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