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