src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/mdi.cpp
   3 // Purpose:     MDI classes for wxMSW
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin on 2008-11-04 to use the base classes
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 //              (c) 2008-2009 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ===========================================================================
  14 // declarations
  15 // ===========================================================================
  16
  17 // ---------------------------------------------------------------------------
  18 // headers
  19 // ---------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_MDI && !defined(__WXUNIVERSAL__)
  29
  30 #include "wx/mdi.h"
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/frame.h"
  34     #include "wx/menu.h"
  35     #include "wx/app.h"
  36     #include "wx/utils.h"
  37     #include "wx/dialog.h"
  38     #include "wx/statusbr.h"
  39     #include "wx/settings.h"
  40     #include "wx/intl.h"
  41     #include "wx/log.h"
  42     #include "wx/toolbar.h"
  43 #endif
  44
  45 #include "wx/stockitem.h"
  46 #include "wx/msw/private.h"
  47
  48 #include <string.h>
  49
  50 // ---------------------------------------------------------------------------
  51 // global variables
  52 // ---------------------------------------------------------------------------
  53
  54 extern wxMenu *wxCurrentPopupMenu;
  55
  56 extern void wxRemoveHandleAssociation(wxWindow *win);
  57
  58 // ---------------------------------------------------------------------------
  59 // constants
  60 // ---------------------------------------------------------------------------
  61
  62 static const int IDM_WINDOWTILEHOR  = 4001;
  63 static const int IDM_WINDOWCASCADE = 4002;
  64 static const int IDM_WINDOWICONS = 4003;
  65 static const int IDM_WINDOWNEXT = 4004;
  66 static const int IDM_WINDOWTILEVERT = 4005;
  67 static const int IDM_WINDOWPREV = 4006;
  68
  69 // This range gives a maximum of 500 MDI children. Should be enough :-)
  70 static const int wxFIRST_MDI_CHILD = 4100;
  71 static const int wxLAST_MDI_CHILD = 4600;
  72
  73 // ---------------------------------------------------------------------------
  74 // private functions
  75 // ---------------------------------------------------------------------------
  76
  77 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  78 // of the parent of win (which is supposed to be the MDI client window)
  79 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
  80
  81 // insert the window menu (subMenu) into menu just before "Help" submenu or at
  82 // the very end if not found
  83 static void MDIInsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
  84
  85 // Remove the window menu
  86 static void MDIRemoveWindowMenu(wxWindow *win, WXHMENU menu);
  87
  88 // is this an id of an MDI child?
  89 inline bool IsMdiCommandId(int id)
  90 {
  91     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
  92 }
  93
  94 // unpack the parameters of WM_MDIACTIVATE message
  95 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
  96                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
  97
  98 // return the HMENU of the MDI menu
  99 //
 100 // this function works correctly even when we don't have a window menu and just
 101 // returns 0 then
 102 static inline HMENU GetMDIWindowMenu(wxMDIParentFrame *frame)
 103 {
 104     wxMenu *menu = frame->GetWindowMenu();
 105     return menu ? GetHmenuOf(menu) : 0;
 106 }
 107
 108 // ===========================================================================
 109 // implementation
 110 // ===========================================================================
 111
 112 // ---------------------------------------------------------------------------
 113 // wxWin macros
 114 // ---------------------------------------------------------------------------
 115
 116 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 117 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 118 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 119
 120 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 121     EVT_SIZE(wxMDIParentFrame::OnSize)
 122     EVT_ICONIZE(wxMDIParentFrame::OnIconized)
 123     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 124 END_EVENT_TABLE()
 125
 126 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 127     EVT_IDLE(wxMDIChildFrame::OnIdle)
 128 END_EVENT_TABLE()
 129
 130 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 131     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 132 END_EVENT_TABLE()
 133
 134 // ===========================================================================
 135 // wxMDIParentFrame: the frame which contains the client window which manages
 136 // the children
 137 // ===========================================================================
 138
 139 wxMDIParentFrame::wxMDIParentFrame()
 140 {
 141     m_parentFrameActive = true;
 142 }
 143
 144 bool wxMDIParentFrame::Create(wxWindow *parent,
 145                               wxWindowID id,
 146                               const wxString& title,
 147                               const wxPoint& pos,
 148                               const wxSize& size,
 149                               long style,
 150                               const wxString& name)
 151 {
 152   // this style can be used to prevent a window from having the standard MDI
 153   // "Window" menu
 154   if ( !(style & wxFRAME_NO_WINDOW_MENU) )
 155   {
 156       // normal case: we have the window menu, so construct it
 157       m_windowMenu = new wxMenu;
 158
 159       m_windowMenu->Append(IDM_WINDOWCASCADE, _("&Cascade"));
 160       m_windowMenu->Append(IDM_WINDOWTILEHOR, _("Tile &Horizontally"));
 161       m_windowMenu->Append(IDM_WINDOWTILEVERT, _("Tile &Vertically"));
 162       m_windowMenu->AppendSeparator();
 163       m_windowMenu->Append(IDM_WINDOWICONS, _("&Arrange Icons"));
 164       m_windowMenu->Append(IDM_WINDOWNEXT, _("&Next"));
 165       m_windowMenu->Append(IDM_WINDOWPREV, _("&Previous"));
 166   }
 167
 168   m_parentFrameActive = true;
 169
 170   if (!parent)
 171     wxTopLevelWindows.Append(this);
 172
 173   SetName(name);
 174   m_windowStyle = style;
 175
 176   if ( parent )
 177       parent->AddChild(this);
 178
 179   if ( id != wxID_ANY )
 180     m_windowId = id;
 181   else
 182     m_windowId = NewControlId();
 183
 184   WXDWORD exflags;
 185   WXDWORD msflags = MSWGetCreateWindowFlags(&exflags);
 186   msflags &= ~WS_VSCROLL;
 187   msflags &= ~WS_HSCROLL;
 188
 189   if ( !wxWindow::MSWCreate(wxApp::GetRegisteredClassName(_T("wxMDIFrame")),
 190                             title.wx_str(),
 191                             pos, size,
 192                             msflags,
 193                             exflags) )
 194   {
 195       return false;
 196   }
 197
 198   SetOwnBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 199
 200   // unlike (almost?) all other windows, frames are created hidden
 201   m_isShown = false;
 202
 203   return true;
 204 }
 205
 206 wxMDIParentFrame::~wxMDIParentFrame()
 207 {
 208     // see comment in ~wxMDIChildFrame
 209 #if wxUSE_TOOLBAR
 210     m_frameToolBar = NULL;
 211 #endif
 212 #if wxUSE_STATUSBAR
 213     m_frameStatusBar = NULL;
 214 #endif // wxUSE_STATUSBAR
 215
 216     DestroyChildren();
 217
 218     // the MDI frame menubar is not automatically deleted by Windows unlike for
 219     // the normal frames
 220     if ( m_hMenu )
 221         ::DestroyMenu((HMENU)m_hMenu);
 222
 223     if ( m_clientWindow )
 224     {
 225         if ( m_clientWindow->MSWGetOldWndProc() )
 226             m_clientWindow->UnsubclassWin();
 227
 228         m_clientWindow->SetHWND(0);
 229         delete m_clientWindow;
 230     }
 231 }
 232
 233 // ----------------------------------------------------------------------------
 234 // wxMDIParentFrame child management
 235 // ----------------------------------------------------------------------------
 236
 237 int wxMDIParentFrame::GetChildFramesCount() const
 238 {
 239     int count = 0;
 240     for ( wxWindowList::const_iterator i = GetChildren().begin();
 241           i != GetChildren().end();
 242           ++i )
 243     {
 244         if ( wxDynamicCast(*i, wxMDIChildFrame) )
 245             count++;
 246     }
 247
 248     return count;
 249 }
 250
 251 void wxMDIParentFrame::AddMDIChild(wxMDIChildFrame * WXUNUSED(child))
 252 {
 253     switch ( GetChildFramesCount() )
 254     {
 255         case 1:
 256             // first MDI child was just added, we need to insert the window
 257             // menu now if we have it
 258             AddWindowMenu();
 259
 260             // and disable the items which can't be used until we have more
 261             // than one child
 262             UpdateWindowMenu(false);
 263             break;
 264
 265         case 2:
 266             // second MDI child was added, enable the menu items which were
 267             // disabled because they didn't make sense for a single window
 268             UpdateWindowMenu(true);
 269             break;
 270     }
 271 }
 272
 273 void wxMDIParentFrame::RemoveMDIChild(wxMDIChildFrame * WXUNUSED(child))
 274 {
 275     switch ( GetChildFramesCount() )
 276     {
 277         case 1:
 278             // last MDI child is being removed, remove the now unnecessary
 279             // window menu too
 280             RemoveWindowMenu();
 281
 282             // there is no need to call UpdateWindowMenu(true) here so this is
 283             // not quite symmetric to AddMDIChild() above
 284             break;
 285
 286         case 2:
 287             // only one MDI child is going to remain, disable the menu commands
 288             // which don't make sense for a single child window
 289             UpdateWindowMenu(false);
 290             break;
 291     }
 292 }
 293
 294 // ----------------------------------------------------------------------------
 295 // wxMDIParentFrame window menu handling
 296 // ----------------------------------------------------------------------------
 297
 298 void wxMDIParentFrame::AddWindowMenu()
 299 {
 300     if ( m_windowMenu )
 301         MDIInsertWindowMenu(GetClientWindow(), m_hMenu, GetMDIWindowMenu(this));
 302 }
 303
 304 void wxMDIParentFrame::RemoveWindowMenu()
 305 {
 306     if ( m_windowMenu )
 307         MDIRemoveWindowMenu(GetClientWindow(), m_hMenu);
 308 }
 309
 310 void wxMDIParentFrame::UpdateWindowMenu(bool enable)
 311 {
 312     if ( m_windowMenu )
 313     {
 314         m_windowMenu->Enable(IDM_WINDOWNEXT, enable);
 315         m_windowMenu->Enable(IDM_WINDOWPREV, enable);
 316     }
 317 }
 318
 319 #if wxUSE_MENUS_NATIVE
 320
 321 void wxMDIParentFrame::InternalSetMenuBar()
 322 {
 323     m_parentFrameActive = true;
 324
 325     if ( GetActiveChild() )
 326     {
 327         AddWindowMenu();
 328     }
 329     else // we don't have any MDI children yet
 330     {
 331         // wait until we do to add the window menu but do set the main menu for
 332         // now (this is done by AddWindowMenu() as a side effect)
 333         MDISetMenu(GetClientWindow(), (HMENU)m_hMenu, NULL);
 334     }
 335 }
 336
 337 #endif // wxUSE_MENUS_NATIVE
 338
 339 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 340 {
 341     // notice that Remove/AddWindowMenu() are safe to call even when
 342     // m_windowMenu is NULL
 343     RemoveWindowMenu();
 344
 345     delete m_windowMenu;
 346
 347     m_windowMenu = menu;
 348
 349     AddWindowMenu();
 350 }
 351
 352 void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
 353 {
 354     wxMDIChildFrame *child = GetActiveChild();
 355     if ( child )
 356     {
 357         wxEvtHandler* source = child->GetEventHandler();
 358         wxMenuBar* bar = child->GetMenuBar();
 359
 360         if (menu)
 361         {
 362             menu->UpdateUI(source);
 363         }
 364         else
 365         {
 366             if ( bar != NULL )
 367             {
 368                 int nCount = bar->GetMenuCount();
 369                 for (int n = 0; n < nCount; n++)
 370                     bar->GetMenu(n)->UpdateUI(source);
 371             }
 372         }
 373     }
 374     else
 375     {
 376         wxFrameBase::DoMenuUpdates(menu);
 377     }
 378 }
 379
 380 const wxMenuItem *wxMDIParentFrame::FindItemInMenuBar(int menuId) const
 381 {
 382     const wxMenuItem *item = wxFrame::FindItemInMenuBar(menuId);
 383     if ( !item && m_currentChild )
 384     {
 385         item = m_currentChild->FindItemInMenuBar(menuId);
 386     }
 387
 388     return item;
 389 }
 390
 391 void wxMDIParentFrame::UpdateClientSize()
 392 {
 393     if ( GetClientWindow() )
 394     {
 395         int width, height;
 396         GetClientSize(&width, &height);
 397
 398         GetClientWindow()->SetSize(0, 0, width, height);
 399     }
 400 }
 401
 402 void wxMDIParentFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 403 {
 404     UpdateClientSize();
 405
 406     // do not call event.Skip() here, it somehow messes up MDI client window
 407 }
 408
 409 void wxMDIParentFrame::OnIconized(wxIconizeEvent& event)
 410 {
 411     event.Skip();
 412
 413     if ( !event.IsIconized() )
 414         UpdateClientSize();
 415 }
 416
 417 // Returns the active MDI child window
 418 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 419 {
 420     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 421                                     WM_MDIGETACTIVE, 0, 0L);
 422     if ( hWnd == 0 )
 423         return NULL;
 424
 425     return (wxMDIChildFrame *)wxFindWinFromHandle(hWnd);
 426 }
 427
 428 // Responds to colour changes, and passes event on to children.
 429 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 430 {
 431     if ( m_clientWindow )
 432     {
 433         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 434         m_clientWindow->Refresh();
 435     }
 436
 437     event.Skip();
 438 }
 439
 440 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 441 {
 442     // we don't have any standard icons (any more)
 443     return (WXHICON)0;
 444 }
 445
 446 // ---------------------------------------------------------------------------
 447 // MDI operations
 448 // ---------------------------------------------------------------------------
 449
 450 void wxMDIParentFrame::Cascade()
 451 {
 452     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 453 }
 454
 455 void wxMDIParentFrame::Tile(wxOrientation orient)
 456 {
 457     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 458                   _T("invalid orientation value") );
 459
 460     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 461                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 462                                          : MDITILE_VERTICAL, 0);
 463 }
 464
 465 void wxMDIParentFrame::ArrangeIcons()
 466 {
 467     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 468 }
 469
 470 void wxMDIParentFrame::ActivateNext()
 471 {
 472     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 473 }
 474
 475 void wxMDIParentFrame::ActivatePrevious()
 476 {
 477     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 478 }
 479
 480 // ---------------------------------------------------------------------------
 481 // the MDI parent frame window proc
 482 // ---------------------------------------------------------------------------
 483
 484 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 485                                      WXWPARAM wParam,
 486                                      WXLPARAM lParam)
 487 {
 488     WXLRESULT rc = 0;
 489     bool processed = false;
 490
 491     switch ( message )
 492     {
 493         case WM_ACTIVATE:
 494             {
 495                 WXWORD state, minimized;
 496                 WXHWND hwnd;
 497                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 498
 499                 processed = HandleActivate(state, minimized != 0, hwnd);
 500             }
 501             break;
 502
 503         case WM_COMMAND:
 504             {
 505                 WXWORD id, cmd;
 506                 WXHWND hwnd;
 507                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 508
 509                 (void)HandleCommand(id, cmd, hwnd);
 510
 511                 // even if the frame didn't process it, there is no need to try it
 512                 // once again (i.e. call wxFrame::HandleCommand()) - we just did it,
 513                 // so pretend we processed the message anyhow
 514                 processed = true;
 515             }
 516
 517             // always pass this message DefFrameProc(), otherwise MDI menu
 518             // commands (and sys commands - more surprisingly!) won't work
 519             MSWDefWindowProc(message, wParam, lParam);
 520             break;
 521
 522         case WM_CREATE:
 523             m_clientWindow = OnCreateClient();
 524             // Uses own style for client style
 525             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 526             {
 527                 wxLogMessage(_("Failed to create MDI parent frame."));
 528
 529                 rc = -1;
 530             }
 531
 532             processed = true;
 533             break;
 534
 535         case WM_ERASEBKGND:
 536             processed = true;
 537
 538             // we erase background ourselves
 539             rc = true;
 540             break;
 541
 542         case WM_SIZE:
 543             // though we don't (usually) resize the MDI client to exactly fit the
 544             // client area we need to pass this one to DefFrameProc to allow the children to show
 545             break;
 546     }
 547
 548     if ( !processed )
 549         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 550
 551     return rc;
 552 }
 553
 554 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 555 {
 556     bool processed = false;
 557
 558     if ( wxWindow::HandleActivate(state, minimized, activate) )
 559     {
 560         // already processed
 561         processed = true;
 562     }
 563
 564     // If this window is an MDI parent, we must also send an OnActivate message
 565     // to the current child.
 566     if ( (m_currentChild != NULL) &&
 567          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 568     {
 569         wxActivateEvent event(wxEVT_ACTIVATE, true, m_currentChild->GetId());
 570         event.SetEventObject( m_currentChild );
 571         if ( m_currentChild->HandleWindowEvent(event) )
 572             processed = true;
 573     }
 574
 575     return processed;
 576 }
 577
 578 bool wxMDIParentFrame::HandleCommand(WXWORD id_, WXWORD cmd, WXHWND hwnd)
 579 {
 580     // sign extend to int from short before comparing with the other int ids
 581     int id = (signed short)id_;
 582
 583     // In case it's e.g. a toolbar.
 584     if ( hwnd )
 585     {
 586         wxWindow *win = wxFindWinFromHandle(hwnd);
 587         if ( win )
 588             return win->MSWCommand(cmd, id);
 589     }
 590
 591     if (wxCurrentPopupMenu)
 592     {
 593         wxMenu *popupMenu = wxCurrentPopupMenu;
 594         wxCurrentPopupMenu = NULL;
 595         if (popupMenu->MSWCommand(cmd, id))
 596             return true;
 597     }
 598
 599     // is it one of standard MDI commands?
 600     WXWPARAM wParam = 0;
 601     WXLPARAM lParam = 0;
 602     int msg;
 603     switch ( id )
 604     {
 605         case IDM_WINDOWCASCADE:
 606             msg = WM_MDICASCADE;
 607             wParam = MDITILE_SKIPDISABLED;
 608             break;
 609
 610         case IDM_WINDOWTILEHOR:
 611             wParam |= MDITILE_HORIZONTAL;
 612             // fall through
 613
 614         case IDM_WINDOWTILEVERT:
 615             if ( !wParam )
 616                 wParam = MDITILE_VERTICAL;
 617             msg = WM_MDITILE;
 618             wParam |= MDITILE_SKIPDISABLED;
 619             break;
 620
 621         case IDM_WINDOWICONS:
 622             msg = WM_MDIICONARRANGE;
 623             break;
 624
 625         case IDM_WINDOWNEXT:
 626             msg = WM_MDINEXT;
 627             lParam = 0;         // next child
 628             break;
 629
 630         case IDM_WINDOWPREV:
 631             msg = WM_MDINEXT;
 632             lParam = 1;         // previous child
 633             break;
 634
 635         default:
 636             msg = 0;
 637     }
 638
 639     if ( msg )
 640     {
 641         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 642
 643         return true;
 644     }
 645
 646     // FIXME VZ: what does this test do??
 647     if (id >= 0xF000)
 648     {
 649         return false; // Get WndProc to call default proc
 650     }
 651
 652     if ( IsMdiCommandId(id) )
 653     {
 654         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 655         while ( node )
 656         {
 657             wxWindow *child = node->GetData();
 658             if ( child->GetHWND() )
 659             {
 660                 int childId = wxGetWindowId(child->GetHWND());
 661                 if ( childId == (signed short)id )
 662                 {
 663                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 664                                    WM_MDIACTIVATE,
 665                                    (WPARAM)child->GetHWND(), 0);
 666                     return true;
 667                 }
 668             }
 669             node = node->GetNext();
 670         }
 671     }
 672     else if ( m_parentFrameActive )
 673     {
 674         return ProcessCommand(id);
 675     }
 676     else if ( m_currentChild )
 677     {
 678         return m_currentChild->HandleCommand(id, cmd, hwnd);
 679     }
 680     else
 681     {
 682         // this shouldn't happen because it means that our messages are being
 683         // lost (they're not sent to the parent frame nor to the children)
 684         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 685     }
 686
 687     return false;
 688 }
 689
 690 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 691                                         WXWPARAM wParam,
 692                                         WXLPARAM lParam)
 693 {
 694     WXHWND clientWnd;
 695     if ( GetClientWindow() )
 696         clientWnd = GetClientWindow()->GetHWND();
 697     else
 698         clientWnd = 0;
 699
 700     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 701 }
 702
 703 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 704 {
 705     MSG *pMsg = (MSG *)msg;
 706
 707     // first let the current child get it
 708     if ( m_currentChild && m_currentChild->GetHWND() &&
 709          m_currentChild->MSWTranslateMessage(msg) )
 710     {
 711         return true;
 712     }
 713
 714     // then try out accel table (will also check the menu accels)
 715     if ( wxFrame::MSWTranslateMessage(msg) )
 716     {
 717         return true;
 718     }
 719
 720     // finally, check for MDI specific built in accel keys
 721     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 722     {
 723         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 724             return true;
 725     }
 726
 727     return false;
 728 }
 729
 730 // ===========================================================================
 731 // wxMDIChildFrame
 732 // ===========================================================================
 733
 734 void wxMDIChildFrame::Init()
 735 {
 736     m_needsResize = true;
 737     m_needsInitialShow = true;
 738 }
 739
 740 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 741                              wxWindowID id,
 742                              const wxString& title,
 743                              const wxPoint& pos,
 744                              const wxSize& size,
 745                              long style,
 746                              const wxString& name)
 747 {
 748     m_mdiParent = parent;
 749
 750   SetName(name);
 751
 752   if ( id != wxID_ANY )
 753     m_windowId = id;
 754   else
 755     m_windowId = NewControlId();
 756
 757   if ( parent )
 758   {
 759       parent->AddChild(this);
 760   }
 761
 762   int x = pos.x;
 763   int y = pos.y;
 764   int width = size.x;
 765   int height = size.y;
 766
 767   MDICREATESTRUCT mcs;
 768
 769   wxString className =
 770       wxApp::GetRegisteredClassName(_T("wxMDIChildFrame"), COLOR_WINDOW);
 771   if ( !(style & wxFULL_REPAINT_ON_RESIZE) )
 772       className += wxApp::GetNoRedrawClassSuffix();
 773
 774   mcs.szClass = className.wx_str();
 775   mcs.szTitle = title.wx_str();
 776   mcs.hOwner = wxGetInstance();
 777   if (x != wxDefaultCoord)
 778       mcs.x = x;
 779   else
 780       mcs.x = CW_USEDEFAULT;
 781
 782   if (y != wxDefaultCoord)
 783       mcs.y = y;
 784   else
 785       mcs.y = CW_USEDEFAULT;
 786
 787   if (width != wxDefaultCoord)
 788       mcs.cx = width;
 789   else
 790       mcs.cx = CW_USEDEFAULT;
 791
 792   if (height != wxDefaultCoord)
 793       mcs.cy = height;
 794   else
 795       mcs.cy = CW_USEDEFAULT;
 796
 797   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 798   if (style & wxMINIMIZE_BOX)
 799     msflags |= WS_MINIMIZEBOX;
 800   if (style & wxMAXIMIZE_BOX)
 801     msflags |= WS_MAXIMIZEBOX;
 802   if (style & wxRESIZE_BORDER)
 803     msflags |= WS_THICKFRAME;
 804   if (style & wxSYSTEM_MENU)
 805     msflags |= WS_SYSMENU;
 806   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 807     msflags |= WS_MINIMIZE;
 808   if (style & wxMAXIMIZE)
 809     msflags |= WS_MAXIMIZE;
 810   if (style & wxCAPTION)
 811     msflags |= WS_CAPTION;
 812
 813   mcs.style = msflags;
 814
 815   mcs.lParam = 0;
 816
 817   wxWindowCreationHook hook(this);
 818
 819   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 820                                  WM_MDICREATE, 0, (LPARAM)&mcs);
 821
 822   if ( !m_hWnd )
 823   {
 824       wxLogLastError(_T("WM_MDICREATE"));
 825       return false;
 826   }
 827
 828   SubclassWin(m_hWnd);
 829
 830   parent->AddMDIChild(this);
 831
 832   return true;
 833 }
 834
 835 wxMDIChildFrame::~wxMDIChildFrame()
 836 {
 837     // if we hadn't been created, there is nothing to destroy
 838     if ( !m_hWnd )
 839         return;
 840
 841     GetMDIParent()->RemoveMDIChild(this);
 842
 843     // will be destroyed by DestroyChildren() but reset them before calling it
 844     // to avoid using dangling pointers if a callback comes in the meanwhile
 845 #if wxUSE_TOOLBAR
 846     m_frameToolBar = NULL;
 847 #endif
 848 #if wxUSE_STATUSBAR
 849     m_frameStatusBar = NULL;
 850 #endif // wxUSE_STATUSBAR
 851
 852     DestroyChildren();
 853
 854     MDIRemoveWindowMenu(NULL, m_hMenu);
 855
 856     MSWDestroyWindow();
 857 }
 858
 859 bool wxMDIChildFrame::Show(bool show)
 860 {
 861     m_needsInitialShow = false;
 862
 863     if (!wxFrame::Show(show))
 864         return false;
 865
 866     // KH: Without this call, new MDI children do not become active.
 867     // This was added here after the same BringWindowToTop call was
 868     // removed from wxTopLevelWindow::Show (November 2005)
 869     if ( show )
 870         ::BringWindowToTop(GetHwnd());
 871
 872     // we need to refresh the MDI frame window menu to include (or exclude if
 873     // we've been hidden) this frame
 874     wxMDIParentFrame * const parent = GetMDIParent();
 875     MDISetMenu(parent->GetClientWindow(), NULL, NULL);
 876
 877     return true;
 878 }
 879
 880 // Set the client size (i.e. leave the calculation of borders etc.
 881 // to wxWidgets)
 882 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 883 {
 884   HWND hWnd = GetHwnd();
 885
 886   RECT rect;
 887   ::GetClientRect(hWnd, &rect);
 888
 889   RECT rect2;
 890   GetWindowRect(hWnd, &rect2);
 891
 892   // Find the difference between the entire window (title bar and all)
 893   // and the client area; add this to the new client size to move the
 894   // window
 895   int actual_width = rect2.right - rect2.left - rect.right + width;
 896   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 897
 898 #if wxUSE_STATUSBAR
 899   if (GetStatusBar() && GetStatusBar()->IsShown())
 900   {
 901     int sx, sy;
 902     GetStatusBar()->GetSize(&sx, &sy);
 903     actual_height += sy;
 904   }
 905 #endif // wxUSE_STATUSBAR
 906
 907   POINT point;
 908   point.x = rect2.left;
 909   point.y = rect2.top;
 910
 911   // If there's an MDI parent, must subtract the parent's top left corner
 912   // since MoveWindow moves relative to the parent
 913   wxMDIParentFrame * const mdiParent = GetMDIParent();
 914   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 915
 916   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 917
 918   wxSize size(width, height);
 919   wxSizeEvent event(size, m_windowId);
 920   event.SetEventObject( this );
 921   HandleWindowEvent(event);
 922 }
 923
 924 // Unlike other wxTopLevelWindowBase, the mdi child's "GetPosition" is not the
 925 //  same as its GetScreenPosition
 926 void wxMDIChildFrame::DoGetScreenPosition(int *x, int *y) const
 927 {
 928   HWND hWnd = GetHwnd();
 929
 930   RECT rect;
 931   ::GetWindowRect(hWnd, &rect);
 932   if (x)
 933      *x = rect.left;
 934   if (y)
 935      *y = rect.top;
 936 }
 937
 938
 939 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 940 {
 941   RECT rect;
 942   GetWindowRect(GetHwnd(), &rect);
 943   POINT point;
 944   point.x = rect.left;
 945   point.y = rect.top;
 946
 947   // Since we now have the absolute screen coords,
 948   // if there's a parent we must subtract its top left corner
 949   wxMDIParentFrame * const mdiParent = GetMDIParent();
 950   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 951
 952   if (x)
 953       *x = point.x;
 954   if (y)
 955       *y = point.y;
 956 }
 957
 958 void wxMDIChildFrame::InternalSetMenuBar()
 959 {
 960     wxMDIParentFrame * const parent = GetMDIParent();
 961
 962     MDIInsertWindowMenu(parent->GetClientWindow(),
 963                      m_hMenu, GetMDIWindowMenu(parent));
 964
 965     parent->m_parentFrameActive = false;
 966 }
 967
 968 void wxMDIChildFrame::DetachMenuBar()
 969 {
 970     MDIRemoveWindowMenu(NULL, m_hMenu);
 971     wxFrame::DetachMenuBar();
 972 }
 973
 974 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 975 {
 976     // we don't have any standard icons (any more)
 977     return (WXHICON)0;
 978 }
 979
 980 // ---------------------------------------------------------------------------
 981 // MDI operations
 982 // ---------------------------------------------------------------------------
 983
 984 void wxMDIChildFrame::Maximize(bool maximize)
 985 {
 986     wxMDIParentFrame * const parent = GetMDIParent();
 987     if ( parent && parent->GetClientWindow() )
 988     {
 989         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 990                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 991                       (WPARAM)GetHwnd(), 0);
 992     }
 993 }
 994
 995 void wxMDIChildFrame::Restore()
 996 {
 997     wxMDIParentFrame * const parent = GetMDIParent();
 998     if ( parent && parent->GetClientWindow() )
 999     {
1000         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
1001                       (WPARAM) GetHwnd(), 0);
1002     }
1003 }
1004
1005 void wxMDIChildFrame::Activate()
1006 {
1007     wxMDIParentFrame * const parent = GetMDIParent();
1008     if ( parent && parent->GetClientWindow() )
1009     {
1010         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
1011                       (WPARAM) GetHwnd(), 0);
1012     }
1013 }
1014
1015 // ---------------------------------------------------------------------------
1016 // MDI window proc and message handlers
1017 // ---------------------------------------------------------------------------
1018
1019 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
1020                                     WXWPARAM wParam,
1021                                     WXLPARAM lParam)
1022 {
1023     WXLRESULT rc = 0;
1024     bool processed = false;
1025
1026     switch ( message )
1027     {
1028         case WM_COMMAND:
1029             {
1030                 WORD id, cmd;
1031                 WXHWND hwnd;
1032                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
1033                               &id, &hwnd, &cmd);
1034
1035                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
1036             }
1037             break;
1038
1039         case WM_GETMINMAXINFO:
1040             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
1041             break;
1042
1043         case WM_MDIACTIVATE:
1044             {
1045                 WXWORD act;
1046                 WXHWND hwndAct, hwndDeact;
1047                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
1048
1049                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
1050             }
1051             // fall through
1052
1053         case WM_MOVE:
1054             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
1055             // scrollbars if necessary
1056
1057             // fall through
1058
1059         case WM_SIZE:
1060             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
1061             // things happen
1062             MSWDefWindowProc(message, wParam, lParam);
1063             break;
1064
1065         case WM_SYSCOMMAND:
1066             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
1067             // the message (the base class version does not)
1068             return MSWDefWindowProc(message, wParam, lParam);
1069
1070         case WM_WINDOWPOSCHANGING:
1071             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
1072             break;
1073     }
1074
1075     if ( !processed )
1076         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
1077
1078     return rc;
1079 }
1080
1081 bool wxMDIChildFrame::HandleCommand(WXWORD id_, WXWORD cmd, WXHWND hwnd)
1082 {
1083     // sign extend to int from short before comparing with the other int ids
1084     int id = (signed short)id_;
1085
1086     // In case it's e.g. a toolbar.
1087     if ( hwnd )
1088     {
1089         wxWindow *win = wxFindWinFromHandle(hwnd);
1090         if (win)
1091             return win->MSWCommand(cmd, id);
1092     }
1093
1094     if (wxCurrentPopupMenu)
1095     {
1096         wxMenu *popupMenu = wxCurrentPopupMenu;
1097         wxCurrentPopupMenu = NULL;
1098         if (popupMenu->MSWCommand(cmd, id))
1099             return true;
1100     }
1101
1102     bool processed;
1103     if (GetMenuBar() && GetMenuBar()->FindItem(id))
1104     {
1105         processed = ProcessCommand(id);
1106     }
1107     else
1108     {
1109         processed = false;
1110     }
1111
1112     return processed;
1113 }
1114
1115 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
1116                                         WXHWND hwndAct,
1117                                         WXHWND hwndDeact)
1118 {
1119     wxMDIParentFrame * const parent = GetMDIParent();
1120
1121     HMENU menuToSet = 0;
1122
1123     bool activated;
1124
1125     if ( m_hWnd == hwndAct )
1126     {
1127         activated = true;
1128         parent->m_currentChild = this;
1129
1130         HMENU child_menu = (HMENU)GetWinMenu();
1131         if ( child_menu )
1132         {
1133             parent->m_parentFrameActive = false;
1134
1135             menuToSet = child_menu;
1136         }
1137     }
1138     else if ( m_hWnd == hwndDeact )
1139     {
1140         wxASSERT_MSG( parent->m_currentChild == this,
1141                       wxT("can't deactivate MDI child which wasn't active!") );
1142
1143         activated = false;
1144         parent->m_currentChild = NULL;
1145
1146         HMENU parent_menu = (HMENU)parent->GetWinMenu();
1147
1148         // activate the the parent menu only when there is no other child
1149         // that has been activated
1150         if ( parent_menu && !hwndAct )
1151         {
1152             parent->m_parentFrameActive = true;
1153
1154             menuToSet = parent_menu;
1155         }
1156     }
1157     else
1158     {
1159         // we have nothing to do with it
1160         return false;
1161     }
1162
1163     if ( menuToSet )
1164     {
1165         MDISetMenu(parent->GetClientWindow(),
1166                    menuToSet, GetMDIWindowMenu(parent));
1167     }
1168
1169     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1170     event.SetEventObject( this );
1171
1172     ResetWindowStyle(NULL);
1173
1174     return HandleWindowEvent(event);
1175 }
1176
1177 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1178 {
1179     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1180
1181     if (!(lpPos->flags & SWP_NOSIZE))
1182     {
1183         RECT rectClient;
1184         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1185         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1186         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1187         {
1188             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1189             lpPos->x = rectClient.left;
1190             lpPos->y = rectClient.top;
1191             lpPos->cx = rectClient.right - rectClient.left;
1192             lpPos->cy = rectClient.bottom - rectClient.top;
1193         }
1194     }
1195
1196     return false;
1197 }
1198
1199 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1200 {
1201     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1202
1203     // let the default window proc calculate the size of MDI children
1204     // frames because it is based on the size of the MDI client window,
1205     // not on the values specified in wxWindow m_max variables
1206     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1207
1208     int minWidth = GetMinWidth(),
1209         minHeight = GetMinHeight();
1210
1211     // but allow GetSizeHints() to set the min size
1212     if ( minWidth != wxDefaultCoord )
1213     {
1214         info->ptMinTrackSize.x = minWidth;
1215
1216         processed = true;
1217     }
1218
1219     if ( minHeight != wxDefaultCoord )
1220     {
1221         info->ptMinTrackSize.y = minHeight;
1222
1223         processed = true;
1224     }
1225
1226     return processed;
1227 }
1228
1229 // ---------------------------------------------------------------------------
1230 // MDI specific message translation/preprocessing
1231 // ---------------------------------------------------------------------------
1232
1233 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1234 {
1235     return DefMDIChildProc(GetHwnd(),
1236                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1237 }
1238
1239 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1240 {
1241     // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
1242     // doesn't do its job correctly for MDI child menus
1243     return MSWDoTranslateMessage(GetMDIParent(), msg);
1244 }
1245
1246 // ---------------------------------------------------------------------------
1247 // misc
1248 // ---------------------------------------------------------------------------
1249
1250 void wxMDIChildFrame::MSWDestroyWindow()
1251 {
1252     wxMDIParentFrame * const parent = GetMDIParent();
1253
1254     // Must make sure this handle is invalidated (set to NULL) since all sorts
1255     // of things could happen after the child client is destroyed, but before
1256     // the wxFrame is destroyed.
1257
1258     HWND oldHandle = (HWND)GetHWND();
1259     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1260                 (WPARAM)oldHandle, 0);
1261
1262     if (parent->GetActiveChild() == NULL)
1263         ResetWindowStyle(NULL);
1264
1265     if (m_hMenu)
1266     {
1267         ::DestroyMenu((HMENU) m_hMenu);
1268         m_hMenu = 0;
1269     }
1270     wxRemoveHandleAssociation(this);
1271     m_hWnd = 0;
1272 }
1273
1274 // Change the client window's extended style so we don't get a client edge
1275 // style when a child is maximised (a double border looks silly.)
1276 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1277 {
1278     RECT *rect = (RECT *)vrect;
1279     wxMDIParentFrame * const pFrameWnd = GetMDIParent();
1280     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1281
1282     if (!pChild || (pChild == this))
1283     {
1284         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1285         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1286
1287         // we want to test whether there is a maximized child, so just set
1288         // dwThisStyle to 0 if there is no child at all
1289         DWORD dwThisStyle = pChild
1290             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1291         DWORD dwNewStyle = dwStyle;
1292         if ( dwThisStyle & WS_MAXIMIZE )
1293             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1294         else
1295             dwNewStyle |= WS_EX_CLIENTEDGE;
1296
1297         if (dwStyle != dwNewStyle)
1298         {
1299             // force update of everything
1300             ::RedrawWindow(hwndClient, NULL, NULL,
1301                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1302             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1303             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1304                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1305                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1306                            SWP_NOCOPYBITS);
1307             if (rect)
1308                 ::GetClientRect(hwndClient, rect);
1309
1310             return true;
1311         }
1312     }
1313
1314     return false;
1315 }
1316
1317 // ===========================================================================
1318 // wxMDIClientWindow: the window of predefined (by Windows) class which
1319 // contains the child frames
1320 // ===========================================================================
1321
1322 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1323 {
1324     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1325
1326     CLIENTCREATESTRUCT ccs;
1327     m_windowStyle = style;
1328     m_parent = parent;
1329
1330     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1331     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1332
1333     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1334                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1335
1336     if ( style & wxHSCROLL )
1337         msStyle |= WS_HSCROLL;
1338     if ( style & wxVSCROLL )
1339         msStyle |= WS_VSCROLL;
1340
1341     DWORD exStyle = WS_EX_CLIENTEDGE;
1342
1343     wxWindowCreationHook hook(this);
1344     m_hWnd = (WXHWND)::CreateWindowEx
1345                        (
1346                         exStyle,
1347                         wxT("MDICLIENT"),
1348                         NULL,
1349                         msStyle,
1350                         0, 0, 0, 0,
1351                         GetWinHwnd(parent),
1352                         NULL,
1353                         wxGetInstance(),
1354                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1355     if ( !m_hWnd )
1356     {
1357         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1358
1359         return false;
1360     }
1361
1362     SubclassWin(m_hWnd);
1363
1364     return true;
1365 }
1366
1367 // Explicitly call default scroll behaviour
1368 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1369 {
1370     // Note: for client windows, the scroll position is not set in
1371     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1372     // scroll position we're at.
1373     // This makes it hard to paint patterns or bitmaps in the background,
1374     // and have the client area scrollable as well.
1375
1376     if ( event.GetOrientation() == wxHORIZONTAL )
1377         m_scrollX = event.GetPosition(); // Always returns zero!
1378     else
1379         m_scrollY = event.GetPosition(); // Always returns zero!
1380
1381     event.Skip();
1382 }
1383
1384 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1385 {
1386     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1387     // client area, you can end up with a non-refreshed portion in the client window
1388     // (see OGL studio sample). So check if the position is changed and if so,
1389     // redraw the MDI child frames.
1390
1391     const wxPoint oldPos = GetPosition();
1392
1393     wxWindow::DoSetSize(x, y, width, height, sizeFlags | wxSIZE_FORCE);
1394
1395     const wxPoint newPos = GetPosition();
1396
1397     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1398     {
1399         if (GetParent())
1400         {
1401             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1402             while (node)
1403             {
1404                 wxWindow *child = node->GetData();
1405                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1406                 {
1407                    ::RedrawWindow(GetHwndOf(child),
1408                                   NULL,
1409                                   NULL,
1410                                   RDW_FRAME |
1411                                   RDW_ALLCHILDREN |
1412                                   RDW_INVALIDATE);
1413                 }
1414                 node = node->GetNext();
1415             }
1416         }
1417     }
1418 }
1419
1420 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1421 {
1422     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1423     // in flicker e.g. when the frame contained controls with non-trivial
1424     // layout. Since 2.5.3, the frame is created hidden as all other top level
1425     // windows. In order to maintain backward compatibility, the frame is shown
1426     // in OnIdle, unless Show(false) was called by the programmer before.
1427     if ( m_needsInitialShow )
1428     {
1429         Show(true);
1430     }
1431
1432     // MDI child frames get their WM_SIZE when they're constructed but at this
1433     // moment they don't have any children yet so all child windows will be
1434     // positioned incorrectly when they are added later - to fix this, we
1435     // generate an artificial size event here
1436     if ( m_needsResize )
1437     {
1438         m_needsResize = false; // avoid any possibility of recursion
1439
1440         SendSizeEvent();
1441     }
1442
1443     event.Skip();
1444 }
1445
1446 // ---------------------------------------------------------------------------
1447 // non member functions
1448 // ---------------------------------------------------------------------------
1449
1450 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1451 {
1452     if ( hmenuFrame || hmenuWindow )
1453     {
1454         if ( !::SendMessage(GetWinHwnd(win),
1455                             WM_MDISETMENU,
1456                             (WPARAM)hmenuFrame,
1457                             (LPARAM)hmenuWindow) )
1458         {
1459 #ifdef __WXDEBUG__
1460             DWORD err = ::GetLastError();
1461             if ( err )
1462                 wxLogApiError(_T("SendMessage(WM_MDISETMENU)"), err);
1463 #endif // __WXDEBUG__
1464         }
1465     }
1466
1467     // update menu bar of the parent window
1468     wxWindow *parent = win->GetParent();
1469     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1470
1471     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1472
1473     ::DrawMenuBar(GetWinHwnd(parent));
1474 }
1475
1476 static void MDIInsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1477 {
1478     // Try to insert Window menu in front of Help, otherwise append it.
1479     HMENU hmenu = (HMENU)menu;
1480
1481     if (subMenu)
1482     {
1483         int N = GetMenuItemCount(hmenu);
1484         bool success = false;
1485         for ( int i = 0; i < N; i++ )
1486         {
1487             wxChar buf[256];
1488             int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1489             if ( chars == 0 )
1490             {
1491                 wxLogLastError(wxT("GetMenuString"));
1492
1493                 continue;
1494             }
1495
1496             wxString strBuf(buf);
1497             if ( wxStripMenuCodes(strBuf) == wxGetStockLabel(wxID_HELP,false) )
1498             {
1499                 success = true;
1500                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1501                              (UINT_PTR)subMenu, _("&Window").wx_str());
1502                 break;
1503             }
1504         }
1505
1506         if ( !success )
1507         {
1508             ::AppendMenu(hmenu, MF_POPUP,
1509                          (UINT_PTR)subMenu, _("&Window").wx_str());
1510         }
1511     }
1512
1513     MDISetMenu(win, hmenu, subMenu);
1514 }
1515
1516 static void MDIRemoveWindowMenu(wxWindow *win, WXHMENU menu)
1517 {
1518     HMENU hMenu = (HMENU)menu;
1519
1520     if ( hMenu )
1521     {
1522         wxChar buf[1024];
1523
1524         int N = ::GetMenuItemCount(hMenu);
1525         for ( int i = 0; i < N; i++ )
1526         {
1527             if ( !::GetMenuString(hMenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1528             {
1529                 // Ignore successful read of menu string with length 0 which
1530                 // occurs, for example, for a maximized MDI childs system menu
1531                 if ( ::GetLastError() != 0 )
1532                 {
1533                     wxLogLastError(wxT("GetMenuString"));
1534                 }
1535
1536                 continue;
1537             }
1538
1539             if ( wxStrcmp(buf, _("&Window")) == 0 )
1540             {
1541                 if ( !::RemoveMenu(hMenu, i, MF_BYPOSITION) )
1542                 {
1543                     wxLogLastError(wxT("RemoveMenu"));
1544                 }
1545
1546                 break;
1547             }
1548         }
1549     }
1550
1551     if ( win )
1552     {
1553         // we don't change the windows menu, but we update the main one
1554         MDISetMenu(win, hMenu, NULL);
1555     }
1556 }
1557
1558 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1559                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1560 {
1561     *activate = true;
1562     *hwndAct = (WXHWND)lParam;
1563     *hwndDeact = (WXHWND)wParam;
1564 }
1565
1566 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)