windows/mdi.c

   1 /* MDI.C
   2  *
   3  * Copyright 1994, Bob Amstadt
   4  *           1995,1996 Alex Korobka
   5  *
   6  * This file contains routines to support MDI (Multiple Document
   7  * Interface) features .
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * Notes: Fairly complete implementation.
  24  *        Also, Excel and WinWord do _not_ use MDI so if you're trying
  25  *        to fix them look elsewhere.
  26  *
  27  * Notes on how the "More Windows..." is implemented:
  28  *
  29  *      When we have more than 9 opened windows, a "More Windows..."
  30  *      option appears in the "Windows" menu. Each child window has
  31  *      a WND* associated with it, accesible via the children list of
  32  *      the parent window. This WND* has a wIDmenu member, which reflects
  33  *      the position of the child in the window list. For example, with
  34  *      9 child windows, we could have the following pattern:
  35  *
  36  *
  37  *
  38  *                Name of the child window    pWndChild->wIDmenu
  39  *                     Doc1                       5000
  40  *                     Doc2                       5001
  41  *                     Doc3                       5002
  42  *                     Doc4                       5003
  43  *                     Doc5                       5004
  44  *                     Doc6                       5005
  45  *                     Doc7                       5006
  46  *                     Doc8                       5007
  47  *                     Doc9                       5008
  48  *
  49  *
  50  *       The "Windows" menu, as the "More windows..." dialog, are constructed
  51  *       in this order. If we add a child, we would have the following list:
  52  *
  53  *
  54  *               Name of the child window    pWndChild->wIDmenu
  55  *                     Doc1                       5000
  56  *                     Doc2                       5001
  57  *                     Doc3                       5002
  58  *                     Doc4                       5003
  59  *                     Doc5                       5004
  60  *                     Doc6                       5005
  61  *                     Doc7                       5006
  62  *                     Doc8                       5007
  63  *                     Doc9                       5008
  64  *                     Doc10                      5009
  65  *
  66  *       But only 5000 to 5008 would be displayed in the "Windows" menu. We want
  67  *       the last created child to be in the menu, so we swap the last child with
  68  *       the 9th... Doc9 will be accessible via the "More Windows..." option.
  69  *
  70  *                     Doc1                       5000
  71  *                     Doc2                       5001
  72  *                     Doc3                       5002
  73  *                     Doc4                       5003
  74  *                     Doc5                       5004
  75  *                     Doc6                       5005
  76  *                     Doc7                       5006
  77  *                     Doc8                       5007
  78  *                     Doc9                       5009
  79  *                     Doc10                      5008
  80  *
  81  */
  82
  83 #include <stdlib.h>
  84 #include <stdarg.h>
  85 #include <stdio.h>
  86 #include <string.h>
  87 #include <math.h>
  88
  89 #include "windef.h"
  90 #include "winbase.h"
  91 #include "wingdi.h"
  92 #include "winuser.h"
  93 #include "wownt32.h"
  94 #include "wine/winuser16.h"
  95 #include "wine/unicode.h"
  96 #include "win.h"
  97 #include "nonclient.h"
  98 #include "controls.h"
  99 #include "message.h"
 100 #include "user.h"
 101 #include "wine/debug.h"
 102 #include "dlgs.h"
 103
 104 WINE_DEFAULT_DEBUG_CHANNEL(mdi);
 105
 106 #define MDI_MAXTITLELENGTH      0xa1
 107
 108 #define WM_MDICALCCHILDSCROLL   0x10ac /* this is exactly what Windows uses */
 109
 110 /* "More Windows..." definitions */
 111 #define MDI_MOREWINDOWSLIMIT    9       /* after this number of windows, a "More Windows..."
 112                                            option will appear under the Windows menu */
 113 #define MDI_IDC_LISTBOX         100
 114 #define IDS_MDI_MOREWINDOWS     13
 115
 116 #define MDIF_NEEDUPDATE         0x0001
 117
 118 typedef struct
 119 {
 120     UINT      nActiveChildren;
 121     HWND      hwndActiveChild;
 122     HWND      *child; /* array of tracked children */
 123     HMENU     hFrameMenu;
 124     HMENU     hWindowMenu;
 125     UINT      idFirstChild;
 126     LPWSTR    frameTitle;
 127     UINT      nTotalCreated;
 128     UINT      mdiFlags;
 129     UINT      sbRecalc;   /* SB_xxx flags for scrollbar fixup */
 130 } MDICLIENTINFO;
 131
 132 static HBITMAP hBmpClose   = 0;
 133
 134 /* ----------------- declarations ----------------- */
 135 static void MDI_UpdateFrameText( HWND, HWND, LPCWSTR);
 136 static BOOL MDI_AugmentFrameMenu( HWND, HWND );
 137 static BOOL MDI_RestoreFrameMenu( HWND, HWND );
 138 static LONG MDI_ChildActivate( HWND, HWND );
 139 static LRESULT MDI_RefreshMenu(MDICLIENTINFO *);
 140
 141 static HWND MDI_MoreWindowsDialog(HWND);
 142 static LRESULT WINAPI MDIClientWndProcA( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
 143 static LRESULT WINAPI MDIClientWndProcW( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );
 144
 145 /* -------- Miscellaneous service functions ----------
 146  *
 147  *                      MDI_GetChildByID
 148  */
 149 static HWND MDI_GetChildByID(HWND hwnd, UINT id, MDICLIENTINFO *ci)
 150 {
 151     int i;
 152
 153     for (i = 0; ci->nActiveChildren; i++)
 154     {
 155         if (GetWindowLongPtrW( ci->child[i], GWLP_ID ) == id)
 156             return ci->child[i];
 157     }
 158     return 0;
 159 }
 160
 161 static void MDI_PostUpdate(HWND hwnd, MDICLIENTINFO* ci, WORD recalc)
 162 {
 163     if( !(ci->mdiFlags & MDIF_NEEDUPDATE) )
 164     {
 165         ci->mdiFlags |= MDIF_NEEDUPDATE;
 166         PostMessageA( hwnd, WM_MDICALCCHILDSCROLL, 0, 0);
 167     }
 168     ci->sbRecalc = recalc;
 169 }
 170
 171
 172 /*********************************************************************
 173  * MDIClient class descriptor
 174  */
 175 const struct builtin_class_descr MDICLIENT_builtin_class =
 176 {
 177     "MDIClient",            /* name */
 178     0,                      /* style */
 179     MDIClientWndProcA,      /* procA */
 180     MDIClientWndProcW,      /* procW */
 181     sizeof(MDICLIENTINFO),  /* extra */
 182     IDC_ARROW,              /* cursor */
 183     (HBRUSH)(COLOR_APPWORKSPACE+1)    /* brush */
 184 };
 185
 186
 187 static MDICLIENTINFO *get_client_info( HWND client )
 188 {
 189     MDICLIENTINFO *ret = NULL;
 190     WND *win = WIN_GetPtr( client );
 191     if (win)
 192     {
 193         if (win == WND_OTHER_PROCESS)
 194         {
 195             ERR( "client %p belongs to other process\n", client );
 196             return NULL;
 197         }
 198         if (win->cbWndExtra < sizeof(MDICLIENTINFO)) WARN( "%p is not an MDI client\n", client );
 199         else ret = (MDICLIENTINFO *)win->wExtra;
 200         WIN_ReleasePtr( win );
 201     }
 202     return ret;
 203 }
 204
 205 /**********************************************************************
 206  *                      MDI_GetWindow
 207  *
 208  * returns "activateable" child different from the current or zero
 209  */
 210 static HWND MDI_GetWindow(MDICLIENTINFO *clientInfo, HWND hWnd, BOOL bNext,
 211                             DWORD dwStyleMask )
 212 {
 213     int i;
 214     HWND *list;
 215     HWND last = 0;
 216
 217     dwStyleMask |= WS_DISABLED | WS_VISIBLE;
 218     if( !hWnd ) hWnd = clientInfo->hwndActiveChild;
 219
 220     if (!(list = WIN_ListChildren( GetParent(hWnd) ))) return 0;
 221     i = 0;
 222     /* start from next after hWnd */
 223     while (list[i] && list[i] != hWnd) i++;
 224     if (list[i]) i++;
 225
 226     for ( ; list[i]; i++)
 227     {
 228         if (GetWindow( list[i], GW_OWNER )) continue;
 229         if ((GetWindowLongW( list[i], GWL_STYLE ) & dwStyleMask) != WS_VISIBLE) continue;
 230         last = list[i];
 231         if (bNext) goto found;
 232     }
 233     /* now restart from the beginning */
 234     for (i = 0; list[i] && list[i] != hWnd; i++)
 235     {
 236         if (GetWindow( list[i], GW_OWNER )) continue;
 237         if ((GetWindowLongW( list[i], GWL_STYLE ) & dwStyleMask) != WS_VISIBLE) continue;
 238         last = list[i];
 239         if (bNext) goto found;
 240     }
 241  found:
 242     HeapFree( GetProcessHeap(), 0, list );
 243     return last;
 244 }
 245
 246 /**********************************************************************
 247  *                      MDI_CalcDefaultChildPos
 248  *
 249  *  It seems that the default height is about 2/3 of the client rect
 250  */
 251 void MDI_CalcDefaultChildPos( HWND hwndClient, INT total, LPPOINT lpPos, INT delta )
 252 {
 253     INT  nstagger;
 254     RECT rect;
 255     INT  spacing = GetSystemMetrics(SM_CYCAPTION) +
 256                      GetSystemMetrics(SM_CYFRAME) - 1;
 257
 258     if (total < 0)
 259     {
 260         MDICLIENTINFO *ci = get_client_info(hwndClient);
 261         total = ci ? ci->nTotalCreated : 0;
 262     }
 263
 264     GetClientRect( hwndClient, &rect );
 265     if( rect.bottom - rect.top - delta >= spacing )
 266         rect.bottom -= delta;
 267
 268     nstagger = (rect.bottom - rect.top)/(3 * spacing);
 269     lpPos[1].x = (rect.right - rect.left - nstagger * spacing);
 270     lpPos[1].y = (rect.bottom - rect.top - nstagger * spacing);
 271     lpPos[0].x = lpPos[0].y = spacing * (total%(nstagger+1));
 272 }
 273
 274 /**********************************************************************
 275  *            MDISetMenu
 276  */
 277 static LRESULT MDISetMenu( HWND hwnd, HMENU hmenuFrame,
 278                            HMENU hmenuWindow)
 279 {
 280     MDICLIENTINFO *ci;
 281     HWND hwndFrame = GetParent(hwnd);
 282
 283     TRACE("%p %p %p\n", hwnd, hmenuFrame, hmenuWindow);
 284
 285     if (hmenuFrame && !IsMenu(hmenuFrame))
 286     {
 287         WARN("hmenuFrame is not a menu handle\n");
 288         return 0L;
 289     }
 290
 291     if (hmenuWindow && !IsMenu(hmenuWindow))
 292     {
 293         WARN("hmenuWindow is not a menu handle\n");
 294         return 0L;
 295     }
 296
 297     if (!(ci = get_client_info( hwnd ))) return 0;
 298
 299     if (hmenuFrame)
 300     {
 301         if (hmenuFrame == ci->hFrameMenu) return (LRESULT)hmenuFrame;
 302
 303         if (IsZoomed(ci->hwndActiveChild))
 304             MDI_RestoreFrameMenu( hwndFrame, ci->hwndActiveChild );
 305     }
 306
 307     if( hmenuWindow && hmenuWindow != ci->hWindowMenu )
 308     {
 309         /* delete menu items from ci->hWindowMenu
 310          * and add them to hmenuWindow */
 311         /* Agent newsreader calls this function with  ci->hWindowMenu == NULL */
 312         if( ci->hWindowMenu && ci->nActiveChildren )
 313         {
 314             UINT nActiveChildren_old = ci->nActiveChildren;
 315
 316             /* Remove all items from old Window menu */
 317             ci->nActiveChildren = 0;
 318             MDI_RefreshMenu(ci);
 319
 320             ci->hWindowMenu = hmenuWindow;
 321
 322             /* Add items to the new Window menu */
 323             ci->nActiveChildren = nActiveChildren_old;
 324             MDI_RefreshMenu(ci);
 325         }
 326         else
 327             ci->hWindowMenu = hmenuWindow;
 328     }
 329
 330     if (hmenuFrame)
 331     {
 332         SetMenu(hwndFrame, hmenuFrame);
 333         if( hmenuFrame != ci->hFrameMenu )
 334         {
 335             HMENU oldFrameMenu = ci->hFrameMenu;
 336
 337             ci->hFrameMenu = hmenuFrame;
 338             if (IsZoomed(ci->hwndActiveChild) && (GetWindowLongW(ci->hwndActiveChild, GWL_STYLE) & WS_VISIBLE))
 339                 MDI_AugmentFrameMenu( hwndFrame, ci->hwndActiveChild );
 340
 341             return (LRESULT)oldFrameMenu;
 342         }
 343     }
 344     else
 345     {
 346         /* SetMenu() may already have been called, meaning that this window
 347          * already has its menu. But they may have done a SetMenu() on
 348          * an MDI window, and called MDISetMenu() after the fact, meaning
 349          * that the "if" to this "else" wouldn't catch the need to
 350          * augment the frame menu.
 351          */
 352         if( IsZoomed(ci->hwndActiveChild) )
 353             MDI_AugmentFrameMenu( hwndFrame, ci->hwndActiveChild );
 354     }
 355
 356     return 0;
 357 }
 358
 359 /**********************************************************************
 360  *            MDIRefreshMenu
 361  */
 362 static LRESULT MDI_RefreshMenu(MDICLIENTINFO *ci)
 363 {
 364     UINT i, count, visible, id;
 365     WCHAR buf[MDI_MAXTITLELENGTH];
 366
 367     TRACE("children %u, window menu %p\n", ci->nActiveChildren, ci->hWindowMenu);
 368
 369     if (!ci->hWindowMenu)
 370         return 0;
 371
 372     if (!IsMenu(ci->hWindowMenu))
 373     {
 374         WARN("Window menu handle %p is no more valid\n", ci->hWindowMenu);
 375         return 0;
 376     }
 377
 378     /* Windows finds the last separator in the menu, and if after it
 379      * there is a menu item with MDI magic ID removes all existing
 380      * menu items after it, and then adds visible MDI children.
 381      */
 382     count = GetMenuItemCount(ci->hWindowMenu);
 383     for (i = 0; i < count; i++)
 384     {
 385         MENUITEMINFOW mii;
 386
 387         memset(&mii, 0, sizeof(mii));
 388         mii.cbSize = sizeof(mii);
 389         mii.fMask  = MIIM_TYPE;
 390         if (GetMenuItemInfoW(ci->hWindowMenu, i, TRUE, &mii))
 391         {
 392             if (mii.fType & MF_SEPARATOR)
 393             {
 394                 /* Windows checks only ID of the menu item */
 395                 memset(&mii, 0, sizeof(mii));
 396                 mii.cbSize = sizeof(mii);
 397                 mii.fMask  = MIIM_ID;
 398                 if (GetMenuItemInfoW(ci->hWindowMenu, i + 1, TRUE, &mii))
 399                 {
 400                     if (mii.wID == ci->idFirstChild)
 401                     {
 402                         TRACE("removing %u items including separator\n", count - i);
 403                         while (RemoveMenu(ci->hWindowMenu, i, MF_BYPOSITION))
 404                             /* nothing */;
 405
 406                         break;
 407                     }
 408                 }
 409             }
 410         }
 411     }
 412
 413     visible = 0;
 414     for (i = 0; i < ci->nActiveChildren; i++)
 415     {
 416         if (GetWindowLongW(ci->child[i], GWL_STYLE) & WS_VISIBLE)
 417         {
 418             id = ci->idFirstChild + visible;
 419
 420             if (visible == MDI_MOREWINDOWSLIMIT)
 421             {
 422                 LoadStringW(user32_module, IDS_MDI_MOREWINDOWS, buf, sizeof(buf)/sizeof(WCHAR));
 423                 AppendMenuW(ci->hWindowMenu, MF_STRING, id, buf);
 424                 break;
 425             }
 426
 427             if (!visible)
 428                 /* Visio expects that separator has id 0 */
 429                 AppendMenuW(ci->hWindowMenu, MF_SEPARATOR, 0, NULL);
 430
 431             visible++;
 432
 433             SetWindowLongPtrW(ci->child[i], GWLP_ID, id);
 434
 435             buf[0] = '&';
 436             buf[1] = '0' + visible;
 437             buf[2] = ' ';
 438             InternalGetWindowText(ci->child[i], buf + 3, sizeof(buf)/sizeof(WCHAR) - 3);
 439             TRACE("Adding %p, id %u %s\n", ci->child[i], id, debugstr_w(buf));
 440             AppendMenuW(ci->hWindowMenu, MF_STRING, id, buf);
 441
 442             if (ci->child[i] == ci->hwndActiveChild)
 443                 CheckMenuItem(ci->hWindowMenu, id, MF_CHECKED);
 444         }
 445         else
 446             TRACE("MDI child %p is not visible, skipping\n", ci->child[i]);
 447     }
 448
 449     return (LRESULT)ci->hFrameMenu;
 450 }
 451
 452
 453 /* ------------------ MDI child window functions ---------------------- */
 454
 455 /**********************************************************************
 456  *                      MDI_ChildGetMinMaxInfo
 457  *
 458  * Note: The rule here is that client rect of the maximized MDI child
 459  *       is equal to the client rect of the MDI client window.
 460  */
 461 static void MDI_ChildGetMinMaxInfo( HWND client, HWND hwnd, MINMAXINFO* lpMinMax )
 462 {
 463     RECT rect;
 464
 465     GetClientRect( client, &rect );
 466     AdjustWindowRectEx( &rect, GetWindowLongW( hwnd, GWL_STYLE ),
 467                         0, GetWindowLongW( hwnd, GWL_EXSTYLE ));
 468
 469     lpMinMax->ptMaxSize.x = rect.right -= rect.left;
 470     lpMinMax->ptMaxSize.y = rect.bottom -= rect.top;
 471
 472     lpMinMax->ptMaxPosition.x = rect.left;
 473     lpMinMax->ptMaxPosition.y = rect.top;
 474
 475     TRACE("max rect (%ld,%ld - %ld, %ld)\n",
 476                         rect.left,rect.top,rect.right,rect.bottom);
 477 }
 478
 479 /**********************************************************************
 480  *                      MDI_SwitchActiveChild
 481  *
 482  * Note: SetWindowPos sends WM_CHILDACTIVATE to the child window that is
 483  *       being activated
 484  */
 485 static void MDI_SwitchActiveChild( MDICLIENTINFO *ci, HWND hwndTo )
 486 {
 487     HWND hwndPrev;
 488
 489     hwndPrev = ci->hwndActiveChild;
 490
 491     TRACE("from %p, to %p\n", hwndPrev, hwndTo);
 492
 493     if ( hwndTo != hwndPrev )
 494     {
 495         BOOL was_zoomed = IsZoomed(hwndPrev);
 496
 497         if (was_zoomed)
 498         {
 499             /* restore old MDI child */
 500             SendMessageW( hwndPrev, WM_SETREDRAW, FALSE, 0 );
 501             ShowWindow( hwndPrev, SW_RESTORE );
 502             SendMessageW( hwndPrev, WM_SETREDRAW, TRUE, 0 );
 503
 504             /* activate new MDI child */
 505             SetWindowPos( hwndTo, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE );
 506             /* maximize new MDI child */
 507             ShowWindow( hwndTo, SW_MAXIMIZE );
 508         }
 509         /* activate new MDI child */
 510         SetWindowPos( hwndTo, HWND_TOP, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE );
 511     }
 512 }
 513
 514
 515 /**********************************************************************
 516  *                                      MDIDestroyChild
 517  */
 518 static LRESULT MDIDestroyChild( HWND client, MDICLIENTINFO *ci,
 519                                 HWND child, BOOL flagDestroy )
 520 {
 521     UINT i;
 522
 523     TRACE("# of managed children %u\n", ci->nActiveChildren);
 524
 525     if( child == ci->hwndActiveChild )
 526     {
 527         HWND next = MDI_GetWindow(ci, child, TRUE, 0);
 528         if (next)
 529             MDI_SwitchActiveChild(ci, next);
 530         else
 531         {
 532             ShowWindow(child, SW_HIDE);
 533             if (IsZoomed(child))
 534             {
 535                 MDI_RestoreFrameMenu(GetParent(client), child);
 536                 MDI_UpdateFrameText(GetParent(client), client, NULL);
 537             }
 538             MDI_ChildActivate(client, 0);
 539         }
 540     }
 541
 542     for (i = 0; i < ci->nActiveChildren; i++)
 543     {
 544         if (ci->child[i] == child)
 545         {
 546             HWND *new_child = HeapAlloc(GetProcessHeap(), 0, (ci->nActiveChildren - 1) * sizeof(HWND));
 547             memcpy(new_child, ci->child, i * sizeof(HWND));
 548             if (i + 1 < ci->nActiveChildren)
 549                 memcpy(new_child + i, ci->child + i + 1, (ci->nActiveChildren - i - 1) * sizeof(HWND));
 550             HeapFree(GetProcessHeap(), 0, ci->child);
 551             ci->child = new_child;
 552
 553             ci->nActiveChildren--;
 554             break;
 555         }
 556     }
 557
 558     SendMessageW(client, WM_MDIREFRESHMENU, 0, 0);
 559
 560     if (flagDestroy)
 561     {
 562         MDI_PostUpdate(GetParent(child), ci, SB_BOTH+1);
 563         DestroyWindow(child);
 564     }
 565
 566     TRACE("child destroyed - %p\n", child);
 567     return 0;
 568 }
 569
 570
 571 /**********************************************************************
 572  *                                      MDI_ChildActivate
 573  *
 574  * Called in response to WM_CHILDACTIVATE, or when last MDI child
 575  * is being deactivated.
 576  */
 577 static LONG MDI_ChildActivate( HWND client, HWND child )
 578 {
 579     MDICLIENTINFO *clientInfo;
 580     HWND prevActiveWnd, frame;
 581     BOOL isActiveFrameWnd;
 582
 583     clientInfo = get_client_info( client );
 584
 585     if (clientInfo->hwndActiveChild == child) return 0;
 586
 587     TRACE("%p\n", child);
 588
 589     frame = GetParent(client);
 590     isActiveFrameWnd = (GetActiveWindow() == frame);
 591     prevActiveWnd = clientInfo->hwndActiveChild;
 592
 593     /* deactivate prev. active child */
 594     if(prevActiveWnd)
 595     {
 596         SendMessageW( prevActiveWnd, WM_NCACTIVATE, FALSE, 0L );
 597         SendMessageW( prevActiveWnd, WM_MDIACTIVATE, (WPARAM)prevActiveWnd, (LPARAM)child);
 598     }
 599
 600     clientInfo->hwndActiveChild = child;
 601
 602     MDI_RefreshMenu(clientInfo);
 603
 604     if( isActiveFrameWnd )
 605     {
 606         SendMessageW( child, WM_NCACTIVATE, TRUE, 0L);
 607         SetFocus(child);
 608     }
 609
 610     SendMessageW( child, WM_MDIACTIVATE, (WPARAM)prevActiveWnd, (LPARAM)child );
 611     return TRUE;
 612 }
 613
 614 /* -------------------- MDI client window functions ------------------- */
 615
 616 /**********************************************************************
 617  *                              CreateMDIMenuBitmap
 618  */
 619 static HBITMAP CreateMDIMenuBitmap(void)
 620 {
 621  HDC            hDCSrc  = CreateCompatibleDC(0);
 622  HDC            hDCDest = CreateCompatibleDC(hDCSrc);
 623  HBITMAP        hbClose = LoadBitmapW(0, MAKEINTRESOURCEW(OBM_OLD_CLOSE) );
 624  HBITMAP        hbCopy;
 625  HBITMAP        hobjSrc, hobjDest;
 626
 627  hobjSrc = SelectObject(hDCSrc, hbClose);
 628  hbCopy = CreateCompatibleBitmap(hDCSrc,GetSystemMetrics(SM_CXSIZE),GetSystemMetrics(SM_CYSIZE));
 629  hobjDest = SelectObject(hDCDest, hbCopy);
 630
 631  BitBlt(hDCDest, 0, 0, GetSystemMetrics(SM_CXSIZE), GetSystemMetrics(SM_CYSIZE),
 632           hDCSrc, GetSystemMetrics(SM_CXSIZE), 0, SRCCOPY);
 633
 634  SelectObject(hDCSrc, hobjSrc);
 635  DeleteObject(hbClose);
 636  DeleteDC(hDCSrc);
 637
 638  hobjSrc = SelectObject( hDCDest, GetStockObject(BLACK_PEN) );
 639
 640  MoveToEx( hDCDest, GetSystemMetrics(SM_CXSIZE) - 1, 0, NULL );
 641  LineTo( hDCDest, GetSystemMetrics(SM_CXSIZE) - 1, GetSystemMetrics(SM_CYSIZE) - 1);
 642
 643  SelectObject(hDCDest, hobjSrc );
 644  SelectObject(hDCDest, hobjDest);
 645  DeleteDC(hDCDest);
 646
 647  return hbCopy;
 648 }
 649
 650 /**********************************************************************
 651  *                              MDICascade
 652  */
 653 static LONG MDICascade( HWND client, MDICLIENTINFO *ci )
 654 {
 655     HWND *win_array;
 656     BOOL has_icons = FALSE;
 657     int i, total;
 658
 659     if (IsZoomed(ci->hwndActiveChild))
 660         SendMessageA(client, WM_MDIRESTORE, (WPARAM)ci->hwndActiveChild, 0);
 661
 662     if (ci->nActiveChildren == 0) return 0;
 663
 664     if (!(win_array = WIN_ListChildren( client ))) return 0;
 665
 666     /* remove all the windows we don't want */
 667     for (i = total = 0; win_array[i]; i++)
 668     {
 669         if (!IsWindowVisible( win_array[i] )) continue;
 670         if (GetWindow( win_array[i], GW_OWNER )) continue; /* skip owned windows */
 671         if (IsIconic( win_array[i] ))
 672         {
 673             has_icons = TRUE;
 674             continue;
 675         }
 676         win_array[total++] = win_array[i];
 677     }
 678     win_array[total] = 0;
 679
 680     if (total)
 681     {
 682         INT delta = 0, n = 0, i;
 683         POINT pos[2];
 684         if (has_icons) delta = GetSystemMetrics(SM_CYICONSPACING) + GetSystemMetrics(SM_CYICON);
 685
 686         /* walk the list (backwards) and move windows */
 687         for (i = total - 1; i >= 0; i--)
 688         {
 689             TRACE("move %p to (%ld,%ld) size [%ld,%ld]\n",
 690                   win_array[i], pos[0].x, pos[0].y, pos[1].x, pos[1].y);
 691
 692             MDI_CalcDefaultChildPos(client, n++, pos, delta);
 693             SetWindowPos( win_array[i], 0, pos[0].x, pos[0].y, pos[1].x, pos[1].y,
 694                           SWP_DRAWFRAME | SWP_NOACTIVATE | SWP_NOZORDER);
 695         }
 696     }
 697     HeapFree( GetProcessHeap(), 0, win_array );
 698
 699     if (has_icons) ArrangeIconicWindows( client );
 700     return 0;
 701 }
 702
 703 /**********************************************************************
 704  *                                      MDITile
 705  */
 706 static void MDITile( HWND client, MDICLIENTINFO *ci, WPARAM wParam )
 707 {
 708     HWND *win_array;
 709     int i, total;
 710     BOOL has_icons = FALSE;
 711
 712     if (IsZoomed(ci->hwndActiveChild))
 713         SendMessageA(client, WM_MDIRESTORE, (WPARAM)ci->hwndActiveChild, 0);
 714
 715     if (ci->nActiveChildren == 0) return;
 716
 717     if (!(win_array = WIN_ListChildren( client ))) return;
 718
 719     /* remove all the windows we don't want */
 720     for (i = total = 0; win_array[i]; i++)
 721     {
 722         if (!IsWindowVisible( win_array[i] )) continue;
 723         if (GetWindow( win_array[i], GW_OWNER )) continue; /* skip owned windows (icon titles) */
 724         if (IsIconic( win_array[i] ))
 725         {
 726             has_icons = TRUE;
 727             continue;
 728         }
 729         if ((wParam & MDITILE_SKIPDISABLED) && !IsWindowEnabled( win_array[i] )) continue;
 730         win_array[total++] = win_array[i];
 731     }
 732     win_array[total] = 0;
 733
 734     TRACE("%u windows to tile\n", total);
 735
 736     if (total)
 737     {
 738         HWND *pWnd = win_array;
 739         RECT rect;
 740         int x, y, xsize, ysize;
 741         int rows, columns, r, c, i;
 742
 743         GetClientRect(client,&rect);
 744         rows    = (int) sqrt((double)total);
 745         columns = total / rows;
 746
 747         if( wParam & MDITILE_HORIZONTAL )  /* version >= 3.1 */
 748         {
 749             i = rows;
 750             rows = columns;  /* exchange r and c */
 751             columns = i;
 752         }
 753
 754         if (has_icons)
 755         {
 756             y = rect.bottom - 2 * GetSystemMetrics(SM_CYICONSPACING) - GetSystemMetrics(SM_CYICON);
 757             rect.bottom = ( y - GetSystemMetrics(SM_CYICON) < rect.top )? rect.bottom: y;
 758         }
 759
 760         ysize   = rect.bottom / rows;
 761         xsize   = rect.right  / columns;
 762
 763         for (x = i = 0, c = 1; c <= columns && *pWnd; c++)
 764         {
 765             if (c == columns)
 766             {
 767                 rows  = total - i;
 768                 ysize = rect.bottom / rows;
 769             }
 770
 771             y = 0;
 772             for (r = 1; r <= rows && *pWnd; r++, i++)
 773             {
 774                 SetWindowPos(*pWnd, 0, x, y, xsize, ysize,
 775                              SWP_DRAWFRAME | SWP_NOACTIVATE | SWP_NOZORDER);
 776                 y += ysize;
 777                 pWnd++;
 778             }
 779             x += xsize;
 780         }
 781     }
 782     HeapFree( GetProcessHeap(), 0, win_array );
 783     if (has_icons) ArrangeIconicWindows( client );
 784 }
 785
 786 /* ----------------------- Frame window ---------------------------- */
 787
 788
 789 /**********************************************************************
 790  *                                      MDI_AugmentFrameMenu
 791  */
 792 static BOOL MDI_AugmentFrameMenu( HWND frame, HWND hChild )
 793 {
 794     HMENU menu = GetMenu( frame );
 795     HMENU       hSysPopup = 0;
 796     HBITMAP hSysMenuBitmap = 0;
 797     INT nItems;
 798     UINT iId;
 799     HICON hIcon;
 800
 801     TRACE("frame %p,child %p\n",frame,hChild);
 802
 803     if( !menu ) return 0;
 804
 805     /* if the system buttons already exist do not add them again */
 806     nItems = GetMenuItemCount(menu) - 1;
 807     iId = GetMenuItemID(menu,nItems) ;
 808     if (iId == SC_RESTORE || iId == SC_CLOSE)
 809         return 0;
 810
 811     /* create a copy of sysmenu popup and insert it into frame menu bar */
 812     if (!(hSysPopup = GetSystemMenu(hChild, FALSE)))
 813         return 0;
 814
 815     AppendMenuA(menu,MF_HELP | MF_BITMAP,
 816                    SC_MINIMIZE, (LPSTR)(DWORD)HBMMENU_MBAR_MINIMIZE ) ;
 817     AppendMenuA(menu,MF_HELP | MF_BITMAP,
 818                    SC_RESTORE, (LPSTR)(DWORD)HBMMENU_MBAR_RESTORE );
 819
 820     AppendMenuA(menu,MF_HELP | MF_BITMAP,
 821                    SC_CLOSE, (LPSTR)(DWORD)HBMMENU_MBAR_CLOSE );
 822
 823     /* The system menu is replaced by the child icon */
 824     hIcon = (HICON)GetClassLongW(hChild, GCL_HICONSM);
 825     if (!hIcon)
 826         hIcon = (HICON)GetClassLongW(hChild, GCL_HICON);
 827     if (!hIcon)
 828         hIcon = LoadImageW(0, MAKEINTRESOURCEW(IDI_WINLOGO), IMAGE_ICON, 0, 0, LR_DEFAULTCOLOR);
 829     if (hIcon)
 830     {
 831       HDC hMemDC;
 832       HBITMAP hBitmap, hOldBitmap;
 833       HBRUSH hBrush;
 834       HDC hdc = GetDC(hChild);
 835
 836       if (hdc)
 837       {
 838         int cx, cy;
 839         cx = GetSystemMetrics(SM_CXSMICON);
 840         cy = GetSystemMetrics(SM_CYSMICON);
 841         hMemDC = CreateCompatibleDC(hdc);
 842         hBitmap = CreateCompatibleBitmap(hdc, cx, cy);
 843         hOldBitmap = SelectObject(hMemDC, hBitmap);
 844         SetMapMode(hMemDC, MM_TEXT);
 845         hBrush = CreateSolidBrush(GetSysColor(COLOR_MENU));
 846         DrawIconEx(hMemDC, 0, 0, hIcon, cx, cy, 0, hBrush, DI_NORMAL);
 847         SelectObject (hMemDC, hOldBitmap);
 848         DeleteObject(hBrush);
 849         DeleteDC(hMemDC);
 850         ReleaseDC(hChild, hdc);
 851         hSysMenuBitmap = hBitmap;
 852       }
 853     }
 854
 855     if( !InsertMenuA(menu,0,MF_BYPOSITION | MF_BITMAP | MF_POPUP,
 856                      (UINT_PTR)hSysPopup, (LPSTR)hSysMenuBitmap))
 857     {
 858         TRACE("not inserted\n");
 859         DestroyMenu(hSysPopup);
 860         return 0;
 861     }
 862
 863     EnableMenuItem(hSysPopup, SC_SIZE, MF_BYCOMMAND | MF_GRAYED);
 864     EnableMenuItem(hSysPopup, SC_MOVE, MF_BYCOMMAND | MF_GRAYED);
 865     EnableMenuItem(hSysPopup, SC_MAXIMIZE, MF_BYCOMMAND | MF_GRAYED);
 866     SetMenuDefaultItem(hSysPopup, SC_CLOSE, FALSE);
 867
 868     /* redraw menu */
 869     DrawMenuBar(frame);
 870
 871     return 1;
 872 }
 873
 874 /**********************************************************************
 875  *                                      MDI_RestoreFrameMenu
 876  */
 877 static BOOL MDI_RestoreFrameMenu( HWND frame, HWND hChild )
 878 {
 879     MENUITEMINFOW menuInfo;
 880     HMENU menu = GetMenu( frame );
 881     INT nItems = GetMenuItemCount(menu) - 1;
 882     UINT iId = GetMenuItemID(menu,nItems) ;
 883
 884     TRACE("frame %p,child %p,nIt=%d,iId=%d\n",frame,hChild,nItems,iId);
 885
 886     if( !menu ) return 0;
 887
 888     /* if there is no system buttons then nothing to do */
 889     if(!(iId == SC_RESTORE || iId == SC_CLOSE) )
 890         return 0;
 891
 892     /*
 893      * Remove the system menu, If that menu is the icon of the window
 894      * as it is in win95, we have to delete the bitmap.
 895      */
 896     memset(&menuInfo, 0, sizeof(menuInfo));
 897     menuInfo.cbSize = sizeof(menuInfo);
 898     menuInfo.fMask  = MIIM_DATA | MIIM_TYPE;
 899
 900     GetMenuItemInfoW(menu,
 901                      0,
 902                      TRUE,
 903                      &menuInfo);
 904
 905     RemoveMenu(menu,0,MF_BYPOSITION);
 906
 907     if ( (menuInfo.fType & MFT_BITMAP)           &&
 908          (LOWORD(menuInfo.dwTypeData)!=0)        &&
 909          (LOWORD(menuInfo.dwTypeData)!=HBITMAP_16(hBmpClose)) )
 910     {
 911         DeleteObject(HBITMAP_32(LOWORD(menuInfo.dwTypeData)));
 912     }
 913
 914     /* close */
 915     DeleteMenu(menu, SC_CLOSE, MF_BYCOMMAND);
 916     /* restore */
 917     DeleteMenu(menu, SC_RESTORE, MF_BYCOMMAND);
 918     /* minimize */
 919     DeleteMenu(menu, SC_MINIMIZE, MF_BYCOMMAND);
 920
 921     DrawMenuBar(frame);
 922
 923     return 1;
 924 }
 925
 926
 927 /**********************************************************************
 928  *                                      MDI_UpdateFrameText
 929  *
 930  * used when child window is maximized/restored
 931  *
 932  * Note: lpTitle can be NULL
 933  */
 934 static void MDI_UpdateFrameText( HWND frame, HWND hClient, LPCWSTR lpTitle )
 935 {
 936     WCHAR   lpBuffer[MDI_MAXTITLELENGTH+1];
 937     MDICLIENTINFO *ci = get_client_info( hClient );
 938
 939     TRACE("frameText %s\n", debugstr_w(lpTitle));
 940
 941     if (!ci) return;
 942
 943     if (!lpTitle && !ci->frameTitle)  /* first time around, get title from the frame window */
 944     {
 945         GetWindowTextW( frame, lpBuffer, sizeof(lpBuffer)/sizeof(WCHAR) );
 946         lpTitle = lpBuffer;
 947     }
 948
 949     /* store new "default" title if lpTitle is not NULL */
 950     if (lpTitle)
 951     {
 952         if (ci->frameTitle) HeapFree( GetProcessHeap(), 0, ci->frameTitle );
 953         if ((ci->frameTitle = HeapAlloc( GetProcessHeap(), 0, (strlenW(lpTitle)+1)*sizeof(WCHAR))))
 954             strcpyW( ci->frameTitle, lpTitle );
 955     }
 956
 957     if (ci->frameTitle)
 958     {
 959         if (IsZoomed(ci->hwndActiveChild) && IsWindowVisible(ci->hwndActiveChild))
 960         {
 961             /* combine frame title and child title if possible */
 962
 963             static const WCHAR lpBracket[]  = {' ','-',' ','[',0};
 964             static const WCHAR lpBracket2[]  = {']',0};
 965             int i_frame_text_length = strlenW(ci->frameTitle);
 966
 967             lstrcpynW( lpBuffer, ci->frameTitle, MDI_MAXTITLELENGTH);
 968
 969             if( i_frame_text_length + 6 < MDI_MAXTITLELENGTH )
 970             {
 971                 strcatW( lpBuffer, lpBracket );
 972                 if (GetWindowTextW( ci->hwndActiveChild, lpBuffer + i_frame_text_length + 4,
 973                                     MDI_MAXTITLELENGTH - i_frame_text_length - 5 ))
 974                     strcatW( lpBuffer, lpBracket2 );
 975                 else
 976                     lpBuffer[i_frame_text_length] = 0;  /* remove bracket */
 977             }
 978         }
 979         else
 980         {
 981             lstrcpynW(lpBuffer, ci->frameTitle, MDI_MAXTITLELENGTH+1 );
 982         }
 983     }
 984     else
 985         lpBuffer[0] = '\0';
 986
 987     DefWindowProcW( frame, WM_SETTEXT, 0, (LPARAM)lpBuffer );
 988 }
 989
 990
 991 /* ----------------------------- Interface ---------------------------- */
 992
 993
 994 /**********************************************************************
 995  *              MDIClientWndProc_common
 996  */
 997 static LRESULT MDIClientWndProc_common( HWND hwnd, UINT message,
 998                                         WPARAM wParam, LPARAM lParam, BOOL unicode )
 999 {
1000     MDICLIENTINFO *ci;
1001
1002     TRACE("%p %04x (%s) %08x %08lx\n", hwnd, message, SPY_GetMsgName(message, hwnd), wParam, lParam);
1003
1004     if (!(ci = get_client_info( hwnd ))) return 0;
1005
1006     switch (message)
1007     {
1008       case WM_CREATE:
1009       {
1010           /* Since we are using only cs->lpCreateParams, we can safely
1011            * cast to LPCREATESTRUCTA here */
1012           LPCREATESTRUCTA cs = (LPCREATESTRUCTA)lParam;
1013           WND *wndPtr = WIN_GetPtr( hwnd );
1014
1015           wndPtr->flags |= WIN_ISMDICLIENT;
1016
1017         /* Translation layer doesn't know what's in the cs->lpCreateParams
1018          * so we have to keep track of what environment we're in. */
1019
1020         if( wndPtr->flags & WIN_ISWIN32 )
1021         {
1022             LPCLIENTCREATESTRUCT ccs = cs->lpCreateParams;
1023             ci->hWindowMenu     = ccs->hWindowMenu;
1024             ci->idFirstChild    = ccs->idFirstChild;
1025         }
1026         else
1027         {
1028             LPCLIENTCREATESTRUCT16 ccs = MapSL((SEGPTR)cs->lpCreateParams);
1029             ci->hWindowMenu     = HMENU_32(ccs->hWindowMenu);
1030             ci->idFirstChild    = ccs->idFirstChild;
1031         }
1032         WIN_ReleasePtr( wndPtr );
1033
1034         ci->child = NULL;
1035         ci->nActiveChildren     = 0;
1036         ci->nTotalCreated       = 0;
1037         ci->frameTitle          = NULL;
1038         ci->mdiFlags            = 0;
1039         ci->hFrameMenu = GetMenu(cs->hwndParent);
1040
1041         if (!hBmpClose) hBmpClose = CreateMDIMenuBitmap();
1042
1043         TRACE("Client created: hwnd %p, Window menu %p, idFirst = %u\n",
1044               hwnd, ci->hWindowMenu, ci->idFirstChild );
1045         return 0;
1046       }
1047
1048       case WM_DESTROY:
1049       {
1050           if( IsZoomed(ci->hwndActiveChild) )
1051               MDI_RestoreFrameMenu(GetParent(hwnd), ci->hwndActiveChild);
1052
1053           ci->nActiveChildren = 0;
1054           MDI_RefreshMenu(ci);
1055
1056           if (ci->child) HeapFree( GetProcessHeap(), 0, ci->child );
1057           if (ci->frameTitle) HeapFree( GetProcessHeap(), 0, ci->frameTitle );
1058
1059           return 0;
1060       }
1061
1062       case WM_MDIACTIVATE:
1063       {
1064         MDI_SwitchActiveChild( ci, (HWND)wParam );
1065         return 0;
1066       }
1067
1068       case WM_MDICASCADE:
1069         return MDICascade(hwnd, ci);
1070
1071       case WM_MDICREATE:
1072         if (lParam)
1073         {
1074             HWND child;
1075
1076             if (unicode)
1077             {
1078                 MDICREATESTRUCTW *csW = (MDICREATESTRUCTW *)lParam;
1079                 child = CreateWindowExW(WS_EX_MDICHILD, csW->szClass,
1080                                             csW->szTitle, csW->style,
1081                                             csW->x, csW->y, csW->cx, csW->cy,
1082                                             hwnd, 0, csW->hOwner,
1083                                             (LPVOID)csW->lParam);
1084             }
1085             else
1086             {
1087                 MDICREATESTRUCTA *csA = (MDICREATESTRUCTA *)lParam;
1088                 child = CreateWindowExA(WS_EX_MDICHILD, csA->szClass,
1089                                             csA->szTitle, csA->style,
1090                                             csA->x, csA->y, csA->cx, csA->cy,
1091                                             hwnd, 0, csA->hOwner,
1092                                             (LPVOID)csA->lParam);
1093             }
1094
1095             if (IsZoomed(ci->hwndActiveChild))
1096             {
1097                 MDI_AugmentFrameMenu(GetParent(hwnd), child);
1098                 MDI_UpdateFrameText(GetParent(hwnd), hwnd, NULL);
1099             }
1100             return (LRESULT)child;
1101         }
1102         return 0;
1103
1104       case WM_MDIDESTROY:
1105           return MDIDestroyChild( hwnd, ci, WIN_GetFullHandle( (HWND)wParam ), TRUE );
1106
1107       case WM_MDIGETACTIVE:
1108           if (lParam) *(BOOL *)lParam = IsZoomed(ci->hwndActiveChild);
1109           return (LRESULT)ci->hwndActiveChild;
1110
1111       case WM_MDIICONARRANGE:
1112         ci->mdiFlags |= MDIF_NEEDUPDATE;
1113         ArrangeIconicWindows( hwnd );
1114         ci->sbRecalc = SB_BOTH+1;
1115         SendMessageW( hwnd, WM_MDICALCCHILDSCROLL, 0, 0 );
1116         return 0;
1117
1118       case WM_MDIMAXIMIZE:
1119         ShowWindow( (HWND)wParam, SW_MAXIMIZE );
1120         return 0;
1121
1122       case WM_MDINEXT: /* lParam != 0 means previous window */
1123       {
1124         HWND next = MDI_GetWindow( ci, WIN_GetFullHandle( (HWND)wParam ), !lParam, 0 );
1125         MDI_SwitchActiveChild( ci, next );
1126         break;
1127       }
1128
1129       case WM_MDIRESTORE:
1130         SendMessageW( (HWND)wParam, WM_SYSCOMMAND, SC_RESTORE, 0);
1131         return 0;
1132
1133       case WM_MDISETMENU:
1134           return MDISetMenu( hwnd, (HMENU)wParam, (HMENU)lParam );
1135
1136       case WM_MDIREFRESHMENU:
1137           return MDI_RefreshMenu( ci );
1138
1139       case WM_MDITILE:
1140         ci->mdiFlags |= MDIF_NEEDUPDATE;
1141         ShowScrollBar( hwnd, SB_BOTH, FALSE );
1142         MDITile( hwnd, ci, wParam );
1143         ci->mdiFlags &= ~MDIF_NEEDUPDATE;
1144         return 0;
1145
1146       case WM_VSCROLL:
1147       case WM_HSCROLL:
1148         ci->mdiFlags |= MDIF_NEEDUPDATE;
1149         ScrollChildren( hwnd, message, wParam, lParam );
1150         ci->mdiFlags &= ~MDIF_NEEDUPDATE;
1151         return 0;
1152
1153       case WM_SETFOCUS:
1154           if (ci->hwndActiveChild && !IsIconic( ci->hwndActiveChild ))
1155               SetFocus( ci->hwndActiveChild );
1156           return 0;
1157
1158       case WM_NCACTIVATE:
1159         if( ci->hwndActiveChild )
1160             SendMessageW(ci->hwndActiveChild, message, wParam, lParam);
1161         break;
1162
1163       case WM_PARENTNOTIFY:
1164         switch (LOWORD(wParam))
1165         {
1166         case WM_CREATE:
1167             if (GetWindowLongW((HWND)lParam, GWL_EXSTYLE) & WS_EX_MDICHILD)
1168             {
1169                 ci->nTotalCreated++;
1170                 ci->nActiveChildren++;
1171
1172                 if (!ci->child)
1173                     ci->child = HeapAlloc(GetProcessHeap(), 0, sizeof(HWND));
1174                 else
1175                     ci->child = HeapReAlloc(GetProcessHeap(), 0, ci->child, sizeof(HWND) * ci->nActiveChildren);
1176
1177                 TRACE("Adding MDI child %p, # of children %d\n",
1178                       (HWND)lParam, ci->nActiveChildren);
1179
1180                 ci->child[ci->nActiveChildren - 1] = (HWND)lParam;
1181             }
1182             break;
1183
1184         case WM_LBUTTONDOWN:
1185             {
1186             HWND child;
1187             POINT pt;
1188             pt.x = (short)LOWORD(lParam);
1189             pt.y = (short)HIWORD(lParam);
1190             child = ChildWindowFromPoint(hwnd, pt);
1191
1192             TRACE("notification from %p (%li,%li)\n",child,pt.x,pt.y);
1193
1194             if( child && child != hwnd && child != ci->hwndActiveChild )
1195                 SetWindowPos(child, 0,0,0,0,0, SWP_NOSIZE | SWP_NOMOVE );
1196             break;
1197             }
1198         }
1199         return 0;
1200
1201       case WM_SIZE:
1202         if( IsWindow(ci->hwndActiveChild) && IsZoomed(ci->hwndActiveChild) &&
1203             IsWindowVisible(ci->hwndActiveChild) )
1204         {
1205             RECT        rect;
1206
1207             rect.left = 0;
1208             rect.top = 0;
1209             rect.right = LOWORD(lParam);
1210             rect.bottom = HIWORD(lParam);
1211
1212             AdjustWindowRectEx(&rect, GetWindowLongA(ci->hwndActiveChild, GWL_STYLE),
1213                                0, GetWindowLongA(ci->hwndActiveChild, GWL_EXSTYLE) );
1214             MoveWindow(ci->hwndActiveChild, rect.left, rect.top,
1215                          rect.right - rect.left, rect.bottom - rect.top, 1);
1216         }
1217         else
1218             MDI_PostUpdate(hwnd, ci, SB_BOTH+1);
1219
1220         break;
1221
1222       case WM_MDICALCCHILDSCROLL:
1223         if( (ci->mdiFlags & MDIF_NEEDUPDATE) && ci->sbRecalc )
1224         {
1225             CalcChildScroll(hwnd, ci->sbRecalc-1);
1226             ci->sbRecalc = 0;
1227             ci->mdiFlags &= ~MDIF_NEEDUPDATE;
1228         }
1229         return 0;
1230     }
1231     return unicode ? DefWindowProcW( hwnd, message, wParam, lParam ) :
1232                      DefWindowProcA( hwnd, message, wParam, lParam );
1233 }
1234
1235 /***********************************************************************
1236  *              MDIClientWndProcA
1237  */
1238 static LRESULT WINAPI MDIClientWndProcA( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1239 {
1240     if (!IsWindow(hwnd)) return 0;
1241     return MDIClientWndProc_common( hwnd, message, wParam, lParam, FALSE );
1242 }
1243
1244 /***********************************************************************
1245  *              MDIClientWndProcW
1246  */
1247 static LRESULT WINAPI MDIClientWndProcW( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1248 {
1249     if (!IsWindow(hwnd)) return 0;
1250     return MDIClientWndProc_common( hwnd, message, wParam, lParam, TRUE );
1251 }
1252
1253 /***********************************************************************
1254  *              DefFrameProcA (USER32.@)
1255  */
1256 LRESULT WINAPI DefFrameProcA( HWND hwnd, HWND hwndMDIClient,
1257                                 UINT message, WPARAM wParam, LPARAM lParam)
1258 {
1259     if (hwndMDIClient)
1260     {
1261         switch (message)
1262         {
1263         case WM_SETTEXT:
1264             {
1265                 DWORD len = MultiByteToWideChar( CP_ACP, 0, (LPSTR)lParam, -1, NULL, 0 );
1266                 LPWSTR text = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
1267                 MultiByteToWideChar( CP_ACP, 0, (LPSTR)lParam, -1, text, len );
1268                 MDI_UpdateFrameText( hwnd, hwndMDIClient, text );
1269                 HeapFree( GetProcessHeap(), 0, text );
1270             }
1271             return 1; /* success. FIXME: check text length */
1272
1273         case WM_COMMAND:
1274         case WM_NCACTIVATE:
1275         case WM_NEXTMENU:
1276         case WM_SETFOCUS:
1277         case WM_SIZE:
1278             return DefFrameProcW( hwnd, hwndMDIClient, message, wParam, lParam );
1279         }
1280     }
1281     return DefWindowProcA(hwnd, message, wParam, lParam);
1282 }
1283
1284
1285 /***********************************************************************
1286  *              DefFrameProcW (USER32.@)
1287  */
1288 LRESULT WINAPI DefFrameProcW( HWND hwnd, HWND hwndMDIClient,
1289                                 UINT message, WPARAM wParam, LPARAM lParam)
1290 {
1291     MDICLIENTINFO *ci = get_client_info( hwndMDIClient );
1292
1293     TRACE("%p %p %04x (%s) %08x %08lx\n", hwnd, hwndMDIClient, message, SPY_GetMsgName(message, hwnd), wParam, lParam);
1294
1295     if (ci)
1296     {
1297         switch (message)
1298         {
1299         case WM_COMMAND:
1300             {
1301                 WORD id = LOWORD(wParam);
1302                 /* check for possible syscommands for maximized MDI child */
1303                 if (id <  ci->idFirstChild || id >= ci->idFirstChild + ci->nActiveChildren)
1304                 {
1305                     if( (id - 0xf000) & 0xf00f ) break;
1306                     if( !IsZoomed(ci->hwndActiveChild) ) break;
1307                     switch( id )
1308                     {
1309                     case SC_SIZE:
1310                     case SC_MOVE:
1311                     case SC_MINIMIZE:
1312                     case SC_MAXIMIZE:
1313                     case SC_NEXTWINDOW:
1314                     case SC_PREVWINDOW:
1315                     case SC_CLOSE:
1316                     case SC_RESTORE:
1317                         return SendMessageW( ci->hwndActiveChild, WM_SYSCOMMAND,
1318                                              wParam, lParam);
1319                     }
1320                 }
1321                 else
1322                 {
1323                     HWND childHwnd;
1324                     if (id - ci->idFirstChild == MDI_MOREWINDOWSLIMIT)
1325                         /* User chose "More Windows..." */
1326                         childHwnd = MDI_MoreWindowsDialog(hwndMDIClient);
1327                     else
1328                         /* User chose one of the windows listed in the "Windows" menu */
1329                         childHwnd = MDI_GetChildByID(hwndMDIClient, id, ci);
1330
1331                     if( childHwnd )
1332                         SendMessageW( hwndMDIClient, WM_MDIACTIVATE, (WPARAM)childHwnd, 0 );
1333                 }
1334             }
1335             break;
1336
1337         case WM_NCACTIVATE:
1338             SendMessageW(hwndMDIClient, message, wParam, lParam);
1339             break;
1340
1341         case WM_SETTEXT:
1342             MDI_UpdateFrameText( hwnd, hwndMDIClient, (LPWSTR)lParam );
1343             return 1; /* success. FIXME: check text length */
1344
1345         case WM_SETFOCUS:
1346             SetFocus(hwndMDIClient);
1347             break;
1348
1349         case WM_SIZE:
1350             MoveWindow(hwndMDIClient, 0, 0, LOWORD(lParam), HIWORD(lParam), TRUE);
1351             break;
1352
1353         case WM_NEXTMENU:
1354             {
1355                 MDINEXTMENU *next_menu = (MDINEXTMENU *)lParam;
1356
1357                 if (!IsIconic(hwnd) && ci->hwndActiveChild && !IsZoomed(ci->hwndActiveChild))
1358                 {
1359                     /* control menu is between the frame system menu and
1360                      * the first entry of menu bar */
1361                     WND *wndPtr = WIN_GetPtr(hwnd);
1362
1363                     if( (wParam == VK_LEFT && GetMenu(hwnd) == next_menu->hmenuIn) ||
1364                         (wParam == VK_RIGHT && GetSubMenu(wndPtr->hSysMenu, 0) == next_menu->hmenuIn) )
1365                     {
1366                         WIN_ReleasePtr(wndPtr);
1367                         wndPtr = WIN_GetPtr(ci->hwndActiveChild);
1368                         next_menu->hmenuNext = GetSubMenu(wndPtr->hSysMenu, 0);
1369                         next_menu->hwndNext = ci->hwndActiveChild;
1370                     }
1371                     WIN_ReleasePtr(wndPtr);
1372                 }
1373                 return 0;
1374             }
1375         }
1376     }
1377
1378     return DefWindowProcW( hwnd, message, wParam, lParam );
1379 }
1380
1381 /***********************************************************************
1382  *              DefMDIChildProcA (USER32.@)
1383  */
1384 LRESULT WINAPI DefMDIChildProcA( HWND hwnd, UINT message,
1385                                    WPARAM wParam, LPARAM lParam )
1386 {
1387     HWND client = GetParent(hwnd);
1388     MDICLIENTINFO *ci = get_client_info( client );
1389
1390     TRACE("%p %04x (%s) %08x %08lx\n", hwnd, message, SPY_GetMsgName(message, hwnd), wParam, lParam);
1391
1392     hwnd = WIN_GetFullHandle( hwnd );
1393     if (!ci) return DefWindowProcA( hwnd, message, wParam, lParam );
1394
1395     switch (message)
1396     {
1397     case WM_SETTEXT:
1398         DefWindowProcA(hwnd, message, wParam, lParam);
1399         if( ci->hwndActiveChild == hwnd && IsZoomed(ci->hwndActiveChild) )
1400             MDI_UpdateFrameText( GetParent(client), client, NULL );
1401         return 1; /* success. FIXME: check text length */
1402
1403     case WM_GETMINMAXINFO:
1404     case WM_MENUCHAR:
1405     case WM_CLOSE:
1406     case WM_SETFOCUS:
1407     case WM_CHILDACTIVATE:
1408     case WM_SYSCOMMAND:
1409     case WM_SHOWWINDOW:
1410     case WM_SETVISIBLE:
1411     case WM_SIZE:
1412     case WM_NEXTMENU:
1413     case WM_SYSCHAR:
1414     case WM_DESTROY:
1415         return DefMDIChildProcW( hwnd, message, wParam, lParam );
1416     }
1417     return DefWindowProcA(hwnd, message, wParam, lParam);
1418 }
1419
1420
1421 /***********************************************************************
1422  *              DefMDIChildProcW (USER32.@)
1423  */
1424 LRESULT WINAPI DefMDIChildProcW( HWND hwnd, UINT message,
1425                                    WPARAM wParam, LPARAM lParam )
1426 {
1427     HWND client = GetParent(hwnd);
1428     MDICLIENTINFO *ci = get_client_info( client );
1429
1430     TRACE("%p %04x (%s) %08x %08lx\n", hwnd, message, SPY_GetMsgName(message, hwnd), wParam, lParam);
1431
1432     hwnd = WIN_GetFullHandle( hwnd );
1433     if (!ci) return DefWindowProcW( hwnd, message, wParam, lParam );
1434
1435     switch (message)
1436     {
1437     case WM_SETTEXT:
1438         DefWindowProcW(hwnd, message, wParam, lParam);
1439         if( ci->hwndActiveChild == hwnd && IsZoomed(ci->hwndActiveChild) )
1440             MDI_UpdateFrameText( GetParent(client), client, NULL );
1441         return 1; /* success. FIXME: check text length */
1442
1443     case WM_GETMINMAXINFO:
1444         MDI_ChildGetMinMaxInfo( client, hwnd, (MINMAXINFO *)lParam );
1445         return 0;
1446
1447     case WM_MENUCHAR:
1448         return 0x00010000; /* MDI children don't have menu bars */
1449
1450     case WM_CLOSE:
1451         SendMessageW( client, WM_MDIDESTROY, (WPARAM)hwnd, 0 );
1452         return 0;
1453
1454     case WM_CHILDACTIVATE:
1455         MDI_ChildActivate( client, hwnd );
1456         return 0;
1457
1458     case WM_SYSCOMMAND:
1459         switch( wParam )
1460         {
1461         case SC_MOVE:
1462             if( ci->hwndActiveChild == hwnd && IsZoomed(ci->hwndActiveChild))
1463                 return 0;
1464             break;
1465         case SC_RESTORE:
1466         case SC_MINIMIZE:
1467             break;
1468         case SC_MAXIMIZE:
1469             if (ci->hwndActiveChild == hwnd && IsZoomed(ci->hwndActiveChild))
1470                 return SendMessageW( GetParent(client), message, wParam, lParam);
1471             break;
1472         case SC_NEXTWINDOW:
1473             SendMessageW( client, WM_MDINEXT, 0, 0);
1474             return 0;
1475         case SC_PREVWINDOW:
1476             SendMessageW( client, WM_MDINEXT, 0, 1);
1477             return 0;
1478         }
1479         break;
1480
1481     case WM_SHOWWINDOW:
1482     case WM_SETVISIBLE:
1483         if (IsZoomed(ci->hwndActiveChild)) ci->mdiFlags &= ~MDIF_NEEDUPDATE;
1484         else MDI_PostUpdate(client, ci, SB_BOTH+1);
1485         break;
1486
1487     case WM_SIZE:
1488         if( hwnd == ci->hwndActiveChild )
1489         {
1490             if( wParam == SIZE_MAXIMIZED )
1491             {
1492                 TRACE("maximizing child %p\n", hwnd );
1493
1494                 MDI_AugmentFrameMenu( GetParent(client), hwnd );
1495             }
1496             else
1497                 MDI_RestoreFrameMenu( GetParent(client), hwnd );
1498         }
1499
1500         MDI_UpdateFrameText( GetParent(client), client, NULL );
1501         MDI_RefreshMenu(ci);
1502         MDI_PostUpdate(client, ci, SB_BOTH+1);
1503         break;
1504
1505     case WM_NEXTMENU:
1506         {
1507             MDINEXTMENU *next_menu = (MDINEXTMENU *)lParam;
1508             HWND parent = GetParent(client);
1509
1510             if( wParam == VK_LEFT )  /* switch to frame system menu */
1511             {
1512                 WND *wndPtr = WIN_GetPtr( parent );
1513                 next_menu->hmenuNext = GetSubMenu( wndPtr->hSysMenu, 0 );
1514                 WIN_ReleasePtr( wndPtr );
1515             }
1516             if( wParam == VK_RIGHT )  /* to frame menu bar */
1517             {
1518                 next_menu->hmenuNext = GetMenu(parent);
1519             }
1520             next_menu->hwndNext = parent;
1521             return 0;
1522         }
1523
1524     case WM_SYSCHAR:
1525         if (wParam == '-')
1526         {
1527             SendMessageW( hwnd, WM_SYSCOMMAND, (WPARAM)SC_KEYMENU, (DWORD)VK_SPACE);
1528             return 0;
1529         }
1530         break;
1531
1532     case WM_DESTROY:
1533         /* Remove itself from the Window menu */
1534         MDI_RefreshMenu(ci);
1535         break;
1536     }
1537     return DefWindowProcW(hwnd, message, wParam, lParam);
1538 }
1539
1540 /**********************************************************************
1541  *              CreateMDIWindowA (USER32.@) Creates a MDI child
1542  *
1543  * RETURNS
1544  *    Success: Handle to created window
1545  *    Failure: NULL
1546  */
1547 HWND WINAPI CreateMDIWindowA(
1548     LPCSTR lpClassName,    /* [in] Pointer to registered child class name */
1549     LPCSTR lpWindowName,   /* [in] Pointer to window name */
1550     DWORD dwStyle,         /* [in] Window style */
1551     INT X,               /* [in] Horizontal position of window */
1552     INT Y,               /* [in] Vertical position of window */
1553     INT nWidth,          /* [in] Width of window */
1554     INT nHeight,         /* [in] Height of window */
1555     HWND hWndParent,     /* [in] Handle to parent window */
1556     HINSTANCE hInstance, /* [in] Handle to application instance */
1557     LPARAM lParam)         /* [in] Application-defined value */
1558 {
1559     TRACE("(%s,%s,%08lx,%d,%d,%d,%d,%p,%p,%08lx)\n",
1560           debugstr_a(lpClassName),debugstr_a(lpWindowName),dwStyle,X,Y,
1561           nWidth,nHeight,hWndParent,hInstance,lParam);
1562
1563     return CreateWindowExA(WS_EX_MDICHILD, lpClassName, lpWindowName,
1564                            dwStyle, X, Y, nWidth, nHeight, hWndParent,
1565                            0, hInstance, (LPVOID)lParam);
1566 }
1567
1568 /***********************************************************************
1569  *              CreateMDIWindowW (USER32.@) Creates a MDI child
1570  *
1571  * RETURNS
1572  *    Success: Handle to created window
1573  *    Failure: NULL
1574  */
1575 HWND WINAPI CreateMDIWindowW(
1576     LPCWSTR lpClassName,    /* [in] Pointer to registered child class name */
1577     LPCWSTR lpWindowName,   /* [in] Pointer to window name */
1578     DWORD dwStyle,         /* [in] Window style */
1579     INT X,               /* [in] Horizontal position of window */
1580     INT Y,               /* [in] Vertical position of window */
1581     INT nWidth,          /* [in] Width of window */
1582     INT nHeight,         /* [in] Height of window */
1583     HWND hWndParent,     /* [in] Handle to parent window */
1584     HINSTANCE hInstance, /* [in] Handle to application instance */
1585     LPARAM lParam)         /* [in] Application-defined value */
1586 {
1587     TRACE("(%s,%s,%08lx,%d,%d,%d,%d,%p,%p,%08lx)\n",
1588           debugstr_w(lpClassName), debugstr_w(lpWindowName), dwStyle, X, Y,
1589           nWidth, nHeight, hWndParent, hInstance, lParam);
1590
1591     return CreateWindowExW(WS_EX_MDICHILD, lpClassName, lpWindowName,
1592                            dwStyle, X, Y, nWidth, nHeight, hWndParent,
1593                            0, hInstance, (LPVOID)lParam);
1594 }
1595
1596 /**********************************************************************
1597  *              TranslateMDISysAccel (USER32.@)
1598  */
1599 BOOL WINAPI TranslateMDISysAccel( HWND hwndClient, LPMSG msg )
1600 {
1601     if (msg->message == WM_KEYDOWN || msg->message == WM_SYSKEYDOWN)
1602     {
1603         MDICLIENTINFO *ci = get_client_info( hwndClient );
1604         WPARAM wParam = 0;
1605
1606         if (!ci || !IsWindowEnabled(ci->hwndActiveChild)) return 0;
1607
1608         /* translate if the Ctrl key is down and Alt not. */
1609
1610         if( (GetKeyState(VK_CONTROL) & 0x8000) && !(GetKeyState(VK_MENU) & 0x8000))
1611         {
1612             switch( msg->wParam )
1613             {
1614             case VK_F6:
1615             case VK_TAB:
1616                 wParam = ( GetKeyState(VK_SHIFT) & 0x8000 ) ? SC_NEXTWINDOW : SC_PREVWINDOW;
1617                 break;
1618             case VK_F4:
1619             case VK_RBUTTON:
1620                 wParam = SC_CLOSE;
1621                 break;
1622             default:
1623                 return 0;
1624             }
1625             TRACE("wParam = %04x\n", wParam);
1626             SendMessageW(ci->hwndActiveChild, WM_SYSCOMMAND, wParam, (LPARAM)msg->wParam);
1627             return 1;
1628         }
1629     }
1630     return 0; /* failure */
1631 }
1632
1633 /***********************************************************************
1634  *              CalcChildScroll (USER32.@)
1635  */
1636 void WINAPI CalcChildScroll( HWND hwnd, INT scroll )
1637 {
1638     SCROLLINFO info;
1639     RECT childRect, clientRect;
1640     HWND *list;
1641
1642     GetClientRect( hwnd, &clientRect );
1643     SetRectEmpty( &childRect );
1644
1645     if ((list = WIN_ListChildren( hwnd )))
1646     {
1647         int i;
1648         for (i = 0; list[i]; i++)
1649         {
1650             DWORD style = GetWindowLongW( list[i], GWL_STYLE );
1651             if (style & WS_MAXIMIZE)
1652             {
1653                 HeapFree( GetProcessHeap(), 0, list );
1654                 ShowScrollBar( hwnd, SB_BOTH, FALSE );
1655                 return;
1656             }
1657             if (style & WS_VISIBLE)
1658             {
1659                 WND *pWnd = WIN_FindWndPtr( list[i] );
1660                 UnionRect( &childRect, &pWnd->rectWindow, &childRect );
1661                 WIN_ReleaseWndPtr( pWnd );
1662             }
1663         }
1664         HeapFree( GetProcessHeap(), 0, list );
1665     }
1666     UnionRect( &childRect, &clientRect, &childRect );
1667
1668     /* set common info values */
1669     info.cbSize = sizeof(info);
1670     info.fMask = SIF_POS | SIF_RANGE;
1671
1672     /* set the specific */
1673     switch( scroll )
1674     {
1675         case SB_BOTH:
1676         case SB_HORZ:
1677                         info.nMin = childRect.left;
1678                         info.nMax = childRect.right - clientRect.right;
1679                         info.nPos = clientRect.left - childRect.left;
1680                         SetScrollInfo(hwnd, scroll, &info, TRUE);
1681                         if (scroll == SB_HORZ) break;
1682                         /* fall through */
1683         case SB_VERT:
1684                         info.nMin = childRect.top;
1685                         info.nMax = childRect.bottom - clientRect.bottom;
1686                         info.nPos = clientRect.top - childRect.top;
1687                         SetScrollInfo(hwnd, scroll, &info, TRUE);
1688                         break;
1689     }
1690 }
1691
1692
1693 /***********************************************************************
1694  *              ScrollChildren (USER32.@)
1695  */
1696 void WINAPI ScrollChildren(HWND hWnd, UINT uMsg, WPARAM wParam,
1697                              LPARAM lParam)
1698 {
1699     INT newPos = -1;
1700     INT curPos, length, minPos, maxPos, shift;
1701     RECT rect;
1702
1703     GetClientRect( hWnd, &rect );
1704
1705     switch(uMsg)
1706     {
1707     case WM_HSCROLL:
1708         GetScrollRange(hWnd,SB_HORZ,&minPos,&maxPos);
1709         curPos = GetScrollPos(hWnd,SB_HORZ);
1710         length = (rect.right - rect.left) / 2;
1711         shift = GetSystemMetrics(SM_CYHSCROLL);
1712         break;
1713     case WM_VSCROLL:
1714         GetScrollRange(hWnd,SB_VERT,&minPos,&maxPos);
1715         curPos = GetScrollPos(hWnd,SB_VERT);
1716         length = (rect.bottom - rect.top) / 2;
1717         shift = GetSystemMetrics(SM_CXVSCROLL);
1718         break;
1719     default:
1720         return;
1721     }
1722
1723     switch( wParam )
1724     {
1725         case SB_LINEUP:
1726                         newPos = curPos - shift;
1727                         break;
1728         case SB_LINEDOWN:
1729                         newPos = curPos + shift;
1730                         break;
1731         case SB_PAGEUP:
1732                         newPos = curPos - length;
1733                         break;
1734         case SB_PAGEDOWN:
1735                         newPos = curPos + length;
1736                         break;
1737
1738         case SB_THUMBPOSITION:
1739                         newPos = LOWORD(lParam);
1740                         break;
1741
1742         case SB_THUMBTRACK:
1743                         return;
1744
1745         case SB_TOP:
1746                         newPos = minPos;
1747                         break;
1748         case SB_BOTTOM:
1749                         newPos = maxPos;
1750                         break;
1751         case SB_ENDSCROLL:
1752                         CalcChildScroll(hWnd,(uMsg == WM_VSCROLL)?SB_VERT:SB_HORZ);
1753                         return;
1754     }
1755
1756     if( newPos > maxPos )
1757         newPos = maxPos;
1758     else
1759         if( newPos < minPos )
1760             newPos = minPos;
1761
1762     SetScrollPos(hWnd, (uMsg == WM_VSCROLL)?SB_VERT:SB_HORZ , newPos, TRUE);
1763
1764     if( uMsg == WM_VSCROLL )
1765         ScrollWindowEx(hWnd ,0 ,curPos - newPos, NULL, NULL, 0, NULL,
1766                         SW_INVALIDATE | SW_ERASE | SW_SCROLLCHILDREN );
1767     else
1768         ScrollWindowEx(hWnd ,curPos - newPos, 0, NULL, NULL, 0, NULL,
1769                         SW_INVALIDATE | SW_ERASE | SW_SCROLLCHILDREN );
1770 }
1771
1772
1773 /******************************************************************************
1774  *              CascadeWindows (USER32.@) Cascades MDI child windows
1775  *
1776  * RETURNS
1777  *    Success: Number of cascaded windows.
1778  *    Failure: 0
1779  */
1780 WORD WINAPI
1781 CascadeWindows (HWND hwndParent, UINT wFlags, const LPRECT lpRect,
1782                 UINT cKids, const HWND *lpKids)
1783 {
1784     FIXME("(%p,0x%08x,...,%u,...): stub\n", hwndParent, wFlags, cKids);
1785     return 0;
1786 }
1787
1788
1789 /******************************************************************************
1790  *              TileWindows (USER32.@) Tiles MDI child windows
1791  *
1792  * RETURNS
1793  *    Success: Number of tiled windows.
1794  *    Failure: 0
1795  */
1796 WORD WINAPI
1797 TileWindows (HWND hwndParent, UINT wFlags, const LPRECT lpRect,
1798              UINT cKids, const HWND *lpKids)
1799 {
1800     FIXME("(%p,0x%08x,...,%u,...): stub\n", hwndParent, wFlags, cKids);
1801     return 0;
1802 }
1803
1804 /************************************************************************
1805  *              "More Windows..." functionality
1806  */
1807
1808 /*              MDI_MoreWindowsDlgProc
1809  *
1810  *    This function will process the messages sent to the "More Windows..."
1811  *    dialog.
1812  *    Return values:  0    = cancel pressed
1813  *                    HWND = ok pressed or double-click in the list...
1814  *
1815  */
1816
1817 static INT_PTR WINAPI MDI_MoreWindowsDlgProc (HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
1818 {
1819     switch (iMsg)
1820     {
1821        case WM_INITDIALOG:
1822        {
1823            UINT widest       = 0;
1824            UINT length;
1825            UINT i;
1826            MDICLIENTINFO *ci = get_client_info( (HWND)lParam );
1827            HWND hListBox = GetDlgItem(hDlg, MDI_IDC_LISTBOX);
1828
1829            for (i = 0; i < ci->nActiveChildren; i++)
1830            {
1831                WCHAR buffer[MDI_MAXTITLELENGTH];
1832
1833                if (!InternalGetWindowText( ci->child[i], buffer, sizeof(buffer)/sizeof(WCHAR) ))
1834                    continue;
1835                SendMessageW(hListBox, LB_ADDSTRING, 0, (LPARAM)buffer );
1836                SendMessageW(hListBox, LB_SETITEMDATA, i, (LPARAM)ci->child[i] );
1837                length = strlenW(buffer);  /* FIXME: should use GetTextExtentPoint */
1838                if (length > widest)
1839                    widest = length;
1840            }
1841            /* Make sure the horizontal scrollbar scrolls ok */
1842            SendMessageW(hListBox, LB_SETHORIZONTALEXTENT, widest * 6, 0);
1843
1844            /* Set the current selection */
1845            SendMessageW(hListBox, LB_SETCURSEL, MDI_MOREWINDOWSLIMIT, 0);
1846            return TRUE;
1847        }
1848
1849        case WM_COMMAND:
1850            switch (LOWORD(wParam))
1851            {
1852                 default:
1853                     if (HIWORD(wParam) != LBN_DBLCLK) break;
1854                     /* fall through */
1855                 case IDOK:
1856                 {
1857                     /*  windows are sorted by menu ID, so we must return the
1858                      *  window associated to the given id
1859                      */
1860                     HWND hListBox     = GetDlgItem(hDlg, MDI_IDC_LISTBOX);
1861                     UINT index        = SendMessageW(hListBox, LB_GETCURSEL, 0, 0);
1862                     LRESULT res = SendMessageW(hListBox, LB_GETITEMDATA, index, 0);
1863                     EndDialog(hDlg, res);
1864                     return TRUE;
1865                 }
1866                 case IDCANCEL:
1867                     EndDialog(hDlg, 0);
1868                     return TRUE;
1869            }
1870            break;
1871     }
1872     return FALSE;
1873 }
1874
1875 /*
1876  *
1877  *                      MDI_MoreWindowsDialog
1878  *
1879  *     Prompts the user with a listbox containing the opened
1880  *     documents. The user can then choose a windows and click
1881  *     on OK to set the current window to the one selected, or
1882  *     CANCEL to cancel. The function returns a handle to the
1883  *     selected window.
1884  */
1885
1886 static HWND MDI_MoreWindowsDialog(HWND hwnd)
1887 {
1888     LPCVOID template;
1889     HRSRC hRes;
1890     HANDLE hDlgTmpl;
1891
1892     hRes = FindResourceA(user32_module, "MDI_MOREWINDOWS", (LPSTR)RT_DIALOG);
1893
1894     if (hRes == 0)
1895         return 0;
1896
1897     hDlgTmpl = LoadResource(user32_module, hRes );
1898
1899     if (hDlgTmpl == 0)
1900         return 0;
1901
1902     template = LockResource( hDlgTmpl );
1903
1904     if (template == 0)
1905         return 0;
1906
1907     return (HWND) DialogBoxIndirectParamA(user32_module,
1908                                           (LPDLGTEMPLATEA) template,
1909                                           hwnd, MDI_MoreWindowsDlgProc, (LPARAM) hwnd);
1910 }