/////////////////////////////////////////////////////////////////////////////
// Name:        samples/notebook/notebook.cpp
// Purpose:     a sample demonstrating notebook usage
// Author:      Julian Smart
// Modified by: Dimitri Schoolwerth
// Created:     26/10/98
// Copyright:   (c) 1998-2002 wxWidgets team
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"


#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#include "wx/imaglist.h"
#include "wx/artprov.h"
#include "wx/cshelp.h"
#include "wx/utils.h"
#include "notebook.h"

#ifndef wxHAS_IMAGES_IN_RESOURCES
    #include "../sample.xpm"
#endif

//-----------------------------------------------------------------------------
// MyApp
//-----------------------------------------------------------------------------

wxIMPLEMENT_APP(MyApp);

bool MyApp::OnInit()
{
    if ( !wxApp::OnInit() )
        return false;

#ifdef __WXGTK__
    // Many version of wxGTK generate spurious diagnostic messages when
    // destroying wxNotebook (or removing pages from it), allow wxWidgets to
    // suppress them.
    GTKAllowDiagnosticsControl();
#endif // __WXGTK__

#if wxUSE_HELP
    wxHelpProvider::Set( new wxSimpleHelpProvider );
#endif

    // Create the main window
    MyFrame *frame = new MyFrame();

    frame->Show();

    return true;
}


//-----------------------------------------------------------------------------
// Creation functions
//-----------------------------------------------------------------------------

wxPanel *CreateUserCreatedPage(wxBookCtrlBase *parent)
{
    wxPanel *panel = new wxPanel(parent);

#if wxUSE_HELP
    panel->SetHelpText("Panel with a Button");
#endif

    (void) new wxButton( panel, wxID_ANY, "Button",
                         wxPoint(10, 10), wxDefaultSize );

    return panel;
}

wxPanel *CreateRadioButtonsPage(wxBookCtrlBase *parent)
{
    wxPanel *panel = new wxPanel(parent);

#if wxUSE_HELP
    panel->SetHelpText("Panel with some Radio Buttons");
#endif

    wxString animals[] =
      { "Fox", "Hare", "Rabbit",
        "Sabre-toothed tiger", "T Rex" };

    wxRadioBox *radiobox1 = new wxRadioBox(panel, wxID_ANY, "Choose one",
        wxDefaultPosition, wxDefaultSize, 5, animals, 2, wxRA_SPECIFY_ROWS);

    wxString computers[] =
      { "Amiga", "Commodore 64", "PET",
        "Another" };

    wxRadioBox *radiobox2 = new wxRadioBox(panel, wxID_ANY,
        "Choose your favourite", wxDefaultPosition, wxDefaultSize,
        4, computers, 0, wxRA_SPECIFY_COLS);

    wxBoxSizer *sizerPanel = new wxBoxSizer(wxVERTICAL);
    sizerPanel->Add(radiobox1, 2, wxEXPAND);
    sizerPanel->Add(radiobox2, 1, wxEXPAND);
    panel->SetSizer(sizerPanel);

    return panel;
}

wxPanel *CreateVetoPage(wxBookCtrlBase *parent)
{
    wxPanel *panel = new wxPanel(parent);

#if wxUSE_HELP
    panel->SetHelpText("An empty panel");
#endif

    wxSizer* const s = new wxBoxSizer(wxVERTICAL);
    s->Add(new wxStaticText( panel, wxID_ANY,
                             "This page intentionally left blank" ),
           wxSizerFlags().Expand().DoubleBorder());
    panel->SetSizer(s);

    return panel;
}

wxWindow *CreateFullPageText(wxBookCtrlBase *parent)
{
    wxTextCtrl *text = new wxTextCtrl(parent, wxID_ANY, "Full page text",
                                      wxDefaultPosition, wxDefaultSize,
                                      wxTE_MULTILINE);

#if wxUSE_HELP
    text->SetHelpText("Page consisting of just a text control");
#endif

    return text;
}

wxPanel *CreateInsertPage(wxBookCtrlBase *parent)
{
    wxPanel *panel = new wxPanel(parent);

#if wxUSE_HELP
    panel->SetHelpText("Maroon panel");
#endif

    panel->SetBackgroundColour( wxColour( "MAROON" ) );

    wxSizer* const s = new wxBoxSizer(wxVERTICAL);
    s->Add(new wxStaticText( panel, wxID_ANY,
                             "This page has been inserted, not added." ),
           wxSizerFlags().Expand().DoubleBorder());
    panel->SetSizer(s);

    return panel;
}

int GetIconIndex(wxBookCtrlBase* bookCtrl)
{
    if (bookCtrl)
    {
       const int nImages = bookCtrl->GetImageCount();
       if (nImages > 0)
       {
           return bookCtrl->GetPageCount() % nImages;
       }
    }

    return -1;
}

void CreateInitialPages(wxBookCtrlBase *parent)
{
    // Create and add some panels to the notebook

    wxWindow *page = CreateRadioButtonsPage(parent);
    parent->AddPage( page, RADIOBUTTONS_PAGE_NAME, false, GetIconIndex(parent) );

    page = CreateVetoPage(parent);
    parent->AddPage( page, VETO_PAGE_NAME, false, GetIconIndex(parent) );

    page = CreateFullPageText(parent);
    parent->AddPage( page, TEXT_PAGE_NAME, false, GetIconIndex(parent) );

    page = CreateInsertPage(parent);
    parent->InsertPage( 0, page, I_WAS_INSERTED_PAGE_NAME, false, GetIconIndex(parent) );

    parent->SetSelection(1);
}

wxWindow *CreatePage(wxBookCtrlBase *parent, const wxString&pageName)
{
    if ( pageName.Contains(INSERTED_PAGE_NAME) ||
            pageName.Contains(ADDED_PAGE_NAME) ||
                pageName.Contains(ADDED_SUB_PAGE_NAME) ||
                    pageName.Contains(ADDED_PAGE_NAME_BEFORE) )
        return CreateUserCreatedPage(parent);

    if ( pageName == I_WAS_INSERTED_PAGE_NAME )
        return CreateInsertPage(parent);

    if ( pageName == VETO_PAGE_NAME )
        return CreateVetoPage(parent);

    if ( pageName == RADIOBUTTONS_PAGE_NAME )
        return CreateRadioButtonsPage(parent);

    if ( pageName == TEXT_PAGE_NAME )
        return CreateFullPageText(parent);

    wxFAIL_MSG( "unknown page name" );

    return nullptr;
}


//-----------------------------------------------------------------------------
// MyFrame
//-----------------------------------------------------------------------------

wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
    // File menu
    EVT_MENU_RANGE(ID_BOOK_NOTEBOOK, ID_BOOK_MAX, MyFrame::OnType)
    EVT_MENU_RANGE(ID_ORIENT_DEFAULT, ID_ORIENT_MAX, MyFrame::OnOrient)
    EVT_MENU(ID_SHOW_IMAGES, MyFrame::OnShowImages)
    EVT_MENU_RANGE(ID_FIXEDWIDTH, ID_HORZ_LAYOUT, MyFrame::OnStyle)
    EVT_MENU(wxID_EXIT, MyFrame::OnExit)

    // Operations menu
    EVT_MENU(ID_ADD_PAGE, MyFrame::OnAddPage)
    EVT_MENU(ID_ADD_PAGE_NO_SELECT, MyFrame::OnAddPageNoSelect)
    EVT_MENU(ID_INSERT_PAGE, MyFrame::OnInsertPage)
    EVT_MENU(ID_DELETE_CUR_PAGE, MyFrame::OnDeleteCurPage)
    EVT_MENU(ID_DELETE_LAST_PAGE, MyFrame::OnDeleteLastPage)
    EVT_MENU(ID_NEXT_PAGE, MyFrame::OnNextPage)
    EVT_MENU(ID_CHANGE_SELECTION, MyFrame::OnChangeSelection)
    EVT_MENU(ID_SET_SELECTION, MyFrame::OnSetSelection)
    EVT_MENU(ID_GET_PAGE_SIZE, MyFrame::OnGetPageSize)
    EVT_MENU(ID_SET_PAGE_SIZE, MyFrame::OnSetPageSize)

#if wxUSE_HELP
    EVT_MENU(ID_CONTEXT_HELP, MyFrame::OnContextHelp)
#endif // wxUSE_HELP
    EVT_MENU(ID_HITTEST, MyFrame::OnHitTest)

    // Book controls
#if wxUSE_NOTEBOOK
    EVT_NOTEBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnNotebook)
    EVT_NOTEBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnNotebook)
#endif
#if wxUSE_LISTBOOK
    EVT_LISTBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnListbook)
    EVT_LISTBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnListbook)
#endif
#if wxUSE_CHOICEBOOK
    EVT_CHOICEBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnChoicebook)
    EVT_CHOICEBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnChoicebook)
#endif
#if wxUSE_TREEBOOK
    EVT_TREEBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnTreebook)
    EVT_TREEBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnTreebook)

    EVT_MENU(ID_ADD_SUB_PAGE, MyFrame::OnAddSubPage)
    EVT_MENU(ID_ADD_PAGE_BEFORE, MyFrame::OnAddPageBefore)
    EVT_UPDATE_UI_RANGE(ID_ADD_PAGE_BEFORE, ID_ADD_SUB_PAGE,
                            MyFrame::OnUpdateTreeMenu)
#endif
#if wxUSE_TOOLBOOK
    EVT_TOOLBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnToolbook)
    EVT_TOOLBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnToolbook)
#endif
#if wxUSE_AUI
    EVT_AUINOTEBOOK_PAGE_CHANGED(wxID_ANY, MyFrame::OnAuiNotebook)
    EVT_AUINOTEBOOK_PAGE_CHANGING(wxID_ANY, MyFrame::OnAuiNotebook)
#endif

    // Update title in idle time
    EVT_IDLE(MyFrame::OnIdle)
wxEND_EVENT_TABLE()

MyFrame::MyFrame()
    : wxFrame(nullptr, wxID_ANY, wxString("wxWidgets book controls sample"))
{
#if wxUSE_HELP
    SetExtraStyle(wxFRAME_EX_CONTEXTHELP);
#endif // wxUSE_HELP

#if wxUSE_NOTEBOOK
    m_type = Type_Notebook;
#elif wxUSE_CHOICEBOOK
    m_type = Type_Choicebook;
#elif wxUSE_LISTBOOK
    m_type = Type_Listbook;
#elif wxUSE_TREEBOOK
    m_type = Type_Treebook;
#elif wxUSE_TOOLBOOK
    m_type = Type_Toolbook;
#elif wxUSE_AUI
    m_type = Type_Aui;
#else
    m_type = Type_Simplebook;
#endif

    m_orient = ID_ORIENT_DEFAULT;
    m_chkShowImages = true;
    m_fixedWidth = false;
    m_multi = false;
    m_noPageTheme = false;
    m_buttonBar = false;
    m_horzLayout = false;

    SetIcon(wxICON(sample));

    // menu of the sample
    wxMenu *menuType = new wxMenu;
#if wxUSE_NOTEBOOK
    menuType->AppendRadioItem(ID_BOOK_NOTEBOOK,   "&Notebook\tCtrl-1");
#endif
#if wxUSE_LISTBOOK
    menuType->AppendRadioItem(ID_BOOK_LISTBOOK,   "&Listbook\tCtrl-2");
#endif
#if wxUSE_CHOICEBOOK
    menuType->AppendRadioItem(ID_BOOK_CHOICEBOOK, "&Choicebook\tCtrl-3");
#endif
#if wxUSE_TREEBOOK
    menuType->AppendRadioItem(ID_BOOK_TREEBOOK,   "&Treebook\tCtrl-4");
#endif
#if wxUSE_TOOLBOOK
    menuType->AppendRadioItem(ID_BOOK_TOOLBOOK,   "T&oolbook\tCtrl-5");
#endif
#if wxUSE_AUI
    menuType->AppendRadioItem(ID_BOOK_AUINOTEBOOK,   "&AuiNotebook\tCtrl-6");
#endif
    menuType->AppendRadioItem(ID_BOOK_SIMPLEBOOK, "&Simple book\tCtrl-7");

    menuType->Check(static_cast<int>(ID_BOOK_NOTEBOOK) + m_type, true);

    wxMenu *menuOrient = new wxMenu;
    menuOrient->AppendRadioItem(ID_ORIENT_DEFAULT, "&Default\tAlt-0");
    menuOrient->AppendRadioItem(ID_ORIENT_TOP,     "&Top\tAlt-1");
    menuOrient->AppendRadioItem(ID_ORIENT_BOTTOM,  "&Bottom\tAlt-2");
    menuOrient->AppendRadioItem(ID_ORIENT_LEFT,    "&Left\tAlt-3");
    menuOrient->AppendRadioItem(ID_ORIENT_RIGHT,   "&Right\tAlt-4");

    wxMenu *menuStyle = new wxMenu;
#if wxUSE_NOTEBOOK
    menuStyle->AppendCheckItem(ID_FIXEDWIDTH, "&Fixed Width (wxNotebook)");
    menuStyle->AppendCheckItem(ID_MULTI, "&Multiple lines (wxNotebook)");
    menuStyle->AppendCheckItem(ID_NOPAGETHEME, "&No Page Theme (wxNotebook)");
#endif
#if wxUSE_TOOLBOOK
    menuStyle->AppendCheckItem(ID_BUTTONBAR, "&Button Bar (wxToolbook)");
    menuStyle->AppendCheckItem(ID_HORZ_LAYOUT, "&Horizontal layout (wxToolbook)");
#endif

    wxMenu *menuPageOperations = new wxMenu;
    menuPageOperations->Append(ID_ADD_PAGE, "&Add page\tAlt-A");
    menuPageOperations->Append(ID_ADD_PAGE_NO_SELECT, "&Add page (don't select)\tAlt-B");
    menuPageOperations->Append(ID_INSERT_PAGE, "&Insert page\tAlt-I");
    menuPageOperations->Append(ID_DELETE_CUR_PAGE, "&Delete current page\tAlt-D");
    menuPageOperations->Append(ID_DELETE_LAST_PAGE, "D&elete last page\tAlt-L");
    menuPageOperations->Append(ID_NEXT_PAGE, "&Next page\tAlt-N");
#if wxUSE_TREEBOOK
    menuPageOperations->AppendSeparator();
    menuPageOperations->Append(ID_ADD_PAGE_BEFORE, "Insert page &before\tAlt-B");
    menuPageOperations->Append(ID_ADD_SUB_PAGE, "Add s&ub page\tAlt-U");
#endif
    menuPageOperations->AppendSeparator();
    menuPageOperations->Append(ID_CHANGE_SELECTION, "&Change selection to 0\tCtrl-0");
    menuPageOperations->Append(ID_SET_SELECTION, "&Set selection to 0\tShift-Ctrl-0");
    menuPageOperations->AppendSeparator();
    menuPageOperations->Append(ID_GET_PAGE_SIZE, "Sho&w page size");
    menuPageOperations->Append(ID_SET_PAGE_SIZE, "Set &page size");

    wxMenu *menuOperations = new wxMenu;
#if wxUSE_HELP
    menuOperations->Append(ID_CONTEXT_HELP, "&Context help\tCtrl-F1");
#endif // wxUSE_HELP
    menuOperations->Append(ID_HITTEST, "&Hit test\tCtrl-H");

    wxMenu *menuFile = new wxMenu;
    menuFile->Append(wxID_ANY, "&Type", menuType, "Type of control");
    menuFile->Append(wxID_ANY, "&Orientation", menuOrient, "Orientation of control");
    menuFile->AppendCheckItem(ID_SHOW_IMAGES, "&Show images\tAlt-S");
    menuFile->Append(wxID_ANY, "&Style", menuStyle, "Style of control");
    menuFile->AppendSeparator();
    menuFile->Append(wxID_EXIT, "E&xit", "Quits the application");
    menuFile->Check(ID_SHOW_IMAGES, m_chkShowImages);

    wxMenuBar *menuBar = new wxMenuBar;
    menuBar->Append(menuFile, "&File");
    menuBar->Append(menuPageOperations, "&Pages");
    menuBar->Append(menuOperations, "&Operations");
    SetMenuBar(menuBar);

    // books creation
    m_panel    = nullptr;
    m_bookCtrl = nullptr;

    // use some random images for the book control pages
    const wxSize imageSize(32, 32);

    m_images.push_back(wxArtProvider::GetBitmapBundle(wxART_INFORMATION, wxART_OTHER, imageSize));
    m_images.push_back(wxArtProvider::GetBitmapBundle(wxART_QUESTION, wxART_OTHER, imageSize));
    m_images.push_back(wxArtProvider::GetBitmapBundle(wxART_WARNING, wxART_OTHER, imageSize));
    m_images.push_back(wxArtProvider::GetBitmapBundle(wxART_ERROR, wxART_OTHER, imageSize));

    m_panel = new wxPanel(this);

#if USE_LOG
    m_text = new wxTextCtrl(m_panel, wxID_ANY, wxEmptyString,
                            wxDefaultPosition, wxDefaultSize,
                            wxTE_MULTILINE | wxTE_READONLY);

    m_logTargetOld = wxLog::SetActiveTarget( new wxLogTextCtrl(m_text) );
#endif // USE_LOG

    // Set sizers
    m_sizerFrame = new wxBoxSizer(wxVERTICAL);

#if USE_LOG
    m_sizerFrame->Add(m_text, 1, wxEXPAND);
#endif // USE_LOG

    RecreateBook();

    m_panel->SetSizer(m_sizerFrame);
    m_panel->Layout();

    wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
    sizer->Add(m_panel, wxSizerFlags(1).Expand());
    SetSizerAndFit(sizer);
}

MyFrame::~MyFrame()
{
#if USE_LOG
    delete wxLog::SetActiveTarget(m_logTargetOld);
#endif // USE_LOG
}

// DISPATCH_ON_TYPE() macro is an ugly way to write the "same" code for
// different wxBookCtrlBase-derived classes without duplicating code and
// without using templates, it expands into "before <xxx> after" where "xxx"
// part is control class-specific
#if wxUSE_NOTEBOOK
    #define CASE_NOTEBOOK(x) case Type_Notebook: x; break;
#else
    #define CASE_NOTEBOOK(x)
#endif

#if wxUSE_LISTBOOK
    #define CASE_LISTBOOK(x) case Type_Listbook: x; break;
#else
    #define CASE_LISTBOOK(x)
#endif

#if wxUSE_CHOICEBOOK
    #define CASE_CHOICEBOOK(x) case Type_Choicebook: x; break;
#else
    #define CASE_CHOICEBOOK(x)
#endif

#if wxUSE_TREEBOOK
    #define CASE_TREEBOOK(x) case Type_Treebook: x; break;
#else
    #define CASE_TREEBOOK(x)
#endif

#if wxUSE_TOOLBOOK
    #define CASE_TOOLBOOK(x) case Type_Toolbook: x; break;
#else
    #define CASE_TOOLBOOK(x)
#endif

#if wxUSE_AUI
    #define CASE_AUINOTEBOOK(x) case Type_AuiNotebook: x; break;
#else
    #define CASE_AUINOTEBOOK(x)
#endif

#define CASE_SIMPLEBOOK(x) case Type_Simplebook: x; break;

#define DISPATCH_ON_TYPE(before, nb, lb, cb, tb, toolb, aui, sb, after)       \
    switch ( m_type )                                                         \
    {                                                                         \
        CASE_NOTEBOOK(before nb after)                                        \
        CASE_LISTBOOK(before lb after)                                        \
        CASE_CHOICEBOOK(before cb after)                                      \
        CASE_TREEBOOK(before tb after)                                        \
        CASE_TOOLBOOK(before toolb after)                                     \
        CASE_AUINOTEBOOK(before aui after)                                    \
        CASE_SIMPLEBOOK(before sb after)                                      \
                                                                              \
        default:                                                              \
            wxFAIL_MSG( "unknown book control type" );                   \
    }

void MyFrame::RecreateBook()
{
    int flags;
    switch ( m_orient )
    {
        case ID_ORIENT_TOP:
            flags = wxBK_TOP;
            break;

        case ID_ORIENT_BOTTOM:
            flags = wxBK_BOTTOM;
            break;

        case ID_ORIENT_LEFT:
            flags = wxBK_LEFT;
            break;

        case ID_ORIENT_RIGHT:
            flags = wxBK_RIGHT;
            break;

        default:
            flags = wxBK_DEFAULT;
    }

#if wxUSE_NOTEBOOK
    if ( m_fixedWidth && m_type == Type_Notebook )
        flags |= wxNB_FIXEDWIDTH;
    if ( m_multi && m_type == Type_Notebook )
        flags |= wxNB_MULTILINE;
    if ( m_noPageTheme && m_type == Type_Notebook )
        flags |= wxNB_NOPAGETHEME;
#endif
#if wxUSE_TOOLBOOK
    if ( m_buttonBar && m_type == Type_Toolbook )
        flags |= wxTBK_BUTTONBAR;
    if ( m_horzLayout && m_type == Type_Toolbook )
        flags |= wxTBK_HORZ_LAYOUT;
#endif

    wxBookCtrlBase *oldBook = m_bookCtrl;

    m_bookCtrl = nullptr;

    DISPATCH_ON_TYPE(m_bookCtrl = new,
                         wxNotebook,
                         wxListbook,
                         wxChoicebook,
                         wxTreebook,
                         wxToolbook,
                         wxAuiNotebook,
                         wxSimplebook,
                     (m_panel, wxID_ANY, wxDefaultPosition, wxDefaultSize, flags));

    if ( !m_bookCtrl )
        return;

    m_bookCtrl->Hide();

    // wxToolbook doesn't work without icons so always use them for it.
    if ( m_chkShowImages || m_type == Type_Toolbook )
    {
        m_bookCtrl->SetImages(m_images);
    }

    if ( oldBook )
    {
#if wxUSE_TREEBOOK
        // we only need the old treebook if we're recreating another treebook
        wxTreebook *tbkOld = m_type == Type_Treebook
                                ? wxDynamicCast(oldBook, wxTreebook)
                                : nullptr;
#endif // wxUSE_TREEBOOK

        const int count = oldBook->GetPageCount();
        for ( int n = 0; n < count; n++ )
        {
            const int image = GetIconIndex(m_bookCtrl);
            const wxString str = oldBook->GetPageText(n);

            wxWindow *page = CreatePage(m_bookCtrl, str);

            // treebook complication: need to account for possible parent page
#if wxUSE_TREEBOOK
            if ( tbkOld )
            {
                const int parent = tbkOld->GetPageParent(n);
                if ( parent != wxNOT_FOUND )
                {
                    wxStaticCast(m_bookCtrl, wxTreebook)->
                        InsertSubPage(parent, page, str, false, image);

                    // skip adding it again below
                    continue;
                }
            }
#endif // wxUSE_TREEBOOK

            m_bookCtrl->AddPage(page, str, false, image);
        }

        const int sel = oldBook->GetSelection();
        if ( sel != wxNOT_FOUND )
            m_bookCtrl->SetSelection(sel);


        m_sizerFrame->Detach(oldBook);
        delete oldBook;
    }
    else // no old book
    {
        CreateInitialPages(m_bookCtrl);
    }

    m_sizerFrame->Insert(0, m_bookCtrl, wxSizerFlags(5).Expand().Border());

    m_sizerFrame->Show(m_bookCtrl);
    m_sizerFrame->Layout();
}

void MyFrame::AddFlagStrIfFlagPresent(wxString & flagStr, long flags, long flag,
                                      const wxString& flagName) const
{
    if( (flags & flag) == flag )
    {
        if( !flagStr.empty() )
            flagStr += " | ";
        flagStr += flagName;
    }
}

wxPanel *MyFrame::CreateNewPage() const
{
    wxPanel *panel = new wxPanel(m_bookCtrl, wxID_ANY );

#if wxUSE_HELP
    panel->SetHelpText("Panel with \"First\" and \"Second\" buttons");
#endif

    wxBoxSizer* const sizer = new wxBoxSizer(wxHORIZONTAL);
    panel->SetSizer(sizer);

    sizer->Add(new wxButton(panel, wxID_ANY, "First button"),
               wxSizerFlags().Border());
    sizer->Add(new wxButton(panel, wxID_ANY, "Second button"),
               wxSizerFlags().Border());

    return panel;
}


//-----------------------------------------------------------------------------
// MyFrame - event handlers
//-----------------------------------------------------------------------------

#if wxUSE_HELP

void MyFrame::OnContextHelp(wxCommandEvent& WXUNUSED(event))
{
    // launches local event loop
    wxContextHelp ch( this );
}

#endif // wxUSE_HELP

void MyFrame::OnHitTest(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase * book = GetCurrentBook();
    const wxPoint pt = ::wxGetMousePosition();

    long flags;
    int pagePos = book->HitTest( book->ScreenToClient(pt), &flags );

    wxString flagsStr;

    AddFlagStrIfFlagPresent( flagsStr, flags, wxBK_HITTEST_NOWHERE, "wxBK_HITTEST_NOWHERE" );
    AddFlagStrIfFlagPresent( flagsStr, flags, wxBK_HITTEST_ONICON,  "wxBK_HITTEST_ONICON" );
    AddFlagStrIfFlagPresent( flagsStr, flags, wxBK_HITTEST_ONLABEL, "wxBK_HITTEST_ONLABEL" );
    AddFlagStrIfFlagPresent( flagsStr, flags, wxBK_HITTEST_ONITEM,  "wxBK_HITTEST_ONITEM" );
    AddFlagStrIfFlagPresent( flagsStr, flags, wxBK_HITTEST_ONPAGE,  "wxBK_HITTEST_ONPAGE" );

    wxLogMessage("HitTest at (%d,%d): %d: %s",
                 pt.x,
                 pt.y,
                 pagePos,
                 flagsStr);
}

void MyFrame::OnType(wxCommandEvent& event)
{
    m_type = static_cast<BookType>(event.GetId() - ID_BOOK_NOTEBOOK);

    if ( m_bookCtrl )
        m_sizerFrame->Hide(m_bookCtrl);

    RecreateBook();
}

#if wxUSE_TREEBOOK

void MyFrame::OnUpdateTreeMenu(wxUpdateUIEvent& event)
{
    event.Enable(m_type == Type_Treebook);
}

#endif // wxUSE_TREEBOOK

void MyFrame::OnOrient(wxCommandEvent& event)
{
    m_orient = event.GetId();
    RecreateBook();
    m_sizerFrame->Layout();
}

void MyFrame::OnShowImages(wxCommandEvent& event)
{
    m_chkShowImages = event.IsChecked();
    RecreateBook();
    m_sizerFrame->Layout();
}

void MyFrame::OnStyle(wxCommandEvent& event)
{
    bool checked = event.IsChecked();
    switch (event.GetId())
    {
        case ID_FIXEDWIDTH:  m_fixedWidth = checked;  break;
        case ID_MULTI:       m_multi = checked;       break;
        case ID_NOPAGETHEME: m_noPageTheme = checked; break;
        case ID_BUTTONBAR:   m_buttonBar = checked;   break;
        case ID_HORZ_LAYOUT: m_horzLayout = checked;  break;
        default: break; // avoid compiler warning
    }

    RecreateBook();
    m_sizerFrame->Layout();
}

void MyFrame::OnExit(wxCommandEvent& WXUNUSED(event))
{
    Close();
}

void MyFrame::OnAddPage(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        static unsigned s_pageAdded = 0;
        currBook->AddPage(CreateNewPage(),
                          wxString::Format
                          (
                            ADDED_PAGE_NAME "%u",
                            ++s_pageAdded
                          ),
                          true,
                          GetIconIndex(currBook));
    }
}

void MyFrame::OnAddPageNoSelect(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        static unsigned s_pageAdded = 0;
        currBook->AddPage(CreateNewPage(),
                          wxString::Format
                          (
                            ADDED_PAGE_NAME "%u",
                            ++s_pageAdded
                          ),
                          false,
                          GetIconIndex(currBook));
    }
}

#if wxUSE_TREEBOOK
void MyFrame::OnAddSubPage(wxCommandEvent& WXUNUSED(event))
{
    wxTreebook *currBook = wxDynamicCast(GetCurrentBook(), wxTreebook);
    if ( currBook )
    {
        const int selPos = currBook->GetSelection();
        if ( selPos == wxNOT_FOUND )
        {
            wxLogError("Select the parent page first!");
            return;
        }

        static unsigned s_subPageAdded = 0;
        currBook->InsertSubPage
                  (
                    selPos,
                    CreateNewPage(),
                    wxString::Format
                    (
                     ADDED_SUB_PAGE_NAME "%u",
                     ++s_subPageAdded
                    ),
                    true,
                    GetIconIndex(currBook)
                  );
    }
}

void MyFrame::OnAddPageBefore(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();
    if ( currBook )
    {
        const int selPos = currBook->GetSelection();
        if ( selPos == wxNOT_FOUND )
        {
            wxLogError("Select the parent page first!");
            return;
        }

        static unsigned s_subPageAdded = 0;
        currBook->InsertPage(selPos,
                             CreateNewPage(),
                             wxString::Format
                             (
                                ADDED_PAGE_NAME_BEFORE "%u",
                                ++s_subPageAdded
                             ),
                             true,
                             GetIconIndex(currBook));
    }
}
#endif // wxUSE_TREEBOOK

void MyFrame::OnInsertPage(wxCommandEvent& WXUNUSED(event))
{
    static unsigned s_pageIns = 0;

    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        wxPanel *panel = CreateUserCreatedPage( currBook );

        currBook->InsertPage( 0, panel,
            wxString::Format(INSERTED_PAGE_NAME "%u", ++s_pageIns), false,
            GetIconIndex(currBook) );

        currBook->SetSelection(0);
    }
}

void MyFrame::OnDeleteCurPage(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        int sel = currBook->GetSelection();

        if (sel != wxNOT_FOUND)
        {
            currBook->DeletePage(sel);
        }
    }
}

void MyFrame::OnDeleteLastPage(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        int page = currBook->GetPageCount();

        if ( page != 0 )
        {
            currBook->DeletePage(page - 1);
        }
    }
}

void MyFrame::OnNextPage(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
    {
        currBook->AdvanceSelection();
    }
}

void MyFrame::OnChangeSelection(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
        currBook->ChangeSelection(0);
}

void MyFrame::OnSetSelection(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase *currBook = GetCurrentBook();

    if ( currBook )
        currBook->SetSelection(0);
}

void MyFrame::OnGetPageSize(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase* const currBook = GetCurrentBook();
    if ( !currBook )
        return;

    const wxSize sizePage = currBook->GetPage(0)->GetSize();
    const wxSize sizeBook = currBook->GetSize();

    wxLogMessage("Page size is (%d, %d), book size (%d, %d)",
                 sizePage.x, sizePage.y,
                 sizeBook.x, sizeBook.y);
}

void MyFrame::OnSetPageSize(wxCommandEvent& WXUNUSED(event))
{
    wxBookCtrlBase* const currBook = GetCurrentBook();
    if ( !currBook )
        return;

    const wxSize sizePage(300, 300);
    currBook->SetPageSize(sizePage);

    wxLogMessage("Page size set to (%d, %d)",
                 sizePage.x, sizePage.y);
}

void MyFrame::OnIdle( wxIdleEvent& WXUNUSED(event) )
{
    static int s_nPages = wxNOT_FOUND;
    static int s_nSel = wxNOT_FOUND;
    static wxBookCtrlBase *s_currBook = nullptr;

    wxBookCtrlBase *currBook = GetCurrentBook();

    int nPages = currBook ? currBook->GetPageCount() : 0;
    int nSel = currBook ? currBook->GetSelection() : wxNOT_FOUND;

    if ( nPages != s_nPages || nSel != s_nSel || s_currBook != currBook )
    {
        s_nPages = nPages;
        s_nSel = nSel;
        s_currBook = currBook;

        wxString selection;
        if ( nSel == wxNOT_FOUND )
            selection << "not found";
        else
            selection << nSel;

        wxString title;
        title.Printf("Notebook and friends (%d pages, selection: %s)", nPages, selection);

        SetTitle(title);
    }
}

void MyFrame::OnBookCtrl(wxBookCtrlBaseEvent& event)
{
    static const struct EventInfo
    {
        wxEventType typeChanged,
                    typeChanging;
        const wxString name;
    } events[] =
    {
#if wxUSE_NOTEBOOK
        {
            wxEVT_NOTEBOOK_PAGE_CHANGED,
            wxEVT_NOTEBOOK_PAGE_CHANGING,
            "wxNotebook"
        },
#endif // wxUSE_NOTEBOOK
#if wxUSE_LISTBOOK
        {
            wxEVT_LISTBOOK_PAGE_CHANGED,
            wxEVT_LISTBOOK_PAGE_CHANGING,
            "wxListbook"
        },
#endif // wxUSE_LISTBOOK
#if wxUSE_CHOICEBOOK
        {
            wxEVT_CHOICEBOOK_PAGE_CHANGED,
            wxEVT_CHOICEBOOK_PAGE_CHANGING,
            "wxChoicebook"
        },
#endif // wxUSE_CHOICEBOOK
#if wxUSE_TREEBOOK
        {
            wxEVT_TREEBOOK_PAGE_CHANGED,
            wxEVT_TREEBOOK_PAGE_CHANGING,
            "wxTreebook"
        },
#endif // wxUSE_TREEBOOK
#if wxUSE_TOOLBOOK
        {
            wxEVT_TOOLBOOK_PAGE_CHANGED,
            wxEVT_TOOLBOOK_PAGE_CHANGING,
            "wxToolbook"
        },
#endif // wxUSE_TOOLBOOK
#if wxUSE_AUI
        {
            wxEVT_AUINOTEBOOK_PAGE_CHANGED,
            wxEVT_AUINOTEBOOK_PAGE_CHANGING,
            "wxAuiNotebook"
        },
#endif // wxUSE_AUI
    };


    wxString nameEvent,
             nameControl,
             veto;
    const wxEventType eventType = event.GetEventType();

    // NB: can't use wxStaticCast here as wxBookCtrlBase is not in
    //     wxRTTI
    const wxBookCtrlBase * const
        book = static_cast<wxBookCtrlBase *>(event.GetEventObject());

    for ( size_t n = 0; n < WXSIZEOF(events); n++ )
    {
        const EventInfo& ei = events[n];
        if ( eventType == ei.typeChanged )
        {
            nameEvent = "Changed";
        }
        else if ( eventType == ei.typeChanging )
        {
            const int idx = event.GetOldSelection();

            if ( idx != wxNOT_FOUND &&
                    book && book->GetPageText(idx) == VETO_PAGE_NAME )
            {
                if ( wxMessageBox
                     (
                      "Are you sure you want to leave this page?\n"
                      "(This demonstrates veto-ing)",
                      "Notebook sample",
                      wxICON_QUESTION | wxYES_NO,
                      this
                     ) != wxYES )
                {
                    event.Veto();
                    veto = " (vetoed)";
                }
            }

            nameEvent = "Changing";
        }
        else // skip end of the loop
        {
            continue;
        }

        nameControl = ei.name;
        break;
    }

    static int s_num = 0;

    wxLogMessage("Event #%d: %s: %s (%d) new sel %d, old %d, current %d%s",
                 ++s_num,
                 nameControl,
                 nameEvent,
                 eventType,
                 event.GetSelection(),
                 event.GetOldSelection(),
                 book->GetSelection(),
                 veto);

#if USE_LOG
    m_text->SetInsertionPointEnd();
#endif
}
