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