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