自学教程：C++ GetMenuCount函数代码示例

void wxMenuBar::RebuildAccelTable(){    //    // Merge the accelerators of all menus into one accel table    //    size_t                          nAccelCount = 0;    size_t                          i;    size_t                          nCount = GetMenuCount();    wxMenuList::iterator it;    for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)    {        nAccelCount += (*it)->GetAccelCount();    }    if (nAccelCount)    {        wxAcceleratorEntry*         pAccelEntries = new wxAcceleratorEntry[nAccelCount];        nAccelCount = 0;        for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)        {            nAccelCount += (*it)->CopyAccels(&pAccelEntries[nAccelCount]);        }        m_vAccelTable = wxAcceleratorTable( nAccelCount                                           ,pAccelEntries                                          );        delete [] pAccelEntries;    }} // end of wxMenuBar::RebuildAccelTable

// Destroy menubar, but keep data structures intact so we can recreate it.bool wxMenuBar::DestroyMenuBar(){    if (!m_mainWidget)    {        SetMenuBarFrame(NULL);        return false;    }    XtUnmanageChild ((Widget) m_mainWidget);    XtUnrealizeWidget ((Widget) m_mainWidget);    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)    {        wxMenu *menu = GetMenu(i);        menu->DestroyMenu(true);    }    XtDestroyWidget((Widget) m_mainWidget);    m_mainWidget = (WXWidget) 0;    SetMenuBarFrame(NULL);    return true;}

void wxMenuBar::RebuildAccelTable(){    // merge the accelerators of all menus into one accel table    size_t nAccelCount = 0;    size_t i, count = GetMenuCount();    wxMenuList::iterator it;    for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )    {        nAccelCount += (*it)->GetAccelCount();    }    if ( nAccelCount )    {        wxAcceleratorEntry *accelEntries = new wxAcceleratorEntry[nAccelCount];        nAccelCount = 0;        for ( i = 0, it = m_menus.begin(); i < count; i++, it++ )        {            nAccelCount += (*it)->CopyAccels(&accelEntries[nAccelCount]);        }        SetAcceleratorTable(wxAcceleratorTable(nAccelCount, accelEntries));        delete [] accelEntries;    }    else // No (more) accelerators.    {        SetAcceleratorTable(wxAcceleratorTable());    }}

int wxMenuBar::MSWPositionForWxMenu(wxMenu *menu, int wxpos){    wxASSERT(menu);    wxASSERT(menu->GetHMenu());    wxASSERT(m_hMenu);#if defined(__WXWINCE__)    int totalMSWItems = GetMenuCount();#else    int totalMSWItems = GetMenuItemCount((HMENU)m_hMenu);#endif    int i; // For old C++ compatibility    for(i=wxpos; i<totalMSWItems; i++)    {        if(GetSubMenu((HMENU)m_hMenu,i)==(HMENU)menu->GetHMenu())            return i;    }    for(i=0; i<wxpos; i++)    {        if(GetSubMenu((HMENU)m_hMenu,i)==(HMENU)menu->GetHMenu())            return i;    }    wxFAIL;    return -1;}

// Gets the original label at the top-level of the menubarwxString wxMenuBar::GetMenuLabel(size_t pos) const{    wxCHECK_MSG( pos < GetMenuCount(), wxEmptyString,                 wxT("invalid menu index in wxMenuBar::GetMenuLabel") );    return m_titles[pos];}

bool wxMenuBar::Append(wxMenu *menu, const wxString& title){    WXHMENU submenu = menu ? menu->GetHMenu() : 0;    wxCHECK_MSG( submenu, false, wxT("can't append invalid menu to menubar") );    if ( !wxMenuBarBase::Append(menu, title) )        return false;    menu->wxMenuBase::SetTitle(title);#if defined(WINCE_WITHOUT_COMMANDBAR)    if (IsAttached())#else    if (GetHmenu())#endif    {#if defined(WINCE_WITHOUT_COMMANDBAR)        if (!GetToolBar())            return false;        TBBUTTON tbButton;        memset(&tbButton, 0, sizeof(TBBUTTON));        tbButton.iBitmap = I_IMAGENONE;        tbButton.fsState = TBSTATE_ENABLED;        tbButton.fsStyle = TBSTYLE_DROPDOWN | TBSTYLE_NO_DROPDOWN_ARROW | TBSTYLE_AUTOSIZE;        size_t pos = GetMenuCount();        HMENU hPopupMenu = (HMENU) menu->GetHMenu() ;        tbButton.dwData = (DWORD)hPopupMenu;        wxString label = wxStripMenuCodes(title);        tbButton.iString = (int) label.wx_str();        tbButton.idCommand = NewControlId();        if (!::SendMessage((HWND) GetToolBar()->GetHWND(), TB_INSERTBUTTON, pos, (LPARAM)&tbButton))        {            wxLogLastError(wxT("TB_INSERTBUTTON"));            return false;        }#else        if ( !::AppendMenu(GetHmenu(), MF_POPUP | MF_STRING,                           (UINT_PTR)submenu, title.wx_str()) )        {            wxLogLastError(wxT("AppendMenu"));        }#endif#if wxUSE_ACCEL        if ( menu->HasAccels() )        {            // need to rebuild accelerator table            RebuildAccelTable();        }#endif // wxUSE_ACCEL        if (IsAttached())            Refresh();    }    return true;}

void wxMenuBar::RebuildAccelTable(){    //    // Merge the accelerators of all menus into one accel table    //    size_t                          nAccelCount = 0;    size_t                          i;    size_t                          nCount = GetMenuCount();    wxMenuList::iterator it;#if defined(__INTEL_COMPILER) && 1 // VDM auto patch#   pragma ivdep#   pragma swp#   pragma unroll#endif#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */#   pragma ivdep#   pragma swp#   pragma unroll#   pragma prefetch#   if 0#       pragma simd noassert#   endif#endif /* VDM auto patch */    for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)    {        nAccelCount += (*it)->GetAccelCount();    }    if (nAccelCount)    {        wxAcceleratorEntry*         pAccelEntries = new wxAcceleratorEntry[nAccelCount];        nAccelCount = 0;#if defined(__INTEL_COMPILER) && 1 // VDM auto patch#   pragma ivdep#   pragma swp#   pragma unroll#endif#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */#   pragma ivdep#   pragma swp#   pragma unroll#   pragma prefetch#   if 0#       pragma simd noassert#   endif#endif /* VDM auto patch */        for (i = 0, it = m_menus.begin(); i < nCount; i++, it++)        {            nAccelCount += (*it)->CopyAccels(&pAccelEntries[nAccelCount]);        }        m_vAccelTable = wxAcceleratorTable( nAccelCount                                           ,pAccelEntries                                          );        delete [] pAccelEntries;    }} // end of wxMenuBar::RebuildAccelTable

bool wxMenuBar::Enable(bool enable){    wxCHECK_MSG( IsAttached(), false, wxT("doesn't work with unattached menubars") );    size_t i;    for (i = 0; i < GetMenuCount(); i++)        EnableTop(i, enable);    return true;}

void wxMenuBarBase::UpdateMenus(){    wxMenu* menu;    int nCount = GetMenuCount();    for (int n = 0; n < nCount; n++)    {        menu = GetMenu( n );        if (menu != NULL)            menu->UpdateUI( NULL );    }}

int wxMenuBar::MSWGetTopMenuPos(WXHMENU hMenu) const{    for ( size_t n = 0 ; n < GetMenuCount(); ++n )    {        wxMenu* menu = GetMenu(n)->MSWGetMenu(hMenu);        if ( menu )            return n;    }    return wxNOT_FOUND;}

// Create menubarbool wxMenuBar::CreateMenuBar(wxFrame* parent){    m_parent = parent; // bleach... override it!    PreCreation();    m_parent = NULL;    if (m_mainWidget)    {        XtVaSetValues((Widget) parent->GetMainWidget(), XmNmenuBar, (Widget) m_mainWidget, NULL);        /*        if (!XtIsManaged((Widget) m_mainWidget))        XtManageChild((Widget) m_mainWidget);        */        XtMapWidget((Widget) m_mainWidget);        return true;    }    Widget menuBarW = XmCreateMenuBar ((Widget) parent->GetMainWidget(),                                       wxMOTIF_STR("MenuBar"), NULL, 0);    m_mainWidget = (WXWidget) menuBarW;    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)    {        wxMenu *menu = GetMenu(i);        wxString title(m_titles[i]);        menu->SetButtonWidget(menu->CreateMenu (this, menuBarW, menu, i, title, true));        if (strcmp (wxStripMenuCodes(title), "Help") == 0)            XtVaSetValues ((Widget) menuBarW, XmNmenuHelpWidget, (Widget) menu->GetButtonWidget(), NULL);        // tear off menu support#if (XmVersion >= 1002)        if ( menu->IsTearOff() )        {            XtVaSetValues(GetWidget(menu),                          XmNtearOffModel, XmTEAR_OFF_ENABLED,                          NULL);            Widget tearOff = XmGetTearOffControl(GetWidget(menu));            wxDoChangeForegroundColour((Widget) tearOff, m_foregroundColour);            wxDoChangeBackgroundColour((Widget) tearOff, m_backgroundColour, true);        }#endif    }    PostCreation();    XtVaSetValues((Widget) parent->GetMainWidget(), XmNmenuBar, (Widget) m_mainWidget, NULL);    XtRealizeWidget ((Widget) menuBarW);    XtManageChild ((Widget) menuBarW);    SetMenuBarFrame(parent);    return true;}

bool wxMenuBar::SetFont(const wxFont& font){    m_font = font;    ChangeFont();    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)        m_menus.Item(i)->GetData()->SetFont(font);    return true;}

void wxMenuBar::EnableTop(size_t pos, bool enable){    wxCHECK_RET( IsAttached(), wxT("doesn't work with unattached menubars") );    wxCHECK_RET( pos < GetMenuCount(), wxT("invalid menu index") );    int flag = enable ? MF_ENABLED : MF_GRAYED;    EnableMenuItem((HMENU)m_hMenu, MSWPositionForWxMenu(GetMenu(pos),pos), MF_BYPOSITION | flag);    Refresh();}

const wxMenuInfoHelperList& wxMenuBarBase::GetMenuInfos() const{    wxMenuInfoHelperList* list = const_cast< wxMenuInfoHelperList* > (& m_menuInfos);    WX_CLEAR_LIST( wxMenuInfoHelperList, *list);    for (size_t i = 0 ; i < GetMenuCount(); ++i)    {        wxMenuInfoHelper* info = new wxMenuInfoHelper();        info->Create( GetMenu(i), GetMenuLabel(i));        list->Append(info);    }    return m_menuInfos;}

wxMenuItem *wxMenuBar::FindItem(int id, wxMenu **itemMenu) const{    if ( itemMenu )        *itemMenu = NULL;    wxMenuItem *item = NULL;    size_t count = GetMenuCount();    for ( size_t i = 0; !item && (i < count); i++ )        item = _wxMenuAt(m_menus, i)->FindItem(id, itemMenu);    return item;}

bool wxMenuBar::SetForegroundColour(const wxColour& col){    m_foregroundColour = col;    if (m_mainWidget)        wxDoChangeForegroundColour(m_mainWidget, (wxColour&) col);    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)        m_menus.Item(i)->GetData()->SetForegroundColour((wxColour&) col);    return true;}

const wxMenuInfoList& wxMenuBar::GetMenuInfos() const{    wxMenuInfoList* list = const_cast< wxMenuInfoList* >( &m_menuInfos ) ;    WX_CLEAR_LIST( wxMenuInfoList , *list ) ;    for( size_t i = 0 ; i < GetMenuCount() ; ++i )    {        wxMenuInfo* info = new wxMenuInfo() ;        info->Create( const_cast<wxMenuBar*>(this)->GetMenu(i) , GetLabelTop(i) ) ;        list->Append( info ) ;    }    return m_menuInfos ;}

// Find the menu menuString, item itemString, and return the item id.// Returns -1 if none found.int wxMenuBar::FindMenuItem(const wxString& menuString, const wxString& itemString) const{    const wxString stripped = wxStripMenuCodes(menuString);    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)    {        if ( wxStripMenuCodes(m_titles[i]) == stripped )            return m_menus.Item(i)->GetData()->FindItem (itemString);    }    return wxNOT_FOUND;}

// Find the itemString in menuString, and return the item id or wxNOT_FOUNDint wxMenuBar::FindMenuItem(const wxString& menuString,                            const wxString& itemString) const{    wxString menuLabel = wxStripMenuCodes(menuString);    size_t count = GetMenuCount();    for ( size_t i = 0; i < count; i++ )    {        wxString title = wxStripMenuCodes(m_titles[i]);        if ( menuLabel == title )            return _wxMenuAt(m_menus, i)->FindItem(itemString);    }    return wxNOT_FOUND;}

wxMenuItem *wxMenuBar::FindItem(int id, wxMenu ** itemMenu) const{    if (itemMenu)        *itemMenu = NULL;    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)    {        wxMenuItem *item = m_menus.Item(i)->GetData()->FindItem(id, itemMenu);        if (item) return item;    }    return NULL;}

bool wxMenuBar::SetForegroundColour(const wxColour& col){    if (!wxWindowBase::SetForegroundColour(col))        return false;    if (!col.IsOk())        return false;    if (m_mainWidget)        wxDoChangeForegroundColour(m_mainWidget, (wxColour&) col);    size_t menuCount = GetMenuCount();    for (size_t i = 0; i < menuCount; i++)        m_menus.Item(i)->GetData()->SetForegroundColour((wxColour&) col);    return true;}

wxMenuItem *wxMenuBarBase::FindItem(int id, wxMenu **menu) const{    if ( menu )        *menu = NULL;    wxMenuItem *item = NULL;    size_t count = GetMenuCount(), i;    wxMenuList::const_iterator it;    for ( i = 0, it = m_menus.begin(); !item && (i < count); i++, it++ )    {        item = (*it)->FindItem(id, menu);    }    return item;}

// get the menu with given handle (recursively)wxMenu* wxMenuBar::MSWGetMenu(WXHMENU hMenu){    wxCHECK_MSG( GetHMenu() != hMenu, NULL,                 wxT("wxMenuBar::MSWGetMenu(): menu handle is wxMenuBar, not wxMenu") );    // query all menus    for ( size_t n = 0 ; n < GetMenuCount(); ++n )    {        wxMenu* menu = GetMenu(n)->MSWGetMenu(hMenu);        if ( menu )            return menu;    }    // unknown hMenu    return NULL;}