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
 654   if ( id > -1 )
 655     m_windowId = id;
 656   else
 657     m_windowId = (int)NewControlId();
 658
 659   if ( parent )
 660   {
 661       parent->AddChild(this);
 662   }
 663
 664   wxWndHook = this;
 665
 666   int x = pos.x;
 667   int y = pos.y;
 668   int width = size.x;
 669   int height = size.y;
 670
 671   MDICREATESTRUCT mcs;
 672
 673   mcs.szClass = style & wxNO_FULL_REPAINT_ON_RESIZE
 674                     ? wxMDIChildFrameClassNameNoRedraw
 675                     : wxMDIChildFrameClassName;
 676   mcs.szTitle = title;
 677   mcs.hOwner = wxGetInstance();
 678   if (x > -1)
 679       mcs.x = x;
 680   else
 681       mcs.x = CW_USEDEFAULT;
 682
 683   if (y > -1)
 684       mcs.y = y;
 685   else
 686       mcs.y = CW_USEDEFAULT;
 687
 688   if (width > -1)
 689       mcs.cx = width;
 690   else
 691       mcs.cx = CW_USEDEFAULT;
 692
 693   if (height > -1)
 694       mcs.cy = height;
 695   else
 696       mcs.cy = CW_USEDEFAULT;
 697
 698   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN | WS_THICKFRAME;
 699   if (style & wxMINIMIZE_BOX)
 700     msflags |= WS_MINIMIZEBOX;
 701   if (style & wxMAXIMIZE_BOX)
 702     msflags |= WS_MAXIMIZEBOX;
 703   if (style & wxTHICK_FRAME)
 704     msflags |= WS_THICKFRAME;
 705   if (style & wxSYSTEM_MENU)
 706     msflags |= WS_SYSMENU;
 707   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 708     msflags |= WS_MINIMIZE;
 709   if (style & wxMAXIMIZE)
 710     msflags |= WS_MAXIMIZE;
 711   if (style & wxCAPTION)
 712     msflags |= WS_CAPTION;
 713
 714   mcs.style = msflags;
 715
 716   mcs.lParam = 0;
 717
 718   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 719                                  WM_MDICREATE, 0, (LONG)(LPSTR)&mcs);
 720
 721   wxWndHook = NULL;
 722   wxAssociateWinWithHandle((HWND) GetHWND(), this);
 723
 724   // VZ: what's this? an act of piracy?
 725   //SetWindowLong(GetHwnd(), 0, (long)this);
 726
 727   wxModelessWindows.Append(this);
 728
 729   return TRUE;
 730 }
 731
 732 wxMDIChildFrame::~wxMDIChildFrame()
 733 {
 734     DestroyChildren();
 735
 736     // already delete by DestroyChildren()
 737     m_frameToolBar = NULL;
 738     m_frameStatusBar = NULL;
 739
 740     MSWDestroyWindow();
 741 }
 742
 743 // Set the client size (i.e. leave the calculation of borders etc.
 744 // to wxWindows)
 745 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 746 {
 747   HWND hWnd = GetHwnd();
 748
 749   RECT rect;
 750   ::GetClientRect(hWnd, &rect);
 751
 752   RECT rect2;
 753   GetWindowRect(hWnd, &rect2);
 754
 755   // Find the difference between the entire window (title bar and all)
 756   // and the client area; add this to the new client size to move the
 757   // window
 758   int actual_width = rect2.right - rect2.left - rect.right + width;
 759   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 760
 761   if (GetStatusBar() && GetStatusBar()->IsShown())
 762   {
 763     int sx, sy;
 764     GetStatusBar()->GetSize(&sx, &sy);
 765     actual_height += sy;
 766   }
 767
 768   POINT point;
 769   point.x = rect2.left;
 770   point.y = rect2.top;
 771
 772   // If there's an MDI parent, must subtract the parent's top left corner
 773   // since MoveWindow moves relative to the parent
 774   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 775   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 776
 777   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)TRUE);
 778
 779   wxSizeEvent event(wxSize(width, height), m_windowId);
 780   event.SetEventObject( this );
 781   GetEventHandler()->ProcessEvent(event);
 782 }
 783
 784 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 785 {
 786   RECT rect;
 787   GetWindowRect(GetHwnd(), &rect);
 788   POINT point;
 789   point.x = rect.left;
 790   point.y = rect.top;
 791
 792   // Since we now have the absolute screen coords,
 793   // if there's a parent we must subtract its top left corner
 794   wxMDIParentFrame *mdiParent = (wxMDIParentFrame *)GetParent();
 795   ::ScreenToClient((HWND) mdiParent->GetClientWindow()->GetHWND(), &point);
 796
 797   *x = point.x;
 798   *y = point.y;
 799 }
 800
 801 void wxMDIChildFrame::InternalSetMenuBar()
 802 {
 803     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 804
 805     // HMENU subMenu = GetSubMenu((HMENU)parent->GetWindowMenu(), 0);
 806     HMENU subMenu = (HMENU) 0;
 807     if (parent->GetWindowMenu())
 808         subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 809
 810     InsertWindowMenu(parent->GetClientWindow(), m_hMenu, subMenu);
 811
 812     parent->m_parentFrameActive = FALSE;
 813 }
 814
 815 // ---------------------------------------------------------------------------
 816 // MDI operations
 817 // ---------------------------------------------------------------------------
 818
 819 void wxMDIChildFrame::Maximize(bool maximize)
 820 {
 821     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 822     if ( parent && parent->GetClientWindow() )
 823     {
 824         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 825                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
 826                       (WPARAM)GetHwnd(), 0);
 827     }
 828 }
 829
 830 void wxMDIChildFrame::Restore()
 831 {
 832     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 833     if ( parent && parent->GetClientWindow() )
 834     {
 835         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
 836                       (WPARAM) GetHwnd(), 0);
 837     }
 838 }
 839
 840 void wxMDIChildFrame::Activate()
 841 {
 842     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 843     if ( parent && parent->GetClientWindow() )
 844     {
 845         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
 846                       (WPARAM) GetHwnd(), 0);
 847     }
 848 }
 849
 850 // ---------------------------------------------------------------------------
 851 // MDI window proc and message handlers
 852 // ---------------------------------------------------------------------------
 853
 854 long wxMDIChildFrame::MSWWindowProc(WXUINT message,
 855                                     WXWPARAM wParam,
 856                                     WXLPARAM lParam)
 857 {
 858     long rc = 0;
 859     bool processed = FALSE;
 860
 861     switch ( message )
 862     {
 863         case WM_COMMAND:
 864             {
 865                 WORD id, cmd;
 866                 WXHWND hwnd;
 867                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
 868                               &id, &hwnd, &cmd);
 869
 870                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
 871             }
 872             break;
 873
 874         case WM_GETMINMAXINFO:
 875             // let the default window proc calculate the size of MDI children
 876             // frames because it is based on the size of the MDI client window,
 877             // not on the values specified in wxWindow m_min/max variables
 878             return MSWDefWindowProc(message, wParam, lParam);
 879
 880         case WM_MDIACTIVATE:
 881             {
 882                 WXWORD act;
 883                 WXHWND hwndAct, hwndDeact;
 884                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
 885
 886                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
 887             }
 888             // fall through
 889
 890         case WM_MOVE:
 891             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
 892             // scrollbars if necessary
 893
 894             // fall through
 895
 896         case WM_SIZE:
 897             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
 898             // things happen
 899             MSWDefWindowProc(message, wParam, lParam);
 900             break;
 901
 902         case WM_SYSCOMMAND:
 903             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
 904             // the message (the base class version does not)
 905             return MSWDefWindowProc(message, wParam, lParam);
 906
 907         case WM_WINDOWPOSCHANGING:
 908             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
 909             break;
 910     }
 911
 912     if ( !processed )
 913         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 914
 915     return rc;
 916 }
 917
 918 bool wxMDIChildFrame::HandleCommand(WXWORD id, WXWORD cmd, WXHWND hwnd)
 919 {
 920     // In case it's e.g. a toolbar.
 921     if ( hwnd )
 922     {
 923         wxWindow *win = wxFindWinFromHandle(hwnd);
 924         if (win)
 925             return win->MSWCommand(cmd, id);
 926     }
 927
 928     if (wxCurrentPopupMenu)
 929     {
 930         wxMenu *popupMenu = wxCurrentPopupMenu;
 931         wxCurrentPopupMenu = NULL;
 932         if (popupMenu->MSWCommand(cmd, id))
 933             return TRUE;
 934     }
 935
 936     bool processed;
 937     if (GetMenuBar() && GetMenuBar()->FindItem(id))
 938     {
 939         processed = ProcessCommand(id);
 940     }
 941     else
 942     {
 943         processed = FALSE;
 944     }
 945
 946     return processed;
 947 }
 948
 949 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
 950                                         WXHWND hwndAct,
 951                                         WXHWND hwndDeact)
 952 {
 953     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
 954
 955     HMENU menuToSet = 0;
 956
 957     bool activated;
 958
 959     if ( m_hWnd == hwndAct )
 960     {
 961         activated = TRUE;
 962         parent->m_currentChild = this;
 963
 964         HMENU child_menu = (HMENU)GetWinMenu();
 965         if ( child_menu )
 966         {
 967             parent->m_parentFrameActive = FALSE;
 968
 969             menuToSet = child_menu;
 970         }
 971     }
 972     else if ( m_hWnd == hwndDeact )
 973     {
 974         wxASSERT_MSG( parent->m_currentChild == this,
 975                       wxT("can't deactivate MDI child which wasn't active!") );
 976
 977         activated = FALSE;
 978         parent->m_currentChild = NULL;
 979
 980         HMENU parent_menu = (HMENU)parent->GetWinMenu();
 981         if ( parent_menu )
 982         {
 983             parent->m_parentFrameActive = TRUE;
 984
 985             menuToSet = parent_menu;
 986         }
 987     }
 988     else
 989     {
 990         // we have nothing to do with it
 991         return FALSE;
 992     }
 993
 994     if ( menuToSet )
 995     {
 996         HMENU subMenu = (HMENU) 0;
 997         if (parent->GetWindowMenu())
 998             subMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
 999
1000         MDISetMenu(parent->GetClientWindow(), menuToSet, subMenu);
1001     }
1002
1003     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1004     event.SetEventObject( this );
1005
1006     ResetWindowStyle((void *)NULL);
1007
1008     return GetEventHandler()->ProcessEvent(event);
1009 }
1010
1011 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1012 {
1013     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1014 #if defined(__WIN95__)
1015     if (!(lpPos->flags & SWP_NOSIZE))
1016     {
1017         RECT rectClient;
1018         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1019         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1020         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1021         {
1022             ::AdjustWindowRectEx(&rectClient, dwStyle, FALSE, dwExStyle);
1023             lpPos->x = rectClient.left;
1024             lpPos->y = rectClient.top;
1025             lpPos->cx = rectClient.right - rectClient.left;
1026             lpPos->cy = rectClient.bottom - rectClient.top;
1027         }
1028         wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1029         if (pFrameWnd && pFrameWnd->GetToolBar() && pFrameWnd->GetToolBar()->IsShown())
1030         {
1031             pFrameWnd->GetToolBar()->Refresh();
1032         }
1033     }
1034 #endif // Win95
1035
1036     return FALSE;
1037 }
1038
1039 // ---------------------------------------------------------------------------
1040 // MDI specific message translation/preprocessing
1041 // ---------------------------------------------------------------------------
1042
1043 long wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXUINT wParam, WXLPARAM lParam)
1044 {
1045     return DefMDIChildProc(GetHwnd(),
1046                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1047 }
1048
1049 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1050 {
1051     return wxFrame::MSWTranslateMessage(msg);
1052 }
1053
1054 // ---------------------------------------------------------------------------
1055 // misc
1056 // ---------------------------------------------------------------------------
1057
1058 void wxMDIChildFrame::MSWDestroyWindow()
1059 {
1060     MSWDetachWindowMenu();
1061     invalidHandle = GetHwnd();
1062
1063     wxMDIParentFrame *parent = (wxMDIParentFrame *)GetParent();
1064
1065     // Must make sure this handle is invalidated (set to NULL) since all sorts
1066     // of things could happen after the child client is destroyed, but before
1067     // the wxFrame is destroyed.
1068
1069     HWND oldHandle = (HWND)GetHWND();
1070     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1071                 (WPARAM)oldHandle, 0);
1072
1073     if (parent->GetActiveChild() == (wxMDIChildFrame*) NULL)
1074         ResetWindowStyle((void*) NULL);
1075
1076     invalidHandle = 0;
1077
1078     if (m_hMenu)
1079     {
1080         ::DestroyMenu((HMENU) m_hMenu);
1081         m_hMenu = 0;
1082     }
1083     wxRemoveHandleAssociation(this);
1084     m_hWnd = 0;
1085 }
1086
1087 // Change the client window's extended style so we don't get a client edge
1088 // style when a child is maximised (a double border looks silly.)
1089 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1090 {
1091 #if defined(__WIN95__)
1092     RECT *rect = (RECT *)vrect;
1093     wxMDIParentFrame* pFrameWnd = (wxMDIParentFrame *)GetParent();
1094     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1095     if (!pChild || (pChild == this))
1096     {
1097         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1098         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1099
1100         // we want to test whether there is a maximized child, so just set
1101         // dwThisStyle to 0 if there is no child at all
1102         DWORD dwThisStyle = pChild
1103             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1104         DWORD dwNewStyle = dwStyle;
1105         if ( dwThisStyle & WS_MAXIMIZE )
1106             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1107         else
1108             dwNewStyle |= WS_EX_CLIENTEDGE;
1109
1110         if (dwStyle != dwNewStyle)
1111         {
1112             // force update of everything
1113             ::RedrawWindow(hwndClient, NULL, NULL,
1114                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1115             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1116             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1117                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1118                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1119                            SWP_NOCOPYBITS);
1120             if (rect)
1121                 ::GetClientRect(hwndClient, rect);
1122
1123             return TRUE;
1124         }
1125     }
1126 #endif // Win95
1127
1128     return FALSE;
1129 }
1130
1131 // ===========================================================================
1132 // wxMDIClientWindow: the window of predefined (by Windows) class which
1133 // contains the child frames
1134 // ===========================================================================
1135
1136 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1137 {
1138     m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_APPWORKSPACE);
1139
1140     CLIENTCREATESTRUCT ccs;
1141     m_windowStyle = style;
1142     m_parent = parent;
1143
1144     ccs.hWindowMenu = (HMENU) 0;
1145     if (parent->GetWindowMenu())
1146         ccs.hWindowMenu = (HMENU) parent->GetWindowMenu()->GetHMenu();
1147     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1148
1149     DWORD msStyle = /* MDIS_ALLCHILDSTYLES | */ WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN;
1150     if ( style & wxHSCROLL )
1151         msStyle |= WS_HSCROLL;
1152     if ( style & wxVSCROLL )
1153         msStyle |= WS_VSCROLL;
1154
1155 #if defined(__WIN95__)
1156     DWORD exStyle = WS_EX_CLIENTEDGE;
1157 #else
1158     DWORD exStyle = 0;
1159 #endif
1160
1161     wxWndHook = this;
1162     m_hWnd = (WXHWND)::CreateWindowEx
1163                        (
1164                         exStyle,
1165                         wxT("MDICLIENT"),
1166                         NULL,
1167                         msStyle,
1168                         0, 0, 0, 0,
1169                         GetWinHwnd(parent),
1170                         NULL,
1171                         wxGetInstance(),
1172                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1173     if ( !m_hWnd )
1174     {
1175         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1176
1177         return FALSE;
1178     }
1179
1180     SubclassWin(m_hWnd);
1181     wxWndHook = NULL;
1182
1183     return TRUE;
1184 }
1185
1186 // Explicitly call default scroll behaviour
1187 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1188 {
1189     // Note: for client windows, the scroll position is not set in
1190     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1191     // scroll position we're at.
1192     // This makes it hard to paint patterns or bitmaps in the background,
1193     // and have the client area scrollable as well.
1194
1195     if ( event.GetOrientation() == wxHORIZONTAL )
1196         m_scrollX = event.GetPosition(); // Always returns zero!
1197     else
1198         m_scrollY = event.GetPosition(); // Always returns zero!
1199
1200     event.Skip();
1201 }
1202
1203 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1204 {
1205     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1206     // client area, you can end up with a non-refreshed portion in the client window
1207     // (see OGL studio sample). So check if the position is changed and if so,
1208     // redraw the MDI child frames.
1209
1210     wxPoint oldPos = GetPosition();
1211
1212     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
1213
1214     wxPoint newPos = GetPosition();
1215
1216     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1217     {
1218         if (GetParent())
1219         {
1220             wxNode* node = GetParent()->GetChildren().First();
1221             while (node)
1222             {
1223                 wxWindow* child = (wxWindow*) node->Data();
1224                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1225                 {
1226                     HWND hWnd = (HWND) child->GetHWND();
1227                    ::RedrawWindow(hWnd, NULL, NULL, RDW_FRAME|RDW_ALLCHILDREN|RDW_INVALIDATE );
1228                 }
1229                 node = node->Next();
1230             }
1231         }
1232     }
1233 }
1234
1235 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1236 {
1237     // MDI child frames get their WM_SIZE when they're constructed but at this
1238     // moment they don't have any children yet so all child windows will be
1239     // positioned incorrectly when they are added later - to fix this, we
1240     // generate an artificial size event here
1241     if ( m_needsResize )
1242     {
1243         m_needsResize = FALSE; // avoid any possibility of recursion
1244
1245         SendSizeEvent();
1246     }
1247
1248     event.Skip();
1249 }
1250
1251 // ---------------------------------------------------------------------------
1252 // non member functions
1253 // ---------------------------------------------------------------------------
1254
1255 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1256 {
1257     ::SendMessage(GetWinHwnd(win), WM_MDISETMENU,
1258 #ifdef __WIN32__
1259                   (WPARAM)hmenuFrame, (LPARAM)hmenuWindow
1260 #else
1261                   0, MAKELPARAM(hmenuFrame, hmenuWindow)
1262 #endif
1263                  );
1264
1265     // update menu bar of the parent window
1266     wxWindow *parent = win->GetParent();
1267     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1268
1269 #ifndef __WIN16__
1270     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1271 #endif
1272
1273     ::DrawMenuBar(GetWinHwnd(parent));
1274 }
1275
1276 static void InsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1277 {
1278     // Try to insert Window menu in front of Help, otherwise append it.
1279     HMENU hmenu = (HMENU)menu;
1280
1281     if (subMenu)
1282     {
1283     int N = GetMenuItemCount(hmenu);
1284     bool success = FALSE;
1285     for ( int i = 0; i < N; i++ )
1286     {
1287         wxChar buf[256];
1288         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1289         if ( chars == 0 )
1290         {
1291             wxLogLastError(wxT("GetMenuString"));
1292
1293             continue;
1294         }
1295
1296         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Help")) )
1297         {
1298             success = TRUE;
1299             ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1300                          (UINT)subMenu, _("&Window"));
1301             break;
1302         }
1303     }
1304
1305     if ( !success )
1306     {
1307         ::AppendMenu(hmenu, MF_POPUP, (UINT)subMenu, _("&Window"));
1308     }
1309     }
1310
1311     MDISetMenu(win, hmenu, subMenu);
1312 }
1313
1314 static void RemoveWindowMenu(wxWindow *win, WXHMENU menu)
1315 {
1316     // Try to insert Window menu in front of Help, otherwise append it.
1317     HMENU hmenu = (HMENU)menu;
1318     int N = GetMenuItemCount(hmenu);
1319     for ( int i = 0; i < N; i++ )
1320     {
1321         wxChar buf[256];
1322         int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1323         if ( chars == 0 )
1324         {
1325             wxLogLastError(wxT("GetMenuString"));
1326
1327             continue;
1328         }
1329
1330         if ( wxStripMenuCodes(wxString(buf)).IsSameAs(_("Window")) )
1331         {
1332             ::RemoveMenu(hmenu, i, MF_BYPOSITION);
1333             break;
1334         }
1335     }
1336
1337     // Does passing 0 for the window menu really work with WM_MDISETMENU?
1338     MDISetMenu(win, hmenu, 0);
1339 }
1340
1341 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1342                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1343 {
1344 #ifdef __WIN32__
1345     *activate = TRUE;
1346     *hwndAct = (WXHWND)lParam;
1347     *hwndDeact = (WXHWND)wParam;
1348 #else // Win16
1349     *activate = (WXWORD)wParam;
1350     *hwndAct = (WXHWND)LOWORD(lParam);
1351     *hwndDeact = (WXHWND)HIWORD(lParam);
1352 #endif // Win32/Win16
1353 }