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     // We must look in the child menu first: if it has an item with the same ID
 432     // as in our own menu bar, the child item should be used to determine
 433     // whether it's currently enabled.
 434     wxMenuItem *item = GetActiveChild()
 435                             ? GetActiveChild()->FindItemInMenuBar(menuId)
 436                             : NULL;
 437     if ( !item )
 438         item = wxFrame::FindItemInMenuBar(menuId);
 439
 440     if ( !item && m_windowMenu )
 441         item = m_windowMenu->FindItem(menuId);
 442
 443     return item;
 444 }
 445
 446 WXHMENU wxMDIParentFrame::MSWGetActiveMenu() const
 447 {
 448     wxMDIChildFrame * const child  = GetActiveChild();
 449     if ( child )
 450     {
 451         const WXHMENU hmenu = child->MSWGetActiveMenu();
 452         if ( hmenu )
 453             return hmenu;
 454     }
 455
 456     return wxFrame::MSWGetActiveMenu();
 457 }
 458
 459 #endif // wxUSE_MENUS
 460
 461 // ----------------------------------------------------------------------------
 462 // wxMDIParentFrame event handling
 463 // ----------------------------------------------------------------------------
 464
 465 void wxMDIParentFrame::UpdateClientSize()
 466 {
 467     if ( GetClientWindow() )
 468     {
 469         int width, height;
 470         GetClientSize(&width, &height);
 471
 472         GetClientWindow()->SetSize(0, 0, width, height);
 473     }
 474 }
 475
 476 void wxMDIParentFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 477 {
 478     UpdateClientSize();
 479
 480     // do not call event.Skip() here, it somehow messes up MDI client window
 481 }
 482
 483 void wxMDIParentFrame::OnIconized(wxIconizeEvent& event)
 484 {
 485     event.Skip();
 486
 487     if ( !event.IsIconized() )
 488         UpdateClientSize();
 489 }
 490
 491 // Responds to colour changes, and passes event on to children.
 492 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 493 {
 494     if ( m_clientWindow )
 495     {
 496         m_clientWindow->SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE));
 497         m_clientWindow->Refresh();
 498     }
 499
 500     event.Skip();
 501 }
 502
 503 WXHICON wxMDIParentFrame::GetDefaultIcon() const
 504 {
 505     // we don't have any standard icons (any more)
 506     return (WXHICON)0;
 507 }
 508
 509 // ---------------------------------------------------------------------------
 510 // MDI operations
 511 // ---------------------------------------------------------------------------
 512
 513 void wxMDIParentFrame::Cascade()
 514 {
 515     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 516 }
 517
 518 void wxMDIParentFrame::Tile(wxOrientation orient)
 519 {
 520     wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
 521                   wxT("invalid orientation value") );
 522
 523     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
 524                   orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
 525                                          : MDITILE_VERTICAL, 0);
 526 }
 527
 528 void wxMDIParentFrame::ArrangeIcons()
 529 {
 530     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDIICONARRANGE, 0, 0);
 531 }
 532
 533 void wxMDIParentFrame::ActivateNext()
 534 {
 535     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 0);
 536 }
 537
 538 void wxMDIParentFrame::ActivatePrevious()
 539 {
 540     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDINEXT, 0, 1);
 541 }
 542
 543 // ---------------------------------------------------------------------------
 544 // the MDI parent frame window proc
 545 // ---------------------------------------------------------------------------
 546
 547 WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
 548                                           WXWPARAM wParam,
 549                                           WXLPARAM lParam)
 550 {
 551     WXLRESULT rc = 0;
 552     bool processed = false;
 553
 554     switch ( message )
 555     {
 556         case WM_ACTIVATE:
 557             {
 558                 WXWORD state, minimized;
 559                 WXHWND hwnd;
 560                 UnpackActivate(wParam, lParam, &state, &minimized, &hwnd);
 561
 562                 processed = HandleActivate(state, minimized != 0, hwnd);
 563             }
 564             break;
 565
 566         case WM_COMMAND:
 567             // system messages such as SC_CLOSE are sent as WM_COMMANDs to the
 568             // parent MDI frame and we must let the DefFrameProc() have them
 569             // for these commands to work (without it, closing the maximized
 570             // MDI children doesn't work, for example)
 571             {
 572                 WXWORD id, cmd;
 573                 WXHWND hwnd;
 574                 UnpackCommand(wParam, lParam, &id, &hwnd, &cmd);
 575
 576                 if ( id == wxID_MDI_MORE_WINDOWS ||
 577                      (cmd == 0 /* menu */ &&
 578                         id >= SC_SIZE /* first system menu command */) )
 579                 {
 580                     MSWDefWindowProc(message, wParam, lParam);
 581                     processed = true;
 582                 }
 583             }
 584             break;
 585
 586         case WM_CREATE:
 587             m_clientWindow = OnCreateClient();
 588             // Uses own style for client style
 589             if ( !m_clientWindow->CreateClient(this, GetWindowStyleFlag()) )
 590             {
 591                 wxLogMessage(_("Failed to create MDI parent frame."));
 592
 593                 rc = -1;
 594             }
 595
 596             processed = true;
 597             break;
 598     }
 599
 600     if ( !processed )
 601         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
 602
 603     return rc;
 604 }
 605
 606 bool wxMDIParentFrame::HandleActivate(int state, bool minimized, WXHWND activate)
 607 {
 608     bool processed = false;
 609
 610     if ( wxWindow::HandleActivate(state, minimized, activate) )
 611     {
 612         // already processed
 613         processed = true;
 614     }
 615
 616     // If this window is an MDI parent, we must also send an OnActivate message
 617     // to the current child.
 618     if ( GetActiveChild() &&
 619          ((state == WA_ACTIVE) || (state == WA_CLICKACTIVE)) )
 620     {
 621         wxActivateEvent event(wxEVT_ACTIVATE, true, GetActiveChild()->GetId());
 622         event.SetEventObject( GetActiveChild() );
 623         if ( GetActiveChild()->HandleWindowEvent(event) )
 624             processed = true;
 625     }
 626
 627     return processed;
 628 }
 629
 630 #if wxUSE_MENUS
 631
 632 void wxMDIParentFrame::OnMDIChild(wxCommandEvent& event)
 633 {
 634     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 635     while ( node )
 636     {
 637         wxWindow *child = node->GetData();
 638         if ( child->GetHWND() )
 639         {
 640             int childId = wxGetWindowId(child->GetHWND());
 641             if ( childId == event.GetId() )
 642             {
 643                 wxStaticCast(child, wxMDIChildFrame)->Activate();
 644                 return;
 645             }
 646         }
 647
 648         node = node->GetNext();
 649     }
 650
 651     wxFAIL_MSG( "unknown MDI child selected?" );
 652 }
 653
 654 void wxMDIParentFrame::OnMDICommand(wxCommandEvent& event)
 655 {
 656     WXWPARAM wParam = 0;
 657     WXLPARAM lParam = 0;
 658     int msg;
 659     switch ( event.GetId() )
 660     {
 661         case wxID_MDI_WINDOW_CASCADE:
 662             msg = WM_MDICASCADE;
 663             wParam = MDITILE_SKIPDISABLED;
 664             break;
 665
 666         case wxID_MDI_WINDOW_TILE_HORZ:
 667             wParam |= MDITILE_HORIZONTAL;
 668             // fall through
 669
 670         case wxID_MDI_WINDOW_TILE_VERT:
 671             if ( !wParam )
 672                 wParam = MDITILE_VERTICAL;
 673             msg = WM_MDITILE;
 674             wParam |= MDITILE_SKIPDISABLED;
 675             break;
 676
 677         case wxID_MDI_WINDOW_ARRANGE_ICONS:
 678             msg = WM_MDIICONARRANGE;
 679             break;
 680
 681         case wxID_MDI_WINDOW_NEXT:
 682             msg = WM_MDINEXT;
 683             lParam = 0;         // next child
 684             break;
 685
 686         case wxID_MDI_WINDOW_PREV:
 687             msg = WM_MDINEXT;
 688             lParam = 1;         // previous child
 689             break;
 690
 691         default:
 692             wxFAIL_MSG( "unknown MDI command" );
 693             return;
 694     }
 695
 696     ::SendMessage(GetWinHwnd(GetClientWindow()), msg, wParam, lParam);
 697 }
 698
 699 #endif // wxUSE_MENUS
 700
 701 WXLRESULT wxMDIParentFrame::MSWDefWindowProc(WXUINT message,
 702                                         WXWPARAM wParam,
 703                                         WXLPARAM lParam)
 704 {
 705     WXHWND clientWnd;
 706     if ( GetClientWindow() )
 707         clientWnd = GetClientWindow()->GetHWND();
 708     else
 709         clientWnd = 0;
 710
 711     return DefFrameProc(GetHwnd(), (HWND)clientWnd, message, wParam, lParam);
 712 }
 713
 714 bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 715 {
 716     MSG *pMsg = (MSG *)msg;
 717
 718     // first let the current child get it
 719     wxMDIChildFrame * const child = GetActiveChild();
 720     if ( child && child->MSWTranslateMessage(msg) )
 721     {
 722         return true;
 723     }
 724
 725     // then try out accelerator table (will also check the accelerators for the
 726     // normal menu items)
 727     if ( wxFrame::MSWTranslateMessage(msg) )
 728     {
 729         return true;
 730     }
 731
 732 #if wxUSE_MENUS && wxUSE_ACCEL
 733     // but it doesn't check for the (custom) accelerators of the window menu
 734     // items as it's not part of the menu bar as it's handled by Windows itself
 735     // so we need to do this explicitly
 736     if ( m_accelWindowMenu && m_accelWindowMenu->Translate(this, msg) )
 737         return true;
 738 #endif // wxUSE_MENUS && wxUSE_ACCEL
 739
 740     // finally, check for MDI specific built-in accelerators
 741     if ( pMsg->message == WM_KEYDOWN || pMsg->message == WM_SYSKEYDOWN )
 742     {
 743         if ( ::TranslateMDISysAccel(GetWinHwnd(GetClientWindow()), pMsg))
 744             return true;
 745     }
 746
 747     return false;
 748 }
 749
 750 // ===========================================================================
 751 // wxMDIChildFrame
 752 // ===========================================================================
 753
 754 void wxMDIChildFrame::Init()
 755 {
 756     m_needsResize = true;
 757     m_needsInitialShow = true;
 758 }
 759
 760 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 761                              wxWindowID id,
 762                              const wxString& title,
 763                              const wxPoint& pos,
 764                              const wxSize& size,
 765                              long style,
 766                              const wxString& name)
 767 {
 768     m_mdiParent = parent;
 769
 770   SetName(name);
 771
 772   if ( id != wxID_ANY )
 773     m_windowId = id;
 774   else
 775     m_windowId = NewControlId();
 776
 777   if ( parent )
 778   {
 779       parent->AddChild(this);
 780   }
 781
 782   int x = pos.x;
 783   int y = pos.y;
 784   int width = size.x;
 785   int height = size.y;
 786
 787   MDICREATESTRUCT mcs;
 788
 789   wxString className =
 790       wxApp::GetRegisteredClassName(wxT("wxMDIChildFrame"), COLOR_WINDOW);
 791   if ( !(style & wxFULL_REPAINT_ON_RESIZE) )
 792       className += wxApp::GetNoRedrawClassSuffix();
 793
 794   mcs.szClass = className.t_str();
 795   mcs.szTitle = title.t_str();
 796   mcs.hOwner = wxGetInstance();
 797   if (x != wxDefaultCoord)
 798       mcs.x = x;
 799   else
 800       mcs.x = CW_USEDEFAULT;
 801
 802   if (y != wxDefaultCoord)
 803       mcs.y = y;
 804   else
 805       mcs.y = CW_USEDEFAULT;
 806
 807   if (width != wxDefaultCoord)
 808       mcs.cx = width;
 809   else
 810       mcs.cx = CW_USEDEFAULT;
 811
 812   if (height != wxDefaultCoord)
 813       mcs.cy = height;
 814   else
 815       mcs.cy = CW_USEDEFAULT;
 816
 817   DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
 818   if (style & wxMINIMIZE_BOX)
 819     msflags |= WS_MINIMIZEBOX;
 820   if (style & wxMAXIMIZE_BOX)
 821     msflags |= WS_MAXIMIZEBOX;
 822   if (style & wxRESIZE_BORDER)
 823     msflags |= WS_THICKFRAME;
 824   if (style & wxSYSTEM_MENU)
 825     msflags |= WS_SYSMENU;
 826   if ((style & wxMINIMIZE) || (style & wxICONIZE))
 827     msflags |= WS_MINIMIZE;
 828   if (style & wxMAXIMIZE)
 829     msflags |= WS_MAXIMIZE;
 830   if (style & wxCAPTION)
 831     msflags |= WS_CAPTION;
 832
 833   mcs.style = msflags;
 834
 835   mcs.lParam = 0;
 836
 837   wxWindowCreationHook hook(this);
 838
 839   m_hWnd = (WXHWND)::SendMessage(GetWinHwnd(parent->GetClientWindow()),
 840                                  WM_MDICREATE, 0, (LPARAM)&mcs);
 841
 842   if ( !m_hWnd )
 843   {
 844       wxLogLastError(wxT("WM_MDICREATE"));
 845       return false;
 846   }
 847
 848   SubclassWin(m_hWnd);
 849
 850   parent->AddMDIChild(this);
 851
 852   return true;
 853 }
 854
 855 wxMDIChildFrame::~wxMDIChildFrame()
 856 {
 857     // if we hadn't been created, there is nothing to destroy
 858     if ( !m_hWnd )
 859         return;
 860
 861     GetMDIParent()->RemoveMDIChild(this);
 862
 863     // will be destroyed by DestroyChildren() but reset them before calling it
 864     // to avoid using dangling pointers if a callback comes in the meanwhile
 865 #if wxUSE_TOOLBAR
 866     m_frameToolBar = NULL;
 867 #endif
 868 #if wxUSE_STATUSBAR
 869     m_frameStatusBar = NULL;
 870 #endif // wxUSE_STATUSBAR
 871
 872     DestroyChildren();
 873
 874     MDIRemoveWindowMenu(NULL, m_hMenu);
 875
 876     MSWDestroyWindow();
 877 }
 878
 879 bool wxMDIChildFrame::Show(bool show)
 880 {
 881     m_needsInitialShow = false;
 882
 883     if (!wxFrame::Show(show))
 884         return false;
 885
 886     // KH: Without this call, new MDI children do not become active.
 887     // This was added here after the same BringWindowToTop call was
 888     // removed from wxTopLevelWindow::Show (November 2005)
 889     if ( show )
 890         ::BringWindowToTop(GetHwnd());
 891
 892     // we need to refresh the MDI frame window menu to include (or exclude if
 893     // we've been hidden) this frame
 894     wxMDIParentFrame * const parent = GetMDIParent();
 895     MDISetMenu(parent->GetClientWindow(), NULL, NULL);
 896
 897     return true;
 898 }
 899
 900 void
 901 wxMDIChildFrame::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 902 {
 903     // we need to disable client area origin adjustments used for the child
 904     // windows for the frame itself
 905     wxMDIChildFrameBase::DoSetSize(x, y, width, height, sizeFlags);
 906 }
 907
 908 // Set the client size (i.e. leave the calculation of borders etc.
 909 // to wxWidgets)
 910 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 911 {
 912   HWND hWnd = GetHwnd();
 913
 914   RECT rect;
 915   ::GetClientRect(hWnd, &rect);
 916
 917   RECT rect2;
 918   GetWindowRect(hWnd, &rect2);
 919
 920   // Find the difference between the entire window (title bar and all)
 921   // and the client area; add this to the new client size to move the
 922   // window
 923   int actual_width = rect2.right - rect2.left - rect.right + width;
 924   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 925
 926 #if wxUSE_STATUSBAR
 927   if (GetStatusBar() && GetStatusBar()->IsShown())
 928   {
 929     int sx, sy;
 930     GetStatusBar()->GetSize(&sx, &sy);
 931     actual_height += sy;
 932   }
 933 #endif // wxUSE_STATUSBAR
 934
 935   POINT point;
 936   point.x = rect2.left;
 937   point.y = rect2.top;
 938
 939   // If there's an MDI parent, must subtract the parent's top left corner
 940   // since MoveWindow moves relative to the parent
 941   wxMDIParentFrame * const mdiParent = GetMDIParent();
 942   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 943
 944   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 945
 946   wxSize size(width, height);
 947   wxSizeEvent event(size, m_windowId);
 948   event.SetEventObject( this );
 949   HandleWindowEvent(event);
 950 }
 951
 952 // Unlike other wxTopLevelWindowBase, the mdi child's "GetPosition" is not the
 953 //  same as its GetScreenPosition
 954 void wxMDIChildFrame::DoGetScreenPosition(int *x, int *y) const
 955 {
 956   HWND hWnd = GetHwnd();
 957
 958   RECT rect;
 959   ::GetWindowRect(hWnd, &rect);
 960   if (x)
 961      *x = rect.left;
 962   if (y)
 963      *y = rect.top;
 964 }
 965
 966
 967 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 968 {
 969   RECT rect;
 970   GetWindowRect(GetHwnd(), &rect);
 971   POINT point;
 972   point.x = rect.left;
 973   point.y = rect.top;
 974
 975   // Since we now have the absolute screen coords,
 976   // if there's a parent we must subtract its top left corner
 977   wxMDIParentFrame * const mdiParent = GetMDIParent();
 978   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 979
 980   if (x)
 981       *x = point.x;
 982   if (y)
 983       *y = point.y;
 984 }
 985
 986 void wxMDIChildFrame::InternalSetMenuBar()
 987 {
 988     wxMDIParentFrame * const parent = GetMDIParent();
 989
 990     MDIInsertWindowMenu(parent->GetClientWindow(),
 991                      m_hMenu, GetMDIWindowMenu(parent));
 992 }
 993
 994 void wxMDIChildFrame::DetachMenuBar()
 995 {
 996     MDIRemoveWindowMenu(NULL, m_hMenu);
 997     wxFrame::DetachMenuBar();
 998 }
 999
1000 WXHICON wxMDIChildFrame::GetDefaultIcon() const
1001 {
1002     // we don't have any standard icons (any more)
1003     return (WXHICON)0;
1004 }
1005
1006 // ---------------------------------------------------------------------------
1007 // MDI operations
1008 // ---------------------------------------------------------------------------
1009
1010 void wxMDIChildFrame::Maximize(bool maximize)
1011 {
1012     wxMDIParentFrame * const parent = GetMDIParent();
1013     if ( parent && parent->GetClientWindow() )
1014     {
1015         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
1016                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
1017                       (WPARAM)GetHwnd(), 0);
1018     }
1019 }
1020
1021 void wxMDIChildFrame::Restore()
1022 {
1023     wxMDIParentFrame * const parent = GetMDIParent();
1024     if ( parent && parent->GetClientWindow() )
1025     {
1026         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
1027                       (WPARAM) GetHwnd(), 0);
1028     }
1029 }
1030
1031 void wxMDIChildFrame::Activate()
1032 {
1033     wxMDIParentFrame * const parent = GetMDIParent();
1034     if ( parent && parent->GetClientWindow() )
1035     {
1036         // Activating an iconized MDI frame doesn't do anything, so restore it
1037         // first to really present it to the user.
1038         if ( IsIconized() )
1039             Restore();
1040
1041         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
1042                       (WPARAM) GetHwnd(), 0);
1043     }
1044 }
1045
1046 // ---------------------------------------------------------------------------
1047 // MDI window proc and message handlers
1048 // ---------------------------------------------------------------------------
1049
1050 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
1051                                          WXWPARAM wParam,
1052                                          WXLPARAM lParam)
1053 {
1054     WXLRESULT rc = 0;
1055     bool processed = false;
1056
1057     switch ( message )
1058     {
1059         case WM_GETMINMAXINFO:
1060             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
1061             break;
1062
1063         case WM_MDIACTIVATE:
1064             {
1065                 WXWORD act;
1066                 WXHWND hwndAct, hwndDeact;
1067                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
1068
1069                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
1070             }
1071             // fall through
1072
1073         case WM_MOVE:
1074             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
1075             // scrollbars if necessary
1076
1077             // fall through
1078
1079         case WM_SIZE:
1080             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
1081             // things happen
1082             MSWDefWindowProc(message, wParam, lParam);
1083             break;
1084
1085         case WM_WINDOWPOSCHANGING:
1086             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
1087             break;
1088     }
1089
1090     if ( !processed )
1091         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
1092
1093     return rc;
1094 }
1095
1096 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
1097                                         WXHWND hwndAct,
1098                                         WXHWND hwndDeact)
1099 {
1100     wxMDIParentFrame * const parent = GetMDIParent();
1101
1102     WXHMENU hMenuToSet = 0;
1103
1104     bool activated;
1105
1106     if ( m_hWnd == hwndAct )
1107     {
1108         activated = true;
1109         parent->SetActiveChild(this);
1110
1111         WXHMENU hMenuChild = m_hMenu;
1112         if ( hMenuChild )
1113             hMenuToSet = hMenuChild;
1114     }
1115     else if ( m_hWnd == hwndDeact )
1116     {
1117         wxASSERT_MSG( parent->GetActiveChild() == this,
1118                       wxT("can't deactivate MDI child which wasn't active!") );
1119
1120         activated = false;
1121         parent->SetActiveChild(NULL);
1122
1123         WXHMENU hMenuParent = parent->m_hMenu;
1124
1125         // activate the parent menu only when there is no other child
1126         // that has been activated
1127         if ( hMenuParent && !hwndAct )
1128             hMenuToSet = hMenuParent;
1129     }
1130     else
1131     {
1132         // we have nothing to do with it
1133         return false;
1134     }
1135
1136     if ( hMenuToSet )
1137     {
1138         MDISetMenu(parent->GetClientWindow(),
1139                    (HMENU)hMenuToSet, GetMDIWindowMenu(parent));
1140     }
1141
1142     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1143     event.SetEventObject( this );
1144
1145     ResetWindowStyle(NULL);
1146
1147     return HandleWindowEvent(event);
1148 }
1149
1150 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1151 {
1152     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1153
1154     if (!(lpPos->flags & SWP_NOSIZE))
1155     {
1156         RECT rectClient;
1157         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1158         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1159         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1160         {
1161             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1162             lpPos->x = rectClient.left;
1163             lpPos->y = rectClient.top;
1164             lpPos->cx = rectClient.right - rectClient.left;
1165             lpPos->cy = rectClient.bottom - rectClient.top;
1166         }
1167     }
1168
1169     return false;
1170 }
1171
1172 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1173 {
1174     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1175
1176     // let the default window proc calculate the size of MDI children
1177     // frames because it is based on the size of the MDI client window,
1178     // not on the values specified in wxWindow m_max variables
1179     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1180
1181     int minWidth = GetMinWidth(),
1182         minHeight = GetMinHeight();
1183
1184     // but allow GetSizeHints() to set the min size
1185     if ( minWidth != wxDefaultCoord )
1186     {
1187         info->ptMinTrackSize.x = minWidth;
1188
1189         processed = true;
1190     }
1191
1192     if ( minHeight != wxDefaultCoord )
1193     {
1194         info->ptMinTrackSize.y = minHeight;
1195
1196         processed = true;
1197     }
1198
1199     return processed;
1200 }
1201
1202 // ---------------------------------------------------------------------------
1203 // MDI specific message translation/preprocessing
1204 // ---------------------------------------------------------------------------
1205
1206 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1207 {
1208     return DefMDIChildProc(GetHwnd(),
1209                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1210 }
1211
1212 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1213 {
1214     // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
1215     // doesn't do its job correctly for MDI child menus
1216     return MSWDoTranslateMessage(GetMDIParent(), msg);
1217 }
1218
1219 // ---------------------------------------------------------------------------
1220 // misc
1221 // ---------------------------------------------------------------------------
1222
1223 void wxMDIChildFrame::MSWDestroyWindow()
1224 {
1225     wxMDIParentFrame * const parent = GetMDIParent();
1226
1227     // Must make sure this handle is invalidated (set to NULL) since all sorts
1228     // of things could happen after the child client is destroyed, but before
1229     // the wxFrame is destroyed.
1230
1231     HWND oldHandle = (HWND)GetHWND();
1232     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1233                 (WPARAM)oldHandle, 0);
1234
1235     if (parent->GetActiveChild() == NULL)
1236         ResetWindowStyle(NULL);
1237
1238     if (m_hMenu)
1239     {
1240         ::DestroyMenu((HMENU) m_hMenu);
1241         m_hMenu = 0;
1242     }
1243     wxRemoveHandleAssociation(this);
1244     m_hWnd = 0;
1245 }
1246
1247 // Change the client window's extended style so we don't get a client edge
1248 // style when a child is maximised (a double border looks silly.)
1249 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1250 {
1251     RECT *rect = (RECT *)vrect;
1252     wxMDIParentFrame * const pFrameWnd = GetMDIParent();
1253     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1254
1255     if (!pChild || (pChild == this))
1256     {
1257         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1258         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1259
1260         // we want to test whether there is a maximized child, so just set
1261         // dwThisStyle to 0 if there is no child at all
1262         DWORD dwThisStyle = pChild
1263             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1264         DWORD dwNewStyle = dwStyle;
1265         if ( dwThisStyle & WS_MAXIMIZE )
1266             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1267         else
1268             dwNewStyle |= WS_EX_CLIENTEDGE;
1269
1270         if (dwStyle != dwNewStyle)
1271         {
1272             // force update of everything
1273             ::RedrawWindow(hwndClient, NULL, NULL,
1274                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1275             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1276             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1277                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1278                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1279                            SWP_NOCOPYBITS);
1280             if (rect)
1281                 ::GetClientRect(hwndClient, rect);
1282
1283             return true;
1284         }
1285     }
1286
1287     return false;
1288 }
1289
1290 // ===========================================================================
1291 // wxMDIClientWindow: the window of predefined (by Windows) class which
1292 // contains the child frames
1293 // ===========================================================================
1294
1295 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1296 {
1297     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1298
1299     CLIENTCREATESTRUCT ccs;
1300     m_windowStyle = style;
1301     m_parent = parent;
1302
1303     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1304     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1305
1306     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1307                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1308
1309     if ( style & wxHSCROLL )
1310         msStyle |= WS_HSCROLL;
1311     if ( style & wxVSCROLL )
1312         msStyle |= WS_VSCROLL;
1313
1314     DWORD exStyle = WS_EX_CLIENTEDGE;
1315
1316     wxWindowCreationHook hook(this);
1317     m_hWnd = (WXHWND)::CreateWindowEx
1318                        (
1319                         exStyle,
1320                         wxT("MDICLIENT"),
1321                         NULL,
1322                         msStyle,
1323                         0, 0, 0, 0,
1324                         GetWinHwnd(parent),
1325                         NULL,
1326                         wxGetInstance(),
1327                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1328     if ( !m_hWnd )
1329     {
1330         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1331
1332         return false;
1333     }
1334
1335     SubclassWin(m_hWnd);
1336
1337     return true;
1338 }
1339
1340 // Explicitly call default scroll behaviour
1341 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1342 {
1343     // Note: for client windows, the scroll position is not set in
1344     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1345     // scroll position we're at.
1346     // This makes it hard to paint patterns or bitmaps in the background,
1347     // and have the client area scrollable as well.
1348
1349     if ( event.GetOrientation() == wxHORIZONTAL )
1350         m_scrollX = event.GetPosition(); // Always returns zero!
1351     else
1352         m_scrollY = event.GetPosition(); // Always returns zero!
1353
1354     event.Skip();
1355 }
1356
1357 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1358 {
1359     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1360     // client area, you can end up with a non-refreshed portion in the client window
1361     // (see OGL studio sample). So check if the position is changed and if so,
1362     // redraw the MDI child frames.
1363
1364     const wxPoint oldPos = GetPosition();
1365
1366     wxWindow::DoSetSize(x, y, width, height, sizeFlags | wxSIZE_FORCE);
1367
1368     const wxPoint newPos = GetPosition();
1369
1370     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1371     {
1372         if (GetParent())
1373         {
1374             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1375             while (node)
1376             {
1377                 wxWindow *child = node->GetData();
1378                 if (wxDynamicCast(child, wxMDIChildFrame))
1379                 {
1380                    ::RedrawWindow(GetHwndOf(child),
1381                                   NULL,
1382                                   NULL,
1383                                   RDW_FRAME |
1384                                   RDW_ALLCHILDREN |
1385                                   RDW_INVALIDATE);
1386                 }
1387                 node = node->GetNext();
1388             }
1389         }
1390     }
1391 }
1392
1393 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1394 {
1395     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1396     // in flicker e.g. when the frame contained controls with non-trivial
1397     // layout. Since 2.5.3, the frame is created hidden as all other top level
1398     // windows. In order to maintain backward compatibility, the frame is shown
1399     // in OnIdle, unless Show(false) was called by the programmer before.
1400     if ( m_needsInitialShow )
1401     {
1402         Show(true);
1403     }
1404
1405     // MDI child frames get their WM_SIZE when they're constructed but at this
1406     // moment they don't have any children yet so all child windows will be
1407     // positioned incorrectly when they are added later - to fix this, we
1408     // generate an artificial size event here
1409     if ( m_needsResize )
1410     {
1411         m_needsResize = false; // avoid any possibility of recursion
1412
1413         SendSizeEvent();
1414     }
1415
1416     event.Skip();
1417 }
1418
1419 // ---------------------------------------------------------------------------
1420 // private helper functions
1421 // ---------------------------------------------------------------------------
1422
1423 namespace
1424 {
1425
1426 void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1427 {
1428     if ( hmenuFrame || hmenuWindow )
1429     {
1430         if ( !::SendMessage(GetWinHwnd(win),
1431                             WM_MDISETMENU,
1432                             (WPARAM)hmenuFrame,
1433                             (LPARAM)hmenuWindow) )
1434         {
1435             DWORD err = ::GetLastError();
1436             if ( err )
1437             {
1438                 wxLogApiError(wxT("SendMessage(WM_MDISETMENU)"), err);
1439             }
1440         }
1441     }
1442
1443     // update menu bar of the parent window
1444     wxWindow *parent = win->GetParent();
1445     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1446
1447     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1448
1449     ::DrawMenuBar(GetWinHwnd(parent));
1450 }
1451
1452 void MDIInsertWindowMenu(wxWindow *win, WXHMENU hMenu, HMENU menuWin)
1453 {
1454     HMENU hmenu = (HMENU)hMenu;
1455
1456     if ( menuWin )
1457     {
1458         // Try to insert Window menu in front of Help, otherwise append it.
1459         int N = GetMenuItemCount(hmenu);
1460         bool inserted = false;
1461         for ( int i = 0; i < N; i++ )
1462         {
1463             wxChar buf[256];
1464             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1465             {
1466                 wxLogLastError(wxT("GetMenuString"));
1467
1468                 continue;
1469             }
1470
1471             const wxString label = wxStripMenuCodes(buf);
1472             if ( label == wxGetStockLabel(wxID_HELP, wxSTOCK_NOFLAGS) )
1473             {
1474                 inserted = true;
1475                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1476                              (UINT_PTR)menuWin,
1477                              wxString(wxGetTranslation(WINDOW_MENU_LABEL)).t_str());
1478                 break;
1479             }
1480         }
1481
1482         if ( !inserted )
1483         {
1484             ::AppendMenu(hmenu, MF_POPUP,
1485                          (UINT_PTR)menuWin,
1486                          wxString(wxGetTranslation(WINDOW_MENU_LABEL)).t_str());
1487         }
1488     }
1489
1490     MDISetMenu(win, hmenu, menuWin);
1491 }
1492
1493 void MDIRemoveWindowMenu(wxWindow *win, WXHMENU hMenu)
1494 {
1495     HMENU hmenu = (HMENU)hMenu;
1496
1497     if ( hmenu )
1498     {
1499         wxChar buf[1024];
1500
1501         int N = ::GetMenuItemCount(hmenu);
1502         for ( int i = 0; i < N; i++ )
1503         {
1504             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1505             {
1506                 // Ignore successful read of menu string with length 0 which
1507                 // occurs, for example, for a maximized MDI child system menu
1508                 if ( ::GetLastError() != 0 )
1509                 {
1510                     wxLogLastError(wxT("GetMenuString"));
1511                 }
1512
1513                 continue;
1514             }
1515
1516             if ( wxStrcmp(buf, wxGetTranslation(WINDOW_MENU_LABEL)) == 0 )
1517             {
1518                 if ( !::RemoveMenu(hmenu, i, MF_BYPOSITION) )
1519                 {
1520                     wxLogLastError(wxT("RemoveMenu"));
1521                 }
1522
1523                 break;
1524             }
1525         }
1526     }
1527
1528     if ( win )
1529     {
1530         // we don't change the windows menu, but we update the main one
1531         MDISetMenu(win, hmenu, NULL);
1532     }
1533 }
1534
1535 void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1536                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1537 {
1538     *activate = true;
1539     *hwndAct = (WXHWND)lParam;
1540     *hwndDeact = (WXHWND)wParam;
1541 }
1542
1543 } // anonymous namespace
1544
1545 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)