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