src/motif/mdi.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mdi.cpp
   3 // Purpose:     MDI classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "mdi.h"
  14 #endif
  15
  16 #ifdef __VMS
  17 #define XtDisplay XTDISPLAY
  18 #define XtWindow XTWINDOW
  19 #endif
  20
  21 #include "wx/tab.h"
  22 #include "wx/mdi.h"
  23 #include "wx/menu.h"
  24 #include "wx/settings.h"
  25
  26 #ifdef __VMS__
  27 #pragma message disable nosimpint
  28 #endif
  29 #include <Xm/Xm.h>
  30 #include <Xm/BulletinB.h>
  31 #include <Xm/Form.h>
  32 #include <Xm/MainW.h>
  33 #include <Xm/RowColumn.h>
  34 #include <Xm/CascadeBG.h>
  35 #include <Xm/Text.h>
  36 #include <Xm/PushBG.h>
  37 #include <Xm/AtomMgr.h>
  38 #include <Xm/Protocols.h>
  39 #ifdef __VMS__
  40 #pragma message enable nosimpint
  41 #endif
  42
  43 #include "wx/motif/private.h"
  44
  45 extern wxList wxModelessWindows;
  46
  47 // Implemented in frame.cpp
  48 extern void wxFrameFocusProc(Widget workArea, XtPointer clientData,
  49                              XmAnyCallbackStruct *cbs);
  50
  51 #define wxID_NOTEBOOK_CLIENT_AREA wxID_HIGHEST + 100
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxMDIParentFrame, wxFrame)
  54 IMPLEMENT_DYNAMIC_CLASS(wxMDIChildFrame, wxFrame)
  55 IMPLEMENT_DYNAMIC_CLASS(wxMDIClientWindow, wxNotebook)
  56
  57 BEGIN_EVENT_TABLE(wxMDIParentFrame, wxFrame)
  58     EVT_SIZE(wxMDIParentFrame::OnSize)
  59     EVT_ACTIVATE(wxMDIParentFrame::OnActivate)
  60     EVT_SYS_COLOUR_CHANGED(wxMDIParentFrame::OnSysColourChanged)
  61     EVT_MENU_HIGHLIGHT_ALL(wxMDIParentFrame::OnMenuHighlight)
  62 END_EVENT_TABLE()
  63
  64 BEGIN_EVENT_TABLE(wxMDIClientWindow, wxNotebook)
  65     EVT_SCROLL(wxMDIClientWindow::OnScroll)
  66     EVT_NOTEBOOK_PAGE_CHANGED(wxID_NOTEBOOK_CLIENT_AREA, wxMDIClientWindow::OnPageChanged)
  67 END_EVENT_TABLE()
  68
  69
  70 // Parent frame
  71
  72 wxMDIParentFrame::wxMDIParentFrame()
  73 {
  74     m_clientWindow = (wxMDIClientWindow*) NULL;
  75     m_activeChild = (wxMDIChildFrame*) NULL;
  76     m_activeMenuBar = (wxMenuBar*) NULL;
  77 }
  78
  79 bool wxMDIParentFrame::Create(wxWindow *parent,
  80                               wxWindowID id,
  81                               const wxString& title,
  82                               const wxPoint& pos,
  83                               const wxSize& size,
  84                               long style,
  85                               const wxString& name)
  86 {
  87     m_clientWindow = (wxMDIClientWindow*) NULL;
  88     m_activeChild = (wxMDIChildFrame*) NULL;
  89     m_activeMenuBar = (wxMenuBar*) NULL;
  90
  91     bool success = wxFrame::Create(parent, id, title, pos, size, style, name);
  92     if (success)
  93     {
  94         // TODO: app cannot override OnCreateClient since
  95         // wxMDIParentFrame::OnCreateClient will still be called
  96         // (we're in the constructor). How to resolve?
  97
  98         m_clientWindow = OnCreateClient();
  99
 100         // Uses own style for client style
 101         m_clientWindow->CreateClient(this, GetWindowStyleFlag());
 102
 103         int w, h;
 104         GetClientSize(& w, & h);
 105         m_clientWindow->SetSize(0, 0, w, h);
 106         return TRUE;
 107     }
 108     else
 109         return FALSE;
 110 }
 111
 112 wxMDIParentFrame::~wxMDIParentFrame()
 113 {
 114     // Make sure we delete the client window last of all
 115     RemoveChild(m_clientWindow);
 116
 117     DestroyChildren();
 118
 119     delete m_clientWindow;
 120     m_clientWindow = NULL;
 121 }
 122
 123 void wxMDIParentFrame::SetMenuBar(wxMenuBar *menu_bar)
 124 {
 125     m_frameMenuBar = menu_bar;
 126
 127     SetChildMenuBar((wxMDIChildFrame*) NULL);
 128 }
 129
 130 void wxMDIParentFrame::OnSize(wxSizeEvent& WXUNUSED(event))
 131 {
 132 #if wxUSE_CONSTRAINTS
 133     if (GetAutoLayout())
 134         Layout();
 135 #endif
 136     int x = 0;
 137     int y = 0;
 138     int width, height;
 139     GetClientSize(&width, &height);
 140
 141     if ( GetClientWindow() )
 142         GetClientWindow()->SetSize(x, y, width, height);
 143 }
 144
 145 void wxMDIParentFrame::DoGetClientSize(int *width, int *height) const
 146 {
 147     wxFrame::DoGetClientSize(width, height);
 148 }
 149
 150 void wxMDIParentFrame::OnActivate(wxActivateEvent& WXUNUSED(event))
 151 {
 152     // Do nothing
 153 }
 154
 155 // Returns the active MDI child window
 156 wxMDIChildFrame *wxMDIParentFrame::GetActiveChild() const
 157 {
 158     return m_activeChild;
 159 }
 160
 161 // Create the client window class (don't Create the window,
 162 // just return a new class)
 163 wxMDIClientWindow *wxMDIParentFrame::OnCreateClient()
 164 {
 165     return new wxMDIClientWindow ;
 166 }
 167
 168 // Set the child's menu into the parent frame
 169 void wxMDIParentFrame::SetChildMenuBar(wxMDIChildFrame* child)
 170 {
 171     wxMenuBar* oldMenuBar = m_activeMenuBar;
 172
 173     if (child == (wxMDIChildFrame*) NULL)  // No child: use parent frame
 174     {
 175         if (GetMenuBar() && (GetMenuBar() != m_activeMenuBar))
 176         {
 177             //            if (m_activeMenuBar)
 178             //                m_activeMenuBar->DestroyMenuBar();
 179
 180             m_activeMenuBar = GetMenuBar();
 181             m_activeMenuBar->CreateMenuBar(this);
 182             /*
 183             if (oldMenuBar && XtIsManaged((Widget) oldMenuBar->GetMainWidget()))
 184             XtUnmanageChild((Widget) oldMenuBar->GetMainWidget());
 185             */
 186             if (oldMenuBar && oldMenuBar->GetMainWidget())
 187                 XtUnmapWidget((Widget) oldMenuBar->GetMainWidget());
 188
 189         }
 190     }
 191     else if (child->GetMenuBar() == (wxMenuBar*) NULL) // No child menu bar: use parent frame
 192     {
 193         if (GetMenuBar() && (GetMenuBar() != m_activeMenuBar))
 194         {
 195             //            if (m_activeMenuBar)
 196             //                m_activeMenuBar->DestroyMenuBar();
 197             m_activeMenuBar = GetMenuBar();
 198             m_activeMenuBar->CreateMenuBar(this);
 199             /*
 200             if (oldMenuBar && XtIsManaged((Widget) oldMenuBar->GetMainWidget()))
 201             XtUnmanageChild((Widget) oldMenuBar->GetMainWidget());
 202             */
 203             if (oldMenuBar && oldMenuBar->GetMainWidget())
 204                 XtUnmapWidget((Widget) oldMenuBar->GetMainWidget());
 205         }
 206     }
 207     else // The child has a menubar
 208     {
 209         if (child->GetMenuBar() != m_activeMenuBar)
 210         {
 211             //            if (m_activeMenuBar)
 212             //                m_activeMenuBar->DestroyMenuBar();
 213
 214             m_activeMenuBar = child->GetMenuBar();
 215             m_activeMenuBar->CreateMenuBar(this);
 216             /*
 217             if (oldMenuBar && XtIsManaged((Widget) oldMenuBar->GetMainWidget()))
 218             XtUnmanageChild((Widget) oldMenuBar->GetMainWidget());
 219             */
 220             if (oldMenuBar && oldMenuBar->GetMainWidget())
 221                 XtUnmapWidget((Widget) oldMenuBar->GetMainWidget());
 222         }
 223     }
 224 }
 225
 226 // Redirect events to active child first
 227 bool wxMDIParentFrame::ProcessEvent(wxEvent& event)
 228 {
 229     // Stops the same event being processed repeatedly
 230     static wxEventType inEvent = wxEVT_NULL;
 231     if (inEvent == event.GetEventType())
 232         return FALSE;
 233
 234     inEvent = event.GetEventType();
 235
 236     bool res = FALSE;
 237     if (m_activeChild && event.IsKindOf(CLASSINFO(wxCommandEvent)))
 238     {
 239         res = m_activeChild->GetEventHandler()->ProcessEvent(event);
 240     }
 241
 242     if (!res)
 243         res = GetEventHandler()->wxEvtHandler::ProcessEvent(event);
 244
 245     inEvent = wxEVT_NULL;
 246
 247     return res;
 248 }
 249
 250 void wxMDIParentFrame::DoSetSize(int x, int y,
 251                                  int width, int height,
 252                                  int sizeFlags)
 253 {
 254     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 255 }
 256
 257 void wxMDIParentFrame::DoSetClientSize(int width, int height)
 258 {
 259     wxWindow::DoSetClientSize(width, height);
 260 }
 261
 262 // Responds to colour changes, and passes event on to children.
 263 void wxMDIParentFrame::OnSysColourChanged(wxSysColourChangedEvent& event)
 264 {
 265     // TODO
 266
 267     // Propagate the event to the non-top-level children
 268     wxFrame::OnSysColourChanged(event);
 269 }
 270
 271 // MDI operations
 272 void wxMDIParentFrame::Cascade()
 273 {
 274     // TODO
 275 }
 276
 277 void wxMDIParentFrame::Tile()
 278 {
 279     // TODO
 280 }
 281
 282 void wxMDIParentFrame::ArrangeIcons()
 283 {
 284     // TODO
 285 }
 286
 287 void wxMDIParentFrame::ActivateNext()
 288 {
 289     // TODO
 290 }
 291
 292 void wxMDIParentFrame::ActivatePrevious()
 293 {
 294     // TODO
 295 }
 296
 297 // Default menu selection behaviour - display a help string
 298 void wxMDIParentFrame::OnMenuHighlight(wxMenuEvent& event)
 299 {
 300     if (GetStatusBar())
 301     {
 302         if (event.GetMenuId() == -1)
 303             SetStatusText("");
 304         else
 305         {
 306             wxMenuBar *menuBar = (wxMenuBar*) NULL;
 307             if (GetActiveChild())
 308               menuBar = GetActiveChild()->GetMenuBar();
 309             else
 310               menuBar = GetMenuBar();
 311             if (menuBar)
 312             {
 313                 wxString helpString(menuBar->GetHelpString(event.GetMenuId()));
 314                 if (helpString != "")
 315                     SetStatusText(helpString);
 316             }
 317         }
 318     }
 319 }
 320
 321 // Child frame
 322
 323 wxMDIChildFrame::wxMDIChildFrame()
 324 {
 325     m_mdiParentFrame = (wxMDIParentFrame*) NULL;
 326 }
 327
 328 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
 329                              wxWindowID id,
 330                              const wxString& title,
 331                              const wxPoint& pos,
 332                              const wxSize& size,
 333                              long style,
 334                              const wxString& name)
 335 {
 336     SetName(name);
 337     SetWindowStyleFlag(style);
 338
 339     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
 340     m_foregroundColour = *wxBLACK;
 341     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 342
 343     if ( id > -1 )
 344         m_windowId = id;
 345     else
 346         m_windowId = (int)NewControlId();
 347
 348     wxMDIClientWindow* clientWindow = parent->GetClientWindow();
 349
 350     wxASSERT_MSG( (clientWindow != (wxWindow*) NULL), "Missing MDI client window.");
 351
 352     if (clientWindow) clientWindow->AddChild(this);
 353
 354     SetMDIParentFrame(parent);
 355
 356     int width = size.x;
 357     int height = size.y;
 358     if (width == -1)
 359         width = 200; // TODO: give reasonable default
 360     if (height == -1)
 361         height = 200; // TODO: give reasonable default
 362
 363     // We're deactivating the old child
 364     wxMDIChildFrame* oldActiveChild = parent->GetActiveChild();
 365     if (oldActiveChild)
 366     {
 367         wxActivateEvent event(wxEVT_ACTIVATE, FALSE, oldActiveChild->GetId());
 368         event.SetEventObject( oldActiveChild );
 369         oldActiveChild->GetEventHandler()->ProcessEvent(event);
 370     }
 371
 372     // This is the currently active child
 373     parent->SetActiveChild((wxMDIChildFrame*) this);
 374
 375     // This time we'll try a bog-standard bulletin board for
 376     // the 'frame'. A main window doesn't seem to work.
 377
 378     m_mainWidget = (WXWidget) XtVaCreateWidget("client",
 379         xmBulletinBoardWidgetClass, (Widget) clientWindow->GetTopWidget(),
 380         XmNmarginWidth, 0,
 381         XmNmarginHeight, 0,
 382         /*
 383         XmNrightAttachment, XmATTACH_FORM,
 384         XmNleftAttachment, XmATTACH_FORM,
 385         XmNtopAttachment, XmATTACH_FORM,
 386         XmNbottomAttachment, XmATTACH_FORM,
 387         */
 388         XmNresizePolicy, XmRESIZE_NONE,
 389         NULL);
 390
 391     XtAddEventHandler((Widget) m_mainWidget, ExposureMask,FALSE,
 392         wxUniversalRepaintProc, (XtPointer) this);
 393
 394     SetCanAddEventHandler(TRUE);
 395     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, size.x, size.y);
 396
 397     ChangeBackgroundColour();
 398
 399     XtManageChild((Widget) m_mainWidget);
 400
 401     SetTitle(title);
 402
 403     clientWindow->AddPage(this, title, TRUE);
 404     clientWindow->Refresh();
 405
 406     // Positions the toolbar and status bar -- but we don't have any.
 407     //    PreResize();
 408
 409     wxModelessWindows.Append(this);
 410     return TRUE;
 411 }
 412
 413
 414 wxMDIChildFrame::~wxMDIChildFrame()
 415 {
 416     if (m_mainWidget)
 417       XtRemoveEventHandler((Widget) m_mainWidget, ExposureMask,FALSE,
 418         wxUniversalRepaintProc, (XtPointer) this);
 419
 420     if (GetMDIParentFrame())
 421     {
 422         wxMDIParentFrame* parentFrame = GetMDIParentFrame();
 423
 424         if (parentFrame->GetActiveChild() == this)
 425             parentFrame->SetActiveChild((wxMDIChildFrame*) NULL);
 426         wxMDIClientWindow* clientWindow = parentFrame->GetClientWindow();
 427
 428         // Remove page if still there
 429         if (clientWindow->RemovePage(this))
 430             clientWindow->Refresh();
 431
 432         // Set the selection to the first remaining page
 433         if (clientWindow->GetPageCount() > 0)
 434         {
 435             wxMDIChildFrame* child = (wxMDIChildFrame*)  clientWindow->GetPage(0);
 436             parentFrame->SetActiveChild(child);
 437             parentFrame->SetChildMenuBar(child);
 438         }
 439         else
 440         {
 441             parentFrame->SetActiveChild((wxMDIChildFrame*) NULL);
 442             parentFrame->SetChildMenuBar((wxMDIChildFrame*) NULL);
 443         }
 444     }
 445 }
 446
 447 #if 0
 448 // Implementation: intercept and act upon raise and lower commands.
 449 void wxMDIChildFrame::OnRaise()
 450 {
 451     wxMDIParentFrame* parentFrame = (wxMDIParentFrame*) GetParent() ;
 452     wxMDIChildFrame* oldActiveChild = parentFrame->GetActiveChild();
 453     parentFrame->SetActiveChild(this);
 454
 455     if (oldActiveChild)
 456     {
 457         wxActivateEvent event(wxEVT_ACTIVATE, FALSE, oldActiveChild->GetId());
 458         event.SetEventObject( oldActiveChild );
 459         oldActiveChild->GetEventHandler()->ProcessEvent(event);
 460     }
 461
 462     wxActivateEvent event(wxEVT_ACTIVATE, TRUE, this->GetId());
 463     event.SetEventObject( this );
 464     this->GetEventHandler()->ProcessEvent(event);
 465 }
 466
 467 void wxMDIChildFrame::OnLower()
 468 {
 469     wxMDIParentFrame* parentFrame = (wxMDIParentFrame*) GetParent() ;
 470     wxMDIChildFrame* oldActiveChild = parentFrame->GetActiveChild();
 471
 472     if (oldActiveChild == this)
 473     {
 474         wxActivateEvent event(wxEVT_ACTIVATE, FALSE, oldActiveChild->GetId());
 475         event.SetEventObject( oldActiveChild );
 476         oldActiveChild->GetEventHandler()->ProcessEvent(event);
 477     }
 478     // TODO: unfortunately we don't now know which is the top-most child,
 479     // so make the active child NULL.
 480     parentFrame->SetActiveChild((wxMDIChildFrame*) NULL);
 481 }
 482 #endif
 483
 484 // Set the client size (i.e. leave the calculation of borders etc.
 485 // to wxWindows)
 486 void wxMDIChildFrame::DoSetClientSize(int width, int height)
 487 {
 488     wxWindow::DoSetClientSize(width, height);
 489 }
 490
 491 void wxMDIChildFrame::DoGetClientSize(int* width, int* height) const
 492 {
 493     wxWindow::DoGetSize(width, height);
 494 }
 495
 496 void wxMDIChildFrame::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 497 {
 498     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 499 }
 500
 501 void wxMDIChildFrame::DoGetSize(int* width, int* height) const
 502 {
 503     wxWindow::DoGetSize(width, height);
 504 }
 505
 506 void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
 507 {
 508     wxWindow::DoGetPosition(x, y);
 509 }
 510
 511 bool wxMDIChildFrame::Show(bool show)
 512 {
 513     SetVisibleStatus( show );
 514     return wxWindow::Show(show);
 515 }
 516
 517 void wxMDIChildFrame::SetMenuBar(wxMenuBar *menuBar)
 518 {
 519     // Don't create the underlying menubar yet; need to recreate
 520     // it every time the child is activated.
 521     m_frameMenuBar = menuBar;
 522
 523     // We make the assumption that if you're setting the menubar,
 524     // this is the currently active child.
 525     GetMDIParentFrame()->SetChildMenuBar(this);
 526 }
 527
 528 // Set icon
 529 void wxMDIChildFrame::SetIcon(const wxIcon& icon)
 530 {
 531     m_icons = wxIconBundle( icon );
 532
 533     if (icon.Ok())
 534     {
 535         // Not appropriate since there are no icons in
 536         // a tabbed window
 537     }
 538 }
 539
 540 void wxMDIChildFrame::SetIcons(const wxIconBundle& icons)
 541 {
 542     m_icons = icons;
 543 }
 544
 545 void wxMDIChildFrame::SetTitle(const wxString& title)
 546 {
 547     wxTopLevelWindow::SetTitle( title );
 548     wxMDIClientWindow* clientWindow = GetMDIParentFrame()->GetClientWindow();
 549     int pageNo = clientWindow->FindPagePosition(this);
 550     if (pageNo > -1)
 551         clientWindow->SetPageText(pageNo, title);
 552 }
 553
 554 // MDI operations
 555 void wxMDIChildFrame::Maximize()
 556 {
 557     // TODO
 558 }
 559
 560 void wxMDIChildFrame::Iconize(bool WXUNUSED(iconize))
 561 {
 562     // TODO
 563 }
 564
 565 bool wxMDIChildFrame::IsIconized() const
 566 {
 567     return FALSE;
 568 }
 569
 570 // Is it maximized? Always maximized under Motif, using the
 571 // tabbed MDI implementation.
 572 bool wxMDIChildFrame::IsMaximized(void) const
 573 {
 574     return TRUE;
 575 }
 576
 577 void wxMDIChildFrame::Restore()
 578 {
 579     // TODO
 580 }
 581
 582 void wxMDIChildFrame::Activate()
 583 {
 584     // TODO
 585 }
 586
 587 void wxMDIChildFrame::CaptureMouse()
 588 {
 589     wxWindow::CaptureMouse();
 590 }
 591
 592 void wxMDIChildFrame::ReleaseMouse()
 593 {
 594     wxWindow::ReleaseMouse();
 595 }
 596
 597 void wxMDIChildFrame::Raise()
 598 {
 599     wxWindow::Raise();
 600 }
 601
 602 void wxMDIChildFrame::Lower(void)
 603 {
 604     wxWindow::Raise();
 605 }
 606
 607 void wxMDIChildFrame::SetSizeHints(int WXUNUSED(minW), int WXUNUSED(minH), int WXUNUSED(maxW), int WXUNUSED(maxH), int WXUNUSED(incW), int WXUNUSED(incH))
 608 {
 609 }
 610
 611 // Client window
 612
 613 wxMDIClientWindow::wxMDIClientWindow()
 614 {
 615 }
 616
 617 wxMDIClientWindow::~wxMDIClientWindow()
 618 {
 619     // By the time this destructor is called, the child frames will have been
 620     // deleted and removed from the notebook/client window.
 621     DestroyChildren();
 622
 623     m_mainWidget = (WXWidget) 0;
 624 }
 625
 626 bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
 627 {
 628     SetWindowStyleFlag(style);
 629
 630     //    m_windowParent = parent;
 631     //    m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_APPWORKSPACE);
 632
 633     bool success = wxNotebook::Create(parent, wxID_NOTEBOOK_CLIENT_AREA, wxPoint(0, 0), wxSize(100, 100), 0);
 634     if (success)
 635     {
 636         wxFont font(10, wxSWISS, wxNORMAL, wxNORMAL);
 637         wxFont selFont(10, wxSWISS, wxNORMAL, wxBOLD);
 638         GetTabView()->SetTabFont(font);
 639         GetTabView()->SetSelectedTabFont(selFont);
 640         GetTabView()->SetTabSize(120, 18);
 641         GetTabView()->SetTabSelectionHeight(20);
 642         return TRUE;
 643     }
 644     else
 645         return FALSE;
 646 }
 647
 648 void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 649 {
 650     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
 651 }
 652
 653 void wxMDIClientWindow::DoSetClientSize(int width, int height)
 654 {
 655     wxWindow::DoSetClientSize(width, height);
 656 }
 657
 658 void wxMDIClientWindow::DoGetClientSize(int *width, int *height) const
 659 {
 660     wxWindow::DoGetClientSize(width, height);
 661 }
 662
 663 void wxMDIClientWindow::DoGetSize(int *width, int *height) const
 664 {
 665     wxWindow::DoGetSize(width, height);
 666 }
 667
 668 void wxMDIClientWindow::DoGetPosition(int *x, int *y) const
 669 {
 670     wxWindow::DoGetPosition(x, y);
 671 }
 672
 673 void wxMDIClientWindow::OnScroll(wxScrollEvent& event)
 674 {
 675     //    Default(); // Default processing: OBSOLETE FUNCTION
 676     event.Skip();
 677 }
 678
 679 void wxMDIClientWindow::OnPageChanged(wxNotebookEvent& event)
 680 {
 681     // Notify child that it has been activated
 682     if (event.GetOldSelection() != -1)
 683     {
 684         wxMDIChildFrame* oldChild = (wxMDIChildFrame*) GetPage(event.GetOldSelection());
 685         if (oldChild)
 686         {
 687             wxActivateEvent event(wxEVT_ACTIVATE, FALSE, oldChild->GetId());
 688             event.SetEventObject( oldChild );
 689             oldChild->GetEventHandler()->ProcessEvent(event);
 690         }
 691     }
 692     if (event.GetSelection() != -1)
 693     {
 694         wxMDIChildFrame* activeChild = (wxMDIChildFrame*) GetPage(event.GetSelection());
 695         if (activeChild)
 696         {
 697             wxActivateEvent event(wxEVT_ACTIVATE, TRUE, activeChild->GetId());
 698             event.SetEventObject( activeChild );
 699             activeChild->GetEventHandler()->ProcessEvent(event);
 700
 701             if (activeChild->GetMDIParentFrame())
 702             {
 703                 activeChild->GetMDIParentFrame()->SetActiveChild(activeChild);
 704                 activeChild->GetMDIParentFrame()->SetChildMenuBar(activeChild);
 705             }
 706         }
 707     }
 708     event.Skip();
 709 }