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