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 and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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 #ifndef WX_PRECOMP
  32     #include "wx/setup.h"
  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     #if wxUSE_STATUSBAR
  39         #include "wx/statusbr.h"
  40     #endif
  41     #include "wx/settings.h"
  42     #include "wx/intl.h"
  43     #include "wx/log.h"
  44 #endif
  45
  46 #include "wx/mdi.h"
  47 #include "wx/msw/private.h"
  48
  49 #if wxUSE_STATUSBAR && wxUSE_NATIVE_STATUSBAR
  50     #include "wx/msw/statbr95.h"
  51 #endif
  52
  53 #if wxUSE_TOOLBAR
  54     #include "wx/toolbar.h"
  55 #endif // wxUSE_TOOLBAR
  56
  57 #include <string.h>
  58
  59 // ---------------------------------------------------------------------------
  60 // global variables
  61 // ---------------------------------------------------------------------------
  62
  63 extern wxWindowList wxModelessWindows;      // from dialog.cpp
  64 extern wxMenu *wxCurrentPopupMenu;
  65
  66 extern const wxChar *wxMDIFrameClassName;   // from app.cpp
  67 extern const wxChar *wxMDIChildFrameClassName;
  68 extern const wxChar *wxMDIChildFrameClassNameNoRedraw;
  69
  70 extern wxWindow *wxWndHook;                 // from window.cpp
  71
  72 extern void wxAssociateWinWithHandle(HWND hWnd, wxWindow *win);
  73 extern void wxRemoveHandleAssociation(wxWindow *win);
  74
  75 static HWND invalidHandle = 0;
  76
  77 // ---------------------------------------------------------------------------
  78 // constants
  79 // ---------------------------------------------------------------------------
  80
  81 static const int IDM_WINDOWTILE  = 4001;
  82 static const int IDM_WINDOWTILEHOR  = 4001;
  83 static const int IDM_WINDOWCASCADE = 4002;
  84 static const int IDM_WINDOWICONS = 4003;
  85 static const int IDM_WINDOWNEXT = 4004;
  86 static const int IDM_WINDOWTILEVERT = 4005;
  87
  88 // This range gives a maximum of 500 MDI children. Should be enough :-)
  89 static const int wxFIRST_MDI_CHILD = 4100;
  90 static const int wxLAST_MDI_CHILD = 4600;
  91
  92 // Status border dimensions
  93 static const int wxTHICK_LINE_BORDER = 3;
  94 static const int wxTHICK_LINE_WIDTH  = 1;
  95
  96 // ---------------------------------------------------------------------------
  97 // private functions
  98 // ---------------------------------------------------------------------------
  99
 100 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
 101 // of the parent of win (which is supposed to be the MDI client window)
 102 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
 103
 104 // insert the window menu (subMenu) into menu just before "Help" submenu or at
 105 // the very end if not found
 106 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
 107
 108 // Remove the window menu
 109 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu);
 110
 111 // is this an id of an MDI child?
 112 inline bool IsMdiCommandId(int id)
 113 {
 114     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
 115 }
 116
 117 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
 118                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
 119
 120 // ===========================================================================
 121 // implementation
 122 // ===========================================================================
 123
 124 // ---------------------------------------------------------------------------
 125 // wxWin macros
 126 // ---------------------------------------------------------------------------
 127
 128 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 129 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 130 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 131
 132 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 133     EVT_SIZE(wxMDIParentFrame::OnSize)
 134     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 135 END_EVENT_TABLE()
 136
 137 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 138     EVT_IDLE(wxMDIChildFrame::OnIdle)
 139 END_EVENT_TABLE()
 140
 141 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 142     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 143 END_EVENT_TABLE()
 144
 145 // ===========================================================================
 146 // wxMDIParentFrame: the frame which contains the client window which manages
 147 // the children
 148 // ===========================================================================
 149
 150 wxMDIParentFrame::wxMDIParentFrame()
 151 {
 152     m_clientWindow = NULL;
 153     m_currentChild = NULL;
 154     m_windowMenu = (wxMenu*) NULL;
 155     m_parentFrameActive = TRUE;
 156 }
 157
 158 bool wxMDIParentFrame::Create(wxWindow *parent,
 159                               wxWindowID id,
 160                               const wxString& title,
 161                               const wxPoint& pos,
 162                               const wxSize& size,
 163                               long style,
 164                               const wxString& name)
 165 {
 166   m_clientWindow = NULL;
 167   m_currentChild = NULL;
 168
 169   // this style can be used to prevent a window from having the standard MDI
 170   // "Window" menu
 171   if ( style & wxFRAME_NO_WINDOW_MENU )
 172   {
 173       m_windowMenu = (wxMenu *)NULL;
 174   }
 175   else // normal case: we have the window menu, so construct it
 176   {
 177       m_windowMenu = new wxMenu;
 178
 179       m_windowMenu->Append(IDM_WINDOWCASCADE, _("&Cascade"));
 180       m_windowMenu->Append(IDM_WINDOWTILEHOR, _("Tile &Horizontally"));
 181       m_windowMenu->Append(IDM_WINDOWTILEVERT, _("Tile &Vertically"));
 182       m_windowMenu->AppendSeparator();
 183       m_windowMenu->Append(IDM_WINDOWICONS, _("&Arrange Icons"));
 184       m_windowMenu->Append(IDM_WINDOWNEXT, _("&Next"));
 185   }
 186
 187   m_parentFrameActive = TRUE;
 188
 189   if (!parent)
 190     wxTopLevelWindows.Append(this);
 191
 192   SetName(name);
 193   m_windowStyle = style;
 194
 195   if (parent) parent->AddChild(this);
 196
 197   if ( id > -1 )
 198     m_windowId = id;
 199   else
 200     m_windowId = (int)NewControlId();
 201
 202   int x = pos.x;
 203   int y = pos.y;
 204   int width = size.x;
 205   int height = size.y;
 206
 207   DWORD msflags = WS_OVERLAPPED;
 208   if (style & wxMINIMIZE_BOX)
 209     msflags |= WS_MINIMIZEBOX;
 210   if (style & wxMAXIMIZE_BOX)
 211     msflags |= WS_MAXIMIZEBOX;
 212   if (style & wxTHICK_FRAME)
 213     msflags |= WS_THICKFRAME;
 214   if (style & wxSYSTEM_MENU)
 215     msflags |= WS_SYSMENU;
 216   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 217     msflags |= WS_MINIMIZE;
 218   if (style & wxMAXIMIZE)
 219     msflags |= WS_MAXIMIZE;
 220   if (style & wxCAPTION)
 221     msflags |= WS_CAPTION;
 222
 223   if (style & wxCLIP_CHILDREN)
 224     msflags |= WS_CLIPCHILDREN;
 225
 226   if ( !wxWindow::MSWCreate(m_windowId,
 227                             parent,
 228                             wxMDIFrameClassName,
 229                             this,
 230                             title,
 231                             x, y, width, height,
 232                             msflags) )
 233   {
 234       return FALSE;
 235   }
 236
 237   wxModelessWindows.Append(this);
 238
 239   // unlike (almost?) all other windows, frames are created hidden
 240   m_isShown = FALSE;
 241
 242   return TRUE;
 243 }
 244
 245 wxMDIParentFrame::~wxMDIParentFrame()
 246 {
 247     DestroyChildren();
 248     // already delete by DestroyChildren()
 249     m_frameToolBar = NULL;
 250     m_frameStatusBar = NULL;
 251
 252     // ::DestroyMenu((HMENU)m_windowMenu);
 253     if (m_windowMenu)
 254     {
 255         delete m_windowMenu;
 256         m_windowMenu = (wxMenu*) NULL;
 257     }
 258
 259     if ( m_clientWindow )
 260     {
 261         if ( m_clientWindow->MSWGetOldWndProc() )
 262             m_clientWindow->UnsubclassWin();
 263
 264         m_clientWindow->SetHWND(0);
 265         delete m_clientWindow;
 266     }
 267 }
 268
 269 #if wxUSE_MENUS_NATIVE
 270
 271 void wxMDIParentFrame::InternalSetMenuBar()
 272 {
 273     m_parentFrameActive = TRUE;
 274
 275     wxMenu *menu = GetWindowMenu();
 276     HMENU subMenu = menu ? GetHmenuOf(menu) : 0;
 277
 278     InsertWindowMenu(GetClientWindow(), m_hMenu, subMenu);
 279 }
 280
 281 #endif // wxUSE_MENUS_NATIVE
 282
 283 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 284 {
 285     if (m_windowMenu)
 286     {
 287         if (GetMenuBar())
 288         {
 289             // Remove old window menu
 290             RemoveWindowMenu(GetClientWindow(), m_hMenu);
 291         }
 292
 293         delete m_windowMenu;
 294         m_windowMenu = (wxMenu*) NULL;
 295     }
 296     if (menu)
 297     {
 298         m_windowMenu = menu;
 299         if (GetMenuBar())
 300         {
 301             InsertWindowMenu(GetClientWindow(), m_hMenu,
 302                              GetHmenuOf(m_windowMenu));
 303         }
 304     }
 305 }
 306
 307 void wxMDIParentFrame::OnSize(wxSizeEvent&)
 308 {
 309     if ( GetClientWindow() )
 310     {
 311         int width, height;
 312         GetClientSize(&width, &height);
 313
 314         GetClientWindow()->SetSize(0, 0, width, height);
 315     }
 316 }
 317
 318 // Returns the active MDI child window
 319 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 320 {
 321     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 322                                     WM_MDIGETACTIVE, 0, 0L);
 323     if ( hWnd == 0 )
 324         return NULL;
 325     else
 326         return (wxMDIChildFrame *)wxFindWinFromHandle((WXHWND) hWnd);
 327 }
 328
 329 // Create the client window class (don't Create the window, just return a new
 330 // class)
 331 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 332 {
 333     return new wxMDIClientWindow;
 334 }
 335
 336 // Responds to colour changes, and passes event on to children.
 337 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 338 {
 339     if ( m_clientWindow )
 340     {
 341         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE));
 342         m_clientWindow->Refresh();
 343     }
 344
 345     event.Skip();
 346 }
 347
 348 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 349 {
 350     return (WXHICON)(wxSTD_MDIPARENTFRAME_ICON ? wxSTD_MDIPARENTFRAME_ICON
 351                                                : wxDEFAULT_MDIPARENTFRAME_ICON);
 352 }
 353
 354 // ---------------------------------------------------------------------------
 355 // MDI operations
 356 // ---------------------------------------------------------------------------
 357
 358 void wxMDIParentFrame::Cascade()
 359 {
 360     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 361 }
 362
 363 // TODO: add a direction argument (hor/vert)
 364 void wxMDIParentFrame::Tile()
 365 {
 366     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
 367 }
 368
 369 void wxMDIParentFrame::ArrangeIcons()
 370 {
 371     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 372 }
 373
 374 void wxMDIParentFrame::ActivateNext()
 375 {
 376     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 377 }
 378
 379 void wxMDIParentFrame::ActivatePrevious()
 380 {
 381     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 382 }
 383
 384 // ---------------------------------------------------------------------------
 385 // the MDI parent frame window proc
 386 // ---------------------------------------------------------------------------
 387
 388 long wxMDIParentFrame::MSWWindowProc(WXUINT message,
 389                                      WXWPARAM wParam,
 390                                      WXLPARAM lParam)
 391 {
 392     long rc = 0;
 393     bool processed = FALSE;
 394
 395     switch ( message )
 396     {
 397         case WM_ACTIVATE:
 398             {
 399                 WXWORD state, minimized;
 400                 WXHWND hwnd;
 401                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 402
 403                 processed = HandleActivate(state, minimized != 0, hwnd);
 404             }
 405             break;
 406
 407         case WM_COMMAND:
 408             {
 409                 WXWORD id, cmd;
 410                 WXHWND hwnd;
 411                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 412
 413                 (void)HandleCommand(id, cmd, hwnd);
 414
 415                 // even if the frame didn't process it, there is no need to try it
 416                 // once again (i.e. call wxFrame::HandleCommand()) - we just dud it,
 417                 // so pretend we processed the message anyhow
 418                 processed = TRUE;
 419             }
 420
 421             // always pass this message DefFrameProc(), otherwise MDI menu
 422             // commands (and sys commands - more surprizingly!) won't work
 423             MSWDefWindowProc(message, wParam, lParam);
 424             break;
 425
 426         case WM_CREATE:
 427             m_clientWindow = OnCreateClient();
 428             // Uses own style for client style
 429             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 430             {
 431                 wxLogMessage(_("Failed to create MDI parent frame."));
 432
 433                 rc = -1;
 434             }
 435
 436             processed = TRUE;
 437             break;
 438
 439         case WM_ERASEBKGND:
 440             processed = TRUE;
 441
 442             // we erase background ourselves
 443             rc = TRUE;
 444             break;
 445
 446         case WM_MENUSELECT:
 447             {
 448                 WXWORD item, flags;
 449                 WXHMENU hmenu;
 450                 UnpackMenuSelect(wParam, lParam, &item, &flags, &hmenu);
 451
 452                 if ( m_parentFrameActive )
 453                 {
 454                     processed = HandleMenuSelect(item, flags, hmenu);
 455                 }
 456                 else if (m_currentChild)
 457                 {
 458                     processed = m_currentChild->
 459                         HandleMenuSelect(item, flags, hmenu);
 460                 }
 461             }
 462             break;
 463
 464         case WM_SIZE:
 465             // as we don't (usually) resize the MDI client to exactly fit the
 466             // client area (we put it below the toolbar, above statusbar &c),
 467             // we should not pass this one to DefFrameProc
 468             break;
 469     }
 470
 471     if ( !processed )
 472         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 473
 474     return rc;
 475 }
 476
 477 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 478 {
 479     bool processed = FALSE;
 480
 481     if ( wxWindow::HandleActivate(state, minimized, activate) )
 482     {
 483         // already processed
 484         processed = TRUE;
 485     }
 486
 487     // If this window is an MDI parent, we must also send an OnActivate message
 488     // to the current child.
 489     if ( (m_currentChild != NULL) &&
 490          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 491     {
 492         wxActivateEvent event(wxEVT_ACTIVATE, TRUE, m_currentChild->GetId());
 493         event.SetEventObject( m_currentChild );
 494         if ( m_currentChild->GetEventHandler()->ProcessEvent(event) )
 495             processed = TRUE;
 496     }
 497
 498     return processed;
 499 }
 500
 501 bool wxMDIParentFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 502 {
 503     // In case it's e.g. a toolbar.
 504     if ( hwnd )
 505     {
 506         wxWindow *win = wxFindWinFromHandle(hwnd);
 507         if ( win )
 508             return win->MSWCommand(cmd, id);
 509     }
 510
 511     // is it one of standard MDI commands?
 512     WXWPARAM wParam = 0;
 513     int msg;
 514     switch ( id )
 515     {
 516         case IDM_WINDOWCASCADE:
 517             msg = WM_MDICASCADE;
 518             wParam = MDITILE_SKIPDISABLED;
 519             break;
 520
 521         case IDM_WINDOWTILEHOR:
 522             wParam |= MDITILE_HORIZONTAL;
 523             // fall through
 524
 525         case IDM_WINDOWTILEVERT:
 526             if ( !wParam )
 527                 wParam = MDITILE_VERTICAL;
 528             msg = WM_MDITILE;
 529             wParam |= MDITILE_SKIPDISABLED;
 530             break;
 531
 532         case IDM_WINDOWICONS:
 533             msg = WM_MDIICONARRANGE;
 534             break;
 535
 536         case IDM_WINDOWNEXT:
 537             msg = WM_MDINEXT;
 538             break;
 539
 540         default:
 541             msg = 0;
 542     }
 543
 544     if ( msg )
 545     {
 546         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, 0);
 547
 548         return TRUE;
 549     }
 550
 551     // FIXME VZ: what does this test do??
 552     if (id >= 0xF000)
 553     {
 554         return FALSE; // Get WndProc to call default proc
 555     }
 556
 557     if ( IsMdiCommandId(id) )
 558     {
 559         wxWindowList::Node* node = GetChildren().GetFirst();
 560         while ( node )
 561         {
 562             wxWindow* child = node->GetData();
 563             if ( child->GetHWND() )
 564             {
 565                 long childId = wxGetWindowId(child->GetHWND());
 566                 if (childId == (long)id)
 567                 {
 568                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 569                                    WM_MDIACTIVATE,
 570                                    (WPARAM)child->GetHWND(), 0);
 571                     return TRUE;
 572                 }
 573             }
 574             node = node->GetNext();
 575         }
 576     }
 577     else if ( m_parentFrameActive )
 578     {
 579         return ProcessCommand(id);
 580     }
 581     else if ( m_currentChild )
 582     {
 583         return m_currentChild->HandleCommand(id, cmd, hwnd);
 584     }
 585     else
 586     {
 587         // this shouldn't happen because it means that our messages are being
 588         // lost (they're not sent to the parent frame nor to the children)
 589         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 590     }
 591
 592     return FALSE;
 593 }
 594
 595 long wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 596                                         WXWPARAM wParam,
 597                                         WXLPARAM lParam)
 598 {
 599     WXHWND clientWnd;
 600     if ( GetClientWindow() )
 601         clientWnd = GetClientWindow()->GetHWND();
 602     else
 603         clientWnd = 0;
 604
 605     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 606 }
 607
 608 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 609 {
 610     MSG *pMsg = (MSG *)msg;
 611
 612     // first let the current child get it
 613     if ( m_currentChild && m_currentChild->GetHWND() &&
 614          m_currentChild->MSWTranslateMessage(msg) )
 615     {
 616         return TRUE;
 617     }
 618
 619     // then try out accel table (will also check the menu accels)
 620     if ( wxFrame::MSWTranslateMessage(msg) )
 621     {
 622         return TRUE;
 623     }
 624
 625     // finally, check for MDI specific built in accel keys
 626     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 627     {
 628         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 629             return TRUE;
 630     }
 631
 632     return FALSE;
 633 }
 634
 635 // ===========================================================================
 636 // wxMDIChildFrame
 637 // ===========================================================================
 638
 639 void wxMDIChildFrame::Init()
 640 {
 641     m_needsResize = TRUE;
 642 }
 643
 644 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 645                              wxWindowID id,
 646                              const wxString& title,
 647                              const wxPoint& pos,
 648                              const wxSize& size,
 649                              long style,
 650                              const wxString& name)
 651 {
 652   SetName(name);
 653   wxWindowBase::Show(TRUE); // MDI child frame starts off shown
 654
 655   if ( id > -1 )
 656     m_windowId = id;
 657   else
 658     m_windowId = (int)NewControlId();
 659
 660   if ( parent )
 661   {
 662       parent->AddChild(this);
 663   }
 664
 665   wxWndHook = this;
 666
 667   int x = pos.x;
 668   int y = pos.y;
 669   int width = size.x;
 670   int height = size.y;
 671
 672   MDICREATESTRUCT mcs;
 673
 674   mcs.szClass = style & wxNO_FULL_REPAINT_ON_RESIZE
 675                     ? wxMDIChildFrameClassNameNoRedraw
 676                     : wxMDIChildFrameClassName;
 677   mcs.szTitle = title;
 678   mcs.hOwner = wxGetInstance();
 679   if (x > -1)
 680       mcs.x = x;
 681   else
 682       mcs.x = CW_USEDEFAULT;
 683
 684   if (y > -1)
 685       mcs.y = y;
 686   else
 687       mcs.y = CW_USEDEFAULT;
 688
 689   if (width > -1)
 690       mcs.cx = width;
 691   else
 692       mcs.cx = CW_USEDEFAULT;
 693
 694   if (height > -1)
 695       mcs.cy = height;
 696   else
 697       mcs.cy = CW_USEDEFAULT;
 698
 699   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN | WS_THICKFRAME | WS_VISIBLE ;
 700   if (style & wxMINIMIZE_BOX)
 701     msflags |= WS_MINIMIZEBOX;
 702   if (style & wxMAXIMIZE_BOX)
 703     msflags |= WS_MAXIMIZEBOX;
 704   if (style & wxTHICK_FRAME)
 705     msflags |= WS_THICKFRAME;
 706   if (style & wxSYSTEM_MENU)
 707     msflags |= WS_SYSMENU;
 708   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 709     msflags |= WS_MINIMIZE;
 710   if (style & wxMAXIMIZE)
 711     msflags |= WS_MAXIMIZE;
 712   if (style & wxCAPTION)
 713     msflags |= WS_CAPTION;
 714
 715   mcs.style = msflags;
 716
 717   mcs.lParam = 0;
 718
 719   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 720                                  WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 721
 722   wxWndHook = NULL;
 723   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 724
 725   // VZ: what's this? an act of piracy?
 726   //SetWindowLong(GetHwnd(), 0, (long)this);
 727
 728   wxModelessWindows.Append(this);
 729
 730   return TRUE;
 731 }
 732
 733 wxMDIChildFrame::~wxMDIChildFrame()
 734 {
 735     DestroyChildren();
 736
 737     // already delete by DestroyChildren()
 738     m_frameToolBar = NULL;
 739     m_frameStatusBar = NULL;
 740
 741     MSWDestroyWindow();
 742 }
 743
 744 // Set the client size (i.e. leave the calculation of borders etc.
 745 // to wxWindows)
 746 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 747 {
 748   HWND hWnd = GetHwnd();
 749
 750   RECT rect;
 751   ::GetClientRect(hWnd, &rect);
 752
 753   RECT rect2;
 754   GetWindowRect(hWnd, &rect2);
 755
 756   // Find the difference between the entire window (title bar and all)
 757   // and the client area; add this to the new client size to move the
 758   // window
 759   int actual_width = rect2.right - rect2.left - rect.right + width;
 760   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 761
 762   if (GetStatusBar() && GetStatusBar()->IsShown())
 763   {
 764     int sx, sy;
 765     GetStatusBar()->GetSize(&sx, &sy);
 766     actual_height += sy;
 767   }
 768
 769   POINT point;
 770   point.x = rect2.left;
 771   point.y = rect2.top;
 772
 773   // If there's an MDI parent, must subtract the parent's top left corner
 774   // since MoveWindow moves relative to the parent
 775   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 776   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 777
 778   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 779
 780   wxSizeEvent event(wxSize(width, height), m_windowId);
 781   event.SetEventObject( this );
 782   GetEventHandler()->ProcessEvent(event);
 783 }
 784
 785 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 786 {
 787   RECT rect;
 788   GetWindowRect(GetHwnd(), &rect);
 789   POINT point;
 790   point.x = rect.left;
 791   point.y = rect.top;
 792
 793   // Since we now have the absolute screen coords,
 794   // if there's a parent we must subtract its top left corner
 795   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 796   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 797
 798   *x = point.x;
 799   *y = point.y;
 800 }
 801
 802 void wxMDIChildFrame::InternalSetMenuBar()
 803 {
 804     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 805
 806     // HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 807     HMENU subMenu = (HMENU) 0;
 808     if (parent->GetWindowMenu())
 809         subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 810
 811     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 812
 813     parent->m_parentFrameActive = FALSE;
 814 }
 815
 816 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 817 {
 818     return (WXHICON)(wxSTD_MDICHILDFRAME_ICON ? wxSTD_MDICHILDFRAME_ICON
 819                                               : wxDEFAULT_MDICHILDFRAME_ICON);
 820 }
 821
 822 // ---------------------------------------------------------------------------
 823 // MDI operations
 824 // ---------------------------------------------------------------------------
 825
 826 void wxMDIChildFrame::Maximize(bool maximize)
 827 {
 828     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 829     if ( parent && parent->GetClientWindow() )
 830     {
 831         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 832                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 833                       (WPARAM)GetHwnd(), 0);
 834     }
 835 }
 836
 837 void wxMDIChildFrame::Restore()
 838 {
 839     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 840     if ( parent && parent->GetClientWindow() )
 841     {
 842         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 843                       (WPARAM) GetHwnd(), 0);
 844     }
 845 }
 846
 847 void wxMDIChildFrame::Activate()
 848 {
 849     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 850     if ( parent && parent->GetClientWindow() )
 851     {
 852         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 853                       (WPARAM) GetHwnd(), 0);
 854     }
 855 }
 856
 857 // ---------------------------------------------------------------------------
 858 // MDI window proc and message handlers
 859 // ---------------------------------------------------------------------------
 860
 861 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 862                                     WXWPARAM wParam,
 863                                     WXLPARAM lParam)
 864 {
 865     long rc = 0;
 866     bool processed = FALSE;
 867
 868     switch ( message )
 869     {
 870         case WM_COMMAND:
 871             {
 872                 WORD id, cmd;
 873                 WXHWND hwnd;
 874                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 875                               &id, &hwnd, &cmd);
 876
 877                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 878             }
 879             break;
 880
 881         case WM_GETMINMAXINFO:
 882             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
 883             break;
 884
 885         case WM_MDIACTIVATE:
 886             {
 887                 WXWORD act;
 888                 WXHWND hwndAct, hwndDeact;
 889                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 890
 891                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 892             }
 893             // fall through
 894
 895         case WM_MOVE:
 896             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 897             // scrollbars if necessary
 898
 899             // fall through
 900
 901         case WM_SIZE:
 902             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 903             // things happen
 904             MSWDefWindowProc(message, wParam, lParam);
 905             break;
 906
 907         case WM_SYSCOMMAND:
 908             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 909             // the message (the base class version does not)
 910             return MSWDefWindowProc(message, wParam, lParam);
 911
 912         case WM_WINDOWPOSCHANGING:
 913             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 914             break;
 915     }
 916
 917     if ( !processed )
 918         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 919
 920     return rc;
 921 }
 922
 923 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 924 {
 925     // In case it's e.g. a toolbar.
 926     if ( hwnd )
 927     {
 928         wxWindow *win = wxFindWinFromHandle(hwnd);
 929         if (win)
 930             return win->MSWCommand(cmd, id);
 931     }
 932
 933     if (wxCurrentPopupMenu)
 934     {
 935         wxMenu *popupMenu = wxCurrentPopupMenu;
 936         wxCurrentPopupMenu = NULL;
 937         if (popupMenu->MSWCommand(cmd, id))
 938             return TRUE;
 939     }
 940
 941     bool processed;
 942     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 943     {
 944         processed = ProcessCommand(id);
 945     }
 946     else
 947     {
 948         processed = FALSE;
 949     }
 950
 951     return processed;
 952 }
 953
 954 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 955                                         WXHWND hwndAct,
 956                                         WXHWND hwndDeact)
 957 {
 958     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 959
 960     HMENU menuToSet = 0;
 961
 962     bool activated;
 963
 964     if ( m_hWnd == hwndAct )
 965     {
 966         activated = TRUE;
 967         parent->m_currentChild = this;
 968
 969         HMENU child_menu = (HMENU)GetWinMenu();
 970         if ( child_menu )
 971         {
 972             parent->m_parentFrameActive = FALSE;
 973
 974             menuToSet = child_menu;
 975         }
 976     }
 977     else if ( m_hWnd == hwndDeact )
 978     {
 979         wxASSERT_MSG( parent->m_currentChild == this,
 980                       wxT("can't deactivate MDI child which wasn't active!") );
 981
 982         activated = FALSE;
 983         parent->m_currentChild = NULL;
 984
 985         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 986
 987         // activate the the parent menu only when there is no other child
 988         // that has been activated
 989         if ( parent_menu && !hwndAct )
 990         {
 991             parent->m_parentFrameActive = TRUE;
 992
 993             menuToSet = parent_menu;
 994         }
 995     }
 996     else
 997     {
 998         // we have nothing to do with it
 999         return FALSE;
1000     }
1001
1002     if ( menuToSet )
1003     {
1004         HMENU subMenu = (HMENU) 0;
1005         if (parent->GetWindowMenu())
1006             subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
1007
1008         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
1009     }
1010
1011     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1012     event.SetEventObject( this );
1013
1014     ResetWindowStyle((void *)NULL);
1015
1016     return GetEventHandler()->ProcessEvent(event);
1017 }
1018
1019 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1020 {
1021     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1022 #if defined(__WIN95__)
1023     if (!(lpPos->flags & SWP_NOSIZE))
1024     {
1025         RECT rectClient;
1026         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1027         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1028         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1029         {
1030             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
1031             lpPos->x = rectClient.left;
1032             lpPos->y = rectClient.top;
1033             lpPos->cx = rectClient.right - rectClient.left;
1034             lpPos->cy = rectClient.bottom - rectClient.top;
1035         }
1036         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1037         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1038         {
1039             pFrameWnd->GetToolBar()->Refresh();
1040         }
1041     }
1042 #endif // Win95
1043
1044     return FALSE;
1045 }
1046
1047 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1048 {
1049     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1050
1051     // let the default window proc calculate the size of MDI children
1052     // frames because it is based on the size of the MDI client window,
1053     // not on the values specified in wxWindow m_max variables
1054     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1055
1056     // but allow GetSizeHints() to set the min size
1057     if ( m_minWidth != -1 )
1058     {
1059         info->ptMinTrackSize.x = m_minWidth;
1060
1061         processed = TRUE;
1062     }
1063
1064     if ( m_minHeight != -1 )
1065     {
1066         info->ptMinTrackSize.y = m_minHeight;
1067
1068         processed = TRUE;
1069     }
1070
1071     return TRUE;
1072 }
1073
1074 // ---------------------------------------------------------------------------
1075 // MDI specific message translation/preprocessing
1076 // ---------------------------------------------------------------------------
1077
1078 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
1079 {
1080     return DefMDIChildProc(GetHwnd(),
1081                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1082 }
1083
1084 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1085 {
1086     return wxFrame::MSWTranslateMessage(msg);
1087 }
1088
1089 // ---------------------------------------------------------------------------
1090 // misc
1091 // ---------------------------------------------------------------------------
1092
1093 void wxMDIChildFrame::MSWDestroyWindow()
1094 {
1095     MSWDetachWindowMenu();
1096     invalidHandle = GetHwnd();
1097
1098     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1099
1100     // Must make sure this handle is invalidated (set to NULL) since all sorts
1101     // of things could happen after the child client is destroyed, but before
1102     // the wxFrame is destroyed.
1103
1104     HWND oldHandle = (HWND)GetHWND();
1105     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1106                 (WPARAM)oldHandle, 0);
1107
1108     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1109         ResetWindowStyle((void*) NULL);
1110
1111     invalidHandle = 0;
1112
1113     if (m_hMenu)
1114     {
1115         ::DestroyMenu((HMENU) m_hMenu);
1116         m_hMenu = 0;
1117     }
1118     wxRemoveHandleAssociation(this);
1119     m_hWnd = 0;
1120 }
1121
1122 // Change the client window's extended style so we don't get a client edge
1123 // style when a child is maximised (a double border looks silly.)
1124 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1125 {
1126 #if defined(__WIN95__)
1127     RECT *rect = (RECT *)vrect;
1128     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1129     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1130     if (!pChild || (pChild == this))
1131     {
1132         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1133         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1134
1135         // we want to test whether there is a maximized child, so just set
1136         // dwThisStyle to 0 if there is no child at all
1137         DWORD dwThisStyle = pChild
1138             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1139         DWORD dwNewStyle = dwStyle;
1140         if ( dwThisStyle & WS_MAXIMIZE )
1141             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1142         else
1143             dwNewStyle |= WS_EX_CLIENTEDGE;
1144
1145         if (dwStyle != dwNewStyle)
1146         {
1147             // force update of everything
1148             ::RedrawWindow(hwndClient, NULL, NULL,
1149                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1150             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1151             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1152                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1153                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1154                            SWP_NOCOPYBITS);
1155             if (rect)
1156                 ::GetClientRect(hwndClient, rect);
1157
1158             return TRUE;
1159         }
1160     }
1161 #endif // Win95
1162
1163     return FALSE;
1164 }
1165
1166 // ===========================================================================
1167 // wxMDIClientWindow: the window of predefined (by Windows) class which
1168 // contains the child frames
1169 // ===========================================================================
1170
1171 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1172 {
1173     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1174
1175     CLIENTCREATESTRUCT ccs;
1176     m_windowStyle = style;
1177     m_parent = parent;
1178
1179     ccs.hWindowMenu = (HMENU) 0;
1180     if (parent->GetWindowMenu())
1181         ccs.hWindowMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
1182     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1183
1184     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1185                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1186
1187     if ( style & wxHSCROLL )
1188         msStyle |= WS_HSCROLL;
1189     if ( style & wxVSCROLL )
1190         msStyle |= WS_VSCROLL;
1191
1192 #if defined(__WIN95__)
1193     DWORD exStyle = WS_EX_CLIENTEDGE;
1194 #else
1195     DWORD exStyle = 0;
1196 #endif
1197
1198     wxWndHook = this;
1199     m_hWnd = (WXHWND)::CreateWindowEx
1200                        (
1201                         exStyle,
1202                         wxT("MDICLIENT"),
1203                         NULL,
1204                         msStyle,
1205                         0, 0, 0, 0,
1206                         GetWinHwnd(parent),
1207                         NULL,
1208                         wxGetInstance(),
1209                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1210     if ( !m_hWnd )
1211     {
1212         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1213
1214         return FALSE;
1215     }
1216
1217     SubclassWin(m_hWnd);
1218     wxWndHook = NULL;
1219
1220     return TRUE;
1221 }
1222
1223 // Explicitly call default scroll behaviour
1224 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1225 {
1226     // Note: for client windows, the scroll position is not set in
1227     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1228     // scroll position we're at.
1229     // This makes it hard to paint patterns or bitmaps in the background,
1230     // and have the client area scrollable as well.
1231
1232     if ( event.GetOrientation() == wxHORIZONTAL )
1233         m_scrollX = event.GetPosition(); // Always returns zero!
1234     else
1235         m_scrollY = event.GetPosition(); // Always returns zero!
1236
1237     event.Skip();
1238 }
1239
1240 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1241 {
1242     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1243     // client area, you can end up with a non-refreshed portion in the client window
1244     // (see OGL studio sample). So check if the position is changed and if so,
1245     // redraw the MDI child frames.
1246
1247     wxPoint oldPos = GetPosition();
1248
1249     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1250
1251     wxPoint newPos = GetPosition();
1252
1253     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1254     {
1255         if (GetParent())
1256         {
1257             wxNode* node = GetParent()->GetChildren().First();
1258             while (node)
1259             {
1260                 wxWindow* child = (wxWindow*) node->Data();
1261                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1262                 {
1263                     HWND hWnd = (HWND) child->GetHWND();
1264                    ::RedrawWindow(hWnd, NULL, NULL, RDW_FRAME|RDW_ALLCHILDREN|RDW_INVALIDATE );
1265                 }
1266                 node = node->Next();
1267             }
1268         }
1269     }
1270 }
1271
1272 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1273 {
1274     // MDI child frames get their WM_SIZE when they're constructed but at this
1275     // moment they don't have any children yet so all child windows will be
1276     // positioned incorrectly when they are added later - to fix this, we
1277     // generate an artificial size event here
1278     if ( m_needsResize )
1279     {
1280         m_needsResize = FALSE; // avoid any possibility of recursion
1281
1282         SendSizeEvent();
1283     }
1284
1285     event.Skip();
1286 }
1287
1288 // ---------------------------------------------------------------------------
1289 // non member functions
1290 // ---------------------------------------------------------------------------
1291
1292 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1293 {
1294     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1295 #ifdef __WIN32__
1296                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow
1297 #else
1298                   0, MAKELPARAM(hmenuFrame, hmenuWindow)
1299 #endif
1300                  );
1301
1302     // update menu bar of the parent window
1303     wxWindow *parent = win->GetParent();
1304     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1305
1306 #ifndef __WIN16__
1307     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1308 #endif
1309
1310     ::DrawMenuBar(GetWinHwnd(parent));
1311 }
1312
1313 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1314 {
1315     // Try to insert Window menu in front of Help, otherwise append it.
1316     HMENU hmenu = (HMENU)menu;
1317
1318     if (subMenu)
1319     {
1320     int N = GetMenuItemCount(hmenu);
1321     bool success = FALSE;
1322     for ( int i = 0; i < N; i++ )
1323     {
1324         wxChar buf[256];
1325         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1326         if ( chars == 0 )
1327         {
1328             wxLogLastError(wxT("GetMenuString"));
1329
1330             continue;
1331         }
1332
1333         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1334         {
1335             success = TRUE;
1336             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1337                          (UINT)subMenu, _("&Window"));
1338             break;
1339         }
1340     }
1341
1342     if ( !success )
1343     {
1344         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1345     }
1346     }
1347
1348     MDISetMenu(win, hmenu, subMenu);
1349 }
1350
1351 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1352 {
1353     // Try to insert Window menu in front of Help, otherwise append it.
1354     HMENU hmenu = (HMENU)menu;
1355     int N = GetMenuItemCount(hmenu);
1356     for ( int i = 0; i < N; i++ )
1357     {
1358         wxChar buf[256];
1359         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1360         if ( chars == 0 )
1361         {
1362             wxLogLastError(wxT("GetMenuString"));
1363
1364             continue;
1365         }
1366
1367         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Window")) )
1368         {
1369             ::RemoveMenu(hmenu, i, MF_BYPOSITION);
1370             break;
1371         }
1372     }
1373
1374     // Does passing 0 for the window menu really work with WM_MDISETMENU?
1375     MDISetMenu(win, hmenu, 0);
1376 }
1377
1378 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1379                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1380 {
1381 #ifdef __WIN32__
1382     *activate = TRUE;
1383     *hwndAct = (WXHWND)lParam;
1384     *hwndDeact = (WXHWND)wParam;
1385 #else // Win16
1386     *activate = (WXWORD)wParam;
1387     *hwndAct = (WXHWND)LOWORD(lParam);
1388     *hwndDeact = (WXHWND)HIWORD(lParam);
1389 #endif // Win32/Win16
1390 }