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