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