src/msw/mdi.cpp

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