src/generic/treebkg.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/treebkg.cpp
   3 // Purpose:     generic implementation of wxTreebook
   4 // Author:      Evgeniy Tarassov, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2005-09-15
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2005 Vadim Zeitlin <vadim@wxwidgets.org>
   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_TREEBOOK
  28
  29 #include "wx/treebook.h"
  30 #include "wx/imaglist.h"
  31 #include "wx/settings.h"
  32
  33 // ----------------------------------------------------------------------------
  34 // various wxWidgets macros
  35 // ----------------------------------------------------------------------------
  36
  37 // check that the page index is valid
  38 #define IS_VALID_PAGE(nPage) ((nPage) < DoInternalGetPageCount())
  39
  40 // ----------------------------------------------------------------------------
  41 // event table
  42 // ----------------------------------------------------------------------------
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxTreebook, wxBookCtrlBase)
  45 IMPLEMENT_DYNAMIC_CLASS(wxTreebookEvent, wxNotifyEvent)
  46
  47 #if !WXWIN_COMPATIBILITY_EVENT_TYPES
  48 const wxEventType wxEVT_COMMAND_TREEBOOK_PAGE_CHANGING = wxNewEventType();
  49 const wxEventType wxEVT_COMMAND_TREEBOOK_PAGE_CHANGED = wxNewEventType();
  50 const wxEventType wxEVT_COMMAND_TREEBOOK_NODE_COLLAPSED = wxNewEventType();
  51 const wxEventType wxEVT_COMMAND_TREEBOOK_NODE_EXPANDED = wxNewEventType();
  52 #endif
  53 const int wxID_TREEBOOKTREEVIEW = wxNewId();
  54
  55 BEGIN_EVENT_TABLE(wxTreebook, wxBookCtrlBase)
  56     EVT_TREE_SEL_CHANGED   (wxID_TREEBOOKTREEVIEW, wxTreebook::OnTreeSelectionChange)
  57     EVT_TREE_ITEM_EXPANDED (wxID_TREEBOOKTREEVIEW, wxTreebook::OnTreeNodeExpandedCollapsed)
  58     EVT_TREE_ITEM_COLLAPSED(wxID_TREEBOOKTREEVIEW, wxTreebook::OnTreeNodeExpandedCollapsed)
  59 END_EVENT_TABLE()
  60
  61 // ============================================================================
  62 // wxTreebook implementation
  63 // ============================================================================
  64
  65 // ----------------------------------------------------------------------------
  66 // wxTreebook creation
  67 // ----------------------------------------------------------------------------
  68
  69 void wxTreebook::Init()
  70 {
  71     m_selection =
  72     m_actualSelection = wxNOT_FOUND;
  73 }
  74
  75 bool
  76 wxTreebook::Create(wxWindow *parent,
  77                    wxWindowID id,
  78                    const wxPoint& pos,
  79                    const wxSize& size,
  80                    long style,
  81                    const wxString& name)
  82 {
  83     // Check the style flag to have either wxTBK_RIGHT or wxTBK_LEFT
  84     if ( (style & wxBK_ALIGN_MASK) == wxBK_DEFAULT )
  85     {
  86         style |= wxBK_LEFT;
  87     }
  88
  89     // no border for this control, it doesn't look nice together with the tree
  90     style &= ~wxBORDER_MASK;
  91     style |= wxBORDER_NONE;
  92
  93     if ( !wxControl::Create(parent, id, pos, size,
  94                             style, wxDefaultValidator, name) )
  95         return false;
  96
  97     m_bookctrl = new wxTreeCtrl
  98                  (
  99                     this,
 100                     wxID_TREEBOOKTREEVIEW,
 101                     wxDefaultPosition,
 102                     wxDefaultSize,
 103                     wxBORDER_SIMPLE |
 104                     wxTR_DEFAULT_STYLE |
 105                     wxTR_HIDE_ROOT |
 106                     wxTR_SINGLE
 107                  );
 108     GetTreeCtrl()->SetQuickBestSize(false); // do full size calculation
 109     GetTreeCtrl()->AddRoot(wxEmptyString); // label doesn't matter, it's hidden
 110
 111 #ifdef __WXMSW__
 112     // We need to add dummy size event to force possible scrollbar hiding
 113     wxSizeEvent evt;
 114     GetEventHandler()->AddPendingEvent(evt);
 115 #endif
 116
 117     return true;
 118 }
 119
 120
 121 // insert a new page just before the pagePos
 122 bool wxTreebook::InsertPage(size_t pagePos,
 123                             wxWindow *page,
 124                             const wxString& text,
 125                             bool bSelect,
 126                             int imageId)
 127 {
 128     return DoInsertPage(pagePos, page, text, bSelect, imageId);
 129 }
 130
 131 bool wxTreebook::InsertSubPage(size_t pagePos,
 132                                wxWindow *page,
 133                                const wxString& text,
 134                                bool bSelect,
 135                                int imageId)
 136 {
 137     return DoInsertSubPage(pagePos, page, text, bSelect, imageId);
 138 }
 139
 140 bool wxTreebook::AddPage(wxWindow *page, const wxString& text, bool bSelect,
 141                          int imageId)
 142 {
 143     return DoInsertPage(m_treeIds.GetCount(), page, text, bSelect, imageId);
 144 }
 145
 146 // insertion time is linear to the number of top-pages
 147 bool wxTreebook::AddSubPage(wxWindow *page, const wxString& text, bool bSelect, int imageId)
 148 {
 149     return DoAddSubPage(page, text, bSelect, imageId);
 150 }
 151
 152
 153 bool wxTreebook::DoInsertPage(size_t pagePos,
 154                               wxWindow *page,
 155                               const wxString& text,
 156                               bool bSelect,
 157                               int imageId)
 158 {
 159     wxCHECK_MSG( pagePos <= DoInternalGetPageCount(), false,
 160                         wxT("Invalid treebook page position") );
 161
 162     if ( !wxBookCtrlBase::InsertPage(pagePos, page, text, bSelect, imageId) )
 163         return false;
 164
 165     wxTreeCtrl *tree = GetTreeCtrl();
 166     wxTreeItemId newId;
 167     if ( pagePos == DoInternalGetPageCount() )
 168     {
 169         // append the page to the end
 170         wxTreeItemId rootId = tree->GetRootItem();
 171
 172         newId = tree->AppendItem(rootId, text, imageId);
 173     }
 174     else // insert the new page before the given one
 175     {
 176         wxTreeItemId nodeId = m_treeIds[pagePos];
 177
 178         wxTreeItemId previousId = tree->GetPrevSibling(nodeId);
 179         wxTreeItemId parentId = tree->GetItemParent(nodeId);
 180
 181         if ( previousId.IsOk() )
 182         {
 183             // insert before the sibling - previousId
 184             newId = tree->InsertItem(parentId, previousId, text, imageId);
 185         }
 186         else // no prev siblings -- insert as a first child
 187         {
 188             wxASSERT_MSG( parentId.IsOk(), wxT( "Tree has no root node?" ) );
 189
 190             newId = tree->PrependItem(parentId, text, imageId);
 191         }
 192     }
 193
 194     if ( !newId.IsOk() )
 195     {
 196         //something wrong -> cleaning and returning with false
 197         (void)wxBookCtrlBase::DoRemovePage(pagePos);
 198
 199         wxFAIL_MSG( wxT("Failed to insert treebook page") );
 200         return false;
 201     }
 202
 203     DoInternalAddPage(pagePos, page, newId);
 204
 205     DoUpdateSelection(bSelect, pagePos);
 206
 207     return true;
 208 }
 209
 210 bool wxTreebook::DoAddSubPage(wxWindow *page, const wxString& text, bool bSelect, int imageId)
 211 {
 212     wxTreeCtrl *tree = GetTreeCtrl();
 213
 214     wxTreeItemId rootId = tree->GetRootItem();
 215
 216     wxTreeItemId lastNodeId = tree->GetLastChild(rootId);
 217
 218     wxCHECK_MSG( lastNodeId.IsOk(), false,
 219                         _T("Can't insert sub page when there are no pages") );
 220
 221     // now calculate its position (should we save/update it too?)
 222     size_t newPos = tree->GetCount() -
 223                         (tree->GetChildrenCount(lastNodeId, true) + 1);
 224
 225     return DoInsertSubPage(newPos, page, text, bSelect, imageId);
 226 }
 227
 228 bool wxTreebook::DoInsertSubPage(size_t pagePos,
 229                                  wxTreebookPage *page,
 230                                  const wxString& text,
 231                                  bool bSelect,
 232                                  int imageId)
 233 {
 234     wxTreeItemId parentId = DoInternalGetPage(pagePos);
 235     wxCHECK_MSG( parentId.IsOk(), false, wxT("invalid tree item") );
 236
 237     wxTreeCtrl *tree = GetTreeCtrl();
 238
 239     size_t newPos = pagePos + tree->GetChildrenCount(parentId, true) + 1;
 240     wxASSERT_MSG( newPos <= DoInternalGetPageCount(),
 241                     wxT("Internal error in tree insert point calculation") );
 242
 243     if ( !wxBookCtrlBase::InsertPage(newPos, page, text, bSelect, imageId) )
 244         return false;
 245
 246     wxTreeItemId newId = tree->AppendItem(parentId, text, imageId);
 247
 248     tree->InvalidateBestSize();
 249
 250     if ( !newId.IsOk() )
 251     {
 252         (void)wxBookCtrlBase::DoRemovePage(newPos);
 253
 254         wxFAIL_MSG( wxT("Failed to insert treebook page") );
 255         return false;
 256     }
 257
 258     DoInternalAddPage(newPos, page, newId);
 259
 260     DoUpdateSelection(bSelect, newPos);
 261
 262     return true;
 263 }
 264
 265 bool wxTreebook::DeletePage(size_t pagePos)
 266 {
 267     wxCHECK_MSG( IS_VALID_PAGE(pagePos), false, wxT("Invalid tree index") );
 268
 269     wxTreebookPage *oldPage = DoRemovePage(pagePos);
 270     if ( !oldPage )
 271         return false;
 272
 273     delete oldPage;
 274
 275     return true;
 276 }
 277
 278 wxTreebookPage *wxTreebook::DoRemovePage(size_t pagePos)
 279 {
 280     wxTreeItemId pageId = DoInternalGetPage(pagePos);
 281     wxCHECK_MSG( pageId.IsOk(), NULL, wxT("Invalid tree index") );
 282
 283     wxTreebookPage * oldPage = GetPage(pagePos);
 284     wxTreeCtrl *tree = GetTreeCtrl();
 285
 286     size_t subCount = tree->GetChildrenCount(pageId, true);
 287     wxASSERT_MSG ( IS_VALID_PAGE(pagePos + subCount),
 288                         wxT("Internal error in wxTreebook::DoRemovePage") );
 289
 290     // here we are going to delete ALL the pages in the range
 291     // [pagePos, pagePos + subCount] -- the page and its children
 292
 293     // deleting all the pages from the base class
 294     for ( size_t i = 0; i <= subCount; ++i )
 295     {
 296         wxTreebookPage *page = wxBookCtrlBase::DoRemovePage(pagePos);
 297
 298         // don't delete the page itself though -- it will be deleted in
 299         // DeletePage() when we return
 300         if ( i )
 301         {
 302             delete page;
 303         }
 304     }
 305
 306     DoInternalRemovePageRange(pagePos, subCount);
 307
 308     tree->DeleteChildren( pageId );
 309     tree->Delete( pageId );
 310
 311     return oldPage;
 312 }
 313
 314 bool wxTreebook::DeleteAllPages()
 315 {
 316     wxBookCtrlBase::DeleteAllPages();
 317     m_treeIds.Clear();
 318     m_selection =
 319     m_actualSelection = wxNOT_FOUND;
 320
 321     wxTreeCtrl *tree = GetTreeCtrl();
 322     tree->DeleteChildren(tree->GetRootItem());
 323
 324     return true;
 325 }
 326
 327 void wxTreebook::DoInternalAddPage(size_t newPos,
 328                                    wxTreebookPage *page,
 329                                    wxTreeItemId pageId)
 330 {
 331     wxASSERT_MSG( newPos <= m_treeIds.GetCount(), wxT("Ivalid index passed to wxTreebook::DoInternalAddPage") );
 332
 333     // hide newly inserted page initially (it will be shown when selected)
 334     if ( page )
 335         page->Hide();
 336
 337     if ( newPos == m_treeIds.GetCount() )
 338     {
 339         // append
 340         m_treeIds.Add(pageId);
 341     }
 342     else // insert
 343     {
 344         m_treeIds.Insert(pageId, newPos);
 345
 346         if ( m_selection != wxNOT_FOUND && newPos <= (size_t)m_selection )
 347         {
 348             // selection has been moved one unit toward the end
 349             ++m_selection;
 350             if ( m_actualSelection != wxNOT_FOUND )
 351                 ++m_actualSelection;
 352         }
 353         else if ( m_actualSelection != wxNOT_FOUND &&
 354                     newPos <= (size_t)m_actualSelection )
 355         {
 356             DoSetSelection(m_selection);
 357         }
 358     }
 359 }
 360
 361 void wxTreebook::DoInternalRemovePageRange(size_t pagePos, size_t subCount)
 362 {
 363     // Attention: this function is only for a situation when we delete a node
 364     // with all its children so pagePos is the node's index and subCount is the
 365     // node children count
 366     wxASSERT_MSG( pagePos + subCount < m_treeIds.GetCount(),
 367                     wxT("Ivalid page index") );
 368
 369     wxTreeItemId pageId = m_treeIds[pagePos];
 370
 371     m_treeIds.RemoveAt(pagePos, subCount + 1);
 372
 373     if ( m_selection != wxNOT_FOUND )
 374     {
 375         if ( (size_t)m_selection > pagePos + subCount)
 376         {
 377             // selection is far after the deleted page, so just update the index and move on
 378             m_selection -= 1 + subCount;
 379             if ( m_actualSelection != wxNOT_FOUND)
 380             {
 381                 m_actualSelection -= subCount + 1;
 382             }
 383         }
 384         else if ( (size_t)m_selection >= pagePos )
 385         {
 386             wxTreeCtrl *tree = GetTreeCtrl();
 387
 388             // as selected page is going to be deleted, try to select the next
 389             // sibling if exists, if not then the parent
 390             wxTreeItemId nodeId = tree->GetNextSibling(pageId);
 391
 392             m_selection = wxNOT_FOUND;
 393             m_actualSelection = wxNOT_FOUND;
 394
 395             if ( nodeId.IsOk() )
 396             {
 397                 // selecting next siblings
 398                 tree->SelectItem(nodeId);
 399             }
 400             else // no next sibling, select the parent
 401             {
 402                 wxTreeItemId parentId = tree->GetItemParent(pageId);
 403
 404                 if ( parentId.IsOk() && parentId != tree->GetRootItem() )
 405                 {
 406                     tree->SelectItem(parentId);
 407                 }
 408                 else // parent is root
 409                 {
 410                     // we can't select it as it's hidden
 411                     DoUpdateSelection(false, wxNOT_FOUND);
 412                 }
 413             }
 414         }
 415         else if ( m_actualSelection != wxNOT_FOUND &&
 416                     (size_t)m_actualSelection >= pagePos )
 417         {
 418             // nothing to do -- selection is before the deleted node, but
 419             // actually shown page (the first (sub)child with page != NULL) is
 420             // already deleted
 421             m_actualSelection = m_selection;
 422             DoSetSelection(m_selection);
 423         }
 424         //else: nothing to do -- selection is before the deleted node
 425     }
 426     else
 427     {
 428         DoUpdateSelection(false, wxNOT_FOUND);
 429     }
 430 }
 431
 432
 433 void wxTreebook::DoUpdateSelection(bool bSelect, int newPos)
 434 {
 435     int newSelPos;
 436     if ( bSelect )
 437     {
 438         newSelPos = newPos;
 439     }
 440     else if ( m_selection == wxNOT_FOUND && DoInternalGetPageCount() > 0 )
 441     {
 442         newSelPos = 0;
 443     }
 444     else
 445     {
 446         newSelPos = wxNOT_FOUND;
 447     }
 448
 449     if ( newSelPos != wxNOT_FOUND )
 450     {
 451         SetSelection((size_t)newSelPos);
 452     }
 453 }
 454
 455 wxTreeItemId wxTreebook::DoInternalGetPage(size_t pagePos) const
 456 {
 457     if ( pagePos >= m_treeIds.GetCount() )
 458     {
 459         // invalid position but ok here, in this internal function, don't assert
 460         // (the caller will do it)
 461         return wxTreeItemId();
 462     }
 463
 464     return m_treeIds[pagePos];
 465 }
 466
 467 int wxTreebook::DoInternalFindPageById(wxTreeItemId pageId) const
 468 {
 469     const size_t count = m_treeIds.GetCount();
 470     for ( size_t i = 0; i < count; ++i )
 471     {
 472         if ( m_treeIds[i] == pageId )
 473             return i;
 474     }
 475
 476     return wxNOT_FOUND;
 477 }
 478
 479 bool wxTreebook::IsNodeExpanded(size_t pagePos) const
 480 {
 481     wxTreeItemId pageId = DoInternalGetPage(pagePos);
 482
 483     wxCHECK_MSG( pageId.IsOk(), false, wxT("invalid tree item") );
 484
 485     return GetTreeCtrl()->IsExpanded(pageId);
 486 }
 487
 488 bool wxTreebook::ExpandNode(size_t pagePos, bool expand)
 489 {
 490     wxTreeItemId pageId = DoInternalGetPage(pagePos);
 491
 492     wxCHECK_MSG( pageId.IsOk(), false, wxT("invalid tree item") );
 493
 494     if ( expand )
 495     {
 496         GetTreeCtrl()->Expand( pageId );
 497     }
 498     else // collapse
 499     {
 500         GetTreeCtrl()->Collapse( pageId );
 501
 502         // rely on the events generated by wxTreeCtrl to update selection
 503     }
 504
 505     return true;
 506 }
 507
 508 int wxTreebook::GetPageParent(size_t pagePos) const
 509 {
 510     wxTreeItemId nodeId = DoInternalGetPage( pagePos );
 511     wxCHECK_MSG( nodeId.IsOk(), wxNOT_FOUND, wxT("Invalid page index spacified!") );
 512
 513     const wxTreeItemId parent = GetTreeCtrl()->GetItemParent( nodeId );
 514
 515     return parent.IsOk() ? DoInternalFindPageById(parent) : wxNOT_FOUND;
 516 }
 517
 518 bool wxTreebook::SetPageText(size_t n, const wxString& strText)
 519 {
 520     wxTreeItemId pageId = DoInternalGetPage(n);
 521
 522     wxCHECK_MSG( pageId.IsOk(), false, wxT("invalid tree item") );
 523
 524     GetTreeCtrl()->SetItemText(pageId, strText);
 525
 526     return true;
 527 }
 528
 529 wxString wxTreebook::GetPageText(size_t n) const
 530 {
 531     wxTreeItemId pageId = DoInternalGetPage(n);
 532
 533     wxCHECK_MSG( pageId.IsOk(), wxString(), wxT("invalid tree item") );
 534
 535     return GetTreeCtrl()->GetItemText(pageId);
 536 }
 537
 538 int wxTreebook::GetPageImage(size_t n) const
 539 {
 540     wxTreeItemId pageId = DoInternalGetPage(n);
 541
 542     wxCHECK_MSG( pageId.IsOk(), wxNOT_FOUND, wxT("invalid tree item") );
 543
 544     return GetTreeCtrl()->GetItemImage(pageId);
 545 }
 546
 547 bool wxTreebook::SetPageImage(size_t n, int imageId)
 548 {
 549     wxTreeItemId pageId = DoInternalGetPage(n);
 550
 551     wxCHECK_MSG( pageId.IsOk(), false, wxT("invalid tree item") );
 552
 553     GetTreeCtrl()->SetItemImage(pageId, imageId);
 554
 555     return true;
 556 }
 557
 558 wxSize wxTreebook::CalcSizeFromPage(const wxSize& sizePage) const
 559 {
 560     const wxSize sizeTree = GetControllerSize();
 561
 562     wxSize size = sizePage;
 563     size.x += sizeTree.x;
 564
 565     return size;
 566 }
 567
 568 int wxTreebook::GetSelection() const
 569 {
 570    return m_selection;
 571 }
 572
 573 int wxTreebook::SetSelection(size_t pagePos)
 574 {
 575    if ( (size_t)m_selection != pagePos )
 576        return DoSetSelection(pagePos);
 577
 578    return m_selection;
 579 }
 580
 581 int wxTreebook::DoSetSelection(size_t pagePos)
 582 {
 583     wxCHECK_MSG( IS_VALID_PAGE(pagePos), wxNOT_FOUND,
 584                  wxT("invalid page index in wxListbook::SetSelection()") );
 585     wxASSERT_MSG( GetPageCount() == DoInternalGetPageCount(),
 586                   wxT("wxTreebook logic error: m_treeIds and m_pages not in sync!"));
 587
 588     const int oldSel = m_selection;
 589     wxTreeCtrl *tree = GetTreeCtrl();
 590
 591     wxTreebookEvent event(wxEVT_COMMAND_TREEBOOK_PAGE_CHANGING, m_windowId);
 592     event.SetEventObject(this);
 593     event.SetSelection(pagePos);
 594     event.SetOldSelection(m_selection);
 595
 596     // don't send the event if the old and new pages are the same; do send it
 597     // otherwise and be prepared for it to be vetoed
 598     if ( (int)pagePos == m_selection ||
 599             !GetEventHandler()->ProcessEvent(event) ||
 600                 event.IsAllowed() )
 601     {
 602         // hide the previously shown page
 603         wxTreebookPage * const oldPage = DoGetCurrentPage();
 604         if ( oldPage )
 605             oldPage->Hide();
 606
 607         // then show the new one
 608         m_selection = pagePos;
 609         wxTreebookPage *page = wxBookCtrlBase::GetPage(m_selection);
 610         if ( !page )
 611         {
 612             // find the next page suitable to be shown: the first (grand)child
 613             // of this one with a non-NULL associated page
 614             wxTreeItemId childId = m_treeIds[pagePos];
 615             int actualPagePos = pagePos;
 616             while ( !page && childId.IsOk() )
 617             {
 618                 wxTreeItemIdValue cookie;
 619                 childId = tree->GetFirstChild( childId, cookie );
 620                 if ( childId.IsOk() )
 621                 {
 622                     page = wxBookCtrlBase::GetPage(++actualPagePos);
 623                 }
 624             }
 625
 626             m_actualSelection = page ? actualPagePos : m_selection;
 627         }
 628
 629         if ( page )
 630             page->Show();
 631
 632         tree->SelectItem(DoInternalGetPage(pagePos));
 633
 634         // notify about the (now completed) page change
 635         event.SetEventType(wxEVT_COMMAND_TREEBOOK_PAGE_CHANGED);
 636         (void)GetEventHandler()->ProcessEvent(event);
 637     }
 638     else // page change vetoed
 639     {
 640         // tree selection might have already had changed
 641         tree->SelectItem(DoInternalGetPage(oldSel));
 642     }
 643
 644     return oldSel;
 645 }
 646
 647 void wxTreebook::SetImageList(wxImageList *imageList)
 648 {
 649     wxBookCtrlBase::SetImageList(imageList);
 650     GetTreeCtrl()->SetImageList(imageList);
 651 }
 652
 653 void wxTreebook::AssignImageList(wxImageList *imageList)
 654 {
 655     wxBookCtrlBase::AssignImageList(imageList);
 656     GetTreeCtrl()->SetImageList(imageList);
 657 }
 658
 659 // ----------------------------------------------------------------------------
 660 // event handlers
 661 // ----------------------------------------------------------------------------
 662
 663 void wxTreebook::OnTreeSelectionChange(wxTreeEvent& event)
 664 {
 665     wxTreeItemId newId = event.GetItem();
 666
 667     if ( (m_selection == wxNOT_FOUND &&
 668                 (!newId.IsOk() || newId == GetTreeCtrl()->GetRootItem())) ||
 669             (m_selection != wxNOT_FOUND && newId == m_treeIds[m_selection]) )
 670     {
 671         // this event can only come when we modify the tree selection ourselves
 672         // so we should simply ignore it
 673         return;
 674     }
 675
 676     int newPos = DoInternalFindPageById(newId);
 677
 678     if ( newPos != wxNOT_FOUND )
 679         SetSelection( newPos );
 680 }
 681
 682 void wxTreebook::OnTreeNodeExpandedCollapsed(wxTreeEvent & event)
 683 {
 684     wxTreeItemId nodeId = event.GetItem();
 685     if ( !nodeId.IsOk() || nodeId == GetTreeCtrl()->GetRootItem() )
 686         return;
 687     int pagePos = DoInternalFindPageById(nodeId);
 688     wxCHECK_RET( pagePos != wxNOT_FOUND, wxT("Internal problem in wxTreebook!..") );
 689
 690     wxTreebookEvent ev(GetTreeCtrl()->IsExpanded(nodeId)
 691             ? wxEVT_COMMAND_TREEBOOK_NODE_EXPANDED
 692             : wxEVT_COMMAND_TREEBOOK_NODE_COLLAPSED,
 693         m_windowId);
 694
 695     ev.SetSelection(pagePos);
 696     ev.SetOldSelection(pagePos);
 697     ev.SetEventObject(this);
 698
 699     GetEventHandler()->ProcessEvent(ev);
 700 }
 701
 702 // ----------------------------------------------------------------------------
 703 // wxTreebook geometry management
 704 // ----------------------------------------------------------------------------
 705
 706 wxTreebookPage * wxTreebook::DoGetCurrentPage() const
 707 {
 708     if ( m_selection == wxNOT_FOUND )
 709         return NULL;
 710
 711     wxTreebookPage *page = wxBookCtrlBase::GetPage(m_selection);
 712     if ( !page && m_actualSelection != wxNOT_FOUND )
 713     {
 714         page = wxBookCtrlBase::GetPage(m_actualSelection);
 715     }
 716
 717     return page;
 718 }
 719
 720 #endif // wxUSE_TREEBOOK