src/generic/notebook.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/notebook.cpp
   3 // Purpose:     generic implementation of wxNotebook
   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 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_NOTEBOOK
  28
  29 #include  "wx/notebook.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include  "wx/dcclient.h"
  35     #include  "wx/settings.h"
  36 #endif
  37
  38 #include  "wx/imaglist.h"
  39 #include  "wx/generic/tabg.h"
  40
  41 // ----------------------------------------------------------------------------
  42 // macros
  43 // ----------------------------------------------------------------------------
  44
  45 // check that the page index is valid
  46 #define IS_VALID_PAGE(nPage) ((nPage) < GetPageCount())
  47
  48 // ----------------------------------------------------------------------------
  49 // event table
  50 // ----------------------------------------------------------------------------
  51
  52 DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED)
  53 DEFINE_EVENT_TYPE(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGING)
  54
  55 BEGIN_EVENT_TABLE(wxNotebook, wxControl)
  56     EVT_NOTEBOOK_PAGE_CHANGED(wxID_ANY, wxNotebook::OnSelChange)
  57     EVT_SIZE(wxNotebook::OnSize)
  58     EVT_PAINT(wxNotebook::OnPaint)
  59     EVT_MOUSE_EVENTS(wxNotebook::OnMouseEvent)
  60     EVT_SET_FOCUS(wxNotebook::OnSetFocus)
  61     EVT_NAVIGATION_KEY(wxNotebook::OnNavigationKey)
  62 END_EVENT_TABLE()
  63
  64 IMPLEMENT_DYNAMIC_CLASS(wxNotebook, wxControl)
  65 IMPLEMENT_DYNAMIC_CLASS(wxNotebookEvent, wxCommandEvent)
  66
  67 // ============================================================================
  68 // implementation
  69 // ============================================================================
  70
  71 // ============================================================================
  72 // Private class
  73 // ============================================================================
  74
  75 WX_DECLARE_HASH_MAP(int, wxNotebookPage*, wxIntegerHash, wxIntegerEqual,
  76                     wxIntToNotebookPageHashMap);
  77
  78 WX_DECLARE_HASH_MAP(wxNotebookPage*, int, wxPointerHash, wxPointerEqual,
  79                     wxNotebookPageToIntHashMap);
  80
  81 // This reuses wxTabView to draw the tabs.
  82 class WXDLLEXPORT wxNotebookTabView: public wxTabView
  83 {
  84 DECLARE_DYNAMIC_CLASS(wxNotebookTabView)
  85 public:
  86     wxNotebookTabView(wxNotebook* notebook, long style = wxTAB_STYLE_DRAW_BOX | wxTAB_STYLE_COLOUR_INTERIOR);
  87     virtual ~wxNotebookTabView(void);
  88
  89     // Called when a tab is activated
  90     virtual void OnTabActivate(int activateId, int deactivateId);
  91     // Allows vetoing
  92     virtual bool OnTabPreActivate(int activateId, int deactivateId);
  93
  94     // map integer ids used by wxTabView to wxNotebookPage pointers
  95     int GetId(wxNotebookPage *page);
  96     wxNotebookPage *GetPage(int id) { return m_idToPage[id]; }
  97
  98 protected:
  99     wxNotebook* m_notebook;
 100
 101 private:
 102     wxIntToNotebookPageHashMap m_idToPage;
 103     wxNotebookPageToIntHashMap m_pageToId;
 104     int m_nextid;
 105 };
 106
 107 static int GetPageId(wxTabView *tabview, wxNotebookPage *page)
 108 {
 109     return wx_static_cast(wxNotebookTabView*, tabview)->GetId(page);
 110 }
 111
 112 // ----------------------------------------------------------------------------
 113 // wxNotebook construction
 114 // ----------------------------------------------------------------------------
 115
 116 // common part of all ctors
 117 void wxNotebook::Init()
 118 {
 119     m_tabView = (wxNotebookTabView*) NULL;
 120     m_nSelection = -1;
 121 }
 122
 123 // default for dynamic class
 124 wxNotebook::wxNotebook()
 125 {
 126     Init();
 127 }
 128
 129 // the same arguments as for wxControl
 130 wxNotebook::wxNotebook(wxWindow *parent,
 131                        wxWindowID id,
 132                        const wxPoint& pos,
 133                        const wxSize& size,
 134                        long style,
 135                        const wxString& name)
 136 {
 137     Init();
 138
 139     Create(parent, id, pos, size, style, name);
 140 }
 141
 142 // Create() function
 143 bool wxNotebook::Create(wxWindow *parent,
 144                         wxWindowID id,
 145                         const wxPoint& pos,
 146                         const wxSize& size,
 147                         long style,
 148                         const wxString& name)
 149 {
 150     // base init
 151     SetName(name);
 152
 153     if ( (style & wxBK_ALIGN_MASK) == wxBK_DEFAULT )
 154         style |= wxBK_TOP;
 155
 156     m_windowId = id == wxID_ANY ? NewControlId() : id;
 157
 158     if (!wxControl::Create(parent, id, pos, size, style|wxNO_BORDER, wxDefaultValidator, name))
 159         return false;
 160
 161     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));
 162
 163     SetTabView(new wxNotebookTabView(this));
 164
 165     return true;
 166 }
 167
 168 // dtor
 169 wxNotebook::~wxNotebook()
 170 {
 171     delete m_tabView;
 172 }
 173
 174 // ----------------------------------------------------------------------------
 175 // wxNotebook accessors
 176 // ----------------------------------------------------------------------------
 177 int wxNotebook::GetRowCount() const
 178 {
 179     // TODO
 180     return 0;
 181 }
 182
 183 int wxNotebook::SetSelection(size_t nPage)
 184 {
 185     wxASSERT( IS_VALID_PAGE(nPage) );
 186
 187     wxNotebookPage* pPage = GetPage(nPage);
 188
 189     m_tabView->SetTabSelection(GetPageId(m_tabView, pPage));
 190
 191     // TODO
 192     return 0;
 193 }
 194
 195 #if 0
 196 void wxNotebook::AdvanceSelection(bool bForward)
 197 {
 198     int nSel = GetSelection();
 199     int nMax = GetPageCount() - 1;
 200     if ( bForward )
 201         SetSelection(nSel == nMax ? 0 : nSel + 1);
 202     else
 203         SetSelection(nSel == 0 ? nMax : nSel - 1);
 204 }
 205 #endif
 206
 207 bool wxNotebook::SetPageText(size_t nPage, const wxString& strText)
 208 {
 209     wxASSERT( IS_VALID_PAGE(nPage) );
 210
 211     wxNotebookPage* page = GetPage(nPage);
 212     if (page)
 213     {
 214         m_tabView->SetTabText(GetPageId(m_tabView, page), strText);
 215         Refresh();
 216         return true;
 217     }
 218
 219     return false;
 220 }
 221
 222 wxString wxNotebook::GetPageText(size_t nPage) const
 223 {
 224     wxASSERT( IS_VALID_PAGE(nPage) );
 225
 226     wxNotebookPage* page = ((wxNotebook*)this)->GetPage(nPage);
 227     if (page)
 228         return m_tabView->GetTabText(GetPageId(m_tabView, page));
 229     else
 230         return wxEmptyString;
 231 }
 232
 233 int wxNotebook::GetPageImage(size_t WXUNUSED_UNLESS_DEBUG(nPage)) const
 234 {
 235     wxASSERT( IS_VALID_PAGE(nPage) );
 236
 237     // TODO
 238     return 0;
 239 }
 240
 241 bool wxNotebook::SetPageImage(size_t WXUNUSED_UNLESS_DEBUG(nPage),
 242                               int WXUNUSED(nImage))
 243 {
 244     wxASSERT( IS_VALID_PAGE(nPage) );
 245
 246     // TODO
 247     return false;
 248 }
 249
 250 // set the size (the same for all pages)
 251 void wxNotebook::SetPageSize(const wxSize& WXUNUSED(size))
 252 {
 253     // TODO
 254 }
 255
 256 // set the padding between tabs (in pixels)
 257 void wxNotebook::SetPadding(const wxSize& WXUNUSED(padding))
 258 {
 259     // TODO
 260 }
 261
 262 // set the size of the tabs for wxNB_FIXEDWIDTH controls
 263 void wxNotebook::SetTabSize(const wxSize& WXUNUSED(sz))
 264 {
 265     // TODO
 266 }
 267
 268 // ----------------------------------------------------------------------------
 269 // wxNotebook operations
 270 // ----------------------------------------------------------------------------
 271
 272 // remove one page from the notebook and delete it
 273 bool wxNotebook::DeletePage(size_t nPage)
 274 {
 275     wxCHECK( IS_VALID_PAGE(nPage), false );
 276
 277     if (m_nSelection != -1)
 278     {
 279         m_pages[m_nSelection]->Show(false);
 280         m_pages[m_nSelection]->Lower();
 281     }
 282
 283     wxNotebookPage* pPage = GetPage(nPage);
 284
 285     m_tabView->RemoveTab(GetPageId(m_tabView, pPage));
 286
 287     m_pages.Remove(pPage);
 288     delete pPage;
 289
 290     if (m_pages.GetCount() == 0)
 291     {
 292         m_nSelection = -1;
 293         m_tabView->SetTabSelection(-1, false);
 294     }
 295     else if (m_nSelection > -1)
 296     {
 297         m_nSelection = -1;
 298
 299         m_tabView->SetTabSelection(GetPageId(m_tabView, GetPage(0)), false);
 300
 301         if (m_nSelection != 0)
 302             ChangePage(-1, 0);
 303     }
 304
 305     RefreshLayout(false);
 306
 307     return true;
 308 }
 309
 310 bool wxNotebook::DeletePage(wxNotebookPage* page)
 311 {
 312     int pagePos = FindPagePosition(page);
 313     if (pagePos > -1)
 314         return DeletePage(pagePos);
 315     else
 316         return false;
 317 }
 318
 319 bool wxNotebook::RemovePage(size_t nPage)
 320 {
 321     return DoRemovePage(nPage) != NULL;
 322 }
 323
 324 // remove one page from the notebook
 325 wxWindow* wxNotebook::DoRemovePage(size_t nPage)
 326 {
 327     wxCHECK( IS_VALID_PAGE(nPage), NULL );
 328
 329     m_pages[nPage]->Show(false);
 330     //    m_pages[nPage]->Lower();
 331
 332     wxNotebookPage* pPage = GetPage(nPage);
 333
 334     m_tabView->RemoveTab(GetPageId(m_tabView, pPage));
 335
 336     m_pages.Remove(pPage);
 337
 338     if (m_pages.GetCount() == 0)
 339     {
 340       m_nSelection = -1;
 341       m_tabView->SetTabSelection(-1, true);
 342     }
 343     else if (m_nSelection > -1)
 344     {
 345       // Only change the selection if the page we
 346       // deleted was the selection.
 347       if (nPage == (size_t)m_nSelection)
 348       {
 349          m_nSelection = -1;
 350          // Select the first tab. Generates a ChangePage.
 351          m_tabView->SetTabSelection(0, true);
 352       }
 353       else
 354       {
 355         // We must adjust which tab we think is selected.
 356         // If greater than the page we deleted, it must be moved down
 357         // a notch.
 358         if (size_t(m_nSelection) > nPage)
 359           m_nSelection -- ;
 360       }
 361     }
 362
 363     RefreshLayout(false);
 364
 365     return pPage;
 366 }
 367
 368 bool wxNotebook::RemovePage(wxNotebookPage* page)
 369 {
 370     int pagePos = FindPagePosition(page);
 371     if (pagePos > -1)
 372         return RemovePage(pagePos);
 373     else
 374         return false;
 375 }
 376
 377 // Find the position of the wxNotebookPage, -1 if not found.
 378 int wxNotebook::FindPagePosition(wxNotebookPage* page) const
 379 {
 380     size_t nPageCount = GetPageCount();
 381     size_t nPage;
 382     for ( nPage = 0; nPage < nPageCount; nPage++ )
 383         if (m_pages[nPage] == page)
 384             return nPage;
 385     return -1;
 386 }
 387
 388 // remove all pages
 389 bool wxNotebook::DeleteAllPages()
 390 {
 391     m_tabView->ClearTabs(true);
 392
 393     size_t nPageCount = GetPageCount();
 394     size_t nPage;
 395     for ( nPage = 0; nPage < nPageCount; nPage++ )
 396         delete m_pages[nPage];
 397
 398     m_pages.Clear();
 399
 400     return true;
 401 }
 402
 403 // same as AddPage() but does it at given position
 404 bool wxNotebook::InsertPage(size_t nPage,
 405                             wxNotebookPage *pPage,
 406                             const wxString& strText,
 407                             bool bSelect,
 408                             int WXUNUSED(imageId))
 409 {
 410     wxASSERT( pPage != NULL );
 411     wxCHECK( IS_VALID_PAGE(nPage) || nPage == GetPageCount(), false );
 412
 413     m_tabView->AddTab(GetPageId(m_tabView, pPage), strText);
 414
 415     if (!bSelect)
 416       pPage->Show(false);
 417
 418     // save the pointer to the page
 419     m_pages.Insert(pPage, nPage);
 420
 421     if (bSelect)
 422     {
 423         // This will cause ChangePage to be called, via OnSelPage
 424
 425         m_tabView->SetTabSelection(GetPageId(m_tabView, pPage), true);
 426     }
 427
 428     // some page must be selected: either this one or the first one if there is
 429     // still no selection
 430     if ( m_nSelection == -1 )
 431       ChangePage(-1, 0);
 432
 433     RefreshLayout(false);
 434
 435     return true;
 436 }
 437
 438 // ----------------------------------------------------------------------------
 439 // wxNotebook callbacks
 440 // ----------------------------------------------------------------------------
 441
 442 // @@@ OnSize() is used for setting the font when it's called for the first
 443 //     time because doing it in ::Create() doesn't work (for unknown reasons)
 444 void wxNotebook::OnSize(wxSizeEvent& event)
 445 {
 446     static bool s_bFirstTime = true;
 447     if ( s_bFirstTime ) {
 448         // TODO: any first-time-size processing.
 449         s_bFirstTime = false;
 450     }
 451
 452     RefreshLayout();
 453
 454     // Processing continues to next OnSize
 455     event.Skip();
 456 }
 457
 458 // This was supposed to cure the non-display of the notebook
 459 // until the user resizes the window.
 460 // What's going on?
 461 void wxNotebook::OnInternalIdle()
 462 {
 463     wxWindow::OnInternalIdle();
 464
 465 #if 0
 466     static bool s_bFirstTime = true;
 467     if ( s_bFirstTime ) {
 468       /*
 469       wxSize sz(GetSize());
 470       sz.x ++;
 471       SetSize(sz);
 472       sz.x --;
 473       SetSize(sz);
 474       */
 475
 476       /*
 477       wxSize sz(GetSize());
 478       wxSizeEvent sizeEvent(sz, GetId());
 479       sizeEvent.SetEventObject(this);
 480       GetEventHandler()->ProcessEvent(sizeEvent);
 481       Refresh();
 482       */
 483       s_bFirstTime = false;
 484     }
 485 #endif
 486 }
 487
 488 // Implementation: calculate the layout of the view rect
 489 // and resize the children if required
 490 bool wxNotebook::RefreshLayout(bool force)
 491 {
 492     if (m_tabView)
 493     {
 494         wxRect oldRect = m_tabView->GetViewRect();
 495
 496         int cw, ch;
 497         GetClientSize(& cw, & ch);
 498
 499         int tabHeight = m_tabView->GetTotalTabHeight();
 500         wxRect rect;
 501         rect.x = 4;
 502         rect.y = tabHeight + 4;
 503         rect.width = cw - 8;
 504         rect.height = ch - 4 - rect.y ;
 505
 506         m_tabView->SetViewRect(rect);
 507
 508         m_tabView->LayoutTabs();
 509
 510         // Need to do it a 2nd time to get the tab height with
 511         // the new view width, since changing the view width changes the
 512         // tab layout.
 513         tabHeight = m_tabView->GetTotalTabHeight();
 514         rect.x = 4;
 515         rect.y = tabHeight + 4;
 516         rect.width = cw - 8;
 517         rect.height = ch - 4 - rect.y ;
 518
 519         m_tabView->SetViewRect(rect);
 520
 521         m_tabView->LayoutTabs();
 522
 523         if (!force && (rect == oldRect))
 524           return false;
 525
 526         // fit the notebook page to the tab control's display area
 527
 528         size_t nCount = m_pages.Count();
 529         for ( size_t nPage = 0; nPage < nCount; nPage++ ) {
 530             wxNotebookPage *pPage = m_pages[nPage];
 531             wxRect clientRect = GetAvailableClientSize();
 532             if (pPage->IsShown())
 533             {
 534                 pPage->SetSize(clientRect.x, clientRect.y, clientRect.width, clientRect.height);
 535                 if ( pPage->GetAutoLayout() )
 536                    pPage->Layout();
 537             }
 538         }
 539         Refresh();
 540     }
 541     return true;
 542 }
 543
 544 void wxNotebook::OnSelChange(wxNotebookEvent& event)
 545 {
 546     // is it our tab control?
 547     if ( event.GetEventObject() == this )
 548     {
 549         if (event.GetSelection() != m_nSelection)
 550           ChangePage(event.GetOldSelection(), event.GetSelection());
 551     }
 552
 553     // we want to give others a chance to process this message as well
 554     event.Skip();
 555 }
 556
 557 void wxNotebook::OnSetFocus(wxFocusEvent& event)
 558 {
 559     // set focus to the currently selected page if any
 560     if ( m_nSelection != -1 )
 561         m_pages[m_nSelection]->SetFocus();
 562
 563     event.Skip();
 564 }
 565
 566 void wxNotebook::OnNavigationKey(wxNavigationKeyEvent& event)
 567 {
 568     if ( event.IsWindowChange() ) {
 569         // change pages
 570         AdvanceSelection(event.GetDirection());
 571     }
 572     else {
 573         // pass to the parent
 574         if ( GetParent() ) {
 575             event.SetCurrentFocus(this);
 576             GetParent()->ProcessEvent(event);
 577         }
 578     }
 579 }
 580
 581 // ----------------------------------------------------------------------------
 582 // wxNotebook base class virtuals
 583 // ----------------------------------------------------------------------------
 584
 585 // override these 2 functions to do nothing: everything is done in OnSize
 586
 587 void wxNotebook::SetConstraintSizes(bool /* recurse */)
 588 {
 589     // don't set the sizes of the pages - their correct size is not yet known
 590     wxControl::SetConstraintSizes(false);
 591 }
 592
 593 bool wxNotebook::DoPhase(int /* nPhase */)
 594 {
 595     return true;
 596 }
 597
 598 void wxNotebook::Command(wxCommandEvent& WXUNUSED(event))
 599 {
 600     wxFAIL_MSG(wxT("wxNotebook::Command not implemented"));
 601 }
 602
 603 // ----------------------------------------------------------------------------
 604 // wxNotebook helper functions
 605 // ----------------------------------------------------------------------------
 606
 607 // hide the currently active panel and show the new one
 608 void wxNotebook::ChangePage(int nOldSel, int nSel)
 609 {
 610   //  cout << "ChangePage: " << nOldSel << ", " << nSel << "\n";
 611     wxASSERT( nOldSel != nSel ); // impossible
 612
 613     if ( nOldSel != -1 ) {
 614         m_pages[nOldSel]->Show(false);
 615         m_pages[nOldSel]->Lower();
 616     }
 617
 618     wxNotebookPage *pPage = m_pages[nSel];
 619
 620     wxRect clientRect = GetAvailableClientSize();
 621     pPage->SetSize(clientRect.x, clientRect.y, clientRect.width, clientRect.height);
 622
 623     Refresh();
 624
 625     pPage->Show(true);
 626     pPage->Raise();
 627     pPage->SetFocus();
 628
 629     m_nSelection = nSel;
 630 }
 631
 632 void wxNotebook::OnMouseEvent(wxMouseEvent& event)
 633 {
 634   if (m_tabView)
 635     m_tabView->OnEvent(event);
 636 }
 637
 638 void wxNotebook::OnPaint(wxPaintEvent& WXUNUSED(event) )
 639 {
 640     wxPaintDC dc(this);
 641     if (m_tabView)
 642         m_tabView->Draw(dc);
 643 }
 644
 645 wxSize wxNotebook::CalcSizeFromPage(const wxSize& sizePage) const
 646 {
 647     // MBN: since the total tab height is really a function of the
 648     // width, this should really call
 649     // GetTotalTabHeightPretendingWidthIs(), but the current
 650     // implementation will suffice, provided the wxNotebook has been
 651     // created with a sensible initial width.
 652     return wxSize( sizePage.x + 12,
 653                    sizePage.y + m_tabView->GetTotalTabHeight() + 6 + 4 );
 654 }
 655
 656 wxRect wxNotebook::GetAvailableClientSize()
 657 {
 658     int cw, ch;
 659     GetClientSize(& cw, & ch);
 660
 661     int tabHeight = m_tabView->GetTotalTabHeight();
 662
 663     // TODO: these margins should be configurable.
 664     wxRect rect;
 665     rect.x = 6;
 666     rect.y = tabHeight + 6;
 667     rect.width = cw - 12;
 668     rect.height = ch - 4 - rect.y ;
 669
 670     return rect;
 671 }
 672
 673 /*
 674  * wxNotebookTabView
 675  */
 676
 677 IMPLEMENT_CLASS(wxNotebookTabView, wxTabView)
 678
 679 wxNotebookTabView::wxNotebookTabView(wxNotebook *notebook, long style)
 680     : wxTabView(style), m_nextid(1)
 681 {
 682   m_notebook = notebook;
 683
 684   m_notebook->SetTabView(this);
 685
 686   SetWindow(m_notebook);
 687 }
 688
 689 wxNotebookTabView::~wxNotebookTabView(void)
 690 {
 691 }
 692
 693 int wxNotebookTabView::GetId(wxNotebookPage *page)
 694 {
 695     int& id = m_pageToId[page];
 696
 697     if (!id)
 698     {
 699         id = m_nextid++;
 700         m_idToPage[id] = page;
 701     }
 702
 703     return id;
 704 }
 705
 706 // Called when a tab is activated
 707 void wxNotebookTabView::OnTabActivate(int activateId, int deactivateId)
 708 {
 709   if (!m_notebook)
 710     return;
 711
 712   wxNotebookEvent event(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED, m_notebook->GetId());
 713
 714   // Translate from wxTabView's ids (which aren't position-dependent)
 715   // to wxNotebook's (which are).
 716   wxNotebookPage* pActive = GetPage(activateId);
 717   wxNotebookPage* pDeactive = GetPage(deactivateId);
 718
 719   int activatePos = m_notebook->FindPagePosition(pActive);
 720   int deactivatePos = m_notebook->FindPagePosition(pDeactive);
 721
 722   event.SetEventObject(m_notebook);
 723   event.SetSelection(activatePos);
 724   event.SetOldSelection(deactivatePos);
 725   m_notebook->GetEventHandler()->ProcessEvent(event);
 726 }
 727
 728 // Allows Vetoing
 729 bool wxNotebookTabView::OnTabPreActivate(int activateId, int deactivateId)
 730 {
 731   bool retval = true;
 732
 733   if (m_notebook)
 734   {
 735     wxNotebookEvent event(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGING, m_notebook->GetId());
 736
 737     // Translate from wxTabView's ids (which aren't position-dependent)
 738     // to wxNotebook's (which are).
 739     wxNotebookPage* pActive = GetPage(activateId);
 740     wxNotebookPage* pDeactive = GetPage(deactivateId);
 741
 742     int activatePos = m_notebook->FindPagePosition(pActive);
 743     int deactivatePos = m_notebook->FindPagePosition(pDeactive);
 744
 745     event.SetEventObject(m_notebook);
 746     event.SetSelection(activatePos);
 747     event.SetOldSelection(deactivatePos);
 748     if (m_notebook->GetEventHandler()->ProcessEvent(event))
 749     {
 750       retval = event.IsAllowed();
 751     }
 752   }
 753   return retval;
 754 }
 755
 756 #endif // wxUSE_NOTEBOOK