMessage(ctl, CB_RESETCONTENT, 0, 0);
 696                 p = i->sval;
 697                 c = *p++;
 698                 while (*p) {
 699                     q = p;
 700                     while (*q && *q != c) q++;
 701                     str = snewn(q-p+1, char);
 702                     strncpy(str, p, q-p);
 703                     str[q-p] = '\0';
 704                     SendMessage(ctl, CB_ADDSTRING, 0, (LPARAM)str);
 705                     sfree(str);
 706                     if (*q) q++;
 707                     p = q;
 708                 }
 709             }
 710
 711             SendMessage(ctl, CB_SETCURSEL, i->ival, 0);
 712
 713             y += height*3/2;
 714             break;
 715         }
 716
 717         assert(y < winheight);
 718         y += height/2;
 719     }
 720
 721     y += height/2;                     /* extra space before OK and Cancel */
 722     mkctrl(fe, col1l, (col1l+col2r)/2-width, y, y+height*7/4, "BUTTON",
 723            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP | BS_DEFPUSHBUTTON, 0,
 724            "OK", IDOK);
 725     mkctrl(fe, (col1l+col2r)/2+width, col2r, y, y+height*7/4, "BUTTON",
 726            BS_PUSHBUTTON | BS_NOTIFY | WS_TABSTOP, 0, "Cancel", IDCANCEL);
 727
 728     SendMessage(fe->cfgbox, WM_INITDIALOG, 0, 0);
 729
 730     EnableWindow(fe->hwnd, FALSE);
 731     ShowWindow(fe->cfgbox, SW_NORMAL);
 732     while ((gm=GetMessage(&msg, NULL, 0, 0)) > 0) {
 733         if (!IsDialogMessage(fe->cfgbox, &msg))
 734             DispatchMessage(&msg);
 735         if (fe->cfg_done)
 736             break;
 737     }
 738     EnableWindow(fe->hwnd, TRUE);
 739     SetForegroundWindow(fe->hwnd);
 740     DestroyWindow(fe->cfgbox);
 741     DeleteObject(fe->cfgfont);
 742
 743     free_cfg(fe->cfg);
 744     sfree(fe->cfgaux);
 745
 746     return (fe->cfg_done == 2);
 747 }
 748
 749 static void new_game_type(frontend *fe)
 750 {
 751     RECT r, sr;
 752     HDC hdc;
 753     int x, y;
 754
 755     midend_new_game(fe->me);
 756     midend_size(fe->me, &x, &y);
 757
 758     r.left = r.top = 0;
 759     r.right = x;
 760     r.bottom = y;
 761     AdjustWindowRectEx(&r, WS_OVERLAPPEDWINDOW &~
 762                        (WS_THICKFRAME | WS_MAXIMIZEBOX |
 763                         WS_OVERLAPPED),
 764                        TRUE, 0);
 765
 766     if (fe->statusbar != NULL) {
 767         GetWindowRect(fe->statusbar, &sr);
 768     } else {
 769         sr.left = sr.right = sr.top = sr.bottom = 0;
 770     }
 771     SetWindowPos(fe->hwnd, NULL, 0, 0,
 772                  r.right - r.left,
 773                  r.bottom - r.top + sr.bottom - sr.top,
 774                  SWP_NOMOVE | SWP_NOZORDER);
 775     if (fe->statusbar != NULL)
 776         SetWindowPos(fe->statusbar, NULL, 0, y, x,
 777                      sr.bottom - sr.top, SWP_NOZORDER);
 778
 779     DeleteObject(fe->bitmap);
 780
 781     hdc = GetDC(fe->hwnd);
 782     fe->bitmap = CreateCompatibleBitmap(hdc, x, y);
 783     ReleaseDC(fe->hwnd, hdc);
 784
 785     midend_redraw(fe->me);
 786 }
 787
 788 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
 789                                 WPARAM wParam, LPARAM lParam)
 790 {
 791     frontend *fe = (frontend *)GetWindowLong(hwnd, GWL_USERDATA);
 792
 793     switch (message) {
 794       case WM_CLOSE:
 795         DestroyWindow(hwnd);
 796         return 0;
 797       case WM_COMMAND:
 798         switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
 799           case IDM_NEW:
 800             if (!midend_process_key(fe->me, 0, 0, 'n'))
 801                 PostQuitMessage(0);
 802             break;
 803           case IDM_RESTART:
 804             if (!midend_process_key(fe->me, 0, 0, 'r'))
 805                 PostQuitMessage(0);
 806             break;
 807           case IDM_UNDO:
 808             if (!midend_process_key(fe->me, 0, 0, 'u'))
 809                 PostQuitMessage(0);
 810             break;
 811           case IDM_REDO:
 812             if (!midend_process_key(fe->me, 0, 0, '\x12'))
 813                 PostQuitMessage(0);
 814             break;
 815           case IDM_QUIT:
 816             if (!midend_process_key(fe->me, 0, 0, 'q'))
 817                 PostQuitMessage(0);
 818             break;
 819           case IDM_CONFIG:
 820             if (get_config(fe, CFG_SETTINGS))
 821                 new_game_type(fe);
 822             break;
 823           case IDM_SEED:
 824             if (get_config(fe, CFG_SEED))
 825                 new_game_type(fe);
 826             break;
 827           default:
 828             {
 829                 int p = ((wParam &~ 0xF) - IDM_PRESETS) / 0x10;
 830
 831                 if (p >= 0 && p < fe->npresets) {
 832                     midend_set_params(fe->me, fe->presets[p]);
 833                     new_game_type(fe);
 834                 }
 835             }
 836             break;
 837         }
 838         break;
 839       case WM_DESTROY:
 840         PostQuitMessage(0);
 841         return 0;
 842       case WM_PAINT:
 843         {
 844             PAINTSTRUCT p;
 845             HDC hdc, hdc2;
 846             HBITMAP prevbm;
 847
 848             hdc = BeginPaint(hwnd, &p);
 849             hdc2 = CreateCompatibleDC(hdc);
 850             prevbm = SelectObject(hdc2, fe->bitmap);
 851             BitBlt(hdc,
 852                    p.rcPaint.left, p.rcPaint.top,
 853                    p.rcPaint.right - p.rcPaint.left,
 854                    p.rcPaint.bottom - p.rcPaint.top,
 855                    hdc2,
 856                    p.rcPaint.left, p.rcPaint.top,
 857                    SRCCOPY);
 858             SelectObject(hdc2, prevbm);
 859             DeleteDC(hdc2);
 860             EndPaint(hwnd, &p);
 861         }
 862         return 0;
 863       case WM_KEYDOWN:
 864         {
 865             int key = -1;
 866
 867             switch (wParam) {
 868               case VK_LEFT: key = CURSOR_LEFT; break;
 869               case VK_RIGHT: key = CURSOR_RIGHT; break;
 870               case VK_UP: key = CURSOR_UP; break;
 871               case VK_DOWN: key = CURSOR_DOWN; break;
 872                 /*
 873                  * Diagonal keys on the numeric keypad.
 874                  */
 875               case VK_PRIOR:
 876                 if (!(lParam & 0x01000000)) key = CURSOR_UP_RIGHT;
 877                 break;
 878               case VK_NEXT:
 879                 if (!(lParam & 0x01000000)) key = CURSOR_DOWN_RIGHT;
 880                 break;
 881               case VK_HOME:
 882                 if (!(lParam & 0x01000000)) key = CURSOR_UP_LEFT;
 883                 break;
 884               case VK_END:
 885                 if (!(lParam & 0x01000000)) key = CURSOR_DOWN_LEFT;
 886                 break;
 887                 /*
 888                  * Numeric keypad keys with Num Lock on.
 889                  */
 890               case VK_NUMPAD4: key = CURSOR_LEFT; break;
 891               case VK_NUMPAD6: key = CURSOR_RIGHT; break;
 892               case VK_NUMPAD8: key = CURSOR_UP; break;
 893               case VK_NUMPAD2: key = CURSOR_DOWN; break;
 894               case VK_NUMPAD9: key = CURSOR_UP_RIGHT; break;
 895               case VK_NUMPAD3: key = CURSOR_DOWN_RIGHT; break;
 896               case VK_NUMPAD7: key = CURSOR_UP_LEFT; break;
 897               case VK_NUMPAD1: key = CURSOR_DOWN_LEFT; break;
 898             }
 899
 900             if (key != -1) {
 901                 if (!midend_process_key(fe->me, 0, 0, key))
 902                     PostQuitMessage(0);
 903             } else {
 904                 MSG m;
 905                 m.hwnd = hwnd;
 906                 m.message = WM_KEYDOWN;
 907                 m.wParam = wParam;
 908                 m.lParam = lParam & 0xdfff;
 909                 TranslateMessage(&m);
 910             }
 911         }
 912         break;
 913       case WM_LBUTTONDOWN:
 914       case WM_RBUTTONDOWN:
 915       case WM_MBUTTONDOWN:
 916         {
 917             int button;
 918
 919             /*
 920              * Shift-clicks count as middle-clicks, since otherwise
 921              * two-button Windows users won't have any kind of
 922              * middle click to use.
 923              */
 924             if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
 925                 button = MIDDLE_BUTTON;
 926             else if (message == WM_LBUTTONDOWN)
 927                 button = LEFT_BUTTON;
 928             else
 929                 button = RIGHT_BUTTON;
 930
 931             if (!midend_process_key(fe->me, LOWORD(lParam),
 932                                     HIWORD(lParam), button))
 933                 PostQuitMessage(0);
 934         }
 935         break;
 936       case WM_CHAR:
 937         if (!midend_process_key(fe->me, 0, 0, (unsigned char)wParam))
 938             PostQuitMessage(0);
 939         return 0;
 940       case WM_TIMER:
 941         if (fe->timer)
 942             midend_timer(fe->me, (float)0.02);
 943         return 0;
 944     }
 945
 946     return DefWindowProc(hwnd, message, wParam, lParam);
 947 }
 948
 949 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
 950 {
 951     MSG msg;
 952
 953     srand(time(NULL));
 954
 955     InitCommonControls();
 956
 957     if (!prev) {
 958         WNDCLASS wndclass;
 959
 960         wndclass.style = 0;
 961         wndclass.lpfnWndProc = WndProc;
 962         wndclass.cbClsExtra = 0;
 963         wndclass.cbWndExtra = 0;
 964         wndclass.hInstance = inst;
 965         wndclass.hIcon = LoadIcon(inst, IDI_APPLICATION);
 966         wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
 967         wndclass.hbrBackground = NULL;
 968         wndclass.lpszMenuName = NULL;
 969         wndclass.lpszClassName = game_name;
 970
 971         RegisterClass(&wndclass);
 972     }
 973
 974     new_window(inst);
 975
 976     while (GetMessage(&msg, NULL, 0, 0)) {
 977         DispatchMessage(&msg);
 978     }
 979
 980     return msg.wParam;
 981 }