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