src/msw/mdi.cpp

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