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