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