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(wxT("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                   wxT("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(wxT("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(wxT("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 void
 906 wxMDIChildFrame::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 907 {
 908     // we need to disable client area origin adjustments used for the child
 909     // windows for the frame itself
 910     wxMDIChildFrameBase::DoSetSize(x, y, width, height, sizeFlags);
 911 }
 912
 913 // Set the client size (i.e. leave the calculation of borders etc.
 914 // to wxWidgets)
 915 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 916 {
 917   HWND hWnd = GetHwnd();
 918
 919   RECT rect;
 920   ::GetClientRect(hWnd, &rect);
 921
 922   RECT rect2;
 923   GetWindowRect(hWnd, &rect2);
 924
 925   // Find the difference between the entire window (title bar and all)
 926   // and the client area; add this to the new client size to move the
 927   // window
 928   int actual_width = rect2.right - rect2.left - rect.right + width;
 929   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 930
 931 #if wxUSE_STATUSBAR
 932   if (GetStatusBar() && GetStatusBar()->IsShown())
 933   {
 934     int sx, sy;
 935     GetStatusBar()->GetSize(&sx, &sy);
 936     actual_height += sy;
 937   }
 938 #endif // wxUSE_STATUSBAR
 939
 940   POINT point;
 941   point.x = rect2.left;
 942   point.y = rect2.top;
 943
 944   // If there's an MDI parent, must subtract the parent's top left corner
 945   // since MoveWindow moves relative to the parent
 946   wxMDIParentFrame * const mdiParent = GetMDIParent();
 947   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 948
 949   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 950
 951   wxSize size(width, height);
 952   wxSizeEvent event(size, m_windowId);
 953   event.SetEventObject( this );
 954   HandleWindowEvent(event);
 955 }
 956
 957 // Unlike other wxTopLevelWindowBase, the mdi child's "GetPosition" is not the
 958 //  same as its GetScreenPosition
 959 void wxMDIChildFrame::DoGetScreenPosition(int *x, int *y) const
 960 {
 961   HWND hWnd = GetHwnd();
 962
 963   RECT rect;
 964   ::GetWindowRect(hWnd, &rect);
 965   if (x)
 966      *x = rect.left;
 967   if (y)
 968      *y = rect.top;
 969 }
 970
 971
 972 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 973 {
 974   RECT rect;
 975   GetWindowRect(GetHwnd(), &rect);
 976   POINT point;
 977   point.x = rect.left;
 978   point.y = rect.top;
 979
 980   // Since we now have the absolute screen coords,
 981   // if there's a parent we must subtract its top left corner
 982   wxMDIParentFrame * const mdiParent = GetMDIParent();
 983   ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);
 984
 985   if (x)
 986       *x = point.x;
 987   if (y)
 988       *y = point.y;
 989 }
 990
 991 void wxMDIChildFrame::InternalSetMenuBar()
 992 {
 993     wxMDIParentFrame * const parent = GetMDIParent();
 994
 995     MDIInsertWindowMenu(parent->GetClientWindow(),
 996                      m_hMenu, GetMDIWindowMenu(parent));
 997 }
 998
 999 void wxMDIChildFrame::DetachMenuBar()
1000 {
1001     MDIRemoveWindowMenu(NULL, m_hMenu);
1002     wxFrame::DetachMenuBar();
1003 }
1004
1005 WXHICON wxMDIChildFrame::GetDefaultIcon() const
1006 {
1007     // we don't have any standard icons (any more)
1008     return (WXHICON)0;
1009 }
1010
1011 // ---------------------------------------------------------------------------
1012 // MDI operations
1013 // ---------------------------------------------------------------------------
1014
1015 void wxMDIChildFrame::Maximize(bool maximize)
1016 {
1017     wxMDIParentFrame * const parent = GetMDIParent();
1018     if ( parent && parent->GetClientWindow() )
1019     {
1020         ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
1021                       maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
1022                       (WPARAM)GetHwnd(), 0);
1023     }
1024 }
1025
1026 void wxMDIChildFrame::Restore()
1027 {
1028     wxMDIParentFrame * const parent = GetMDIParent();
1029     if ( parent && parent->GetClientWindow() )
1030     {
1031         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIRESTORE,
1032                       (WPARAM) GetHwnd(), 0);
1033     }
1034 }
1035
1036 void wxMDIChildFrame::Activate()
1037 {
1038     wxMDIParentFrame * const parent = GetMDIParent();
1039     if ( parent && parent->GetClientWindow() )
1040     {
1041         ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIACTIVATE,
1042                       (WPARAM) GetHwnd(), 0);
1043     }
1044 }
1045
1046 // ---------------------------------------------------------------------------
1047 // MDI window proc and message handlers
1048 // ---------------------------------------------------------------------------
1049
1050 WXLRESULT wxMDIChildFrame::MSWWindowProc(WXUINT message,
1051                                          WXWPARAM wParam,
1052                                          WXLPARAM lParam)
1053 {
1054     WXLRESULT rc = 0;
1055     bool processed = false;
1056
1057     switch ( message )
1058     {
1059         case WM_GETMINMAXINFO:
1060             processed = HandleGetMinMaxInfo((MINMAXINFO *)lParam);
1061             break;
1062
1063         case WM_MDIACTIVATE:
1064             {
1065                 WXWORD act;
1066                 WXHWND hwndAct, hwndDeact;
1067                 UnpackMDIActivate(wParam, lParam, &act, &hwndAct, &hwndDeact);
1068
1069                 processed = HandleMDIActivate(act, hwndAct, hwndDeact);
1070             }
1071             // fall through
1072
1073         case WM_MOVE:
1074             // must pass WM_MOVE to DefMDIChildProc() to recalculate MDI client
1075             // scrollbars if necessary
1076
1077             // fall through
1078
1079         case WM_SIZE:
1080             // must pass WM_SIZE to DefMDIChildProc(), otherwise many weird
1081             // things happen
1082             MSWDefWindowProc(message, wParam, lParam);
1083             break;
1084
1085         case WM_WINDOWPOSCHANGING:
1086             processed = HandleWindowPosChanging((LPWINDOWPOS)lParam);
1087             break;
1088     }
1089
1090     if ( !processed )
1091         rc = wxFrame::MSWWindowProc(message, wParam, lParam);
1092
1093     return rc;
1094 }
1095
1096 bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
1097                                         WXHWND hwndAct,
1098                                         WXHWND hwndDeact)
1099 {
1100     wxMDIParentFrame * const parent = GetMDIParent();
1101
1102     WXHMENU hMenuToSet = 0;
1103
1104     bool activated;
1105
1106     if ( m_hWnd == hwndAct )
1107     {
1108         activated = true;
1109         parent->SetActiveChild(this);
1110
1111         WXHMENU hMenuChild = m_hMenu;
1112         if ( hMenuChild )
1113             hMenuToSet = hMenuChild;
1114     }
1115     else if ( m_hWnd == hwndDeact )
1116     {
1117         wxASSERT_MSG( parent->GetActiveChild() == this,
1118                       wxT("can't deactivate MDI child which wasn't active!") );
1119
1120         activated = false;
1121         parent->SetActiveChild(NULL);
1122
1123         WXHMENU hMenuParent = parent->m_hMenu;
1124
1125         // activate the the parent menu only when there is no other child
1126         // that has been activated
1127         if ( hMenuParent && !hwndAct )
1128             hMenuToSet = hMenuParent;
1129     }
1130     else
1131     {
1132         // we have nothing to do with it
1133         return false;
1134     }
1135
1136     if ( hMenuToSet )
1137     {
1138         MDISetMenu(parent->GetClientWindow(),
1139                    (HMENU)hMenuToSet, GetMDIWindowMenu(parent));
1140     }
1141
1142     wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
1143     event.SetEventObject( this );
1144
1145     ResetWindowStyle(NULL);
1146
1147     return HandleWindowEvent(event);
1148 }
1149
1150 bool wxMDIChildFrame::HandleWindowPosChanging(void *pos)
1151 {
1152     WINDOWPOS *lpPos = (WINDOWPOS *)pos;
1153
1154     if (!(lpPos->flags & SWP_NOSIZE))
1155     {
1156         RECT rectClient;
1157         DWORD dwExStyle = ::GetWindowLong(GetHwnd(), GWL_EXSTYLE);
1158         DWORD dwStyle = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1159         if (ResetWindowStyle((void *) & rectClient) && (dwStyle & WS_MAXIMIZE))
1160         {
1161             ::AdjustWindowRectEx(&rectClient, dwStyle, false, dwExStyle);
1162             lpPos->x = rectClient.left;
1163             lpPos->y = rectClient.top;
1164             lpPos->cx = rectClient.right - rectClient.left;
1165             lpPos->cy = rectClient.bottom - rectClient.top;
1166         }
1167     }
1168
1169     return false;
1170 }
1171
1172 bool wxMDIChildFrame::HandleGetMinMaxInfo(void *mmInfo)
1173 {
1174     MINMAXINFO *info = (MINMAXINFO *)mmInfo;
1175
1176     // let the default window proc calculate the size of MDI children
1177     // frames because it is based on the size of the MDI client window,
1178     // not on the values specified in wxWindow m_max variables
1179     bool processed = MSWDefWindowProc(WM_GETMINMAXINFO, 0, (LPARAM)mmInfo) != 0;
1180
1181     int minWidth = GetMinWidth(),
1182         minHeight = GetMinHeight();
1183
1184     // but allow GetSizeHints() to set the min size
1185     if ( minWidth != wxDefaultCoord )
1186     {
1187         info->ptMinTrackSize.x = minWidth;
1188
1189         processed = true;
1190     }
1191
1192     if ( minHeight != wxDefaultCoord )
1193     {
1194         info->ptMinTrackSize.y = minHeight;
1195
1196         processed = true;
1197     }
1198
1199     return processed;
1200 }
1201
1202 // ---------------------------------------------------------------------------
1203 // MDI specific message translation/preprocessing
1204 // ---------------------------------------------------------------------------
1205
1206 WXLRESULT wxMDIChildFrame::MSWDefWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
1207 {
1208     return DefMDIChildProc(GetHwnd(),
1209                            (UINT)message, (WPARAM)wParam, (LPARAM)lParam);
1210 }
1211
1212 bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
1213 {
1214     // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
1215     // doesn't do its job correctly for MDI child menus
1216     return MSWDoTranslateMessage(GetMDIParent(), msg);
1217 }
1218
1219 // ---------------------------------------------------------------------------
1220 // misc
1221 // ---------------------------------------------------------------------------
1222
1223 void wxMDIChildFrame::MSWDestroyWindow()
1224 {
1225     wxMDIParentFrame * const parent = GetMDIParent();
1226
1227     // Must make sure this handle is invalidated (set to NULL) since all sorts
1228     // of things could happen after the child client is destroyed, but before
1229     // the wxFrame is destroyed.
1230
1231     HWND oldHandle = (HWND)GetHWND();
1232     SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_MDIDESTROY,
1233                 (WPARAM)oldHandle, 0);
1234
1235     if (parent->GetActiveChild() == NULL)
1236         ResetWindowStyle(NULL);
1237
1238     if (m_hMenu)
1239     {
1240         ::DestroyMenu((HMENU) m_hMenu);
1241         m_hMenu = 0;
1242     }
1243     wxRemoveHandleAssociation(this);
1244     m_hWnd = 0;
1245 }
1246
1247 // Change the client window's extended style so we don't get a client edge
1248 // style when a child is maximised (a double border looks silly.)
1249 bool wxMDIChildFrame::ResetWindowStyle(void *vrect)
1250 {
1251     RECT *rect = (RECT *)vrect;
1252     wxMDIParentFrame * const pFrameWnd = GetMDIParent();
1253     wxMDIChildFrame* pChild = pFrameWnd->GetActiveChild();
1254
1255     if (!pChild || (pChild == this))
1256     {
1257         HWND hwndClient = GetWinHwnd(pFrameWnd->GetClientWindow());
1258         DWORD dwStyle = ::GetWindowLong(hwndClient, GWL_EXSTYLE);
1259
1260         // we want to test whether there is a maximized child, so just set
1261         // dwThisStyle to 0 if there is no child at all
1262         DWORD dwThisStyle = pChild
1263             ? ::GetWindowLong(GetWinHwnd(pChild), GWL_STYLE) : 0;
1264         DWORD dwNewStyle = dwStyle;
1265         if ( dwThisStyle & WS_MAXIMIZE )
1266             dwNewStyle &= ~(WS_EX_CLIENTEDGE);
1267         else
1268             dwNewStyle |= WS_EX_CLIENTEDGE;
1269
1270         if (dwStyle != dwNewStyle)
1271         {
1272             // force update of everything
1273             ::RedrawWindow(hwndClient, NULL, NULL,
1274                            RDW_INVALIDATE | RDW_ALLCHILDREN);
1275             ::SetWindowLong(hwndClient, GWL_EXSTYLE, dwNewStyle);
1276             ::SetWindowPos(hwndClient, NULL, 0, 0, 0, 0,
1277                            SWP_FRAMECHANGED | SWP_NOACTIVATE |
1278                            SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
1279                            SWP_NOCOPYBITS);
1280             if (rect)
1281                 ::GetClientRect(hwndClient, rect);
1282
1283             return true;
1284         }
1285     }
1286
1287     return false;
1288 }
1289
1290 // ===========================================================================
1291 // wxMDIClientWindow: the window of predefined (by Windows) class which
1292 // contains the child frames
1293 // ===========================================================================
1294
1295 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
1296 {
1297     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
1298
1299     CLIENTCREATESTRUCT ccs;
1300     m_windowStyle = style;
1301     m_parent = parent;
1302
1303     ccs.hWindowMenu = GetMDIWindowMenu(parent);
1304     ccs.idFirstChild = wxFIRST_MDI_CHILD;
1305
1306     DWORD msStyle = MDIS_ALLCHILDSTYLES | WS_VISIBLE | WS_CHILD |
1307                     WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
1308
1309     if ( style & wxHSCROLL )
1310         msStyle |= WS_HSCROLL;
1311     if ( style & wxVSCROLL )
1312         msStyle |= WS_VSCROLL;
1313
1314     DWORD exStyle = WS_EX_CLIENTEDGE;
1315
1316     wxWindowCreationHook hook(this);
1317     m_hWnd = (WXHWND)::CreateWindowEx
1318                        (
1319                         exStyle,
1320                         wxT("MDICLIENT"),
1321                         NULL,
1322                         msStyle,
1323                         0, 0, 0, 0,
1324                         GetWinHwnd(parent),
1325                         NULL,
1326                         wxGetInstance(),
1327                         (LPSTR)(LPCLIENTCREATESTRUCT)&ccs);
1328     if ( !m_hWnd )
1329     {
1330         wxLogLastError(wxT("CreateWindowEx(MDI client)"));
1331
1332         return false;
1333     }
1334
1335     SubclassWin(m_hWnd);
1336
1337     return true;
1338 }
1339
1340 // Explicitly call default scroll behaviour
1341 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
1342 {
1343     // Note: for client windows, the scroll position is not set in
1344     // WM_HSCROLL, WM_VSCROLL, so we can't easily determine what
1345     // scroll position we're at.
1346     // This makes it hard to paint patterns or bitmaps in the background,
1347     // and have the client area scrollable as well.
1348
1349     if ( event.GetOrientation() == wxHORIZONTAL )
1350         m_scrollX = event.GetPosition(); // Always returns zero!
1351     else
1352         m_scrollY = event.GetPosition(); // Always returns zero!
1353
1354     event.Skip();
1355 }
1356
1357 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
1358 {
1359     // Try to fix a problem whereby if you show an MDI child frame, then reposition the
1360     // client area, you can end up with a non-refreshed portion in the client window
1361     // (see OGL studio sample). So check if the position is changed and if so,
1362     // redraw the MDI child frames.
1363
1364     const wxPoint oldPos = GetPosition();
1365
1366     wxWindow::DoSetSize(x, y, width, height, sizeFlags | wxSIZE_FORCE);
1367
1368     const wxPoint newPos = GetPosition();
1369
1370     if ((newPos.x != oldPos.x) || (newPos.y != oldPos.y))
1371     {
1372         if (GetParent())
1373         {
1374             wxWindowList::compatibility_iterator node = GetParent()->GetChildren().GetFirst();
1375             while (node)
1376             {
1377                 wxWindow *child = node->GetData();
1378                 if (child->IsKindOf(CLASSINFO(wxMDIChildFrame)))
1379                 {
1380                    ::RedrawWindow(GetHwndOf(child),
1381                                   NULL,
1382                                   NULL,
1383                                   RDW_FRAME |
1384                                   RDW_ALLCHILDREN |
1385                                   RDW_INVALIDATE);
1386                 }
1387                 node = node->GetNext();
1388             }
1389         }
1390     }
1391 }
1392
1393 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
1394 {
1395     // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
1396     // in flicker e.g. when the frame contained controls with non-trivial
1397     // layout. Since 2.5.3, the frame is created hidden as all other top level
1398     // windows. In order to maintain backward compatibility, the frame is shown
1399     // in OnIdle, unless Show(false) was called by the programmer before.
1400     if ( m_needsInitialShow )
1401     {
1402         Show(true);
1403     }
1404
1405     // MDI child frames get their WM_SIZE when they're constructed but at this
1406     // moment they don't have any children yet so all child windows will be
1407     // positioned incorrectly when they are added later - to fix this, we
1408     // generate an artificial size event here
1409     if ( m_needsResize )
1410     {
1411         m_needsResize = false; // avoid any possibility of recursion
1412
1413         SendSizeEvent();
1414     }
1415
1416     event.Skip();
1417 }
1418
1419 // ---------------------------------------------------------------------------
1420 // private helper functions
1421 // ---------------------------------------------------------------------------
1422
1423 namespace
1424 {
1425
1426 void MDISetMenu(wxWindow *win, HMENU hmenuFrame, HMENU hmenuWindow)
1427 {
1428     if ( hmenuFrame || hmenuWindow )
1429     {
1430         if ( !::SendMessage(GetWinHwnd(win),
1431                             WM_MDISETMENU,
1432                             (WPARAM)hmenuFrame,
1433                             (LPARAM)hmenuWindow) )
1434         {
1435             DWORD err = ::GetLastError();
1436             if ( err )
1437             {
1438                 wxLogApiError(wxT("SendMessage(WM_MDISETMENU)"), err);
1439             }
1440         }
1441     }
1442
1443     // update menu bar of the parent window
1444     wxWindow *parent = win->GetParent();
1445     wxCHECK_RET( parent, wxT("MDI client without parent frame? weird...") );
1446
1447     ::SendMessage(GetWinHwnd(win), WM_MDIREFRESHMENU, 0, 0L);
1448
1449     ::DrawMenuBar(GetWinHwnd(parent));
1450 }
1451
1452 void MDIInsertWindowMenu(wxWindow *win, WXHMENU hMenu, HMENU menuWin)
1453 {
1454     HMENU hmenu = (HMENU)hMenu;
1455
1456     if ( menuWin )
1457     {
1458         // Try to insert Window menu in front of Help, otherwise append it.
1459         int N = GetMenuItemCount(hmenu);
1460         bool inserted = false;
1461         for ( int i = 0; i < N; i++ )
1462         {
1463             wxChar buf[256];
1464             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1465             {
1466                 wxLogLastError(wxT("GetMenuString"));
1467
1468                 continue;
1469             }
1470
1471             const wxString label = wxStripMenuCodes(buf);
1472             if ( label == wxGetStockLabel(wxID_HELP, wxSTOCK_NOFLAGS) )
1473             {
1474                 inserted = true;
1475                 ::InsertMenu(hmenu, i, MF_BYPOSITION | MF_POPUP | MF_STRING,
1476                              (UINT_PTR)menuWin,
1477                              wxGetTranslation(WINDOW_MENU_LABEL).wx_str());
1478                 break;
1479             }
1480         }
1481
1482         if ( !inserted )
1483         {
1484             ::AppendMenu(hmenu, MF_POPUP,
1485                          (UINT_PTR)menuWin,
1486                          wxGetTranslation(WINDOW_MENU_LABEL).wx_str());
1487         }
1488     }
1489
1490     MDISetMenu(win, hmenu, menuWin);
1491 }
1492
1493 void MDIRemoveWindowMenu(wxWindow *win, WXHMENU hMenu)
1494 {
1495     HMENU hmenu = (HMENU)hMenu;
1496
1497     if ( hmenu )
1498     {
1499         wxChar buf[1024];
1500
1501         int N = ::GetMenuItemCount(hmenu);
1502         for ( int i = 0; i < N; i++ )
1503         {
1504             if ( !::GetMenuString(hmenu, i, buf, WXSIZEOF(buf), MF_BYPOSITION) )
1505             {
1506                 // Ignore successful read of menu string with length 0 which
1507                 // occurs, for example, for a maximized MDI child system menu
1508                 if ( ::GetLastError() != 0 )
1509                 {
1510                     wxLogLastError(wxT("GetMenuString"));
1511                 }
1512
1513                 continue;
1514             }
1515
1516             if ( wxStrcmp(buf, wxGetTranslation(WINDOW_MENU_LABEL)) == 0 )
1517             {
1518                 if ( !::RemoveMenu(hmenu, i, MF_BYPOSITION) )
1519                 {
1520                     wxLogLastError(wxT("RemoveMenu"));
1521                 }
1522
1523                 break;
1524             }
1525         }
1526     }
1527
1528     if ( win )
1529     {
1530         // we don't change the windows menu, but we update the main one
1531         MDISetMenu(win, hmenu, NULL);
1532     }
1533 }
1534
1535 void UnpackMDIActivate(WXWPARAM wParam, WXLPARAM lParam,
1536                               WXWORD *activate, WXHWND *hwndAct, WXHWND *hwndDeact)
1537 {
1538     *activate = true;
1539     *hwndAct = (WXHWND)lParam;
1540     *hwndDeact = (WXHWND)wParam;
1541 }
1542
1543 } // anonymous namespace
1544
1545 #endif // wxUSE_MDI && !defined(__WXUNIVERSAL__)