src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/mdi.cpp
   3 // Purpose:     MDI classes for wxMSW
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "mdi.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_MDI && !defined(__WXUNIVERSAL__)
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/setup.h"
  35     #include "wx/frame.h"
  36     #include "wx/menu.h"
  37     #include "wx/app.h"
  38     #include "wx/utils.h"
  39     #include "wx/dialog.h"
  40     #if wxUSE_STATUSBAR
  41         #include "wx/statusbr.h"
  42     #endif
  43     #include "wx/settings.h"
  44     #include "wx/intl.h"
  45     #include "wx/log.h"
  46 #endif
  47
  48 #include "wx/mdi.h"
  49 #include "wx/msw/private.h"
  50
  51 #if wxUSE_STATUSBAR && wxUSE_NATIVE_STATUSBAR
  52     #include "wx/msw/statbr95.h"
  53 #endif
  54
  55 #if wxUSE_TOOLBAR
  56     #include "wx/toolbar.h"
  57 #endif // wxUSE_TOOLBAR
  58
  59 #include <string.h>
  60
  61 // ---------------------------------------------------------------------------
  62 // global variables
  63 // ---------------------------------------------------------------------------
  64
  65 extern wxMenu *wxCurrentPopupMenu;
  66
  67 extern const wxChar *wxMDIFrameClassName;   // from app.cpp
  68 extern const wxChar *wxMDIChildFrameClassName;
  69 extern const wxChar *wxMDIChildFrameClassNameNoRedraw;
  70 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  71 extern void wxRemoveHandleAssociation(wxWindow *win);
  72
  73 static HWND invalidHandle = 0;
  74
  75 // ---------------------------------------------------------------------------
  76 // constants
  77 // ---------------------------------------------------------------------------
  78
  79 static const int IDM_WINDOWTILE  = 4001;
  80 static const int IDM_WINDOWTILEHOR  = 4001;
  81 static const int IDM_WINDOWCASCADE = 4002;
  82 static const int IDM_WINDOWICONS = 4003;
  83 static const int IDM_WINDOWNEXT = 4004;
  84 static const int IDM_WINDOWTILEVERT = 4005;
  85 static const int IDM_WINDOWPREV = 4006;
  86
  87 // This range gives a maximum of 500 MDI children. Should be enough :-)
  88 static const int wxFIRST_MDI_CHILD = 4100;
  89 static const int wxLAST_MDI_CHILD = 4600;
  90
  91 // Status border dimensions
  92 static const int wxTHICK_LINE_BORDER = 3;
  93 static const int wxTHICK_LINE_WIDTH  = 1;
  94
  95 // ---------------------------------------------------------------------------
  96 // private functions
  97 // ---------------------------------------------------------------------------
  98
  99 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
 100 // of the parent of win (which is supposed to be the MDI client window)
 101 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
 102
 103 // insert the window menu (subMenu) into menu just before "Help" submenu or at
 104 // the very end if not found
 105 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 106
 107 // Remove the window menu
 108 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu);
 109
 110 // is this an id of an MDI child?
 111 inline bool IsMdiCommandId(int id)
 112 {
 113     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 114 }
 115
 116 // unpack the parameters of WM_MDIACTIVATE message
 117 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 118                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 119
 120 // return the HMENU of the MDI menu
 121 static inline HMENU GetMDIWindowMenu(wxMDIParentFrame *frame)
 122 {
 123     wxMenu *menu = frame->GetWindowMenu();
 124     return menu ? GetHmenuOf(menu) : 0;
 125 }
 126
 127 // ===========================================================================
 128 // implementation
 129 // ===========================================================================
 130
 131 // ---------------------------------------------------------------------------
 132 // wxWin macros
 133 // ---------------------------------------------------------------------------
 134
 135 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 136 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 137 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 138
 139 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 140     EVT_SIZE(wxMDIParentFrame::OnSize)
 141     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 142 END_EVENT_TABLE()
 143
 144 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 145     EVT_IDLE(wxMDIChildFrame::OnIdle)
 146 END_EVENT_TABLE()
 147
 148 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 149     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 150 END_EVENT_TABLE()
 151
 152 // ===========================================================================
 153 // wxMDIParentFrame: the frame which contains the client window which manages
 154 // the children
 155 // ===========================================================================
 156
 157 wxMDIParentFrame::wxMDIParentFrame()
 158 {
 159     m_clientWindow = NULL;
 160     m_currentChild = NULL;
 161     m_windowMenu = (wxMenu*) NULL;
 162     m_parentFrameActive = true;
 163 }
 164
 165 bool wxMDIParentFrame::Create(wxWindow *parent,
 166                               wxWindowID id,
 167                               const wxString& title,
 168                               const wxPoint& pos,
 169                               const wxSize& size,
 170                               long style,
 171                               const wxString& name)
 172 {
 173   m_clientWindow = NULL;
 174   m_currentChild = NULL;
 175
 176   // this style can be used to prevent a window from having the standard MDI
 177   // "Window" menu
 178   if ( style & wxFRAME_NO_WINDOW_MENU )
 179   {
 180       m_windowMenu = (wxMenu *)NULL;
 181   }
 182   else // normal case: we have the window menu, so construct it
 183   {
 184       m_windowMenu = new wxMenu;
 185
 186       m_windowMenu->Append(IDM_WINDOWCASCADE, _("&Cascade"));
 187       m_windowMenu->Append(IDM_WINDOWTILEHOR, _("Tile &Horizontally"));
 188       m_windowMenu->Append(IDM_WINDOWTILEVERT, _("Tile &Vertically"));
 189       m_windowMenu->AppendSeparator();
 190       m_windowMenu->Append(IDM_WINDOWICONS, _("&Arrange Icons"));
 191       m_windowMenu->Append(IDM_WINDOWNEXT, _("&Next"));
 192       m_windowMenu->Append(IDM_WINDOWPREV, _("&Previous"));
 193   }
 194
 195   m_parentFrameActive = true;
 196
 197   if (!parent)
 198     wxTopLevelWindows.Append(this);
 199
 200   SetName(name);
 201   m_windowStyle = style;
 202
 203   if ( parent )
 204       parent->AddChild(this);
 205
 206   if ( id != wxID_ANY )
 207     m_windowId = id;
 208   else
 209     m_windowId = NewControlId();
 210
 211   WXDWORD exflags;
 212   WXDWORD msflags = MSWGetCreateWindowFlags(&exflags);
 213   msflags &= ~WS_VSCROLL;
 214   msflags &= ~WS_HSCROLL;
 215
 216   if ( !wxWindow::MSWCreate(wxMDIFrameClassName,
 217                             title,
 218                             pos, size,
 219                             msflags,
 220                             exflags) )
 221   {
 222       return false;
 223   }
 224
 225   // unlike (almost?) all other windows, frames are created hidden
 226   m_isShown = false;
 227
 228   return true;
 229 }
 230
 231 wxMDIParentFrame::~wxMDIParentFrame()
 232 {
 233     // see comment in ~wxMDIChildFrame
 234 #if wxUSE_TOOLBAR
 235     m_frameToolBar = NULL;
 236 #endif
 237 #if wxUSE_STATUSBAR
 238     m_frameStatusBar = NULL;
 239 #endif // wxUSE_STATUSBAR
 240
 241     DestroyChildren();
 242
 243     if (m_windowMenu)
 244     {
 245         delete m_windowMenu;
 246         m_windowMenu = (wxMenu*) NULL;
 247     }
 248
 249     // the MDI frame menubar is not automatically deleted by Windows unlike for
 250     // the normal frames
 251     if ( m_hMenu )
 252     {
 253         ::DestroyMenu((HMENU)m_hMenu);
 254         m_hMenu = (WXHMENU)NULL;
 255     }
 256
 257     if ( m_clientWindow )
 258     {
 259         if ( m_clientWindow->MSWGetOldWndProc() )
 260             m_clientWindow->UnsubclassWin();
 261
 262         m_clientWindow->SetHWND(0);
 263         delete m_clientWindow;
 264     }
 265 }
 266
 267 #if wxUSE_MENUS_NATIVE
 268
 269 void wxMDIParentFrame::InternalSetMenuBar()
 270 {
 271     m_parentFrameActive = true;
 272
 273     InsertWindowMenu(GetClientWindow(), m_hMenu, GetMDIWindowMenu(this));
 274 }
 275
 276 #endif // wxUSE_MENUS_NATIVE
 277
 278 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 279 {
 280     if (m_windowMenu)
 281     {
 282         if (GetMenuBar())
 283         {
 284             // Remove old window menu
 285             RemoveWindowMenu(GetClientWindow(), m_hMenu);
 286         }
 287
 288         delete m_windowMenu;
 289         m_windowMenu = (wxMenu*) NULL;
 290     }
 291
 292     if (menu)
 293     {
 294         m_windowMenu = menu;
 295         if (GetMenuBar())
 296         {
 297             InsertWindowMenu(GetClientWindow(), m_hMenu,
 298                              GetHmenuOf(m_windowMenu));
 299         }
 300     }
 301 }
 302
 303 void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
 304 {
 305     wxMDIChildFrame *child = GetActiveChild();
 306     if ( child )
 307     {
 308         wxEvtHandler* source = child->GetEventHandler();
 309         wxMenuBar* bar = child->GetMenuBar();
 310
 311         if (menu)
 312         {
 313             menu->UpdateUI(source);
 314         }
 315         else
 316         {
 317             if ( bar != NULL )
 318             {
 319                 int nCount = bar->GetMenuCount();
 320                 for (int n = 0; n < nCount; n++)
 321                 bar->GetMenu(n)->UpdateUI(source);
 322             }
 323         }
 324     }
 325     else
 326     {
 327         wxFrameBase::DoMenuUpdates(menu);
 328     }
 329 }
 330
 331 void wxMDIParentFrame::OnSize(wxSizeEvent&)
 332 {
 333     if ( GetClientWindow() )
 334     {
 335         int width, height;
 336         GetClientSize(&width, &height);
 337
 338         GetClientWindow()->SetSize(0, 0, width, height);
 339     }
 340 }
 341
 342 // Returns the active MDI child window
 343 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 344 {
 345     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 346                                     WM_MDIGETACTIVE, 0, 0L);
 347     if ( hWnd == 0 )
 348         return NULL;
 349     else
 350         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 351 }
 352
 353 // Create the client window class (don't Create the window, just return a new
 354 // class)
 355 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 356 {
 357     return new wxMDIClientWindow;
 358 }
 359
 360 // Responds to colour changes, and passes event on to children.
 361 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 362 {
 363     if ( m_clientWindow )
 364     {
 365         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 366         m_clientWindow->Refresh();
 367     }
 368
 369     event.Skip();
 370 }
 371
 372 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 373 {
 374     // we don't have any standard icons (any more)
 375     return (WXHICON)0;
 376 }
 377
 378 // ---------------------------------------------------------------------------
 379 // MDI operations
 380 // ---------------------------------------------------------------------------
 381
 382 void wxMDIParentFrame::Cascade()
 383 {
 384     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 385 }
 386
 387 void wxMDIParentFrame::Tile(wxOrientation orient)
 388 {
 389     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 390                   _T("invalid orientation value") );
 391
 392     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 393                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 394                                          : MDITILE_VERTICAL, 0);
 395 }
 396
 397 void wxMDIParentFrame::ArrangeIcons()
 398 {
 399     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 400 }
 401
 402 void wxMDIParentFrame::ActivateNext()
 403 {
 404     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 405 }
 406
 407 void wxMDIParentFrame::ActivatePrevious()
 408 {
 409     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 410 }
 411
 412 // ---------------------------------------------------------------------------
 413 // the MDI parent frame window proc
 414 // ---------------------------------------------------------------------------
 415
 416 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 417                                      WXWPARAM wParam,
 418                                      WXLPARAM lParam)
 419 {
 420     WXLRESULT rc = 0;
 421     bool processed = false;
 422
 423     switch ( message )
 424     {
 425         case WM_ACTIVATE:
 426             {
 427                 WXWORD state, minimized;
 428                 WXHWND hwnd;
 429                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 430
 431                 processed = HandleActivate(state, minimized != 0, hwnd);
 432             }
 433             break;
 434
 435         case WM_COMMAND:
 436             {
 437                 WXWORD id, cmd;
 438                 WXHWND hwnd;
 439                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 440
 441                 (void)HandleCommand(id, cmd, hwnd);
 442
 443                 // even if the frame didn't process it, there is no need to try it
 444                 // once again (i.e. call wxFrame::HandleCommand()) - we just did it,
 445                 // so pretend we processed the message anyhow
 446                 processed = true;
 447             }
 448
 449             // always pass this message DefFrameProc(), otherwise MDI menu
 450             // commands (and sys commands - more surprisingly!) won't work
 451             MSWDefWindowProc(message, wParam, lParam);
 452             break;
 453
 454         case WM_CREATE:
 455             m_clientWindow = OnCreateClient();
 456             // Uses own style for client style
 457             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 458             {
 459                 wxLogMessage(_("Failed to create MDI parent frame."));
 460
 461                 rc = -1;
 462             }
 463
 464             processed = true;
 465             break;
 466
 467         case WM_ERASEBKGND:
 468             processed = true;
 469
 470             // we erase background ourselves
 471             rc = true;
 472             break;
 473
 474         case WM_MENUSELECT:
 475             {
 476                 WXWORD item, flags;
 477                 WXHMENU hmenu;
 478                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 479
 480                 if ( m_parentFrameActive )
 481                 {
 482                     processed = HandleMenuSelect(item, flags, hmenu);
 483                 }
 484                 else if (m_currentChild)
 485                 {
 486                     processed = m_currentChild->
 487                         HandleMenuSelect(item, flags, hmenu);
 488                 }
 489             }
 490             break;
 491
 492         case WM_SIZE:
 493             // as we don't (usually) resize the MDI client to exactly fit the
 494             // client area (we put it below the toolbar, above statusbar &c),
 495             // we should not pass this one to DefFrameProc
 496             break;
 497     }
 498
 499     if ( !processed )
 500         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 501
 502     return rc;
 503 }
 504
 505 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 506 {
 507     bool processed = false;
 508
 509     if ( wxWindow::HandleActivate(state, minimized, activate) )
 510     {
 511         // already processed
 512         processed = true;
 513     }
 514
 515     // If this window is an MDI parent, we must also send an OnActivate message
 516     // to the current child.
 517     if ( (m_currentChild != NULL) &&
 518          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 519     {
 520         wxActivateEvent event(wxEVT_ACTIVATE, true, m_currentChild->GetId());
 521         event.SetEventObject( m_currentChild );
 522         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 523             processed = true;
 524     }
 525
 526     return processed;
 527 }
 528
 529 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 530 {
 531     // In case it's e.g. a toolbar.
 532     if ( hwnd )
 533     {
 534         wxWindow *win = wxFindWinFromHandle(hwnd);
 535         if ( win )
 536             return win->MSWCommand(cmd, id);
 537     }
 538
 539     // is it one of standard MDI commands?
 540     WXWPARAM wParam = 0;
 541     WXLPARAM lParam = 0;
 542     int msg;
 543     switch ( id )
 544     {
 545         case IDM_WINDOWCASCADE:
 546             msg = WM_MDICASCADE;
 547             wParam = MDITILE_SKIPDISABLED;
 548             break;
 549
 550         case IDM_WINDOWTILEHOR:
 551             wParam |= MDITILE_HORIZONTAL;
 552             // fall through
 553
 554         case IDM_WINDOWTILEVERT:
 555             if ( !wParam )
 556                 wParam = MDITILE_VERTICAL;
 557             msg = WM_MDITILE;
 558             wParam |= MDITILE_SKIPDISABLED;
 559             break;
 560
 561         case IDM_WINDOWICONS:
 562             msg = WM_MDIICONARRANGE;
 563             break;
 564
 565         case IDM_WINDOWNEXT:
 566             msg = WM_MDINEXT;
 567             lParam = 0;         // next child
 568             break;
 569
 570         case IDM_WINDOWPREV:
 571             msg = WM_MDINEXT;
 572             lParam = 1;         // previous child
 573             break;
 574
 575         default:
 576             msg = 0;
 577     }
 578
 579     if ( msg )
 580     {
 581         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 582
 583         return true;
 584     }
 585
 586     // FIXME VZ: what does this test do??
 587     if (id >= 0xF000)
 588     {
 589         return false; // Get WndProc to call default proc
 590     }
 591
 592     if ( IsMdiCommandId(id) )
 593     {
 594         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 595         while ( node )
 596         {
 597             wxWindow *child = node->GetData();
 598             if ( child->GetHWND() )
 599             {
 600                 long childId = wxGetWindowId(child->GetHWND());
 601                 if (childId == (long)id)
 602                 {
 603                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 604                                    WM_MDIACTIVATE,
 605                                    (WPARAM)child->GetHWND(), 0);
 606                     return true;
 607                 }
 608             }
 609             node = node->GetNext();
 610         }
 611     }
 612     else if ( m_parentFrameActive )
 613     {
 614         return ProcessCommand(id);
 615     }
 616     else if ( m_currentChild )
 617     {
 618         return m_currentChild->HandleCommand(id, cmd, hwnd);
 619     }
 620     else
 621     {
 622         // this shouldn't happen because it means that our messages are being
 623         // lost (they're not sent to the parent frame nor to the children)
 624         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 625     }
 626
 627     return false;
 628 }
 629
 630 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 631                                         WXWPARAM wParam,
 632                                         WXLPARAM lParam)
 633 {
 634     WXHWND clientWnd;
 635     if ( GetClientWindow() )
 636         clientWnd = GetClientWindow()->GetHWND();
 637     else
 638         clientWnd = 0;
 639
 640     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 641 }
 642
 643 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 644 {
 645     MSG *pMsg = (MSG *)msg;
 646
 647     // first let the current child get it
 648     if ( m_currentChild && m_currentChild->GetHWND() &&
 649          m_currentChild->MSWTranslateMessage(msg) )
 650     {
 651         return true;
 652     }
 653
 654     // then try out accel table (will also check the menu accels)
 655     if ( wxFrame::MSWTranslateMessage(msg) )
 656     {
 657         return true;
 658     }
 659
 660     // finally, check for MDI specific built in accel keys
 661     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 662     {
 663         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 664             return true;
 665     }
 666
 667     return false;
 668 }
 669
 670 // ===========================================================================
 671 // wxMDIChildFrame
 672 // ===========================================================================
 673
 674 void wxMDIChildFrame::Init()
 675 {
 676     m_needsResize = true;
 677     m_needsInitialShow = true;
 678 }
 679
 680 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 681                              wxWindowID id,
 682                              const wxString& title,
 683                              const wxPoint& pos,
 684                              const wxSize& size,
 685                              long style,
 686                              const wxString& name)
 687 {
 688   SetName(name);
 689
 690   if ( id != wxID_ANY )
 691     m_windowId = id;
 692   else
 693     m_windowId = (int)NewControlId();
 694
 695   if ( parent )
 696   {
 697       parent->AddChild(this);
 698   }
 699
 700   int x = pos.x;
 701   int y = pos.y;
 702   int width = size.x;
 703   int height = size.y;
 704
 705   MDICREATESTRUCT mcs;
 706
 707   mcs.szClass = style & wxFULL_REPAINT_ON_RESIZE
 708                     ? wxMDIChildFrameClassName
 709                     : wxMDIChildFrameClassNameNoRedraw;
 710   mcs.szTitle = title;
 711   mcs.hOwner = wxGetInstance();
 712   if (x != wxDefaultCoord)
 713       mcs.x = x;
 714   else
 715       mcs.x = CW_USEDEFAULT;
 716
 717   if (y != wxDefaultCoord)
 718       mcs.y = y;
 719   else
 720       mcs.y = CW_USEDEFAULT;
 721
 722   if (width != wxDefaultCoord)
 723       mcs.cx = width;
 724   else
 725       mcs.cx = CW_USEDEFAULT;
 726
 727   if (height != wxDefaultCoord)
 728       mcs.cy = height;
 729   else
 730       mcs.cy = CW_USEDEFAULT;
 731
 732   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 733   if (style & wxMINIMIZE_BOX)
 734     msflags |= WS_MINIMIZEBOX;
 735   if (style & wxMAXIMIZE_BOX)
 736     msflags |= WS_MAXIMIZEBOX;
 737   if (style & wxTHICK_FRAME)
 738     msflags |= WS_THICKFRAME;
 739   if (style & wxSYSTEM_MENU)
 740     msflags |= WS_SYSMENU;
 741   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 742     msflags |= WS_MINIMIZE;
 743   if (style & wxMAXIMIZE)
 744     msflags |= WS_MAXIMIZE;
 745   if (style & wxCAPTION)
 746     msflags |= WS_CAPTION;
 747
 748   mcs.style = msflags;
 749
 750   mcs.lParam = 0;
 751
 752   wxWindowCreationHook hook(this);
 753
 754   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 755                                  WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 756
 757   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 758
 759   return true;
 760 }
 761
 762 wxMDIChildFrame::~wxMDIChildFrame()
 763 {
 764     // will be destroyed by DestroyChildren() but reset them before calling it
 765     // to avoid using dangling pointers if a callback comes in the meanwhile
 766 #if wxUSE_TOOLBAR
 767     m_frameToolBar = NULL;
 768 #endif
 769 #if wxUSE_STATUSBAR
 770     m_frameStatusBar = NULL;
 771 #endif // wxUSE_STATUSBAR
 772
 773     DestroyChildren();
 774
 775     RemoveWindowMenu(NULL, m_hMenu);
 776
 777     MSWDestroyWindow();
 778 }
 779
 780 bool wxMDIChildFrame::Show(bool show)
 781 {
 782     m_needsInitialShow = false;
 783     return wxFrame::Show(show);
 784 }
 785
 786 // Set the client size (i.e. leave the calculation of borders etc.
 787 // to wxWidgets)
 788 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 789 {
 790   HWND hWnd = GetHwnd();
 791
 792   RECT rect;
 793   ::GetClientRect(hWnd, &rect);
 794
 795   RECT rect2;
 796   GetWindowRect(hWnd, &rect2);
 797
 798   // Find the difference between the entire window (title bar and all)
 799   // and the client area; add this to the new client size to move the
 800   // window
 801   int actual_width = rect2.right - rect2.left - rect.right + width;
 802   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 803
 804 #if wxUSE_STATUSBAR
 805   if (GetStatusBar() && GetStatusBar()->IsShown())
 806   {
 807     int sx, sy;
 808     GetStatusBar()->GetSize(&sx, &sy);
 809     actual_height += sy;
 810   }
 811 #endif // wxUSE_STATUSBAR
 812
 813   POINT point;
 814   point.x = rect2.left;
 815   point.y = rect2.top;
 816
 817   // If there's an MDI parent, must subtract the parent's top left corner
 818   // since MoveWindow moves relative to the parent
 819   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 820   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 821
 822   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 823
 824   wxSize size(width, height);
 825   wxSizeEvent event(size, m_windowId);
 826   event.SetEventObject( this );
 827   GetEventHandler()->ProcessEvent(event);
 828 }
 829
 830 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 831 {
 832   RECT rect;
 833   GetWindowRect(GetHwnd(), &rect);
 834   POINT point;
 835   point.x = rect.left;
 836   point.y = rect.top;
 837
 838   // Since we now have the absolute screen coords,
 839   // if there's a parent we must subtract its top left corner
 840   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 841   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 842
 843   *x = point.x;
 844   *y = point.y;
 845 }
 846
 847 void wxMDIChildFrame::InternalSetMenuBar()
 848 {
 849     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 850
 851     InsertWindowMenu(parent->GetClientWindow(),
 852                      m_hMenu, GetMDIWindowMenu(parent));
 853
 854     parent->m_parentFrameActive = false;
 855 }
 856
 857 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 858 {
 859     // we don't have any standard icons (any more)
 860     return (WXHICON)0;
 861 }
 862
 863 // ---------------------------------------------------------------------------
 864 // MDI operations
 865 // ---------------------------------------------------------------------------
 866
 867 void wxMDIChildFrame::Maximize(bool maximize)
 868 {
 869     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 870     if ( parent && parent->GetClientWindow() )
 871     {
 872         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 873                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 874                       (WPARAM)GetHwnd(), 0);
 875     }
 876 }
 877
 878 void wxMDIChildFrame::Restore()
 879 {
 880     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 881     if ( parent && parent->GetClientWindow() )
 882     {
 883         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 884                       (WPARAM) GetHwnd(), 0);
 885     }
 886 }
 887
 888 void wxMDIChildFrame::Activate()
 889 {
 890     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 891     if ( parent && parent->GetClientWindow() )
 892     {
 893         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 894                       (WPARAM) GetHwnd(), 0);
 895     }
 896 }
 897
 898 // ---------------------------------------------------------------------------
 899 // MDI window proc and message handlers
 900 // ---------------------------------------------------------------------------
 901
 902 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
 903                                     WXWPARAM wParam,
 904                                     WXLPARAM lParam)
 905 {
 906     WXLRESULT rc = 0;
 907     bool processed = false;
 908
 909     switch ( message )
 910     {
 911         case WM_COMMAND:
 912             {
 913                 WORD id, cmd;
 914                 WXHWND hwnd;
 915                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 916                               &id, &hwnd, &cmd);
 917
 918                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 919             }
 920             break;
 921
 922         case WM_GETMINMAXINFO:
 923             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
 924             break;
 925
 926         case WM_MDIACTIVATE:
 927             {
 928                 WXWORD act;
 929                 WXHWND hwndAct, hwndDeact;
 930                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 931
 932                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 933             }
 934             // fall through
 935
 936         case WM_MOVE:
 937             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 938             // scrollbars if necessary
 939
 940             // fall through
 941
 942         case WM_SIZE:
 943             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 944             // things happen
 945             MSWDefWindowProc(message, wParam, lParam);
 946             break;
 947
 948         case WM_SYSCOMMAND:
 949             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 950             // the message (the base class version does not)
 951             return MSWDefWindowProc(message, wParam, lParam);
 952
 953         case WM_WINDOWPOSCHANGING:
 954             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 955             break;
 956     }
 957
 958     if ( !processed )
 959         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 960
 961     return rc;
 962 }
 963
 964 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 965 {
 966     // In case it's e.g. a toolbar.
 967     if ( hwnd )
 968     {
 969         wxWindow *win = wxFindWinFromHandle(hwnd);
 970         if (win)
 971             return win->MSWCommand(cmd, id);
 972     }
 973
 974     if (wxCurrentPopupMenu)
 975     {
 976         wxMenu *popupMenu = wxCurrentPopupMenu;
 977         wxCurrentPopupMenu = NULL;
 978         if (popupMenu->MSWCommand(cmd, id))
 979             return true;
 980     }
 981
 982     bool processed;
 983     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 984     {
 985         processed = ProcessCommand(id);
 986     }
 987     else
 988     {
 989         processed = false;
 990     }
 991
 992     return processed;
 993 }
 994
 995 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 996                                         WXHWND hwndAct,
 997                                         WXHWND hwndDeact)
 998 {
 999     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1000
1001     HMENU menuToSet = 0;
1002
1003     bool activated;
1004
1005     if ( m_hWnd == hwndAct )
1006     {
1007         activated = true;
1008         parent->m_currentChild = this;
1009
1010         HMENU child_menu = (HMENU)GetWinMenu();
1011         if ( child_menu )
1012         {
1013             parent->m_parentFrameActive = false;
1014
1015             menuToSet = child_menu;
1016         }
1017     }
1018     else if ( m_hWnd == hwndDeact )
1019     {
1020         wxASSERT_MSG( parent->m_currentChild == this,
1021                       wxT("can't deactivate MDI child which wasn't active!") );
1022
1023         activated = false;
1024         parent->m_currentChild = NULL;
1025
1026         HMENU parent_menu = (HMENU)parent->GetWinMenu();
1027
1028         // activate the the parent menu only when there is no other child
1029         // that has been activated
1030         if ( parent_menu && !hwndAct )
1031         {
1032             parent->m_parentFrameActive = true;
1033
1034             menuToSet = parent_menu;
1035         }
1036     }
1037     else
1038     {
1039         // we have nothing to do with it
1040         return false;
1041     }
1042
1043     if ( menuToSet )
1044     {
1045         MDISetMenu(parent->GetClientWindow(),
1046                    menuToSet, GetMDIWindowMenu(parent));
1047     }
1048
1049     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1050     event.SetEventObject( this );
1051
1052     ResetWindowStyle((void *)NULL);
1053
1054     return GetEventHandler()->ProcessEvent(event);
1055 }
1056
1057 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1058 {
1059     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1060 #if defined(__WIN95__)
1061     if (!(lpPos->flags & SWP_NOSIZE))
1062     {
1063         RECT rectClient;
1064         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1065         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1066         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1067         {
1068             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1069             lpPos->x = rectClient.left;
1070             lpPos->y = rectClient.top;
1071             lpPos->cx = rectClient.right - rectClient.left;
1072             lpPos->cy = rectClient.bottom - rectClient.top;
1073         }
1074 #if wxUSE_TOOLBAR
1075         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1076         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1077         {
1078             pFrameWnd->GetToolBar()->Refresh();
1079         }
1080 #endif
1081     }
1082 #endif // Win95
1083
1084     return false;
1085 }
1086
1087 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1088 {
1089     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1090
1091     // let the default window proc calculate the size of MDI children
1092     // frames because it is based on the size of the MDI client window,
1093     // not on the values specified in wxWindow m_max variables
1094     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1095
1096     int minWidth = GetMinWidth(),
1097         minHeight = GetMinHeight();
1098
1099     // but allow GetSizeHints() to set the min size
1100     if ( minWidth != -1 )
1101     {
1102         info->ptMinTrackSize.x = minWidth;
1103
1104         processed = true;
1105     }
1106
1107     if ( minHeight != -1 )
1108     {
1109         info->ptMinTrackSize.y = minHeight;
1110
1111         processed = true;
1112     }
1113
1114     return processed;
1115 }
1116
1117 // ---------------------------------------------------------------------------
1118 // MDI specific message translation/preprocessing
1119 // ---------------------------------------------------------------------------
1120
1121 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1122 {
1123     return DefMDIChildProc(GetHwnd(),
1124                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1125 }
1126
1127 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1128 {
1129     return wxFrame::MSWTranslateMessage(msg);
1130 }
1131
1132 // ---------------------------------------------------------------------------
1133 // misc
1134 // ---------------------------------------------------------------------------
1135
1136 void wxMDIChildFrame::MSWDestroyWindow()
1137 {
1138     invalidHandle = GetHwnd();
1139
1140     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1141
1142     // Must make sure this handle is invalidated (set to NULL) since all sorts
1143     // of things could happen after the child client is destroyed, but before
1144     // the wxFrame is destroyed.
1145
1146     HWND oldHandle = (HWND)GetHWND();
1147     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1148                 (WPARAM)oldHandle, 0);
1149
1150     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1151         ResetWindowStyle((void*) NULL);
1152
1153     invalidHandle = 0;
1154
1155     if (m_hMenu)
1156     {
1157         ::DestroyMenu((HMENU) m_hMenu);
1158         m_hMenu = 0;
1159     }
1160     wxRemoveHandleAssociation(this);
1161     m_hWnd = 0;
1162 }
1163
1164 // Change the client window's extended style so we don't get a client edge
1165 // style when a child is maximised (a double border looks silly.)
1166 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1167 {
1168 #if defined(__WIN95__)
1169     RECT *rect = (RECT *)vrect;
1170     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1171     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1172     if (!pChild || (pChild == this))
1173     {
1174         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1175         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1176
1177         // we want to test whether there is a maximized child, so just set
1178         // dwThisStyle to 0 if there is no child at all
1179         DWORD dwThisStyle = pChild
1180             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1181         DWORD dwNewStyle = dwStyle;
1182         if ( dwThisStyle & WS_MAXIMIZE )
1183             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1184         else
1185             dwNewStyle |= WS_EX_CLIENTEDGE;
1186
1187         if (dwStyle != dwNewStyle)
1188         {
1189             // force update of everything
1190             ::RedrawWindow(hwndClient, NULL, NULL,
1191                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1192             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1193             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1194                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1195                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1196                            SWP_NOCOPYBITS);
1197             if (rect)
1198                 ::GetClientRect(hwndClient, rect);
1199
1200             return true;
1201         }
1202     }
1203 #endif // Win95
1204
1205     return false;
1206 }
1207
1208 // ===========================================================================
1209 // wxMDIClientWindow: the window of predefined (by Windows) class which
1210 // contains the child frames
1211 // ===========================================================================
1212
1213 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1214 {
1215     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1216
1217     CLIENTCREATESTRUCT ccs;
1218     m_windowStyle = style;
1219     m_parent = parent;
1220
1221     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1222     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1223
1224     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1225                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1226
1227     if ( style & wxHSCROLL )
1228         msStyle |= WS_HSCROLL;
1229     if ( style & wxVSCROLL )
1230         msStyle |= WS_VSCROLL;
1231
1232 #if defined(__WIN95__)
1233     DWORD exStyle = WS_EX_CLIENTEDGE;
1234 #else
1235     DWORD exStyle = 0;
1236 #endif
1237
1238     wxWindowCreationHook hook(this);
1239     m_hWnd = (WXHWND)::CreateWindowEx
1240                        (
1241                         exStyle,
1242                         wxT("MDICLIENT"),
1243                         NULL,
1244                         msStyle,
1245                         0, 0, 0, 0,
1246                         GetWinHwnd(parent),
1247                         NULL,
1248                         wxGetInstance(),
1249                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1250     if ( !m_hWnd )
1251     {
1252         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1253
1254         return false;
1255     }
1256
1257     SubclassWin(m_hWnd);
1258
1259     return true;
1260 }
1261
1262 // Explicitly call default scroll behaviour
1263 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1264 {
1265     // Note: for client windows, the scroll position is not set in
1266     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1267     // scroll position we're at.
1268     // This makes it hard to paint patterns or bitmaps in the background,
1269     // and have the client area scrollable as well.
1270
1271     if ( event.GetOrientation() == wxHORIZONTAL )
1272         m_scrollX = event.GetPosition(); // Always returns zero!
1273     else
1274         m_scrollY = event.GetPosition(); // Always returns zero!
1275
1276     event.Skip();
1277 }
1278
1279 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1280 {
1281     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1282     // client area, you can end up with a non-refreshed portion in the client window
1283     // (see OGL studio sample). So check if the position is changed and if so,
1284     // redraw the MDI child frames.
1285
1286     wxPoint oldPos = GetPosition();
1287
1288     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1289
1290     wxPoint newPos = GetPosition();
1291
1292     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1293     {
1294         if (GetParent())
1295         {
1296             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1297             while (node)
1298             {
1299                 wxWindow *child = node->GetData();
1300                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1301                 {
1302                    ::RedrawWindow(GetHwndOf(child),
1303                                   NULL,
1304                                   NULL,
1305                                   RDW_FRAME |
1306                                   RDW_ALLCHILDREN |
1307                                   RDW_INVALIDATE);
1308                 }
1309                 node = node->GetNext();
1310             }
1311         }
1312     }
1313 }
1314
1315 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1316 {
1317     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1318     // in flicker e.g. when the frame contained controls with non-trivial
1319     // layout. Since 2.5.3, the frame is created hidden as all other top level
1320     // windows. In order to maintain backward compatibility, the frame is shown
1321     // in OnIdle, unless Show(false) was called by the programmer before.
1322     if ( m_needsInitialShow )
1323     {
1324         Show(true);
1325     }
1326
1327     // MDI child frames get their WM_SIZE when they're constructed but at this
1328     // moment they don't have any children yet so all child windows will be
1329     // positioned incorrectly when they are added later - to fix this, we
1330     // generate an artificial size event here
1331     if ( m_needsResize )
1332     {
1333         m_needsResize = false; // avoid any possibility of recursion
1334
1335         SendSizeEvent();
1336     }
1337
1338     event.Skip();
1339 }
1340
1341 // ---------------------------------------------------------------------------
1342 // non member functions
1343 // ---------------------------------------------------------------------------
1344
1345 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1346 {
1347     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1348 #ifdef __WIN32__
1349                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow
1350 #else
1351                   0, MAKELPARAM(hmenuFrame, hmenuWindow)
1352 #endif
1353                  );
1354
1355     // update menu bar of the parent window
1356     wxWindow *parent = win->GetParent();
1357     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1358
1359     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1360
1361     ::DrawMenuBar(GetWinHwnd(parent));
1362 }
1363
1364 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1365 {
1366     // Try to insert Window menu in front of Help, otherwise append it.
1367     HMENU hmenu = (HMENU)menu;
1368
1369     if (subMenu)
1370     {
1371         int N = GetMenuItemCount(hmenu);
1372         bool success = false;
1373         for ( int i = 0; i < N; i++ )
1374         {
1375             wxChar buf[256];
1376             int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1377             if ( chars == 0 )
1378             {
1379                 wxLogLastError(wxT("GetMenuString"));
1380
1381                 continue;
1382             }
1383
1384             if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1385             {
1386                 success = true;
1387                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1388                              (UINT)subMenu, _("&Window"));
1389                 break;
1390             }
1391         }
1392
1393         if ( !success )
1394         {
1395             ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1396         }
1397     }
1398
1399     MDISetMenu(win, hmenu, subMenu);
1400 }
1401
1402 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1403 {
1404     HMENU hMenu = (HMENU)menu;
1405
1406     if ( hMenu )
1407     {
1408         wxChar buf[1024];
1409
1410         int N = ::GetMenuItemCount(hMenu);
1411         for ( int i = 0; i < N; i++ )
1412         {
1413             if ( !::GetMenuString(hMenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1414             {
1415                 // Ignore successful read of menu string with length 0 which
1416                 // occurs, for example, for a maximized MDI childs system menu
1417                 if ( ::GetLastError() != 0 )
1418                 {
1419                     wxLogLastError(wxT("GetMenuString"));
1420                 }
1421
1422                 continue;
1423             }
1424
1425             if ( wxStrcmp(buf, _("&Window")) == 0 )
1426             {
1427                 if ( !::RemoveMenu(hMenu, i, MF_BYPOSITION) )
1428                 {
1429                     wxLogLastError(wxT("RemoveMenu"));
1430                 }
1431
1432                 break;
1433             }
1434         }
1435     }
1436
1437     if ( win )
1438     {
1439         // we don't change the windows menu, but we update the main one
1440         MDISetMenu(win, hMenu, NULL);
1441     }
1442 }
1443
1444 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1445                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1446 {
1447     *activate = true;
1448     *hwndAct = (WXHWND)lParam;
1449     *hwndDeact = (WXHWND)wParam;
1450 }
1451
1452 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)
1453