windows/mdi.c

   1 /* MDI.C
   2  *
   3  * Copyright 1994, Bob Amstadt
   4  *
   5  * This file contains routines to support MDI features.
   6  */
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <math.h>
  10 #include "windows.h"
  11 #include "win.h"
  12 #include "mdi.h"
  13 #include "user.h"
  14 #include "sysmetrics.h"
  15
  16 #define DEBUG_MDI /* */
  17
  18 extern WORD MENU_DrawMenuBar( HDC hDC, LPRECT lprect,
  19                               HWND hwnd, BOOL suppress_draw );  /* menu.c */
  20
  21 /**********************************************************************
  22  *                                      MDIRecreateMenuList
  23  */
  24 void
  25 MDIRecreateMenuList(MDICLIENTINFO *ci)
  26 {
  27     MDICHILDINFO *chi;
  28     char buffer[128];
  29     int id, n, index;
  30
  31 #ifdef DEBUG_MDI
  32     fprintf(stderr, "MDIRecreateMenuList: hWindowMenu %04.4x\n",
  33             ci->hWindowMenu);
  34 #endif
  35
  36     id = ci->idFirstChild;
  37     while (DeleteMenu(ci->hWindowMenu, id, MF_BYCOMMAND))
  38         id++;
  39
  40 #ifdef DEBUG_MDI
  41     fprintf(stderr, "MDIRecreateMenuList: id %04.4x, idFirstChild %04.4x\n",
  42             id, ci->idFirstChild);
  43 #endif
  44
  45     if (!ci->flagMenuAltered)
  46     {
  47         ci->flagMenuAltered = TRUE;
  48         AppendMenu(ci->hWindowMenu, MF_SEPARATOR, 0, NULL);
  49     }
  50
  51     id = ci->idFirstChild;
  52     index = 1;
  53     for (chi = ci->infoActiveChildren; chi != NULL; chi = chi->next)
  54     {
  55         n = sprintf(buffer, "%d ", index++);
  56         GetWindowText(chi->hwnd, buffer + n, sizeof(buffer) - n - 1);
  57
  58 #ifdef DEBUG_MDI
  59         fprintf(stderr, "MDIRecreateMenuList: id %04.4x, '%s'\n",
  60                 id, buffer);
  61 #endif
  62
  63         AppendMenu(ci->hWindowMenu, MF_STRING, id++, buffer);
  64     }
  65 }
  66
  67 /**********************************************************************
  68  *                                      MDICreateChild
  69  */
  70 HWND
  71 MDICreateChild(WND *w, MDICLIENTINFO *ci, HWND parent, LPMDICREATESTRUCT cs)
  72 {
  73     HWND hwnd;
  74
  75     /*
  76      * Create child window
  77      */
  78     cs->style &= (WS_MINIMIZE | WS_MAXIMIZE | WS_HSCROLL | WS_VSCROLL);
  79
  80     hwnd = CreateWindowEx(0, cs->szClass, cs->szTitle,
  81                           WS_CHILD | WS_BORDER | WS_CAPTION | WS_CLIPSIBLINGS |
  82                           WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_SYSMENU |
  83                           WS_THICKFRAME | WS_VISIBLE | cs->style,
  84                           cs->x, cs->y, cs->cx, cs->cy, parent, (HMENU) 0,
  85                           w->hInstance, (LPSTR) cs);
  86
  87     if (hwnd)
  88     {
  89         HANDLE h = USER_HEAP_ALLOC(GMEM_MOVEABLE, sizeof(MDICHILDINFO));
  90         MDICHILDINFO *child_info = USER_HEAP_ADDR(h);
  91         if (!h)
  92         {
  93             DestroyWindow(hwnd);
  94             return 0;
  95         }
  96
  97         ci->nActiveChildren++;
  98
  99         child_info->next = ci->infoActiveChildren;
 100         child_info->prev = NULL;
 101         child_info->hwnd = hwnd;
 102
 103         if (ci->infoActiveChildren)
 104             ci->infoActiveChildren->prev = child_info;
 105
 106         ci->infoActiveChildren = child_info;
 107
 108         SendMessage(parent, WM_CHILDACTIVATE, 0, 0);
 109     }
 110
 111     return hwnd;
 112 }
 113
 114 /**********************************************************************
 115  *                                      MDIDestroyChild
 116  */
 117 HWND
 118 MDIDestroyChild(WND *w_parent, MDICLIENTINFO *ci, HWND parent, HWND child,
 119                  BOOL flagDestroy)
 120 {
 121     MDICHILDINFO  *chi;
 122
 123     chi = ci->infoActiveChildren;
 124     while (chi && chi->hwnd != child)
 125         chi = chi->next;
 126
 127     if (chi)
 128     {
 129         if (chi->prev)
 130             chi->prev->next = chi->next;
 131         if (chi->next)
 132             chi->next->prev = chi->prev;
 133         if (ci->infoActiveChildren == chi)
 134             ci->infoActiveChildren = chi->next;
 135
 136         ci->nActiveChildren--;
 137
 138         if (chi->hwnd == ci->hwndActiveChild)
 139             SendMessage(parent, WM_CHILDACTIVATE, 0, 0);
 140
 141         USER_HEAP_FREE((HANDLE) (LONG) chi);
 142
 143         if (flagDestroy)
 144             DestroyWindow(child);
 145     }
 146
 147     return 0;
 148 }
 149
 150 /**********************************************************************
 151  *                                      MDIBringChildToTop
 152  */
 153 void MDIBringChildToTop(HWND parent, WORD id, WORD by_id, BOOL send_to_bottom)
 154 {
 155     MDICHILDINFO  *chi;
 156     MDICLIENTINFO *ci;
 157     WND           *w;
 158     int            i;
 159
 160     w  = WIN_FindWndPtr(parent);
 161     ci = (MDICLIENTINFO *) w->wExtra;
 162
 163 #ifdef DEBUG_MDI
 164     fprintf(stderr, "MDIBringToTop: id %04.4x, by_id %d\n", id, by_id);
 165 #endif
 166
 167     if (by_id)
 168         id -= ci->idFirstChild;
 169     if (!by_id || id < ci->nActiveChildren)
 170     {
 171         chi = ci->infoActiveChildren;
 172
 173         if (by_id)
 174         {
 175             for (i = 0; i < id; i++)
 176                 chi = chi->next;
 177         }
 178         else
 179         {
 180             while (chi && chi->hwnd != id)
 181                 chi = chi->next;
 182         }
 183
 184         if (!chi)
 185             return;
 186
 187 #ifdef DEBUG_MDI
 188         fprintf(stderr, "MDIBringToTop: child %04.4x\n", chi->hwnd);
 189 #endif
 190         if (chi != ci->infoActiveChildren)
 191         {
 192             if (ci->flagChildMaximized)
 193             {
 194                 RECT rectOldRestore, rect;
 195
 196                 w = WIN_FindWndPtr(chi->hwnd);
 197
 198                 rectOldRestore = ci->rectRestore;
 199                 GetWindowRect(chi->hwnd, &ci->rectRestore);
 200
 201                 rect.top    = (ci->rectMaximize.top -
 202                                (w->rectClient.top - w->rectWindow.top));
 203                 rect.bottom = (ci->rectMaximize.bottom +
 204                                (w->rectWindow.bottom - w->rectClient.bottom));
 205                 rect.left   = (ci->rectMaximize.left -
 206                                (w->rectClient.left - w->rectWindow.left));
 207                 rect.right  = (ci->rectMaximize.right +
 208                                (w->rectWindow.right - w->rectClient.right));
 209                 w->dwStyle |= WS_MAXIMIZE;
 210                 SetWindowPos(chi->hwnd, HWND_TOP, rect.left, rect.top,
 211                              rect.right - rect.left + 1,
 212                              rect.bottom - rect.top + 1, 0);
 213                 SendMessage(chi->hwnd, WM_SIZE, SIZE_MAXIMIZED,
 214                             MAKELONG(w->rectClient.right-w->rectClient.left,
 215                                      w->rectClient.bottom-w->rectClient.top));
 216
 217                 w = WIN_FindWndPtr(ci->hwndActiveChild);
 218                 w->dwStyle &= ~WS_MAXIMIZE;
 219                 SetWindowPos(ci->hwndActiveChild, HWND_BOTTOM,
 220                              rectOldRestore.left, rectOldRestore.top,
 221                              rectOldRestore.right - rectOldRestore.left + 1,
 222                              rectOldRestore.bottom - rectOldRestore.top + 1,
 223                              SWP_NOACTIVATE |
 224                              (send_to_bottom ? 0 : SWP_NOZORDER));
 225             }
 226             else
 227             {
 228                 SetWindowPos(chi->hwnd, HWND_TOP, 0, 0, 0, 0,
 229                              SWP_NOMOVE | SWP_NOSIZE );
 230                 if (send_to_bottom)
 231                 {
 232                     SetWindowPos(ci->hwndActiveChild, HWND_BOTTOM, 0, 0, 0, 0,
 233                                  SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
 234                 }
 235             }
 236
 237             if (chi->next)
 238                 chi->next->prev    = chi->prev;
 239
 240             if (chi->prev)
 241                 chi->prev->next    = chi->next;
 242
 243             chi->prev              = NULL;
 244             chi->next              = ci->infoActiveChildren;
 245             chi->next->prev        = chi;
 246             ci->infoActiveChildren = chi;
 247
 248             SendMessage(parent, WM_CHILDACTIVATE, 0, 0);
 249         }
 250
 251 #ifdef DEBUG_MDI
 252         fprintf(stderr, "MDIBringToTop: pos %04.4x, hwnd %04.4x\n",
 253                 id, chi->hwnd);
 254 #endif
 255     }
 256 }
 257
 258 /**********************************************************************
 259  *                                      MDIMaximizeChild
 260  */
 261 LONG MDIMaximizeChild(HWND parent, HWND child, MDICLIENTINFO *ci)
 262 {
 263     WND *w = WIN_FindWndPtr(child);
 264     RECT rect;
 265
 266     MDIBringChildToTop(parent, child, FALSE, FALSE);
 267     ci->rectRestore = w->rectWindow;
 268
 269     rect.top    = (ci->rectMaximize.top -
 270                    (w->rectClient.top - w->rectWindow.top));
 271     rect.bottom = (ci->rectMaximize.bottom +
 272                    (w->rectWindow.bottom - w->rectClient.bottom));
 273     rect.left   = (ci->rectMaximize.left -
 274                    (w->rectClient.left - w->rectWindow.left));
 275     rect.right  = (ci->rectMaximize.right +
 276                    (w->rectWindow.right - w->rectClient.right));
 277     w->dwStyle |= WS_MAXIMIZE;
 278     SetWindowPos(child, 0, rect.left, rect.top,
 279                  rect.right - rect.left + 1, rect.bottom - rect.top + 1,
 280                  SWP_NOACTIVATE | SWP_NOZORDER);
 281
 282     ci->flagChildMaximized = TRUE;
 283
 284     SendMessage(child, WM_SIZE, SIZE_MAXIMIZED,
 285                 MAKELONG(w->rectClient.right-w->rectClient.left,
 286                          w->rectClient.bottom-w->rectClient.top));
 287     SendMessage(GetParent(parent), WM_NCPAINT, 1, 0);
 288
 289     return 0;
 290 }
 291
 292 /**********************************************************************
 293  *                                      MDIRestoreChild
 294  */
 295 LONG MDIRestoreChild(HWND parent, MDICLIENTINFO *ci)
 296 {
 297     HWND    child;
 298     WND    *w      = WIN_FindWndPtr(child);
 299     LPRECT  lprect = &ci->rectRestore;
 300
 301     printf("restoring mdi child\n");
 302
 303     child = ci->hwndActiveChild;
 304
 305     w->dwStyle &= ~WS_MAXIMIZE;
 306     SetWindowPos(child, 0, lprect->left, lprect->top,
 307                  lprect->right - lprect->left + 1,
 308                  lprect->bottom - lprect->top + 1,
 309                  SWP_NOACTIVATE | SWP_NOZORDER);
 310
 311     ci->flagChildMaximized = FALSE;
 312
 313     ShowWindow(child, SW_RESTORE);              /* display the window */
 314     SendMessage(GetParent(parent), WM_NCPAINT, 1, 0);
 315     MDIBringChildToTop(parent, child, FALSE, FALSE);
 316
 317     return 0;
 318 }
 319
 320 /**********************************************************************
 321  *                                      MDIChildActivated
 322  */
 323 LONG MDIChildActivated(WND *w, MDICLIENTINFO *ci, HWND parent)
 324 {
 325     MDICHILDINFO *chi;
 326     HWND          deact_hwnd;
 327     HWND          act_hwnd;
 328     LONG          lParam;
 329
 330 #ifdef DEBUG_MDI
 331     fprintf(stderr, "MDIChildActivate: top %04.4x\n", w->hwndChild);
 332 #endif
 333
 334     chi = ci->infoActiveChildren;
 335     if (chi)
 336     {
 337         deact_hwnd = ci->hwndActiveChild;
 338         act_hwnd   = chi->hwnd;
 339         lParam     = ((LONG) deact_hwnd << 16) | act_hwnd;
 340
 341 #ifdef DEBUG_MDI
 342         fprintf(stderr, "MDIChildActivate: deact %04.4x, act %04.4x\n",
 343                deact_hwnd, act_hwnd);
 344 #endif
 345
 346         ci->hwndActiveChild = act_hwnd;
 347
 348         if (deact_hwnd != act_hwnd)
 349         {
 350             MDIRecreateMenuList(ci);
 351             SendMessage(deact_hwnd,  WM_NCACTIVATE, FALSE, 0);
 352             SendMessage(deact_hwnd, WM_MDIACTIVATE, FALSE, lParam);
 353         }
 354
 355         SendMessage(act_hwnd,  WM_NCACTIVATE, TRUE, 0);
 356         SendMessage(act_hwnd, WM_MDIACTIVATE, TRUE, lParam);
 357     }
 358
 359     if (chi || ci->nActiveChildren == 0)
 360     {
 361         MDIRecreateMenuList(ci);
 362         SendMessage(GetParent(parent), WM_NCPAINT, 0, 0);
 363     }
 364
 365     return 0;
 366 }
 367
 368 /**********************************************************************
 369  *                                      MDICascade
 370  */
 371 LONG MDICascade(HWND parent, MDICLIENTINFO *ci)
 372 {
 373     MDICHILDINFO *chi;
 374     RECT          rect;
 375     int           spacing, xsize, ysize;
 376     int           x, y;
 377
 378     if (ci->flagChildMaximized)
 379         MDIRestoreChild(parent, ci);
 380
 381     GetClientRect(parent, &rect);
 382     spacing = GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CYFRAME);
 383     ysize   = rect.bottom - 8 * spacing;
 384     xsize   = rect.right  - 8 * spacing;
 385
 386 #ifdef DEBUG_MDI
 387     fprintf(stderr,
 388             "MDICascade: Client wnd at (%d,%d) - (%d,%d), spacing %d\n",
 389             rect.left, rect.top, rect.right, rect.bottom, spacing);
 390     fprintf(stderr, "MDICascade: searching for last child\n");
 391 #endif
 392     for (chi = ci->infoActiveChildren; chi->next != NULL; chi = chi->next)
 393         ;
 394
 395 #ifdef DEBUG_MDI
 396     fprintf(stderr, "MDICascade: last child is %04.4x\n", chi->hwnd);
 397 #endif
 398     x = 0;
 399     y = 0;
 400     for ( ; chi != NULL; chi = chi->prev)
 401     {
 402 #ifdef DEBUG_MDI
 403         fprintf(stderr, "MDICascade: move %04.4x to (%d,%d) size [%d,%d]\n",
 404                 chi->hwnd, x, y, xsize, ysize);
 405 #endif
 406         SetWindowPos(chi->hwnd, 0, x, y, xsize, ysize,
 407                      SWP_DRAWFRAME | SWP_NOACTIVATE | SWP_NOZORDER);
 408
 409         x += spacing;
 410         y += spacing;
 411     }
 412
 413     return 0;
 414 }
 415
 416 /**********************************************************************
 417  *                                      MDITile
 418  */
 419 LONG MDITile(HWND parent, MDICLIENTINFO *ci)
 420 {
 421     MDICHILDINFO *chi;
 422     RECT          rect;
 423     int           xsize, ysize;
 424     int           x, y;
 425     int           rows, columns;
 426     int           r, c;
 427     int           i;
 428
 429     if (ci->flagChildMaximized)
 430         MDIRestoreChild(parent, ci);
 431
 432     GetClientRect(parent, &rect);
 433     rows    = (int) sqrt((double) ci->nActiveChildren);
 434     columns = ci->nActiveChildren / rows;
 435     ysize   = rect.bottom / rows;
 436     xsize   = rect.right  / columns;
 437
 438     chi     = ci->infoActiveChildren;
 439     x       = 0;
 440     i       = 0;
 441     for (c = 1; c <= columns; c++)
 442     {
 443         if (c == columns)
 444         {
 445             rows  = ci->nActiveChildren - i;
 446             ysize = rect.bottom / rows;
 447         }
 448
 449         y = 0;
 450         for (r = 1; r <= rows; r++, i++, chi = chi->next)
 451         {
 452             SetWindowPos(chi->hwnd, 0, x, y, xsize, ysize,
 453                          SWP_DRAWFRAME | SWP_NOACTIVATE | SWP_NOZORDER);
 454
 455             y += ysize;
 456         }
 457
 458         x += xsize;
 459     }
 460
 461
 462     return 0;
 463 }
 464
 465 /**********************************************************************
 466  *                                      MDIHandleLButton
 467  */
 468 BOOL MDIHandleLButton(HWND hwndFrame, HWND hwndClient,
 469                       WORD wParam, LONG lParam)
 470 {
 471     MDICLIENTINFO *ci;
 472     WND           *w;
 473     RECT           rect;
 474     WORD           x;
 475
 476     w  = WIN_FindWndPtr(hwndClient);
 477     ci = (MDICLIENTINFO *) w->wExtra;
 478
 479     if (wParam == HTMENU && ci->flagChildMaximized)
 480     {
 481         x = LOWORD(lParam);
 482
 483         NC_GetInsideRect(hwndFrame, &rect);
 484         if (x < rect.left + SYSMETRICS_CXSIZE)
 485         {
 486             SendMessage(ci->hwndActiveChild, WM_SYSCOMMAND,
 487                         SC_CLOSE, lParam);
 488             return TRUE;
 489         }
 490         else if (x >= rect.right - SYSMETRICS_CXSIZE)
 491         {
 492             SendMessage(ci->hwndActiveChild, WM_SYSCOMMAND,
 493                         SC_RESTORE, lParam);
 494             return TRUE;
 495         }
 496     }
 497
 498     return FALSE;
 499 }
 500
 501 /**********************************************************************
 502  *                                      MDIPaintMaximized
 503  */
 504 LONG MDIPaintMaximized(HWND hwndFrame, HWND hwndClient, WORD message,
 505                        WORD wParam, LONG lParam)
 506 {
 507     static HBITMAP hbitmapClose     = 0;
 508     static HBITMAP hbitmapMaximized = 0;
 509
 510     MDICLIENTINFO *ci;
 511     WND           *w;
 512     LONG           rv;
 513     HDC            hdc, hdcMem;
 514     RECT           rect;
 515     WND           *wndPtr = WIN_FindWndPtr(hwndFrame);
 516
 517     w  = WIN_FindWndPtr(hwndClient);
 518     ci = (MDICLIENTINFO *) w->wExtra;
 519
 520 #ifdef DEBUG_MDI
 521         fprintf(stderr,
 522                 "MDIPaintMaximized: frame %04x,  client %04x"
 523                 ",  max flag %d,  menu %04x\n",
 524                 hwndFrame, hwndClient,
 525                 ci->flagChildMaximized, wndPtr ? wndPtr->wIDmenu : 0);
 526 #endif
 527
 528     if (ci->flagChildMaximized && wndPtr && wndPtr->wIDmenu != 0)
 529     {
 530         rv = NC_DoNCPaint( hwndFrame, (HRGN) 1, wParam, TRUE);
 531
 532         hdc = GetDCEx(hwndFrame, 0, DCX_CACHE | DCX_WINDOW);
 533         if (!hdc)
 534             return rv;
 535
 536         hdcMem = CreateCompatibleDC(hdc);
 537
 538         if (hbitmapClose == 0)
 539         {
 540             hbitmapClose     = LoadBitmap(0, MAKEINTRESOURCE(OBM_OLD_CLOSE));
 541             hbitmapMaximized = LoadBitmap(0, MAKEINTRESOURCE(OBM_RESTORE));
 542         }
 543
 544 #ifdef DEBUG_MDI
 545         fprintf(stderr,
 546                 "MDIPaintMaximized: hdcMem %04x, close bitmap %04x, "
 547                 "maximized bitmap %04x\n",
 548                 hdcMem, hbitmapClose, hbitmapMaximized);
 549 #endif
 550
 551         NC_GetInsideRect(hwndFrame, &rect);
 552         rect.top   += ((wndPtr->dwStyle & WS_CAPTION) ?
 553                        SYSMETRICS_CYSIZE + 1 :  0);
 554         SelectObject(hdcMem, hbitmapClose);
 555         BitBlt(hdc, rect.left, rect.top + 1,
 556                SYSMETRICS_CXSIZE, SYSMETRICS_CYSIZE,
 557                hdcMem, 1, 1, SRCCOPY);
 558
 559         NC_GetInsideRect(hwndFrame, &rect);
 560         rect.top   += ((wndPtr->dwStyle & WS_CAPTION) ?
 561                        SYSMETRICS_CYSIZE + 1 :  0);
 562         rect.left   = rect.right - SYSMETRICS_CXSIZE;
 563         SelectObject(hdcMem, hbitmapMaximized);
 564         BitBlt(hdc, rect.left, rect.top + 1,
 565                SYSMETRICS_CXSIZE, SYSMETRICS_CYSIZE,
 566                hdcMem, 1, 1, SRCCOPY);
 567
 568         NC_GetInsideRect(hwndFrame, &rect);
 569         rect.top   += ((wndPtr->dwStyle & WS_CAPTION) ?
 570                        SYSMETRICS_CYSIZE + 1 :  0);
 571         rect.left  += SYSMETRICS_CXSIZE;
 572         rect.right -= SYSMETRICS_CXSIZE;
 573         rect.bottom = rect.top + SYSMETRICS_CYMENU;
 574
 575         MENU_DrawMenuBar(hdc, &rect, hwndFrame, FALSE);
 576
 577         DeleteDC(hdcMem);
 578         ReleaseDC(hwndFrame, hdc);
 579     }
 580     else
 581         DefWindowProc(hwndFrame, message, wParam, lParam);
 582
 583     return rv;
 584 }
 585
 586 /**********************************************************************
 587  *                                      MDIClientWndProc
 588  *
 589  * This function is the handler for all MDI requests.
 590  */
 591 LONG
 592 MDIClientWndProc(HWND hwnd, WORD message, WORD wParam, LONG lParam)
 593 {
 594     LPCREATESTRUCT       cs;
 595     LPCLIENTCREATESTRUCT ccs;
 596     MDICLIENTINFO       *ci;
 597     WND                 *w;
 598
 599     w  = WIN_FindWndPtr(hwnd);
 600     ci = (MDICLIENTINFO *) w->wExtra;
 601
 602     switch (message)
 603     {
 604       case WM_CHILDACTIVATE:
 605         return MDIChildActivated(w, ci, hwnd);
 606
 607       case WM_CREATE:
 608         cs                      = (LPCREATESTRUCT) lParam;
 609         ccs                     = (LPCLIENTCREATESTRUCT) cs->lpCreateParams;
 610         ci->hWindowMenu         = ccs->hWindowMenu;
 611         ci->idFirstChild        = ccs->idFirstChild;
 612         ci->infoActiveChildren  = NULL;
 613         ci->flagMenuAltered     = FALSE;
 614         ci->flagChildMaximized  = FALSE;
 615         w->dwStyle             |= WS_CLIPCHILDREN;
 616
 617         GetClientRect(w->hwndParent, &ci->rectMaximize);
 618         MoveWindow(hwnd, 0, 0,
 619                    ci->rectMaximize.right, ci->rectMaximize.bottom, 1);
 620
 621         return 0;
 622
 623       case WM_MDIACTIVATE:
 624         MDIBringChildToTop(hwnd, wParam, FALSE, FALSE);
 625         return 0;
 626
 627       case WM_MDICASCADE:
 628         return MDICascade(hwnd, ci);
 629
 630       case WM_MDICREATE:
 631         return MDICreateChild(w, ci, hwnd, (LPMDICREATESTRUCT) lParam);
 632
 633       case WM_MDIDESTROY:
 634         return MDIDestroyChild(w, ci, hwnd, wParam, TRUE);
 635
 636       case WM_MDIGETACTIVE:
 637         return ((LONG) ci->hwndActiveChild |
 638                 ((LONG) ci->flagChildMaximized << 16));
 639
 640       case WM_MDIICONARRANGE:
 641         /* return MDIIconArrange(...) */
 642         break;
 643
 644       case WM_MDIMAXIMIZE:
 645         return MDIMaximizeChild(hwnd, wParam, ci);
 646
 647       case WM_MDINEXT:
 648         MDIBringChildToTop(hwnd, wParam, FALSE, TRUE);
 649         break;
 650
 651       case WM_MDIRESTORE:
 652         return MDIRestoreChild(hwnd, ci);
 653
 654       case WM_MDISETMENU:
 655         /* return MDISetMenu(...) */
 656         break;
 657
 658       case WM_MDITILE:
 659         return MDITile(hwnd, ci);
 660
 661       case WM_NCACTIVATE:
 662         SendMessage(ci->hwndActiveChild, message, wParam, lParam);
 663         break;
 664
 665       case WM_PARENTNOTIFY:
 666         if (wParam == WM_DESTROY)
 667             return MDIDestroyChild(w, ci, hwnd, LOWORD(lParam), FALSE);
 668         else if (wParam == WM_LBUTTONDOWN)
 669             MDIBringChildToTop(hwnd, ci->hwndHitTest, FALSE, FALSE);
 670         break;
 671
 672       case WM_SIZE:
 673         GetClientRect(w->hwndParent, &ci->rectMaximize);
 674         break;
 675
 676     }
 677
 678     return DefWindowProc(hwnd, message, wParam, lParam);
 679 }
 680
 681 /**********************************************************************
 682  *                                      DefFrameProc (USER.445)
 683  *
 684  */
 685 LONG
 686 DefFrameProc(HWND hwnd, HWND hwndMDIClient, WORD message,
 687              WORD wParam, LONG lParam)
 688 {
 689     if (hwndMDIClient)
 690     {
 691         switch (message)
 692         {
 693           case WM_COMMAND:
 694             MDIBringChildToTop(hwndMDIClient, wParam, TRUE, FALSE);
 695             break;
 696
 697           case WM_NCLBUTTONDOWN:
 698             if (MDIHandleLButton(hwnd, hwndMDIClient, wParam, lParam))
 699                 return 0;
 700             break;
 701
 702           case WM_NCACTIVATE:
 703             SendMessage(hwndMDIClient, message, wParam, lParam);
 704             return MDIPaintMaximized(hwnd, hwndMDIClient,
 705                                      message, wParam, lParam);
 706
 707           case WM_NCPAINT:
 708             return MDIPaintMaximized(hwnd, hwndMDIClient,
 709                                      message, wParam, lParam);
 710
 711           case WM_SETFOCUS:
 712             SendMessage(hwndMDIClient, WM_SETFOCUS, wParam, lParam);
 713             break;
 714
 715           case WM_SIZE:
 716             MoveWindow(hwndMDIClient, 0, 0,
 717                        LOWORD(lParam), HIWORD(lParam), TRUE);
 718             break;
 719         }
 720     }
 721
 722     return DefWindowProc(hwnd, message, wParam, lParam);
 723 }
 724
 725 /**********************************************************************
 726  *                                      DefMDIChildProc (USER.447)
 727  *
 728  */
 729 LONG
 730 DefMDIChildProc(HWND hwnd, WORD message, WORD wParam, LONG lParam)
 731 {
 732     MDICLIENTINFO       *ci;
 733     WND                 *w;
 734
 735     w  = WIN_FindWndPtr(GetParent(hwnd));
 736     ci = (MDICLIENTINFO *) w->wExtra;
 737
 738     switch (message)
 739     {
 740       case WM_NCHITTEST:
 741         ci->hwndHitTest = hwnd;
 742         break;
 743
 744       case WM_NCPAINT:
 745         return NC_DoNCPaint(hwnd, (HRGN)1,
 746                             hwnd == ci->hwndActiveChild);
 747
 748       case WM_SYSCOMMAND:
 749         switch (wParam)
 750         {
 751           case SC_MAXIMIZE:
 752             return SendMessage(GetParent(hwnd), WM_MDIMAXIMIZE, hwnd, 0);
 753
 754           case SC_RESTORE:
 755             return SendMessage(GetParent(hwnd), WM_MDIRESTORE, hwnd, 0);
 756         }
 757         break;
 758
 759     }
 760
 761     return DefWindowProc(hwnd, message, wParam, lParam);
 762 }
 763
 764 /**********************************************************************
 765  *                                      TranslateMDISysAccel (USER.451)
 766  *
 767  */
 768 BOOL TranslateMDISysAccel(HWND hwndClient, LPMSG msg)
 769 {
 770     return 0;
 771 }