src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/mdi.cpp
   3 // Purpose:     MDI classes for wxMSW
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "mdi.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_MDI && !defined(__WXUNIVERSAL__)
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/setup.h"
  35     #include "wx/frame.h"
  36     #include "wx/menu.h"
  37     #include "wx/app.h"
  38     #include "wx/utils.h"
  39     #include "wx/dialog.h"
  40     #if wxUSE_STATUSBAR
  41         #include "wx/statusbr.h"
  42     #endif
  43     #include "wx/settings.h"
  44     #include "wx/intl.h"
  45     #include "wx/log.h"
  46 #endif
  47
  48 #include "wx/mdi.h"
  49 #include "wx/msw/private.h"
  50
  51 #if wxUSE_STATUSBAR && wxUSE_NATIVE_STATUSBAR
  52     #include "wx/msw/statbr95.h"
  53 #endif
  54
  55 #if wxUSE_TOOLBAR
  56     #include "wx/toolbar.h"
  57 #endif // wxUSE_TOOLBAR
  58
  59 #include <string.h>
  60
  61 // ---------------------------------------------------------------------------
  62 // global variables
  63 // ---------------------------------------------------------------------------
  64
  65 extern wxMenu *wxCurrentPopupMenu;
  66
  67 extern const wxChar *wxMDIFrameClassName;   // from app.cpp
  68 extern const wxChar *wxMDIChildFrameClassName;
  69 extern const wxChar *wxMDIChildFrameClassNameNoRedraw;
  70 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  71 extern void wxRemoveHandleAssociation(wxWindow *win);
  72
  73 static HWND invalidHandle = 0;
  74
  75 // ---------------------------------------------------------------------------
  76 // constants
  77 // ---------------------------------------------------------------------------
  78
  79 static const int IDM_WINDOWTILEHOR  = 4001;
  80 static const int IDM_WINDOWCASCADE = 4002;
  81 static const int IDM_WINDOWICONS = 4003;
  82 static const int IDM_WINDOWNEXT = 4004;
  83 static const int IDM_WINDOWTILEVERT = 4005;
  84 static const int IDM_WINDOWPREV = 4006;
  85
  86 // This range gives a maximum of 500 MDI children. Should be enough :-)
  87 static const int wxFIRST_MDI_CHILD = 4100;
  88 static const int wxLAST_MDI_CHILD = 4600;
  89
  90 // ---------------------------------------------------------------------------
  91 // private functions
  92 // ---------------------------------------------------------------------------
  93
  94 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  95 // of the parent of win (which is supposed to be the MDI client window)
  96 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
  97
  98 // insert the window menu (subMenu) into menu just before "Help" submenu or at
  99 // the very end if not found
 100 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 101
 102 // Remove the window menu
 103 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu);
 104
 105 // is this an id of an MDI child?
 106 inline bool IsMdiCommandId(int id)
 107 {
 108     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 109 }
 110
 111 // unpack the parameters of WM_MDIACTIVATE message
 112 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 113                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 114
 115 // return the HMENU of the MDI menu
 116 static inline HMENU GetMDIWindowMenu(wxMDIParentFrame *frame)
 117 {
 118     wxMenu *menu = frame->GetWindowMenu();
 119     return menu ? GetHmenuOf(menu) : 0;
 120 }
 121
 122 // ===========================================================================
 123 // implementation
 124 // ===========================================================================
 125
 126 // ---------------------------------------------------------------------------
 127 // wxWin macros
 128 // ---------------------------------------------------------------------------
 129
 130 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 131 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 132 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 133
 134 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 135     EVT_SIZE(wxMDIParentFrame::OnSize)
 136     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 137 END_EVENT_TABLE()
 138
 139 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 140     EVT_IDLE(wxMDIChildFrame::OnIdle)
 141 END_EVENT_TABLE()
 142
 143 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 144     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 145 END_EVENT_TABLE()
 146
 147 // ===========================================================================
 148 // wxMDIParentFrame: the frame which contains the client window which manages
 149 // the children
 150 // ===========================================================================
 151
 152 wxMDIParentFrame::wxMDIParentFrame()
 153 {
 154     m_clientWindow = NULL;
 155     m_currentChild = NULL;
 156     m_windowMenu = (wxMenu*) NULL;
 157     m_parentFrameActive = true;
 158 }
 159
 160 bool wxMDIParentFrame::Create(wxWindow *parent,
 161                               wxWindowID id,
 162                               const wxString& title,
 163                               const wxPoint& pos,
 164                               const wxSize& size,
 165                               long style,
 166                               const wxString& name)
 167 {
 168   m_clientWindow = NULL;
 169   m_currentChild = NULL;
 170
 171   // this style can be used to prevent a window from having the standard MDI
 172   // "Window" menu
 173   if ( style & wxFRAME_NO_WINDOW_MENU )
 174   {
 175       m_windowMenu = (wxMenu *)NULL;
 176   }
 177   else // normal case: we have the window menu, so construct it
 178   {
 179       m_windowMenu = new wxMenu;
 180
 181       m_windowMenu->Append(IDM_WINDOWCASCADE, _("&Cascade"));
 182       m_windowMenu->Append(IDM_WINDOWTILEHOR, _("Tile &Horizontally"));
 183       m_windowMenu->Append(IDM_WINDOWTILEVERT, _("Tile &Vertically"));
 184       m_windowMenu->AppendSeparator();
 185       m_windowMenu->Append(IDM_WINDOWICONS, _("&Arrange Icons"));
 186       m_windowMenu->Append(IDM_WINDOWNEXT, _("&Next"));
 187       m_windowMenu->Append(IDM_WINDOWPREV, _("&Previous"));
 188   }
 189
 190   m_parentFrameActive = true;
 191
 192   if (!parent)
 193     wxTopLevelWindows.Append(this);
 194
 195   SetName(name);
 196   m_windowStyle = style;
 197
 198   if ( parent )
 199       parent->AddChild(this);
 200
 201   if ( id != wxID_ANY )
 202     m_windowId = id;
 203   else
 204     m_windowId = NewControlId();
 205
 206   WXDWORD exflags;
 207   WXDWORD msflags = MSWGetCreateWindowFlags(&exflags);
 208   msflags &= ~WS_VSCROLL;
 209   msflags &= ~WS_HSCROLL;
 210
 211   if ( !wxWindow::MSWCreate(wxMDIFrameClassName,
 212                             title,
 213                             pos, size,
 214                             msflags,
 215                             exflags) )
 216   {
 217       return false;
 218   }
 219
 220   // unlike (almost?) all other windows, frames are created hidden
 221   m_isShown = false;
 222
 223   return true;
 224 }
 225
 226 wxMDIParentFrame::~wxMDIParentFrame()
 227 {
 228     // see comment in ~wxMDIChildFrame
 229 #if wxUSE_TOOLBAR
 230     m_frameToolBar = NULL;
 231 #endif
 232 #if wxUSE_STATUSBAR
 233     m_frameStatusBar = NULL;
 234 #endif // wxUSE_STATUSBAR
 235
 236     DestroyChildren();
 237
 238     if (m_windowMenu)
 239     {
 240         delete m_windowMenu;
 241         m_windowMenu = (wxMenu*) NULL;
 242     }
 243
 244     // the MDI frame menubar is not automatically deleted by Windows unlike for
 245     // the normal frames
 246     if ( m_hMenu )
 247     {
 248         ::DestroyMenu((HMENU)m_hMenu);
 249         m_hMenu = (WXHMENU)NULL;
 250     }
 251
 252     if ( m_clientWindow )
 253     {
 254         if ( m_clientWindow->MSWGetOldWndProc() )
 255             m_clientWindow->UnsubclassWin();
 256
 257         m_clientWindow->SetHWND(0);
 258         delete m_clientWindow;
 259     }
 260 }
 261
 262 #if wxUSE_MENUS_NATIVE
 263
 264 void wxMDIParentFrame::InternalSetMenuBar()
 265 {
 266     m_parentFrameActive = true;
 267
 268     InsertWindowMenu(GetClientWindow(), m_hMenu, GetMDIWindowMenu(this));
 269 }
 270
 271 #endif // wxUSE_MENUS_NATIVE
 272
 273 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 274 {
 275     if (m_windowMenu)
 276     {
 277         if (GetMenuBar())
 278         {
 279             // Remove old window menu
 280             RemoveWindowMenu(GetClientWindow(), m_hMenu);
 281         }
 282
 283         delete m_windowMenu;
 284         m_windowMenu = (wxMenu*) NULL;
 285     }
 286
 287     if (menu)
 288     {
 289         m_windowMenu = menu;
 290         if (GetMenuBar())
 291         {
 292             InsertWindowMenu(GetClientWindow(), m_hMenu,
 293                              GetHmenuOf(m_windowMenu));
 294         }
 295     }
 296 }
 297
 298 void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
 299 {
 300     wxMDIChildFrame *child = GetActiveChild();
 301     if ( child )
 302     {
 303         wxEvtHandler* source = child->GetEventHandler();
 304         wxMenuBar* bar = child->GetMenuBar();
 305
 306         if (menu)
 307         {
 308             menu->UpdateUI(source);
 309         }
 310         else
 311         {
 312             if ( bar != NULL )
 313             {
 314                 int nCount = bar->GetMenuCount();
 315                 for (int n = 0; n < nCount; n++)
 316                     bar->GetMenu(n)->UpdateUI(source);
 317             }
 318         }
 319     }
 320     else
 321     {
 322         wxFrameBase::DoMenuUpdates(menu);
 323     }
 324 }
 325
 326 void wxMDIParentFrame::OnSize(wxSizeEvent&)
 327 {
 328     if ( GetClientWindow() )
 329     {
 330         int width, height;
 331         GetClientSize(&width, &height);
 332
 333         GetClientWindow()->SetSize(0, 0, width, height);
 334     }
 335 }
 336
 337 // Returns the active MDI child window
 338 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 339 {
 340     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 341                                     WM_MDIGETACTIVE, 0, 0L);
 342     if ( hWnd == 0 )
 343         return NULL;
 344     else
 345         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 346 }
 347
 348 // Create the client window class (don't Create the window, just return a new
 349 // class)
 350 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 351 {
 352     return new wxMDIClientWindow;
 353 }
 354
 355 // Responds to colour changes, and passes event on to children.
 356 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 357 {
 358     if ( m_clientWindow )
 359     {
 360         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 361         m_clientWindow->Refresh();
 362     }
 363
 364     event.Skip();
 365 }
 366
 367 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 368 {
 369     // we don't have any standard icons (any more)
 370     return (WXHICON)0;
 371 }
 372
 373 // ---------------------------------------------------------------------------
 374 // MDI operations
 375 // ---------------------------------------------------------------------------
 376
 377 void wxMDIParentFrame::Cascade()
 378 {
 379     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 380 }
 381
 382 void wxMDIParentFrame::Tile(wxOrientation orient)
 383 {
 384     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 385                   _T("invalid orientation value") );
 386
 387     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 388                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 389                                          : MDITILE_VERTICAL, 0);
 390 }
 391
 392 void wxMDIParentFrame::ArrangeIcons()
 393 {
 394     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 395 }
 396
 397 void wxMDIParentFrame::ActivateNext()
 398 {
 399     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 400 }
 401
 402 void wxMDIParentFrame::ActivatePrevious()
 403 {
 404     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 405 }
 406
 407 // ---------------------------------------------------------------------------
 408 // the MDI parent frame window proc
 409 // ---------------------------------------------------------------------------
 410
 411 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 412                                      WXWPARAM wParam,
 413                                      WXLPARAM lParam)
 414 {
 415     WXLRESULT rc = 0;
 416     bool processed = false;
 417
 418     switch ( message )
 419     {
 420         case WM_ACTIVATE:
 421             {
 422                 WXWORD state, minimized;
 423                 WXHWND hwnd;
 424                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 425
 426                 processed = HandleActivate(state, minimized != 0, hwnd);
 427             }
 428             break;
 429
 430         case WM_COMMAND:
 431             {
 432                 WXWORD id, cmd;
 433                 WXHWND hwnd;
 434                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 435
 436                 (void)HandleCommand(id, cmd, hwnd);
 437
 438                 // even if the frame didn't process it, there is no need to try it
 439                 // once again (i.e. call wxFrame::HandleCommand()) - we just did it,
 440                 // so pretend we processed the message anyhow
 441                 processed = true;
 442             }
 443
 444             // always pass this message DefFrameProc(), otherwise MDI menu
 445             // commands (and sys commands - more surprisingly!) won't work
 446             MSWDefWindowProc(message, wParam, lParam);
 447             break;
 448
 449         case WM_CREATE:
 450             m_clientWindow = OnCreateClient();
 451             // Uses own style for client style
 452             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 453             {
 454                 wxLogMessage(_("Failed to create MDI parent frame."));
 455
 456                 rc = -1;
 457             }
 458
 459             processed = true;
 460             break;
 461
 462         case WM_ERASEBKGND:
 463             processed = true;
 464
 465             // we erase background ourselves
 466             rc = true;
 467             break;
 468
 469         case WM_MENUSELECT:
 470             {
 471                 WXWORD item, flags;
 472                 WXHMENU hmenu;
 473                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 474
 475                 if ( m_parentFrameActive )
 476                 {
 477                     processed = HandleMenuSelect(item, flags, hmenu);
 478                 }
 479                 else if (m_currentChild)
 480                 {
 481                     processed = m_currentChild->
 482                         HandleMenuSelect(item, flags, hmenu);
 483                 }
 484             }
 485             break;
 486
 487         case WM_SIZE:
 488             // though we don't (usually) resize the MDI client to exactly fit the
 489             // client area we need to pass this one to DefFrameProc to allow the children to show
 490             break;
 491     }
 492
 493     if ( !processed )
 494         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 495
 496     return rc;
 497 }
 498
 499 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 500 {
 501     bool processed = false;
 502
 503     if ( wxWindow::HandleActivate(state, minimized, activate) )
 504     {
 505         // already processed
 506         processed = true;
 507     }
 508
 509     // If this window is an MDI parent, we must also send an OnActivate message
 510     // to the current child.
 511     if ( (m_currentChild != NULL) &&
 512          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 513     {
 514         wxActivateEvent event(wxEVT_ACTIVATE, true, m_currentChild->GetId());
 515         event.SetEventObject( m_currentChild );
 516         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 517             processed = true;
 518     }
 519
 520     return processed;
 521 }
 522
 523 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 524 {
 525     // In case it's e.g. a toolbar.
 526     if ( hwnd )
 527     {
 528         wxWindow *win = wxFindWinFromHandle(hwnd);
 529         if ( win )
 530             return win->MSWCommand(cmd, id);
 531     }
 532
 533     // is it one of standard MDI commands?
 534     WXWPARAM wParam = 0;
 535     WXLPARAM lParam = 0;
 536     int msg;
 537     switch ( id )
 538     {
 539         case IDM_WINDOWCASCADE:
 540             msg = WM_MDICASCADE;
 541             wParam = MDITILE_SKIPDISABLED;
 542             break;
 543
 544         case IDM_WINDOWTILEHOR:
 545             wParam |= MDITILE_HORIZONTAL;
 546             // fall through
 547
 548         case IDM_WINDOWTILEVERT:
 549             if ( !wParam )
 550                 wParam = MDITILE_VERTICAL;
 551             msg = WM_MDITILE;
 552             wParam |= MDITILE_SKIPDISABLED;
 553             break;
 554
 555         case IDM_WINDOWICONS:
 556             msg = WM_MDIICONARRANGE;
 557             break;
 558
 559         case IDM_WINDOWNEXT:
 560             msg = WM_MDINEXT;
 561             lParam = 0;         // next child
 562             break;
 563
 564         case IDM_WINDOWPREV:
 565             msg = WM_MDINEXT;
 566             lParam = 1;         // previous child
 567             break;
 568
 569         default:
 570             msg = 0;
 571     }
 572
 573     if ( msg )
 574     {
 575         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 576
 577         return true;
 578     }
 579
 580     // FIXME VZ: what does this test do??
 581     if (id >= 0xF000)
 582     {
 583         return false; // Get WndProc to call default proc
 584     }
 585
 586     if ( IsMdiCommandId(id) )
 587     {
 588         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 589         while ( node )
 590         {
 591             wxWindow *child = node->GetData();
 592             if ( child->GetHWND() )
 593             {
 594                 long childId = wxGetWindowId(child->GetHWND());
 595                 if (childId == (long)id)
 596                 {
 597                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 598                                    WM_MDIACTIVATE,
 599                                    (WPARAM)child->GetHWND(), 0);
 600                     return true;
 601                 }
 602             }
 603             node = node->GetNext();
 604         }
 605     }
 606     else if ( m_parentFrameActive )
 607     {
 608         return ProcessCommand(id);
 609     }
 610     else if ( m_currentChild )
 611     {
 612         return m_currentChild->HandleCommand(id, cmd, hwnd);
 613     }
 614     else
 615     {
 616         // this shouldn't happen because it means that our messages are being
 617         // lost (they're not sent to the parent frame nor to the children)
 618         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 619     }
 620
 621     return false;
 622 }
 623
 624 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 625                                         WXWPARAM wParam,
 626                                         WXLPARAM lParam)
 627 {
 628     WXHWND clientWnd;
 629     if ( GetClientWindow() )
 630         clientWnd = GetClientWindow()->GetHWND();
 631     else
 632         clientWnd = 0;
 633
 634     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 635 }
 636
 637 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 638 {
 639     MSG *pMsg = (MSG *)msg;
 640
 641     // first let the current child get it
 642     if ( m_currentChild && m_currentChild->GetHWND() &&
 643          m_currentChild->MSWTranslateMessage(msg) )
 644     {
 645         return true;
 646     }
 647
 648     // then try out accel table (will also check the menu accels)
 649     if ( wxFrame::MSWTranslateMessage(msg) )
 650     {
 651         return true;
 652     }
 653
 654     // finally, check for MDI specific built in accel keys
 655     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 656     {
 657         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 658             return true;
 659     }
 660
 661     return false;
 662 }
 663
 664 // ===========================================================================
 665 // wxMDIChildFrame
 666 // ===========================================================================
 667
 668 void wxMDIChildFrame::Init()
 669 {
 670     m_needsResize = true;
 671     m_needsInitialShow = true;
 672 }
 673
 674 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 675                              wxWindowID id,
 676                              const wxString& title,
 677                              const wxPoint& pos,
 678                              const wxSize& size,
 679                              long style,
 680                              const wxString& name)
 681 {
 682   SetName(name);
 683
 684   if ( id != wxID_ANY )
 685     m_windowId = id;
 686   else
 687     m_windowId = (int)NewControlId();
 688
 689   if ( parent )
 690   {
 691       parent->AddChild(this);
 692   }
 693
 694   int x = pos.x;
 695   int y = pos.y;
 696   int width = size.x;
 697   int height = size.y;
 698
 699   MDICREATESTRUCT mcs;
 700
 701   mcs.szClass = style & wxFULL_REPAINT_ON_RESIZE
 702                     ? wxMDIChildFrameClassName
 703                     : wxMDIChildFrameClassNameNoRedraw;
 704   mcs.szTitle = title;
 705   mcs.hOwner = wxGetInstance();
 706   if (x != wxDefaultCoord)
 707       mcs.x = x;
 708   else
 709       mcs.x = CW_USEDEFAULT;
 710
 711   if (y != wxDefaultCoord)
 712       mcs.y = y;
 713   else
 714       mcs.y = CW_USEDEFAULT;
 715
 716   if (width != wxDefaultCoord)
 717       mcs.cx = width;
 718   else
 719       mcs.cx = CW_USEDEFAULT;
 720
 721   if (height != wxDefaultCoord)
 722       mcs.cy = height;
 723   else
 724       mcs.cy = CW_USEDEFAULT;
 725
 726   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 727   if (style & wxMINIMIZE_BOX)
 728     msflags |= WS_MINIMIZEBOX;
 729   if (style & wxMAXIMIZE_BOX)
 730     msflags |= WS_MAXIMIZEBOX;
 731   if (style & wxTHICK_FRAME)
 732     msflags |= WS_THICKFRAME;
 733   if (style & wxSYSTEM_MENU)
 734     msflags |= WS_SYSMENU;
 735   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 736     msflags |= WS_MINIMIZE;
 737   if (style & wxMAXIMIZE)
 738     msflags |= WS_MAXIMIZE;
 739   if (style & wxCAPTION)
 740     msflags |= WS_CAPTION;
 741
 742   mcs.style = msflags;
 743
 744   mcs.lParam = 0;
 745
 746   wxWindowCreationHook hook(this);
 747
 748   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 749                                  WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 750
 751   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 752
 753   return true;
 754 }
 755
 756 wxMDIChildFrame::~wxMDIChildFrame()
 757 {
 758     // will be destroyed by DestroyChildren() but reset them before calling it
 759     // to avoid using dangling pointers if a callback comes in the meanwhile
 760 #if wxUSE_TOOLBAR
 761     m_frameToolBar = NULL;
 762 #endif
 763 #if wxUSE_STATUSBAR
 764     m_frameStatusBar = NULL;
 765 #endif // wxUSE_STATUSBAR
 766
 767     DestroyChildren();
 768
 769     RemoveWindowMenu(NULL, m_hMenu);
 770
 771     MSWDestroyWindow();
 772 }
 773
 774 bool wxMDIChildFrame::Show(bool show)
 775 {
 776     m_needsInitialShow = false;
 777     return wxFrame::Show(show);
 778 }
 779
 780 // Set the client size (i.e. leave the calculation of borders etc.
 781 // to wxWidgets)
 782 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 783 {
 784   HWND hWnd = GetHwnd();
 785
 786   RECT rect;
 787   ::GetClientRect(hWnd, &rect);
 788
 789   RECT rect2;
 790   GetWindowRect(hWnd, &rect2);
 791
 792   // Find the difference between the entire window (title bar and all)
 793   // and the client area; add this to the new client size to move the
 794   // window
 795   int actual_width = rect2.right - rect2.left - rect.right + width;
 796   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 797
 798 #if wxUSE_STATUSBAR
 799   if (GetStatusBar() && GetStatusBar()->IsShown())
 800   {
 801     int sx, sy;
 802     GetStatusBar()->GetSize(&sx, &sy);
 803     actual_height += sy;
 804   }
 805 #endif // wxUSE_STATUSBAR
 806
 807   POINT point;
 808   point.x = rect2.left;
 809   point.y = rect2.top;
 810
 811   // If there's an MDI parent, must subtract the parent's top left corner
 812   // since MoveWindow moves relative to the parent
 813   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 814   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 815
 816   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 817
 818   wxSize size(width, height);
 819   wxSizeEvent event(size, m_windowId);
 820   event.SetEventObject( this );
 821   GetEventHandler()->ProcessEvent(event);
 822 }
 823
 824 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 825 {
 826   RECT rect;
 827   GetWindowRect(GetHwnd(), &rect);
 828   POINT point;
 829   point.x = rect.left;
 830   point.y = rect.top;
 831
 832   // Since we now have the absolute screen coords,
 833   // if there's a parent we must subtract its top left corner
 834   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 835   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 836
 837   if (x)
 838       *x = point.x;
 839   if (y)
 840       *y = point.y;
 841 }
 842
 843 void wxMDIChildFrame::InternalSetMenuBar()
 844 {
 845     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 846
 847     InsertWindowMenu(parent->GetClientWindow(),
 848                      m_hMenu, GetMDIWindowMenu(parent));
 849
 850     parent->m_parentFrameActive = false;
 851 }
 852
 853 void wxMDIChildFrame::DetachMenuBar()
 854 {
 855         RemoveWindowMenu(NULL, m_hMenu);
 856         wxFrame::DetachMenuBar();
 857 }
 858
 859 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 860 {
 861     // we don't have any standard icons (any more)
 862     return (WXHICON)0;
 863 }
 864
 865 // ---------------------------------------------------------------------------
 866 // MDI operations
 867 // ---------------------------------------------------------------------------
 868
 869 void wxMDIChildFrame::Maximize(bool maximize)
 870 {
 871     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 872     if ( parent && parent->GetClientWindow() )
 873     {
 874         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 875                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 876                       (WPARAM)GetHwnd(), 0);
 877     }
 878 }
 879
 880 void wxMDIChildFrame::Restore()
 881 {
 882     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 883     if ( parent && parent->GetClientWindow() )
 884     {
 885         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 886                       (WPARAM) GetHwnd(), 0);
 887     }
 888 }
 889
 890 void wxMDIChildFrame::Activate()
 891 {
 892     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 893     if ( parent && parent->GetClientWindow() )
 894     {
 895         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 896                       (WPARAM) GetHwnd(), 0);
 897     }
 898 }
 899
 900 // ---------------------------------------------------------------------------
 901 // MDI window proc and message handlers
 902 // ---------------------------------------------------------------------------
 903
 904 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
 905                                     WXWPARAM wParam,
 906                                     WXLPARAM lParam)
 907 {
 908     WXLRESULT rc = 0;
 909     bool processed = false;
 910
 911     switch ( message )
 912     {
 913         case WM_COMMAND:
 914             {
 915                 WORD id, cmd;
 916                 WXHWND hwnd;
 917                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 918                               &id, &hwnd, &cmd);
 919
 920                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 921             }
 922             break;
 923
 924         case WM_GETMINMAXINFO:
 925             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
 926             break;
 927
 928         case WM_MDIACTIVATE:
 929             {
 930                 WXWORD act;
 931                 WXHWND hwndAct, hwndDeact;
 932                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 933
 934                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 935             }
 936             // fall through
 937
 938         case WM_MOVE:
 939             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 940             // scrollbars if necessary
 941
 942             // fall through
 943
 944         case WM_SIZE:
 945             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 946             // things happen
 947             MSWDefWindowProc(message, wParam, lParam);
 948             break;
 949
 950         case WM_SYSCOMMAND:
 951             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 952             // the message (the base class version does not)
 953             return MSWDefWindowProc(message, wParam, lParam);
 954
 955         case WM_WINDOWPOSCHANGING:
 956             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 957             break;
 958     }
 959
 960     if ( !processed )
 961         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 962
 963     return rc;
 964 }
 965
 966 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 967 {
 968     // In case it's e.g. a toolbar.
 969     if ( hwnd )
 970     {
 971         wxWindow *win = wxFindWinFromHandle(hwnd);
 972         if (win)
 973             return win->MSWCommand(cmd, id);
 974     }
 975
 976     if (wxCurrentPopupMenu)
 977     {
 978         wxMenu *popupMenu = wxCurrentPopupMenu;
 979         wxCurrentPopupMenu = NULL;
 980         if (popupMenu->MSWCommand(cmd, id))
 981             return true;
 982     }
 983
 984     bool processed;
 985     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 986     {
 987         processed = ProcessCommand(id);
 988     }
 989     else
 990     {
 991         processed = false;
 992     }
 993
 994     return processed;
 995 }
 996
 997 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 998                                         WXHWND hwndAct,
 999                                         WXHWND hwndDeact)
1000 {
1001     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1002
1003     HMENU menuToSet = 0;
1004
1005     bool activated;
1006
1007     if ( m_hWnd == hwndAct )
1008     {
1009         activated = true;
1010         parent->m_currentChild = this;
1011
1012         HMENU child_menu = (HMENU)GetWinMenu();
1013         if ( child_menu )
1014         {
1015             parent->m_parentFrameActive = false;
1016
1017             menuToSet = child_menu;
1018         }
1019     }
1020     else if ( m_hWnd == hwndDeact )
1021     {
1022         wxASSERT_MSG( parent->m_currentChild == this,
1023                       wxT("can't deactivate MDI child which wasn't active!") );
1024
1025         activated = false;
1026         parent->m_currentChild = NULL;
1027
1028         HMENU parent_menu = (HMENU)parent->GetWinMenu();
1029
1030         // activate the the parent menu only when there is no other child
1031         // that has been activated
1032         if ( parent_menu && !hwndAct )
1033         {
1034             parent->m_parentFrameActive = true;
1035
1036             menuToSet = parent_menu;
1037         }
1038     }
1039     else
1040     {
1041         // we have nothing to do with it
1042         return false;
1043     }
1044
1045     if ( menuToSet )
1046     {
1047         MDISetMenu(parent->GetClientWindow(),
1048                    menuToSet, GetMDIWindowMenu(parent));
1049     }
1050
1051     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1052     event.SetEventObject( this );
1053
1054     ResetWindowStyle((void *)NULL);
1055
1056     return GetEventHandler()->ProcessEvent(event);
1057 }
1058
1059 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1060 {
1061     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1062 #if defined(__WIN95__)
1063     if (!(lpPos->flags & SWP_NOSIZE))
1064     {
1065         RECT rectClient;
1066         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1067         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1068         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1069         {
1070             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1071             lpPos->x = rectClient.left;
1072             lpPos->y = rectClient.top;
1073             lpPos->cx = rectClient.right - rectClient.left;
1074             lpPos->cy = rectClient.bottom - rectClient.top;
1075         }
1076 #if wxUSE_TOOLBAR
1077         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1078         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1079         {
1080             pFrameWnd->GetToolBar()->Refresh();
1081         }
1082 #endif
1083     }
1084 #endif // Win95
1085
1086     return false;
1087 }
1088
1089 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1090 {
1091     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1092
1093     // let the default window proc calculate the size of MDI children
1094     // frames because it is based on the size of the MDI client window,
1095     // not on the values specified in wxWindow m_max variables
1096     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1097
1098     int minWidth = GetMinWidth(),
1099         minHeight = GetMinHeight();
1100
1101     // but allow GetSizeHints() to set the min size
1102     if ( minWidth != -1 )
1103     {
1104         info->ptMinTrackSize.x = minWidth;
1105
1106         processed = true;
1107     }
1108
1109     if ( minHeight != -1 )
1110     {
1111         info->ptMinTrackSize.y = minHeight;
1112
1113         processed = true;
1114     }
1115
1116     return processed;
1117 }
1118
1119 // ---------------------------------------------------------------------------
1120 // MDI specific message translation/preprocessing
1121 // ---------------------------------------------------------------------------
1122
1123 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1124 {
1125     return DefMDIChildProc(GetHwnd(),
1126                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1127 }
1128
1129 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1130 {
1131     return wxFrame::MSWTranslateMessage(msg);
1132 }
1133
1134 // ---------------------------------------------------------------------------
1135 // misc
1136 // ---------------------------------------------------------------------------
1137
1138 void wxMDIChildFrame::MSWDestroyWindow()
1139 {
1140     invalidHandle = GetHwnd();
1141
1142     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1143
1144     // Must make sure this handle is invalidated (set to NULL) since all sorts
1145     // of things could happen after the child client is destroyed, but before
1146     // the wxFrame is destroyed.
1147
1148     HWND oldHandle = (HWND)GetHWND();
1149     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1150                 (WPARAM)oldHandle, 0);
1151
1152     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1153         ResetWindowStyle((void*) NULL);
1154
1155     invalidHandle = 0;
1156
1157     if (m_hMenu)
1158     {
1159         ::DestroyMenu((HMENU) m_hMenu);
1160         m_hMenu = 0;
1161     }
1162     wxRemoveHandleAssociation(this);
1163     m_hWnd = 0;
1164 }
1165
1166 // Change the client window's extended style so we don't get a client edge
1167 // style when a child is maximised (a double border looks silly.)
1168 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1169 {
1170 #if defined(__WIN95__)
1171     RECT *rect = (RECT *)vrect;
1172     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1173     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1174     if (!pChild || (pChild == this))
1175     {
1176         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1177         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1178
1179         // we want to test whether there is a maximized child, so just set
1180         // dwThisStyle to 0 if there is no child at all
1181         DWORD dwThisStyle = pChild
1182             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1183         DWORD dwNewStyle = dwStyle;
1184         if ( dwThisStyle & WS_MAXIMIZE )
1185             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1186         else
1187             dwNewStyle |= WS_EX_CLIENTEDGE;
1188
1189         if (dwStyle != dwNewStyle)
1190         {
1191             // force update of everything
1192             ::RedrawWindow(hwndClient, NULL, NULL,
1193                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1194             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1195             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1196                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1197                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1198                            SWP_NOCOPYBITS);
1199             if (rect)
1200                 ::GetClientRect(hwndClient, rect);
1201
1202             return true;
1203         }
1204     }
1205 #endif // Win95
1206
1207     return false;
1208 }
1209
1210 // ===========================================================================
1211 // wxMDIClientWindow: the window of predefined (by Windows) class which
1212 // contains the child frames
1213 // ===========================================================================
1214
1215 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1216 {
1217     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1218
1219     CLIENTCREATESTRUCT ccs;
1220     m_windowStyle = style;
1221     m_parent = parent;
1222
1223     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1224     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1225
1226     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1227                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1228
1229     if ( style & wxHSCROLL )
1230         msStyle |= WS_HSCROLL;
1231     if ( style & wxVSCROLL )
1232         msStyle |= WS_VSCROLL;
1233
1234 #if defined(__WIN95__)
1235     DWORD exStyle = WS_EX_CLIENTEDGE;
1236 #else
1237     DWORD exStyle = 0;
1238 #endif
1239
1240     wxWindowCreationHook hook(this);
1241     m_hWnd = (WXHWND)::CreateWindowEx
1242                        (
1243                         exStyle,
1244                         wxT("MDICLIENT"),
1245                         NULL,
1246                         msStyle,
1247                         0, 0, 0, 0,
1248                         GetWinHwnd(parent),
1249                         NULL,
1250                         wxGetInstance(),
1251                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1252     if ( !m_hWnd )
1253     {
1254         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1255
1256         return false;
1257     }
1258
1259     SubclassWin(m_hWnd);
1260
1261     return true;
1262 }
1263
1264 // Explicitly call default scroll behaviour
1265 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1266 {
1267     // Note: for client windows, the scroll position is not set in
1268     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1269     // scroll position we're at.
1270     // This makes it hard to paint patterns or bitmaps in the background,
1271     // and have the client area scrollable as well.
1272
1273     if ( event.GetOrientation() == wxHORIZONTAL )
1274         m_scrollX = event.GetPosition(); // Always returns zero!
1275     else
1276         m_scrollY = event.GetPosition(); // Always returns zero!
1277
1278     event.Skip();
1279 }
1280
1281 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1282 {
1283     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1284     // client area, you can end up with a non-refreshed portion in the client window
1285     // (see OGL studio sample). So check if the position is changed and if so,
1286     // redraw the MDI child frames.
1287
1288     wxPoint oldPos = GetPosition();
1289
1290     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1291
1292     wxPoint newPos = GetPosition();
1293
1294     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1295     {
1296         if (GetParent())
1297         {
1298             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1299             while (node)
1300             {
1301                 wxWindow *child = node->GetData();
1302                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1303                 {
1304                    ::RedrawWindow(GetHwndOf(child),
1305                                   NULL,
1306                                   NULL,
1307                                   RDW_FRAME |
1308                                   RDW_ALLCHILDREN |
1309                                   RDW_INVALIDATE);
1310                 }
1311                 node = node->GetNext();
1312             }
1313         }
1314     }
1315 }
1316
1317 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1318 {
1319     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1320     // in flicker e.g. when the frame contained controls with non-trivial
1321     // layout. Since 2.5.3, the frame is created hidden as all other top level
1322     // windows. In order to maintain backward compatibility, the frame is shown
1323     // in OnIdle, unless Show(false) was called by the programmer before.
1324     if ( m_needsInitialShow )
1325     {
1326         Show(true);
1327     }
1328
1329     // MDI child frames get their WM_SIZE when they're constructed but at this
1330     // moment they don't have any children yet so all child windows will be
1331     // positioned incorrectly when they are added later - to fix this, we
1332     // generate an artificial size event here
1333     if ( m_needsResize )
1334     {
1335         m_needsResize = false; // avoid any possibility of recursion
1336
1337         SendSizeEvent();
1338     }
1339
1340     event.Skip();
1341 }
1342
1343 // ---------------------------------------------------------------------------
1344 // non member functions
1345 // ---------------------------------------------------------------------------
1346
1347 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1348 {
1349     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1350 #ifdef __WIN32__
1351                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow
1352 #else
1353                   0, MAKELPARAM(hmenuFrame, hmenuWindow)
1354 #endif
1355                  );
1356
1357     // update menu bar of the parent window
1358     wxWindow *parent = win->GetParent();
1359     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1360
1361     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1362
1363     ::DrawMenuBar(GetWinHwnd(parent));
1364 }
1365
1366 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1367 {
1368     // Try to insert Window menu in front of Help, otherwise append it.
1369     HMENU hmenu = (HMENU)menu;
1370
1371     if (subMenu)
1372     {
1373         int N = GetMenuItemCount(hmenu);
1374         bool success = false;
1375         for ( int i = 0; i < N; i++ )
1376         {
1377             wxChar buf[256];
1378             int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1379             if ( chars == 0 )
1380             {
1381                 wxLogLastError(wxT("GetMenuString"));
1382
1383                 continue;
1384             }
1385
1386
1387             if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1388             {
1389                 success = true;
1390                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1391                              (UINT)subMenu, _("&Window"));
1392                 break;
1393             }
1394         }
1395
1396         if ( !success )
1397         {
1398             ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1399         }
1400     }
1401
1402     MDISetMenu(win, hmenu, subMenu);
1403 }
1404
1405 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1406 {
1407     HMENU hMenu = (HMENU)menu;
1408
1409     if ( hMenu )
1410     {
1411         wxChar buf[1024];
1412
1413         int N = ::GetMenuItemCount(hMenu);
1414         for ( int i = 0; i < N; i++ )
1415         {
1416             if ( !::GetMenuString(hMenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1417             {
1418                 // Ignore successful read of menu string with length 0 which
1419                 // occurs, for example, for a maximized MDI childs system menu
1420                 if ( ::GetLastError() != 0 )
1421                 {
1422                     wxLogLastError(wxT("GetMenuString"));
1423                 }
1424
1425                 continue;
1426             }
1427
1428             if ( wxStrcmp(buf, _("&Window")) == 0 )
1429             {
1430                 if ( !::RemoveMenu(hMenu, i, MF_BYPOSITION) )
1431                 {
1432                     wxLogLastError(wxT("RemoveMenu"));
1433                 }
1434
1435                 break;
1436             }
1437         }
1438     }
1439
1440     if ( win )
1441     {
1442         // we don't change the windows menu, but we update the main one
1443         MDISetMenu(win, hMenu, NULL);
1444     }
1445 }
1446
1447 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1448                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1449 {
1450     *activate = true;
1451     *hwndAct = (WXHWND)lParam;
1452     *hwndDeact = (WXHWND)wParam;
1453 }
1454
1455 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)
1456