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