src/msw/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/mdi.cpp
   3 // Purpose:     MDI classes for wxMSW
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin on 2008-11-04 to use the base classes
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 //              (c) 2008-2009 Vadim Zeitlin
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ===========================================================================
  14 // declarations
  15 // ===========================================================================
  16
  17 // ---------------------------------------------------------------------------
  18 // headers
  19 // ---------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_MDI && !defined(__WXUNIVERSAL__)
  29
  30 #include "wx/mdi.h"
  31
  32 #ifndef WX_PRECOMP
  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     #include "wx/statusbr.h"
  39     #include "wx/settings.h"
  40     #include "wx/intl.h"
  41     #include "wx/log.h"
  42     #include "wx/toolbar.h"
  43 #endif
  44
  45 #include "wx/stockitem.h"
  46 #include "wx/msw/private.h"
  47
  48 #include <string.h>
  49
  50 // ---------------------------------------------------------------------------
  51 // global variables
  52 // ---------------------------------------------------------------------------
  53
  54 extern wxMenu *wxCurrentPopupMenu;
  55
  56 extern void wxRemoveHandleAssociation(wxWindow *win);
  57
  58 // ---------------------------------------------------------------------------
  59 // constants
  60 // ---------------------------------------------------------------------------
  61
  62 static const int IDM_WINDOWTILEHOR  = 4001;
  63 static const int IDM_WINDOWCASCADE = 4002;
  64 static const int IDM_WINDOWICONS = 4003;
  65 static const int IDM_WINDOWNEXT = 4004;
  66 static const int IDM_WINDOWTILEVERT = 4005;
  67 static const int IDM_WINDOWPREV = 4006;
  68
  69 // This range gives a maximum of 500 MDI children. Should be enough :-)
  70 static const int wxFIRST_MDI_CHILD = 4100;
  71 static const int wxLAST_MDI_CHILD = 4600;
  72
  73 // ---------------------------------------------------------------------------
  74 // private functions
  75 // ---------------------------------------------------------------------------
  76
  77 // set the MDI menus (by sending the WM_MDISETMENU message) and update the menu
  78 // of the parent of win (which is supposed to be the MDI client window)
  79 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow);
  80
  81 // insert the window menu (subMenu) into menu just before "Help" submenu or at
  82 // the very end if not found
  83 static void MDIInsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu);
  84
  85 // Remove the window menu
  86 static void MDIRemoveWindowMenu(wxWindow *win, WXHMENU menu);
  87
  88 // is this an id of an MDI child?
  89 inline bool IsMdiCommandId(int id)
  90 {
  91     return (id >= wxFIRST_MDI_CHILD) && (id <= wxLAST_MDI_CHILD);
  92 }
  93
  94 // unpack the parameters of WM_MDIACTIVATE message
  95 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
  96                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact);
  97
  98 // return the HMENU of the MDI menu
  99 //
 100 // this function works correctly even when we don't have a window menu and just
 101 // returns 0 then
 102 static inline HMENU GetMDIWindowMenu(wxMDIParentFrame *frame)
 103 {
 104     wxMenu *menu = frame->GetWindowMenu();
 105     return menu ? GetHmenuOf(menu) : 0;
 106 }
 107
 108 // ===========================================================================
 109 // implementation
 110 // ===========================================================================
 111
 112 // ---------------------------------------------------------------------------
 113 // wxWin macros
 114 // ---------------------------------------------------------------------------
 115
 116 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
 117 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
 118 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxWindow)
 119
 120 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
 121     EVT_SIZE(wxMDIParentFrame::OnSize)
 122     EVT_ICONIZE(wxMDIParentFrame::OnIconized)
 123     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
 124 END_EVENT_TABLE()
 125
 126 BEGIN_EVENT_TABLE(wxMDIChildFrame, wxFrame)
 127     EVT_IDLE(wxMDIChildFrame::OnIdle)
 128 END_EVENT_TABLE()
 129
 130 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxWindow)
 131     EVT_SCROLL(wxMDIClientWindow::OnScroll)
 132 END_EVENT_TABLE()
 133
 134 // ===========================================================================
 135 // wxMDIParentFrame: the frame which contains the client window which manages
 136 // the children
 137 // ===========================================================================
 138
 139 wxMDIParentFrame::wxMDIParentFrame()
 140 {
 141     m_parentFrameActive = true;
 142 }
 143
 144 bool wxMDIParentFrame::Create(wxWindow *parent,
 145                               wxWindowID id,
 146                               const wxString& title,
 147                               const wxPoint& pos,
 148                               const wxSize& size,
 149                               long style,
 150                               const wxString& name)
 151 {
 152   // this style can be used to prevent a window from having the standard MDI
 153   // "Window" menu
 154   if ( !(style & wxFRAME_NO_WINDOW_MENU) )
 155   {
 156       // normal case: we have the window menu, so construct it
 157       m_windowMenu = new wxMenu;
 158
 159       m_windowMenu->Append(IDM_WINDOWCASCADE, _("&Cascade"));
 160       m_windowMenu->Append(IDM_WINDOWTILEHOR, _("Tile &Horizontally"));
 161       m_windowMenu->Append(IDM_WINDOWTILEVERT, _("Tile &Vertically"));
 162       m_windowMenu->AppendSeparator();
 163       m_windowMenu->Append(IDM_WINDOWICONS, _("&Arrange Icons"));
 164       m_windowMenu->Append(IDM_WINDOWNEXT, _("&Next"));
 165       m_windowMenu->Append(IDM_WINDOWPREV, _("&Previous"));
 166   }
 167
 168   m_parentFrameActive = true;
 169
 170   if (!parent)
 171     wxTopLevelWindows.Append(this);
 172
 173   SetName(name);
 174   m_windowStyle = style;
 175
 176   if ( parent )
 177       parent->AddChild(this);
 178
 179   if ( id != wxID_ANY )
 180     m_windowId = id;
 181   else
 182     m_windowId = NewControlId();
 183
 184   WXDWORD exflags;
 185   WXDWORD msflags = MSWGetCreateWindowFlags(&exflags);
 186   msflags &= ~WS_VSCROLL;
 187   msflags &= ~WS_HSCROLL;
 188
 189   if ( !wxWindow::MSWCreate(wxApp::GetRegisteredClassName(_T("wxMDIFrame")),
 190                             title.wx_str(),
 191                             pos, size,
 192                             msflags,
 193                             exflags) )
 194   {
 195       return false;
 196   }
 197
 198   SetOwnBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 199
 200   // unlike (almost?) all other windows, frames are created hidden
 201   m_isShown = false;
 202
 203   return true;
 204 }
 205
 206 wxMDIParentFrame::~wxMDIParentFrame()
 207 {
 208     // see comment in ~wxMDIChildFrame
 209 #if wxUSE_TOOLBAR
 210     m_frameToolBar = NULL;
 211 #endif
 212 #if wxUSE_STATUSBAR
 213     m_frameStatusBar = NULL;
 214 #endif // wxUSE_STATUSBAR
 215
 216     DestroyChildren();
 217
 218     // the MDI frame menubar is not automatically deleted by Windows unlike for
 219     // the normal frames
 220     if ( m_hMenu )
 221         ::DestroyMenu((HMENU)m_hMenu);
 222
 223     if ( m_clientWindow )
 224     {
 225         if ( m_clientWindow->MSWGetOldWndProc() )
 226             m_clientWindow->UnsubclassWin();
 227
 228         m_clientWindow->SetHWND(0);
 229         delete m_clientWindow;
 230     }
 231 }
 232
 233 // ----------------------------------------------------------------------------
 234 // wxMDIParentFrame child management
 235 // ----------------------------------------------------------------------------
 236
 237 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 238 {
 239     HWND hWnd = (HWND)::SendMessage(GetWinHwnd(GetClientWindow()),
 240                                     WM_MDIGETACTIVE, 0, 0L);
 241     if ( hWnd == 0 )
 242         return NULL;
 243
 244     return (wxMDIChildFrame *)wxFindWinFromHandle(hWnd);
 245 }
 246
 247 int wxMDIParentFrame::GetChildFramesCount() const
 248 {
 249     int count = 0;
 250     for ( wxWindowList::const_iterator i = GetChildren().begin();
 251           i != GetChildren().end();
 252           ++i )
 253     {
 254         if ( wxDynamicCast(*i, wxMDIChildFrame) )
 255             count++;
 256     }
 257
 258     return count;
 259 }
 260
 261 #if wxUSE_MENUS
 262
 263 void wxMDIParentFrame::AddMDIChild(wxMDIChildFrame * WXUNUSED(child))
 264 {
 265     switch ( GetChildFramesCount() )
 266     {
 267         case 1:
 268             // first MDI child was just added, we need to insert the window
 269             // menu now if we have it
 270             AddWindowMenu();
 271
 272             // and disable the items which can't be used until we have more
 273             // than one child
 274             UpdateWindowMenu(false);
 275             break;
 276
 277         case 2:
 278             // second MDI child was added, enable the menu items which were
 279             // disabled because they didn't make sense for a single window
 280             UpdateWindowMenu(true);
 281             break;
 282     }
 283 }
 284
 285 void wxMDIParentFrame::RemoveMDIChild(wxMDIChildFrame * WXUNUSED(child))
 286 {
 287     switch ( GetChildFramesCount() )
 288     {
 289         case 1:
 290             // last MDI child is being removed, remove the now unnecessary
 291             // window menu too
 292             RemoveWindowMenu();
 293
 294             // there is no need to call UpdateWindowMenu(true) here so this is
 295             // not quite symmetric to AddMDIChild() above
 296             break;
 297
 298         case 2:
 299             // only one MDI child is going to remain, disable the menu commands
 300             // which don't make sense for a single child window
 301             UpdateWindowMenu(false);
 302             break;
 303     }
 304 }
 305
 306 // ----------------------------------------------------------------------------
 307 // wxMDIParentFrame window menu handling
 308 // ----------------------------------------------------------------------------
 309
 310 void wxMDIParentFrame::AddWindowMenu()
 311 {
 312     if ( m_windowMenu )
 313         MDIInsertWindowMenu(GetClientWindow(), m_hMenu, GetMDIWindowMenu(this));
 314 }
 315
 316 void wxMDIParentFrame::RemoveWindowMenu()
 317 {
 318     if ( m_windowMenu )
 319         MDIRemoveWindowMenu(GetClientWindow(), m_hMenu);
 320 }
 321
 322 void wxMDIParentFrame::UpdateWindowMenu(bool enable)
 323 {
 324     if ( m_windowMenu )
 325     {
 326         m_windowMenu->Enable(IDM_WINDOWNEXT, enable);
 327         m_windowMenu->Enable(IDM_WINDOWPREV, enable);
 328     }
 329 }
 330
 331 #if wxUSE_MENUS_NATIVE
 332
 333 void wxMDIParentFrame::InternalSetMenuBar()
 334 {
 335     m_parentFrameActive = true;
 336
 337     if ( GetActiveChild() )
 338     {
 339         AddWindowMenu();
 340     }
 341     else // we don't have any MDI children yet
 342     {
 343         // wait until we do to add the window menu but do set the main menu for
 344         // now (this is done by AddWindowMenu() as a side effect)
 345         MDISetMenu(GetClientWindow(), (HMENU)m_hMenu, NULL);
 346     }
 347 }
 348
 349 #endif // wxUSE_MENUS_NATIVE
 350
 351 void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
 352 {
 353     // notice that Remove/AddWindowMenu() are safe to call even when
 354     // m_windowMenu is NULL
 355     RemoveWindowMenu();
 356
 357     delete m_windowMenu;
 358
 359     m_windowMenu = menu;
 360
 361     AddWindowMenu();
 362 }
 363
 364 // ----------------------------------------------------------------------------
 365 // wxMDIParentFrame other menu-related stuff
 366 // ----------------------------------------------------------------------------
 367
 368 void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
 369 {
 370     wxMDIChildFrame *child = GetActiveChild();
 371     if ( child )
 372     {
 373         wxEvtHandler* source = child->GetEventHandler();
 374         wxMenuBar* bar = child->GetMenuBar();
 375
 376         if (menu)
 377         {
 378             menu->UpdateUI(source);
 379         }
 380         else
 381         {
 382             if ( bar != NULL )
 383             {
 384                 int nCount = bar->GetMenuCount();
 385                 for (int n = 0; n < nCount; n++)
 386                     bar->GetMenu(n)->UpdateUI(source);
 387             }
 388         }
 389     }
 390     else
 391     {
 392         wxFrameBase::DoMenuUpdates(menu);
 393     }
 394 }
 395
 396 const wxMenuItem *wxMDIParentFrame::FindItemInMenuBar(int menuId) const
 397 {
 398     const wxMenuItem *item = wxFrame::FindItemInMenuBar(menuId);
 399     if ( !item && m_currentChild )
 400     {
 401         item = m_currentChild->FindItemInMenuBar(menuId);
 402     }
 403
 404     return item;
 405 }
 406
 407 WXHMENU wxMDIParentFrame::MSWGetActiveMenu() const
 408 {
 409     wxMDIChildFrame * const child  = GetActiveChild();
 410     if ( child )
 411     {
 412         const WXHMENU hmenu = child->MSWGetActiveMenu();
 413         if ( hmenu )
 414             return hmenu;
 415     }
 416
 417     return wxFrame::MSWGetActiveMenu();
 418 }
 419
 420 #endif // wxUSE_MENUS
 421
 422 // ----------------------------------------------------------------------------
 423 // wxMDIParentFrame event handling
 424 // ----------------------------------------------------------------------------
 425
 426 void wxMDIParentFrame::UpdateClientSize()
 427 {
 428     if ( GetClientWindow() )
 429     {
 430         int width, height;
 431         GetClientSize(&width, &height);
 432
 433         GetClientWindow()->SetSize(0, 0, width, height);
 434     }
 435 }
 436
 437 void wxMDIParentFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 438 {
 439     UpdateClientSize();
 440
 441     // do not call event.Skip() here, it somehow messes up MDI client window
 442 }
 443
 444 void wxMDIParentFrame::OnIconized(wxIconizeEvent& event)
 445 {
 446     event.Skip();
 447
 448     if ( !event.IsIconized() )
 449         UpdateClientSize();
 450 }
 451
 452 // Responds to colour changes, and passes event on to children.
 453 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 454 {
 455     if ( m_clientWindow )
 456     {
 457         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 458         m_clientWindow->Refresh();
 459     }
 460
 461     event.Skip();
 462 }
 463
 464 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 465 {
 466     // we don't have any standard icons (any more)
 467     return (WXHICON)0;
 468 }
 469
 470 // ---------------------------------------------------------------------------
 471 // MDI operations
 472 // ---------------------------------------------------------------------------
 473
 474 void wxMDIParentFrame::Cascade()
 475 {
 476     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 477 }
 478
 479 void wxMDIParentFrame::Tile(wxOrientation orient)
 480 {
 481     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 482                   _T("invalid orientation value") );
 483
 484     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 485                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 486                                          : MDITILE_VERTICAL, 0);
 487 }
 488
 489 void wxMDIParentFrame::ArrangeIcons()
 490 {
 491     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 492 }
 493
 494 void wxMDIParentFrame::ActivateNext()
 495 {
 496     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 497 }
 498
 499 void wxMDIParentFrame::ActivatePrevious()
 500 {
 501     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 502 }
 503
 504 // ---------------------------------------------------------------------------
 505 // the MDI parent frame window proc
 506 // ---------------------------------------------------------------------------
 507
 508 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 509                                      WXWPARAM wParam,
 510                                      WXLPARAM lParam)
 511 {
 512     WXLRESULT rc = 0;
 513     bool processed = false;
 514
 515     switch ( message )
 516     {
 517         case WM_ACTIVATE:
 518             {
 519                 WXWORD state, minimized;
 520                 WXHWND hwnd;
 521                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 522
 523                 processed = HandleActivate(state, minimized != 0, hwnd);
 524             }
 525             break;
 526
 527         case WM_COMMAND:
 528             {
 529                 WXWORD id, cmd;
 530                 WXHWND hwnd;
 531                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 532
 533                 (void)HandleCommand(id, cmd, hwnd);
 534
 535                 // even if the frame didn't process it, there is no need to try it
 536                 // once again (i.e. call wxFrame::HandleCommand()) - we just did it,
 537                 // so pretend we processed the message anyhow
 538                 processed = true;
 539             }
 540
 541             // always pass this message DefFrameProc(), otherwise MDI menu
 542             // commands (and sys commands - more surprisingly!) won't work
 543             MSWDefWindowProc(message, wParam, lParam);
 544             break;
 545
 546         case WM_CREATE:
 547             m_clientWindow = OnCreateClient();
 548             // Uses own style for client style
 549             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 550             {
 551                 wxLogMessage(_("Failed to create MDI parent frame."));
 552
 553                 rc = -1;
 554             }
 555
 556             processed = true;
 557             break;
 558
 559         case WM_ERASEBKGND:
 560             processed = true;
 561
 562             // we erase background ourselves
 563             rc = true;
 564             break;
 565
 566         case WM_SIZE:
 567             // though we don't (usually) resize the MDI client to exactly fit the
 568             // client area we need to pass this one to DefFrameProc to allow the children to show
 569             break;
 570     }
 571
 572     if ( !processed )
 573         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 574
 575     return rc;
 576 }
 577
 578 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 579 {
 580     bool processed = false;
 581
 582     if ( wxWindow::HandleActivate(state, minimized, activate) )
 583     {
 584         // already processed
 585         processed = true;
 586     }
 587
 588     // If this window is an MDI parent, we must also send an OnActivate message
 589     // to the current child.
 590     if ( (m_currentChild != NULL) &&
 591          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 592     {
 593         wxActivateEvent event(wxEVT_ACTIVATE, true, m_currentChild->GetId());
 594         event.SetEventObject( m_currentChild );
 595         if ( m_currentChild->HandleWindowEvent(event) )
 596             processed = true;
 597     }
 598
 599     return processed;
 600 }
 601
 602 bool wxMDIParentFrame::HandleCommand(WXWORD id_, WXWORD cmd, WXHWND hwnd)
 603 {
 604     // sign extend to int from short before comparing with the other int ids
 605     int id = (signed short)id_;
 606
 607     // In case it's e.g. a toolbar.
 608     if ( hwnd )
 609     {
 610         wxWindow *win = wxFindWinFromHandle(hwnd);
 611         if ( win )
 612             return win->MSWCommand(cmd, id);
 613     }
 614
 615     if (wxCurrentPopupMenu)
 616     {
 617         wxMenu *popupMenu = wxCurrentPopupMenu;
 618         wxCurrentPopupMenu = NULL;
 619         if (popupMenu->MSWCommand(cmd, id))
 620             return true;
 621     }
 622
 623     // is it one of standard MDI commands?
 624     WXWPARAM wParam = 0;
 625     WXLPARAM lParam = 0;
 626     int msg;
 627     switch ( id )
 628     {
 629         case IDM_WINDOWCASCADE:
 630             msg = WM_MDICASCADE;
 631             wParam = MDITILE_SKIPDISABLED;
 632             break;
 633
 634         case IDM_WINDOWTILEHOR:
 635             wParam |= MDITILE_HORIZONTAL;
 636             // fall through
 637
 638         case IDM_WINDOWTILEVERT:
 639             if ( !wParam )
 640                 wParam = MDITILE_VERTICAL;
 641             msg = WM_MDITILE;
 642             wParam |= MDITILE_SKIPDISABLED;
 643             break;
 644
 645         case IDM_WINDOWICONS:
 646             msg = WM_MDIICONARRANGE;
 647             break;
 648
 649         case IDM_WINDOWNEXT:
 650             msg = WM_MDINEXT;
 651             lParam = 0;         // next child
 652             break;
 653
 654         case IDM_WINDOWPREV:
 655             msg = WM_MDINEXT;
 656             lParam = 1;         // previous child
 657             break;
 658
 659         default:
 660             msg = 0;
 661     }
 662
 663     if ( msg )
 664     {
 665         ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 666
 667         return true;
 668     }
 669
 670     // FIXME VZ: what does this test do??
 671     if (id >= 0xF000)
 672     {
 673         return false; // Get WndProc to call default proc
 674     }
 675
 676     if ( IsMdiCommandId(id) )
 677     {
 678         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 679         while ( node )
 680         {
 681             wxWindow *child = node->GetData();
 682             if ( child->GetHWND() )
 683             {
 684                 int childId = wxGetWindowId(child->GetHWND());
 685                 if ( childId == (signed short)id )
 686                 {
 687                     ::SendMessage( GetWinHwnd(GetClientWindow()),
 688                                    WM_MDIACTIVATE,
 689                                    (WPARAM)child->GetHWND(), 0);
 690                     return true;
 691                 }
 692             }
 693             node = node->GetNext();
 694         }
 695     }
 696     else if ( m_parentFrameActive )
 697     {
 698         return ProcessCommand(id);
 699     }
 700     else if ( m_currentChild )
 701     {
 702         return m_currentChild->HandleCommand(id, cmd, hwnd);
 703     }
 704     else
 705     {
 706         // this shouldn't happen because it means that our messages are being
 707         // lost (they're not sent to the parent frame nor to the children)
 708         wxFAIL_MSG(wxT("MDI parent frame is not active, yet there is no active MDI child?"));
 709     }
 710
 711     return false;
 712 }
 713
 714 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 715                                         WXWPARAM wParam,
 716                                         WXLPARAM lParam)
 717 {
 718     WXHWND clientWnd;
 719     if ( GetClientWindow() )
 720         clientWnd = GetClientWindow()->GetHWND();
 721     else
 722         clientWnd = 0;
 723
 724     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 725 }
 726
 727 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 728 {
 729     MSG *pMsg = (MSG *)msg;
 730
 731     // first let the current child get it
 732     if ( m_currentChild && m_currentChild->GetHWND() &&
 733          m_currentChild->MSWTranslateMessage(msg) )
 734     {
 735         return true;
 736     }
 737
 738     // then try out accel table (will also check the menu accels)
 739     if ( wxFrame::MSWTranslateMessage(msg) )
 740     {
 741         return true;
 742     }
 743
 744     // finally, check for MDI specific built in accel keys
 745     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 746     {
 747         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 748             return true;
 749     }
 750
 751     return false;
 752 }
 753
 754 // ===========================================================================
 755 // wxMDIChildFrame
 756 // ===========================================================================
 757
 758 void wxMDIChildFrame::Init()
 759 {
 760     m_needsResize = true;
 761     m_needsInitialShow = true;
 762 }
 763
 764 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 765                              wxWindowID id,
 766                              const wxString& title,
 767                              const wxPoint& pos,
 768                              const wxSize& size,
 769                              long style,
 770                              const wxString& name)
 771 {
 772     m_mdiParent = parent;
 773
 774   SetName(name);
 775
 776   if ( id != wxID_ANY )
 777     m_windowId = id;
 778   else
 779     m_windowId = NewControlId();
 780
 781   if ( parent )
 782   {
 783       parent->AddChild(this);
 784   }
 785
 786   int x = pos.x;
 787   int y = pos.y;
 788   int width = size.x;
 789   int height = size.y;
 790
 791   MDICREATESTRUCT mcs;
 792
 793   wxString className =
 794       wxApp::GetRegisteredClassName(_T("wxMDIChildFrame"), COLOR_WINDOW);
 795   if ( !(style & wxFULL_REPAINT_ON_RESIZE) )
 796       className += wxApp::GetNoRedrawClassSuffix();
 797
 798   mcs.szClass = className.wx_str();
 799   mcs.szTitle = title.wx_str();
 800   mcs.hOwner = wxGetInstance();
 801   if (x != wxDefaultCoord)
 802       mcs.x = x;
 803   else
 804       mcs.x = CW_USEDEFAULT;
 805
 806   if (y != wxDefaultCoord)
 807       mcs.y = y;
 808   else
 809       mcs.y = CW_USEDEFAULT;
 810
 811   if (width != wxDefaultCoord)
 812       mcs.cx = width;
 813   else
 814       mcs.cx = CW_USEDEFAULT;
 815
 816   if (height != wxDefaultCoord)
 817       mcs.cy = height;
 818   else
 819       mcs.cy = CW_USEDEFAULT;
 820
 821   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 822   if (style & wxMINIMIZE_BOX)
 823     msflags |= WS_MINIMIZEBOX;
 824   if (style & wxMAXIMIZE_BOX)
 825     msflags |= WS_MAXIMIZEBOX;
 826   if (style & wxRESIZE_BORDER)
 827     msflags |= WS_THICKFRAME;
 828   if (style & wxSYSTEM_MENU)
 829     msflags |= WS_SYSMENU;
 830   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 831     msflags |= WS_MINIMIZE;
 832   if (style & wxMAXIMIZE)
 833     msflags |= WS_MAXIMIZE;
 834   if (style & wxCAPTION)
 835     msflags |= WS_CAPTION;
 836
 837   mcs.style = msflags;
 838
 839   mcs.lParam = 0;
 840
 841   wxWindowCreationHook hook(this);
 842
 843   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 844                                  WM_MDICREATE, 0, (LPARAM)&mcs);
 845
 846   if ( !m_hWnd )
 847   {
 848       wxLogLastError(_T("WM_MDICREATE"));
 849       return false;
 850   }
 851
 852   SubclassWin(m_hWnd);
 853
 854   parent->AddMDIChild(this);
 855
 856   return true;
 857 }
 858
 859 wxMDIChildFrame::~wxMDIChildFrame()
 860 {
 861     // if we hadn't been created, there is nothing to destroy
 862     if ( !m_hWnd )
 863         return;
 864
 865     GetMDIParent()->RemoveMDIChild(this);
 866
 867     // will be destroyed by DestroyChildren() but reset them before calling it
 868     // to avoid using dangling pointers if a callback comes in the meanwhile
 869 #if wxUSE_TOOLBAR
 870     m_frameToolBar = NULL;
 871 #endif
 872 #if wxUSE_STATUSBAR
 873     m_frameStatusBar = NULL;
 874 #endif // wxUSE_STATUSBAR
 875
 876     DestroyChildren();
 877
 878     MDIRemoveWindowMenu(NULL, m_hMenu);
 879
 880     MSWDestroyWindow();
 881 }
 882
 883 bool wxMDIChildFrame::Show(bool show)
 884 {
 885     m_needsInitialShow = false;
 886
 887     if (!wxFrame::Show(show))
 888         return false;
 889
 890     // KH: Without this call, new MDI children do not become active.
 891     // This was added here after the same BringWindowToTop call was
 892     // removed from wxTopLevelWindow::Show (November 2005)
 893     if ( show )
 894         ::BringWindowToTop(GetHwnd());
 895
 896     // we need to refresh the MDI frame window menu to include (or exclude if
 897     // we've been hidden) this frame
 898     wxMDIParentFrame * const parent = GetMDIParent();
 899     MDISetMenu(parent->GetClientWindow(), NULL, NULL);
 900
 901     return true;
 902 }
 903
 904 // Set the client size (i.e. leave the calculation of borders etc.
 905 // to wxWidgets)
 906 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 907 {
 908   HWND hWnd = GetHwnd();
 909
 910   RECT rect;
 911   ::GetClientRect(hWnd, &rect);
 912
 913   RECT rect2;
 914   GetWindowRect(hWnd, &rect2);
 915
 916   // Find the difference between the entire window (title bar and all)
 917   // and the client area; add this to the new client size to move the
 918   // window
 919   int actual_width = rect2.right - rect2.left - rect.right + width;
 920   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 921
 922 #if wxUSE_STATUSBAR
 923   if (GetStatusBar() && GetStatusBar()->IsShown())
 924   {
 925     int sx, sy;
 926     GetStatusBar()->GetSize(&sx, &sy);
 927     actual_height += sy;
 928   }
 929 #endif // wxUSE_STATUSBAR
 930
 931   POINT point;
 932   point.x = rect2.left;
 933   point.y = rect2.top;
 934
 935   // If there's an MDI parent, must subtract the parent's top left corner
 936   // since MoveWindow moves relative to the parent
 937   wxMDIParentFrame * const mdiParent = GetMDIParent();
 938   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 939
 940   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 941
 942   wxSize size(width, height);
 943   wxSizeEvent event(size, m_windowId);
 944   event.SetEventObject( this );
 945   HandleWindowEvent(event);
 946 }
 947
 948 // Unlike other wxTopLevelWindowBase, the mdi child's "GetPosition" is not the
 949 //  same as its GetScreenPosition
 950 void wxMDIChildFrame::DoGetScreenPosition(int *x, int *y) const
 951 {
 952   HWND hWnd = GetHwnd();
 953
 954   RECT rect;
 955   ::GetWindowRect(hWnd, &rect);
 956   if (x)
 957      *x = rect.left;
 958   if (y)
 959      *y = rect.top;
 960 }
 961
 962
 963 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 964 {
 965   RECT rect;
 966   GetWindowRect(GetHwnd(), &rect);
 967   POINT point;
 968   point.x = rect.left;
 969   point.y = rect.top;
 970
 971   // Since we now have the absolute screen coords,
 972   // if there's a parent we must subtract its top left corner
 973   wxMDIParentFrame * const mdiParent = GetMDIParent();
 974   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 975
 976   if (x)
 977       *x = point.x;
 978   if (y)
 979       *y = point.y;
 980 }
 981
 982 void wxMDIChildFrame::InternalSetMenuBar()
 983 {
 984     wxMDIParentFrame * const parent = GetMDIParent();
 985
 986     MDIInsertWindowMenu(parent->GetClientWindow(),
 987                      m_hMenu, GetMDIWindowMenu(parent));
 988
 989     parent->m_parentFrameActive = false;
 990 }
 991
 992 void wxMDIChildFrame::DetachMenuBar()
 993 {
 994     MDIRemoveWindowMenu(NULL, m_hMenu);
 995     wxFrame::DetachMenuBar();
 996 }
 997
 998 WXHICON wxMDIChildFrame::GetDefaultIcon() const
 999 {
1000     // we don't have any standard icons (any more)
1001     return (WXHICON)0;
1002 }
1003
1004 // ---------------------------------------------------------------------------
1005 // MDI operations
1006 // ---------------------------------------------------------------------------
1007
1008 void wxMDIChildFrame::Maximize(bool maximize)
1009 {
1010     wxMDIParentFrame * const parent = GetMDIParent();
1011     if ( parent && parent->GetClientWindow() )
1012     {
1013         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
1014                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
1015                       (WPARAM)GetHwnd(), 0);
1016     }
1017 }
1018
1019 void wxMDIChildFrame::Restore()
1020 {
1021     wxMDIParentFrame * const parent = GetMDIParent();
1022     if ( parent && parent->GetClientWindow() )
1023     {
1024         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
1025                       (WPARAM) GetHwnd(), 0);
1026     }
1027 }
1028
1029 void wxMDIChildFrame::Activate()
1030 {
1031     wxMDIParentFrame * const parent = GetMDIParent();
1032     if ( parent && parent->GetClientWindow() )
1033     {
1034         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
1035                       (WPARAM) GetHwnd(), 0);
1036     }
1037 }
1038
1039 // ---------------------------------------------------------------------------
1040 // MDI window proc and message handlers
1041 // ---------------------------------------------------------------------------
1042
1043 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
1044                                     WXWPARAM wParam,
1045                                     WXLPARAM lParam)
1046 {
1047     WXLRESULT rc = 0;
1048     bool processed = false;
1049
1050     switch ( message )
1051     {
1052         case WM_COMMAND:
1053             {
1054                 WORD id, cmd;
1055                 WXHWND hwnd;
1056                 UnpackCommand((WXWPARAM)wParam, (WXLPARAM)lParam,
1057                               &id, &hwnd, &cmd);
1058
1059                 processed = HandleCommand(id, cmd, (WXHWND)hwnd);
1060             }
1061             break;
1062
1063         case WM_GETMINMAXINFO:
1064             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
1065             break;
1066
1067         case WM_MDIACTIVATE:
1068             {
1069                 WXWORD act;
1070                 WXHWND hwndAct, hwndDeact;
1071                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
1072
1073                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
1074             }
1075             // fall through
1076
1077         case WM_MOVE:
1078             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
1079             // scrollbars if necessary
1080
1081             // fall through
1082
1083         case WM_SIZE:
1084             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
1085             // things happen
1086             MSWDefWindowProc(message, wParam, lParam);
1087             break;
1088
1089         case WM_SYSCOMMAND:
1090             // DefMDIChildProc handles SC_{NEXT/PREV}WINDOW here, so pass it
1091             // the message (the base class version does not)
1092             return MSWDefWindowProc(message, wParam, lParam);
1093
1094         case WM_WINDOWPOSCHANGING:
1095             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
1096             break;
1097     }
1098
1099     if ( !processed )
1100         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
1101
1102     return rc;
1103 }
1104
1105 bool wxMDIChildFrame::HandleCommand(WXWORD id_, WXWORD cmd, WXHWND hwnd)
1106 {
1107     // sign extend to int from short before comparing with the other int ids
1108     int id = (signed short)id_;
1109
1110     // In case it's e.g. a toolbar.
1111     if ( hwnd )
1112     {
1113         wxWindow *win = wxFindWinFromHandle(hwnd);
1114         if (win)
1115             return win->MSWCommand(cmd, id);
1116     }
1117
1118     if (wxCurrentPopupMenu)
1119     {
1120         wxMenu *popupMenu = wxCurrentPopupMenu;
1121         wxCurrentPopupMenu = NULL;
1122         if (popupMenu->MSWCommand(cmd, id))
1123             return true;
1124     }
1125
1126     bool processed;
1127     if (GetMenuBar() && GetMenuBar()->FindItem(id))
1128     {
1129         processed = ProcessCommand(id);
1130     }
1131     else
1132     {
1133         processed = false;
1134     }
1135
1136     return processed;
1137 }
1138
1139 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
1140                                         WXHWND hwndAct,
1141                                         WXHWND hwndDeact)
1142 {
1143     wxMDIParentFrame * const parent = GetMDIParent();
1144
1145     WXHMENU hMenuToSet = 0;
1146
1147     bool activated;
1148
1149     if ( m_hWnd == hwndAct )
1150     {
1151         activated = true;
1152         parent->m_currentChild = this;
1153
1154         WXHMENU hMenuChild = m_hMenu;
1155         if ( hMenuChild )
1156         {
1157             parent->m_parentFrameActive = false;
1158
1159             hMenuToSet = hMenuChild;
1160         }
1161     }
1162     else if ( m_hWnd == hwndDeact )
1163     {
1164         wxASSERT_MSG( parent->m_currentChild == this,
1165                       wxT("can't deactivate MDI child which wasn't active!") );
1166
1167         activated = false;
1168         parent->m_currentChild = NULL;
1169
1170         WXHMENU hMenuParent = parent->m_hMenu;
1171
1172         // activate the the parent menu only when there is no other child
1173         // that has been activated
1174         if ( hMenuParent && !hwndAct )
1175         {
1176             parent->m_parentFrameActive = true;
1177
1178             hMenuToSet = hMenuParent;
1179         }
1180     }
1181     else
1182     {
1183         // we have nothing to do with it
1184         return false;
1185     }
1186
1187     if ( hMenuToSet )
1188     {
1189         MDISetMenu(parent->GetClientWindow(),
1190                    (HMENU)hMenuToSet, GetMDIWindowMenu(parent));
1191     }
1192
1193     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1194     event.SetEventObject( this );
1195
1196     ResetWindowStyle(NULL);
1197
1198     return HandleWindowEvent(event);
1199 }
1200
1201 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1202 {
1203     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1204
1205     if (!(lpPos->flags & SWP_NOSIZE))
1206     {
1207         RECT rectClient;
1208         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1209         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1210         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1211         {
1212             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1213             lpPos->x = rectClient.left;
1214             lpPos->y = rectClient.top;
1215             lpPos->cx = rectClient.right - rectClient.left;
1216             lpPos->cy = rectClient.bottom - rectClient.top;
1217         }
1218     }
1219
1220     return false;
1221 }
1222
1223 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1224 {
1225     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1226
1227     // let the default window proc calculate the size of MDI children
1228     // frames because it is based on the size of the MDI client window,
1229     // not on the values specified in wxWindow m_max variables
1230     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1231
1232     int minWidth = GetMinWidth(),
1233         minHeight = GetMinHeight();
1234
1235     // but allow GetSizeHints() to set the min size
1236     if ( minWidth != wxDefaultCoord )
1237     {
1238         info->ptMinTrackSize.x = minWidth;
1239
1240         processed = true;
1241     }
1242
1243     if ( minHeight != wxDefaultCoord )
1244     {
1245         info->ptMinTrackSize.y = minHeight;
1246
1247         processed = true;
1248     }
1249
1250     return processed;
1251 }
1252
1253 // ---------------------------------------------------------------------------
1254 // MDI specific message translation/preprocessing
1255 // ---------------------------------------------------------------------------
1256
1257 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1258 {
1259     return DefMDIChildProc(GetHwnd(),
1260                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1261 }
1262
1263 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1264 {
1265     // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
1266     // doesn't do its job correctly for MDI child menus
1267     return MSWDoTranslateMessage(GetMDIParent(), msg);
1268 }
1269
1270 // ---------------------------------------------------------------------------
1271 // misc
1272 // ---------------------------------------------------------------------------
1273
1274 void wxMDIChildFrame::MSWDestroyWindow()
1275 {
1276     wxMDIParentFrame * const parent = GetMDIParent();
1277
1278     // Must make sure this handle is invalidated (set to NULL) since all sorts
1279     // of things could happen after the child client is destroyed, but before
1280     // the wxFrame is destroyed.
1281
1282     HWND oldHandle = (HWND)GetHWND();
1283     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1284                 (WPARAM)oldHandle, 0);
1285
1286     if (parent->GetActiveChild() == NULL)
1287         ResetWindowStyle(NULL);
1288
1289     if (m_hMenu)
1290     {
1291         ::DestroyMenu((HMENU) m_hMenu);
1292         m_hMenu = 0;
1293     }
1294     wxRemoveHandleAssociation(this);
1295     m_hWnd = 0;
1296 }
1297
1298 // Change the client window's extended style so we don't get a client edge
1299 // style when a child is maximised (a double border looks silly.)
1300 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1301 {
1302     RECT *rect = (RECT *)vrect;
1303     wxMDIParentFrame * const pFrameWnd = GetMDIParent();
1304     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1305
1306     if (!pChild || (pChild == this))
1307     {
1308         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1309         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1310
1311         // we want to test whether there is a maximized child, so just set
1312         // dwThisStyle to 0 if there is no child at all
1313         DWORD dwThisStyle = pChild
1314             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1315         DWORD dwNewStyle = dwStyle;
1316         if ( dwThisStyle & WS_MAXIMIZE )
1317             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1318         else
1319             dwNewStyle |= WS_EX_CLIENTEDGE;
1320
1321         if (dwStyle != dwNewStyle)
1322         {
1323             // force update of everything
1324             ::RedrawWindow(hwndClient, NULL, NULL,
1325                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1326             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1327             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1328                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1329                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1330                            SWP_NOCOPYBITS);
1331             if (rect)
1332                 ::GetClientRect(hwndClient, rect);
1333
1334             return true;
1335         }
1336     }
1337
1338     return false;
1339 }
1340
1341 // ===========================================================================
1342 // wxMDIClientWindow: the window of predefined (by Windows) class which
1343 // contains the child frames
1344 // ===========================================================================
1345
1346 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1347 {
1348     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1349
1350     CLIENTCREATESTRUCT ccs;
1351     m_windowStyle = style;
1352     m_parent = parent;
1353
1354     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1355     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1356
1357     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1358                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1359
1360     if ( style & wxHSCROLL )
1361         msStyle |= WS_HSCROLL;
1362     if ( style & wxVSCROLL )
1363         msStyle |= WS_VSCROLL;
1364
1365     DWORD exStyle = WS_EX_CLIENTEDGE;
1366
1367     wxWindowCreationHook hook(this);
1368     m_hWnd = (WXHWND)::CreateWindowEx
1369                        (
1370                         exStyle,
1371                         wxT("MDICLIENT"),
1372                         NULL,
1373                         msStyle,
1374                         0, 0, 0, 0,
1375                         GetWinHwnd(parent),
1376                         NULL,
1377                         wxGetInstance(),
1378                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1379     if ( !m_hWnd )
1380     {
1381         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1382
1383         return false;
1384     }
1385
1386     SubclassWin(m_hWnd);
1387
1388     return true;
1389 }
1390
1391 // Explicitly call default scroll behaviour
1392 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1393 {
1394     // Note: for client windows, the scroll position is not set in
1395     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1396     // scroll position we're at.
1397     // This makes it hard to paint patterns or bitmaps in the background,
1398     // and have the client area scrollable as well.
1399
1400     if ( event.GetOrientation() == wxHORIZONTAL )
1401         m_scrollX = event.GetPosition(); // Always returns zero!
1402     else
1403         m_scrollY = event.GetPosition(); // Always returns zero!
1404
1405     event.Skip();
1406 }
1407
1408 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1409 {
1410     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1411     // client area, you can end up with a non-refreshed portion in the client window
1412     // (see OGL studio sample). So check if the position is changed and if so,
1413     // redraw the MDI child frames.
1414
1415     const wxPoint oldPos = GetPosition();
1416
1417     wxWindow::DoSetSize(x, y, width, height, sizeFlags | wxSIZE_FORCE);
1418
1419     const wxPoint newPos = GetPosition();
1420
1421     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1422     {
1423         if (GetParent())
1424         {
1425             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1426             while (node)
1427             {
1428                 wxWindow *child = node->GetData();
1429                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1430                 {
1431                    ::RedrawWindow(GetHwndOf(child),
1432                                   NULL,
1433                                   NULL,
1434                                   RDW_FRAME |
1435                                   RDW_ALLCHILDREN |
1436                                   RDW_INVALIDATE);
1437                 }
1438                 node = node->GetNext();
1439             }
1440         }
1441     }
1442 }
1443
1444 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1445 {
1446     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1447     // in flicker e.g. when the frame contained controls with non-trivial
1448     // layout. Since 2.5.3, the frame is created hidden as all other top level
1449     // windows. In order to maintain backward compatibility, the frame is shown
1450     // in OnIdle, unless Show(false) was called by the programmer before.
1451     if ( m_needsInitialShow )
1452     {
1453         Show(true);
1454     }
1455
1456     // MDI child frames get their WM_SIZE when they're constructed but at this
1457     // moment they don't have any children yet so all child windows will be
1458     // positioned incorrectly when they are added later - to fix this, we
1459     // generate an artificial size event here
1460     if ( m_needsResize )
1461     {
1462         m_needsResize = false; // avoid any possibility of recursion
1463
1464         SendSizeEvent();
1465     }
1466
1467     event.Skip();
1468 }
1469
1470 // ---------------------------------------------------------------------------
1471 // non member functions
1472 // ---------------------------------------------------------------------------
1473
1474 static void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1475 {
1476     if ( hmenuFrame || hmenuWindow )
1477     {
1478         if ( !::SendMessage(GetWinHwnd(win),
1479                             WM_MDISETMENU,
1480                             (WPARAM)hmenuFrame,
1481                             (LPARAM)hmenuWindow) )
1482         {
1483 #ifdef __WXDEBUG__
1484             DWORD err = ::GetLastError();
1485             if ( err )
1486                 wxLogApiError(_T("SendMessage(WM_MDISETMENU)"), err);
1487 #endif // __WXDEBUG__
1488         }
1489     }
1490
1491     // update menu bar of the parent window
1492     wxWindow *parent = win->GetParent();
1493     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1494
1495     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1496
1497     ::DrawMenuBar(GetWinHwnd(parent));
1498 }
1499
1500 static void MDIInsertWindowMenu(wxWindow *win, WXHMENU menu, HMENU subMenu)
1501 {
1502     // Try to insert Window menu in front of Help, otherwise append it.
1503     HMENU hmenu = (HMENU)menu;
1504
1505     if (subMenu)
1506     {
1507         int N = GetMenuItemCount(hmenu);
1508         bool success = false;
1509         for ( int i = 0; i < N; i++ )
1510         {
1511             wxChar buf[256];
1512             int chars = GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION);
1513             if ( chars == 0 )
1514             {
1515                 wxLogLastError(wxT("GetMenuString"));
1516
1517                 continue;
1518             }
1519
1520             wxString strBuf(buf);
1521             if ( wxStripMenuCodes(strBuf) == wxGetStockLabel(wxID_HELP,false) )
1522             {
1523                 success = true;
1524                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1525                              (UINT_PTR)subMenu, _("&Window").wx_str());
1526                 break;
1527             }
1528         }
1529
1530         if ( !success )
1531         {
1532             ::AppendMenu(hmenu, MF_POPUP,
1533                          (UINT_PTR)subMenu, _("&Window").wx_str());
1534         }
1535     }
1536
1537     MDISetMenu(win, hmenu, subMenu);
1538 }
1539
1540 static void MDIRemoveWindowMenu(wxWindow *win, WXHMENU menu)
1541 {
1542     HMENU hMenu = (HMENU)menu;
1543
1544     if ( hMenu )
1545     {
1546         wxChar buf[1024];
1547
1548         int N = ::GetMenuItemCount(hMenu);
1549         for ( int i = 0; i < N; i++ )
1550         {
1551             if ( !::GetMenuString(hMenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1552             {
1553                 // Ignore successful read of menu string with length 0 which
1554                 // occurs, for example, for a maximized MDI childs system menu
1555                 if ( ::GetLastError() != 0 )
1556                 {
1557                     wxLogLastError(wxT("GetMenuString"));
1558                 }
1559
1560                 continue;
1561             }
1562
1563             if ( wxStrcmp(buf, _("&Window")) == 0 )
1564             {
1565                 if ( !::RemoveMenu(hMenu, i, MF_BYPOSITION) )
1566                 {
1567                     wxLogLastError(wxT("RemoveMenu"));
1568                 }
1569
1570                 break;
1571             }
1572         }
1573     }
1574
1575     if ( win )
1576     {
1577         // we don't change the windows menu, but we update the main one
1578         MDISetMenu(win, hMenu, NULL);
1579     }
1580 }
1581
1582 static void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1583                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1584 {
1585     *activate = true;
1586     *hwndAct = (WXHWND)lParam;
1587     *hwndDeact = (WXHWND)wParam;
1588 }
1589
1590 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)