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             // though we don't (usually) resize the MDI client to exactly fit the
 494             // client area we need to pass this one to DefFrameProc to allow the children to show
 495             break;
 496     }
 497
 498     if ( !processed )
 499         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 500
 501     return rc;
 502 }
 503
 504 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 505 {
 506     bool processed = false;
 507
 508     if ( wxWindow::HandleActivate(state, minimized, activate) )
 509     {
 510         // already processed
 511         processed = true;
 512     }
 513
 514     // If this window is an MDI parent, we must also send an OnActivate message
 515     // to the current child.
 516     if ( (m_currentChild != NULL) &&
 517          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 518     {
 519         wxActivateEvent event(wxEVT_ACTIVATE, true, m_currentChild->GetId());
 520         event.SetEventObject( m_currentChild );
 521         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 522             processed = true;
 523     }
 524
 525     return processed;
 526 }
 527
 528 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 529 {
 530     // In case it's e.g. a toolbar.
 531     if ( hwnd )
 532     {
 533         wxWindow *win = wxFindWinFromHandle(hwnd);
 534         if ( win )
 535             return win->MSWCommand(cmd, id);
 536     }
 537
 538     // is it one of standard MDI commands?
 539     WXWPARAM wParam = 0;
 540     WXLPARAM lParam = 0;
 541     int msg;
 542     switch ( id )
 543     {
 544         case IDM_WINDOWCASCADE:
 545             msg = WM_MDICASCADE;
 546             wParam = MDITILE_SKIPDISABLED;
 547             break;
 548
 549         case IDM_WINDOWTILEHOR:
 550             wParam |= MDITILE_HORIZONTAL;
 551             // fall through
 552
 553         case IDM_WINDOWTILEVERT:
 554             if ( !wParam )
 555                 wParam = MDITILE_VERTICAL;
 556             msg = WM_MDITILE;
 557             wParam |= MDITILE_SKIPDISABLED;
 558             break;
 559
 560         case IDM_WINDOWICONS:
 561             msg = WM_MDIICONARRANGE;
 562             break;
 563
 564         case IDM_WINDOWNEXT:
 565             msg = WM_MDINEXT;
 566             lParam = 0;         // next child
 567             break;
 568
 569         case IDM_WINDOWPREV:
 570             msg = WM_MDINEXT;
 571             lParam = 1;         // previous child
 572             break;
 573
 574         default:
 575             msg = 0;
 576     }
 577
 578     if ( msg )
 579     {
 580         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 581
 582         return true;
 583     }
 584
 585     // FIXME VZ: what does this test do??
 586     if (id >= 0xF000)
 587     {
 588         return false; // Get WndProc to call default proc
 589     }
 590
 591     if ( IsMdiCommandId(id) )
 592     {
 593         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 594         while ( node )
 595         {
 596             wxWindow *child = node->GetData();
 597             if ( child->GetHWND() )
 598             {
 599                 long childId = wxGetWindowId(child->GetHWND());
 600                 if (childId == (long)id)
 601                 {
 602                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 603                                    WM_MDIACTIVATE,
 604                                    (WPARAM)child->GetHWND(), 0);
 605                     return true;
 606                 }
 607             }
 608             node = node->GetNext();
 609         }
 610     }
 611     else if ( m_parentFrameActive )
 612     {
 613         return ProcessCommand(id);
 614     }
 615     else if ( m_currentChild )
 616     {
 617         return m_currentChild->HandleCommand(id, cmd, hwnd);
 618     }
 619     else
 620     {
 621         // this shouldn't happen because it means that our messages are being
 622         // lost (they're not sent to the parent frame nor to the children)
 623         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 624     }
 625
 626     return false;
 627 }
 628
 629 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 630                                         WXWPARAM wParam,
 631                                         WXLPARAM lParam)
 632 {
 633     WXHWND clientWnd;
 634     if ( GetClientWindow() )
 635         clientWnd = GetClientWindow()->GetHWND();
 636     else
 637         clientWnd = 0;
 638
 639     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 640 }
 641
 642 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 643 {
 644     MSG *pMsg = (MSG *)msg;
 645
 646     // first let the current child get it
 647     if ( m_currentChild && m_currentChild->GetHWND() &&
 648          m_currentChild->MSWTranslateMessage(msg) )
 649     {
 650         return true;
 651     }
 652
 653     // then try out accel table (will also check the menu accels)
 654     if ( wxFrame::MSWTranslateMessage(msg) )
 655     {
 656         return true;
 657     }
 658
 659     // finally, check for MDI specific built in accel keys
 660     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 661     {
 662         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 663             return true;
 664     }
 665
 666     return false;
 667 }
 668
 669 // ===========================================================================
 670 // wxMDIChildFrame
 671 // ===========================================================================
 672
 673 void wxMDIChildFrame::Init()
 674 {
 675     m_needsResize = true;
 676     m_needsInitialShow = true;
 677 }
 678
 679 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 680                              wxWindowID id,
 681                              const wxString& title,
 682                              const wxPoint& pos,
 683                              const wxSize& size,
 684                              long style,
 685                              const wxString& name)
 686 {
 687   SetName(name);
 688
 689   if ( id != wxID_ANY )
 690     m_windowId = id;
 691   else
 692     m_windowId = (int)NewControlId();
 693
 694   if ( parent )
 695   {
 696       parent->AddChild(this);
 697   }
 698
 699   int x = pos.x;
 700   int y = pos.y;
 701   int width = size.x;
 702   int height = size.y;
 703
 704   MDICREATESTRUCT mcs;
 705
 706   mcs.szClass = style & wxFULL_REPAINT_ON_RESIZE
 707                     ? wxMDIChildFrameClassName
 708                     : wxMDIChildFrameClassNameNoRedraw;
 709   mcs.szTitle = title;
 710   mcs.hOwner = wxGetInstance();
 711   if (x != wxDefaultCoord)
 712       mcs.x = x;
 713   else
 714       mcs.x = CW_USEDEFAULT;
 715
 716   if (y != wxDefaultCoord)
 717       mcs.y = y;
 718   else
 719       mcs.y = CW_USEDEFAULT;
 720
 721   if (width != wxDefaultCoord)
 722       mcs.cx = width;
 723   else
 724       mcs.cx = CW_USEDEFAULT;
 725
 726   if (height != wxDefaultCoord)
 727       mcs.cy = height;
 728   else
 729       mcs.cy = CW_USEDEFAULT;
 730
 731   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 732   if (style & wxMINIMIZE_BOX)
 733     msflags |= WS_MINIMIZEBOX;
 734   if (style & wxMAXIMIZE_BOX)
 735     msflags |= WS_MAXIMIZEBOX;
 736   if (style & wxTHICK_FRAME)
 737     msflags |= WS_THICKFRAME;
 738   if (style & wxSYSTEM_MENU)
 739     msflags |= WS_SYSMENU;
 740   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 741     msflags |= WS_MINIMIZE;
 742   if (style & wxMAXIMIZE)
 743     msflags |= WS_MAXIMIZE;
 744   if (style & wxCAPTION)
 745     msflags |= WS_CAPTION;
 746
 747   mcs.style = msflags;
 748
 749   mcs.lParam = 0;
 750
 751   wxWindowCreationHook hook(this);
 752
 753   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 754                                  WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 755
 756   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 757
 758   return true;
 759 }
 760
 761 wxMDIChildFrame::~wxMDIChildFrame()
 762 {
 763     // will be destroyed by DestroyChildren() but reset them before calling it
 764     // to avoid using dangling pointers if a callback comes in the meanwhile
 765 #if wxUSE_TOOLBAR
 766     m_frameToolBar = NULL;
 767 #endif
 768 #if wxUSE_STATUSBAR
 769     m_frameStatusBar = NULL;
 770 #endif // wxUSE_STATUSBAR
 771
 772     DestroyChildren();
 773
 774     RemoveWindowMenu(NULL, m_hMenu);
 775
 776     MSWDestroyWindow();
 777 }
 778
 779 bool wxMDIChildFrame::Show(bool show)
 780 {
 781     m_needsInitialShow = false;
 782     return wxFrame::Show(show);
 783 }
 784
 785 // Set the client size (i.e. leave the calculation of borders etc.
 786 // to wxWidgets)
 787 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 788 {
 789   HWND hWnd = GetHwnd();
 790
 791   RECT rect;
 792   ::GetClientRect(hWnd, &rect);
 793
 794   RECT rect2;
 795   GetWindowRect(hWnd, &rect2);
 796
 797   // Find the difference between the entire window (title bar and all)
 798   // and the client area; add this to the new client size to move the
 799   // window
 800   int actual_width = rect2.right - rect2.left - rect.right + width;
 801   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 802
 803 #if wxUSE_STATUSBAR
 804   if (GetStatusBar() && GetStatusBar()->IsShown())
 805   {
 806     int sx, sy;
 807     GetStatusBar()->GetSize(&sx, &sy);
 808     actual_height += sy;
 809   }
 810 #endif // wxUSE_STATUSBAR
 811
 812   POINT point;
 813   point.x = rect2.left;
 814   point.y = rect2.top;
 815
 816   // If there's an MDI parent, must subtract the parent's top left corner
 817   // since MoveWindow moves relative to the parent
 818   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 819   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 820
 821   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 822
 823   wxSize size(width, height);
 824   wxSizeEvent event(size, m_windowId);
 825   event.SetEventObject( this );
 826   GetEventHandler()->ProcessEvent(event);
 827 }
 828
 829 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 830 {
 831   RECT rect;
 832   GetWindowRect(GetHwnd(), &rect);
 833   POINT point;
 834   point.x = rect.left;
 835   point.y = rect.top;
 836
 837   // Since we now have the absolute screen coords,
 838   // if there's a parent we must subtract its top left corner
 839   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 840   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 841
 842   if (x)
 843       *x = point.x;
 844   if (y)
 845       *y = point.y;
 846 }
 847
 848 void wxMDIChildFrame::InternalSetMenuBar()
 849 {
 850     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 851
 852     InsertWindowMenu(parent->GetClientWindow(),
 853                      m_hMenu, GetMDIWindowMenu(parent));
 854
 855     parent->m_parentFrameActive = false;
 856 }
 857
 858 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 859 {
 860     // we don't have any standard icons (any more)
 861     return (WXHICON)0;
 862 }
 863
 864 // ---------------------------------------------------------------------------
 865 // MDI operations
 866 // ---------------------------------------------------------------------------
 867
 868 void wxMDIChildFrame::Maximize(bool maximize)
 869 {
 870     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 871     if ( parent && parent->GetClientWindow() )
 872     {
 873         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 874                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 875                       (WPARAM)GetHwnd(), 0);
 876     }
 877 }
 878
 879 void wxMDIChildFrame::Restore()
 880 {
 881     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 882     if ( parent && parent->GetClientWindow() )
 883     {
 884         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 885                       (WPARAM) GetHwnd(), 0);
 886     }
 887 }
 888
 889 void wxMDIChildFrame::Activate()
 890 {
 891     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 892     if ( parent && parent->GetClientWindow() )
 893     {
 894         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 895                       (WPARAM) GetHwnd(), 0);
 896     }
 897 }
 898
 899 // ---------------------------------------------------------------------------
 900 // MDI window proc and message handlers
 901 // ---------------------------------------------------------------------------
 902
 903 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
 904                                     WXWPARAM wParam,
 905                                     WXLPARAM lParam)
 906 {
 907     WXLRESULT rc = 0;
 908     bool processed = false;
 909
 910     switch ( message )
 911     {
 912         case WM_COMMAND:
 913             {
 914                 WORD id, cmd;
 915                 WXHWND hwnd;
 916                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 917                               &id, &hwnd, &cmd);
 918
 919                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 920             }
 921             break;
 922
 923         case WM_GETMINMAXINFO:
 924             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
 925             break;
 926
 927         case WM_MDIACTIVATE:
 928             {
 929                 WXWORD act;
 930                 WXHWND hwndAct, hwndDeact;
 931                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 932
 933                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 934             }
 935             // fall through
 936
 937         case WM_MOVE:
 938             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 939             // scrollbars if necessary
 940
 941             // fall through
 942
 943         case WM_SIZE:
 944             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 945             // things happen
 946             MSWDefWindowProc(message, wParam, lParam);
 947             break;
 948
 949         case WM_SYSCOMMAND:
 950             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 951             // the message (the base class version does not)
 952             return MSWDefWindowProc(message, wParam, lParam);
 953
 954         case WM_WINDOWPOSCHANGING:
 955             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 956             break;
 957     }
 958
 959     if ( !processed )
 960         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 961
 962     return rc;
 963 }
 964
 965 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 966 {
 967     // In case it's e.g. a toolbar.
 968     if ( hwnd )
 969     {
 970         wxWindow *win = wxFindWinFromHandle(hwnd);
 971         if (win)
 972             return win->MSWCommand(cmd, id);
 973     }
 974
 975     if (wxCurrentPopupMenu)
 976     {
 977         wxMenu *popupMenu = wxCurrentPopupMenu;
 978         wxCurrentPopupMenu = NULL;
 979         if (popupMenu->MSWCommand(cmd, id))
 980             return true;
 981     }
 982
 983     bool processed;
 984     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 985     {
 986         processed = ProcessCommand(id);
 987     }
 988     else
 989     {
 990         processed = false;
 991     }
 992
 993     return processed;
 994 }
 995
 996 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 997                                         WXHWND hwndAct,
 998                                         WXHWND hwndDeact)
 999 {
1000     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1001
1002     HMENU menuToSet = 0;
1003
1004     bool activated;
1005
1006     if ( m_hWnd == hwndAct )
1007     {
1008         activated = true;
1009         parent->m_currentChild = this;
1010
1011         HMENU child_menu = (HMENU)GetWinMenu();
1012         if ( child_menu )
1013         {
1014             parent->m_parentFrameActive = false;
1015
1016             menuToSet = child_menu;
1017         }
1018     }
1019     else if ( m_hWnd == hwndDeact )
1020     {
1021         wxASSERT_MSG( parent->m_currentChild == this,
1022                       wxT("can't deactivate MDI child which wasn't active!") );
1023
1024         activated = false;
1025         parent->m_currentChild = NULL;
1026
1027         HMENU parent_menu = (HMENU)parent->GetWinMenu();
1028
1029         // activate the the parent menu only when there is no other child
1030         // that has been activated
1031         if ( parent_menu && !hwndAct )
1032         {
1033             parent->m_parentFrameActive = true;
1034
1035             menuToSet = parent_menu;
1036         }
1037     }
1038     else
1039     {
1040         // we have nothing to do with it
1041         return false;
1042     }
1043
1044     if ( menuToSet )
1045     {
1046         MDISetMenu(parent->GetClientWindow(),
1047                    menuToSet, GetMDIWindowMenu(parent));
1048     }
1049
1050     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1051     event.SetEventObject( this );
1052
1053     ResetWindowStyle((void *)NULL);
1054
1055     return GetEventHandler()->ProcessEvent(event);
1056 }
1057
1058 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1059 {
1060     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1061 #if defined(__WIN95__)
1062     if (!(lpPos->flags & SWP_NOSIZE))
1063     {
1064         RECT rectClient;
1065         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1066         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1067         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1068         {
1069             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1070             lpPos->x = rectClient.left;
1071             lpPos->y = rectClient.top;
1072             lpPos->cx = rectClient.right - rectClient.left;
1073             lpPos->cy = rectClient.bottom - rectClient.top;
1074         }
1075 #if wxUSE_TOOLBAR
1076         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1077         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1078         {
1079             pFrameWnd->GetToolBar()->Refresh();
1080         }
1081 #endif
1082     }
1083 #endif // Win95
1084
1085     return false;
1086 }
1087
1088 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1089 {
1090     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1091
1092     // let the default window proc calculate the size of MDI children
1093     // frames because it is based on the size of the MDI client window,
1094     // not on the values specified in wxWindow m_max variables
1095     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1096
1097     int minWidth = GetMinWidth(),
1098         minHeight = GetMinHeight();
1099
1100     // but allow GetSizeHints() to set the min size
1101     if ( minWidth != -1 )
1102     {
1103         info->ptMinTrackSize.x = minWidth;
1104
1105         processed = true;
1106     }
1107
1108     if ( minHeight != -1 )
1109     {
1110         info->ptMinTrackSize.y = minHeight;
1111
1112         processed = true;
1113     }
1114
1115     return processed;
1116 }
1117
1118 // ---------------------------------------------------------------------------
1119 // MDI specific message translation/preprocessing
1120 // ---------------------------------------------------------------------------
1121
1122 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1123 {
1124     return DefMDIChildProc(GetHwnd(),
1125                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1126 }
1127
1128 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1129 {
1130     return wxFrame::MSWTranslateMessage(msg);
1131 }
1132
1133 // ---------------------------------------------------------------------------
1134 // misc
1135 // ---------------------------------------------------------------------------
1136
1137 void wxMDIChildFrame::MSWDestroyWindow()
1138 {
1139     invalidHandle = GetHwnd();
1140
1141     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1142
1143     // Must make sure this handle is invalidated (set to NULL) since all sorts
1144     // of things could happen after the child client is destroyed, but before
1145     // the wxFrame is destroyed.
1146
1147     HWND oldHandle = (HWND)GetHWND();
1148     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1149                 (WPARAM)oldHandle, 0);
1150
1151     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1152         ResetWindowStyle((void*) NULL);
1153
1154     invalidHandle = 0;
1155
1156     if (m_hMenu)
1157     {
1158         ::DestroyMenu((HMENU) m_hMenu);
1159         m_hMenu = 0;
1160     }
1161     wxRemoveHandleAssociation(this);
1162     m_hWnd = 0;
1163 }
1164
1165 // Change the client window's extended style so we don't get a client edge
1166 // style when a child is maximised (a double border looks silly.)
1167 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1168 {
1169 #if defined(__WIN95__)
1170     RECT *rect = (RECT *)vrect;
1171     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1172     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1173     if (!pChild || (pChild == this))
1174     {
1175         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1176         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1177
1178         // we want to test whether there is a maximized child, so just set
1179         // dwThisStyle to 0 if there is no child at all
1180         DWORD dwThisStyle = pChild
1181             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1182         DWORD dwNewStyle = dwStyle;
1183         if ( dwThisStyle & WS_MAXIMIZE )
1184             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1185         else
1186             dwNewStyle |= WS_EX_CLIENTEDGE;
1187
1188         if (dwStyle != dwNewStyle)
1189         {
1190             // force update of everything
1191             ::RedrawWindow(hwndClient, NULL, NULL,
1192                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1193             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1194             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1195                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1196                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1197                            SWP_NOCOPYBITS);
1198             if (rect)
1199                 ::GetClientRect(hwndClient, rect);
1200
1201             return true;
1202         }
1203     }
1204 #endif // Win95
1205
1206     return false;
1207 }
1208
1209 // ===========================================================================
1210 // wxMDIClientWindow: the window of predefined (by Windows) class which
1211 // contains the child frames
1212 // ===========================================================================
1213
1214 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1215 {
1216     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1217
1218     CLIENTCREATESTRUCT ccs;
1219     m_windowStyle = style;
1220     m_parent = parent;
1221
1222     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1223     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1224
1225     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1226                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1227
1228     if ( style & wxHSCROLL )
1229         msStyle |= WS_HSCROLL;
1230     if ( style & wxVSCROLL )
1231         msStyle |= WS_VSCROLL;
1232
1233 #if defined(__WIN95__)
1234     DWORD exStyle = WS_EX_CLIENTEDGE;
1235 #else
1236     DWORD exStyle = 0;
1237 #endif
1238
1239     wxWindowCreationHook hook(this);
1240     m_hWnd = (WXHWND)::CreateWindowEx
1241                        (
1242                         exStyle,
1243                         wxT("MDICLIENT"),
1244                         NULL,
1245                         msStyle,
1246                         0, 0, 0, 0,
1247                         GetWinHwnd(parent),
1248                         NULL,
1249                         wxGetInstance(),
1250                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1251     if ( !m_hWnd )
1252     {
1253         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1254
1255         return false;
1256     }
1257
1258     SubclassWin(m_hWnd);
1259
1260     return true;
1261 }
1262
1263 // Explicitly call default scroll behaviour
1264 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1265 {
1266     // Note: for client windows, the scroll position is not set in
1267     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1268     // scroll position we're at.
1269     // This makes it hard to paint patterns or bitmaps in the background,
1270     // and have the client area scrollable as well.
1271
1272     if ( event.GetOrientation() == wxHORIZONTAL )
1273         m_scrollX = event.GetPosition(); // Always returns zero!
1274     else
1275         m_scrollY = event.GetPosition(); // Always returns zero!
1276
1277     event.Skip();
1278 }
1279
1280 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1281 {
1282     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1283     // client area, you can end up with a non-refreshed portion in the client window
1284     // (see OGL studio sample). So check if the position is changed and if so,
1285     // redraw the MDI child frames.
1286
1287     wxPoint oldPos = GetPosition();
1288
1289     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1290
1291     wxPoint newPos = GetPosition();
1292
1293     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1294     {
1295         if (GetParent())
1296         {
1297             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1298             while (node)
1299             {
1300                 wxWindow *child = node->GetData();
1301                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1302                 {
1303                    ::RedrawWindow(GetHwndOf(child),
1304                                   NULL,
1305                                   NULL,
1306                                   RDW_FRAME |
1307                                   RDW_ALLCHILDREN |
1308                                   RDW_INVALIDATE);
1309                 }
1310                 node = node->GetNext();
1311             }
1312         }
1313     }
1314 }
1315
1316 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1317 {
1318     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1319     // in flicker e.g. when the frame contained controls with non-trivial
1320     // layout. Since 2.5.3, the frame is created hidden as all other top level
1321     // windows. In order to maintain backward compatibility, the frame is shown
1322     // in OnIdle, unless Show(false) was called by the programmer before.
1323     if ( m_needsInitialShow )
1324     {
1325         Show(true);
1326     }
1327
1328     // MDI child frames get their WM_SIZE when they're constructed but at this
1329     // moment they don't have any children yet so all child windows will be
1330     // positioned incorrectly when they are added later - to fix this, we
1331     // generate an artificial size event here
1332     if ( m_needsResize )
1333     {
1334         m_needsResize = false; // avoid any possibility of recursion
1335
1336         SendSizeEvent();
1337     }
1338
1339     event.Skip();
1340 }
1341
1342 // ---------------------------------------------------------------------------
1343 // non member functions
1344 // ---------------------------------------------------------------------------
1345
1346 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1347 {
1348     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1349 #ifdef __WIN32__
1350                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow
1351 #else
1352                   0, MAKELPARAM(hmenuFrame, hmenuWindow)
1353 #endif
1354                  );
1355
1356     // update menu bar of the parent window
1357     wxWindow *parent = win->GetParent();
1358     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1359
1360     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1361
1362     ::DrawMenuBar(GetWinHwnd(parent));
1363 }
1364
1365 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1366 {
1367     // Try to insert Window menu in front of Help, otherwise append it.
1368     HMENU hmenu = (HMENU)menu;
1369
1370     if (subMenu)
1371     {
1372         int N = GetMenuItemCount(hmenu);
1373         bool success = false;
1374         for ( int i = 0; i < N; i++ )
1375         {
1376             wxChar buf[256];
1377             int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1378             if ( chars == 0 )
1379             {
1380                 wxLogLastError(wxT("GetMenuString"));
1381
1382                 continue;
1383             }
1384
1385             if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1386             {
1387                 success = true;
1388                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1389                              (UINT)subMenu, _("&Window"));
1390                 break;
1391             }
1392         }
1393
1394         if ( !success )
1395         {
1396             ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1397         }
1398     }
1399
1400     MDISetMenu(win, hmenu, subMenu);
1401 }
1402
1403 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1404 {
1405     HMENU hMenu = (HMENU)menu;
1406
1407     if ( hMenu )
1408     {
1409         wxChar buf[1024];
1410
1411         int N = ::GetMenuItemCount(hMenu);
1412         for ( int i = 0; i < N; i++ )
1413         {
1414             if ( !::GetMenuString(hMenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1415             {
1416                 // Ignore successful read of menu string with length 0 which
1417                 // occurs, for example, for a maximized MDI childs system menu
1418                 if ( ::GetLastError() != 0 )
1419                 {
1420                     wxLogLastError(wxT("GetMenuString"));
1421                 }
1422
1423                 continue;
1424             }
1425
1426             if ( wxStrcmp(buf, _("&Window")) == 0 )
1427             {
1428                 if ( !::RemoveMenu(hMenu, i, MF_BYPOSITION) )
1429                 {
1430                     wxLogLastError(wxT("RemoveMenu"));
1431                 }
1432
1433                 break;
1434             }
1435         }
1436     }
1437
1438     if ( win )
1439     {
1440         // we don't change the windows menu, but we update the main one
1441         MDISetMenu(win, hMenu, NULL);
1442     }
1443 }
1444
1445 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1446                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1447 {
1448     *activate = true;
1449     *hwndAct = (WXHWND)lParam;
1450     *hwndDeact = (WXHWND)wParam;
1451 }
1452
1453 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)
1454