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 BEGIN_EVENT_TABLE(wxNotebook, wxBookCtrlBase)
  53     EVT_NOTEBOOK_PAGE_CHANGED(wxID_ANY, wxNotebook::OnSelChange)
  54     EVT_SIZE(wxNotebook::OnSize)
  55     EVT_PAINT(wxNotebook::OnPaint)
  56     EVT_MOUSE_EVENTS(wxNotebook::OnMouseEvent)
  57     EVT_SET_FOCUS(wxNotebook::OnSetFocus)
  58     EVT_NAVIGATION_KEY(wxNotebook::OnNavigationKey)
  59 END_EVENT_TABLE()
  60
  61 // ============================================================================
  62 // implementation
  63 // ============================================================================
  64
  65 // ============================================================================
  66 // Private class
  67 // ============================================================================
  68
  69 WX_DECLARE_HASH_MAP(int, wxNotebookPage*, wxIntegerHash, wxIntegerEqual,
  70                     wxIntToNotebookPageHashMap);
  71
  72 WX_DECLARE_HASH_MAP(wxNotebookPage*, int, wxPointerHash, wxPointerEqual,
  73                     wxNotebookPageToIntHashMap);
  74
  75 // This reuses wxTabView to draw the tabs.
  76 class WXDLLEXPORT wxNotebookTabView: public wxTabView
  77 {
  78 DECLARE_DYNAMIC_CLASS(wxNotebookTabView)
  79 public:
  80     wxNotebookTabView(wxNotebook* notebook, long style = wxTAB_STYLE_DRAW_BOX | wxTAB_STYLE_COLOUR_INTERIOR);
  81     virtual ~wxNotebookTabView(void);
  82
  83     // Called when a tab is activated
  84     virtual void OnTabActivate(int activateId, int deactivateId);
  85     // Allows vetoing
  86     virtual bool OnTabPreActivate(int activateId, int deactivateId);
  87
  88     // map integer ids used by wxTabView to wxNotebookPage pointers
  89     int GetId(wxNotebookPage *page);
  90     wxNotebookPage *GetPage(int id) { return m_idToPage[id]; }
  91
  92 protected:
  93     wxNotebook* m_notebook;
  94
  95 private:
  96     wxIntToNotebookPageHashMap m_idToPage;
  97     wxNotebookPageToIntHashMap m_pageToId;
  98     int m_nextid;
  99 };
 100
 101 static int GetPageId(wxTabView *tabview, wxNotebookPage *page)
 102 {
 103     return static_cast<wxNotebookTabView*>(tabview)->GetId(page);
 104 }
 105
 106 // ----------------------------------------------------------------------------
 107 // wxNotebook construction
 108 // ----------------------------------------------------------------------------
 109
 110 // common part of all ctors
 111 void wxNotebook::Init()
 112 {
 113     m_tabView = NULL;
 114     m_selection = -1;
 115 }
 116
 117 // default for dynamic class
 118 wxNotebook::wxNotebook()
 119 {
 120     Init();
 121 }
 122
 123 // the same arguments as for wxControl
 124 wxNotebook::wxNotebook(wxWindow *parent,
 125                        wxWindowID id,
 126                        const wxPoint& pos,
 127                        const wxSize& size,
 128                        long style,
 129                        const wxString& name)
 130 {
 131     Init();
 132
 133     Create(parent, id, pos, size, style, name);
 134 }
 135
 136 // Create() function
 137 bool wxNotebook::Create(wxWindow *parent,
 138                         wxWindowID id,
 139                         const wxPoint& pos,
 140                         const wxSize& size,
 141                         long style,
 142                         const wxString& name)
 143 {
 144     // base init
 145     SetName(name);
 146
 147     if ( (style & wxBK_ALIGN_MASK) == wxBK_DEFAULT )
 148         style |= wxBK_TOP;
 149
 150     m_windowId = id == wxID_ANY ? NewControlId() : id;
 151
 152     if (!wxControl::Create(parent, id, pos, size, style|wxNO_BORDER, wxDefaultValidator, name))
 153         return false;
 154
 155     SetTabView(new wxNotebookTabView(this));
 156
 157     return true;
 158 }
 159
 160 // dtor
 161 wxNotebook::~wxNotebook()
 162 {
 163     delete m_tabView;
 164 }
 165
 166 // ----------------------------------------------------------------------------
 167 // wxNotebook accessors
 168 // ----------------------------------------------------------------------------
 169 int wxNotebook::GetRowCount() const
 170 {
 171     // TODO
 172     return 0;
 173 }
 174
 175 int wxNotebook::SetSelection(size_t nPage)
 176 {
 177     wxASSERT( IS_VALID_PAGE(nPage) );
 178
 179     wxNotebookPage* pPage = GetPage(nPage);
 180
 181     m_tabView->SetTabSelection(GetPageId(m_tabView, pPage));
 182
 183     // TODO
 184     return 0;
 185 }
 186
 187 int wxNotebook::ChangeSelection(size_t nPage)
 188 {
 189     // FIXME: currently it does generate events too
 190     return SetSelection(nPage);
 191 }
 192
 193 #if 0
 194 void wxNotebook::AdvanceSelection(bool bForward)
 195 {
 196     int nSel = GetSelection();
 197     int nMax = GetPageCount() - 1;
 198     if ( bForward )
 199         SetSelection(nSel == nMax ? 0 : nSel + 1);
 200     else
 201         SetSelection(nSel == 0 ? nMax : nSel - 1);
 202 }
 203 #endif
 204
 205 bool wxNotebook::SetPageText(size_t nPage, const wxString& strText)
 206 {
 207     wxASSERT( IS_VALID_PAGE(nPage) );
 208
 209     wxNotebookPage* page = GetPage(nPage);
 210     if (page)
 211     {
 212         m_tabView->SetTabText(GetPageId(m_tabView, page), strText);
 213         Refresh();
 214         return true;
 215     }
 216
 217     return false;
 218 }
 219
 220 wxString wxNotebook::GetPageText(size_t nPage) const
 221 {
 222     wxASSERT( IS_VALID_PAGE(nPage) );
 223
 224     wxNotebookPage* page = ((wxNotebook*)this)->GetPage(nPage);
 225     if (page)
 226         return m_tabView->GetTabText(GetPageId(m_tabView, page));
 227     else
 228         return wxEmptyString;
 229 }
 230
 231 int wxNotebook::GetPageImage(size_t WXUNUSED_UNLESS_DEBUG(nPage)) const
 232 {
 233     wxASSERT( IS_VALID_PAGE(nPage) );
 234
 235     // TODO
 236     return 0;
 237 }
 238
 239 bool wxNotebook::SetPageImage(size_t WXUNUSED_UNLESS_DEBUG(nPage),
 240                               int WXUNUSED(nImage))
 241 {
 242     wxASSERT( IS_VALID_PAGE(nPage) );
 243
 244     // TODO
 245     return false;
 246 }
 247
 248 // set the size (the same for all pages)
 249 void wxNotebook::SetPageSize(const wxSize& WXUNUSED(size))
 250 {
 251     // TODO
 252 }
 253
 254 // set the padding between tabs (in pixels)
 255 void wxNotebook::SetPadding(const wxSize& WXUNUSED(padding))
 256 {
 257     // TODO
 258 }
 259
 260 // set the size of the tabs for wxNB_FIXEDWIDTH controls
 261 void wxNotebook::SetTabSize(const wxSize& WXUNUSED(sz))
 262 {
 263     // TODO
 264 }
 265
 266 // ----------------------------------------------------------------------------
 267 // wxNotebook operations
 268 // ----------------------------------------------------------------------------
 269
 270 // remove one page from the notebook and delete it
 271 bool wxNotebook::DeletePage(size_t nPage)
 272 {
 273     wxCHECK( IS_VALID_PAGE(nPage), false );
 274
 275     if (m_selection != -1)
 276     {
 277         m_pages[m_selection]->Show(false);
 278         m_pages[m_selection]->Lower();
 279     }
 280
 281     wxNotebookPage* pPage = GetPage(nPage);
 282
 283     m_tabView->RemoveTab(GetPageId(m_tabView, pPage));
 284
 285     m_pages.Remove(pPage);
 286     delete pPage;
 287
 288     if (m_pages.GetCount() == 0)
 289     {
 290         m_selection = -1;
 291         m_tabView->SetTabSelection(-1, false);
 292     }
 293     else if (m_selection > -1)
 294     {
 295         m_selection = -1;
 296
 297         m_tabView->SetTabSelection(GetPageId(m_tabView, GetPage(0)), false);
 298
 299         if (m_selection != 0)
 300             ChangePage(-1, 0);
 301     }
 302
 303     RefreshLayout(false);
 304
 305     return true;
 306 }
 307
 308 bool wxNotebook::DeletePage(wxNotebookPage* page)
 309 {
 310     int pagePos = FindPagePosition(page);
 311     if (pagePos > -1)
 312         return DeletePage(pagePos);
 313     else
 314         return false;
 315 }
 316
 317 bool wxNotebook::RemovePage(size_t nPage)
 318 {
 319     return DoRemovePage(nPage) != NULL;
 320 }
 321
 322 // remove one page from the notebook
 323 wxWindow* wxNotebook::DoRemovePage(size_t nPage)
 324 {
 325     wxCHECK( IS_VALID_PAGE(nPage), NULL );
 326
 327     m_pages[nPage]->Show(false);
 328     //    m_pages[nPage]->Lower();
 329
 330     wxNotebookPage* pPage = GetPage(nPage);
 331
 332     m_tabView->RemoveTab(GetPageId(m_tabView, pPage));
 333
 334     m_pages.Remove(pPage);
 335
 336     if (m_pages.GetCount() == 0)
 337     {
 338       m_selection = -1;
 339       m_tabView->SetTabSelection(-1, true);
 340     }
 341     else if (m_selection > -1)
 342     {
 343       // Only change the selection if the page we
 344       // deleted was the selection.
 345       if (nPage == (size_t)m_selection)
 346       {
 347          m_selection = -1;
 348          // Select the first tab. Generates a ChangePage.
 349          m_tabView->SetTabSelection(0, true);
 350       }
 351       else
 352       {
 353         // We must adjust which tab we think is selected.
 354         // If greater than the page we deleted, it must be moved down
 355         // a notch.
 356         if (size_t(m_selection) > nPage)
 357           m_selection -- ;
 358       }
 359     }
 360
 361     RefreshLayout(false);
 362
 363     return pPage;
 364 }
 365
 366 bool wxNotebook::RemovePage(wxNotebookPage* page)
 367 {
 368     int pagePos = FindPagePosition(page);
 369     if (pagePos > -1)
 370         return RemovePage(pagePos);
 371     else
 372         return false;
 373 }
 374
 375 // Find the position of the wxNotebookPage, -1 if not found.
 376 int wxNotebook::FindPagePosition(wxNotebookPage* page) const
 377 {
 378     size_t nPageCount = GetPageCount();
 379     size_t nPage;
 380     for ( nPage = 0; nPage < nPageCount; nPage++ )
 381         if (m_pages[nPage] == page)
 382             return nPage;
 383     return -1;
 384 }
 385
 386 // remove all pages
 387 bool wxNotebook::DeleteAllPages()
 388 {
 389     m_tabView->ClearTabs(true);
 390
 391     size_t nPageCount = GetPageCount();
 392     size_t nPage;
 393     for ( nPage = 0; nPage < nPageCount; nPage++ )
 394         delete m_pages[nPage];
 395
 396     m_pages.Clear();
 397
 398     return true;
 399 }
 400
 401 // same as AddPage() but does it at given position
 402 bool wxNotebook::InsertPage(size_t nPage,
 403                             wxNotebookPage *pPage,
 404                             const wxString& strText,
 405                             bool bSelect,
 406                             int WXUNUSED(imageId))
 407 {
 408     wxASSERT( pPage != NULL );
 409     wxCHECK( IS_VALID_PAGE(nPage) || nPage == GetPageCount(), false );
 410
 411     m_tabView->AddTab(GetPageId(m_tabView, pPage), strText);
 412
 413     if (!bSelect)
 414       pPage->Show(false);
 415
 416     // save the pointer to the page
 417     m_pages.Insert(pPage, nPage);
 418
 419     if (bSelect)
 420     {
 421         // This will cause ChangePage to be called, via OnSelPage
 422
 423         m_tabView->SetTabSelection(GetPageId(m_tabView, pPage), true);
 424     }
 425
 426     // some page must be selected: either this one or the first one if there is
 427     // still no selection
 428     if ( m_selection == -1 )
 429       ChangePage(-1, 0);
 430
 431     RefreshLayout(false);
 432
 433     return true;
 434 }
 435
 436 // ----------------------------------------------------------------------------
 437 // wxNotebook callbacks
 438 // ----------------------------------------------------------------------------
 439
 440 // @@@ OnSize() is used for setting the font when it's called for the first
 441 //     time because doing it in ::Create() doesn't work (for unknown reasons)
 442 void wxNotebook::OnSize(wxSizeEvent& event)
 443 {
 444     static bool s_bFirstTime = true;
 445     if ( s_bFirstTime ) {
 446         // TODO: any first-time-size processing.
 447         s_bFirstTime = false;
 448     }
 449
 450     RefreshLayout();
 451
 452     // Processing continues to next OnSize
 453     event.Skip();
 454 }
 455
 456 // This was supposed to cure the non-display of the notebook
 457 // until the user resizes the window.
 458 // What's going on?
 459 void wxNotebook::OnInternalIdle()
 460 {
 461     wxWindow::OnInternalIdle();
 462
 463 #if 0
 464     static bool s_bFirstTime = true;
 465     if ( s_bFirstTime ) {
 466       /*
 467       wxSize sz(GetSize());
 468       sz.x ++;
 469       SetSize(sz);
 470       sz.x --;
 471       SetSize(sz);
 472       */
 473
 474       /*
 475       wxSize sz(GetSize());
 476       wxSizeEvent sizeEvent(sz, GetId());
 477       sizeEvent.SetEventObject(this);
 478       GetEventHandler()->ProcessEvent(sizeEvent);
 479       Refresh();
 480       */
 481       s_bFirstTime = false;
 482     }
 483 #endif
 484 }
 485
 486 // Implementation: calculate the layout of the view rect
 487 // and resize the children if required
 488 bool wxNotebook::RefreshLayout(bool force)
 489 {
 490     if (m_tabView)
 491     {
 492         wxRect oldRect = m_tabView->GetViewRect();
 493
 494         int cw, ch;
 495         GetClientSize(& cw, & ch);
 496
 497         int tabHeight = m_tabView->GetTotalTabHeight();
 498         wxRect rect;
 499         rect.x = 4;
 500         rect.y = tabHeight + 4;
 501         rect.width = cw - 8;
 502         rect.height = ch - 4 - rect.y ;
 503
 504         m_tabView->SetViewRect(rect);
 505
 506         m_tabView->LayoutTabs();
 507
 508         // Need to do it a 2nd time to get the tab height with
 509         // the new view width, since changing the view width changes the
 510         // tab layout.
 511         tabHeight = m_tabView->GetTotalTabHeight();
 512         rect.x = 4;
 513         rect.y = tabHeight + 4;
 514         rect.width = cw - 8;
 515         rect.height = ch - 4 - rect.y ;
 516
 517         m_tabView->SetViewRect(rect);
 518
 519         m_tabView->LayoutTabs();
 520
 521         if (!force && (rect == oldRect))
 522           return false;
 523
 524         // fit the notebook page to the tab control's display area
 525
 526         size_t nCount = m_pages.Count();
 527         for ( size_t nPage = 0; nPage < nCount; nPage++ ) {
 528             wxNotebookPage *pPage = m_pages[nPage];
 529             wxRect clientRect = GetAvailableClientSize();
 530             if (pPage->IsShown())
 531             {
 532                 pPage->SetSize(clientRect.x, clientRect.y, clientRect.width, clientRect.height);
 533                 if ( pPage->GetAutoLayout() )
 534                    pPage->Layout();
 535             }
 536         }
 537         Refresh();
 538     }
 539     return true;
 540 }
 541
 542 void wxNotebook::OnSelChange(wxBookCtrlEvent& event)
 543 {
 544     // is it our tab control?
 545     if ( event.GetEventObject() == this )
 546     {
 547         if (event.GetSelection() != m_selection)
 548           ChangePage(event.GetOldSelection(), event.GetSelection());
 549     }
 550
 551     // we want to give others a chance to process this message as well
 552     event.Skip();
 553 }
 554
 555 void wxNotebook::OnSetFocus(wxFocusEvent& event)
 556 {
 557     // set focus to the currently selected page if any
 558     if ( m_selection != -1 )
 559         m_pages[m_selection]->SetFocus();
 560
 561     event.Skip();
 562 }
 563
 564 void wxNotebook::OnNavigationKey(wxNavigationKeyEvent& event)
 565 {
 566     if ( event.IsWindowChange() )
 567     {
 568         // change pages
 569         AdvanceSelection(event.GetDirection());
 570     }
 571     else {
 572         // pass to the parent
 573         if ( GetParent() )
 574         {
 575             event.SetCurrentFocus(this);
 576             GetParent()->ProcessWindowEvent(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_selection = 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   wxBookCtrlEvent 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     wxBookCtrlEvent 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